:root {
  --bg: #0B1220;
  --bg-soft: #0F1A2E;
  --card: #111C33;
  --card-border: #1E2C47;
  --text: #E5EEF9;
  --text-dim: #9FB0C7;
  --text-mute: #6B7C95;
  --cyan: #22D3EE;
  --green: #34D399;
  --accent: var(--cyan);
  --accent-soft: rgba(34, 211, 238, 0.12);
  --green-soft: rgba(52, 211, 153, 0.12);
  --danger: #F87171;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 80% -10%, rgba(34,211,238,0.08), transparent 60%),
              radial-gradient(900px 500px at -10% 10%, rgba(52,211,153,0.06), transparent 60%),
              var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(11, 18, 32, 0.8);
  border-bottom: 1px solid var(--card-border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text); }
.brand img { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 18px; align-items: center; font-size: 14px; }
.nav-links a { color: var(--text-dim); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--card-border); color: var(--text);
  border-radius: 8px; padding: 6px 10px; cursor: pointer; }

/* ---------- Hero ---------- */
.hero { padding: 70px 0 40px; text-align: center; }
.hero h1 {
  font-size: clamp(30px, 5.5vw, 48px);
  margin: 10px 0 14px;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.tagline { font-size: clamp(15px, 2.2vw, 18px); color: var(--text-dim); max-width: 720px; margin: 0 auto 28px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 26px; }
.badge {
  font-size: 12.5px; color: var(--text-dim);
  border: 1px solid var(--card-border); background: var(--bg-soft);
  padding: 4px 10px; border-radius: 999px;
}
.badge b { color: var(--cyan); font-weight: 600; }

.btn {
  display: inline-block; padding: 12px 22px; border-radius: 10px;
  font-weight: 600; font-size: 15px; cursor: pointer; border: none;
  transition: transform .08s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary { background: linear-gradient(90deg, var(--cyan), var(--green)); color: #04121a; }
.btn-primary:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(34,211,238,0.25); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--card-border); margin-left: 10px; }
.btn-ghost:hover { background: var(--bg-soft); text-decoration: none; }
.btn-green { background: var(--green-soft); color: var(--green); border: 1px solid rgba(52,211,153,0.35); }
.btn-green:hover { text-decoration: none; background: rgba(52,211,153,0.2); }

.hero-cta { margin-top: 8px; }
.hero-note { font-size: 12.5px; color: var(--text-mute); margin-top: 14px; }

/* ---------- Sections ---------- */
section { padding: 44px 0; }
.section-title { font-size: 26px; margin: 0 0 6px; }
.section-sub { color: var(--text-dim); margin: 0 0 26px; font-size: 15px; }

.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; font-size: 16.5px; display: flex; align-items: center; gap: 8px; }
.card h3 .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); }
.card.green h3 .dot { background: var(--green); }
.card p { margin: 0; color: var(--text-dim); font-size: 14px; }

/* ---------- Download ---------- */
.download-card {
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 26px; display: flex; flex-wrap: wrap; gap: 20px; align-items: center; justify-content: space-between;
}
.download-meta { font-size: 13.5px; color: var(--text-dim); }
.download-meta .ver { color: var(--cyan); font-weight: 700; font-size: 18px; }
.download-meta .size { color: var(--text-mute); margin-left: 8px; }

/* ---------- Steps ---------- */
.steps { counter-reset: step; }
.step { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--card-border); }
.step:last-child { border-bottom: none; }
.step-num {
  flex: 0 0 32px; height: 32px; border-radius: 50%;
  background: var(--accent-soft); color: var(--cyan);
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.step-body h4 { margin: 4px 0 4px; font-size: 15px; }
.step-body p { margin: 0; color: var(--text-dim); font-size: 13.5px; }

/* ---------- Screenshots placeholder ---------- */
.shot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.shot {
  aspect-ratio: 9/16; border-radius: 12px; border: 1px dashed var(--card-border);
  background: linear-gradient(180deg, rgba(34,211,238,0.05), rgba(52,211,153,0.03));
  display: flex; align-items: center; justify-content: center; color: var(--text-mute); font-size: 13px;
}

/* ---------- Changelog ---------- */
.changelog-item { padding: 14px 0; border-bottom: 1px dashed var(--card-border); }
.changelog-item:last-child { border-bottom: none; }
.changelog-item h4 { margin: 0 0 4px; font-size: 15px; }
.changelog-item h4 .tag { font-size: 12px; color: var(--green); margin-left: 8px; font-weight: 500; }
.changelog-item p { margin: 0; color: var(--text-dim); font-size: 13.5px; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--card-border); margin-top: 30px; padding: 26px 0 40px;
  color: var(--text-mute); font-size: 13px;
}
footer .cols { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; }
footer a { color: var(--text-dim); }

/* ---------- Announcement bar ---------- */
.announce-bar {
  background: linear-gradient(90deg, rgba(34,211,238,0.14), rgba(52,211,153,0.14));
  border-bottom: 1px solid var(--card-border);
  padding: 8px 0; font-size: 13px; color: var(--text);
}
.announce-bar b { color: var(--cyan); margin-right: 10px; }
.announce-bar span { color: var(--text-dim); }

/* ---------- Admin / dan ---------- */
.lock-overlay {
  position: fixed; inset: 0; background: rgba(5, 10, 20, 0.96);
  display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.lock-box {
  width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 28px; text-align: center;
}
.lock-box h2 { margin: 0 0 6px; font-size: 20px; }
.lock-box p { color: var(--text-dim); font-size: 13.5px; margin: 0 0 16px; }
.lock-box input {
  width: 100%; padding: 11px 12px; border-radius: 8px; border: 1px solid var(--card-border);
  background: var(--bg-soft); color: var(--text); font-size: 15px; outline: none;
}
.lock-box input:focus { border-color: var(--cyan); }
.lock-box .err { color: var(--danger); font-size: 12.5px; margin-top: 8px; min-height: 18px; }
.lock-note { font-size: 11.5px; color: var(--text-mute); margin-top: 14px; line-height: 1.5; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 18px 0; }
.stat {
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 16px;
}
.stat .label { font-size: 12.5px; color: var(--text-dim); }
.stat .value { font-size: 26px; font-weight: 700; margin-top: 4px; color: var(--cyan); }
.stat.green .value { color: var(--green); }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--card-border); }
th { color: var(--text-dim); font-weight: 600; font-size: 12.5px; }
td.num { text-align: right; font-variant-numeric: tabular-nums; color: var(--text); }

.state-box {
  padding: 30px; text-align: center; color: var(--text-dim);
  border: 1px dashed var(--card-border); border-radius: var(--radius);
}
.state-box.error { color: var(--danger); border-color: rgba(248,113,113,0.4); }

/* ---------- Admin form ---------- */
.field { margin-top: 14px; }
.field label { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%; padding: 11px 12px; border-radius: 8px; border: 1px solid var(--card-border);
  background: var(--bg-soft); color: var(--text); font-size: 14.5px; outline: none;
  font-family: inherit;
}
.field input:focus, .field textarea:focus { border-color: var(--cyan); }
.state-mini { color: var(--green); font-size: 13px; align-self: center; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .shot-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--bg-soft); border-bottom: 1px solid var(--card-border); padding: 14px 20px;
  }
  .nav-toggle { display: inline-block; }
  .grid-3 { grid-template-columns: 1fr; }
  .shot-grid { grid-template-columns: repeat(2, 1fr); }
  .btn-ghost { margin-left: 0; margin-top: 10px; }
  .hero { padding: 50px 0 30px; }
}