/* ==========================================================================
   FontFinder Landing Page Design System & Styles
   ========================================================================== */

:root {
  --bg-primary: #0a0c10;
  --bg-secondary: #12161f;
  --bg-card: rgba(22, 27, 36, 0.7);
  --bg-card-hover: rgba(30, 38, 51, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.35);

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --accent-primary: #6366f1;
  --accent-secondary: #a855f7;
  --accent-cyan: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-glow: rgba(99, 102, 241, 0.25);

  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

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

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg,
picture,
video {
  max-width: 100%;
  height: auto;
}

/* Ambient Backdrops Container (Zero Horizontal Overflow) */
.ambient-glow-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  max-width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.45;
}

.glow-top-left {
  top: -150px;
  left: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.5) 0%, transparent 70%);
}

.glow-top-right {
  top: 100px;
  right: -150px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.45) 0%, transparent 70%);
}

.glow-center {
  top: 800px;
  left: 20%;
  width: 800px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.2) 0%, transparent 70%);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(10, 12, 16, 0.75);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-logo {
  border-radius: var(--radius-sm);
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.3);
  transition: transform var(--transition-fast);
}

.brand:hover .brand-logo {
  transform: scale(1.05) rotate(2deg);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: #ffffff;
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
}

.github-link:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-subtle {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.badge-accent {
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #c7d2fe;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.tag-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(0.95);
    opacity: 0.7;
  }

  50% {
    transform: scale(1.3);
    opacity: 1;
  }

  100% {
    transform: scale(0.95);
    opacity: 0.7;
  }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.gradient-text {
  background: var(--accent-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

/* Primary CTA Button */
.hero-cta-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 50px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  padding: 16px 36px;
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255, 255, 255, 0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 38px rgba(168, 85, 247, 0.5);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary.btn-windows {
  background: linear-gradient(135deg, #0078d4 0%, #0284c7 50%, #2563eb 100%);
  box-shadow: 0 8px 30px rgba(0, 120, 212, 0.45);
}

.btn-primary.btn-windows:hover {
  box-shadow: 0 12px 38px rgba(14, 165, 233, 0.55);
}

.btn-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.btn-text-group {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.btn-main-text {
  font-size: 1.15rem;
  font-weight: 700;
}

.btn-sub-text {
  font-size: 0.8rem;
  opacity: 0.85;
}

.alternative-downloads {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.alt-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.alt-link:hover {
  color: #ffffff;
  text-decoration: underline;
}

.divider {
  color: rgba(255, 255, 255, 0.15);
}

/* Latest Release Meta Info Card */
.release-meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 9999px;
  font-size: 0.82rem;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  margin-top: 4px;
}

.release-badge-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.7);
  flex-shrink: 0;
  display: inline-block;
}

.release-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.meta-label {
  color: var(--text-dim);
  font-size: 0.78rem;
}

.meta-value {
  color: var(--text-main);
  font-weight: 600;
}

.meta-divider {
  color: rgba(255, 255, 255, 0.18);
  font-size: 0.75rem;
}

.meta-link {
  color: #818cf8;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.meta-link:hover {
  color: #a5b4fc;
  text-decoration: underline;
}

/* Value Cards (Why Font Finder) */
.value-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto 60px;
}

.value-card {
  padding: 24px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  text-align: center;
  transition: all var(--transition-normal);
}

.value-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.value-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  line-height: 1;
}

.value-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.value-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Hero Visual / Mockup Frame */
.hero-visual {
  max-width: 1040px;
  margin: 0 auto;
}

.glass-frame {
  background: rgba(18, 22, 31, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7), 0 0 40px rgba(99, 102, 241, 0.15);
  backdrop-filter: blur(20px);
  transition: transform var(--transition-normal);
}

.glass-frame:hover {
  transform: translateY(-4px);
}

.frame-bar {
  display: flex;
  align-items: center;
  padding: 12px 18px;
  background: rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

.window-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-close {
  background-color: #ef4444;
}

.dot-minimize {
  background-color: #f59e0b;
}

.dot-maximize {
  background-color: #10b981;
}

.frame-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 500;
}

.preview-img {
  width: 100%;
  height: auto;
  display: block;
}

/* Section Shared */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

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

/* Features Categories & Blocks */
.features-categories {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.category-block {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.category-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.category-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
}

.feature-icon-box {
  font-size: 1.8rem;
  margin-bottom: 12px;
  display: inline-block;
}

.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #ffffff;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.feature-desc code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: #a5b4fc;
}

/* Mobile Navigation Button & Drawer Styles */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  justify-content: center;
  align-items: center;
}

.mobile-menu-btn .menu-bar {
  width: 22px;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-btn.active .menu-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-btn.active .menu-bar:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active .menu-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Device Notice Banner */
.mobile-notice-banner {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.mobile-notice-banner .notice-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.mobile-notice-banner .notice-text strong {
  display: block;
  font-size: 0.95rem;
  color: #fbbf24;
  margin-bottom: 2px;
}

.mobile-notice-banner .notice-text p {
  font-size: 0.85rem;
  color: #fde68a;
  margin: 0;
  line-height: 1.45;
}

/* Install Guide */
.guide-box {
  max-width: 820px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.guide-tabs {
  display: flex;
  background: rgba(10, 12, 16, 0.8);
  border-bottom: 1px solid var(--border-color);
}

.guide-tab {
  flex: 1;
  padding: 18px 24px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.guide-tab.active {
  color: #ffffff;
  background: rgba(99, 102, 241, 0.12);
  border-bottom: 2px solid var(--accent-primary);
}

.guide-content {
  display: none;
  padding: 36px;
  flex-direction: column;
  gap: 24px;
}

.guide-content.active {
  display: flex;
}

.guide-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
  border: 1px solid rgba(99, 102, 241, 0.4);
}

.command-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #06080c;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  margin-top: 12px;
  gap: 16px;
}

.command-box code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #38bdf8;
  word-break: break-all;
}

.btn-copy {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 14px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-copy:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.3);
}

/* FAQ Section (AEO) */
.faq-section {
  padding: 80px 0;
}

.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

.faq-item[open] {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  user-select: none;
}

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

.faq-chevron {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.68;
}

.faq-answer code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: #a5b4fc;
}

.faq-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 9px 18px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-sm);
  color: #c7d2fe;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.faq-link-btn:hover {
  background: rgba(99, 102, 241, 0.3);
  border-color: rgba(99, 102, 241, 0.6);
  color: #ffffff;
  transform: translateY(-1px);
}

/* Specs Section */
.specs-section {
  padding-bottom: 60px;
}

.specs-card {
  background: linear-gradient(135deg, rgba(30, 38, 55, 0.6) 0%, rgba(15, 20, 30, 0.8) 100%);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.specs-info h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin: 16px 0 12px;
}

.specs-info p {
  color: var(--text-muted);
  max-width: 800px;
  margin-bottom: 24px;
  font-size: 1.05rem;
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.spec-tag {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: #e2e8f0;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 50px 0;
  background: rgba(10, 12, 16, 0.95);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  margin-bottom: 6px;
}

.footer-copy {
  color: var(--text-dim);
  font-size: 0.88rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #ffffff;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: rgba(16, 185, 129, 0.9);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  font-weight: 600;
  font-size: 0.95rem;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive Media Queries (Mobile & Tablet) */
@media (max-width: 768px) {

  html,
  body {
    width: 100vw;
    max-width: 100vw;
    overflow-x: hidden;
  }

  .ambient-glow-container {
    max-width: 100vw;
  }

  .container {
    width: 100%;
    max-width: 100%;
    padding: 0 16px;
  }

  /* Mobile Navbar & Menu Drawer */
  .mobile-menu-btn {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 12, 16, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    align-items: stretch;
    padding: 20px 24px 28px;
    gap: 14px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: all var(--transition-normal);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
    z-index: 99;
  }

  .nav-links.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
    color: #e5e7eb;
    background: rgba(255, 255, 255, 0.03);
    text-align: center;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
  }

  .github-link {
    justify-content: center;
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
    color: #ffffff;
    font-weight: 600;
  }

  /* Hero Section Mobile */
  .hero-section {
    padding: 36px 0 24px;
  }

  .hero-tag {
    font-size: 0.78rem;
    padding: 4px 12px;
    margin-bottom: 16px;
  }

  .hero-title {
    font-size: clamp(1.85rem, 7.5vw, 2.5rem);
    line-height: 1.25;
    margin-bottom: 14px;
    word-break: keep-all;
  }

  .hero-subtitle {
    font-size: 0.95rem;
    line-height: 1.55;
    margin-bottom: 24px;
    padding: 0;
    word-break: keep-all;
  }

  .hero-cta-wrapper {
    width: 100%;
    margin-bottom: 32px;
    gap: 12px;
  }

  .btn-primary {
    width: 100%;
    max-width: 360px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
  }

  .btn-icon {
    font-size: 1.6rem;
  }

  .btn-main-text {
    font-size: 1.05rem;
  }

  .btn-sub-text {
    font-size: 0.78rem;
  }

  .alternative-downloads {
    flex-wrap: wrap;
    justify-content: center;
    font-size: 0.82rem;
    gap: 8px;
    line-height: 1.4;
  }

  .release-meta-badge {
    flex-wrap: wrap;
    justify-content: center;
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    gap: 8px;
    width: 100%;
    max-width: 320px;
    font-size: 0.8rem;
  }

  /* Value Cards: 2x2 Grid on Mobile (Zero awkward vertical stretching) */
  .value-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 32px;
    max-width: 100%;
  }

  .value-card {
    padding: 14px 8px;
    border-radius: var(--radius-sm);
  }

  .value-icon {
    font-size: 1.6rem;
    margin-bottom: 6px;
  }

  .value-title {
    font-size: 0.95rem;
    margin-bottom: 4px;
    word-break: keep-all;
  }

  .value-desc {
    font-size: 0.76rem;
    line-height: 1.35;
    word-break: keep-all;
  }

  /* Hero Visual Mockup */
  .hero-visual {
    margin: 0;
  }

  .glass-frame {
    border-radius: var(--radius-md);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
  }

  .frame-bar {
    padding: 8px 12px;
  }

  .frame-title {
    font-size: 0.75rem;
  }

  .preview-img {
    width: 100%;
    height: auto;
    display: block;
  }

  /* Sections Mobile */
  .section {
    padding: 48px 0;
  }

  .section-header {
    margin-bottom: 28px;
  }

  .section-title {
    font-size: 1.55rem;
    word-break: keep-all;
  }

  .section-desc {
    font-size: 0.92rem;
    word-break: keep-all;
  }

  /* Features Categories & Cards */
  .features-categories {
    gap: 32px;
  }

  .category-header {
    gap: 10px;
    padding-bottom: 8px;
  }

  .category-title {
    font-size: 1.15rem;
    word-break: keep-all;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .feature-card {
    padding: 18px 16px;
  }

  .feature-icon-box {
    font-size: 1.5rem;
    margin-bottom: 8px;
  }

  .feature-title {
    font-size: 1.05rem;
    margin-bottom: 6px;
  }

  .feature-desc {
    font-size: 0.88rem;
    line-height: 1.5;
  }

  /* Install Guide Mobile */
  .guide-tabs {
    flex-direction: column;
  }

  .guide-tab {
    padding: 12px 16px;
    font-size: 0.88rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
  }

  .guide-tab.active {
    border-bottom: 2px solid var(--accent-primary);
  }

  .guide-content {
    padding: 20px 16px;
  }

  .guide-step {
    gap: 12px;
  }

  .step-num {
    width: 26px;
    height: 26px;
    font-size: 0.8rem;
  }

  .command-box {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 10px 12px;
  }

  .btn-copy {
    width: 100%;
    justify-content: center;
    padding: 8px 10px;
  }

  /* Specs Card Mobile */
  .specs-card {
    padding: 24px 18px;
  }

  .specs-info h3 {
    font-size: 1.3rem;
    word-break: keep-all;
  }

  .specs-info p {
    font-size: 0.9rem;
    line-height: 1.55;
  }

  /* FAQ Accordion Mobile */
  .faq-section {
    padding: 48px 0;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 0.95rem;
    word-break: keep-all;
  }

  .faq-answer {
    padding: 0 16px 16px;
    font-size: 0.88rem;
    line-height: 1.6;
  }

  /* Footer Mobile */
  .footer {
    padding: 36px 0;
  }

  .footer-container {
    flex-direction: column;
    text-align: center;
    align-items: center;
    gap: 18px;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    font-size: 0.85rem;
  }

  /* Toast Mobile */
  .toast {
    left: 16px;
    right: 16px;
    bottom: 20px;
    text-align: center;
    transform: translateY(120px);
  }
}