/* ============================================
   rust-psp GitHub Pages — PSP XMB-inspired theme
   ============================================ */

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

:root {
  --bg-deep: #0a0a0f;
  --bg-card: #12121a;
  --bg-code: #1a1a2e;
  --bg-hover: #1a1a28;
  --accent-blue: #4a9eff;
  --accent-purple: #7c5cff;
  --accent-cyan: #00d4aa;
  --text-primary: #e8e8f0;
  --text-muted: #8888aa;
  --text-dim: #555570;
  --border-color: #2a2a3e;
  --nav-height: 60px;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Source Code Pro', monospace;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --max-width: 1200px;
  --section-padding: 100px 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s;
}

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

img {
  max-width: 100%;
}

/* --- Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background 0.3s, box-shadow 0.3s;
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo .accent {
  color: var(--accent-blue);
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(74, 158, 255, 0.1);
}

.nav-github {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding: 6px 14px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: all 0.2s;
}

.nav-github:hover {
  color: var(--text-primary);
  border-color: var(--accent-blue);
  background: rgba(74, 158, 255, 0.08);
}

.nav-github svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-muted);
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav overlay (hidden by default, shown via JS on small screens) */
.nav-mobile {
  display: none;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(74, 158, 255, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 30% 60%, rgba(124, 92, 255, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 70% 70%, rgba(0, 212, 170, 0.05) 0%, transparent 50%);
  animation: heroShift 12s ease-in-out infinite alternate;
}

@keyframes heroShift {
  0% { transform: scale(1) translate(0, 0); }
  50% { transform: scale(1.05) translate(-1%, 2%); }
  100% { transform: scale(1) translate(1%, -1%); }
}

.hero-waves {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  overflow: hidden;
}

.hero-waves svg {
  position: absolute;
  bottom: 0;
  width: 200%;
  height: 100%;
}

.wave-1 { animation: waveDrift 8s ease-in-out infinite; opacity: 0.15; }
.wave-2 { animation: waveDrift 12s ease-in-out infinite reverse; opacity: 0.1; }

@keyframes waveDrift {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(-25%); }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -2px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple), var(--accent-cyan));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientText 6s ease-in-out infinite;
}

@keyframes gradientText {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  color: var(--text-primary);
  margin-bottom: 8px;
  font-weight: 300;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.stat-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 8px 20px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  background: rgba(18, 18, 26, 0.8);
  color: var(--text-primary);
}

.stat-badge .num {
  color: var(--accent-cyan);
  font-weight: 700;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(74, 158, 255, 0.3);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--accent-blue);
  background: rgba(74, 158, 255, 0.08);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* --- Sections --- */
section {
  padding: var(--section-padding);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header h2 .accent {
  color: var(--accent-blue);
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* --- Scroll Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-blue);
  box-shadow: 0 8px 40px rgba(74, 158, 255, 0.08);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
  width: 48px;
  height: 48px;
  line-height: 48px;
  text-align: center;
  border-radius: 12px;
  background: rgba(74, 158, 255, 0.1);
}

.feature-card h3 {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  margin-bottom: 8px;
}

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

/* --- Quick Start --- */
.quickstart-steps {
  max-width: 800px;
  margin: 0 auto;
}

.step {
  margin-bottom: 40px;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  width: 28px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff;
  flex-shrink: 0;
}

.step h3 {
  font-size: 1.05rem;
}

.step p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
  padding-left: 40px;
}

/* --- Code Blocks --- */
pre {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-left: 40px;
  position: relative;
}

pre .lang-label {
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

code {
  font-family: var(--font-mono);
}

/* Inline code */
p code, li code, td code {
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  color: var(--accent-cyan);
}

/* Syntax highlighting */
.kw { color: #c792ea; }        /* keywords */
.fn { color: #82aaff; }        /* functions */
.str { color: #c3e88d; }       /* strings */
.cm { color: #546e7a; }        /* comments */
.ty { color: #ffcb6b; }        /* types */
.mac { color: #89ddff; }       /* macros */
.num { color: #f78c6c; }       /* numbers */
.at { color: #ff5572; }        /* attributes */
.lf { color: #f07178; }       /* lifetime */

/* --- Modules --- */
.modules-section {
  background:
    linear-gradient(180deg, var(--bg-deep) 0%, rgba(18, 18, 26, 0.5) 50%, var(--bg-deep) 100%);
}

.module-categories {
  max-width: 900px;
  margin: 0 auto;
}

.module-category {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-card);
}

.module-category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  cursor: pointer;
  transition: background 0.2s;
  user-select: none;
}

.module-category-header:hover {
  background: var(--bg-hover);
}

.module-category-header h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.module-count {
  font-size: 0.75rem;
  color: var(--text-dim);
  background: rgba(74, 158, 255, 0.1);
  padding: 2px 8px;
  border-radius: 100px;
}

.module-chevron {
  font-size: 0.8rem;
  color: var(--text-dim);
  transition: transform 0.3s;
}

.module-category.open .module-chevron {
  transform: rotate(180deg);
}

.module-list {
  display: none;
  padding: 0 24px 16px;
}

.module-category.open .module-list {
  display: block;
}

.module-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 8px 0;
  border-top: 1px solid rgba(42, 42, 62, 0.5);
}

.module-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-blue);
  white-space: nowrap;
  min-width: 120px;
}

.module-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.module-types {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 2px;
}

/* --- Examples Gallery --- */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

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

.filter-btn.active {
  background: rgba(74, 158, 255, 0.15);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.example-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  transition: transform 0.2s, border-color 0.2s;
  display: flex;
  flex-direction: column;
}

.example-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-purple);
}

.example-card.hidden {
  display: none;
}

.example-card h4 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.example-tags {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.example-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(124, 92, 255, 0.12);
  color: var(--accent-purple);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.example-card p {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.45;
  flex: 1;
}

.example-card .view-source {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-blue);
  margin-top: 12px;
}

.example-card .view-source:hover {
  color: var(--accent-cyan);
}

/* --- Architecture --- */
.arch-diagram {
  max-width: 800px;
  margin: 0 auto;
}

.arch-block {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 32px;
}

.arch-block h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--accent-blue);
}

.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.arch-node {
  padding: 10px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-code);
  text-align: center;
  white-space: nowrap;
}

.arch-arrow {
  color: var(--text-dim);
  font-size: 1.1rem;
}

.arch-layers {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.arch-layer {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.arch-layer-bar {
  flex: 1;
  padding: 12px 16px;
  border-radius: 8px;
  text-align: center;
}

.arch-layer-bar.l4 {
  background: rgba(74, 158, 255, 0.15);
  border: 1px solid rgba(74, 158, 255, 0.3);
  color: var(--accent-blue);
}

.arch-layer-bar.l3 {
  background: rgba(124, 92, 255, 0.12);
  border: 1px solid rgba(124, 92, 255, 0.25);
  color: var(--accent-purple);
}

.arch-layer-bar.l2 {
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.2);
  color: var(--accent-cyan);
}

.arch-layer-bar.l1 {
  background: rgba(136, 136, 170, 0.08);
  border: 1px solid rgba(136, 136, 170, 0.15);
  color: var(--text-muted);
}

/* --- Tools --- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
  max-width: 900px;
  margin: 0 auto 40px;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 28px;
}

.tool-card h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--accent-cyan);
}

.tool-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.config-example {
  max-width: 700px;
  margin: 0 auto;
}

.config-example h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  margin-bottom: 12px;
  text-align: center;
}

.config-example pre {
  margin-left: 0;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 48px 0;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.footer-meta {
  color: var(--text-dim);
  font-size: 0.8rem;
  line-height: 1.8;
}

.footer-meta .version {
  font-family: var(--font-mono);
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  background: rgba(74, 158, 255, 0.1);
  color: var(--accent-blue);
  font-size: 0.75rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
    --nav-height: 56px;
  }

  .nav-links,
  .nav-github-desktop {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .nav-mobile {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(12px);
    z-index: 999;
    padding: 24px;
  }

  .nav-mobile.open {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .nav-mobile a {
    color: var(--text-muted);
    font-size: 1.1rem;
    padding: 14px 16px;
    border-radius: 8px;
    display: block;
    transition: background 0.2s, color 0.2s;
  }

  .nav-mobile a:hover,
  .nav-mobile a.active {
    background: rgba(74, 158, 255, 0.1);
    color: var(--text-primary);
  }

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

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

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

  pre {
    margin-left: 0;
    font-size: 0.8rem;
    padding: 16px;
  }

  .step p {
    padding-left: 0;
  }

  .arch-flow {
    flex-direction: column;
  }

  .hero-stats {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    letter-spacing: -1px;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .feature-card {
    padding: 24px;
  }

  .module-category-header {
    padding: 14px 16px;
  }
}