:root {
  --bg: #0b0f14;
  --bg-elev: #121821;
  --bg-card: #151c27;
  --border: #243041;
  --text: #e8eef7;
  --muted: #8b9bb0;
  --accent: #5b9dff;
  --accent-2: #7c6cff;
  --ok: #3dd68c;
  --warn: #f5a524;
  --danger: #f2555a;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(91,157,255,.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(124,108,255,.14), transparent 50%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

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

.wrap {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.brand {
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
  text-decoration: none;
}
.brand span { color: var(--muted); font-weight: 500; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .78rem;
  color: var(--muted);
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  padding: .35rem .7rem;
  border-radius: 999px;
}
.badge::before {
  content: "";
  width: .45rem; height: .45rem;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(61,214,140,.15);
}

.hero h1 {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.25;
  margin: 0 0 .75rem;
}
.hero p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36em;
}

.section-title {
  margin: 2.75rem 0 1rem;
  font-size: .85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,.03), transparent 40%), var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1.15rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: .75rem;
  min-height: 190px;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: #35506e; transform: translateY(-2px); }
.card.disabled { opacity: .55; }
.card.disabled:hover { transform: none; border-color: var(--border); }

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: .75rem;
}
.card h2 {
  margin: 0;
  font-size: 1.1rem;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
  flex: 1;
}
.status {
  font-size: .72rem;
  padding: .2rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  white-space: nowrap;
}
.status.live { color: var(--ok); border-color: rgba(61,214,140,.35); background: rgba(61,214,140,.08); }
.status.build { color: var(--warn); border-color: rgba(245,165,36,.35); background: rgba(245,165,36,.08); }
.status.soon { color: var(--muted); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  border: 1px solid var(--border);
  background: #1a2433;
  color: var(--text);
  border-radius: 10px;
  padding: .55rem .9rem;
  font-size: .92rem;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
}
.btn:hover { background: #223147; text-decoration: none; }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}
.btn.primary:hover { filter: brightness(1.08); }
.btn:disabled, .btn.disabled {
  opacity: .45;
  cursor: not-allowed;
  pointer-events: none;
}
.btn.ghost {
  background: transparent;
}

.footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .88rem;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  justify-content: space-between;
}

/* demo pages */
.demo-head {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.demo-head h1 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
}
.demo-note {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .8rem;
  color: var(--warn);
  border: 1px solid rgba(245,165,36,.35);
  background: rgba(245,165,36,.08);
  padding: .35rem .7rem;
  border-radius: 999px;
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem;
  box-shadow: var(--shadow);
}

label {
  display: block;
  font-size: .85rem;
  color: var(--muted);
  margin-bottom: .4rem;
}
textarea, select, input[type="text"] {
  width: 100%;
  background: #0d131c;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .75rem .85rem;
  font: inherit;
  resize: vertical;
}
textarea:focus, select:focus, input:focus {
  outline: 2px solid rgba(91,157,255,.35);
  border-color: #3d6ea8;
}
.row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .75rem;
  align-items: end;
}
@media (max-width: 640px) {
  .row { grid-template-columns: 1fr; }
}

.modes {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: .75rem 0 1rem;
}
.mode {
  border: 1px solid var(--border);
  background: #101722;
  color: var(--muted);
  border-radius: 999px;
  padding: .4rem .8rem;
  cursor: pointer;
  font: inherit;
  font-size: .88rem;
}
.mode.active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.result {
  margin-top: 1rem;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: .88rem;
  line-height: 1.55;
  background: #0a1018;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  min-height: 8rem;
  color: #c9d7ea;
}
.result.empty { color: var(--muted); }

.steps {
  display: grid;
  gap: .65rem;
  margin: 1rem 0;
}
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .85rem;
  align-items: start;
  padding: .85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #101722;
  opacity: .45;
  transition: opacity .2s ease, border-color .2s ease;
}
.step.active, .step.done {
  opacity: 1;
}
.step.active { border-color: #3d6ea8; }
.step.done { border-color: rgba(61,214,140,.35); }
.step-num {
  width: 1.7rem; height: 1.7rem;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: .8rem;
  font-weight: 700;
  background: #1a2433;
  border: 1px solid var(--border);
}
.step.done .step-num { background: rgba(61,214,140,.15); color: var(--ok); border-color: transparent; }
.step.active .step-num { background: rgba(91,157,255,.18); color: var(--accent); border-color: transparent; }
.step h3 { margin: 0 0 .2rem; font-size: .98rem; }
.step p { margin: 0; color: var(--muted); font-size: .9rem; }

.actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1rem; }
.fake-input {
  margin-bottom: 1rem;
  padding: .9rem 1rem;
  border-radius: 12px;
  border: 1px dashed #35506e;
  background: rgba(91,157,255,.05);
  color: #c9d7ea;
  font-size: .92rem;
}
.fake-input strong { color: var(--text); }