/* =========================================================
   TPD Altklausur-Trainer
   v2 – Bahnschrift/Consolas, ohne Karomuster
   ========================================================= */

:root {
  /* Cremepapier-Palette */
  --paper:        #f4ede0;
  --paper-soft:   #f9f1de;
  --paper-deep:   #ebe2cf;
  --ink:          #1a1814;
  --ink-soft:     #4a4438;
  --ink-faint:    #8a8170;
  --accent:       #1f4e8a;
  --accent-soft:  #3a6cae;
  --accent-bg:    rgba(31, 78, 138, 0.08);
  --rule:         rgba(26, 24, 20, 0.18);
  --rule-soft:    rgba(26, 24, 20, 0.10);
  --highlight:    #c8542a;
  --good:         #3a7d3a;
  --good-bg:      rgba(58, 125, 58, 0.10);
  --bad:          #b04632;
  --bad-bg:       rgba(176, 70, 50, 0.10);

  /* Schriften – technisch, klar */
  --font-display: 'Bahnschrift', 'Bahnschrift Condensed', 'Roboto Condensed', 'Helvetica Neue Condensed', 'Arial Narrow', sans-serif;
  --font-body:    'Bahnschrift Light', 'Bahnschrift', 'Roboto', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'Consolas', 'JetBrains Mono', 'Menlo', ui-monospace, 'Courier New', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; }

/* ====== Views ====== */
.view {
  display: none;
  max-width: 920px;
  margin: 0 auto;
  padding: 60px 32px 80px;
}
.view-active { display: block; }

/* ====== Brand / Landing ====== */
.brand {
  margin-bottom: 48px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--rule);
}
.brand-mark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--accent);
  background: var(--accent-bg);
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: 18px;
}
.brand-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.0;
  margin: 0 0 6px;
  letter-spacing: 0.005em;
  text-transform: uppercase;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

/* ===== Phase-Tabs (AP1 / AP2 / WiSo) ===== */
.phase-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 36px;
  background: var(--paper-deep);
  padding: 6px;
  border-radius: 4px;
  border: 1px solid var(--rule-soft);
}
.phase-tab {
  flex: 1;
  border: none;
  background: transparent;
  padding: 12px 16px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.15s ease, color 0.15s ease;
  position: relative;
}
.phase-tab:hover:not([disabled]):not(.is-active) {
  background: rgba(255,255,255,0.4);
  color: var(--ink);
}
.phase-tab.is-active {
  background: var(--ink);
  color: var(--paper);
}
.phase-tab[disabled] {
  cursor: not-allowed;
  color: var(--ink-faint);
  opacity: 0.65;
}
.phase-tab[disabled]::after {
  content: "in Vorbereitung";
  display: block;
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink-faint);
  margin-top: 2px;
}

/* ===== Section Heading ===== */
.section-head {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule-soft);
}

/* ===== Mode Cards ===== */
.modes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 48px;
}
.mode-card {
  background: var(--paper-deep);
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  padding: 24px 22px 22px;
  text-align: left;
  cursor: pointer;
  color: inherit;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  position: relative;
  overflow: hidden;
}
.mode-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-left: 3px solid transparent;
  transition: border-left-color 0.15s ease;
  pointer-events: none;
}
.mode-card:hover {
  transform: translateY(-2px);
  background: var(--paper-soft);
}
.mode-card:hover::before { border-left-color: var(--accent); }
.mode-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}
.mode-card h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  margin: 6px 0 4px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.mode-card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.45;
}

.status {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px dashed var(--rule);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}

/* ===== Generischer Zurück-Button ===== */
.back-btn {
  background: none;
  border: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  cursor: pointer;
  padding: 4px 0;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}
.back-btn:hover { color: var(--accent); }

/* ===== Auswahlseiten ===== */
.select-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 600;
  margin: 0 0 28px;
  letter-spacing: 0.005em;
  text-transform: uppercase;
}
.select-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.select-list li button {
  width: 100%;
  text-align: left;
  background: var(--paper-deep);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid transparent;
  border-radius: 2px;
  padding: 16px 20px;
  color: inherit;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-left-color 0.12s ease, background 0.12s ease;
}
.select-list li button:hover {
  border-left-color: var(--accent);
  background: var(--paper-soft);
}
.select-list .item-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

/* ===== Anzahl-Buttons (Theme-Optionen) ===== */
.size-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 8px;
}
.size-btn {
  background: var(--paper-deep);
  border: 1px solid var(--rule-soft);
  padding: 24px 16px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
  border-radius: 4px;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.size-btn:hover {
  border-color: var(--accent);
  background: var(--paper-soft);
  transform: translateY(-2px);
}
.size-btn small {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--ink-faint);
  margin-top: 6px;
  text-transform: none;
  letter-spacing: 0.04em;
}

/* ===== Briefing Page (vor Klausur-Start) ===== */
.briefing {
  background: var(--paper-soft);
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  padding: 36px 40px;
  margin-bottom: 24px;
}
.briefing-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.briefing h2 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: 0.005em;
  text-transform: uppercase;
}
.briefing-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  margin-bottom: 24px;
}
.briefing-image {
  margin: 24px 0;
  text-align: center;
  background: white;
  padding: 24px;
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
}
.briefing-image img,
.briefing-image svg { max-width: 100%; height: auto; }
.briefing-image .placeholder {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  padding: 60px 20px;
  border: 1px dashed var(--rule);
  border-radius: 2px;
}
.briefing-text {
  font-size: 16px;
  color: var(--ink);
  margin: 16px 0 0;
}

/* ===== Frage-Ansicht ===== */
.q-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 24px;
}
.q-header .back-btn { margin-bottom: 0; }
.q-progress { flex: 1; max-width: 320px; }
#q-counter {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  display: block;
  text-align: right;
  margin-bottom: 6px;
}
.q-bar {
  height: 2px;
  background: var(--rule);
  position: relative;
  overflow: hidden;
}
#q-bar-fill {
  position: absolute;
  inset: 0 100% 0 0;
  background: var(--accent);
  transition: right 0.3s ease;
}
.q-score {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}
.q-score .knew  { color: var(--good); }
.q-score .didnt { color: var(--bad); }

.q-card {
  background: var(--paper-soft);
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  padding: 32px 36px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02), 0 6px 18px rgba(80, 60, 30, 0.04);
}

.q-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  background: var(--paper-deep);
  color: var(--ink-soft);
  border-radius: 2px;
}
.tag-points {
  background: rgba(200, 84, 42, 0.10);
  color: var(--highlight);
}

.q-id {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  margin: 0 0 18px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.q-frage {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  margin-bottom: 24px;
}
.q-frage img,
.q-frage svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 20px auto;
  background: white;
  padding: 14px;
  border: 1px solid var(--rule-soft);
  border-radius: 2px;
}
.q-frage ol, .q-frage ul { padding-left: 1.4em; }
.q-frage blockquote {
  border-left: 3px solid var(--accent);
  margin: 14px 0;
  padding: 8px 16px;
  background: var(--accent-bg);
  font-size: 16px;
}

.q-actions {
  margin: 20px 0 0;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border: none;
  padding: 13px 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.15s ease, transform 0.15s ease;
}
.btn-primary:hover {
  background: var(--accent);
  transform: translateY(-1px);
}
.btn-knew, .btn-didnt {
  border: none;
  padding: 13px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn-knew {
  background: var(--good);
  color: white;
}
.btn-knew:hover { background: #2f6b2f; transform: translateY(-1px); }
.btn-didnt {
  background: var(--bad);
  color: white;
}
.btn-didnt:hover { background: #963b29; transform: translateY(-1px); }

.q-loesung {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px dashed var(--rule);
  animation: reveal 0.35s ease;
}
@keyframes reveal {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.q-loesung h3 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}
#q-loesung { font-size: 16px; line-height: 1.6; }
#q-loesung p { margin: 10px 0; }
#q-loesung ul, #q-loesung ol { padding-left: 1.4em; margin: 12px 0; }
#q-loesung li { margin: 6px 0; }
#q-loesung li::marker { color: var(--ink-faint); }
#q-loesung strong { color: var(--ink); font-weight: 600; }
#q-loesung em { color: var(--ink-soft); font-style: italic; }
#q-loesung h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 22px 0 8px;
}
#q-loesung blockquote {
  margin: 14px 0;
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--rule-soft);
  color: var(--ink-soft);
  font-style: italic;
}
#q-loesung .katex-display,
#q-frage .katex-display {
  margin: 22px 0;
  padding: 4px 0;
  overflow-x: auto;
}

.hidden { display: none !important; }

.q-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 22px;
}
.btn-nav {
  background: none;
  border: 1px solid var(--rule);
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: 2px;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.btn-nav:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-nav:disabled { opacity: 0.3; cursor: not-allowed; }

/* ====== Summary (am Ende eines Sets) ====== */
.summary {
  background: var(--paper-soft);
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  padding: 40px 44px;
}
.summary-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.summary h2 {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 600;
  margin: 0 0 24px;
  letter-spacing: 0.005em;
  text-transform: uppercase;
}
.summary-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 24px 0 32px;
}
.stat-card {
  background: var(--paper);
  border: 1px solid var(--rule-soft);
  padding: 18px;
  border-radius: 2px;
}
.stat-num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 600;
  line-height: 1;
}
.stat-num.knew  { color: var(--good); }
.stat-num.didnt { color: var(--bad); }
.stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  margin-top: 6px;
  text-transform: uppercase;
}
.summary-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 28px;
  border-top: 1px solid var(--rule-soft);
}
.summary-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.summary-list .miss-q {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}
.summary-list .miss-text {
  flex: 1;
  font-size: 14px;
  color: var(--ink-soft);
}
.summary-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* Responsive */
@media (max-width: 640px) {
  .view { padding: 32px 16px 60px; }
  .q-card, .briefing, .summary { padding: 22px 18px; }
  .q-id { font-size: 18px; }
  .q-frage { font-size: 16px; }
  .brand-title { font-size: 36px; }
  .summary h2 { font-size: 32px; }
  .phase-tabs { flex-direction: column; }
}