/* =================================================================
   Instructional Design Models – stylesheet
   Color tokens (--c-*) mirror the constants in app.js (the `C` object).
   Per-model colors are set inline via CSS custom properties on elements
   that need them (--m, --ml, --mm) so the same classes work for any
   model color.
   ================================================================= */

:root {
  --c-bg: #faf6f0;
  --c-surface: #ffffff;
  --c-border: #ede5d8;
  --c-text: #2d2318;
  --c-muted: #675A4E;
  --c-dim: #c4b4a4;

  --c-addie: #b8692a;
  --c-addie-l: #fef3e8;
  --c-addie-m: #f5dfc0;
  --c-sam: #3d7d47;
  --c-sam-l: #e6f4e8;
  --c-sam-m: #bce3c2;
  --c-back: #3d60a0;
  --c-back-l: #e6edf8;
  --c-back-m: #b8cde8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--c-bg);
  font-family: 'Nunito', sans-serif;
  color: var(--c-text);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #d8cfc4; border-radius: 3px; }

button { font-family: inherit; }

/* ───── App shell ───── */
.app {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  overflow: hidden;
}
.app-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
  box-shadow: 0 1px 10px rgba(45, 35, 24, 0.05);
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 62px;
}
.header-title { flex: 1; }
.title-main {
  font-size: 17px;
  font-weight: 800;
  color: rgb(107, 97, 88);
  letter-spacing: -0.3px;
}
.title-sub {
  font-size: 11px;
  color: rgb(105, 96, 87);
  margin-top: 1px;
}

.tabs {
  display: flex;
  background: #f0e8df;
  border-radius: 10px;
  padding: 3px;
  gap: 2px;
}
.tab {
  padding: 7px 22px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  background: transparent;
  color: rgb(138, 122, 106);
  transition: all 0.18s ease;
}
.tab.active {
  background: var(--c-surface);
  color: rgb(107, 97, 88);
  box-shadow: 0 1px 6px rgba(45, 35, 24, 0.1);
}

.app-main {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  align-self: stretch;
}

/* ───── Shared surface card ───── */
.card {
  background: var(--c-surface);
  border-radius: 16px;
  box-shadow: 0 2px 18px rgba(45, 35, 24, 0.06);
}

/* ───── Explore tab ───── */
.explore {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.model-picker {
  display: flex;
  gap: 8px;
  padding: 20px 28px 0;
  flex-shrink: 0;
}
.pill {
  padding: 8px 20px;
  border-radius: 24px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  border: 2px solid var(--m);
  background: transparent;
  color: rgb(114, 112, 110);
  transition: all 0.18s ease;
}
.pill.active {
  background: var(--m);
  color: rgba(255,255,255,1.00);
  box-shadow: 0 4px 14px color-mix(in srgb, var(--m) 25%, transparent);
}

.explore-body {
  flex: 1;
  display: flex;
  gap: 20px;
  padding: 16px 28px 24px;
  overflow: hidden;
}
.explore-body.wide { flex-direction: column; }

.diagram-card {
  flex-shrink: 0;
  padding: 28px 20px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 310px;
}
.explore-body.wide .diagram-card {
  width: auto;
  padding: 28px 32px 16px;
}
.diagram-hint {
  font-size: 13px;
  color: var(--c-muted);
}

.detail-card {
  flex: 1;
  overflow: hidden;
}

/* ───── Phase detail panel ───── */
.detail {
  padding: 28px 30px;
  height: 100%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.detail.overview { gap: 14px; }

.badge-row { display: flex; align-items: center; gap: 8px; }
.badge-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--m);
}
.badge-text {
  font-size: 11px;
  font-weight: 700;
  color: var(--m);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.model-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--c-text);
  line-height: 1.15;
}
.model-about {
  font-size: 14px;
  color: var(--c-muted);
  line-height: 1.7;
}
.model-about p + p { margin-top: 0.9em; }
.callout {
  padding: 12px 14px;
  background: var(--ml);
  border-radius: 10px;
  font-size: 13px;
  color: var(--m);
  font-weight: 600;
  line-height: 1.5;
}

.glance-block {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: flex-end;
}
.small-label {
  font-size: 12px;
  font-weight: 700;
  color: #000000 ;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 2px;
}
.glance-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border-radius: 8px;
  background: #f7f1ea;
}
.glance-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--m);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  color: #fff;
}
.glance-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-text);
  min-width: 90px;
}
.glance-headline {
  font-size: 12px;
  color: var(--c-muted);
  text-align: right;
  margin-left: auto;
}

/* phase detail view */
.phase-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.phase-badge {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--m);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--m) 27%, transparent);
}
.phase-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--c-text);
  line-height: 1.2;
}
.phase-headline {
  font-size: 13px;
  color: var(--m);
  font-weight: 700;
  margin-top: 2px;
}
.phase-desc {
  font-size: 14px;
  color: var(--c-muted);
  line-height: 1.7;
}
.questions { display: flex; flex-direction: column; gap: 8px; }
.question {
  display: flex;
  gap: 10px;
  font-size: 13px;
  color: var(--c-text);
  line-height: 1.55;
}
.q-mark {
  color: #000;
  font-weight: 800;
  font-size: 16px;
  line-height: 1.3;
  flex-shrink: 0;
}
.example-box {
  padding: 14px 16px;
  background: var(--ml);
  border-radius: 12px;
  border-left: 3px solid var(--m);
}
.example-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--m);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.example-text {
  font-size: 13px;
  color: var(--c-text);
  line-height: 1.65;
}

.fade-slide { animation: fadeSlide 0.22s ease; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

/* ───── Compare tab ───── */
.compare {
  padding: 20px 28px 28px;
  overflow-y: auto;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.compare-table {
  overflow: hidden;
  flex-shrink: 0;
}
.compare-row {
  display: grid;
  grid-template-columns: 150px 1fr 1fr 1fr;
}
.compare-row + .compare-row {
  border-top: 1px solid var(--c-border);
}
.compare-head-label {
  padding: 14px 16px;
  background: #f5ede0;
  font-size: 16px;
  font-weight: 700;
  color: #000000;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.compare-head-cell {
  padding: 14px 16px;
  background: var(--ml);
  border-left: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.compare-head-name {
  font-size: 15px;
  font-weight: 800;
  color: var(--m);
}
.compare-head-badge {
  font-size: 11px;
  color: var(--m);
  opacity: 0.65;
  font-weight: 600;
}
.compare-body { background: #fff; }
.compare-body.alt { background: #faf7f3; }
.compare-aspect {
  padding: 11px 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-muted);
}
.compare-cell {
  padding: 11px 16px;
  font-size: 13px;
  color: var(--c-text);
  border-left: 1px solid var(--c-border);
  line-height: 1.45;
}

/* ───── Practice tab ───── */
.practice {
  padding: 28px;
  overflow-y: auto;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.practice-heading .h {
  font-size: 20px;
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: 4px;
}
.practice-heading .sub {
  font-size: 14px;
  color: var(--c-muted);
}
.practice-card { padding: 24px 26px; }
.practice-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.scenario-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.dots { display: flex; align-items: center; gap: 6px; }
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  cursor: pointer;
  background: var(--c-border);
  transition: background 0.2s;
  border: none;
  padding: 0;
}
.dot.active { background: var(--c-text); }

.scenario-text {
  background: #faf6f0;
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 20px;
  border: 1px solid var(--c-border);
  font-size: 15px;
  color: var(--c-text);
  line-height: 1.75;
}
.scenario-hint {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-muted);
  font-style: italic;
}

.choice-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.choice-row.answered { margin-bottom: 18px; }
.choice {
  padding: 10px 26px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: 2px solid var(--m);
  background: transparent;
  color: var(--m);
  transition: all 0.18s ease;
}
.choice.correct {
  background: var(--m);
  color: #fff;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--m) 27%, transparent);
}
.choice.wrong {
  background: #fde8e8;
  color: #b03030;
  border-color: #d06060;
}
.choice.dimmed {
  color: var(--c-dim);
  border-color: var(--c-border);
  opacity: 0.99;
  cursor: default;
}
.choice.correct, .choice.wrong, .choice.dimmed { cursor: default; }

.feedback {
  padding: 16px 20px;
  border-radius: 12px;
  font-size: 14px;
  color: var(--c-text);
  line-height: 1.7;
  background: var(--ml);
  border-left: 3px solid var(--m);
  animation: fadeSlide 0.22s ease;
}
.feedback.wrong-fb {
  background: #fdf0f0;
  border-left-color: #c04040;
}
.feedback-head {
  font-weight: 800;
  margin-bottom: 6px;
  font-size: 15px;
  color: var(--m);
}
.feedback.wrong-fb .feedback-head { color: #c04040; }
.next-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 14px;
  padding: 8px 20px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  background: transparent;
  border: 2px solid var(--m);
  color: var(--m);
}