:root {
  --bg: #0c1220;
  --bg-soft: #121a2c;
  --card: #161f33;
  --card-2: #1b2740;
  --line: #28365a;
  --ink: #e8eefc;
  --ink-soft: #aab6d4;
  --muted: #7b88a8;
  --accent: #4f8cff;
  --accent-2: #6ee7b7;
  --warn: #ffb454;
  --danger: #ff6b81;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  font-synthesis: none;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(79, 140, 255, 0.18), transparent 60%),
    radial-gradient(1000px 500px at 110% 0%, rgba(110, 231, 183, 0.12), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(1080px, 92vw); margin: 0 auto; }
.hidden { display: none !important; }
.muted { color: var(--muted); }

/* Topbar */
.topbar {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(12, 18, 32, 0.78);
  border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 30px; line-height: 1; }
.brand h1 { font-size: 19px; margin: 0; letter-spacing: 0.3px; }
.tagline { margin: 0; font-size: 12.5px; color: var(--ink-soft); }
.topnav { display: flex; gap: 8px; flex-wrap: wrap; }

button { font-family: inherit; cursor: pointer; }

.ghost-btn {
  background: transparent; color: var(--ink-soft);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 14px; font-size: 13px; text-decoration: none;
  display: inline-flex; align-items: center; transition: all .15s ease;
}
.ghost-btn:hover { color: var(--ink); border-color: var(--accent); background: rgba(79,140,255,0.08); }

.primary-btn {
  background: linear-gradient(135deg, var(--accent), #6aa1ff);
  color: #fff; border: none; border-radius: 10px;
  padding: 10px 18px; font-size: 14px; font-weight: 600;
  box-shadow: 0 6px 16px rgba(79,140,255,0.35); transition: transform .12s ease, box-shadow .12s ease;
}
.primary-btn:hover { transform: translateY(-1px); box-shadow: 0 9px 22px rgba(79,140,255,0.45); }
.primary-btn:active { transform: translateY(0); }

.card {
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Hero */
.hero { margin: 26px 0; padding: 26px; }
.hero-grid { display: grid; grid-template-columns: 1.55fr 1fr; gap: 26px; }
.field-label { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 8px; font-weight: 600; }
.theme-row { display: flex; gap: 10px; }
#theme-input {
  flex: 1; background: var(--bg); color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 13px 14px; font-size: 15px; outline: none; transition: border-color .15s;
}
#theme-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,140,255,0.18); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.chip {
  background: var(--card-2); border: 1px solid var(--line); color: var(--ink-soft);
  border-radius: 999px; padding: 6px 13px; font-size: 12.5px; transition: all .15s;
}
.chip:hover { color: var(--ink); border-color: var(--accent); background: rgba(79,140,255,0.1); }
.chip .seeded { color: var(--accent-2); font-size: 11px; margin-left: 5px; }

.hero-hint { font-size: 12.5px; color: var(--muted); margin: 16px 0 0; line-height: 1.7; }
.hero-hint strong { color: var(--ink-soft); }

.hero-side { background: var(--card-2); border: 1px solid var(--line); border-radius: 12px; padding: 18px; }
.hero-side h3 { margin: 0 0 12px; font-size: 14px; color: var(--accent-2); }
.why-list { margin: 0; padding-left: 18px; color: var(--ink-soft); font-size: 13px; }
.why-list li { margin-bottom: 9px; }

/* Map controls */
.map-controls {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px; margin: 8px 0 18px; flex-wrap: wrap;
}
.map-title h2 { margin: 0; font-size: 22px; }
.map-meta { font-size: 12.5px; color: var(--muted); }
.map-actions { display: flex; gap: 10px; }

/* Map body */
.map-body { display: flex; flex-direction: column; gap: 18px; padding-bottom: 40px; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.panel-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-bottom: 1px solid var(--line);
  background: var(--card-2);
}
.panel-head .pico { font-size: 18px; }
.panel-head h3 { margin: 0; font-size: 15.5px; }
.panel-head .panel-sub { margin-left: auto; font-size: 12px; color: var(--muted); }
.panel-body { padding: 16px 18px; }

/* Chain layers */
.layers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.layer {
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px; display: flex; flex-direction: column; min-height: 150px;
}
.layer.up { border-top: 3px solid #ff9f6b; }
.layer.mid { border-top: 3px solid var(--accent); }
.layer.down { border-top: 3px solid var(--accent-2); }
.layer.infra { border-top: 3px solid #b794f6; }
.layer-name { font-weight: 700; font-size: 14px; margin-bottom: 3px; }
.layer-role { font-size: 11.5px; color: var(--muted); margin-bottom: 10px; }
.layer-q { font-size: 12px; color: var(--ink-soft); margin: 0 0 10px; padding-left: 16px; }
.layer-q li { margin-bottom: 5px; }
.layer-tags { margin-top: auto; display: flex; flex-wrap: wrap; gap: 6px; }
.tag { background: var(--card-2); border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; font-size: 11px; color: var(--ink-soft); }

/* Editable table */
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th { text-align: left; color: var(--ink-soft); font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--line); font-size: 12px; white-space: nowrap; }
.tbl td { padding: 4px 6px; border-bottom: 1px solid rgba(40,54,90,0.5); vertical-align: top; }
.tbl tr:last-child td { border-bottom: none; }
.cell-input, .cell-area {
  width: 100%; background: transparent; color: var(--ink);
  border: 1px solid transparent; border-radius: 7px; padding: 7px 8px;
  font-family: inherit; font-size: 13px; resize: vertical; transition: all .12s;
}
.cell-input:hover, .cell-area:hover { border-color: var(--line); }
.cell-input:focus, .cell-area:focus { border-color: var(--accent); background: var(--bg); outline: none; }
.cell-area { min-height: 38px; line-height: 1.5; }
.row-del {
  background: transparent; border: none; color: var(--muted);
  font-size: 16px; line-height: 1; padding: 6px; border-radius: 6px;
}
.row-del:hover { color: var(--danger); background: rgba(255,107,129,0.1); }
.add-row {
  margin-top: 10px; background: transparent; border: 1px dashed var(--line);
  color: var(--ink-soft); border-radius: 8px; padding: 8px 14px; font-size: 12.5px; width: 100%;
}
.add-row:hover { border-color: var(--accent); color: var(--ink); }

/* List blocks (catalysts / risks) */
.dual { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.list-block h4 { margin: 0 0 10px; font-size: 13.5px; display: flex; align-items: center; gap: 7px; }
.list-block.cat h4 { color: var(--accent-2); }
.list-block.risk h4 { color: var(--danger); }
.editable-list { list-style: none; margin: 0; padding: 0; }
.editable-list li { display: flex; gap: 8px; align-items: flex-start; margin-bottom: 8px; }
.editable-list .bullet { color: var(--muted); padding-top: 8px; font-size: 12px; }
.editable-list .cell-area { min-height: 34px; }

/* Tracking plan badges */
.freq-pick { display: inline-block; }
.cell-select {
  background: var(--bg); color: var(--ink); border: 1px solid var(--line);
  border-radius: 7px; padding: 7px 8px; font-size: 12.5px; font-family: inherit; width: 100%;
}

.col-narrow { width: 120px; }
.col-mid { width: 160px; }
.col-act { width: 40px; }

/* Toast */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #0f1a30; border: 1px solid var(--accent); color: var(--ink);
  padding: 11px 20px; border-radius: 10px; font-size: 13.5px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.saved-note { text-align: center; color: var(--muted); font-size: 12px; margin: 4px 0 30px; }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 24px 0; margin-top: 20px; }
.footer p { margin: 2px 0; font-size: 12.5px; color: var(--ink-soft); }

/* Responsive */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .layers { grid-template-columns: 1fr 1fr; }
  .dual { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .theme-row { flex-direction: column; }
  .primary-btn { width: 100%; }
  .layers { grid-template-columns: 1fr; }
  .brand h1 { font-size: 17px; }
  .tagline { display: none; }
  .col-mid, .col-narrow { width: auto; }
  .panel-body { padding: 12px; overflow-x: auto; }
}