/* ============================================================
   AI Citadel — Landing page
   ============================================================ */
:root {
  --bg: #070b12;
  --bg-soft: #0c1220;
  --bg-card: #0e1524;
  --border: #1c2637;
  --border-hover: #2b3a52;
  --text: #e8eef6;
  --text-dim: #93a1b5;
  --text-faint: #5f6d82;
  --accent: #34d399;
  --accent-2: #6ee7b7;
  --accent-dim: rgba(52, 211, 153, 0.12);
  --amber: #fbbf24;
  --red: #f87171;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
::selection { background: rgba(52, 211, 153, 0.3); }

/* ---------- keyboard focus visibility ---------- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
.btn:focus-visible { outline-offset: 4px; }

/* ---------- scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 200; box-shadow: 0 0 12px rgba(52,211,153,0.6);
}

/* ---------- reveal animations ---------- */
.reveal { opacity: 1; transform: none; }
html.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  will-change: opacity, transform;
}
html.js .reveal.in { opacity: 1; transform: none; }
html.js .reveal.d1 { transition-delay: 0.12s; }
html.js .reveal.d2 { transition-delay: 0.24s; }
html.js .reveal.d3 { transition-delay: 0.36s; }
html.js .reveal.d4 { transition-delay: 0.48s; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Nav ---------- */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(7, 11, 18, 0.6);
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s;
}
nav.scrolled { background: rgba(7, 11, 18, 0.85); border-bottom-color: var(--border); }
.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; letter-spacing: 0.2px; }
.logo .ai { color: var(--accent); }
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links > a:not(.btn) {
  color: var(--text-dim); font-size: 14.5px; position: relative;
  transition: color 0.15s;
}
.nav-links > a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: -4px; height: 1.5px; width: 0;
  background: var(--accent); transition: width 0.25s var(--ease-out);
}
.nav-links > a:not(.btn):hover { color: var(--text); }
.nav-links > a:not(.btn):hover::after { width: 100%; }
.nav-burger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; transition: 0.25s; }
.mobile-menu {
  display: none; position: fixed; inset: 64px 0 auto 0; z-index: 99;
  background: rgba(7, 11, 18, 0.97); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 20px 24px 28px; flex-direction: column; gap: 18px;
}
.mobile-menu a { color: var(--text-dim); font-size: 16px; }
.mobile-menu a.btn { color: #04150d; justify-content: center; }
.mobile-menu.open { display: flex; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 8px;
  font-size: 14.5px; font-weight: 600;
  transition: all 0.2s var(--ease-out); cursor: pointer; border: none;
}
.btn-lg { padding: 14px 28px; font-size: 15.5px; }
.btn-primary {
  background: linear-gradient(120deg, var(--accent), #2dd4a7);
  color: #04150d;
  box-shadow: 0 0 24px rgba(52, 211, 153, 0.25), inset 0 1px 0 rgba(255,255,255,0.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 36px rgba(52, 211, 153, 0.45); }
.btn-ghost {
  background: rgba(14, 21, 36, 0.5); color: var(--text);
  border: 1px solid var(--border-hover);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn-sm { padding: 8px 16px; font-size: 13.5px; }
.btn .arrow { transition: transform 0.2s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 150px 0 110px;
  text-align: center;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; }
.hero-img {
  width: 100%; height: 100%; object-fit: cover; object-position: center 30%;
  transform: scale(1.08);
  transition: transform 0.1s linear;
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(7,11,18,0.82) 0%, rgba(7,11,18,0.55) 40%, rgba(7,11,18,0.75) 75%, var(--bg) 100%),
    radial-gradient(ellipse 60% 50% at 50% 45%, transparent 30%, rgba(7,11,18,0.55) 100%);
}
#particles { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-inner { position: relative; z-index: 2; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid rgba(52, 211, 153, 0.3);
  background: rgba(14, 21, 36, 0.6);
  backdrop-filter: blur(8px);
  font-size: 13px; color: var(--text-dim);
  margin-bottom: 30px;
}
.badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--accent); }
  50% { opacity: 0.55; box-shadow: 0 0 3px var(--accent); }
}
h1 {
  font-size: clamp(38px, 6.4vw, 68px);
  font-weight: 800; letter-spacing: -1.8px; line-height: 1.07;
  margin-bottom: 26px;
  text-shadow: 0 4px 40px rgba(0,0,0,0.6);
}
h1 .grad {
  background: linear-gradient(100deg, #34d399 0%, #6ee7b7 45%, #93c5fd 100%);
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: gradShift 6s ease-in-out infinite alternate;
}
@keyframes gradShift { from { background-position: 0% center; } to { background-position: 100% center; } }
.hero p.lead {
  max-width: 660px; margin: 0 auto 42px;
  font-size: 18.5px; color: #b6c2d4;
  text-shadow: 0 2px 20px rgba(0,0,0,0.7);
}
.hero p.lead strong { color: var(--text); font-weight: 600; }
.hero-ctas { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 68px; }
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: rgba(28, 38, 55, 0.7);
  border: 1px solid rgba(28, 38, 55, 0.9); border-radius: 14px;
  overflow: hidden; max-width: 940px; margin: 0 auto;
  backdrop-filter: blur(12px);
}
.stat { background: rgba(12, 18, 32, 0.72); padding: 26px 18px; }
.stat .num { font-family: var(--mono); font-size: 26px; font-weight: 700; color: var(--accent); }
.stat .lbl { font-size: 13px; color: var(--text-faint); margin-top: 4px; }
.hero-scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  width: 24px; height: 38px; border: 1.5px solid rgba(147,161,181,0.5); border-radius: 12px;
  z-index: 2;
}
.hero-scroll-hint span {
  position: absolute; top: 7px; left: 50%; margin-left: -1.5px;
  width: 3px; height: 8px; border-radius: 2px; background: var(--accent);
  animation: scrollHint 1.8s infinite;
}
@keyframes scrollHint {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- Sections ---------- */
section { padding: 110px 0; position: relative; }
.section-head { text-align: center; max-width: 700px; margin: 0 auto 64px; }
.eyebrow {
  font-family: var(--mono); font-size: 12.5px; font-weight: 600;
  letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; letter-spacing: -1px; line-height: 1.15; margin-bottom: 16px; }
.section-head p { color: var(--text-dim); font-size: 17px; }

/* ---------- Features ---------- */
.features { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 30px 28px;
  position: relative; overflow: hidden;
  transition: border-color 0.25s, transform 0.25s var(--ease-out), box-shadow 0.25s;
  transform-style: preserve-3d;
}
.card:hover {
  border-color: rgba(52, 211, 153, 0.35);
  box-shadow: 0 18px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(52,211,153,0.1);
}
.card-glow {
  position: absolute; width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, rgba(52,211,153,0.13), transparent 70%);
  top: var(--gy, -110px); left: var(--gx, 50%);
  transform: translate(-50%, -50%);
  pointer-events: none; opacity: 0; transition: opacity 0.3s;
}
.card:hover .card-glow { opacity: 1; }
.card .icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--accent-dim); border: 1px solid rgba(52,211,153,0.15);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  transition: transform 0.25s var(--ease-out);
}
.card:hover .icon { transform: scale(1.08) rotate(-4deg); }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; letter-spacing: -0.3px; }
.card p { font-size: 14.5px; color: var(--text-dim); }
.card .metric {
  display: inline-block; margin-top: 16px;
  font-family: var(--mono); font-size: 12px; color: var(--accent);
  background: var(--accent-dim); border-radius: 6px; padding: 4px 10px;
}

/* ---------- How it works ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px;
  padding: 32px 28px; position: relative; overflow: hidden;
  transition: border-color 0.25s, transform 0.25s var(--ease-out);
}
.step:hover { border-color: rgba(52, 211, 153, 0.3); transform: translateY(-4px); }
.step-line {
  position: absolute; top: 0; left: 0; height: 2px; width: 100%;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
  opacity: 0.7;
}
.step .n {
  font-family: var(--mono); font-size: 13px; color: var(--accent);
  border: 1px solid var(--accent-dim); background: var(--accent-dim);
  width: 38px; height: 38px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center; font-weight: 700;
  margin-bottom: 20px;
}
.step h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 10px; }
.step p { font-size: 14.5px; color: var(--text-dim); }
.step .lat { margin-top: 16px; font-family: var(--mono); font-size: 12.5px; color: var(--text-faint); }
.step .lat b { color: var(--amber); font-weight: 600; }

/* terminal */
.terminal {
  max-width: 780px; margin: 60px auto 0;
  background: #0a0f1a; border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; text-align: left;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
}
.terminal-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--bg-card);
}
.terminal-bar > span { width: 11px; height: 11px; border-radius: 50%; }
.terminal-bar > span:nth-child(1) { background: #f87171; }
.terminal-bar > span:nth-child(2) { background: #fbbf24; }
.terminal-bar > span:nth-child(3) { background: #34d399; }
.terminal-bar .title { margin-left: 10px; font-family: var(--mono); font-size: 12px; color: var(--text-faint); }
.terminal pre {
  padding: 22px 24px; font-family: var(--mono); font-size: 13.5px; line-height: 1.9;
  color: #c7d3e3; overflow-x: auto; min-height: 340px; white-space: pre-wrap; word-break: break-all;
}
.terminal .c { color: #55677e; }
.terminal .g { color: var(--accent); }
.terminal .y { color: var(--amber); }
.terminal .cursor {
  display: inline-block; width: 8px; height: 15px;
  background: var(--accent); vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Deep dive splits ---------- */
.deepdive { background: var(--bg-soft); border-top: 1px solid var(--border); }
.deepdive.alt { background: var(--bg); border-top: none; }
.split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.split-text h2 { font-size: clamp(26px, 3.4vw, 36px); }
.split-text p { color: var(--text-dim); font-size: 16px; margin-bottom: 24px; }
.split-text code {
  font-family: var(--mono); font-size: 13.5px;
  background: var(--accent-dim); color: var(--accent);
  padding: 2px 7px; border-radius: 5px;
}
.check-list { list-style: none; }
.check-list li {
  position: relative; padding: 8px 0 8px 30px;
  font-size: 14.5px; color: var(--text-dim);
}
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 13px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent-dim) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%2334d399" stroke-width="3" stroke-linecap="round"><path d="M6 13l4 4 8-9"/></svg>') center/10px no-repeat;
}
.split-media { position: relative; }
.split-media img {
  width: 100%; border-radius: 16px; display: block;
  border: 1px solid var(--border-hover);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  transition: transform 0.5s var(--ease-out);
}
.split-media:hover img { transform: scale(1.02); }
.media-frame {
  position: absolute; inset: -14px; border-radius: 22px;
  border: 1px solid rgba(52, 211, 153, 0.15);
  pointer-events: none;
  z-index: -1;
}

/* ---------- Dashboard showcase ---------- */
.dash { overflow: hidden; }
.dash::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 55% 40% at 50% 45%, rgba(52, 211, 153, 0.06), transparent 70%);
  pointer-events: none;
}
.browser-frame {
  max-width: 1000px; margin: 0 auto;
  border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border-hover);
  box-shadow: 0 40px 100px rgba(0,0,0,0.55), 0 0 80px rgba(52,211,153,0.06);
  transform: perspective(1400px) rotateX(var(--rx, 6deg)) scale(var(--sc, 0.97));
  transition: transform 0.2s linear;
  background: var(--bg-card);
  position: relative; z-index: 2;
}
.browser-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 16px; background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}
.browser-bar > span { width: 11px; height: 11px; border-radius: 50%; }
.browser-bar > span:nth-child(1) { background: #f87171; }
.browser-bar > span:nth-child(2) { background: #fbbf24; }
.browser-bar > span:nth-child(3) { background: #34d399; }
.browser-url {
  margin-left: 12px; flex: 1; max-width: 380px;
  font-family: var(--mono); font-size: 12px; color: var(--text-faint);
  background: rgba(7,11,18,0.7); border: 1px solid var(--border);
  border-radius: 6px; padding: 4px 12px;
}
.browser-frame img { width: 100%; display: block; }
.dash-feats {
  max-width: 1000px; margin: 28px auto 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  position: relative; z-index: 2;
}
.dash-feat {
  background: rgba(14, 21, 36, 0.8); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px 22px;
  transition: border-color 0.2s, transform 0.2s var(--ease-out);
}
.dash-feat:hover { border-color: rgba(52,211,153,0.3); transform: translateY(-3px); }
.dash-feat b { display: block; font-size: 14.5px; margin-bottom: 5px; }
.dash-feat span { font-size: 13px; color: var(--text-dim); }

/* ---------- Comparison ---------- */
.compare-section { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.compare-wrap {
  overflow-x: auto; border: 1px solid var(--border); border-radius: 14px;
  background: var(--bg-card);
  box-shadow: 0 24px 64px rgba(0,0,0,0.35);
}
table.compare { width: 100%; border-collapse: collapse; min-width: 880px; }
table.compare th, table.compare td {
  padding: 16px 20px; text-align: left; font-size: 14px;
  border-bottom: 1px solid var(--border);
}
table.compare thead th {
  font-size: 13px; letter-spacing: 0.4px; color: var(--text-dim);
  background: var(--bg-soft); font-weight: 600;
  border-bottom: 1px solid var(--border-hover);
}
table.compare thead th.us {
  color: var(--accent); font-weight: 700;
  background: rgba(52, 211, 153, 0.08);
  border-bottom: 2px solid var(--accent);
}
table.compare thead th .col-tag {
  display: block; font-size: 10.5px; font-family: var(--mono);
  color: var(--text-faint); font-weight: 500; margin-top: 2px;
}
table.compare tbody tr { transition: background 0.15s; }
table.compare tbody tr:hover { background: rgba(148, 163, 184, 0.03); }
table.compare td:first-child { color: var(--text); font-weight: 500; }
table.compare td.us {
  background: rgba(52, 211, 153, 0.06); color: var(--text); font-weight: 600;
  border-left: 1px solid rgba(52,211,153,0.12);
  border-right: 1px solid rgba(52,211,153,0.12);
}
table.compare tbody tr:last-child td.us { border-bottom: 2px solid var(--accent); }
table.compare td.dim { color: var(--text-dim); }
table.compare tbody tr:last-child td { border-bottom: none; }
.yes { color: var(--accent); font-weight: 700; }
.no { color: var(--red); }
.part { color: var(--amber); }
.compare-note { margin-top: 18px; font-size: 13px; color: var(--text-faint); text-align: center; }

/* ---------- Pricing ---------- */
.oss-split { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: stretch; }
.oss-card {
  border-radius: 16px; padding: 38px 34px; border: 1px solid var(--border);
  background: var(--bg-card);
  display: flex; flex-direction: column;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
}
.oss-card:hover { transform: translateY(-5px); border-color: var(--border-hover); box-shadow: 0 24px 60px rgba(0,0,0,0.4); }
.oss-card.cloud {
  border-color: rgba(52, 211, 153, 0.4);
  background: linear-gradient(160deg, rgba(52,211,153,0.09), var(--bg-card) 55%);
  position: relative;
  box-shadow: 0 0 60px rgba(52, 211, 153, 0.08);
}
.oss-card.cloud:hover { border-color: rgba(52, 211, 153, 0.65); box-shadow: 0 24px 70px rgba(0,0,0,0.45), 0 0 80px rgba(52,211,153,0.12); }
.cloud-badge {
  position: absolute; top: -13px; right: 26px;
  background: linear-gradient(120deg, var(--accent), #2dd4a7);
  color: #04150d; font-size: 12px; font-weight: 700;
  padding: 5px 14px; border-radius: 999px;
  box-shadow: 0 4px 16px rgba(52,211,153,0.4);
}
.oss-card .tag {
  display: inline-block; font-family: var(--mono); font-size: 11.5px; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
  padding: 5px 12px; border-radius: 6px; margin-bottom: 18px;
  align-self: flex-start;
}
.oss-card .tag.free { background: rgba(148,163,184,0.12); color: var(--text-dim); }
.oss-card .tag.pro { background: var(--accent-dim); color: var(--accent); }
.oss-card h3 { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 6px; }
.oss-card .price { font-family: var(--mono); font-size: 15px; color: var(--text-dim); margin-bottom: 22px; }
.oss-card .price b { color: var(--text); font-size: 26px; font-weight: 700; }
.oss-card ul { list-style: none; flex: 1; }
.oss-card li {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 14.5px; color: var(--text-dim); padding: 7px 0;
}
.oss-card li svg { flex-shrink: 0; margin-top: 4px; }
.oss-card li b { color: var(--text); font-weight: 600; }
.oss-card .btn { margin-top: 26px; width: 100%; justify-content: center; }

/* ---------- Final CTA ---------- */
.cta-final {
  text-align: center;
  background:
    radial-gradient(ellipse 55% 70% at 50% 110%, rgba(52, 211, 153, 0.13), transparent 70%),
    var(--bg-soft);
  border-top: 1px solid var(--border);
}
.cta-final h2 { margin-bottom: 18px; }
.cta-final p { color: var(--text-dim); max-width: 560px; margin: 0 auto 36px; font-size: 17px; }
.install-cmd {
  max-width: 720px; margin: 0 auto 38px;
  display: flex; align-items: center; gap: 0;
  background: #0a0f1a; border: 1px solid var(--border-hover);
  border-radius: 10px; overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.install-cmd code {
  flex: 1; padding: 15px 20px;
  font-family: var(--mono); font-size: 12.8px; color: var(--accent-2);
  white-space: nowrap; overflow-x: auto; text-align: left;
  scrollbar-width: none;
}
.install-cmd code::-webkit-scrollbar { display: none; }
.copy-btn {
  flex-shrink: 0; align-self: stretch;
  background: var(--accent-dim); color: var(--accent);
  border: none; border-left: 1px solid var(--border);
  font-size: 13px; font-weight: 600; padding: 0 20px;
  cursor: pointer; transition: background 0.2s;
  font-family: inherit;
}
.copy-btn:hover { background: rgba(52,211,153,0.22); }
.copy-btn.copied { color: #04150d; background: var(--accent); }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--border); padding: 40px 0; color: var(--text-faint); font-size: 13.5px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.footer-inner .mono { font-family: var(--mono); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .feature-grid, .steps { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .deepdive.alt .split-media { order: -1; }
  .dash-feats { grid-template-columns: 1fr; }
  .oss-split { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-burger { display: block; }
}
@media (max-width: 640px) {
  .feature-grid, .steps { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  section { padding: 76px 0; }
  .hero { padding: 130px 0 90px; }
  .install-cmd { flex-direction: column; align-items: stretch; }
  .install-cmd code { white-space: normal; word-break: break-all; }
  .copy-btn { padding: 12px; border-left: none; border-top: 1px solid var(--border); }
  .browser-frame { transform: none; }
}