:root {
  --bg: #0d0f17;
  --bg-2: #141827;
  --panel: #171b28;
  --border: #262a3a;
  --text: #eef0f6;
  --subtext: #9aa0b8;
  --muted: #5b6178;
  --accent: #00aaff;
  --accent-2: #7c5cff;
  --gradient: linear-gradient(90deg, var(--accent), var(--accent-2));
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Inter", Arial, sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(13, 15, 23, 0.75);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}
.brand img { width: 26px; height: 26px; }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a { display: inline-flex; align-items: center; gap: 6px; color: var(--subtext); font-size: 14px; font-weight: 500; white-space: nowrap; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

@media (max-width: 860px) {
  .nav-links { display: none; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 38px; }
  .hero p { font-size: 16px; }
  .demo-panel { padding: 20px; }
  .installer-demo { flex-direction: column; }
  .installer-sidebar { width: auto; }
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--gradient);
  border: none;
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 170, 255, 0.25);
}
.btn-primary:hover { box-shadow: 0 10px 30px rgba(0, 170, 255, 0.4); }
.btn-ghost { background: transparent; color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 110px 0 90px;
  text-align: center;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(closest-side, rgba(0, 170, 255, 0.25), transparent);
  pointer-events: none;
  animation: drift 10s ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: translateX(-54%) translateY(0); }
  to   { transform: translateX(-46%) translateY(30px); }
}
.eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 22px;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}
.hero h1 {
  font-size: 56px;
  margin: 0 0 18px;
  font-weight: 800;
  letter-spacing: -1px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.1s forwards;
}
.hero h1 span {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  max-width: 620px;
  margin: 0 auto 34px;
  color: var(--subtext);
  font-size: 18px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.2s forwards;
}
.hero-ctas {
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-bottom: 70px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.3s forwards;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* mock window preview */
.mock-window {
  max-width: 620px;
  margin: 0 auto;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.4s forwards, float 5s ease-in-out 1.2s infinite;
  text-align: left;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.mock-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #1c2030;
}
.mock-dot { width: 10px; height: 10px; border-radius: 50%; }
.mock-dot.r { background: #ff5f57; }
.mock-dot.y { background: #febc2e; }
.mock-dot.g { background: #28c840; }
.mock-body { padding: 22px; }
.mock-bar { height: 14px; border-radius: 4px; background: var(--gradient); opacity: 0.9; margin-bottom: 14px; width: 88%; }
.mock-line { height: 10px; border-radius: 4px; background: #3a3f52; margin-bottom: 10px; }
.mock-line.w1 { width: 62%; }
.mock-line.w2 { width: 76%; }
.mock-buttons { display: flex; gap: 10px; margin-top: 18px; }
.mock-btn { height: 30px; border-radius: 7px; }
.mock-btn.primary { width: 120px; background: var(--gradient); }
.mock-btn.secondary { width: 96px; background: #20242f; border: 1px solid #2c3143; }

/* ---------- Sections ---------- */
section { padding: 90px 0; }
.section-head { text-align: center; margin-bottom: 50px; }
.section-head .eyebrow { margin-bottom: 14px; }
.section-head h2 { font-size: 34px; margin: 0 0 12px; font-weight: 800; }
.section-head p { color: var(--subtext); max-width: 560px; margin: 0 auto; }

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Features ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.feature-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(0, 170, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.feature-icon img { width: 20px; height: 20px; }
.feature-card h3 { margin: 0 0 8px; font-size: 16px; }
.feature-card p { margin: 0; color: var(--subtext); font-size: 14px; }

/* ---------- Theme demo ---------- */
.demo-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 30px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
  align-items: center;
}
@media (max-width: 700px) { .demo-panel { grid-template-columns: 1fr; } }
.theme-switch {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.theme-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--subtext);
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
  text-align: left;
}
.theme-option.active {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(0, 170, 255, 0.08);
}
.theme-swatch-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }

.theme-preview {
  border-radius: 12px;
  padding: 24px;
  transition: background 0.4s ease, color 0.4s ease;
  border: 1px solid var(--border);
}
.theme-preview .mock-bar { margin-bottom: 12px; }
.theme-preview .mock-line { margin-bottom: 8px; }

/* ---------- Installer demo ---------- */
.installer-demo {
  display: flex;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  min-height: 320px;
}
.installer-sidebar {
  width: 190px;
  background: linear-gradient(180deg, #141827, #0a0c14);
  padding: 24px 18px;
  flex-shrink: 0;
}
.installer-sidebar .brand-mini { font-weight: 700; margin-bottom: 16px; font-size: 14px; }
.installer-step {
  font-size: 13px;
  color: var(--muted);
  padding: 8px 0;
  transition: color 0.3s ease;
}
.installer-step.active { color: var(--text); font-weight: 700; }
.installer-step.done { color: var(--accent); }
.installer-content {
  flex: 1;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.installer-badge { color: var(--accent); font-size: 11px; font-weight: 700; letter-spacing: 1px; margin-bottom: 10px; }
.installer-title { font-size: 22px; font-weight: 700; margin: 0 0 12px; }
.installer-progress-wrap { margin-top: 18px; }
.installer-progress-bar { height: 10px; border-radius: 6px; background: #20242f; overflow: hidden; }
.installer-progress-fill { height: 100%; width: 0%; background: var(--gradient); transition: width 0.4s ease; }
.installer-percent { font-size: 34px; font-weight: 700; margin: 14px 0 4px; }
.installer-status { color: var(--subtext); font-size: 13px; }

/* ---------- Fireworks demo ---------- */
.fireworks-demo {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #08090f;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fireworks-demo canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.fireworks-caption {
  position: relative;
  z-index: 2;
  text-align: center;
  pointer-events: none;
}
.fireworks-caption h3 { font-size: 22px; margin: 0 0 6px; }
.fireworks-caption p { color: var(--subtext); font-size: 14px; margin: 0 0 18px; }
.fireworks-caption .btn { pointer-events: all; }

/* ---------- Download / version history ---------- */
.version-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.version-table th, .version-table td {
  padding: 16px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  vertical-align: top;
}
.version-table th { color: var(--subtext); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.version-table tr:last-child td { border-bottom: none; }
.tag-pill {
  display: inline-block;
  background: rgba(0, 170, 255, 0.12);
  color: var(--accent);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 7px;
  background: var(--gradient);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.dl-btn:hover { text-decoration: none; box-shadow: 0 6px 18px rgba(0, 170, 255, 0.3); transform: translateY(-1px); }
.dl-btn img { width: 13px; height: 13px; filter: brightness(0) invert(1); }
.dl-row { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.dl-label { font-size: 11px; color: var(--muted); }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}
footer a { color: var(--subtext); }

.center { text-align: center; }
.mt-40 { margin-top: 40px; }