/* Clarity: calm, warm, legible. Apple-like clarity, softer palette. */
:root {
  --bg: #f7f4ee;
  --surface: #fffdf9;
  --surface-2: #f0ece4;
  --text: #2b2a27;
  --muted: #6e6a62;
  --faint: #a39e94;
  --border: rgba(43, 42, 39, 0.09);
  --sage: #7c9a7e;
  --sage-deep: #587a5c;
  --sage-soft: #e3ebe2;
  --blue: #6f8fae;
  --blue-deep: #4b6b8a;
  --blue-soft: #e1e9f1;
  --stone: #b9b1a3;
  --amber-soft: #f3e9d7;
  --amber-deep: #8a6a2e;
  --rose-soft: #f1e1dd;
  --rose-deep: #8a4b40;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 1px 2px rgba(43, 42, 39, 0.04), 0 8px 24px rgba(43, 42, 39, 0.06);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1d1e1c;
    --surface: #262825;
    --surface-2: #2f312d;
    --text: #ece8e0;
    --muted: #a8a399;
    --faint: #7d786f;
    --border: rgba(236, 232, 224, 0.1);
    --sage: #93b296;
    --sage-deep: #b5cdb7;
    --sage-soft: #2f3b31;
    --blue: #8aa8c4;
    --blue-deep: #b6cbe0;
    --blue-soft: #2b3542;
    --stone: #7a7468;
    --amber-soft: #3d3426;
    --amber-deep: #e2c48e;
    --rose-soft: #40302d;
    --rose-deep: #e3a99e;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1d1e1c;
  --surface: #262825;
  --surface-2: #2f312d;
  --text: #ece8e0;
  --muted: #a8a399;
  --faint: #7d786f;
  --border: rgba(236, 232, 224, 0.1);
  --sage: #93b296;
  --sage-deep: #b5cdb7;
  --sage-soft: #2f3b31;
  --blue: #8aa8c4;
  --blue-deep: #b6cbe0;
  --blue-soft: #2b3542;
  --stone: #7a7468;
  --amber-soft: #3d3426;
  --amber-deep: #e2c48e;
  --rose-soft: #40302d;
  --rose-deep: #e3a99e;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { font-size: 17px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
h1, h2, h3 { font-weight: 600; letter-spacing: -0.015em; line-height: 1.2; margin: 0 0 0.4em; }
h1 { font-size: clamp(1.8rem, 3.6vw, 2.5rem); }
h2 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
a { color: var(--blue-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
small, .muted { color: var(--muted); }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 42rem; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }

.shell { width: 100%; max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.shell.narrow { max-width: 620px; }
main.shell { padding-top: 32px; padding-bottom: 56px; animation: rise 0.5s ease-out both; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { main.shell { animation: none; } * { transition: none !important; } }

/* Top bar */
.topbar { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: saturate(160%) blur(12px); border-bottom: 1px solid var(--border); }
.topbar-inner { display: flex; align-items: center; gap: 20px; height: 60px; }
.brand { font-weight: 600; font-size: 1.15rem; color: var(--text); display: inline-flex; align-items: center; gap: 10px; letter-spacing: -0.01em; }
.brand-mark { width: 14px; height: 14px; border-radius: 50%; background: radial-gradient(circle at 35% 35%, var(--sage), var(--sage-deep)); box-shadow: 0 0 0 4px var(--sage-soft); }
.topbar nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; flex-wrap: nowrap; white-space: nowrap; }
.topbar nav a { display: inline-block; padding: 6px 12px; border-radius: 999px; color: var(--muted); font-weight: 500; }
.topbar nav a:hover { background: var(--surface-2); text-decoration: none; color: var(--text); }
.topbar nav a[aria-current="page"] { background: var(--surface-2); color: var(--text); }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.who { color: var(--muted); font-size: 0.95rem; }
.who small { text-transform: capitalize; color: var(--faint); }
.theme-toggle { border: 1px solid var(--border); background: var(--surface); color: var(--muted); width: 36px; height: 36px; border-radius: 50%; cursor: pointer; font-size: 1rem; display: grid; place-items: center; }
.theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .moon, :root:not([data-theme="light"]) .theme-toggle .moon { display: inline; }
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .theme-toggle .sun { display: none; } }
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) .theme-toggle .moon { display: none; } :root:not([data-theme="dark"]) .theme-toggle .sun { display: inline; } }
@media (max-width: 720px) {
  .topbar nav { order: 3; width: 100%; overflow-x: auto; scrollbar-width: none; }
  .topbar-inner { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 10px; row-gap: 6px; }
  .who { display: none; }
}

/* Cards, surfaces */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.card + .card { margin-top: 16px; }
.card.soft { background: var(--surface-2); box-shadow: none; }
.stack > * + * { margin-top: 16px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 760px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.section { margin-top: 40px; }
hr.soft { border: 0; border-top: 1px solid var(--border); margin: 24px 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 20px; border-radius: 999px; border: 1px solid transparent; font: inherit; font-weight: 600; cursor: pointer; transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease; text-decoration: none; min-height: 44px; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--sage-deep); color: #fff; }
:root[data-theme="dark"] .btn-primary { color: #1d1e1c; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary { color: #1d1e1c; } }
.btn-primary:hover { box-shadow: 0 6px 18px rgba(88, 122, 92, 0.3); }
.btn-secondary { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-secondary:hover { background: var(--surface-2); }
.btn-quiet { background: transparent; color: var(--muted); padding: 8px 12px; min-height: 36px; }
.btn-quiet:hover { color: var(--text); background: var(--surface-2); }
.btn-danger { background: transparent; border-color: var(--border); color: var(--rose-deep); }
.btn-danger:hover { background: var(--rose-soft); }
.btn-block { width: 100%; }
.btn-lg { padding: 14px 26px; font-size: 1.05rem; }

/* Forms */
label, .label { display: block; font-weight: 600; margin-bottom: 6px; }
.help { color: var(--muted); font-size: 0.95rem; margin: -2px 0 12px; }
input[type="text"], input[type="number"], input[type="password"], textarea, select {
  width: 100%; font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px 14px; min-height: 48px; box-shadow: inset 0 1px 2px rgba(0,0,0,0.03);
}
input:focus, textarea:focus, select:focus { border-color: var(--blue); outline: none; box-shadow: 0 0 0 4px var(--blue-soft); }
textarea { min-height: 110px; resize: vertical; }
.field { margin-bottom: 18px; }
.error { color: var(--rose-deep); font-size: 0.95rem; margin-top: 6px; }
.check { display: flex; gap: 12px; align-items: flex-start; font-weight: 500; }
.check input { width: 22px; height: 22px; margin-top: 2px; accent-color: var(--sage-deep); flex: none; }

/* Choice cards (big radios / checkboxes) */
.choices { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.choices.cols-2 { grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .choices.cols-2 { grid-template-columns: 1fr; } }
.choice { position: relative; display: block; }
.choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.choice span.box { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-radius: var(--radius-sm); border: 1.5px solid var(--border); background: var(--surface); cursor: pointer; transition: border-color 0.15s, background 0.15s; min-height: 56px; font-weight: 500; }
.choice span.box::before { content: ""; width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--stone); flex: none; transition: all 0.15s; }
.choice.multi span.box::before { border-radius: 6px; }
.choice > label { margin: 0; }
.choice input:checked + label span.box { border-color: var(--sage-deep); background: var(--sage-soft); }
.choice input:checked + label span.box::before { border-color: var(--sage-deep); background: var(--sage-deep); box-shadow: inset 0 0 0 3px var(--surface); }
.choice input:focus-visible + label span.box { outline: 3px solid var(--blue); outline-offset: 2px; }
.choice small { display: block; color: var(--muted); font-weight: 400; }
.scale { display: flex; gap: 8px; }
.scale .choice { flex: 1; }
.scale .choice span.box { justify-content: center; padding: 14px 6px; }
.scale .choice span.box::before { display: none; }
.scale-labels { display: flex; justify-content: space-between; color: var(--muted); font-size: 0.9rem; margin-top: 6px; }
.grades-grid { display: grid; grid-template-columns: 1fr 120px; gap: 10px 14px; align-items: center; }
.grades-grid label { margin: 0; font-weight: 500; }

/* Progress */
.progress { height: 6px; background: var(--surface-2); border-radius: 999px; overflow: hidden; margin: 8px 0 28px; }
.progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--sage), var(--sage-deep)); border-radius: 999px; transition: width 0.4s ease; }
.step-label { color: var(--muted); font-size: 0.9rem; }
.q-actions { display: flex; gap: 10px; align-items: center; margin-top: 28px; flex-wrap: wrap; }
.q-actions .spacer { flex: 1; }
.q-title { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 6px; }

/* Entry */
.hero { text-align: center; padding: 48px 0 24px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3rem); }
.entry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px; }
@media (max-width: 640px) { .entry-grid { grid-template-columns: 1fr; } }
.entry-card { display: block; text-align: left; padding: 28px; border-radius: var(--radius); background: var(--surface); border: 1.5px solid var(--border); box-shadow: var(--shadow); color: var(--text); transition: transform 0.2s ease, border-color 0.2s; }
.entry-card:hover { transform: translateY(-2px); border-color: var(--sage); text-decoration: none; }
.entry-card h2 { margin-bottom: 6px; }
.entry-card p { color: var(--muted); margin: 0; }
.entry-card .eyebrow { display: inline-block; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--sage-deep); font-weight: 600; margin-bottom: 10px; }

/* Gate */
.gate { min-height: 70vh; display: grid; place-items: center; }
.gate .card { width: 100%; max-width: 420px; text-align: center; padding: 36px 28px; }
.gate .brand-mark { width: 22px; height: 22px; margin: 0 auto 16px; display: block; }

/* Banners, badges */
.banner { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 18px; font-size: 0.95rem; }
.banner-sample { background: var(--amber-soft); color: var(--amber-deep); }
.banner-ok { background: var(--sage-soft); color: var(--sage-deep); }
.banner-warn { background: var(--amber-soft); color: var(--amber-deep); }
.banner-error { background: var(--rose-soft); color: var(--rose-deep); }
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.8rem; font-weight: 600; background: var(--surface-2); color: var(--muted); white-space: nowrap; }
.badge-sage { background: var(--sage-soft); color: var(--sage-deep); }
.badge-blue { background: var(--blue-soft); color: var(--blue-deep); }
.badge-amber { background: var(--amber-soft); color: var(--amber-deep); }
.badge-rose { background: var(--rose-soft); color: var(--rose-deep); }

/* Provenance */
.prov { color: var(--faint); font-size: 0.8rem; display: block; margin-top: 2px; }
.prov a { color: inherit; text-decoration: underline dotted; }
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat .num { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.02em; }
.stat .what { color: var(--muted); font-size: 0.9rem; }

/* Odds band */
.band { margin: 10px 0 4px; }
.band-track { position: relative; height: 10px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.band-fill { position: absolute; top: 0; bottom: 0; border-radius: 999px; background: linear-gradient(90deg, var(--blue), var(--blue-deep)); opacity: 0.85; }
.band-ticks { display: flex; justify-content: space-between; color: var(--faint); font-size: 0.75rem; margin-top: 4px; }
.band-text { font-weight: 600; }

/* Program cards and lenses */
.program-card { display: grid; grid-template-columns: 1fr; gap: 18px; }
.program-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; flex-wrap: wrap; }
.program-head h3 { margin: 0; font-size: 1.2rem; }
.program-head .inst { color: var(--muted); }
.lens-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 760px) { .lens-grid { grid-template-columns: 1fr; } }
.lens { border-radius: var(--radius-sm); padding: 16px; background: var(--surface-2); }
.lens-student { background: var(--blue-soft); }
.lens-parent { background: var(--sage-soft); }
.lens h4 { margin: 0 0 10px; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.lens ul { padding-left: 18px; margin: 8px 0 0; }
.lens li { margin-bottom: 4px; font-size: 0.95rem; }
.drivers { list-style: none; padding: 0; margin: 8px 0 0; }
.drivers li { padding-left: 20px; position: relative; font-size: 0.95rem; margin-bottom: 4px; }
.drivers li::before { position: absolute; left: 0; font-weight: 700; }
.drivers li.up::before { content: "↑"; color: var(--sage-deep); }
.drivers li.down::before { content: "↓"; color: var(--rose-deep); }
.drivers li.wider::before { content: "↔"; color: var(--amber-deep); }
.drivers li.neutral::before { content: "·"; color: var(--muted); }
.diverge { border-left: 3px solid var(--amber-deep); padding: 8px 12px; background: var(--amber-soft); border-radius: 8px; margin-top: 10px; font-size: 0.95rem; }
.diverge strong { color: var(--amber-deep); }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
details summary { cursor: pointer; color: var(--blue-deep); font-weight: 500; }
details[open] summary { margin-bottom: 8px; }

/* Activity */
.activity { list-style: none; margin: 0; padding: 0; }
.activity li { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
.activity li:last-child { border-bottom: 0; }
.activity time { color: var(--faint); margin-left: auto; white-space: nowrap; font-size: 0.85rem; }

.invite-code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 1.6rem; letter-spacing: 0.08em; background: var(--surface-2); padding: 12px 18px; border-radius: var(--radius-sm); display: inline-block; }
.conversation { background: var(--surface-2); border-radius: var(--radius-sm); padding: 16px 18px; }
.conversation li { margin-bottom: 6px; }
.foot { padding: 20px; color: var(--faint); font-size: 0.85rem; text-align: center; border-top: 1px solid var(--border); }
.empty { text-align: center; padding: 40px 20px; color: var(--muted); }
.inline-form { display: inline; }
table.plain { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
table.plain th, table.plain td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.plain th { color: var(--muted); font-weight: 600; }