/* -------------------------------------------------------------
 * YAHT LANDING SYSTEM STYLE - Vanilla CSS Custom Design
 * ------------------------------------------------------------- */

/* Define color tokens for themes and schemes */

/* 1. CLEAR THEME */
html.theme-clear.scheme-light {
  --bg-app: #f6f8fb;
  --bg-chrome: #eaf0f7;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f9fbfe;
  --bg-inset: #eff3f8;
  --text-primary: #18212c;
  --text-secondary: #4f6278;
  --text-tertiary: #76879b;
  --accent: #3f74b5;
  --accent-muted: #7099cc;
  --accent-soft-bg: rgba(63, 116, 181, 0.12);
  --border-default: rgba(24, 33, 44, 0.11);
  --border-strong: rgba(24, 33, 44, 0.22);
  --gradient-header-start: #b5cbe4;
  --gradient-header-mid: #dde8f5;
  --gradient-header-end: #f6f8fb;
  --shadow: rgba(0, 0, 0, 0.05);
}

html.theme-clear.scheme-dark {
  --bg-app: #0f1620;
  --bg-chrome: #162130;
  --bg-surface: #1d2a3a;
  --bg-surface-elevated: #26384d;
  --bg-inset: #2d415a;
  --text-primary: #e7eef8;
  --text-secondary: #c5cfdf;
  --text-tertiary: #9baac0;
  --accent: #7fb1e8;
  --accent-muted: #5f8fc2;
  --accent-soft-bg: rgba(127, 177, 232, 0.15);
  --border-default: rgba(231, 238, 248, 0.13);
  --border-strong: rgba(231, 238, 248, 0.25);
  --gradient-header-start: #1c2b3e;
  --gradient-header-mid: #1a293b;
  --gradient-header-end: #0f1620;
  --shadow: rgba(0, 0, 0, 0.35);
}

/* 2. SEPIA THEME */
html.theme-sepia.scheme-light {
  --bg-app: #fbf7f1;
  --bg-chrome: #f6eadc;
  --bg-surface: #fffdf9;
  --bg-surface-elevated: #fff9f2;
  --bg-inset: #f6eadc;
  --text-primary: #2f1f1a;
  --text-secondary: #715f54;
  --text-tertiary: #9b8779;
  --accent: #8d6140;
  --accent-muted: #b98d62;
  --accent-soft-bg: rgba(185, 141, 98, 0.12);
  --border-default: rgba(47, 31, 26, 0.095);
  --border-strong: rgba(47, 31, 26, 0.2);
  --gradient-header-start: #e8d0b5;
  --gradient-header-mid: #f5e8d9;
  --gradient-header-end: #fbf7f1;
  --shadow: rgba(47, 31, 26, 0.045);
}

html.theme-sepia.scheme-dark {
  --bg-app: #16110d;
  --bg-chrome: #231a12;
  --bg-surface: #241b14;
  --bg-surface-elevated: #2e241b;
  --bg-inset: #3a2e22;
  --text-primary: #f5e8d6;
  --text-secondary: #d1c0a9;
  --text-tertiary: #a9947b;
  --accent: #d0ad73;
  --accent-muted: #bc925a;
  --accent-soft-bg: rgba(188, 146, 90, 0.15);
  --border-default: rgba(245, 232, 214, 0.13);
  --border-strong: rgba(245, 232, 214, 0.24);
  --gradient-header-start: #231a12;
  --gradient-header-mid: #1c150f;
  --gradient-header-end: #16110d;
  --shadow: rgba(0, 0, 0, 0.3);
}

/* 3. OLED THEME */
html.theme-oled.scheme-light {
  /* OLED light falls back to clear light */
  --bg-app: #f6f8fb;
  --bg-chrome: #eaf0f7;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f9fbfe;
  --bg-inset: #eff3f8;
  --text-primary: #18212c;
  --text-secondary: #4f6278;
  --text-tertiary: #76879b;
  --accent: #3f74b5;
  --accent-muted: #7099cc;
  --accent-soft-bg: rgba(63, 116, 181, 0.12);
  --border-default: rgba(24, 33, 44, 0.11);
  --border-strong: rgba(24, 33, 44, 0.22);
  --gradient-header-start: #b5cbe4;
  --gradient-header-mid: #dde8f5;
  --gradient-header-end: #f6f8fb;
  --shadow: rgba(0, 0, 0, 0.05);
}

html.theme-oled.scheme-dark {
  --bg-app: #000000;
  --bg-chrome: #050b14;
  --bg-surface: #0b1320;
  --bg-surface-elevated: #142638;
  --bg-inset: #1a2b40;
  --text-primary: #edf3fb;
  --text-secondary: #c9d4e3;
  --text-tertiary: #9aaec4;
  --accent: #7fb1e8;
  --accent-muted: #5f8fc2;
  --accent-soft-bg: rgba(127, 177, 232, 0.15);
  --border-default: rgba(237, 243, 251, 0.14);
  --border-strong: rgba(237, 243, 251, 0.28);
  --gradient-header-start: #06101d;
  --gradient-header-mid: #050d18;
  --gradient-header-end: #000000;
  --shadow: rgba(0, 0, 0, 0.45);
}

html {
  --phone-frame-gap: #09090b;
  --phone-casing: #27272a;
  --phone-hardware-highlight: rgba(255, 255, 255, 0.15);
  --phone-hardware-shadow: rgba(0, 0, 0, 0.4);
  --phone-frame-ring: rgba(255, 255, 255, 0.05);
  --phone-drop-shadow: rgba(0, 0, 0, 0.6);
}

html.scheme-light {
  --phone-frame-gap: #252a30;
  --phone-casing: #4f5863;
  --phone-hardware-highlight: rgba(255, 255, 255, 0.34);
  --phone-hardware-shadow: rgba(12, 18, 26, 0.32);
  --phone-frame-ring: rgba(255, 255, 255, 0.24);
  --phone-drop-shadow: rgba(16, 24, 34, 0.26);
}

/* Global Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: "Plus Jakarta Sans", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
  transition:
    background-color 0.4s ease,
    color 0.4s ease;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

/* -------------------------------------------------------------
 * Layout Structure
 * ------------------------------------------------------------- */

.section-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header Styling */
.app-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: color-mix(in srgb, var(--bg-app) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-default);
  transition:
    background-color 0.4s ease,
    border-color 0.4s ease;
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.75rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.app-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  font-family: "Outfit", sans-serif;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Theme Switcher controls */
.theme-switcher {
  display: flex;
  background-color: var(--bg-inset);
  border: 1px solid var(--border-default);
  padding: 3px;
  border-radius: 20px;
  gap: 2px;
}

.theme-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: "Outfit", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 16px;
  cursor: pointer;
  width: 64px;
  transition: all 0.2s ease;
}

.theme-btn:hover {
  color: var(--text-primary);
}

.theme-btn.active,
html.theme-sepia .theme-btn[data-theme="sepia"],
html.theme-clear .theme-btn[data-theme="clear"],
html.theme-oled .theme-btn[data-theme="oled"] {
  background-color: var(--bg-surface);
  color: var(--accent);
  box-shadow: 0 2px 4px var(--shadow);
}

.divider {
  width: 1px;
  height: 20px;
  background-color: var(--border-default);
}

/* Light/Dark scheme toggle */
.scheme-toggle {
  background: var(--bg-inset);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.scheme-toggle:hover {
  background-color: var(--border-strong);
}

.scheme-toggle svg {
  width: 16px;
  height: 16px;
}

/* Toggle icon display based on active scheme */
html.scheme-dark .sun-icon {
  display: block;
}
html.scheme-dark .moon-icon {
  display: none;
}
html.scheme-light .sun-icon {
  display: none;
}
html.scheme-light .moon-icon {
  display: block;
}

.nav-download-btn {
  text-decoration: none;
  background-color: var(--accent);
  color: var(--bg-app);
  padding: 8px 16px;
  border-radius: 20px;
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-download-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 10px var(--shadow);
}

/* -------------------------------------------------------------
 * Hero Section
 * ------------------------------------------------------------- */

.hero-section {
  padding: 5rem 0 3rem;
  position: relative;
  background-image: radial-gradient(circle at 100% 0%, var(--gradient-header-start) 0%, transparent 40%);
}

.hero-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.badge-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.pill-badge {
  font-family: "Outfit", sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 30px;
}

.accent-badge {
  background-color: var(--accent-soft-bg);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}

.info-badge {
  background-color: var(--bg-inset);
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 1.25rem;
}

.highlight-text {
  color: var(--accent);
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 30px;
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.primary-btn {
  background-color: var(--accent);
  color: var(--bg-app);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--shadow);
}

.secondary-btn {
  background-color: var(--bg-inset);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
}

.secondary-btn:hover {
  transform: translateY(-2px);
  background-color: var(--bg-chrome);
}

/* -------------------------------------------------------------
 * Phone Mockup (Detailed Outer-Shell Frame & Correct Aspect)
 * ------------------------------------------------------------- */

.hero-mockup-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  width: 275px;
  background-color: var(--phone-frame-gap); /* Inner frame gap */
  border: 10px solid var(--phone-casing); /* Premium hardware casing */
  border-radius: 40px;
  box-shadow:
    0 20px 45px -10px var(--phone-drop-shadow),
    0 0 0 1px var(--phone-frame-ring);
  position: relative;
  padding: 3px; /* Offset for screen bezel */
  transform: rotate(1deg) translateY(-5px);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.phone-mockup:hover {
  transform: rotate(0deg) translateY(-12px);
}

/* Physical Hardware Buttons */
.phone-button {
  position: absolute;
  background-color: var(--phone-casing);
  border-left: 1px solid var(--phone-hardware-highlight);
  border-right: 1px solid var(--phone-hardware-shadow);
  border-radius: 2px 0 0 2px;
  z-index: -1;
}

.phone-button.volume-up {
  width: 3px;
  height: 38px;
  left: -13px;
  top: 90px;
}

.phone-button.volume-down {
  width: 3px;
  height: 38px;
  left: -13px;
  top: 140px;
}

.phone-button.power {
  width: 3px;
  height: 52px;
  right: -13px;
  top: 110px;
  border-radius: 0 2px 2px 0;
  border-right: 1px solid var(--phone-hardware-highlight);
  border-left: 1px solid var(--phone-hardware-shadow);
}

/* Circular Hole-Punch Android Camera */
.phone-notch {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  background-color: #000000;
  border-radius: 50%;
  z-index: 10;
}

/* Screen Container (Black screen bezel + Bottom Navigation offset) */
.phone-screen {
  width: 100%;
  aspect-ratio: 758 / 1600; /* Matches exact dimensions of landing screenshots */
  background-color: #000000; /* Dark background to prevent flashes */
  overflow: hidden;
  border: 5px solid #000000; /* Inside black screen bezel */
  border-radius: 24px; /* Matches screen corner radius */
  display: flex;
  flex-direction: column;
  padding-bottom: 0; /* Removed bottom border padding as requested */
}

.screenshot-wrapper {
  flex: 1;
  background-color: #000000; /* Fades to black when screenshot opacity is animated */
  overflow: hidden;
  position: relative;
}

.mockup-img,
.gallery-screenshot-img {
  width: 100%;
  height: 100%;
  object-fit: fill; /* Use fill to avoid cropping the bottom menu text */
  display: block;
}

.screenshot-layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  will-change: opacity;
}

.screenshot-wrapper.is-crossfade-ready .screenshot-layer {
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.screenshot-layer.is-active {
  opacity: 1;
  z-index: 1;
}

/* -------------------------------------------------------------
 * Spotlight Section (GPL / FOSS details)
 * ------------------------------------------------------------- */

.spotlight-section {
  padding: 2rem 0;
}

.spotlight-card {
  background-color: var(--bg-surface); /* Stand out clearly on light sepia backgrounds */
  border: 1px solid var(--border-default);
  border-radius: 20px;
  padding: 2rem 2.5rem;
  display: flex;
  gap: 2rem;
  align-items: center;
  box-shadow: 0 8px 24px var(--shadow);
  transition:
    background-color 0.4s ease,
    border-color 0.4s ease;
}

.spotlight-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background-color: var(--accent-soft-bg);
  color: var(--accent);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
}

.spotlight-icon svg {
  width: 28px;
  height: 28px;
}

.spotlight-content {
  flex-grow: 1;
}

.spotlight-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.spotlight-text {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1.25rem;
  max-width: 800px;
}

.badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.spotlight-pill {
  background-color: var(--bg-inset);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 30px;
  border: 1px solid var(--border-default);
}

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

.features-section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 15px var(--shadow);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: 0 10px 24px var(--shadow);
}

.feature-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: var(--accent-soft-bg);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.feature-icon-box svg {
  width: 20px;
  height: 20px;
}

.feature-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.feature-card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* -------------------------------------------------------------
 * Screenshot Gallery (Explore Part)
 * ------------------------------------------------------------- */

.gallery-section {
  padding: 3rem 0;
  background-color: var(--bg-app); /* Theme-dependent section background */
  transition: background-color 0.4s ease;
}

.gallery-section .section-title {
  color: var(--text-primary); /* Theme-dependent title */
}

.gallery-section .section-subtitle {
  color: var(--text-secondary); /* Theme-dependent subtitle */
}

.gallery-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin: 0 auto 4.5rem auto; /* Increased space between categories selector and mockup */
  background-color: var(--bg-inset); /* Theme-dependent inset background */
  padding: 6px;
  border-radius: 30px;
  border: 1px solid var(--border-default);
  flex-wrap: wrap;
  max-width: 680px;
  width: 100%;
  transition:
    background-color 0.4s ease,
    border-color 0.4s ease;
}

.gallery-swipe-hint {
  display: none;
}

.gallery-tab-btn {
  border: none;
  background-color: transparent;
  color: var(--text-secondary); /* Theme-dependent text color */
  padding: 8px 20px;
  border-radius: 24px;
  font-family: "Outfit", sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.gallery-tab-btn:hover {
  color: var(--text-primary);
  background-color: var(--border-default);
}

.gallery-tab-btn.active {
  background-color: var(--accent); /* Theme-dependent active accent color */
  color: var(--bg-app); /* Theme-dependent text color on active tab */
  box-shadow: 0 2px 6px var(--shadow);
}

/* Gallery display layout */
.gallery-display-wrapper {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 4rem;
  align-items: center; /* Center phone and card vertically as requested */
}

.gallery-display-wrapper .phone-mockup {
  margin: 0 auto;
  transform: rotate(-1deg) translateY(-5px); /* Tilt to the left as requested */
}

.gallery-display-wrapper .phone-mockup:hover {
  transform: rotate(0deg) translateY(-12px);
}

.screenshot-wrapper {
  flex: 1;
  background-color: #000000;
  overflow: hidden;
  position: relative;
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
}

.gallery-details {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-surface); /* Card background on container */
  border: 1px solid var(--border-default); /* Card border on container */
  border-radius: 24px;
  padding: 2.5rem;
  box-shadow: 0 8px 24px var(--shadow);
  justify-content: center; /* Vertically center description texts inside the card */
  transition:
    background-color 0.4s ease,
    border-color 0.4s ease;
}

.desc-card {
  display: none;
}

.desc-card.active {
  display: block;
}

.desc-card h3 {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary); /* Same black/white color as other headings */
}

.desc-card p {
  font-size: 1.05rem;
  color: var(--text-secondary); /* Theme-dependent paragraph text */
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.detail-tag {
  display: inline-block;
  background-color: var(--bg-inset); /* Theme-dependent tag background */
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-right: 0.4rem;
  margin-bottom: 0.4rem;
  box-shadow: inset 0 1px 2px var(--shadow);
  transition:
    background-color 0.4s ease,
    border-color 0.4s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Card slide animations */
.desc-card.slide-exit {
  display: block;
  animation: slideOutLeft 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.desc-card.slide-enter {
  display: block;
  animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes slideOutLeft {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-16px);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* -------------------------------------------------------------
 * Download Call-To-Action
 * ------------------------------------------------------------- */

.download-section {
  padding: 6rem 0;
}

.download-card {
  background-color: var(--bg-surface); /* Stand out clearly on light sepia backgrounds */
  border: 1px solid var(--border-default);
  border-radius: 24px;
  padding: 4rem 2rem;
  text-align: center;
  box-shadow: 0 15px 35px var(--shadow);
  max-width: 850px;
  margin: 0 auto;
  transition: all 0.4s ease;
}

.download-title {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.download-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.store-badges {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.store-badge-btn {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.store-badge-btn-disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.badge-img {
  height: 52px; /* Bigger button sizes */
  width: auto;
  border-radius: 8px;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
  box-shadow: 0 2px 8px var(--shadow);
}

.store-badge-btn-disabled .badge-img {
  filter: grayscale(1);
  opacity: 0.8;
}

.store-badge-btn:not(.store-badge-btn-disabled) .badge-img:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px var(--shadow);
}

.download-foss-notice {
  font-size: 0.9rem;
  color: var(--text-tertiary);
}

.download-foss-notice a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.download-foss-notice a:hover {
  text-decoration: underline;
}

/* -------------------------------------------------------------
 * Footer Styling
 * ------------------------------------------------------------- */

.app-footer {
  background-color: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-default);
  padding: 4rem 0 2.5rem;
  transition:
    background-color 0.4s ease,
    border-color 0.4s ease;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.brand-desc {
  color: var(--text-secondary);
  margin-top: 0.75rem;
  max-width: 320px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links h4 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-default);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

.signature {
  font-weight: 600;
}

/* -------------------------------------------------------------
 * Responsive Media Queries
 * ------------------------------------------------------------- */

@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }

  .badge-row {
    justify-content: center;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-mockup-wrapper {
    margin-top: 1.5rem;
  }

  .gallery-display-wrapper {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .gallery-details {
    text-align: center;
  }

  .detail-tag {
    margin-right: 0.2rem;
    margin-left: 0.2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-brand {
    grid-column: span 2;
  }
}

@media (max-width: 600px) {
  .section-container {
    padding: 0 1.25rem;
  }

  .header-container {
    padding: 0.75rem 1.25rem;
  }

  .hero-section {
    padding: 3.25rem 0 2rem;
  }

  .hero-container {
    gap: 2rem;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-description {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

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

  .phone-mockup {
    width: min(245px, 74vw);
  }

  .spotlight-section {
    padding: 1.5rem 0 2.5rem;
  }

  .spotlight-card {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem;
    gap: 1.25rem;
  }

  .badge-group {
    justify-content: center;
  }

  .features-section {
    padding: 2.75rem 0;
  }

  .section-header {
    margin-bottom: 2rem;
  }

  .section-title {
    font-size: 1.95rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .feature-card {
    padding: 1.5rem;
  }

  .gallery-section {
    padding: 2.75rem 0 3rem;
  }

  .gallery-tabs {
    gap: 0.45rem;
    width: auto;
    max-width: none;
    margin-bottom: 0.6rem;
    padding: 0.45rem;
    border-radius: 999px;
  }

  .gallery-tab-btn {
    width: 0.65rem;
    min-width: 0.65rem;
    height: 0.65rem;
    padding: 0;
    overflow: hidden;
    border-radius: 999px;
    font-size: 0;
    color: transparent;
    background-color: var(--border-strong);
  }

  .gallery-tab-btn.active {
    width: 1.8rem;
    min-width: 1.8rem;
  }

  .gallery-swipe-hint {
    display: block;
    margin: 0 auto 1.5rem;
    color: var(--text-tertiary);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-align: center;
    text-transform: uppercase;
  }

  .gallery-display-wrapper {
    gap: 1.5rem;
    touch-action: pan-y;
    user-select: none;
  }

  .gallery-details {
    padding: 1.5rem;
    border-radius: 18px;
  }

  .desc-card h3 {
    font-size: 1.4rem;
  }

  .desc-card p {
    font-size: 0.95rem;
    margin-bottom: 1.1rem;
  }

  .download-section {
    padding: 3.25rem 0;
  }

  .download-card {
    padding: 2.5rem 1.25rem;
  }

  .download-title {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    margin-bottom: 2rem;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .theme-switcher {
    display: none; /* Hide theme switcher in header on mobile */
  }

  .app-footer {
    padding: 3rem 0 2rem;
  }
}

@media (hover: none) and (pointer: coarse) {
  [data-mobile-reveal] {
    will-change: transform, box-shadow, border-color;
  }

  .feature-card.is-mobile-revealed {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 24px var(--shadow);
  }

  .hero-mockup-wrapper.is-mobile-revealed .phone-mockup,
  .gallery-display-wrapper.is-mobile-revealed .phone-mockup {
    transform: rotate(0deg) translateY(-12px);
  }

  .gallery-display-wrapper {
    cursor: grab;
  }

  .gallery-display-wrapper:active {
    cursor: grabbing;
  }
}

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

  .phone-mockup,
  .phone-mockup:hover,
  .gallery-display-wrapper .phone-mockup,
  .gallery-display-wrapper .phone-mockup:hover,
  .primary-btn:hover,
  .secondary-btn:hover,
  .feature-card:hover,
  .feature-card.is-mobile-revealed,
  .hero-mockup-wrapper.is-mobile-revealed .phone-mockup,
  .gallery-display-wrapper.is-mobile-revealed .phone-mockup,
  .nav-download-btn:hover,
  .store-badge-btn:not(.store-badge-btn-disabled) .badge-img:hover {
    transform: none;
  }
}