/* ── MD3 Design Tokens ─────────────────────────────────────────────────── */
:root {
  --md-primary:           #6750A4;
  --md-on-primary:        #FFFFFF;
  --md-primary-container: #EADDFF;
  --md-on-primary-container: #21005D;
  --md-secondary:         #625B71;
  --md-secondary-container: #E8DEF8;
  --md-on-secondary-container: #1D192B;
  --md-tertiary:          #7D5260;
  --md-tertiary-container:#FFD8E4;
  --md-surface:           #FFFBFE;
  --md-surface-variant:   #E7E0EC;
  --md-on-surface:        #1C1B1F;
  --md-on-surface-variant:#49454F;
  --md-outline:           #79747E;
  --md-outline-variant:   #CAC4D0;
  --md-background:        #FFFBFE;
  --md-inverse-surface:   #313033;
  --md-inverse-on-surface:#F4EFF4;
  --md-error:             #B3261E;

  --md-elevation-1: 0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.10);
  --md-elevation-2: 0 1px 2px rgba(0,0,0,.06), 0 2px 6px rgba(0,0,0,.12);
  --md-elevation-3: 0 4px 8px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);

  /* Material 3 Expressive — larger, rounder corners */
  --md-shape-xs:   8px;
  --md-shape-sm:   12px;
  --md-shape-md:   16px;
  --md-shape-lg:   20px;
  --md-shape-xl:   32px;
  --md-shape-full: 9999px;

  --font-display: 'Google Sans Display', 'Google Sans', sans-serif;
  --font-body:    'Google Sans Text', 'Google Sans', sans-serif;

  --anim-std:     cubic-bezier(0.2, 0, 0, 1);
  --anim-decel:   cubic-bezier(0, 0, 0, 1);
  --anim-accel:   cubic-bezier(0.3, 0, 1, 1);
  --anim-spring:  cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset & Base ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--md-background);
  color: var(--md-on-surface);
  overflow-x: hidden;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── Scrollbar ─────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--md-surface-variant); }
::-webkit-scrollbar-thumb { background: var(--md-primary); border-radius: 999px; }

/* ── Utility ───────────────────────────────────────────────────────────── */
.material-icons-round { vertical-align: middle; line-height: 1; }

/* ── Ripple ────────────────────────────────────────────────────────────── */
.ripple {
  position: relative; overflow: hidden; cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.ripple::after {
  content: ''; position: absolute; inset: 0;
  background: currentColor; opacity: 0;
  border-radius: inherit;
  transition: opacity 0.3s;
  pointer-events: none;
}
.ripple:hover::after { opacity: 0.08; }
.ripple:active::after { opacity: 0.12; }

/* ── Navigation Bar ────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--md-nav-bg, rgba(255,251,254,0.85));
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--md-outline-variant);
  transition: box-shadow 0.3s var(--anim-std), background 0.3s;
}
.nav.scrolled {
  box-shadow: var(--md-elevation-2);
  background: var(--md-nav-bg-scrolled, rgba(255,251,254,0.97));
}
.nav-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 64px;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 1.25rem; font-weight: 700;
  color: var(--md-on-surface);
}
.nav-brand img { width: 36px; height: 36px; border-radius: var(--md-shape-sm); }
.nav-links {
  display: flex; align-items: center; gap: 8px;
  list-style: none;
}
.nav-links a {
  padding: 8px 16px; border-radius: var(--md-shape-full);
  font-size: 0.9rem; font-weight: 500;
  color: var(--md-on-surface-variant);
  transition: background 0.2s var(--anim-std), color 0.2s;
}
.nav-links a:hover { background: var(--md-surface-variant); color: var(--md-on-surface); }
.nav-cta {
  display: flex; align-items: center; gap: 8px;
  background: var(--md-primary); color: var(--md-on-primary);
  padding: 10px 20px; border-radius: var(--md-shape-full);
  font-size: 0.875rem; font-weight: 600;
  transition: box-shadow 0.2s var(--anim-std), transform 0.2s var(--anim-spring);
  border: none;
}
.nav-cta:hover {
  box-shadow: 0 4px 12px rgba(103,80,164,0.4);
  transform: translateY(-1px);
}
.nav-cta:active { transform: scale(0.97); }
.nav-hamburger {
  display: none; background: none; border: none; cursor: pointer;
  padding: 8px; border-radius: var(--md-shape-sm);
  color: var(--md-on-surface);
}
.nav-mobile-menu {
  display: none; flex-direction: column; gap: 4px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--md-outline-variant);
}
.nav-mobile-menu a {
  padding: 12px 16px; border-radius: var(--md-shape-md);
  font-size: 1rem; font-weight: 500;
  color: var(--md-on-surface-variant);
  transition: background 0.2s;
}
.nav-mobile-menu a:hover { background: var(--md-surface-variant); }
.nav-mobile-menu .nav-cta { justify-content: center; }
@media (max-width: 768px) {
  .nav-links, .nav-inner > .nav-cta { display: none; }
  .nav-hamburger { display: flex; align-items: center; }
  .nav-mobile-menu .nav-cta { display: flex; }
  .nav-mobile-menu.open { display: flex; }
}

/* ── Hero ──────────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding: 120px 24px 80px;
  position: relative; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(103,80,164,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 60% at 20% 80%, rgba(125,82,96,0.08) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 90% 10%, rgba(98,91,113,0.06) 0%, transparent 40%);
}
.hero-particles {
  position: absolute; inset: 0; z-index: 0; overflow: hidden;
}
.particle {
  position: absolute;
  width: 4px; height: 4px;
  background: var(--md-primary);
  border-radius: 50%;
  opacity: 0;
  animation: floatUp var(--duration, 8s) var(--delay, 0s) infinite var(--anim-std);
}
@keyframes floatUp {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.3; }
  90% { opacity: 0.15; }
  100% { transform: translateY(-20vh) scale(1.5); opacity: 0; }
}
.hero-inner {
  max-width: 1280px; margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  position: relative; z-index: 1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  padding: 6px 14px; border-radius: var(--md-shape-full);
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.02em;
  margin-bottom: 20px;
  animation: slideInLeft 0.7s var(--anim-decel) 0.1s both;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700; line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--md-on-surface);
  margin-bottom: 24px;
  animation: slideInLeft 0.7s var(--anim-decel) 0.2s both;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--md-primary), var(--md-tertiary));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem; line-height: 1.7;
  color: var(--md-on-surface-variant);
  margin-bottom: 40px; max-width: 480px;
  animation: slideInLeft 0.7s var(--anim-decel) 0.3s both;
}
.hero-actions {
  display: flex; align-items: center; flex-wrap: wrap; gap: 16px;
  animation: slideInLeft 0.7s var(--anim-decel) 0.4s both;
}
.btn-filled {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--md-primary); color: var(--md-on-primary);
  padding: 14px 24px; border-radius: var(--md-shape-full);
  font-size: 0.95rem; font-weight: 600;
  border: none; cursor: pointer;
  transition: box-shadow 0.25s var(--anim-std), transform 0.2s var(--anim-spring);
  box-shadow: var(--md-elevation-2);
}
.btn-filled:hover {
  box-shadow: 0 6px 20px rgba(103,80,164,0.45);
  transform: translateY(-2px);
}
.btn-filled:active { transform: scale(0.97); }
.btn-tonal {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--md-secondary-container); color: var(--md-on-secondary-container);
  padding: 14px 24px; border-radius: var(--md-shape-full);
  font-size: 0.95rem; font-weight: 600;
  border: none; cursor: pointer;
  transition: box-shadow 0.25s var(--anim-std), transform 0.2s var(--anim-spring);
}
.btn-tonal:hover { box-shadow: var(--md-elevation-2); transform: translateY(-2px); }
.btn-tonal:active { transform: scale(0.97); }
.btn-text {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--md-primary);
  padding: 14px 8px; border-radius: var(--md-shape-full);
  font-size: 0.95rem; font-weight: 600;
  background: none; border: none; cursor: pointer;
  transition: opacity 0.2s;
}
.btn-text:hover { opacity: 0.8; }

/* Hero visual */
.hero-visual {
  display: flex; justify-content: center; align-items: center;
  animation: slideInRight 0.8s var(--anim-decel) 0.3s both;
  position: relative;
}
.hero-phone-wrap {
  position: relative; display: inline-block;
}
.hero-glow {
  position: absolute; inset: -40px;
  background: radial-gradient(circle, rgba(103,80,164,0.2) 0%, transparent 70%);
  animation: glowPulse 3s ease-in-out infinite;
  border-radius: 50%; z-index: 0;
}
@keyframes glowPulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.08); }
}
.hero-phone {
  position: relative; z-index: 1;
  width: 280px; height: auto;
  background: var(--md-surface);
  border-radius: 32px;
  padding: 32px 24px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.18), 0 8px 24px rgba(0,0,0,0.10);
  border: 1px solid var(--md-outline-variant);
  overflow: hidden;
}
.hero-phone::before {
  content: '';
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 80px; height: 6px; margin-top: 10px;
  background: var(--md-on-surface); border-radius: 999px; opacity: 0.15;
}
.phone-status-bar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px; padding-top: 8px;
  font-size: 0.7rem; font-weight: 600;
  color: var(--md-on-surface-variant);
}
.phone-app-name {
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 700;
  text-align: center; margin-bottom: 24px;
  color: var(--md-on-surface);
}
.phone-connect-btn {
  width: 120px; height: 120px; border-radius: 50%;
  background: var(--md-primary);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 8px 24px rgba(103,80,164,0.4);
  animation: connectPulse 2.5s ease-in-out infinite;
  color: var(--md-on-primary);
  gap: 4px;
}
@keyframes connectPulse {
  0%, 100% { box-shadow: 0 8px 24px rgba(103,80,164,0.4); }
  50% { box-shadow: 0 8px 40px rgba(103,80,164,0.7); }
}
.phone-connect-btn .material-icons-round { font-size: 40px; }
.phone-connect-label { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.05em; }
.phone-status {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  font-size: 0.8rem; font-weight: 500;
  color: var(--md-on-surface-variant); margin-bottom: 20px;
}
.phone-status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #4CAF50;
  animation: statusBlink 2s ease-in-out infinite;
}
@keyframes statusBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.phone-stats {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.phone-stat-card {
  background: var(--md-surface-variant);
  border-radius: var(--md-shape-md);
  padding: 10px 12px;
  text-align: center;
}
.phone-stat-value {
  font-family: var(--font-display);
  font-size: 0.95rem; font-weight: 700;
  color: var(--md-primary);
}
.phone-stat-label {
  font-size: 0.65rem;
  color: var(--md-on-surface-variant); margin-top: 2px;
}
.hero-orbit {
  position: absolute; z-index: 0;
}
.orbit-ring {
  border: 1px solid rgba(103,80,164,0.15);
  border-radius: 50%;
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
}
.orbit-1 { width: 340px; height: 340px; animation: rotateOrbit 20s linear infinite; }
.orbit-2 { width: 450px; height: 450px; animation: rotateOrbit 30s linear infinite reverse; }
@keyframes rotateOrbit { to { transform: translate(-50%, -50%) rotate(360deg); } }
.orbit-dot {
  position: absolute; width: 8px; height: 8px;
  background: var(--md-primary); border-radius: 50%;
  top: -4px; left: 50%; margin-left: -4px;
  opacity: 0.6;
}

/* ── Sections Base ─────────────────────────────────────────────────────── */
section { padding: 80px 24px; }
.section-inner { max-width: 1280px; margin: 0 auto; }
.section-label {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--md-primary); font-size: 0.85rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.75rem);
  font-weight: 700; line-height: 1.2; letter-spacing: -0.01em;
  color: var(--md-on-surface); margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem; color: var(--md-on-surface-variant);
  max-width: 600px; line-height: 1.7; margin-bottom: 48px;
}

/* ── Features ──────────────────────────────────────────────────────────── */
.features-bg {
  background:
    linear-gradient(180deg, var(--md-background) 0%, rgba(103,80,164,0.04) 50%, var(--md-background) 100%);
}
.features-header { text-align: center; }
.features-header .section-desc { margin-left: auto; margin-right: auto; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.feature-card {
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-xl);
  padding: 28px;
  transition: transform 0.3s var(--anim-spring), box-shadow 0.3s var(--anim-std), border-color 0.3s;
  opacity: 0; transform: translateY(30px);
}
.feature-card.visible {
  animation: fadeUp 0.6s var(--anim-decel) both;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--md-elevation-3);
  border-color: var(--md-primary);
}
.feature-icon {
  width: 52px; height: 52px;
  background: var(--md-primary-container);
  border-radius: var(--md-shape-lg);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: var(--md-on-primary-container);
  transition: transform 0.3s var(--anim-spring);
}
.feature-icon .material-icons-round { font-size: 26px; }
.feature-card:hover .feature-icon { transform: scale(1.1) rotate(-5deg); }
.feature-title {
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 700;
  color: var(--md-on-surface); margin-bottom: 8px;
}
.feature-desc {
  font-size: 0.9rem; color: var(--md-on-surface-variant); line-height: 1.65;
}

/* ── Protocols ─────────────────────────────────────────────────────────── */
.protocols-section {
  background: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
}
.protocols-section .section-title { color: var(--md-inverse-on-surface); }
.protocols-section .section-label { color: #D0BCFF; }
.protocols-section .section-desc { color: rgba(244,239,244,0.7); }
.protocols-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
}
.protocols-list {
  display: flex; flex-wrap: wrap; gap: 10px;
}
.protocol-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--md-shape-full);
  padding: 8px 16px;
  font-size: 0.875rem; font-weight: 600;
  color: var(--md-inverse-on-surface);
  transition: background 0.2s, transform 0.2s var(--anim-spring), border-color 0.2s;
  cursor: default;
}
.protocol-chip:hover {
  background: rgba(208,188,255,0.2);
  border-color: rgba(208,188,255,0.4);
  transform: translateY(-2px);
}
.protocol-chip .material-icons-round { font-size: 16px; color: #D0BCFF; }
.protocols-visual {
  position: relative; min-height: 300px;
  display: flex; align-items: center; justify-content: center;
}
.protocol-diagram {
  position: relative; width: 280px; height: 280px;
}
.proto-center {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 80px; height: 80px;
  background: var(--md-primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--md-on-primary);
  box-shadow: 0 0 40px rgba(103,80,164,0.6);
  z-index: 2;
}
.proto-center .material-icons-round { font-size: 36px; }
.proto-node {
  position: absolute; width: 48px; height: 48px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--md-shape-md);
  display: flex; align-items: center; justify-content: center;
  color: #D0BCFF;
  animation: orbitFloat var(--dur, 4s) var(--del, 0s) ease-in-out infinite;
}
.proto-node .material-icons-round { font-size: 20px; }
@keyframes orbitFloat {
  0%, 100% { transform: translate(var(--tx, 0), var(--ty, 0)) translateY(0); }
  50% { transform: translate(var(--tx, 0), var(--ty, 0)) translateY(-8px); }
}
.proto-line {
  position: absolute; background: rgba(208,188,255,0.2);
  transform-origin: 0 0;
}

/* ── Screenshots / App Screens ─────────────────────────────────────────── */
.screens-section { background: var(--md-background); }
.screens-header { text-align: center; margin-bottom: 48px; }
.screens-header .section-desc { margin-left: auto; margin-right: auto; }
.screens-scroll-wrap { overflow: hidden; position: relative; }
.screens-track {
  display: flex; gap: 20px;
  padding: 16px 0 32px;
  animation: scrollTrack 25s linear infinite;
  width: max-content;
}
.screens-track:hover { animation-play-state: paused; }
@keyframes scrollTrack {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.screen-card {
  flex-shrink: 0;
  width: 220px;
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: 24px;
  padding: 20px 16px;
  box-shadow: var(--md-elevation-1);
  transition: transform 0.3s var(--anim-spring), box-shadow 0.3s;
}
.screen-card:hover { transform: translateY(-6px); box-shadow: var(--md-elevation-3); }
.screen-title {
  font-family: var(--font-display);
  font-size: 0.85rem; font-weight: 700;
  color: var(--md-on-surface); margin-bottom: 12px; text-align: center;
}
.screen-mock {
  background: var(--md-surface-variant);
  border-radius: 16px; padding: 16px;
  min-height: 220px;
  display: flex; flex-direction: column; gap: 8px; align-items: center;
  justify-content: center;
}
.mock-circle {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--md-primary);
  display: flex; align-items: center; justify-content: center;
  color: var(--md-on-primary);
  box-shadow: 0 4px 16px rgba(103,80,164,0.4);
  margin-bottom: 8px;
}
.mock-bar {
  height: 8px; border-radius: 999px;
  background: var(--md-outline-variant);
  width: 100%;
}
.mock-bar.accent { background: var(--md-primary); width: 60%; }
.mock-bar.sm { width: 80%; height: 6px; }
.mock-chips { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.mock-chip-sm {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-size: 0.6rem; font-weight: 600;
  padding: 3px 8px; border-radius: 999px;
}
.mock-list-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  background: var(--md-surface); border-radius: var(--md-shape-sm); padding: 8px;
}
.mock-list-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--md-primary); flex-shrink: 0; }
.mock-list-text { flex: 1; height: 6px; background: var(--md-outline-variant); border-radius: 999px; }
.mock-toggle {
  width: 40px; height: 22px; background: var(--md-primary);
  border-radius: 999px; position: relative;
}
.mock-toggle::after {
  content: ''; position: absolute; right: 3px; top: 3px;
  width: 16px; height: 16px; background: white; border-radius: 50%;
}

/* ── Tech Stack ─────────────────────────────────────────────────────────── */
.tech-section { background: var(--md-surface-variant); }
.tech-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}
.tech-card {
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-lg);
  padding: 20px 16px;
  text-align: center;
  transition: transform 0.25s var(--anim-spring), box-shadow 0.25s;
  opacity: 0; transform: scale(0.9);
}
.tech-card.visible { animation: scaleIn 0.5s var(--anim-spring) both; }
.tech-card:hover { transform: translateY(-3px); box-shadow: var(--md-elevation-2); }
.tech-icon {
  font-size: 2rem; margin-bottom: 10px;
  display: block;
}
.tech-name {
  font-family: var(--font-display);
  font-size: 0.875rem; font-weight: 700;
  color: var(--md-on-surface);
}
.tech-role {
  font-size: 0.75rem; color: var(--md-on-surface-variant); margin-top: 4px;
}

/* ── Permissions ─────────────────────────────────────────────────────────── */
.permissions-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px;
}
.perm-item {
  display: flex; align-items: flex-start; gap: 16px;
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-lg); padding: 20px;
  transition: border-color 0.2s;
}
.perm-item:hover { border-color: var(--md-primary); }
.perm-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: var(--md-tertiary-container);
  border-radius: var(--md-shape-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--md-tertiary);
}
.perm-icon .material-icons-round { font-size: 22px; }
.perm-name {
  font-size: 0.9rem; font-weight: 700; color: var(--md-on-surface); margin-bottom: 4px;
}
.perm-desc { font-size: 0.8rem; color: var(--md-on-surface-variant); line-height: 1.5; }

/* ── Download ───────────────────────────────────────────────────────────── */
.download-section {
  text-align: center;
  background: linear-gradient(135deg, var(--md-primary-container) 0%, var(--md-tertiary-container) 100%);
}
.download-section .section-title { color: var(--md-on-primary-container); }
.download-section .section-desc { color: var(--md-on-surface-variant); margin-left: auto; margin-right: auto; }
.download-section .section-label { color: var(--md-primary); }
.download-cards {
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: center;
  margin-top: 48px;
}
.download-card {
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-xl);
  padding: 32px 40px;
  text-align: center;
  min-width: 240px;
  transition: transform 0.3s var(--anim-spring), box-shadow 0.3s;
}
.download-card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,0,0,0.15); }
.download-card-icon {
  font-size: 3rem; margin-bottom: 16px; display: block;
}
.download-card-title {
  font-family: var(--font-display);
  font-size: 1.2rem; font-weight: 700; margin-bottom: 8px;
  color: var(--md-on-surface);
}
.download-card-desc {
  font-size: 0.875rem; color: var(--md-on-surface-variant); margin-bottom: 24px;
}
.download-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  padding: 4px 10px; border-radius: 999px;
  font-size: 0.75rem; font-weight: 600; margin-bottom: 20px;
}
.build-steps {
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-xl);
  padding: 32px;
  margin-top: 40px;
  max-width: 680px; margin-left: auto; margin-right: auto;
  text-align: left;
}
.build-steps h3 {
  font-family: var(--font-display);
  font-size: 1.1rem; font-weight: 700;
  color: var(--md-on-surface); margin-bottom: 20px;
  display: flex; align-items: center; gap: 8px;
}
.build-step {
  display: flex; gap: 16px; align-items: flex-start;
  margin-bottom: 16px;
}
.build-step:last-child { margin-bottom: 0; }
.step-num {
  width: 28px; height: 28px; flex-shrink: 0;
  background: var(--md-primary); color: var(--md-on-primary);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700;
}
.step-text { font-size: 0.9rem; color: var(--md-on-surface-variant); line-height: 1.5; padding-top: 4px; }
.step-text strong { color: var(--md-on-surface); }
code {
  background: var(--md-surface-variant);
  padding: 2px 6px; border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.85em;
  color: var(--md-primary);
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.footer {
  background: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
  padding: 48px 24px 32px;
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 40px;
}
.footer-brand img { width: 48px; height: 48px; border-radius: var(--md-shape-md); margin-bottom: 12px; }
.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1.25rem; font-weight: 700; margin-bottom: 8px;
}
.footer-brand-desc { font-size: 0.875rem; opacity: 0.7; line-height: 1.6; }
.footer-heading {
  font-family: var(--font-display);
  font-size: 0.875rem; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
  opacity: 0.5; margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
  font-size: 0.9rem; opacity: 0.7;
  display: flex; align-items: center; gap: 6px;
  transition: opacity 0.2s, transform 0.2s;
}
.footer-links a:hover { opacity: 1; transform: translateX(4px); }
.footer-divider {
  border: none; border-top: 1px solid rgba(255,255,255,0.1);
  margin: 40px 0 24px;
}
.footer-bottom {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-copy { font-size: 0.8rem; opacity: 0.5; }
.footer-license {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 6px 14px; border-radius: 999px;
  font-size: 0.8rem; opacity: 0.7;
}

/* ── Animations ─────────────────────────────────────────────────────────── */
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-visual { order: -1; }
  .protocols-inner { grid-template-columns: 1fr; gap: 48px; }
  .protocols-visual { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  section { padding: 64px 16px; }
  .hero { padding: 100px 16px 64px; }
  .hero-phone { width: 240px; }
  .features-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .download-cards { flex-direction: column; align-items: center; }
  .download-card { width: 100%; max-width: 320px; }
  .orbit-1, .orbit-2 { display: none; }
}

/* ── Dark Theme ────────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --md-primary:           #D0BCFF;
  --md-on-primary:        #381E72;
  --md-primary-container: #4F378B;
  --md-on-primary-container: #EADDFF;
  --md-secondary:         #CCC2DC;
  --md-secondary-container: #4A4458;
  --md-on-secondary-container: #E8DEF8;
  --md-tertiary:          #EFB8C8;
  --md-tertiary-container:#633B48;
  --md-surface:           #1C1B1F;
  --md-surface-variant:   #49454F;
  --md-on-surface:        #E6E1E5;
  --md-on-surface-variant:#CAC4D0;
  --md-outline:           #938F99;
  --md-outline-variant:   #49454F;
  --md-background:        #1C1B1F;
  --md-inverse-surface:   #E6E1E5;
  --md-inverse-on-surface:#313033;
  --md-error:             #F2B8B5;
}

[data-theme="dark"] .nav {
  background: rgba(28,27,31,0.85) !important;
}
[data-theme="dark"] .nav.scrolled {
  background: rgba(28,27,31,0.97) !important;
}
[data-theme="dark"] .protocols-section {
  background: #2D2B32;
}

/* ── Theme Toggle Button ─────────────────────────────────────────────────── */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border-radius: var(--md-shape-full);
  background: var(--md-surface-variant);
  border: none; cursor: pointer;
  color: var(--md-on-surface-variant);
  transition: background 0.2s var(--anim-std), transform 0.2s var(--anim-spring);
  flex-shrink: 0;
}
.theme-toggle:hover { background: var(--md-outline-variant); transform: scale(1.05); }
.theme-toggle .material-icons-round { font-size: 20px; }