/* Root index — deliberately neutral. Inter only. Off-white. No surprises. */

:root {
  --bg: #FAFAF7;
  --card: #FFFFFF;
  --ink: #15191F;
  --dim: #5E6470;
  --rule: #E4E5E8;
  --rule-strong: #C8CBD1;
  --accent: #1F3A8A;
  --visited: #0E8A4B;
  --shadow: 0 1px 0 rgba(20, 24, 32, 0.04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.hdr {
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.hdr-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  display: inline-block;
}
.hdr-meta {
  display: flex;
  gap: 18px;
  color: var(--dim);
  font-size: 13px;
}
.meta-item { white-space: nowrap; }

/* Page */
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.intro {
  max-width: 720px;
  margin-bottom: 48px;
}
.intro h1 {
  font-size: 36px;
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}
.intro p {
  color: var(--ink);
  margin: 0 0 12px;
}
.intro p.intro-sub {
  color: var(--dim);
  font-size: 14px;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 22px 22px 18px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease;
  scroll-margin-top: 96px;
}
.card.highlighted {
  border-color: var(--ink);
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 4px;
}
.card-num {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 0.04em;
}
.card-name {
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 4px;
}
.card-tagline {
  color: var(--ink);
  margin: 0 0 14px;
}
.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 22px;
  padding: 0 9px;
  border-radius: 11px;
  border: 1px solid var(--rule);
  font-size: 12px;
  color: var(--dim);
  background: var(--bg);
}
.chip.visited {
  border-color: var(--visited);
  color: var(--visited);
}
.chip.visited::before {
  content: '✓';
  font-size: 11px;
}

.card-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 14px;
  border-radius: 5px;
  border: 1px solid var(--rule-strong);
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { background: var(--bg); }
.btn-primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn-primary:hover { background: #000; }
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* Survey panel */
.survey {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--rule);
  border-radius: 5px;
}
.survey-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.survey-title { font-size: 13px; font-weight: 600; }
.survey-close {
  background: none;
  border: 0;
  font-size: 18px;
  color: var(--dim);
  cursor: pointer;
  line-height: 1;
}
.survey-body { display: flex; flex-direction: column; gap: 18px; }
.q { display: flex; flex-direction: column; gap: 8px; }
.q-text { font-size: 14px; font-weight: 500; }
.q-help { font-size: 12px; color: var(--dim); margin-top: -4px; }
.choices { display: flex; flex-direction: column; gap: 6px; }
.choice {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--card);
  cursor: pointer;
  font-size: 13px;
}
.choice:hover { border-color: var(--rule-strong); }
.choice input { margin: 0; }
.rating {
  display: flex;
  gap: 6px;
}
.rating button {
  flex: 1;
  height: 36px;
  border: 1px solid var(--rule);
  background: var(--card);
  border-radius: 4px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}
.rating button.selected {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.open-input {
  width: 100%;
  min-height: 70px;
  padding: 10px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  font: inherit;
  font-size: 13px;
  resize: vertical;
  background: var(--card);
}
.survey-foot {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.survey-status {
  font-size: 12px;
  color: var(--dim);
}

/* Footer */
.ftr {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--dim);
}
.ftr code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
}