/* ═══════════════════════════════════════════════════════════
   Thrust 2 — Shared styles for Task 2.1 / 2.2 / 2.3 pages
   ═══════════════════════════════════════════════════════════ */

:root {
  --bg: #f0f3fa;
  --card: #ffffff;
  --border: #d4dae6;
  --text: #1e293b;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-soft: #dbeafe;
  --safe: #15803d;
  --safe-soft: #dcfce7;
  --harm: #b91c1c;
  --harm-soft: #fee2e2;
  --mod1: #4f46e5;
  --mod2: #0891b2;
  --mod3: #c2410c;
  --warn: #a16207;
  --warn-soft: #fef3c7;
  --radius: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", system-ui, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

/* ── Top navigation ── */

.t2-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: #0f172a;
  font-size: 0.85rem;
  flex-wrap: wrap;
}
.t2-nav-brand {
  font-weight: 700;
  color: #e2e8f0;
  text-decoration: none;
  margin-right: auto;
  font-size: 0.92rem;
}
.t2-nav-brand:hover { color: #fff; }
.t2-nav a {
  color: #94a3b8;
  text-decoration: none;
  padding: 5px 12px;
  border-radius: 6px;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.t2-nav a:hover { color: #e2e8f0; background: rgba(255,255,255,.08); }
.t2-nav a.active { color: #fff; background: var(--primary); }

/* ── Hero ── */

.t2-hero {
  text-align: center;
  padding: 32px 20px 22px;
  background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
  color: white;
}
.t2-hero h1 { font-size: 1.7rem; margin-bottom: 8px; }
.t2-hero .badge {
  display: inline-block;
  background: rgba(255,255,255,.18);
  padding: 3px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.03em;
}
.t2-hero p { font-size: 0.95rem; opacity: .88; max-width: 680px; margin: 0 auto; }

/* ── Page container ── */

.t2-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 50px;
}
.t2-page-wide {
  max-width: 1200px;
}

/* ── Section ── */

.t2-sec { margin-top: 28px; }
.t2-sec-title {
  font-size: 1.2rem;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.t2-sec-sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 14px; }

/* ── Card ── */

.t2-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.t2-card + .t2-card { margin-top: 14px; }
.layers-row .t2-card + .t2-card { margin-top: 0; }
.t2-card h3 { font-size: 1rem; margin-bottom: 8px; }
.t2-card p { font-size: 0.92rem; color: var(--muted); }

/* ── Footer ── */

.t2-footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
  font-size: 0.82rem;
}
.t2-footer a { color: var(--primary); text-decoration: none; }
.t2-footer a:hover { text-decoration: underline; }

/* ═══════════════════════════════════════════════
   Task 2.1 — Assessment
   ═══════════════════════════════════════════════ */

/* Scenario attempt panel */
.attempt-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.attempt-scenario {
  border-left: 4px solid var(--mod1);
}
.attempt-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.attempt-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  background: #f8fafc;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  text-align: left;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--text);
}
.attempt-option:hover { border-color: #93a5cc; background: #f1f5f9; }
.attempt-option.selected { border-color: var(--primary); background: var(--primary-soft); }
.attempt-option .opt-label { font-weight: 600; }
.attempt-option .opt-desc { color: var(--muted); font-size: 0.82rem; margin-top: 2px; }

.attempt-submit {
  margin-top: 14px;
  border: none;
  background: var(--primary);
  color: #fff;
  padding: 10px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: filter .15s;
}
.attempt-submit:hover { filter: brightness(.92); }
.attempt-submit:disabled { opacity: .5; cursor: not-allowed; }

/* Assessment layers row */
.layers-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  align-items: start;
}

/* Assessment layers */
.layer-card {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s, transform .5s;
  border-left: 4px solid var(--border);
}
.layer-card.visible {
  opacity: 1;
  transform: translateY(0);
}
.layer-card.l1 { border-left-color: var(--mod1); }
.layer-card.l2 { border-left-color: var(--mod2); }
.layer-card.l3 { border-left-color: var(--mod3); }

.layer-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.l1 .layer-tag { background: #ede9fe; color: var(--mod1); }
.l2 .layer-tag { background: #cffafe; color: var(--mod2); }
.l3 .layer-tag { background: #ffedd5; color: var(--mod3); }

/* Checklist */
.check-list { list-style: none; padding: 0; }
.check-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid #f1f5f9;
}
.check-list li:last-child { border-bottom: none; }
.check-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}
.check-icon.pass { background: var(--safe-soft); color: var(--safe); }
.check-icon.fail { background: var(--harm-soft); color: var(--harm); }

/* Rubric */
.rubric-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.rubric-item { padding: 10px; background: #f8fafc; border-radius: 8px; }
.rubric-label { font-size: 0.82rem; font-weight: 600; margin-bottom: 6px; }
.rubric-bar-track {
  height: 8px;
  background: #e2e8f0;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 4px;
}
.rubric-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1s ease;
  width: 0;
}
.rubric-bar-fill.high { background: var(--safe); }
.rubric-bar-fill.med  { background: var(--warn); }
.rubric-bar-fill.low  { background: var(--harm); }
.rubric-score {
  font-size: 0.78rem;
  color: var(--muted);
  text-align: right;
}
.rubric-feedback {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 6px;
  padding: 8px 12px;
  background: #f8fafc;
  border-radius: 8px;
  border-left: 3px solid var(--mod2);
}

/* Tutor chat */
.tutor-chat {
  max-height: 340px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 4px 0;
}
.tutor-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.5;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .4s, transform .4s;
}
.tutor-msg.visible {
  opacity: 1;
  transform: translateY(0);
}
.tutor-msg.tutor {
  align-self: flex-start;
  background: #ede9fe;
  color: #3b0764;
  border-bottom-left-radius: 4px;
}
.tutor-msg.student {
  align-self: flex-end;
  background: var(--primary-soft);
  color: #1e3a5f;
  border-bottom-right-radius: 4px;
}
.tutor-msg .msg-sender {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
  opacity: .7;
}

/* Overall score */
.overall-score {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 16px;
  background: #f8fafc;
  border-radius: 10px;
  margin-top: 16px;
  opacity: 0;
  transition: opacity .6s;
}
.overall-score.visible { opacity: 1; }
.score-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  background: var(--primary);
}
.score-circle small { font-size: 0.6rem; font-weight: 600; opacity: .8; }
.score-breakdown { font-size: 0.88rem; color: var(--muted); }
.score-breakdown strong { color: var(--text); }

/* ═══════════════════════════════════════════════
   Task 2.2 — Dashboard
   ═══════════════════════════════════════════════ */

/* KPI row */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.kpi-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.kpi-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.kpi-label {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 2px;
}
.kpi-trend {
  font-size: 0.78rem;
  margin-top: 6px;
  font-weight: 600;
}
.kpi-trend.up { color: var(--safe); }
.kpi-trend.down { color: var(--harm); }

/* Chart container */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.chart-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}
.chart-box h3 {
  font-size: 0.92rem;
  margin-bottom: 12px;
  color: var(--text);
}
.chart-box canvas { width: 100% !important; }

/* Filter bar */
.dash-filters {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.dash-filters label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
}
.dash-filters select {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.88rem;
  background: var(--card);
  color: var(--text);
}

/* Failure patterns table */
.fail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.fail-table th {
  text-align: left;
  padding: 8px 12px;
  background: #f1f5f9;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.fail-table td {
  padding: 10px 12px;
  border-bottom: 1px solid #f1f5f9;
}
.fail-pct {
  display: inline-block;
  min-width: 50px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.82rem;
  text-align: center;
}
.fail-pct.high { background: var(--harm-soft); color: var(--harm); }
.fail-pct.med  { background: var(--warn-soft); color: var(--warn); }
.fail-pct.low  { background: var(--safe-soft); color: var(--safe); }

/* Insight card */
.insight-card {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border: 1px solid #93c5fd;
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.insight-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}
.insight-body h3 { font-size: 1rem; margin-bottom: 6px; color: var(--primary); }
.insight-body p { font-size: 0.9rem; color: #1e40af; }
.insight-list {
  list-style: none;
  padding: 0;
  margin-top: 10px;
}
.insight-list li {
  padding: 6px 0;
  font-size: 0.88rem;
  color: #1e40af;
  border-bottom: 1px solid rgba(147,197,253,.3);
  display: flex;
  align-items: flex-start;
  gap: 6px;
}
.insight-list li:last-child { border-bottom: none; }

/* ═══════════════════════════════════════════════
   Task 2.3 — Authoring
   ═══════════════════════════════════════════════ */

/* Form layout */
.author-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 18px;
  align-items: start;
}
.author-form { display: flex; flex-direction: column; gap: 14px; }

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  margin-bottom: 5px;
}
.form-group label .optional {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.82rem;
}
.form-group input[type="text"],
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  padding: 8px 10px;
  font: inherit;
  font-size: 0.9rem;
  resize: vertical;
  background: #fff;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

/* Tool permission toggles */
.tool-toggles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.tool-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  font-size: 0.85rem;
}
.tool-toggle:hover { border-color: #93a5cc; }
.tool-toggle.active { border-color: var(--primary); background: var(--primary-soft); }
.tool-toggle input { display: none; }
.toggle-icon { font-size: 1.2rem; }
.toggle-switch {
  width: 36px;
  height: 20px;
  border-radius: 10px;
  background: #cbd5e1;
  position: relative;
  margin-left: auto;
  transition: background .2s;
  flex-shrink: 0;
}
.toggle-switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: left .2s;
}
.tool-toggle.active .toggle-switch { background: var(--primary); }
.tool-toggle.active .toggle-switch::after { left: 18px; }

/* Difficulty sliders */
.slider-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.slider-item label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.slider-item label span { font-weight: 400; color: var(--muted); font-size: 0.82rem; }
.slider-item input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  border-radius: 4px;
  background: #e2e8f0;
  outline: none;
}
.slider-item input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
}
.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: -2px;
}

/* Delivery mechanism */
.delivery-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.delivery-chip {
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  border: 1px solid var(--border);
  background: #f8fafc;
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
  color: var(--text);
}
.delivery-chip:hover { border-color: #93a5cc; }
.delivery-chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Preview panel */
.preview-panel {
  position: sticky;
  top: 20px;
}
.preview-card {
  background: var(--card);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 18px;
  min-height: 400px;
}
.preview-card h3 {
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.78rem;
}
.preview-scenario-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fafc;
  text-align: center;
  margin-bottom: 14px;
}
.preview-scenario-card .sc-icon { font-size: 2rem; }
.preview-scenario-card strong { font-size: 0.92rem; }
.preview-scenario-card small { color: var(--muted); font-size: 0.82rem; }

.preview-section {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid #f1f5f9;
}
.preview-section h4 {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}
.preview-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.preview-tool-chip {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}
.preview-diff-bar {
  height: 6px;
  background: #e2e8f0;
  border-radius: 3px;
  margin-top: 4px;
  overflow: hidden;
}
.preview-diff-fill {
  height: 100%;
  border-radius: 3px;
  transition: width .3s;
}
.preview-diff-fill.low { background: var(--safe); }
.preview-diff-fill.mid { background: var(--warn); }
.preview-diff-fill.high { background: var(--harm); }

.preview-payload {
  font-family: "Courier New", monospace;
  font-size: 0.78rem;
  background: #0f172a;
  color: #a5f3fc;
  padding: 10px;
  border-radius: 6px;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 120px;
  overflow-y: auto;
}

/* Export button */
.export-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.btn-export {
  border: none;
  background: var(--primary);
  color: #fff;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: filter .15s;
  display: flex;
  align-items: center;
  gap: 6px;
}
.btn-export:hover { filter: brightness(.92); }
.btn-secondary {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: filter .15s;
}
.btn-secondary:hover { filter: brightness(.95); }

/* Sustainability cards */
.sustain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.sustain-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.sustain-icon { font-size: 2rem; margin-bottom: 8px; }
.sustain-card h3 { font-size: 0.95rem; margin-bottom: 6px; }
.sustain-card p { font-size: 0.85rem; color: var(--muted); }

/* ═══════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════ */

@media (max-width: 768px) {
  .t2-page-wide { max-width: 100%; }
  .attempt-panel { grid-template-columns: 1fr; }
  .attempt-options { grid-template-columns: 1fr; }
  .layers-row { grid-template-columns: 1fr; }
  .layers-row .t2-card + .t2-card { margin-top: 14px; }
  .rubric-grid { grid-template-columns: 1fr; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .chart-grid { grid-template-columns: 1fr; }
  .author-layout { grid-template-columns: 1fr; }
  .preview-panel { position: static; }
  .tool-toggles { grid-template-columns: repeat(2, 1fr); }
  .sustain-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .kpi-row { grid-template-columns: 1fr; }
  .tool-toggles { grid-template-columns: 1fr; }
  .t2-nav { font-size: 0.78rem; }
}