:root {
  --bg: #0d1117;
  --bg-elev: #151b23;
  --bg-card: #1a2029;
  --fg: #e6edf3;
  --fg-dim: #9da7b3;
  --fg-muted: #6b7380;
  --accent: #7ee787;
  --accent-dim: #4fa362;
  --accent-soft: rgba(126, 231, 135, 0.12);
  --border: #2a3139;
  --border-soft: #1f262d;
  --prompt: #79c0ff;
  --warn: #f0b957;
  --mono: ui-monospace, "Cascadia Mono", "Cascadia Code", "JetBrains Mono", "Fira Code", Consolas, Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(126, 231, 135, 0.08), transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 30%, rgba(121, 192, 255, 0.05), transparent 60%);
  background-attachment: fixed;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--fg); }

code, pre, kbd {
  font-family: var(--mono);
  font-size: 0.92em;
}

/* Nav ---------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(13, 17, 23, 0.75);
  border-bottom: 1px solid var(--border-soft);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
}
.brand-prompt { color: var(--accent); }
.brand-name { color: var(--fg); margin-left: 4px; }
.brand-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  margin-left: 3px;
  background: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  color: var(--fg-dim);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--fg); }

@media (max-width: 600px) {
  .nav-links a:not(:last-child) { display: none; }
}

/* Hero --------------------------------------------------------------------- */
.hero {
  padding: 80px 24px 100px;
  text-align: center;
}
.hero-inner {
  max-width: 1000px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  margin-bottom: 24px;
}
.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}
.hero-keycap {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(180deg, #252c36, #1a2029);
  border: 1px solid var(--border);
  border-bottom-width: 3px;
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 28px;
  color: var(--accent);
  text-shadow: 0 0 12px rgba(126, 231, 135, 0.4);
}
.hero-title-text {
  background: linear-gradient(180deg, #ffffff, #c9d1d9);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-bottom: 0.12em;
}

.hero-sub {
  font-size: clamp(15px, 2vw, 18px);
  color: var(--fg-dim);
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  font-family: var(--sans);
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #0d1117;
  box-shadow: 0 0 0 rgba(126, 231, 135, 0);
}
.btn-primary:hover {
  background: #96f6a0;
  color: #0d1117;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(126, 231, 135, 0.25);
}
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-ghost:hover {
  background: var(--bg-card);
  color: var(--fg);
  border-color: var(--fg-dim);
}
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-arrow {
  transition: transform 0.15s ease;
}
.btn-primary:hover .btn-arrow { transform: translateX(3px); }

/* Terminal demo ------------------------------------------------------------ */
.terminal-demo {
  max-width: 720px;
  margin: 0 auto;
  background: #0b0f14;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(126, 231, 135, 0.04),
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 80px rgba(126, 231, 135, 0.06);
  text-align: left;
}
.terminal-bar {
  background: #151b23;
  border-bottom: 1px solid var(--border);
  padding: 6px 10px 0;
  display: flex;
}
.terminal-tabs {
  display: flex;
  gap: 2px;
}
.terminal-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: transparent;
  border-radius: 6px 6px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-muted);
}
.terminal-tab.active {
  background: #0b0f14;
  color: var(--fg);
}
.tab-close {
  opacity: 0.4;
  font-size: 14px;
}
.terminal-body {
  padding: 20px 22px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  min-height: 180px;
}
.terminal-line { white-space: pre; overflow: hidden; text-overflow: ellipsis; }
.term-prompt { color: var(--prompt); }
.term-cmd { color: var(--fg); }
.term-dim { color: var(--fg-muted); }
.term-cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1.1s steps(1) infinite;
}

/* Sections ----------------------------------------------------------------- */
.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  text-align: center;
}
.section-sub {
  color: var(--fg-dim);
  font-size: 17px;
  text-align: center;
  margin: 0 0 48px;
}

/* Features grid ------------------------------------------------------------ */
.features { border-top: 1px solid var(--border-soft); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--border);
  background: var(--bg-elev);
}
.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
  line-height: 1;
}
.feature-card h3 {
  font-size: 17px;
  margin: 0 0 8px;
  font-weight: 600;
}
.feature-card p {
  margin: 0;
  color: var(--fg-dim);
  font-size: 14px;
  line-height: 1.6;
}

/* Quick start -------------------------------------------------------------- */
.quickstart {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elev) 100%);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.qs-steps {
  display: grid;
  gap: 16px;
  max-width: 760px;
  margin: 0 auto;
}
.qs-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 12px;
  padding: 24px;
}
.qs-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.qs-step-content h3 {
  margin: 4px 0 6px;
  font-size: 17px;
}
.qs-step-content p {
  margin: 0 0 12px;
  color: var(--fg-dim);
  font-size: 14px;
}
.qs-step-content code {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--prompt);
}
kbd {
  display: inline-block;
  padding: 2px 8px;
  background: #252c36;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  color: var(--accent);
  font-size: 0.9em;
}

.qs-note {
  max-width: 760px;
  margin: 28px auto 0;
  padding: 16px 20px;
  background: rgba(240, 185, 87, 0.08);
  border: 1px solid rgba(240, 185, 87, 0.25);
  border-radius: 10px;
  color: var(--fg-dim);
  font-size: 13px;
  line-height: 1.6;
}
.qs-note strong { color: var(--warn); }
.qs-note a { color: var(--warn); text-decoration: underline; text-decoration-color: rgba(240, 185, 87, 0.4); }

/* Build section ------------------------------------------------------------ */
.code-block {
  max-width: 720px;
  margin: 0 auto;
  background: #0b0f14;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 24px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.8;
}
.code-block code { white-space: pre; }
.code-comment { color: var(--fg-muted); }
.code-cmd { color: var(--accent); }

/* Footer ------------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: 48px 24px 32px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 32px;
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col h4 {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--fg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.footer-col a {
  color: var(--fg-dim);
  font-size: 14px;
}
.footer-col a:hover { color: var(--accent); }
.footer-muted {
  color: var(--fg-muted);
  font-size: 13px;
  font-family: var(--mono);
}