/* ==========================================================================
   Private Habit — Modern Privacy-First Design System
   ========================================================================== */

:root {
  /* Color Scheme & Hues */
  --hue-primary: 160;     /* Mint / Emerald */
  --hue-accent: 235;      /* Indigo */
  --hue-cyan: 190;        /* Cyan */

  /* Dark Theme (Default) */
  --bg-primary: #07090e;
  --bg-secondary: #0d121f;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(25, 34, 54, 0.85);
  --bg-glass: rgba(13, 18, 31, 0.8);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(16, 185, 129, 0.35);

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.25);
  --accent-indigo: #6366f1;
  --accent-cyan: #06b6d4;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  /* Elevation & Effects */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.18);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-accent: rgba(16, 185, 129, 0.3);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 0 30px rgba(16, 185, 129, 0.15);
}

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

html {
  color-scheme: dark light;
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(16, 185, 129, 0.12), transparent 70%),
    radial-gradient(ellipse 60% 40% at 90% 40%, rgba(99, 102, 241, 0.08), transparent 60%);
  background-attachment: fixed;
  min-height: 100vh;
}

/* Prevent background page scrolling when mobile menu is open */
html.menu-open,
body.menu-open {
  overflow: hidden !important;
  touch-action: none !important;
  overscroll-behavior: none !important;
}

/* Mobile Menu Backdrop Overlay */
.mobile-menu-backdrop {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 998;
  overflow: hidden;
  overscroll-behavior: contain;
  touch-action: none;
}

.mobile-menu-backdrop.is-active {
  display: block;
  animation: backdropFadeIn 0.2s ease forwards;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal), border var(--transition-normal);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-img-logo {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
  object-fit: cover;
  display: block;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--accent-green-glow);
  color: #ffffff;
  font-weight: 900;
}

.brand-name span {
  color: var(--accent-green);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
}

.mobile-only-item {
  display: none;
}

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

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-green), #059669);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--accent-green-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-privacy {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.28);
  color: var(--accent-green);
}

.badge-offline {
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.28);
  color: var(--accent-indigo);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 5rem 0 4rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3.5rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.hero-meta-strip {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.dot-green {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
}

/* ==========================================================================
   Interactive Phone Showcase
   ========================================================================== */
.phone-mockup-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 320px;
  height: 640px;
  background: #090d16;
  border-radius: 42px;
  border: 8px solid #1e293b;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal);
}

.phone-mockup:hover {
  transform: translateY(-6px) scale(1.02);
}

.phone-notch {
  width: 120px;
  height: 20px;
  background: #1e293b;
  margin: 0 auto;
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

.phone-screen {
  flex: 1;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  overflow-y: auto;
}

.screen-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.screen-greeting {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.screen-title {
  font-size: 1rem;
  font-weight: 700;
}

.offline-pill {
  font-size: 0.65rem;
  padding: 0.2rem 0.5rem;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.streak-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.streak-number {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-green);
}

.habit-item-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.habit-item-card.done {
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.08);
}

.habit-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.habit-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.check-circle {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
}

.habit-item-card.done .check-circle {
  border-color: var(--accent-green);
  background: var(--accent-green);
  color: #000;
  font-size: 0.75rem;
  font-weight: 800;
}

/* ==========================================================================
   Section Headers & Cards
   ========================================================================== */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-subtitle {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-green);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.feature-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
}

.feature-body {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Comparison Table
   ========================================================================== */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th,
.comparison-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.02);
}

.comparison-table td {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.col-highlight {
  background: rgba(16, 185, 129, 0.04);
  color: var(--text-main) !important;
  font-weight: 600;
}

.badge-yes {
  color: var(--accent-green);
  font-weight: 700;
}

.badge-no {
  color: var(--accent-rose);
  font-weight: 600;
}

/* ==========================================================================
   FAQ Section (Native HTML5 Details)
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--border-accent);
}

.faq-summary {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

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

.faq-summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

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

.faq-content {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Download Banner & Checksum Card
   ========================================================================== */
.download-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(99, 102, 241, 0.08));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-glow);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.hash-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  max-width: 100%;
  overflow-x: auto;
}

.copy-btn {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
}

.copy-btn:hover {
  background: var(--accent-green);
  color: #000;
}

/* ==========================================================================
   Document Content (Privacy & Support Pages)
   ========================================================================== */
.doc-header {
  padding: 4rem 0 2rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 3rem;
}

.doc-body h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.01em;
}

.doc-body h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin: 1.75rem 0 0.75rem;
}

.doc-body p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.doc-body ul, .doc-body ol {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.doc-body li {
  margin-bottom: 0.5rem;
}

.doc-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--accent-green);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.doc-box.alert {
  border-left-color: var(--accent-amber);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2rem;
  margin-top: 6rem;
}

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

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-col a:hover {
  color: var(--text-main);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Responsive Breakpoints & Mobile Optimization
   ========================================================================== */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    align-items: center;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-meta-strip {
    justify-content: center;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Tablet & Mobile Navigation Breakpoint */
@media (max-width: 768px) {
  .site-header {
    z-index: 1000;
  }

  .site-header.menu-open {
    background: #0d121f !important;
  }

  [data-theme="light"] .site-header.menu-open {
    background: #ffffff !important;
  }

  .container {
    padding: 0 1rem;
  }

  .nav-wrap {
    height: 64px;
  }

  .brand-logo {
    font-size: 1.15rem;
    gap: 0.5rem;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }

  /* Prevent Header Download Button Overflow on Mobile */
  .header-download-btn {
    display: none !important;
  }

  .nav-actions {
    gap: 0.5rem;
  }

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

  .mobile-menu-btn {
    display: flex;
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
    z-index: 1001;
  }

  /* Mobile Dropdown Drawer: 100% Solid Opaque (No Transparency) */
  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: #0d121f !important; /* Pure solid opaque dark surface */
    opacity: 1 !important;
    padding: 1.25rem 1.5rem 1.75rem;
    gap: 0.6rem;
    border-bottom: 2px solid var(--accent-green);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.85);
    z-index: 999;
    max-height: calc(100dvh - 64px);
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  [data-theme="light"] .nav-links {
    background: #ffffff !important; /* Pure solid opaque light surface */
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.18);
    border-bottom: 2px solid var(--accent-green);
  }

  .nav-links.is-open {
    display: flex;
    animation: menuSlideDown 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }

  .nav-links a {
    font-size: 1.05rem;
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    display: block;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-fast);
  }

  [data-theme="light"] .nav-links a {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.05);
  }

  .nav-links a:hover,
  .nav-links a:active {
    background: var(--accent-green-glow);
    border-color: var(--border-accent);
    color: var(--accent-green);
    transform: translateX(4px);
  }

  /* Mobile Drawer Download Button */
  .mobile-only-item {
    display: block;
    margin-top: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
  }

  .mobile-menu-download-btn {
    width: 100%;
    padding: 0.85rem 1.25rem;
    text-align: center;
    font-size: 0.95rem;
    box-shadow: 0 4px 15px var(--accent-green-glow);
  }

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

/* Small Smartphone Optimization (<= 480px) */
@media (max-width: 480px) {
  .hero-title {
    font-size: 1.95rem;
  }

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

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

  .hero-cta-group .btn {
    width: 100%;
  }

  .phone-mockup {
    width: 290px;
    height: 590px;
  }

  .download-card {
    padding: 2rem 1rem;
  }

  .hash-container {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .hash-container span {
    word-break: break-all;
    font-size: 0.75rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@keyframes menuSlideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}