/* ============================================================
   ORBA LABS — Premium Design System
   Ultra-minimal · Luxury Editorial · Swiss Typography
   ============================================================ */

:root {
  --bg:             #FCFCFA;
  --text-primary:   #1A1A1A;
  --text-secondary: #6F6F6F;
  --text-tertiary:  #999999;
  --border:         #ECECEC;
  --divider:        #EFEFEF;
  --card:           #FFFFFF;
  --accent:         #1A1A1A;
  --accent-soft:    rgba(26, 26, 26, 0.04);
  --hover-bg:       #F7F7F5;
  --black:          #1A1A1A;
  --white:          #FFFFFF;

  --font-serif: 'DM Serif Display', Georgia, serif;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-display: clamp(3rem, 5.5vw, 4.75rem);
  --text-h2:      clamp(2rem, 3.5vw, 3rem);
  --text-h3:      clamp(1.35rem, 2vw, 1.625rem);
  --text-h4:      1.25rem;
  --text-body-lg: 1.1875rem;
  --text-body:    1.0625rem;
  --text-small:   0.9375rem;
  --text-caption: 0.8125rem;
  --text-label:   0.75rem;

  --max-width: 1280px;
  --gutter:    clamp(24px, 5vw, 80px);
  --radius:    12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 200ms;
  --duration:      400ms;
  --duration-slow: 800ms;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg);
  overflow-x: hidden;
}

/* Paper grain */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10000;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::selection { background: rgba(61,90,254,0.12); color: var(--text-primary); }

/* ---- Typography ---- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--text-display); line-height: 1.05; letter-spacing: -0.02em; }
h2 { font-size: var(--text-h2); line-height: 1.15; letter-spacing: -0.015em; }
h3 { font-size: var(--text-h3); line-height: 1.3; }
h4 { font-size: var(--text-h4); line-height: 1.35; }
p  { max-width: 640px; }

.section-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 24px;
}

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: 128px 0;
}

.section-header {
  margin-bottom: 80px;
}

.section-header p {
  margin-top: 24px;
  font-size: var(--text-body-lg);
  line-height: 1.75;
}

.section-header--center {
  text-align: center;
}

.section-header--center p {
  margin-left: auto;
  margin-right: auto;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--divider);
  border: none;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-sans);
  font-size: var(--text-small);
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--black);
  color: var(--white);
  border: 1.5px solid var(--black);
}
.btn-primary:hover {
  background: #333;
  border-color: #333;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover {
  background: var(--hover-bg);
  border-color: #DADADA;
}

.btn-sm {
  padding: 10px 22px;
  font-size: var(--text-caption);
}

.btn-accent {
  background: var(--black);
  color: var(--white);
  border: 1.5px solid var(--black);
}
.btn-accent:hover {
  background: #333;
  border-color: #333;
  transform: translateY(-1px);
}

.btn-icon {
  width: 16px;
  height: 16px;
}

/* ---- Cards ---- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: all var(--duration) var(--ease-out);
}
.card:hover {
  border-color: #DADADA;
}
.card h3 { margin-bottom: 12px; }
.card h4 { margin-bottom: 12px; }
.card p  { font-size: var(--text-small); line-height: 1.7; }

.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--divider);
  margin-bottom: 24px;
  color: var(--text-primary);
}
.card-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}


/* ===========================================================
   NAVIGATION
   =========================================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--duration) var(--ease-out);
}
.nav--scrolled {
  background: rgba(252,252,250,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--divider);
  padding: 16px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.nav-logo-mark {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  overflow: hidden;
}
.nav-logo-mark svg { width: 28px; height: 28px; }
.logo-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 50%;
  display: block;
}
.nav-logo-labs {
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(26,26,26,0.2);
  border-radius: 4px;
  padding: 2px 5px;
  line-height: 1;
  margin-left: 2px;
  position: relative;
  top: -1px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-links a {
  font-size: var(--text-caption);
  font-weight: 450;
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  letter-spacing: 0.005em;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-actions { display: flex; align-items: center; gap: 16px; }

.nav-mobile-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
}
.nav-mobile-toggle span {
  display: block; width: 18px; height: 1.5px;
  background: var(--text-primary); position: relative;
  transition: all var(--duration-fast) var(--ease-out);
}
.nav-mobile-toggle span::before,
.nav-mobile-toggle span::after {
  content: ''; position: absolute; width: 100%; height: 100%;
  background: var(--text-primary); left: 0;
  transition: all var(--duration-fast) var(--ease-out);
}
.nav-mobile-toggle span::before { top: -6px; }
.nav-mobile-toggle span::after  { top: 6px; }


/* ===========================================================
   HERO
   =========================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-content { position: relative; z-index: 2; }
.hero h1 { margin-bottom: 32px; }

.hero h1 .accent { color: var(--accent); }

.hero-subtitle {
  font-size: var(--text-body-lg);
  line-height: 1.75;
  max-width: 480px;
  margin-bottom: 48px;
}
.hero-cta { display: flex; gap: 16px; align-items: center; margin-bottom: 48px; }
.hero-tags {
  display: flex;
  gap: 12px;
}
.hero-tag {
  padding: 8px 20px;
  font-size: var(--text-caption);
  font-weight: 450;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 100px;
  transition: all var(--duration-fast) var(--ease-out);
}
.hero-tag:hover {
  border-color: #DADADA;
  background: var(--hover-bg);
}
.hero-visual {
  position: relative;
  width: 100%;
  height: 520px;
}
#hero-canvas { width: 100%; height: 100%; }


/* ===========================================================
   APPROACH (3 Pillars)
   =========================================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pillar-card {
  padding: 48px 40px;
}
.pillar-number {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 32px;
  display: block;
}
.pillar-title {
  font-family: var(--font-sans);
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}


/* ===========================================================
   ABOUT (2x2 Grid)
   =========================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.about-header {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 80px;
  align-items: start;
  margin-bottom: 80px;
}
.about-header-text {
  font-size: var(--text-body-lg);
  line-height: 1.8;
  margin-top: 32px;
}
.about-card {
  padding: 48px;
}
.about-card h4 {
  font-family: var(--font-serif);
  margin-bottom: 16px;
}
.about-card p {
  font-size: var(--text-small);
  line-height: 1.75;
}


/* ===========================================================
   VISION (5 items)
   =========================================================== */
.vision-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.vision-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  padding: 40px 0;
  border-bottom: 1px solid var(--divider);
  align-items: start;
  transition: background var(--duration-fast) var(--ease-out);
}
.vision-item:first-child { border-top: 1px solid var(--divider); }
.vision-item:hover { background: var(--hover-bg); margin: 0 -24px; padding: 40px 24px; }
.vision-item h4 {
  font-family: var(--font-serif);
  font-size: var(--text-h4);
  color: var(--text-primary);
}
.vision-item p {
  font-size: var(--text-small);
  line-height: 1.75;
}


/* ===========================================================
   WHAT WE BUILD (2x2 Cards)
   =========================================================== */
.build-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.build-card {
  padding: 48px;
}
.build-card .card-icon { margin-bottom: 28px; }
.build-card h3 { margin-bottom: 12px; }


/* ===========================================================
   GET APP (3 Download Options)
   =========================================================== */
.app-section {
  padding: 128px 0;
}
.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px 6px 10px;
  background: var(--accent-soft);
  border: 1px solid rgba(26,26,26,0.12);
  border-radius: 100px;
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 24px;
}
.app-badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #3DDC84;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.store-badges-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin: 40px auto 0;
  max-width: 900px;
}

.store-badge {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  min-width: 240px;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: default;
  text-decoration: none;
  color: inherit;
}

.store-badge--active {
  background: var(--card);
  border-color: #DADADA;
  cursor: pointer;
}
.store-badge--active:hover {
  border-color: var(--black);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.store-badge--disabled {
  background: #F9F9F7;
  border-color: var(--border);
  opacity: 0.85;
}

.store-badge-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.store-badge-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  text-align: left;
  flex-grow: 1;
}

.store-badge-sub {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.store-badge-title {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.store-badge-action {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--black);
  color: var(--white);
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--ease-out);
}
.store-badge--active:hover .store-badge-action {
  transform: translateY(1px);
}

.download-arrow-icon {
  width: 14px;
  height: 14px;
}

.store-badge-pill {
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 3px 9px;
  border-radius: 100px;
  background: rgba(26,26,26,0.05);
  color: var(--text-tertiary);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.app-features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.app-feature-card {
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration-fast) var(--ease-out);
}
.app-feature-card:hover { border-color: #DADADA; }
.app-feature-card h4 {
  font-family: var(--font-sans);
  font-size: var(--text-small);
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.app-feature-card p {
  font-size: var(--text-caption);
  line-height: 1.6;
}
.app-sidebar-header {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--divider);
  margin-bottom: 32px;
}
.app-sidebar-header h3 {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.app-sidebar-header p {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
}
.app-sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--divider);
  font-size: var(--text-small);
  font-weight: 450;
  color: var(--text-primary);
  transition: color var(--duration-fast) var(--ease-out);
}
.app-sidebar-link:last-child { border-bottom: none; }
.app-sidebar-link:hover { color: var(--accent); }
.app-sidebar-link svg {
  width: 16px; height: 16px;
  stroke: var(--text-tertiary);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}
.app-sidebar-note {
  margin-top: 24px;
  font-size: var(--text-caption);
  color: var(--text-tertiary);
  font-style: italic;
}


/* ===========================================================
   ROADMAP
   =========================================================== */
.roadmap-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
}
.roadmap-intro p {
  margin-top: 24px;
  font-size: var(--text-body-lg);
  line-height: 1.8;
  max-width: 400px;
}
.roadmap-timeline {
  position: relative;
  padding-left: 48px;
}
.roadmap-timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: var(--divider);
}
.roadmap-item {
  position: relative;
  padding-bottom: 48px;
}
.roadmap-item:last-child { padding-bottom: 0; }
.roadmap-item::before {
  content: '';
  position: absolute;
  left: -48px; top: 8px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--border);
  transform: translateX(-3px);
}
.roadmap-item--active::before {
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.roadmap-stage {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}
.roadmap-item h4 {
  font-family: var(--font-serif);
  margin-bottom: 12px;
}
.roadmap-item p {
  font-size: var(--text-small);
  line-height: 1.75;
  max-width: 520px;
}


/* ===========================================================
   PRINCIPLES (4 cards)
   =========================================================== */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.principle-card {
  padding: 40px 32px;
  text-align: left;
}
.principle-number {
  font-family: var(--font-sans);
  font-size: var(--text-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 28px;
  display: block;
}
.principle-card .card-icon { margin-bottom: 24px; }
.principle-card h4 { font-family: var(--font-serif); margin-bottom: 12px; }


/* ===========================================================
   CONTACT
   =========================================================== */
.contact-inner {
  text-align: center;
  max-width: 580px;
  margin: 0 auto;
}
.contact-inner h2 { margin-bottom: 24px; }
.contact-inner > p {
  font-size: var(--text-body-lg);
  line-height: 1.75;
  margin: 0 auto 48px;
}
.contact-email-block {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.contact-email-label {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.contact-email {
  font-family: var(--font-serif);
  font-size: var(--text-h3);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.contact-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}


/* ===========================================================
   FOOTER
   =========================================================== */
.footer {
  padding: 80px 0 48px;
  border-top: 1px solid var(--divider);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
}
.footer-brand { max-width: 300px; }
.footer-brand .nav-logo { margin-bottom: 20px; }
.footer-brand p {
  font-size: var(--text-caption);
  line-height: 1.7;
  color: var(--text-tertiary);
}
.footer-col h5 {
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
}
.footer-col a:hover { color: var(--text-primary); }

.footer-social-icons {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
}
.footer-social-icons a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}
.footer-social-icons a:hover {
  color: var(--text-primary);
  border-color: #DADADA;
  background: var(--hover-bg);
  transform: translateY(-1px);
}
.footer-social-icons svg {
  width: 15px;
  height: 15px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 48px;
  margin-top: 64px;
  border-top: 1px solid var(--divider);
}
.footer-bottom p {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
}
.footer-bottom-links {
  display: flex;
  gap: 24px;
}
.footer-bottom-links a {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
}
.footer-bottom-links a:hover { color: var(--text-primary); }

.footer-tagline {
  text-align: center;
  margin-top: 32px;
  font-size: var(--text-caption);
  color: var(--text-tertiary);
  font-style: italic;
}

/* ===========================================================
   MODALS (Privacy & Terms)
   =========================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(26,26,26,0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration) var(--ease-out);
}
.modal-overlay--open {
  opacity: 1;
  pointer-events: auto;
}
.modal-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 600px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
  transform: translateY(20px) scale(0.98);
  transition: transform var(--duration) var(--ease-out);
}
.modal-overlay--open .modal-card {
  transform: translateY(0) scale(1);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 32px;
  border-bottom: 1px solid var(--divider);
}
.modal-header h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
}
.modal-close {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
  padding: 4px 8px;
}
.modal-close:hover {
  color: var(--text-primary);
}
.modal-body {
  padding: 32px;
  overflow-y: auto;
}
.modal-date {
  font-size: var(--text-caption);
  color: var(--text-tertiary);
  margin-bottom: 24px;
}
.modal-body h4 {
  font-family: var(--font-sans);
  font-size: var(--text-small);
  font-weight: 600;
  margin-top: 20px;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.modal-body p {
  font-size: var(--text-small);
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-caption);
  font-weight: 450;
  color: var(--text-tertiary);
  transition: color var(--duration-fast) var(--ease-out);
  cursor: pointer;
}
.back-to-top:hover { color: var(--text-primary); }
.back-to-top svg {
  width: 14px; height: 14px;
  stroke: currentColor; fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}


/* ===========================================================
   SCROLL ANIMATIONS
   =========================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}
.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-d1 { transition-delay: 80ms; }
.reveal-d2 { transition-delay: 160ms; }
.reveal-d3 { transition-delay: 240ms; }
.reveal-d4 { transition-delay: 320ms; }
.reveal-d5 { transition-delay: 400ms; }


/* ===========================================================
   RESPONSIVE
   =========================================================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { height: 360px; }
  .pillars-grid { grid-template-columns: 1fr; }
  .about-header { grid-template-columns: 1fr; gap: 32px; }
  .about-grid { grid-template-columns: 1fr; }
  .vision-item { grid-template-columns: 160px 1fr; gap: 32px; }
  .build-grid { grid-template-columns: 1fr; }
  .app-features-grid { grid-template-columns: repeat(2, 1fr); }
  .roadmap-layout { grid-template-columns: 1fr; gap: 48px; }
  .principles-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .section-header { margin-bottom: 48px; }
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(252,252,250,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 32px 24px;
    gap: 20px;
    display: none;
    box-shadow: 0 16px 32px rgba(0,0,0,0.06);
  }
  .nav-links.nav-links--open {
    display: flex;
  }
  .nav-links a {
    font-size: 1.0625rem;
    font-weight: 500;
  }
  .nav-mobile-toggle { display: flex; }
  .nav-mobile-toggle--active span { background: transparent; }
  .nav-mobile-toggle--active span::before { transform: rotate(45deg); top: 0; }
  .nav-mobile-toggle--active span::after { transform: rotate(-45deg); top: 0; }

  .hero { min-height: auto; padding-top: 120px; padding-bottom: 64px; }
  .hero-visual { height: 260px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-tags { flex-wrap: wrap; }
  .vision-item { grid-template-columns: 1fr; gap: 8px; }
  .store-badges-container { flex-direction: column; width: 100%; }
  .store-badge { width: 100%; min-width: 0; }
  .app-features-grid { grid-template-columns: 1fr; }
  .principles-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}