/* ========================================================================
   Tab Manager v2 – Landing Page
   Clean neutral palette aligned with the extension's UI
   ======================================================================== */

/* --- Design Tokens --- */

:root {
  --bg-color: #ffffff;
  --surface: #edf0f8;
  --surface-hover: #e3e7f1;
  --text-primary: #1a1e28;
  --text-secondary: #5a6380;
  --border: #d6dce8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-soft: rgba(99, 102, 241, 0.08);
  --shadow: rgba(20, 35, 70, 0.07);
  --shadow-lg: rgba(20, 35, 70, 0.12);
  --toggle-bg: #eaeef6;
  --toggle-active: #ffffff;
  --hero-glow: rgba(99, 102, 241, 0.06);
  --card-hover-shadow: rgba(99, 102, 241, 0.1);
  --tap-target-size: 44px;
  --theme-toggle-size: 32px;
  --screenshot-shell-light: #e8edf4;
  --screenshot-shell-dark: #1e242b;
  --screenshot-shell-radius: 8px;
  --screenshot-shell-padding: 6px;
  --screenshot-image-radius: 5px;
  --font-sans:
    system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica,
    Arial, sans-serif;
}

[data-theme='dark'] {
  --bg-color: #1c2129;
  --surface: #272c36;
  --surface-hover: #303640;
  --text-primary: #eef0f6;
  --text-secondary: #8b93a4;
  --border: #343b48;
  --accent: #818cf8;
  --accent-hover: #a5b4fc;
  --accent-soft: rgba(129, 140, 248, 0.1);
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-lg: rgba(0, 0, 0, 0.45);
  --toggle-bg: #272c36;
  --toggle-active: #3e4452;
  --hero-glow: rgba(129, 140, 248, 0.08);
  --card-hover-shadow: rgba(129, 140, 248, 0.08);
}

@media (prefers-color-scheme: dark) {
  [data-theme='system'] {
    --bg-color: #1c2129;
    --surface: #272c36;
    --surface-hover: #303640;
    --text-primary: #eef0f6;
    --text-secondary: #8b93a4;
    --border: #343b48;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: rgba(129, 140, 248, 0.1);
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.45);
    --toggle-bg: #272c36;
    --toggle-active: #3e4452;
    --hero-glow: rgba(129, 140, 248, 0.08);
    --card-hover-shadow: rgba(129, 140, 248, 0.08);
  }
}

/* --- Reset & Base --- */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body.preload,
body.preload * {
  transition: none !important;
  animation: none !important;
}

body {
  overflow-x: clip;
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.65;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: 0.2s ease;
}

:where(a[href], button, summary) {
  touch-action: manipulation;
}

img {
  display: block;
  max-width: 100%;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* --- Accessibility --- */

* :focus-visible,
*:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 10px 0;
  font-weight: 600;
  transform: translateY(-120%);
  z-index: 100;
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

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

/* --- Entrance Animations --- */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Staggered children in grids */
.gallery-grid.fade-in .screenshot-frame,
.fade-in .versus-card,
.fade-in .feature-card,
.fade-in .faq-item {
  opacity: 0;
  transform: translateY(16px);
}

.gallery-grid.fade-in.visible .screenshot-frame,
.fade-in.visible .versus-card,
.fade-in.visible .feature-card,
.fade-in.visible .faq-item {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-grid.fade-in.visible .screenshot-frame:nth-child(1) {
  transition-delay: 0.04s;
}
.gallery-grid.fade-in.visible .screenshot-frame:nth-child(2) {
  transition-delay: 0.08s;
}
.gallery-grid.fade-in.visible .screenshot-frame:nth-child(3) {
  transition-delay: 0.12s;
}
.gallery-grid.fade-in.visible .screenshot-frame:nth-child(4) {
  transition-delay: 0.18s;
}
.gallery-grid.fade-in.visible .screenshot-frame:nth-child(5) {
  transition-delay: 0.24s;
}
.gallery-grid.fade-in.visible .screenshot-frame:nth-child(6) {
  transition-delay: 0.3s;
}
.gallery-grid.fade-in.visible .screenshot-frame:nth-child(7) {
  transition-delay: 0.36s;
}

.fade-in.visible .versus-card:nth-child(1),
.fade-in.visible .feature-card:nth-child(1),
.fade-in.visible .faq-item:nth-child(1) {
  transition-delay: 0.06s;
}
.fade-in.visible .versus-card:nth-child(2),
.fade-in.visible .feature-card:nth-child(2),
.fade-in.visible .faq-item:nth-child(2) {
  transition-delay: 0.12s;
}
.fade-in.visible .versus-card:nth-child(3),
.fade-in.visible .feature-card:nth-child(3),
.fade-in.visible .faq-item:nth-child(3) {
  transition-delay: 0.18s;
}
.fade-in.visible .feature-card:nth-child(4),
.fade-in.visible .faq-item:nth-child(4) {
  transition-delay: 0.24s;
}
.fade-in.visible .feature-card:nth-child(5) {
  transition-delay: 0.3s;
}
.fade-in.visible .feature-card:nth-child(6) {
  transition-delay: 0.36s;
}

/* --- Layout --- */

.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(24px, 4vw, 72px);
}

/* --- Header --- */

.site-header {
  padding: 28px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: var(--tap-target-size);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.logo img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: #fff;
  padding: 2px;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-target-size);
  padding: 0 4px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--accent);
}

/* Theme Toggle */

.theme-switch {
  display: flex;
  align-items: center;
  gap: 1px;
  padding: 2px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--toggle-bg);
  box-shadow: 0 2px 8px var(--shadow);
}

.theme-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  width: var(--theme-toggle-size);
  height: var(--theme-toggle-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
}

.theme-btn svg {
  width: 14px;
  height: 14px;
}

.theme-btn.active {
  background: var(--toggle-active);
  color: var(--text-primary);
  box-shadow: 0 1px 3px var(--shadow);
}

.theme-btn:hover:not(.active) {
  color: var(--text-primary);
}

/* --- Hero --- */

.hero {
  padding: 80px 0 48px;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  width: min(700px, 100vw);
  height: min(700px, 100vw);
  border-radius: 50%;
  background: radial-gradient(circle, var(--hero-glow) 0%, transparent 70%);
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 0;
}

.hero > h1 {
  position: relative;
  z-index: 1;
  text-align: center;
  font-family: var(--font-sans);
  font-size: clamp(3rem, 6vw, 5.2rem);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-optical-sizing: auto;
  padding-bottom: 0.08em;
  margin-bottom: 48px;
}

.text-gradient {
  background-image: linear-gradient(
    120deg,
    #6366f1 0%,
    #7a5df5 6.25%,
    #a855f7 12.5%,
    #cf50ef 18.75%,
    #ec4899 25%,
    #cf50ef 31.25%,
    #a855f7 37.5%,
    #7a5df5 43.75%,
    #6366f1 50%,
    #7a5df5 56.25%,
    #a855f7 62.5%,
    #cf50ef 68.75%,
    #ec4899 75%,
    #cf50ef 81.25%,
    #a855f7 87.5%,
    #7a5df5 93.75%,
    #6366f1 100%
  );
  background-size: 200% 100%;
  background-position: 0% 50%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  -webkit-user-select: none;
  user-select: none;
  animation: gradient-shine 8s linear infinite;
}

@keyframes gradient-shine {
  from {
    background-position: 0% 50%;
  }

  to {
    background-position: 100% 50%;
  }
}

.hero-split {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  max-width: 1120px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 680px;
  text-align: center;
  align-items: center;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.5;
}

.hero-benefit {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-note {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
}

/* CTA Buttons */

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 12px;
  justify-content: center;
}

.btn-store,
.btn-store:link,
.btn-store:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 160px;
  min-height: 48px;
  padding: 14px 20px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  box-shadow: 0 4px 16px -6px var(--shadow);
  -webkit-user-select: none;
  user-select: none;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease;
}

.btn-store:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -8px var(--card-hover-shadow);
}

.btn-store img {
  width: 24px;
  height: 24px;
}

/* Hero Screenshot Frame */

.hero-frame {
  display: block;
  width: 100%;
  max-width: 1120px;
  padding: var(--screenshot-shell-padding);
  border-radius: var(--screenshot-shell-radius);
  border: 1px solid var(--screenshot-shell-light);
  box-shadow: 0 24px 48px -16px var(--shadow-lg);
  background: var(--screenshot-shell-light);
  transition:
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.hero-frame[data-screenshot-theme='dark'] {
  background: var(--screenshot-shell-dark);
  border-color: var(--screenshot-shell-dark);
}

.hero-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top center;
  border-radius: var(--screenshot-image-radius);
}

/* --- Gallery Toolbar --- */

.gallery-toolbar {
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.gallery-toolbar-copy-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.gallery-toolbar-label,
.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.gallery-toolbar-separator {
  width: 1px;
  height: 18px;
  background: var(--border);
  border-radius: 999px;
}

.gallery-toolbar-copy {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* Screenshot Theme Toggle */

.screenshot-theme-switch {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 0 2px 8px var(--shadow);
}

.screenshot-theme-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1.15;
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.screenshot-theme-icon {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

.screenshot-theme-btn.active {
  color: var(--text-primary);
  background: var(--toggle-active);
  box-shadow: 0 1px 3px var(--shadow);
}

.screenshot-theme-btn[data-screenshot-theme='dark'].active {
  background: #272c36;
  color: #eef0f6;
}

.screenshot-theme-btn:hover:not(.active) {
  color: var(--text-primary);
  background: var(--surface-hover);
}

/* --- Gallery Grid --- */

.gallery-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 360px), 1fr));
  gap: 18px;
  align-items: start;
}

/* Screenshot Cards */

.screenshot-frame {
  display: flex;
  flex-direction: column;
  padding: var(--screenshot-shell-padding);
  border-radius: var(--screenshot-shell-radius);
  border: 1px solid var(--screenshot-shell-light);
  background: var(--screenshot-shell-light);
  box-shadow: 0 8px 24px -8px var(--shadow);
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.3s ease,
    background-color 0.3s ease;
}

.screenshot-frame[data-screenshot-theme='dark'] {
  background: var(--screenshot-shell-dark);
  border-color: var(--screenshot-shell-dark);
}

.screenshot-frame[data-screenshot-theme='dark'] .screenshot-caption {
  color: #eef0f4;
}

@media (hover: hover) {
  .screenshot-frame:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px var(--shadow-lg);
  }
}

.screenshot-frame:active {
  transform: scale(0.98);
  transition: transform 0.1s;
}

.screenshot-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top center;
  border-radius: var(--screenshot-image-radius);
}

.screenshot-caption {
  display: block;
  padding: 6px 4px 2px;
  color: var(--text-secondary);
  font-size: 0.84rem;
  font-weight: 500;
  line-height: 1.45;
}

/* --- Video Tour --- */

.video-tour-layout {
  display: grid;
  gap: 18px;
}

.video-tour-frame {
  padding: 10px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at top left, var(--hero-glow) 0%, transparent 32%),
    var(--surface);
  box-shadow: 0 20px 44px -18px var(--shadow-lg);
}

.video-tour-frame .video-js,
.scale-demo-frame .video-js,
.promo-video {
  display: block;
  width: 100%;
  height: auto;
  background: #10141d;
  box-shadow: 0 14px 32px -18px var(--shadow-lg);
}

.video-tour-frame .video-js,
.promo-video {
  aspect-ratio: 16 / 9;
}

.video-tour-frame .video-js {
  font-family: inherit;
  border-radius: 16px;
  overflow: hidden;
}

.video-tour-frame .video-js .vjs-tech,
.video-tour-frame .video-js .vjs-poster {
  border-radius: 16px;
}

.video-tour-copy {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}

.video-tour-label {
  padding-inline: 4px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.video-tour-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.video-tour-chapter {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 18px;
  min-height: 100%;
  background: var(--surface);
  padding: 12px 14px 14px;
  color: var(--text-primary);
  font: inherit;
  text-align: left;
  cursor: pointer;
  display: grid;
  align-content: start;
  gap: 6px;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease;
  box-shadow: 0 10px 24px -22px var(--shadow);
}

.video-tour-chapter:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  box-shadow: 0 12px 24px -18px var(--shadow-lg);
}

.video-tour-chapter:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.video-tour-chapter.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 14px 28px -20px var(--shadow-lg);
}

.video-tour-chapter-time {
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.video-tour-chapter-copy {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.35;
}

.scale-demo-layout {
  margin-top: 28px;
}

.scale-demo-disclosure {
  border-radius: 24px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at top right, var(--hero-glow) 0%, transparent 34%),
    var(--surface);
  box-shadow: 0 12px 28px -18px var(--shadow);
  overflow: hidden;
}

.scale-demo-summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 22px;
  cursor: pointer;
  user-select: none;
}

.scale-demo-summary::-webkit-details-marker {
  display: none;
}

.scale-demo-summary,
.scale-demo-summary * {
  cursor: pointer;
}

.scale-demo-summary-copy {
  display: grid;
  gap: 4px;
}

.scale-demo-summary-title {
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.scale-demo-summary-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.scale-demo-summary-icon::before {
  content: '+';
  font-size: 1.35rem;
  line-height: 1;
}

.scale-demo-disclosure[open] .scale-demo-summary {
  border-bottom: 1px solid var(--border);
}

.scale-demo-disclosure[open] .scale-demo-summary-icon::before {
  content: '\2212';
  color: var(--accent);
}

.scale-demo-panel {
  display: grid;
  gap: 14px;
  padding: 18px 22px 22px;
}

.scale-demo-frame {
  width: 100%;
  padding: 10px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at top left, var(--hero-glow) 0%, transparent 32%),
    var(--surface);
  box-shadow: 0 20px 44px -18px var(--shadow-lg);
}

.scale-demo-frame .video-js {
  font-family: inherit;
  border-radius: 16px;
  overflow: hidden;
}

.scale-demo-frame .video-js .vjs-tech,
.scale-demo-frame .video-js .vjs-poster {
  border-radius: 16px;
}

.scale-demo-player {
  width: 100%;
}

.scale-demo-video {
  width: 100%;
}

.scale-demo-caption {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.55;
}

/* --- Sections --- */

.section {
  padding: 88px 0;
}

.section-divider {
  border-top: 1px solid var(--border);
}

/* Alternating tinted section backgrounds — full-bleed via negative margins */
#advantage,
#faq {
  --card-bg: var(--bg-color);
  background: var(--surface);
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  padding-left: calc(50vw - 50%);
  padding-right: calc(50vw - 50%);
}

#advantage.section-divider,
#faq.section-divider {
  border-top-color: transparent;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-heading h2 {
  font-family: var(--font-sans);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  font-optical-sizing: auto;
  margin: 12px 0 16px;
}

.section-heading p {
  color: var(--text-secondary);
  font-size: 1.08rem;
  line-height: 1.6;
}

/* --- Versus Grid --- */

.versus-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 980px;
  margin: 40px auto;
  position: relative;
}

.versus-grid::after {
  content: 'VS';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: var(--bg-color);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--text-secondary);
  z-index: 3;
  box-shadow: 0 4px 12px var(--shadow);
  font-size: 0.85rem;
}

.versus-card,
.feature-card,
.faq-item {
  background: var(--card-bg, var(--surface));
  border: 1px solid var(--border);
  border-radius: 20px;
}

.versus-card {
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.3s ease;
}

@media (hover: hover) {
  .versus-card:hover,
  .feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 32px -12px var(--shadow-lg);
  }
}

.versus-card:active,
.feature-card:active {
  transform: scale(0.98);
  transition: transform 0.1s;
}

.versus-card.old-way {
  background: rgba(125, 125, 125, 0.03);
  border-style: dashed;
}

.versus-card.new-way {
  border: 2px solid var(--accent);
  box-shadow: 0 20px 60px -10px var(--shadow-lg);
}

.card-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  padding: 5px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.8rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.versus-header {
  text-align: center;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
}

.versus-header h3 {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.versus-card.new-way .versus-header h3 {
  color: var(--accent);
}

.versus-header p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.versus-list {
  list-style: none;
  padding: 0;
  margin: 0;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.versus-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.versus-icon {
  font-size: 1.35rem;
  line-height: 1;
  flex-shrink: 0;
  opacity: 0.85;
}

.versus-content strong {
  display: block;
  margin-bottom: 3px;
  font-size: 1.02rem;
  color: var(--text-primary);
}

.versus-content span {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
}

.feature-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.feature-card h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.22rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.feature-card p,
.faq-item p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Features Grid --- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #a855f7);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  font-size: 1.2rem;
  line-height: 1;
  flex-shrink: 0;
}

/* --- FAQ --- */

.faq-container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
}

#faq .section-heading {
  max-width: 1040px;
  margin: 0 auto 40px;
}

.faq-item {
  margin-bottom: 12px;
  overflow: hidden;
  transition:
    background-color 0.2s ease,
    box-shadow 0.2s ease;
}

.faq-item:hover {
  background: var(--surface-hover);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 22px 24px;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 300;
  flex-shrink: 0;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.faq-item[open] summary::after {
  content: '\2212';
  color: var(--accent);
}

.faq-item p {
  padding: 0 24px 22px;
  line-height: 1.65;
}

.faq-item code {
  color: var(--accent);
  font-size: 0.92em;
}

/* --- Footer --- */

.site-footer {
  padding: 36px 0 56px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap-target-size);
  padding: 0 4px;
  color: var(--text-secondary);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--accent);
}

/* --- Back to Top Button --- */

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 54px;
  height: 54px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 999;
  color: var(--text-primary);
  box-shadow: 0 4px 12px var(--shadow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--surface-hover);
  transform: translateY(-4px);
  box-shadow: 0 6px 16px var(--shadow);
  color: var(--accent);
  border-color: var(--accent);
}

.back-to-top:active {
  transform: scale(0.9);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* --- Reduced Motion --- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- Responsive --- */

@media (max-width: 960px) and (orientation: portrait) {
  .video-tour-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .versus-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .versus-grid::after {
    display: none;
  }
}

@media (max-width: 960px) and (orientation: landscape) {
  .versus-grid {
    gap: 24px;
  }

  .versus-card {
    padding: 24px 20px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding: 48px 0 32px;
  }

  .hero > h1 {
    margin-bottom: 28px;
  }

  .cta-group {
    width: 100%;
  }

  .btn-store {
    width: 100%;
    justify-content: center;
  }

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

  .video-tour-copy {
    padding-top: 2px;
  }

  .video-tour-list {
    grid-template-columns: 1fr;
  }

  .scale-demo-summary {
    padding: 18px;
    align-items: flex-start;
  }

  .scale-demo-panel {
    padding: 16px 18px 18px;
  }

  .gallery-toolbar-separator {
    display: none;
  }

  .screenshot-theme-switch {
    width: auto;
    max-width: 100%;
  }

  .screenshot-theme-btn {
    justify-content: center;
  }

  /* Horizontal scrollable gallery on mobile */
  .gallery-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: 12px;
    scroll-padding-inline: 24px;
    padding-bottom: 8px;
  }

  .gallery-grid .screenshot-frame {
    flex: 0 0 clamp(280px, 84vw, 340px);
    max-width: 340px;
    scroll-snap-align: center;
  }

  .gallery-grid .screenshot-frame img {
    aspect-ratio: 16 / 10;
  }

  .site-footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
  }

  .site-footer .footer-links {
    width: 100%;
    justify-content: center;
  }

  .section {
    padding: 56px 0;
  }

  .versus-grid {
    gap: 12px;
  }

  .faq-item summary {
    min-height: 48px;
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-item p {
    padding: 0 18px 16px;
  }
}

/* --- Mobile Gallery Scrollbar --- */

.gallery-grid::-webkit-scrollbar {
  height: 4px;
}

.gallery-grid::-webkit-scrollbar-track {
  background: transparent;
}

.gallery-grid::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

/* --- Glightbox Overrides --- */

.glightbox-container {
  z-index: 10000 !important;
}

.goverlay {
  z-index: 9999 !important;
}

.glightbox-clean .gslide-description {
  background: var(--surface);
  color: var(--text-primary);
}

.glightbox-clean .gdesc-inner {
  color: var(--text-primary);
}

.glightbox-clean .gclose,
.glightbox-clean .gnext,
.glightbox-clean .gprev {
  min-width: 48px;
  min-height: 48px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

.glightbox-clean .gclose svg,
.glightbox-clean .gnext svg,
.glightbox-clean .gprev svg {
  filter: drop-shadow(0 1px 3px var(--shadow));
}

.glightbox-clean .gslide-image img {
  max-width: 95vw;
  max-height: 90vh;
}

@media (pointer: coarse) {
  .nav-links a,
  .footer-links a {
    padding: 0 8px;
  }

  .theme-switch,
  .screenshot-theme-switch {
    gap: 2px;
    padding: 2px;
  }

  .theme-btn {
    width: 36px;
    height: 36px;
  }

  .screenshot-theme-btn {
    padding: 7px 12px;
  }

  .btn-store {
    min-height: 52px;
  }

  .gallery-grid::-webkit-scrollbar {
    height: 8px;
  }

  .glightbox-clean .gclose,
  .glightbox-clean .gnext,
  .glightbox-clean .gprev {
    min-width: 56px;
    min-height: 56px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
  }
}