:root {
  --bg: #0f1220;
  --surface: #191d33;
  --surface-2: #222741;
  --text: #eef1fb;
  --muted: #a6adc8;
  --border: #333a5c;
  --accent: #7c8cff;
  --accent-ink: #0b0e1c;
  --good: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
  --radius: 12px;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6fb;
    --surface: #ffffff;
    --surface-2: #eef0f8;
    --text: #16192b;
    --muted: #55607d;
    --border: #d5d9e8;
    --accent: #4f5fe0;
    --accent-ink: #ffffff;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
a { color: var(--accent); }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: var(--accent-ink);
  padding: 8px 14px; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

header.app-bar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px; border-bottom: 1px solid var(--border);
  background: var(--surface); flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.2rem; letter-spacing: 0.5px; }
.brand small { font-weight: 400; color: var(--muted); font-size: 0.75rem; display: block; }

nav.primary ul { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; flex-wrap: wrap; }
nav.primary a {
  display: inline-block; padding: 8px 12px; border-radius: 8px;
  color: var(--text); text-decoration: none; font-size: 0.95rem;
}
nav.primary a[aria-current="page"] { background: var(--accent); color: var(--accent-ink); }
nav.primary a:hover { background: var(--surface-2); }

main { max-width: 860px; margin: 0 auto; padding: 24px 20px 80px; }
h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1.2rem; margin: 24px 0 8px; }
h3 { font-size: 1rem; margin: 16px 0 6px; }
p.lead { color: var(--muted); margin-top: 0; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px; margin: 14px 0;
}
.card h2:first-child, .card h3:first-child { margin-top: 0; }

.grid { display: grid; gap: 14px; }
@media (min-width: 640px) { .grid.cols-2 { grid-template-columns: 1fr 1fr; } }

label { display: block; font-weight: 600; margin: 12px 0 4px; }
label .hint { display: block; font-weight: 400; color: var(--muted); font-size: 0.85rem; }
input, select, textarea, button {
  font: inherit; color: var(--text);
}
input[type="text"], input[type="email"], input[type="number"], select, textarea {
  width: 100%; padding: 10px 12px; background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 8px;
}
textarea { min-height: 84px; resize: vertical; }

button {
  cursor: pointer; padding: 10px 16px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text); font-weight: 600;
}
button.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.small { padding: 6px 10px; font-size: 0.85rem; }

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }

.meter {
  height: 14px; background: var(--surface-2); border-radius: 999px; overflow: hidden;
  border: 1px solid var(--border);
}
.meter > span { display: block; height: 100%; background: var(--accent); }

.badge {
  display: inline-block; padding: 2px 10px; border-radius: 999px;
  font-size: 0.8rem; font-weight: 600; border: 1px solid var(--border);
}
.badge.on_track { color: var(--good); border-color: var(--good); }
.badge.slipping { color: var(--warn); border-color: var(--warn); }
.badge.stalled { color: var(--bad); border-color: var(--bad); }

ul.tasks { list-style: none; padding: 0; margin: 8px 0; }
ul.tasks li {
  display: flex; align-items: flex-start; gap: 10px; padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
ul.tasks li:last-child { border-bottom: none; }
.task-done { text-decoration: line-through; color: var(--muted); }
.due { color: var(--muted); font-size: 0.85rem; }

.chat-log { display: flex; flex-direction: column; gap: 10px; margin: 12px 0; }
.msg { padding: 10px 14px; border-radius: 12px; max-width: 90%; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--accent); color: var(--accent-ink); }
.msg.assistant { align-self: flex-start; background: var(--surface-2); border: 1px solid var(--border); }

.notice { padding: 10px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface-2); }
.notice.error { border-color: var(--bad); color: var(--bad); }
.notice.success { border-color: var(--good); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.muted { color: var(--muted); }
.likert { display: flex; gap: 6px; flex-wrap: wrap; }
.likert label {
  font-weight: 400; margin: 0; display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2);
}
fieldset { border: 1px solid var(--border); border-radius: 10px; margin: 12px 0; padding: 12px 14px; }
legend { font-weight: 600; padding: 0 6px; }