:root {
  color-scheme: dark;
  --bg: #0a1210;
  --panel: #121c1a;
  --line: #2a3c37;
  --text: #eef8f4;
  --muted: #9db0aa;
  --accent: #4de0a7;
  --accent-soft: rgba(77, 224, 167, .14);
  --warn: #f3bd52;
  --danger: #ff746c;
  --ok: #4de0a7;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 8% -8%, #1a3d32 0, transparent 34%),
    radial-gradient(circle at 92% 0%, #243028 0, transparent 28%),
    var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select { font: inherit; }
button {
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: .62rem 1rem;
  color: #052117;
  background: var(--accent);
  cursor: pointer;
  font-weight: 700;
}
button:hover:not(:disabled) { filter: brightness(1.07); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.secondary {
  color: var(--text);
  background: transparent;
  border-color: var(--line);
}
button.danger {
  color: #3a0c0a;
  background: var(--danger);
  border-color: var(--danger);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: flex-start;
  padding: 1.6rem clamp(1rem, 4vw, 3.5rem);
  border-bottom: 1px solid var(--line);
  background: rgba(10, 18, 16, .88);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 2;
}
.topbar h1 { margin: 0 0 .35rem; font-size: clamp(1.45rem, 3.5vw, 2.1rem); }
.eyebrow {
  margin: 0 0 .35rem;
  color: var(--accent);
  font-size: .72rem;
  letter-spacing: .16em;
  font-weight: 800;
}
.lead, .hint { color: var(--muted); margin: 0; line-height: 1.5; }
.hint { font-size: .9rem; }
.hint.tight { margin-top: .65rem; }
.hint code, .prompt code, .lead code {
  font-family: ui-monospace, Consolas, monospace;
  font-size: .86em;
  color: #c9ebe0;
}
.topbar-meta { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
.link { color: var(--muted); }
.link:hover { color: var(--accent); }

main {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 1.1rem clamp(1rem, 4vw, 3.5rem) 3.5rem;
  display: grid;
  gap: .85rem;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .85rem;
}
.panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem 1.15rem;
  background: linear-gradient(145deg, rgba(23, 37, 34, .96), rgba(13, 23, 21, .96));
}
.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: .85rem;
}
.panel-heading h2 { margin: 0; font-size: 1.12rem; }

.form-row {
  display: grid;
  grid-template-columns: 1.2fr 1.2fr .6fr;
  gap: .75rem;
  margin-bottom: .75rem;
}
label {
  display: grid;
  gap: .35rem;
  font-size: .86rem;
  color: var(--muted);
}
input, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .58rem .7rem;
  color: var(--text);
  background: #0d1715;
}
input:focus, select:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}
label.readonly input { opacity: .75; }

.btn-row, .cal-start {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: .85rem;
}
.cal-start { margin-top: 0; }

.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid;
  border-radius: 999px;
  padding: .35rem .7rem;
  font-size: .82rem;
  font-weight: 700;
  white-space: nowrap;
}
.badge.ok { color: var(--ok); border-color: var(--ok); background: var(--accent-soft); }
.badge.warn { color: var(--warn); border-color: var(--warn); }
.badge.error { color: var(--danger); border-color: var(--danger); }

.wizard {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.wizard-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
  margin-bottom: .75rem;
}
.steps {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: var(--muted);
  display: grid;
  gap: .35rem;
}
.steps li.active { color: var(--accent); font-weight: 700; }
.steps li.done { color: #7f9b92; text-decoration: line-through; }
.prompt {
  margin: 0 0 .85rem;
  padding: .85rem 1rem;
  border-radius: 10px;
  border: 1px solid rgba(77, 224, 167, .28);
  background: rgba(77, 224, 167, .08);
  color: var(--text);
  line-height: 1.55;
  font-size: 1rem;
}

.result-box {
  margin: 0 0 .85rem;
  padding: .85rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0b1412;
  color: #c9ebe0;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 4.5rem;
  font-family: ui-monospace, Consolas, monospace;
  font-size: .84rem;
}
.event-log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 280px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0b1412;
}
.event-log li {
  padding: .55rem .8rem;
  border-bottom: 1px solid rgba(43, 61, 56, .65);
  font-family: ui-monospace, Consolas, monospace;
  font-size: .78rem;
  color: #b7cfc6;
  word-break: break-word;
}
.event-log li:last-child { border-bottom: 0; }
.event-log .empty { color: var(--muted); font-family: inherit; }
.event-log .fail { color: #ffb0ab; }
.event-log .ok { color: #9be7c8; }

#toast {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  transform: translateX(-50%) translateY(120%);
  background: #17352c;
  border: 1px solid var(--accent);
  color: var(--text);
  padding: .7rem 1rem;
  border-radius: 999px;
  opacity: 0;
  transition: .22s ease;
  z-index: 20;
  max-width: min(90vw, 520px);
  text-align: center;
}
#toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.error { border-color: var(--danger); background: #3a1715; }

@media (max-width: 860px) {
  .grid-2, .form-row { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; }
}