/* ============================================
   Julie Site — CSS Foundation
   ============================================ */

/* --- Theme Variables --- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-terminal: #0d0d14;
  --bg-card: #16161f;
  --bg-nav: rgba(10, 10, 15, 0.9);

  --text-primary: #e0e0e8;
  --text-secondary: #8888a0;
  --text-muted: #55556a;

  --accent-green: #00ff88;
  --accent-blue: #6495ed;
  --accent-purple: #a78bfa;
  --accent-red: #ff4444;
  --accent-yellow: #ffc107;
  --accent-orange: #ff8c00;
  --accent-cyan: #00c8ff;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "SF Mono", Consolas, monospace;

  --max-width: 1100px;
  --section-padding: 100px 24px;
  --border-radius: 8px;
  --terminal-radius: 10px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent-green);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --- Layout --- */
.section {
  padding: var(--section-padding);
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 48px;
  max-width: 600px;
}

/* --- Sticky Nav --- */
.sticky-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}

.sticky-nav.visible {
  transform: translateY(0);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
}

.nav-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-green);
}

.nav-logo:hover {
  text-decoration: none;
}

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

.nav-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  text-decoration: none;
}

/* --- Terminal Block --- */
.terminal {
  background: var(--bg-terminal);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--terminal-radius);
  padding: 20px 24px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  overflow-x: auto;
  position: relative;
}

.terminal-header {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal .prompt { color: var(--text-muted); }
.terminal .command { color: var(--accent-green); }
.terminal .result { color: var(--text-primary); }
.terminal .comment { color: var(--text-muted); }
.terminal .highlight { color: var(--accent-cyan); }
.terminal .warn { color: var(--accent-yellow); }
.terminal .error { color: var(--accent-red); }

/* Blinking cursor for non-hero terminal demos */
.terminal .cursor {
  display: inline-block;
  width: 8px;
  height: 1.1em;
  background: var(--accent-green);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* --- Side-by-side panels --- */
.split-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* --- Card grid --- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--border-radius);
  padding: 24px;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

/* --- Scroll animation base --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .terminal .cursor { animation: none; opacity: 1; }
  .sticky-nav { transition: none; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --section-padding: 60px 16px;
  }

  .split-panels,
  .card-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .nav-links::-webkit-scrollbar { display: none; }

  .section-title { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .nav-links a { font-size: 0.75rem; }
  .terminal { font-size: 0.75rem; padding: 14px 16px; }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  text-align: center;
  position: relative;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--accent-green);
  margin-bottom: 12px;
  letter-spacing: -1px;
}

.hero-tagline {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 48px;
  max-width: 500px;
}

/* Context window progress bar */
.context-bar-container {
  width: 100%;
  max-width: 600px;
  margin-bottom: 24px;
}

.context-bar-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.context-bar {
  width: 100%;
  height: 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.context-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 12px;
  transition: width 0.3s ease, background 0.3s ease;
  background: var(--accent-green);
}

.context-bar-fill.warning { background: var(--accent-yellow); }
.context-bar-fill.danger { background: var(--accent-red); }

/* File read log */
.file-reads {
  width: 100%;
  max-width: 600px;
  text-align: left;
  min-height: 200px;
}

.file-read-line {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 4px 0;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.file-read-line.visible {
  opacity: 1;
  transform: translateX(0);
}

.file-read-line .filename { color: var(--text-secondary); }
.file-read-line .tokens { color: var(--accent-orange); }
.file-read-line .julie-cmd { color: var(--accent-green); }
.file-read-line .julie-result { color: var(--accent-cyan); }

.hero-message {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  margin-top: 20px;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.hero-message.visible { opacity: 1; }
.hero-message.problem { color: var(--accent-red); }
.hero-message.solution { color: var(--accent-green); }

/* CTA buttons */
.hero-ctas {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.hero-ctas.visible { opacity: 1; }

/* Scroll hint arrow */
.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  animation: bounce 2s ease infinite;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.scroll-hint.visible {
  opacity: 1;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-8px); }
  60% { transform: translateX(-50%) translateY(-4px); }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-hint { animation: none; opacity: 1; }
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  border: none;
  text-decoration: none;
}

.btn:hover { transform: translateY(-1px); text-decoration: none; }

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

.btn-primary:hover { background: #00e07a; }

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .hero-tagline { font-size: 1rem; }
  .hero-ctas { flex-direction: column; align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  .file-read-line {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-message, .hero-ctas {
    opacity: 1;
    transition: none;
  }
  .context-bar-fill { transition: none; }
}

/* ============================================
   Token Savings Table
   ============================================ */
.savings-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 8px;
}

.savings-table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-align: left;
  padding: 8px 16px;
}

.savings-table td {
  padding: 16px;
  font-size: 0.95rem;
}

.savings-table tr.data-row {
  background: var(--bg-card);
}

.savings-table tr.data-row td:first-child {
  border-radius: var(--border-radius) 0 0 var(--border-radius);
  color: var(--text-primary);
}

.savings-table tr.data-row td:last-child {
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.savings-table .without {
  color: var(--accent-red);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.savings-table .with-julie {
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.savings-table .savings-pct {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-green);
}

.savings-icon {
  display: inline-block;
  margin-right: 6px;
  font-size: 0.85rem;
}

/* Savings table rows slide in from left (not up) */
.savings-table tr.animate-on-scroll {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.savings-table tr.animate-on-scroll.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Savings percentage pulse on appear */
@keyframes pulse-savings {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

.savings-table tr.animate-on-scroll.visible .savings-pct {
  animation: pulse-savings 0.4s ease 0.3s;
}

@media (max-width: 768px) {
  .savings-table { font-size: 0.85rem; }
  .savings-table td { padding: 12px 10px; }
  .savings-table th { font-size: 0.65rem; }
}

@media (prefers-reduced-motion: reduce) {
  .savings-table tr.animate-on-scroll {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .savings-table tr.animate-on-scroll.visible .savings-pct {
    animation: none;
  }
}

/* ============================================
   How It Works — 3-Step Flow
   ============================================ */
.steps-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  position: relative;
}

.step {
  flex: 1;
  max-width: 280px;
  text-align: center;
  padding: 0 20px;
}

.step-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-green);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.step h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* SVG arrows between steps */
.step-arrow {
  width: 60px;
  flex-shrink: 0;
  align-self: center;
  margin-top: -20px;
}

.step-arrow line {
  stroke: rgba(255, 255, 255, 0.15);
  stroke-width: 2;
}

.step-arrow polygon {
  fill: rgba(255, 255, 255, 0.15);
}

@media (max-width: 768px) {
  .steps-flow {
    flex-direction: column;
    align-items: center;
    gap: 24px;
  }
  .step-arrow {
    transform: rotate(90deg);
    width: 40px;
    margin-top: 0;
  }
}

/* ============================================
   Reference Graph
   ============================================ */
.graph-container {
  width: 100%;
  max-width: 700px;
  margin: 0 auto 32px;
}

.graph-container svg {
  width: 100%;
  height: auto;
}

.graph-node {
  cursor: default;
}

.graph-node rect {
  rx: 8;
  ry: 8;
  fill: var(--bg-card);
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 1;
  transition: filter 0.3s;
}

.graph-node text {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--text-primary);
  text-anchor: middle;
  dominant-baseline: central;
}

.graph-node.central rect {
  fill: rgba(0, 255, 136, 0.1);
  stroke: var(--accent-green);
  stroke-width: 1.5;
}

.graph-node.central text {
  fill: var(--accent-green);
  font-weight: 700;
}

.graph-edge {
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
}

.graph-edge.callers { stroke: var(--accent-blue); }
.graph-edge.callees { stroke: var(--accent-green); }
.graph-edge.types { stroke: var(--accent-purple); }

/* Edge labels */
.graph-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.graph-label.callers { fill: var(--accent-blue); }
.graph-label.callees { fill: var(--accent-green); }
.graph-label.types { fill: var(--accent-purple); }

/* stroke-dashoffset entrance animation
   Default state: visible (works without JS). JS adds .graph-animate-ready
   to hide elements, then .shown/.drawn to reveal them on scroll. */
.graph-animate-ready .graph-edge-animated {
  transition: stroke-dashoffset 0.8s ease;
  /* stroke-dasharray/offset set by JS using getTotalLength() */
}

.graph-edge-animated.drawn {
  stroke-dashoffset: 0 !important;
}

.graph-animate-ready .graph-node-animated {
  opacity: 0;
  transition: opacity 0.4s ease;
}

.graph-node-animated.shown {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .graph-animate-ready .graph-edge-animated {
    stroke-dashoffset: 0 !important;
    transition: none;
  }
  .graph-animate-ready .graph-node-animated {
    opacity: 1;
    transition: none;
  }
}

/* Visually hidden for screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ============================================
   Tools Showcase
   ============================================ */
.tool-card .tool-name {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-green);
  margin-bottom: 4px;
}

.tool-card .tool-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.tool-card .terminal {
  font-size: 0.78rem;
  margin-bottom: 12px;
}

.token-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-green);
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.15);
  padding: 3px 10px;
  border-radius: 12px;
}

/* ============================================
   Language Badge Grid
   ============================================ */
.lang-category {
  margin-bottom: 24px;
}

.lang-category-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.lang-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.lang-badge {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================
   Performance Stats
   ============================================ */
.perf-stats {
  display: flex;
  justify-content: center;
  gap: 80px;
  margin-bottom: 24px;
}

.perf-stat {
  text-align: center;
}

.perf-number {
  font-family: var(--font-mono);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--accent-green);
  line-height: 1;
  margin-bottom: 8px;
}

.perf-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.perf-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .perf-stats { gap: 32px; }
  .perf-number { font-size: 2.2rem; }
}

/* ============================================
   Installation — Tabbed Code Blocks
   ============================================ */
.install-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 0;
}

.install-tab {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 10px 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.install-tab:hover { color: var(--text-secondary); }

.install-tab.active {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}

.install-panel {
  display: none;
}

.install-panel.active {
  display: block;
}

.install-terminal {
  border-radius: 0 0 var(--terminal-radius) var(--terminal-radius);
  border-top: none;
}

/* Copy button */
.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.copy-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.copy-btn.copied {
  color: var(--accent-green);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 32px 24px;
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-inner a {
  color: var(--text-secondary);
}

.footer-sep {
  color: rgba(255, 255, 255, 0.1);
}