/* =========================================================
   Shell Sage — Neon Terminal Theme
   ========================================================= */

:root {
  --bg: #05050a;
  --bg-alt: #0a0a14;
  --panel: #0d0d18;
  --panel-border: rgba(0, 255, 242, 0.18);

  --neon-cyan: #00fff2;
  --neon-pink: #ff2bd6;
  --neon-purple: #a855f7;
  --neon-green: #39ff14;

  --text: #e9eefb;
  --text-dim: #93a0bd;
  --text-dimmer: #5f6a86;

  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  --font-display: 'Orbitron', var(--font-mono);

  --radius: 14px;
  --container-w: 1120px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

::selection {
  background: var(--neon-pink);
  color: #05050a;
}

a { color: var(--neon-cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--font-mono);
  background: rgba(0, 255, 242, 0.08);
  padding: 0.15em 0.45em;
  border-radius: 5px;
  color: var(--neon-cyan);
  font-size: 0.92em;
}

kbd {
  font-family: var(--font-mono);
  background: #111122;
  border: 1px solid var(--panel-border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0.1em 0.5em;
  font-size: 0.85em;
  color: var(--text);
}

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

.accent-cyan { color: var(--neon-cyan); }
.accent-pink { color: var(--neon-pink); }
.accent-purple { color: var(--neon-purple); }

.glow-cyan { text-shadow: 0 0 8px rgba(0,255,242,0.9), 0 0 26px rgba(0,255,242,0.55), 0 0 60px rgba(0,255,242,0.3); }

/* ---------- background fx ---------- */
.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 255, 242, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 242, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 40%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, black 40%, transparent 90%);
}

.scanline {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.015) 0px,
    rgba(255,255,255,0.015) 1px,
    transparent 2px,
    transparent 3px
  );
  opacity: 0.5;
}

main, header, footer { position: relative; z-index: 2; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 5, 10, 0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--panel-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 30px;
  height: 30px;
  filter: drop-shadow(0 0 6px rgba(0,255,242,0.6));
}

.brand-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  color: var(--text);
  text-transform: lowercase;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover {
  color: var(--neon-cyan);
  text-decoration: none;
}

.nav-link--github {
  color: var(--neon-pink);
  border: 1px solid rgba(255, 43, 214, 0.4);
  padding: 6px 14px;
  border-radius: 8px;
}
.nav-link--github:hover {
  box-shadow: 0 0 14px rgba(255, 43, 214, 0.5);
  color: var(--neon-pink);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--neon-cyan);
  display: block;
}

/* ---------- hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
  padding: 96px 24px 80px;
}

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 2.5px;
  color: var(--neon-purple);
  font-weight: 700;
  margin: 0 0 18px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  line-height: 1.05;
  margin: 0 0 20px;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--text);
}

.hero-sub {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 0 32px;
}

.hero-sub strong { color: var(--text); }

.install-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 14px 16px;
  max-width: 560px;
  box-shadow: 0 0 0 1px rgba(0,255,242,0.03), 0 0 30px rgba(0,255,242,0.08);
  margin-bottom: 28px;
}

.install-label {
  color: var(--neon-green);
  font-weight: 700;
}

.install-bar code {
  background: none;
  padding: 0;
  color: var(--text);
  flex: 1;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow-x: auto;
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 7px 14px;
  border-radius: 7px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.copy-btn:hover {
  background: var(--neon-cyan);
  color: #05050a;
  box-shadow: 0 0 16px rgba(0,255,242,0.6);
}
.copy-btn.is-copied {
  background: var(--neon-green);
  border-color: var(--neon-green);
  color: #05050a;
}

.copy-btn--block {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 5px 12px;
  font-size: 0.72rem;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 12px 24px;
  border-radius: 9px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn--primary {
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  color: #050510;
  box-shadow: 0 0 22px rgba(0,255,242,0.35);
}
.btn--primary:hover {
  box-shadow: 0 0 30px rgba(0,255,242,0.6);
  text-decoration: none;
}
.btn--ghost {
  border-color: var(--panel-border);
  color: var(--text);
  background: rgba(255,255,255,0.02);
}
.btn--ghost:hover {
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  text-decoration: none;
}

.hero-badges {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 0;
  margin: 0;
  color: var(--text-dimmer);
  font-size: 0.82rem;
}

/* ---------- hero terminal mockup ---------- */
.terminal-window {
  background: #0b0b16;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(255,43,214,0.05), 0 30px 70px -20px rgba(0,0,0,0.7), 0 0 60px rgba(168,85,247,0.15);
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  background: #0f0f1c;
  border-bottom: 1px solid var(--panel-border);
}

.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot--red { background: #ff5f56; }
.dot--yellow { background: #ffbd2e; }
.dot--green { background: #27c93f; }

.terminal-title {
  margin-left: 8px;
  color: var(--text-dimmer);
  font-size: 0.78rem;
}

.terminal-body {
  padding: 22px 20px 28px;
  min-height: 220px;
  font-size: 0.92rem;
}

.terminal-body .line {
  margin: 0 0 10px;
  color: var(--text);
  word-break: break-word;
}

.prompt {
  color: var(--neon-green);
  font-weight: 700;
  margin-right: 8px;
}

.cursor {
  color: var(--neon-cyan);
  animation: blink 1s steps(1) infinite;
}

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

.typed-output p {
  margin: 0 0 6px;
  color: var(--text-dim);
}
.typed-output p.cmd-line { color: var(--neon-green); }
.typed-output p.hint-line { color: var(--text-dimmer); }
.typed-output p.ok-line { color: var(--neon-cyan); }

/* ---------- sections ---------- */
.section {
  padding: 96px 0;
}
.section--alt {
  background: linear-gradient(180deg, transparent, rgba(168,85,247,0.04) 20%, rgba(0,255,242,0.03) 80%, transparent);
  border-top: 1px solid rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 800;
  margin: 0 0 12px;
  text-align: center;
}

.section-sub {
  text-align: center;
  color: var(--text-dim);
  max-width: 620px;
  margin: 0 auto 52px;
}

/* ---------- grid / cards ---------- */
.grid {
  display: grid;
  gap: 24px;
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); margin-bottom: 24px; }

.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--neon-cyan);
  box-shadow: 0 12px 40px -12px rgba(0,255,242,0.25);
}
.card-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
  filter: drop-shadow(0 0 10px rgba(0,255,242,0.5));
}
.card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text);
}
.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
}

/* ---------- demo ---------- */
.demo-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.demo-tab, .install-tab {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.demo-tab:hover, .install-tab:hover {
  color: var(--neon-cyan);
  border-color: var(--neon-cyan);
}
.demo-tab.is-active, .install-tab.is-active {
  color: #05050a;
  background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
  border-color: transparent;
  box-shadow: 0 0 20px rgba(0,255,242,0.35);
}

.demo-panel {
  display: none;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}
.demo-panel.is-active {
  display: block;
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.demo-video {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  box-shadow: 0 0 50px rgba(168,85,247,0.18), 0 20px 60px -20px rgba(0,0,0,0.7);
  background: #000;
}

.demo-caption {
  color: var(--text-dim);
  margin-top: 18px;
  font-size: 0.92rem;
}

/* ---------- steps ---------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.step {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 26px 20px;
  position: relative;
}
.step-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--neon-pink);
  margin-bottom: 12px;
}
.step h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--text);
}
.step p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.88rem;
}

/* ---------- code blocks ---------- */
.code-block {
  position: relative;
  background: #0b0b16;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 20px;
  overflow-x: auto;
  margin: 16px 0;
}
.code-block pre {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.7;
}
.code-block code {
  background: none;
  padding: 0;
  color: var(--text);
  white-space: pre;
}
.code-block .cmt { color: var(--text-dimmer); }
.code-block .ok { color: var(--neon-green); }

/* ---------- install section extras ---------- */
.install-panel { display: none; }
.install-panel.is-active { display: block; animation: fadeIn 0.3s ease; }

.requirements, .quickstart, .usage-table-wrap, .example-output, .config-note {
  margin-top: 56px;
}
.requirements h3, .quickstart h3, .usage-table-wrap h3, .example-output h3, .config-note h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--neon-cyan);
  margin-bottom: 16px;
}

.check-list, .numbered-list {
  margin: 0;
  padding-left: 22px;
  color: var(--text-dim);
}
.check-list { list-style: none; padding-left: 0; }
.check-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: 0.92rem;
}
.check-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--neon-pink);
}
.numbered-list li {
  margin-bottom: 10px;
  font-size: 0.92rem;
}

.usage-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.usage-table th, .usage-table td {
  text-align: left;
  padding: 14px 18px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--panel-border);
}
.usage-table th {
  color: var(--neon-purple);
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.usage-table tr:last-child td { border-bottom: none; }
.usage-table td { color: var(--text-dim); }

/* ---------- developers ---------- */
.dev-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 26px;
}
.dev-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text);
  margin: 0 0 16px;
}
.dev-card p { color: var(--text-dim); font-size: 0.9rem; }

.dev-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 12px;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--panel-border);
  padding: 48px 0 32px;
  background: #030308;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}
.footer-brand p {
  color: var(--text-dimmer);
  font-size: 0.85rem;
  max-width: 320px;
  margin: 10px 0 0;
}
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--text-dim);
  font-size: 0.88rem;
}
.footer-links a:hover { color: var(--neon-cyan); }

.footer-copy {
  width: 100%;
  text-align: center;
  color: var(--text-dimmer);
  font-size: 0.78rem;
  margin-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.04);
  padding-top: 20px;
}

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; padding-top: 120px; }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(5,5,10,0.97);
    border-bottom: 1px solid var(--panel-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav-links.is-open { max-height: 400px; }
  .nav-links li { width: 100%; }
  .nav-link { display: block; width: 100%; padding: 14px 24px; }
  .nav-link--github { margin: 8px 24px; display: inline-block; }

  .grid--3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .install-bar { flex-wrap: wrap; }
  .install-bar code { white-space: normal; }
  .demo-tabs { flex-direction: column; align-items: stretch; }
}