/* Restrained working UI. Visual polish deliberately deferred (spec §27). */

:root {
  /* dark (default) */
  --bg: #061019;
  --panel: #0c1a26;
  --panel-2: #102331;
  --line: rgba(190, 220, 240, 0.14);
  --ink: #eef6fb;
  --muted: rgba(214, 232, 244, 0.62);
  --faint: rgba(214, 232, 244, 0.38);
  --cyan: #4fd2ff;
  --good: #52e0a8;
  --warn: #ffc46b;
  --bad: #ff8f7a;
  --on-accent: #04202c;

  --navbar-bg: rgba(6, 16, 25, 0.9);
  --track-bg: rgba(190, 220, 240, 0.1);
  --row-bg: rgba(190, 220, 240, 0.04);
  --accent-wash-soft: rgba(79, 210, 255, 0.06);
  --accent-wash: rgba(79, 210, 255, 0.08);
  --accent-wash-strong: rgba(79, 210, 255, 0.14);
  --accent-line: rgba(79, 210, 255, 0.4);
  --accent-line-strong: rgba(79, 210, 255, 0.5);
  --warn-wash: rgba(255, 196, 107, 0.07);
  --bad-line: rgba(255, 143, 122, 0.45);
  --warn-line: rgba(255, 196, 107, 0.4);
  --good-line: rgba(82, 224, 168, 0.4);

  --font: "Google Sans Flex", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

:root[data-theme="light"] {
  --bg: #f2f7fb;
  --panel: #ffffff;
  --panel-2: #e9f3fa;
  --line: rgba(13, 40, 61, 0.14);
  --ink: #0c1e2a;
  --muted: rgba(13, 40, 61, 0.64);
  --faint: rgba(13, 40, 61, 0.42);
  --cyan: #0a84ac;
  --good: #10855c;
  --warn: #a5700f;
  --bad: #c1402f;
  --on-accent: #ffffff;

  --navbar-bg: rgba(255, 255, 255, 0.86);
  --track-bg: rgba(13, 40, 61, 0.08);
  --row-bg: rgba(13, 40, 61, 0.035);
  --accent-wash-soft: rgba(10, 132, 172, 0.06);
  --accent-wash: rgba(10, 132, 172, 0.08);
  --accent-wash-strong: rgba(10, 132, 172, 0.14);
  --accent-line: rgba(10, 132, 172, 0.35);
  --accent-line-strong: rgba(10, 132, 172, 0.5);
  --warn-wash: rgba(165, 112, 15, 0.08);
  --bad-line: rgba(193, 64, 47, 0.4);
  --warn-line: rgba(165, 112, 15, 0.35);
  --good-line: rgba(16, 133, 92, 0.35);
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  transition: background-color 220ms ease, color 220ms ease;
}

h2 { margin: 0; font-size: 15px; font-weight: 800; letter-spacing: 0.01em; }
h3 { margin: 16px 0 6px; font-size: 11px; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; color: var(--faint); }
p { margin: 0 0 8px; line-height: 1.55; }
ul { margin: 0 0 8px; padding-left: 18px; }
li { margin-bottom: 4px; line-height: 1.5; }

.note { color: var(--faint); font-size: 12px; line-height: 1.5; }

/* top navigation bar (kept distinct from the .bar score-meter track below) */

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 3vw, 32px);
  border-bottom: 1px solid var(--line);
  background: var(--navbar-bg);
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.mark { color: var(--cyan); }

.nav-right { display: flex; align-items: center; gap: 8px; }

.tabs { display: flex; gap: 4px; }

.tab {
  padding: 7px 15px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 700;
  text-transform: capitalize;
  cursor: pointer;
}

.tab.on { background: var(--accent-wash-strong); border-color: var(--accent-line); color: var(--cyan); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.theme-toggle:hover { border-color: var(--accent-line-strong); color: var(--ink); }

/* layout */

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.85fr);
  gap: 16px;
  align-items: start;
  padding: 16px clamp(16px, 3vw, 32px) 48px;
}

.col { display: grid; gap: 16px; min-width: 0; }

.side { position: sticky; top: 74px; }

.card {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.card.accent { border-color: var(--accent-line-strong); background: var(--panel-2); }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.head-actions { display: flex; gap: 6px; }

.pill {
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

/* buttons */

.btn {
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.btn:hover { border-color: var(--accent-line-strong); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.primary { background: var(--cyan); border-color: var(--cyan); color: var(--on-accent); }
.btn.ghost { color: var(--muted); }

/* score */

.dims { display: grid; gap: 9px; margin-top: 10px; }
.dim-top { display: flex; justify-content: space-between; font-size: 12px; margin-bottom: 4px; }
.dim-top span { color: var(--muted); }
.bar { height: 5px; border-radius: 3px; background: var(--track-bg); overflow: hidden; }
.bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--good)); }

/* guardrails */

.warn { padding: 10px 12px; margin-bottom: 8px; border-left: 2px solid var(--warn); border-radius: 0 8px 8px 0; background: var(--warn-wash); }
.warn.info { border-left-color: var(--cyan); background: var(--accent-wash-soft); }
.warn strong { display: block; margin-bottom: 3px; font-size: 13px; }
.warn p { margin: 0; font-size: 12.5px; color: var(--muted); }
.warn .action { margin-top: 5px; color: var(--cyan); }

/* timeline */

.timeline { display: grid; gap: 5px; }

.tl-row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--row-bg);
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.tl-row:hover { background: var(--accent-wash); }
.tl-row.on { border-color: var(--accent-line-strong); background: var(--accent-wash-strong); }

.tl-time { font-size: 12px; font-weight: 800; font-variant-numeric: tabular-nums; }
.tl-time em { display: block; font-style: normal; font-weight: 500; color: var(--faint); }
.tl-title { display: block; font-weight: 700; margin-bottom: 5px; }
.tl-meta { font-size: 12px; font-weight: 800; text-align: right; font-variant-numeric: tabular-nums; }
.tl-meta em { display: block; font-style: normal; font-weight: 500; color: var(--faint); }

.tags { display: flex; flex-wrap: wrap; gap: 4px; }

.tag {
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.tag.fixed { border-color: var(--bad-line); color: var(--bad); }
.tag.semi { border-color: var(--warn-line); color: var(--warn); }
.tag.flex { border-color: var(--good-line); color: var(--good); }
.tag.goal { border-color: var(--accent-line); color: var(--cyan); }

/* tasks + habits */

.tasks { display: grid; gap: 4px; }

.task, .habit { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 9px 10px; border-radius: 9px; background: var(--row-bg); }
.habit { grid-template-columns: minmax(0, 1fr); }

.check { width: 22px; height: 22px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--faint); cursor: pointer; line-height: 1; }
.task-body strong { display: block; margin-bottom: 5px; font-size: 13.5px; }
.score { font-size: 15px; font-weight: 900; color: var(--cyan); font-variant-numeric: tabular-nums; }

.tradeoff { margin-top: 10px; padding: 11px 12px; border: 1px dashed var(--line); border-radius: 9px; }
.tradeoff strong { display: block; margin-bottom: 4px; font-size: 11px; letter-spacing: 0.13em; text-transform: uppercase; color: var(--faint); }
.tradeoff p { font-size: 13px; }

.habit { margin-bottom: 6px; }
.adapt { margin-top: 9px; padding: 10px 11px; border-radius: 8px; background: var(--accent-wash); }
.adapt p { font-size: 12.5px; color: var(--muted); }

/* horizon chain */

.chain { display: grid; gap: 6px; }
.chain-row { display: grid; grid-template-columns: 62px minmax(0, 1fr); gap: 12px; align-items: center; padding: 9px 10px; border-radius: 9px; background: var(--row-bg); }
.chain-label { font-size: 10.5px; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; color: var(--faint); }
.chain-items { display: flex; flex-wrap: wrap; gap: 5px; }
.chain-item { padding: 3px 9px; border: 1px solid var(--line); border-radius: 6px; font-size: 12.5px; font-weight: 600; }
.chain-item.empty { color: var(--faint); }

/* advisor */

.obs { padding: 9px 11px; border-radius: 8px; background: var(--accent-wash-strong); font-weight: 700; font-size: 13px; }
.rec { margin-top: 12px; padding: 11px 12px; border-left: 2px solid var(--cyan); border-radius: 0 8px 8px 0; background: var(--accent-wash); }
.rec strong { display: block; margin-bottom: 4px; }
.rec p { margin: 0; font-size: 12.5px; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 8px; }

/* what-if */

.chips { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 12px; }
.chip { padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--muted); font: inherit; font-size: 12.5px; font-weight: 600; cursor: pointer; }
.chip:hover { border-color: var(--accent-line-strong); color: var(--ink); }
.chip.on { border-color: var(--cyan); background: var(--accent-wash-strong); color: var(--cyan); }
.sim p { font-size: 13px; }

/* compare */

.cmp { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cmp h3 { display: flex; align-items: center; gap: 7px; margin-top: 0; }
.cmp-row { padding: 5px 8px; margin-bottom: 3px; border-radius: 6px; background: var(--row-bg); font-size: 12.5px; font-variant-numeric: tabular-nums; }

.deltas { display: grid; gap: 4px; }
.delta { display: flex; justify-content: space-between; padding: 6px 10px; border-radius: 7px; background: var(--row-bg); font-size: 12.5px; }
.delta span { color: var(--muted); }
.delta.up strong { color: var(--good); }
.delta.down strong { color: var(--bad); }

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .side { position: static; }
  .cmp { grid-template-columns: 1fr; }
  .navbar { flex-wrap: wrap; }
}