/* ============================================================
   Varta Landing Page — Style
   Aesthetic: Terminal-hacker meets retro-arcade. Polished, not gritty.
   ============================================================ */

/* --- Tokens --- */
:root {
  --bg: #0a0a0a;
  --bg-surface: #111111;
  --bg-elevated: #1a1a1a;
  --border: #222222;
  --text-primary: #e4e4e4;
  --text-secondary: #999999;
  --text-dim: #666666;
  --accent: #22d3ee;
  --accent-dim: #0e7490;
  --accent-glow: rgba(34, 211, 238, 0.12);
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #eab308;
  --font-display: 'Press Start 2P', monospace;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1100px;
  --section-pad: 5.5rem;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--font-mono); font-size: 0.88em; }

/* --- Nav --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 2rem;
  background: transparent;
  transition: background 0.2s, border-color 0.2s;
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.nav-wordmark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.15em;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-wordmark:hover { color: var(--accent); text-decoration: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover { color: var(--accent); text-decoration: none; }
.nav-links svg { opacity: 0.6; transition: opacity 0.15s; }
.nav-links a:hover svg { opacity: 1; }

/* --- Hero --- */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 6rem 2rem 5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 2.8rem;
  line-height: 1.1;
  color: var(--text-primary);
  text-shadow:
    0 0 30px var(--accent-glow),
    0 0 60px rgba(34, 211, 238, 0.06);
  margin-bottom: 1.5rem;
  letter-spacing: 0.08em;
}

.hero-tagline {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.hero-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 420px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--accent-dim);
  border-radius: 6px;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  position: relative;
}

.cta-primary:hover {
  background: rgba(34, 211, 238, 0.08);
  border-color: var(--accent);
}

.cta-prompt { color: var(--text-dim); }

.cta-hint {
  position: absolute;
  bottom: -1.4rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  color: var(--text-dim);
  opacity: 0;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.cta-primary:hover .cta-hint { opacity: 1; }

.cta-primary.copied {
  border-color: var(--success);
  color: var(--success);
}

.cta-primary.copied::after {
  content: 'copied!';
  font-size: 0.7rem;
  margin-left: 0.5rem;
}

.cta-secondary {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.15s;
}

.cta-secondary:hover { color: var(--accent); }

/* --- Terminal Mockup --- */
.hero-terminal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px var(--border),
    0 0 40px var(--accent-glow),
    0 20px 60px rgba(0, 0, 0, 0.4);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.7rem 1rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

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

.terminal-dot--red { background: #ef4444; }
.terminal-dot--yellow { background: #eab308; }
.terminal-dot--green { background: #22c55e; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-right: 40px; /* offset for dots */
}

.terminal-body {
  padding: 1.2rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.9;
  overflow-x: auto;
}

.terminal-line { white-space: nowrap; }

.t-prompt { color: var(--text-dim); }
.t-cmd { color: var(--text-primary); font-weight: 700; }
.t-flag { color: var(--accent-dim); }
.t-num { color: var(--accent); }
.t-info { color: var(--text-dim); }
.t-ok { color: var(--success); font-weight: 700; }
.t-warn { color: var(--warning); font-weight: 700; }
.t-path { color: var(--text-secondary); }

.t-cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* --- Dividers --- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  max-width: var(--max-width);
  margin: 0 auto;
}

/* --- Sections --- */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-pad) 2rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 2.5rem;
}

/* --- Steps --- */
.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: transparent;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 560px;
}

.step-content code {
  color: var(--accent);
  background: var(--bg-elevated);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-size: 0.82em;
}

/* --- Metrics --- */
.metrics {
  display: flex;
  gap: 4rem;
  flex-wrap: wrap;
}

.metric {
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 0.3rem;
}

.metric-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.metrics-footnote {
  margin-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
}

.metrics-footnote code {
  color: var(--text-dim);
  font-size: 1em;
}

/* --- Crate List --- */
.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.cta-github {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #888;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.cta-github:hover {
  color: #fff;
}

.crate-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.crate-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows: auto auto;
  align-items: baseline;
  gap: 0 0.75rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: background 0.15s;
}

.crate-row:first-child { border-top: 1px solid var(--border); }
.crate-row:hover { background: var(--bg-surface); text-decoration: none; }

.crate-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
  grid-column: 1;
  grid-row: 1;
}

.crate-dots {
  grid-column: 2;
  grid-row: 1;
  border-bottom: 1px dotted var(--border);
  margin-bottom: 0.25em;
  min-width: 20px;
}

.crate-arrow {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-dim);
  grid-column: 3;
  grid-row: 1;
  transition: color 0.15s, transform 0.15s;
}

.crate-row:hover .crate-arrow {
  color: var(--accent);
  transform: translateX(3px);
}

.crate-desc {
  grid-column: 1 / -1;
  grid-row: 2;
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* --- Footer --- */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-dim);
  transition: color 0.15s;
}

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

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root { --section-pad: 3.5rem; }

  .nav { padding: 0.75rem 1.25rem; }

  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.75rem; }

  .hero {
    grid-template-columns: 1fr;
    padding: 3.5rem 1.25rem 3rem;
    gap: 2.5rem;
  }

  .hero-title { font-size: 2rem; }
  .hero-tagline { font-size: 1.05rem; }

  .hero-cta { flex-direction: column; align-items: flex-start; gap: 1rem; }

  .terminal-body { font-size: 0.72rem; padding: 1rem; }
  .terminal-line { white-space: nowrap; }

  .section { padding: var(--section-pad) 1.25rem; }

  .metrics { gap: 2.5rem; }
  .metric-value { font-size: 1.8rem; }

  .footer {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
    padding: 1.5rem 1.25rem;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .hero { gap: 2rem; padding: 5rem 2rem 4rem; }
  .hero-title { font-size: 2.2rem; }
  .metrics { gap: 3rem; }
}