:root {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: #0f172a;
  --bg-card-hover: #172033;
  --border-subtle: #334155;
  --border-accent: #38bdf8;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #38bdf8;
  --accent-cyan-dark: #0284c7;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-purple: #a855f7;
  --accent-amber: #f59e0b;
  --code-bg: #030712;
  --code-header-bg: rgba(17, 24, 39, 0.8);
  --header-bg: rgba(9, 13, 22, 0.88);
  --table-header-bg: rgba(3, 7, 18, 0.8);
  --table-hover-bg: rgba(31, 41, 55, 0.4);
  --detail-grid-bg: rgba(3, 7, 18, 0.6);
  --note-box-bg: rgba(30, 41, 59, 0.6);
  --download-highlight-bg: linear-gradient(180deg, rgba(56, 189, 248, 0.05) 0%, rgba(17, 24, 39, 0.9) 100%);
  --modal-overlay-bg: rgba(3, 7, 18, 0.8);
  --btn-primary-bg: #38bdf8;
  --btn-primary-hover-bg: #7dd3fc;
  --btn-primary-text: #0b0f19;
  --btn-primary-shadow: 0 4px 14px rgba(56, 189, 248, 0.35);
  --btn-primary-hover-shadow: 0 6px 20px rgba(56, 189, 248, 0.5);
  --btn-outline-border: rgba(56, 189, 248, 0.4);
  --btn-outline-hover-bg: rgba(56, 189, 248, 0.1);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(56, 189, 248, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --container-max: 1100px;
  --transition-fast: 150ms ease;
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --border-subtle: #e2e8f0;
  --border-accent: #0284c7;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent-cyan: #0284c7;
  --accent-cyan-dark: #0369a1;
  --accent-blue: #2563eb;
  --accent-green: #059669;
  --accent-purple: #7c3aed;
  --accent-amber: #d97706;
  --code-bg: #0f172a;
  --code-header-bg: #1e293b;
  --header-bg: rgba(255, 255, 255, 0.88);
  --table-header-bg: #f1f5f9;
  --table-hover-bg: #f8fafc;
  --detail-grid-bg: #f1f5f9;
  --note-box-bg: #f1f5f9;
  --download-highlight-bg: linear-gradient(180deg, rgba(2, 132, 199, 0.06) 0%, #ffffff 100%);
  --modal-overlay-bg: rgba(15, 23, 42, 0.5);
  --btn-primary-bg: #0284c7;
  --btn-primary-hover-bg: #0369a1;
  --btn-primary-text: #ffffff;
  --btn-primary-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
  --btn-primary-hover-shadow: 0 6px 18px rgba(2, 132, 199, 0.35);
  --btn-outline-border: rgba(2, 132, 199, 0.4);
  --btn-outline-hover-bg: rgba(2, 132, 199, 0.08);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(2, 132, 199, 0.12);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  position: relative;
  overflow-x: hidden;
}

/* Background Interactive Canvas Layer */
#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.brand-icon {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-sm);
  display: block;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

.nav-link.active {
  color: var(--accent-cyan);
  background-color: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle-btn:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 1.125rem;
  height: 1.125rem;
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: block;
}

[data-theme="light"] .theme-icon-sun {
  display: block;
}

[data-theme="light"] .theme-icon-moon {
  display: none;
}

.nav-github-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.nav-github-btn:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-1px);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 4.25rem;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: 1.5rem;
  z-index: 49;
  flex-direction: column;
  gap: 1rem;
}

.mobile-drawer.open {
  display: flex;
}

.mobile-drawer .nav-link {
  font-size: 1.125rem;
  padding: 0.75rem 1rem;
}

/* Main Content Layout */
main {
  flex: 1;
}

/* Hero Section */
.hero-section {
  padding: 5rem 0 3.5rem;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background-color: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.hero-title-highlight {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1875rem;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto 2.25rem;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

/* Button UI Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.4rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  line-height: 1;
}

.btn-primary {
  background-color: var(--btn-primary-bg, var(--accent-cyan));
  color: var(--btn-primary-text, #0b0f19);
  box-shadow: var(--btn-primary-shadow, 0 4px 14px rgba(56, 189, 248, 0.35));
}

.btn-primary:hover {
  background-color: var(--btn-primary-hover-bg, #7dd3fc);
  box-shadow: var(--btn-primary-hover-shadow, 0 6px 20px rgba(56, 189, 248, 0.5));
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--text-secondary);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--accent-cyan);
  border-color: var(--btn-outline-border, rgba(56, 189, 248, 0.4));
}

.btn-outline:hover {
  background-color: var(--btn-outline-hover-bg, rgba(56, 189, 248, 0.1));
  border-color: var(--accent-cyan);
}

.btn-sm {
  padding: 0.45rem 0.8rem;
  font-size: 0.8125rem;
}

.btn-icon {
  width: 1.125rem;
  height: 1.125rem;
}

/* Metrics Bar */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 4rem;
}

.metric-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  text-align: center;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.metric-card:hover {
  border-color: rgba(56, 189, 248, 0.35);
  transform: translateY(-2px);
}

.metric-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 0.25rem;
}

.metric-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* Section Header */
.section-header {
  margin-bottom: 2.5rem;
  text-align: left;
}

.section-header.text-center {
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.section-description {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 680px;
}

.section-header.text-center .section-description {
  margin-left: auto;
  margin-right: auto;
}

/* Feature Showcase Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4.5rem;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  border-color: var(--accent-cyan);
  background-color: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.feature-icon-wrapper {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-sm);
  background-color: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent-cyan);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

/* Standardized Project Showcase Card (Used for SubtitleGo and Future Projects) */
.project-showcase-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.project-showcase-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue), var(--accent-purple));
  opacity: 0.8;
}

.project-showcase-card:hover {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: var(--shadow-glow);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.project-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.project-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.project-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-version {
  background-color: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-cyan);
}

.badge-status-active {
  background-color: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
}

.badge-status-planned {
  background-color: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--accent-amber);
}

.badge-license {
  background-color: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: var(--accent-purple);
}

.project-description {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.project-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.75rem;
  background-color: var(--detail-grid-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.detail-block-title {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.detail-block-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.detail-block-item {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.detail-bullet {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  margin-top: 0.55rem;
  flex-shrink: 0;
}

.tech-tags-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tech-tag {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.project-actions-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

/* Hardware & Platform Matrix Table */
.matrix-container {
  overflow-x: auto;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 4.5rem;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.matrix-table th {
  background-color: var(--table-header-bg);
  padding: 1rem 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
  text-transform: uppercase;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
}

.matrix-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: top;
}

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

.matrix-table tr:hover td {
  background-color: var(--table-hover-bg);
}

.status-badge {
  display: inline-block;
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--accent-green);
}

/* Code Snippet Box with Copy Button */
.code-box {
  background-color: var(--code-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  position: relative;
  margin: 1rem 0 1.5rem;
  overflow: hidden;
}

.code-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background-color: var(--code-header-bg);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.code-box pre {
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  color: #e5e7eb;
}

.copy-btn {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-cyan);
}

/* Download Section Cards */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4.5rem;
}

.download-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.download-card.highlight {
  border-color: var(--border-accent);
  background: var(--download-highlight-bg);
}

.download-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.download-card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.55;
}

/* About Creator Profile Layout */
.about-hero {
  padding: 3.5rem 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 3rem;
  align-items: start;
}

.author-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  position: sticky;
  top: 6rem;
}

.author-avatar {
  width: 7rem;
  height: 7rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  font-size: 2.25rem;
  font-weight: 800;
  color: #fff;
  border: 3px solid rgba(56, 189, 248, 0.4);
}

.author-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.author-role {
  font-size: 0.875rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.author-bio {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

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

.about-content-body {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.about-block {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.about-block-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.about-block p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.about-block p:last-child {
  margin-bottom: 0;
}

/* Modal Dialog for Download Placeholder */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--modal-overlay-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.open {
  display: flex;
}

.modal-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 2rem;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
  animation: modalFadeIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-close-btn {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

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

.modal-icon-badge {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background-color: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 1.25rem;
}

.modal-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.modal-message {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* Toast Alert Component */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 110;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-accent);
  color: var(--text-primary);
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: toastSlideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 380px;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Site Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-primary);
  padding: 3rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(2, 1fr);
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 360px;
}

.footer-heading {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(55, 65, 81, 0.5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Breadcrumb Navigation */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--accent-cyan);
}

.breadcrumb-separator {
  color: var(--text-muted);
}

/* Dedicated Project Hero */
.project-header-section {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 3rem;
}

.project-meta-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.project-page-title {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.15;
}

.project-page-lead {
  font-size: 1.1875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 820px;
  margin-bottom: 2rem;
}

/* Documentation Content Sections */
.doc-section {
  margin-bottom: 3.5rem;
}

.doc-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.doc-text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.step-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-sm);
  background-color: rgba(56, 189, 248, 0.15);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 0.8125rem;
}

.step-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.note-box {
  background-color: var(--note-box-bg);
  border-left: 3px solid var(--accent-cyan);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 1.25rem 0;
  line-height: 1.6;
}

.note-box strong {
  color: var(--text-primary);
}

/* Modern Project Cards for Homepage & Catalog */
.project-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.modern-project-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.card-top-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex: 1;
}

.card-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.view-project-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.modern-project-card:hover .view-project-link {
  text-decoration: underline;
}

/* Responsive Media Queries */
@media (max-width: 960px) {
  .hero-title {
    font-size: 2.35rem;
  }
  
  .project-page-title {
    font-size: 2.25rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .author-card {
    position: static;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-github-btn {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .project-page-title {
    font-size: 1.75rem;
  }

  .features-grid, .download-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .project-showcase-card {
    padding: 1.5rem;
  }
  
  .project-details-grid {
    grid-template-columns: 1fr;
  }
}