/* ═══════════════════════════════════════════════════
   DoubleHub — Design System & Stylesheet
   Clean / Minimal / Apple-inspired
   ═══════════════════════════════════════════════════ */

/* ── Fonts ── */
@import url('https://api.fontshare.com/v2/css?f[]=general-sans@400,500,600,700&f[]=cabinet-grotesk@500,700,800&display=swap');

/* ── Design Tokens ── */
:root, [data-theme="light"] {
  --font-body: 'General Sans', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-display: 'Cabinet Grotesk', 'General Sans', 'Hiragino Sans', sans-serif;

  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Colors — Light Mode */
  --color-bg:             #FAFAFA;
  --color-surface:        #FFFFFF;
  --color-surface-2:      #F5F5F5;
  --color-border:         #E5E5E5;
  --color-divider:        #ECECEC;
  --color-text:           #1A1A1A;
  --color-text-muted:     #6B6B6B;
  --color-text-faint:     #A3A3A3;
  --color-text-inverse:   #FFFFFF;
  --color-primary:        #0A8A8A;
  --color-primary-hover:  #077070;
  --color-primary-soft:   #E6F5F5;
  --color-accent-warm:    #E8734A;
  --color-accent-warm-soft: #FEF0EB;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.1);

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1200px;
}

/* ── Dark Mode ── */
[data-theme="dark"] {
  --color-bg:             #0F0F0F;
  --color-surface:        #1A1A1A;
  --color-surface-2:      #222222;
  --color-border:         #2E2E2E;
  --color-divider:        #262626;
  --color-text:           #E5E5E5;
  --color-text-muted:     #8A8A8A;
  --color-text-faint:     #555555;
  --color-text-inverse:   #1A1A1A;
  --color-primary:        #2EBDBD;
  --color-primary-hover:  #26A3A3;
  --color-primary-soft:   rgba(46,189,189,0.1);
  --color-accent-warm:    #F09070;
  --color-accent-warm-soft: rgba(240,144,112,0.1);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.35);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0F0F0F;
    --color-surface:        #1A1A1A;
    --color-surface-2:      #222222;
    --color-border:         #2E2E2E;
    --color-divider:        #262626;
    --color-text:           #E5E5E5;
    --color-text-muted:     #8A8A8A;
    --color-text-faint:     #555555;
    --color-text-inverse:   #1A1A1A;
    --color-primary:        #2EBDBD;
    --color-primary-hover:  #26A3A3;
    --color-primary-soft:   rgba(46,189,189,0.1);
    --color-accent-warm:    #F09070;
    --color-accent-warm-soft: rgba(240,144,112,0.1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.35);
    --shadow-xl: 0 24px 60px rgba(0,0,0,0.4);
  }
}

/* ── Base Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  -moz-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; }

::selection {
  background: rgba(10,138,138,0.15);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a, button, [role="button"], input, textarea, select {
  transition: color var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ── Layout ── */
.container {
  width: min(var(--content-wide), calc(100vw - var(--space-8)));
  margin: 0 auto;
}

.container--narrow {
  width: min(var(--content-default), calc(100vw - var(--space-8)));
}

/* ── Header / Nav ── */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: var(--space-4) 0;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.header--scrolled {
  border-bottom-color: var(--color-divider);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.brand__logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 8px;
  object-fit: cover;
}

.brand__text {
  display: flex;
  flex-direction: column;
}

.brand__name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.brand__tagline {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.3;
}

/* Nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  background: var(--color-text);
  color: var(--color-text-inverse);
}

.nav__cta:hover {
  opacity: 0.85;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

/* Mobile menu */
.menu-toggle {
  display: none;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

/* ── Nav Dropdown ── */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__dropdown-arrow {
  transition: transform var(--transition-interactive);
}

.nav__dropdown-trigger[aria-expanded="true"] .nav__dropdown-arrow {
  transform: rotate(180deg);
}

.nav__dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  min-width: 240px;
  padding: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 60;
}

.nav__dropdown-menu.is-open {
  display: flex;
  flex-direction: column;
}

.nav__dropdown-item {
  display: flex;
  flex-direction: column;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  transition: background var(--transition-interactive);
}

.nav__dropdown-item:hover {
  background: var(--color-surface-2);
}

.nav__dropdown-item-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__dropdown-item-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

.nav__coming-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ── Sections ── */
.section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.section--tight {
  padding: clamp(var(--space-8), 5vw, var(--space-16)) 0;
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: var(--space-4);
}

.section__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.7;
}

.section__header {
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}

.section__header--center {
  text-align: center;
}

.section__header--center .section__subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ── Hero ── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: clamp(var(--space-16), 10vw, var(--space-32));
  padding-bottom: clamp(var(--space-12), 8vw, var(--space-20));
}

.hero__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border: 1px solid rgba(10,138,138,0.12);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  max-width: 1050px;
  margin-bottom: var(--space-6);
}

.hero__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: var(--space-8);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-text);
  color: var(--color-text-inverse);
}

.btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  border-color: var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.btn--secondary:hover {
  border-color: var(--color-text-muted);
  transform: translateY(-1px);
}

.btn--teal {
  background: var(--color-primary);
  color: #fff;
}

.btn--teal:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ── Hero Visual (Hub Diagram) ── */
.hub-visual {
  position: relative;
  width: min(100%, 520px);
  aspect-ratio: 1;
  margin: 0 auto;
}

.hub-visual__center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #0A6E6E);
  display: grid;
  place-items: center;
  color: #fff;
  text-align: center;
  box-shadow: 0 20px 50px rgba(10,138,138,0.25);
  z-index: 2;
}

.hub-visual__center-label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 2px;
}

.hub-visual__center-text {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  line-height: 1.3;
}

.hub-visual__orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: 1px dashed var(--color-border);
  transform: translate(-50%, -50%);
}

.hub-visual__orbit--inner {
  width: 280px;
  height: 280px;
  animation: spin-slow 30s linear infinite;
}

.hub-visual__orbit--outer {
  width: 430px;
  height: 430px;
  animation: spin-slow 45s linear infinite reverse;
}

.hub-visual__node {
  position: absolute;
  display: grid;
  place-items: center;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  z-index: 1;
}

.hub-visual__node--tl { top: 6%; left: 12%; }
.hub-visual__node--tr { top: 6%; right: 12%; }
.hub-visual__node--br { bottom: 6%; right: 12%; }
.hub-visual__node--bl { bottom: 6%; left: 12%; }

@keyframes spin-slow {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ── Stats Row ── */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  width: min(100%, 800px);
  margin: 0 auto;
}

.stat {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-align: center;
}

.stat__label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}

.stat__value {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ── Cards Grid ── */
.cards {
  display: grid;
  gap: var(--space-4);
}

.cards--2 { grid-template-columns: repeat(2, 1fr); }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.cards--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition-interactive),
              transform var(--transition-interactive),
              border-color var(--transition-interactive);
}

.card--hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.card__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Ecosystem Panel ── */
.ecosystem {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.ecosystem__tabs {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border-right: 1px solid var(--color-divider);
}

.ecosystem__tab {
  width: 100%;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-interactive);
  cursor: pointer;
}

.ecosystem__tab:hover {
  background: var(--color-surface-2);
}

.ecosystem__tab.is-active {
  background: var(--color-primary-soft);
  border-color: rgba(10,138,138,0.15);
}

.ecosystem__tab-badge {
  display: inline-flex;
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.ecosystem__tab-badge--current {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.ecosystem__tab-badge--future {
  color: var(--color-accent-warm);
  background: var(--color-accent-warm-soft);
}

.ecosystem__tab-name {
  display: block;
  font-weight: 600;
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}

.ecosystem__tab-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.ecosystem__panels {
  position: relative;
  min-height: 400px;
}

.ecosystem__panel {
  display: none;
  padding: var(--space-6);
}

.ecosystem__panel.is-active {
  display: block;
}

.ecosystem__panel-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
  line-height: 1.3;
}

.insight-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.insight-box {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface-2);
}

.insight-box__label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.insight-box__list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.insight-box__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-left: var(--space-4);
  position: relative;
}

.insight-box__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.4;
}

/* ── Problem / 2-column text ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.two-col p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ── Entrance Cards (services) ── */
.entrance-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.entrance {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
}

.entrance:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.entrance--featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.entrance__screen {
  position: relative;
  padding: var(--space-5);
  min-height: 200px;
  color: #fff;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  overflow: hidden;
}

.entrance__screen::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,0.15) 100%);
}

.entrance__screen--train {
  background: linear-gradient(160deg, #1B8B7A, #42B59D);
}

.entrance__screen--book {
  background: linear-gradient(160deg, #C17837, #E8A54A);
}

.entrance__screen--hub {
  background: linear-gradient(160deg, var(--color-primary), #0A6E6E);
}

.entrance__screen-chip {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: fit-content;
  padding: 4px var(--space-2);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
}

.entrance__screen-name {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}

.entrance__screen-desc {
  position: relative;
  z-index: 1;
  font-size: var(--text-xs);
  opacity: 0.85;
  line-height: 1.5;
}

.entrance__screen-bars {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: end;
  gap: 6px;
  height: 60px;
}

.entrance__screen-bars span {
  height: var(--bar);
  border-radius: 4px 4px 2px 2px;
  background: rgba(255,255,255,0.6);
  animation: float-bar 3s ease-in-out infinite;
}

.entrance__screen-bars span:nth-child(2) { animation-delay: 0.2s; }
.entrance__screen-bars span:nth-child(3) { animation-delay: 0.4s; }
.entrance__screen-bars span:nth-child(4) { animation-delay: 0.6s; }

@keyframes float-bar {
  0%, 100% { opacity: 0.6; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(-3px); }
}

.entrance__screen-tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.entrance__screen-tags span {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.2);
  font-size: 0.7rem;
}

.entrance__screen-flow {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.entrance__screen-flow span {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.2);
  font-size: 0.7rem;
}

.entrance__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.entrance__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.entrance__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
}

.entrance__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.entrance__tags span {
  padding: 4px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.entrance__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-top: var(--space-2);
}

.entrance__link:hover {
  color: var(--color-primary-hover);
}

.entrance__link::after {
  content: "→";
  transition: transform var(--transition-interactive);
}

.entrance__link:hover::after {
  transform: translateX(3px);
}

.entrance__store-link {
  display: inline-block;
  margin-top: var(--space-3);
  opacity: 0.9;
  transition: opacity var(--transition-interactive);
}

.entrance__store-link:hover {
  opacity: 1;
}

/* ── Service Spotlight ── */
.spotlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.spotlight--alt {
  direction: rtl;
}

.spotlight--alt > * {
  direction: ltr;
}

.spotlight__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  background: transparent;
  border: 1.5px solid var(--color-border);
  margin-bottom: var(--space-4);
}

/* App name tag used in detail hero and entrance cards */
.app-name-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  background: transparent;
  border: 1.5px solid var(--color-border);
  margin-bottom: var(--space-4);
}

.spotlight__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.spotlight__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.spotlight__visual {
  display: grid;
  place-items: center;
}

.phone-mock {
  width: min(100%, 280px);
  border-radius: 32px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
}

.phone-mock__inner {
  border-radius: 22px;
  overflow: hidden;
  padding: var(--space-5);
  min-height: 380px;
}

.phone-mock__inner--train {
  background: linear-gradient(180deg, #E8F7F3, var(--color-surface));
}

.phone-mock__inner--book {
  background: linear-gradient(180deg, #FBF0E4, var(--color-surface));
}

.phone-mock__metric {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  margin-bottom: var(--space-4);
  border: 1px solid var(--color-border);
}

.phone-mock__metric span {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.phone-mock__metric strong {
  font-size: var(--text-base);
  font-weight: 700;
}

.phone-mock__bars {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  align-items: end;
  gap: 8px;
  height: 100px;
  margin-bottom: var(--space-4);
}

.phone-mock__bars span {
  height: var(--bar);
  border-radius: 4px;
  background: var(--color-primary);
  opacity: 0.3;
  animation: float-bar 3.5s ease-in-out infinite;
}

.phone-mock__bars span:nth-child(odd) {
  opacity: 0.6;
}

.phone-mock__bars span:nth-child(2) { animation-delay: 0.3s; }
.phone-mock__bars span:nth-child(3) { animation-delay: 0.6s; }
.phone-mock__bars span:nth-child(4) { animation-delay: 0.9s; }
.phone-mock__bars span:nth-child(5) { animation-delay: 1.2s; }

.phone-mock__card {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-3);
}

.phone-mock__card strong {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.phone-mock__card p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.phone-mock__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-4);
}

.phone-mock__tags span {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* ── Scenario / Future ── */
.scenarios {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.scenario {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.scenario__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.scenario__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Roadmap ── */
.roadmap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.roadmap__item {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  position: relative;
}

.roadmap__phase {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.roadmap__phase--now {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.roadmap__phase--next {
  color: var(--color-accent-warm);
  background: var(--color-accent-warm-soft);
}

.roadmap__phase--future {
  color: var(--color-text-muted);
  background: var(--color-surface-2);
}

.roadmap__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.roadmap__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Founder / Vision ── */
.vision-card {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-align: center;
}

.vision-card p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: none;
}

.vision-card p + p {
  margin-top: var(--space-4);
}

/* ── FAQ ── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 800px;
  margin: 0 auto;
}

.faq-list details {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  font-size: var(--text-base);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::after {
  content: "+";
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: transform var(--transition-interactive);
}

.faq-list details[open] summary::after {
  transform: rotate(45deg);
}

.faq-list details[open] summary {
  margin-bottom: var(--space-3);
}

.faq-list details p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Newsletter ── */
.newsletter {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.newsletter__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.newsletter__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.newsletter__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.newsletter__form input {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  font-size: var(--text-sm);
}

.newsletter__form input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10,138,138,0.1);
  outline: none;
}

.newsletter__note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ── Footer ── */
.footer {
  padding: var(--space-8) 0 var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.footer__logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: cover;
}

.footer__desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  max-width: 320px;
  line-height: 1.6;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer__links a:hover {
  color: var(--color-text);
}

.footer__attr {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
}

.footer__attr a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 2px;
}

.footer__attr a:hover {
  color: var(--color-text);
}

/* ── Detail Pages ── */
.detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding-top: clamp(var(--space-12), 6vw, var(--space-20));
  padding-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}

.detail-hero__copy .section__title {
  font-size: var(--text-2xl);
}

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.detail-card {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.detail-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.detail-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.detail-card ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.detail-card li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-left: var(--space-4);
  position: relative;
}

.detail-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.4;
}

.flow-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.flow-card {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.flow-card__label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.flow-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Scroll Reveal (JS-driven IntersectionObserver) ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Divider ── */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-divider);
  margin: 0;
  border: none;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .ecosystem {
    grid-template-columns: 1fr;
  }
  .ecosystem__tabs {
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-divider);
    -webkit-overflow-scrolling: touch;
  }
  .ecosystem__tab {
    flex-shrink: 0;
    min-width: 180px;
  }
  .spotlight {
    grid-template-columns: 1fr;
  }
  .spotlight--alt {
    direction: ltr;
  }
  .detail-hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    z-index: 100;
  }

  .nav.is-open {
    display: flex;
  }

  .nav__link, .nav__cta, .theme-toggle {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  .nav__dropdown {
    width: 100%;
  }

  .nav__dropdown-trigger {
    width: 100%;
    justify-content: center;
  }

  .nav__dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    border-top: 1px solid var(--color-divider);
    border-radius: 0;
    margin-top: var(--space-2);
    padding: var(--space-2) 0;
    background: transparent;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .stats { grid-template-columns: 1fr; }
  .cards--2,
  .cards--3,
  .cards--4 { grid-template-columns: 1fr; }
  .entrance-cards { grid-template-columns: 1fr; }
  .scenarios { grid-template-columns: 1fr; }
  .roadmap { grid-template-columns: 1fr; }
  .newsletter { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .insight-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .flow-cards { grid-template-columns: 1fr; }

  .hub-visual {
    max-width: 360px;
  }

  .hub-visual__orbit--outer { width: 320px; height: 320px; }
  .hub-visual__orbit--inner { width: 210px; height: 210px; }
  .hub-visual__center { width: 110px; height: 110px; }
  .hub-visual__center-text { font-size: var(--text-xs); }
  .hub-visual__node { width: 64px; height: 64px; font-size: 0.65rem; }

  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding: clamp(var(--space-8), 6vw, var(--space-16)) 0;
  }
}

@media (max-width: 480px) {
  .header__inner {
    position: relative;
  }
}

/* ═══════════════════════════════════════════════════
   V2 Additions
   ═══════════════════════════════════════════════════ */

/* ── Hub Visual V2 ── */
.hub-visual-v2 {
  width: min(100%, 700px);
  margin: 0 auto;
}

.hub-v2__ring {
  position: relative;
  width: min(100%, 400px);
  aspect-ratio: 1;
  margin: 0 auto var(--space-8);
}

.hub-v2__connections {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hub-v2__center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #0A6E6E);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
  box-shadow: 0 16px 40px rgba(10,138,138,0.25);
  z-index: 2;
}

.hub-v2__center-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.hub-v2__center-sub {
  font-size: 0.65rem;
  opacity: 0.8;
  margin-top: 2px;
}

.hub-v2__node {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  z-index: 1;
}

.hub-v2__node-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
}

.hub-v2__node-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
}

.hub-v2__node--top    { top: 0; left: 50%; transform: translateX(-50%); }
.hub-v2__node--right  { top: 50%; right: 0; transform: translateY(-50%); }
.hub-v2__node--bottom { bottom: 0; left: 50%; transform: translateX(-50%); }
.hub-v2__node--left   { top: 50%; left: 0; transform: translateY(-50%); }

/* Journey steps below diagram */
.hub-v2__journey {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.hub-v2__step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-1);
}

.hub-v2__step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 700;
}

.hub-v2__step-title {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text);
}

.hub-v2__step-text {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.hub-v2__step-arrow {
  display: flex;
  align-items: center;
  padding-top: var(--space-3);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

/* ── Ecosystem mobile selector ── */
.ecosystem__mobile-selector {
  display: none;
}

.ecosystem__select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236B6B6B' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  cursor: pointer;
}

/* ── Ecosystem screenshots ── */
.ecosystem__screenshots {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-2);
}

.ecosystem__screenshot {
  width: 180px;
  flex-shrink: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

/* ── Ecosystem abstract visuals ── */
.ecosystem__abstract-visual {
  margin-top: var(--space-5);
  display: flex;
  justify-content: center;
}

.abstract-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface-2);
  border: 1px dashed var(--color-border);
  max-width: 320px;
}

.abstract-card__svg {
  width: 200px;
  height: 160px;
}

.abstract-card__label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  text-align: center;
}

/* ── Ecosystem badge — Coming Soon ── */
.ecosystem__tab-badge--coming {
  color: #B37F00;
  background: #FFF8E1;
}

[data-theme="dark"] .entrance__store-link img,
[data-theme="dark"] .spotlight img[alt*="App Store"],
[data-theme="dark"] .hero__actions img[alt*="App Store"],
[data-theme="dark"] .detail-hero__copy img[alt*="App Store"] {
  filter: invert(1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .entrance__store-link img,
  :root:not([data-theme]) .spotlight img[alt*="App Store"],
  :root:not([data-theme]) .hero__actions img[alt*="App Store"],
  :root:not([data-theme]) .detail-hero__copy img[alt*="App Store"] {
    filter: invert(1);
  }
}

[data-theme="dark"] .ecosystem__tab-badge--coming {
  color: #FFD54F;
  background: rgba(255,213,79,0.1);
}

/* ── Problem section cards ── */
.problem-visual {
  max-width: 1000px;
  margin: 0 auto;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.problem-card {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-align: center;
}

.problem-card__icon {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.problem-card__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.problem-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ── Entrance card with background image ── */
.entrance--has-bg .entrance__screen {
  position: relative;
  overflow: hidden;
}

.entrance__bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  opacity: 0.25;
  filter: blur(1px);
}

.entrance__screen-overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.entrance__screen--train .entrance__screen-overlay {
  background: linear-gradient(160deg, rgba(27,139,122,0.85), rgba(66,181,157,0.85));
}

.entrance__screen--book .entrance__screen-overlay {
  background: linear-gradient(160deg, rgba(193,120,55,0.85), rgba(232,165,74,0.85));
}

.entrance__screen--hub .entrance__screen-overlay {
  background: linear-gradient(160deg, rgba(10,138,138,0.9), rgba(10,110,110,0.9));
}

.entrance--has-bg .entrance__screen > *:not(.entrance__bg-img):not(.entrance__screen-overlay) {
  position: relative;
  z-index: 1;
}

/* Coming soon badge on entrance card */
.entrance__coming-badge {
  position: relative;
  z-index: 1;
  display: inline-flex;
  width: fit-content;
  padding: 4px var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(255,255,255,0.25);
  backdrop-filter: blur(8px);
  letter-spacing: 0.04em;
}

.entrance--coming {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

/* ── Scenario cards updated ── */
.scenarios {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.scenario {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.scenario__icon {
  font-size: 1.75rem;
  margin-bottom: var(--space-3);
}

/* ── Roadmap updated — with checklist ── */
.roadmap__item--active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.roadmap__checklist {
  list-style: none;
  padding: 0;
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.roadmap__check {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.5;
}

.roadmap__check::before {
  content: "○";
  position: absolute;
  left: 0;
  color: var(--color-text-faint);
  font-size: 0.8rem;
}

.roadmap__check--done::before {
  content: "✓";
  color: var(--color-primary);
}

.roadmap__check--progress::before {
  content: "◐";
  color: var(--color-accent-warm);
}

/* ── Vision Rich Section ── */
.vision-rich {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  gap: var(--space-6);
}

.vision-rich__main {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.vision-rich__quote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.6;
  margin-bottom: var(--space-6);
  padding-left: var(--space-5);
  border-left: 3px solid var(--color-primary);
}

.vision-rich__main p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
}

.vision-rich__main p + p {
  margin-top: var(--space-4);
}

.vision-rich__values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.vision-value {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-align: center;
}

.vision-value__icon {
  font-size: 1.5rem;
  margin-bottom: var(--space-3);
}

.vision-value__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.vision-value__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ── FAQ privacy list ── */
.faq-privacy-list {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.faq-privacy-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-left: var(--space-5);
  position: relative;
}

.faq-privacy-list li::before {
  content: "🔒";
  position: absolute;
  left: 0;
  font-size: 0.75rem;
}

/* ── Footer company/copyright ── */
.footer__company {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
}

/* ── Phone mock real image ── */
.phone-mock__real-img {
  width: 100%;
  height: auto;
  border-radius: 22px;
  display: block;
}

/* ── Detail page screenshot gallery ── */
.detail-screenshots {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-2) 0;
}

.detail-screenshot-item {
  flex-shrink: 0;
  width: 220px;
}

.detail-screenshot-item img {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.detail-screenshot-item figcaption {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-2);
}

/* ── App Store button placeholder ── */
.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  background: var(--color-text);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
}

.app-store-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.app-store-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ── Hero Screenshots ── */
.hero__screenshots {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  max-width: 640px;
  margin: 0 auto;
}

.hero__screenshot-item {
  flex: 1;
  max-width: 280px;
  text-align: center;
}

.hero__screenshot-caption {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-top: var(--space-3);
}

.phone-mock--hero {
  filter: drop-shadow(var(--shadow-lg));
}

/* ── Ideal Section ── */
.ideal {
  max-width: 800px;
  margin: 0 auto;
}

.ideal__lead {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  text-align: center;
  line-height: 1.7;
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.ideal__contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.ideal__contrast-item {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.ideal__contrast-item ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.ideal__contrast-item li {
  font-size: var(--text-sm);
  line-height: 1.6;
  padding-left: var(--space-5);
  position: relative;
}

.ideal__contrast-item--not {
  background: var(--color-surface-2);
}

.ideal__contrast-item--not li::before {
  content: "×";
  position: absolute;
  left: 0;
  color: var(--color-text-faint);
  font-weight: 700;
}

.ideal__contrast-item--yes {
  background: var(--color-primary-soft);
  border-color: rgba(10,138,138,0.2);
}

.ideal__contrast-item--yes li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.ideal__contrast-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
}

.ideal__contrast-item--not .ideal__contrast-label {
  color: var(--color-text-faint);
}

.ideal__contrast-item--yes .ideal__contrast-label {
  color: var(--color-primary);
}

/* ── Solution Section ── */
.solution {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: var(--space-10);
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.solution__steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.solution__step {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.solution__step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-base);
}

.solution__step-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
  line-height: 1.3;
}

.solution__step-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.solution__visual {
  display: flex;
  justify-content: center;
}

.solution__visual .phone-mock {
  max-width: 280px;
  filter: drop-shadow(var(--shadow-lg));
}

/* ── Use Cases — Comparison Cards ── */
.use-cases {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}

.use-case {
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  overflow: hidden;
}

.use-case__header {
  padding: var(--space-5) var(--space-6) var(--space-3);
}

.use-case__badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-2);
}

.use-case__badge--trainnote {
  background: rgba(27,139,122,0.12);
  color: #1B8B7A;
}

[data-theme="dark"] .use-case__badge--trainnote {
  background: rgba(27,139,122,0.2);
  color: #4ECDC4;
}

.use-case__badge--bookcompass {
  background: rgba(193,120,55,0.12);
  color: #C17837;
}

[data-theme="dark"] .use-case__badge--bookcompass {
  background: rgba(193,120,55,0.2);
  color: #E8A54A;
}

.use-case__badge--cross {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.use-case__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.3;
}

.use-case__comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-divider);
  margin: 0 var(--space-6);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.use-case__generic,
.use-case__doublehub {
  padding: var(--space-5);
}

.use-case__generic {
  background: var(--color-surface-2);
}

.use-case__doublehub {
  background: var(--color-primary-soft);
}

.use-case__ai-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3);
}

.use-case__generic .use-case__ai-label {
  color: var(--color-text-faint);
}

.use-case__doublehub .use-case__ai-label {
  color: var(--color-primary);
}

.use-case__ai-response {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-text-muted);
}

.use-case__doublehub .use-case__ai-response {
  color: var(--color-text);
}

.use-case__why {
  padding: var(--space-4) var(--space-6) var(--space-5);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  border-top: 1px solid var(--color-divider);
}

/* ── V2 Responsive ── */
@media (max-width: 1024px) {
  .ecosystem__mobile-selector {
    display: block;
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-divider);
  }
  .ecosystem__tabs {
    display: none;
  }
  .problem-grid {
    grid-template-columns: 1fr;
  }
  .vision-rich__values {
    grid-template-columns: 1fr;
  }
  .solution {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .solution__visual {
    order: -1;
  }
  .solution__visual .phone-mock {
    max-width: 220px;
  }
}

@media (max-width: 768px) {
  .hub-v2__ring {
    max-width: 300px;
  }
  .hub-v2__node-icon {
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }
  .hub-v2__center {
    width: 90px;
    height: 90px;
  }
  .hub-v2__center-name {
    font-size: 0.7rem;
  }
  .hub-v2__center-sub {
    font-size: 0.55rem;
  }
  .hub-v2__journey {
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
  }
  .hub-v2__step-arrow {
    transform: rotate(90deg);
    padding-top: 0;
  }
  .scenarios {
    grid-template-columns: 1fr;
  }
  .ecosystem__screenshot {
    width: 150px;
  }
  .ideal__contrast {
    grid-template-columns: 1fr;
  }
  .use-case__comparison {
    grid-template-columns: 1fr;
  }
  .hero__screenshots {
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
  }
}

@media (min-width: 1025px) {
  .ecosystem__mobile-selector {
    display: none;
  }
}

/* ═══════════════════════════════════════
   Blog & Article Styles
   ═══════════════════════════════════════ */

/* ── Blog Listing ── */
.blog-hero {
  padding: var(--space-16) 0 var(--space-8);
  text-align: center;
}

.blog-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.blog-hero__desc {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Blog Category Tabs */
.blog-tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.blog-tab {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
}

.blog-tab:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.blog-tab--active {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
  padding-bottom: var(--space-16);
}

.blog-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.blog-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.blog-card__body {
  padding: var(--space-5) var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card__cluster {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.blog-card__cluster--pillar {
  background: var(--color-primary-soft);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.blog-card__cluster--news {
  color: #D97706;
  background: rgba(217, 119, 6, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.blog-card__cluster--info {
  color: #7C3AED;
  background: rgba(124, 58, 237, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* Article Sources Section */
.article-sources {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.article-sources h2 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.sources-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sources-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-4);
  position: relative;
}

.sources-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.sources-list a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 2px;
}

.sources-list a:hover {
  color: var(--color-primary);
  text-decoration-color: var(--color-primary);
}

.blog-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-3);
}

.blog-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.blog-card__author-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

/* ── Article Page ── */
.article {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: var(--space-16) var(--space-4) var(--space-20);
}

.article__header {
  margin-bottom: var(--space-10);
}

.article__cluster {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.article__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.article__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.article__meta-sep {
  color: var(--color-text-faint);
}

.article__author-link {
  color: var(--color-primary);
  font-weight: 500;
}

.article__author-link:hover {
  text-decoration: underline;
}

.article__updated {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
}

/* Article content prose */
.article__content {
  font-size: var(--text-base);
  line-height: 1.85;
}

.article__content h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.article__content h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.article__content p {
  margin-bottom: var(--space-5);
  max-width: none;
}

.article__content ul,
.article__content ol {
  margin-bottom: var(--space-5);
  padding-left: var(--space-6);
}

.article__content li {
  margin-bottom: var(--space-2);
  max-width: none;
}

.article__content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-surface-2);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-muted);
  font-style: italic;
}

.article__content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
}

.article__content th,
.article__content td {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  text-align: left;
}

.article__content th {
  background: var(--color-surface-2);
  font-weight: 600;
}

.article__content strong {
  font-weight: 600;
}

.article__content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article__content a:hover {
  color: var(--color-primary-hover);
}

/* Article FAQ */
.article__faq {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 2px solid var(--color-divider);
}

.article__faq h2 {
  margin-top: 0;
  border: none;
  padding-top: 0;
}

.article__faq details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0;
  margin-bottom: var(--space-3);
  overflow: hidden;
}

.article__faq summary {
  padding: var(--space-4) var(--space-5);
  font-weight: 600;
  cursor: pointer;
  font-size: var(--text-sm);
}

.article__faq summary:hover {
  background: var(--color-surface-2);
}

.article__faq details[open] summary {
  border-bottom: 1px solid var(--color-border);
}

.article__faq details p {
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* Author box in articles */
.author-box {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  padding: var(--space-6);
  margin-top: var(--space-10);
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.author-box__avatar {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  flex-shrink: 0;
}

.author-box__name {
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
}

.author-box__role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.author-box__bio {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.author-box__link {
  display: inline-block;
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 500;
}

.author-box__link:hover {
  text-decoration: underline;
}

/* CTA Banner in articles */
.article-cta {
  margin: var(--space-10) 0;
  padding: var(--space-6) var(--space-8);
  background: var(--color-primary-soft);
  border: 1px solid rgba(10,138,138,0.2);
  border-radius: var(--radius-lg);
  text-align: center;
}

.article-cta__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.article-cta__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.article-cta .btn {
  display: inline-flex;
}

/* Related articles */
.related-articles {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.related-articles__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-6);
}

.related-articles__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.related-card {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow var(--transition-interactive);
}

.related-card:hover {
  box-shadow: var(--shadow-md);
}

.related-card__cluster {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.related-card__title {
  font-weight: 600;
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  line-height: 1.4;
}

/* ── About/Author Page ── */
.about-hero {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: var(--space-16) var(--space-4) var(--space-8);
}

.about-hero__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.about-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
}

.about-content {
  max-width: var(--content-narrow);
  margin: 0 auto;
  padding: 0 var(--space-4) var(--space-16);
}

.about-content p {
  font-size: var(--text-base);
  line-height: 1.85;
  margin-bottom: var(--space-5);
  color: var(--color-text-muted);
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

.about-products {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
  margin-bottom: var(--space-8);
}

.about-product-card {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.about-product-card__name {
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.about-product-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding: var(--space-4) 0 0;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb__sep {
  color: var(--color-text-faint);
}

/* Pillar link list in articles */
.pillar-links {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 var(--space-6);
}

.pillar-links li {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}

.pillar-links a {
  color: var(--color-primary);
  font-weight: 500;
}

.pillar-links a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .author-box {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .article-cta {
    padding: var(--space-5);
  }
  .about-products {
    grid-template-columns: 1fr;
  }
}