:root {
  --bg: #e7ecf6;
  --panel: #ffffff;
  --panel-alt: #eef2f9;
  --panel-hover: #e2e8f5;
  --border: #dbe2f0;
  --text: #33415c;
  --text-dim: #7a8699;
  --accent: #2f6fed;
  --accent-2: #6366f1;
  --green: #1fb57a;
  --orange: #ff9f43;
  --red: #ef5164;
  --xp: #ff9f43;
  --danger: #ef5164;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(31,41,64,0.06), 0 4px 10px rgba(31,41,64,0.08), 0 14px 28px rgba(31,41,64,0.07);
  --input-bg: #ffffff;
  --tint-orange: #fff3e6;
  --tint-orange-hover: #fff3e2;
  --tint-orange-border: #ffe1b8;
  --tint-red: #fdece9;
  --tint-blue: #eef0fe;
  --tint-green: #e8faf3;
  --tint-green-text: #12805a;
  --tint-red-text: #c62f42;
  font-size: 18px;
}

html.dark-mode {
  --bg: #0f1420;
  --panel: #1a2130;
  --panel-alt: #212a3c;
  --panel-hover: #262f44;
  --border: #2c3650;
  --text: #eef1fb;
  --text-dim: #9aa8c5;
  --accent: #5b8dff;
  --accent-2: #8b8cf7;
  --green: #34d399;
  --orange: #ffb35c;
  --red: #ff7b8a;
  --xp: #ffb35c;
  --danger: #ff7b8a;
  --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 4px 10px rgba(0,0,0,0.35), 0 14px 28px rgba(0,0,0,0.3);
  --input-bg: #141a26;
  --tint-orange: #2e2517;
  --tint-orange-hover: #362a1b;
  --tint-orange-border: #4a3c22;
  --tint-red: #3a2228;
  --tint-blue: #232a44;
  --tint-green: #163229;
  --tint-green-text: #6ee7b7;
  --tint-red-text: #ff8a95;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text-dim);
  font-family: -apple-system, "system-ui", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  transition: background .2s ease, color .2s ease;
}

a { color: inherit; text-decoration: none; }

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 18px 60px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}
.brand .dot { color: var(--accent); }

.stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--tint-orange);
  border: none;
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--orange);
  white-space: nowrap;
}
.stat-pill b { color: var(--orange); }
.stat-pill.streak { background: var(--tint-red); color: var(--red); }
.stat-pill.streak b { color: var(--red); }
.stat-pill.level { background: var(--tint-blue); color: var(--accent-2); }
.stat-pill.level b { color: var(--accent-2); }

.backlink {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 14px;
  font-weight: 600;
}
.backlink:hover { color: var(--accent); }

.hero {
  background: linear-gradient(135deg, rgba(47,111,237,0.08), rgba(31,181,122,0.05));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 26px;
}
.hero h1 { margin: 0 0 6px; font-size: 1.5rem; color: var(--text); font-weight: 700; }
.hero p { margin: 0; color: var(--text-dim); line-height: 1.55; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
}

.daily-challenge {
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, var(--tint-orange), var(--panel));
  border: 1px solid var(--tint-orange-border);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 22px;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.daily-challenge:hover { background: var(--tint-orange-hover); }
.daily-challenge .dc-icon { font-size: 1.8rem; }
.daily-challenge .dc-body { flex: 1; }
.daily-challenge .dc-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--orange);
  font-weight: 700;
}
.daily-challenge .dc-title { font-size: 1.02rem; font-weight: 600; margin-top: 2px; color: var(--text); }
.daily-challenge .dc-go { font-weight: 700; color: var(--orange); white-space: nowrap; }

/* Kart-følelse: en svak stiplet "rute" bak fag-kortene og kapittel-nodene */
.map-grid, .chapter-path {
  position: relative;
}
.map-grid::before, .chapter-path::before {
  content: '';
  position: absolute;
  top: 38px;
  left: 4%;
  right: 4%;
  height: 2px;
  background-image: linear-gradient(90deg, var(--border) 60%, transparent 0%);
  background-size: 16px 2px;
  background-repeat: repeat-x;
  z-index: 0;
  opacity: 0.9;
}
.subject-card, .chapter-node { position: relative; z-index: 1; }

.subject-card, .chapter-node {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease;
  cursor: pointer;
}
.subject-card:hover, .chapter-node:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(31,41,64,0.08), 0 18px 32px rgba(31,41,64,0.08);
}

.subject-card .icon, .chapter-node .icon {
  font-size: 1.7rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel-alt);
  border-radius: 12px;
}
.subject-card h3, .chapter-node h3 { margin: 0; font-size: 1.2rem; color: var(--text); font-weight: 700; }
.subject-card p, .chapter-node p { margin: 0; color: var(--text-dim); font-size: 0.95rem; line-height: 1.45; }

.progress-bar {
  height: 8px;
  border-radius: 999px;
  background: var(--panel-alt);
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--green));
  border-radius: 999px;
}

.progress-label { font-size: 0.85rem; color: var(--text-dim); font-weight: 600; }

.chapter-node.done { border-color: var(--green); border-width: 2px; }
.chapter-node .badge {
  align-self: flex-start;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--tint-green);
  color: var(--green);
}
.chapter-node.locked { opacity: 0.55; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}

.topic-block h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--text);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.topic-block .explanation p { line-height: 1.6; margin: 0 0 10px; color: var(--text); }
.topic-block .explanation strong { color: var(--accent-2); font-weight: 700; }

.example, .exercise {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 10px 0;
  color: var(--text);
}
.example .label, .exercise .label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
}
.btn:hover { filter: brightness(0.9); }
.btn.secondary {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn.secondary:hover { background: var(--panel-alt); }
.btn.small { padding: 7px 13px; font-size: 0.82rem; border-radius: 7px; }

.exercise input[type="text"] {
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.95rem;
  width: 100%;
  max-width: 260px;
}
.exercise input[type="text"]:focus { outline: none; border-color: var(--accent); }

.feedback { margin-top: 8px; font-size: 0.9rem; font-weight: 600; }
.feedback.correct { color: var(--green); }
.feedback.incorrect { color: var(--red); }

.quiz-question {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.quiz-question:last-child { border-bottom: none; }
.quiz-question > div > b { color: var(--text); }
.quiz-options { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.quiz-option {
  text-align: left;
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 0.92rem;
}
.quiz-option:hover { border-color: var(--accent); }
.quiz-option.selected { border-color: var(--accent); background: var(--tint-blue); }
.quiz-option.correct { border-color: var(--green); background: var(--tint-green); color: var(--tint-green-text); }
.quiz-option.incorrect { border-color: var(--red); background: var(--tint-red); color: var(--tint-red-text); }

.quiz-result {
  text-align: center;
  padding: 20px;
}
.quiz-result .score { font-size: 2.2rem; font-weight: 700; color: var(--orange); }

.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--panel);
  border: 1px solid var(--green);
  border-radius: 12px;
  padding: 14px 18px;
  max-width: 420px;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity .25s ease, transform .25s ease;
  pointer-events: none;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.toast .title { font-weight: 700; color: var(--green); margin-bottom: 4px; font-size: 0.9rem; }
.toast .text { font-size: 0.88rem; color: var(--text-dim); line-height: 1.4; }

.footer-tools {
  margin-top: 30px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.empty-state {
  color: var(--text-dim);
  text-align: center;
  padding: 40px 10px;
}

/* Sidenavigasjon — samme sett med lenker på alle sider */
.nav-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.nav-tabs a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 15px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dim);
}
.nav-tabs a:hover { border-color: var(--accent); color: var(--accent); }
.nav-tabs a.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Bragder */
.achv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.achv-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.achv-card.locked { opacity: 0.55; }
.achv-card.earned { border-color: var(--green); }
.achv-icon {
  font-size: 1.6rem;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel-alt);
  border-radius: 12px;
}
.achv-card.earned .achv-icon { background: var(--tint-green); }
.achv-body h3 { margin: 0; font-size: 1.02rem; color: var(--text); }
.achv-body p { margin: 2px 0 0; font-size: 0.85rem; color: var(--text-dim); }
.achv-check { margin-left: auto; color: var(--green); font-size: 1.2rem; font-weight: 700; }

/* Svake punkter / blandet øving — enkle radlister */
.weak-list { display: flex; flex-direction: column; gap: 10px; }
.weak-row {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.weak-row .weak-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.weak-row .weak-tag.new { background: var(--tint-blue); color: var(--accent-2); }
.weak-row .weak-tag.low { background: var(--tint-red); color: var(--red); }
.weak-row .weak-title { font-weight: 600; color: var(--text); }
.weak-row .weak-sub { font-size: 0.85rem; color: var(--text-dim); }
.weak-row .weak-go { margin-left: auto; }

/* Ukesoversikt (foresatte) */
.week-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}
.week-stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.week-stat .num { font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.week-stat .label { font-size: 0.82rem; color: var(--text-dim); margin-top: 2px; }
.week-day-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.week-day-row:last-child { border-bottom: none; }
.week-day-row .wd-name { width: 90px; font-weight: 600; color: var(--text); font-size: 0.9rem; }
.week-day-row .wd-bar { flex: 1; height: 10px; background: var(--panel-alt); border-radius: 999px; overflow: hidden; }
.week-day-row .wd-bar > span { display: block; height: 100%; background: var(--accent); border-radius: 999px; }
.week-day-row .wd-count { font-size: 0.85rem; color: var(--text-dim); width: 70px; text-align: right; }

/* Tekststørrelse-bryter */
.a11y-toggle {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
}
.a11y-toggle:hover { border-color: var(--accent); color: var(--accent); }

.theme-toggle {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: 38px;
  height: 38px;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--accent); }
html.a11y-large { font-size: 20px; }
html.a11y-large .topic-block .explanation p,
html.a11y-large .example, html.a11y-large .exercise,
html.a11y-large .quiz-option { line-height: 1.75; }

.ov-problem { font-size: 1.05rem; color: var(--text); line-height: 1.5; }
#ov-progress, #prove-progress { color: var(--text-dim); font-weight: 600; margin-bottom: 14px; }

/* Fag-prøve */
.prove-timer {
  display: none;
  align-items: center;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-dim);
  margin-left: 10px;
}
.prove-timer.low { color: var(--orange); border-color: var(--orange); }
.prove-timer.out { color: var(--red); border-color: var(--red); }
.karakter-badge {
  display: inline-block;
  margin-top: 10px;
  background: var(--tint-blue);
  color: var(--accent-2);
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 1rem;
}
.prove-card {
  border-color: var(--accent-2) !important;
  background: linear-gradient(135deg, rgba(99,102,241,0.06), rgba(255,255,255,0));
}
.prove-card .badge.hint {
  background: var(--tint-blue);
  color: var(--accent-2);
}

/* Konfetti */
.confetti-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 100;
}
.confetti-piece {
  position: absolute;
  top: -20px;
  width: 9px;
  height: 14px;
  border-radius: 2px;
  animation-name: confetti-fall;
  animation-timing-function: ease-in;
  animation-fill-mode: forwards;
}
@keyframes confetti-fall {
  to {
    top: 105vh;
    transform: translateX(var(--drift)) rotate(540deg);
    opacity: 0.85;
  }
}

/* --- Visuelle forklaringer (core/visuals.js) --- */
.visual-block {
  margin: 14px 0;
  text-align: center;
}
.visual-caption {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-dim);
  font-style: italic;
}

.graph-svg, .balance-svg, .fraction-svg {
  width: 100%;
  max-width: 320px;
  height: auto;
}
.graph-grid { stroke: var(--border); stroke-width: 1; }
.graph-axis { stroke: var(--text-dim); stroke-width: 1.5; }
.graph-line { stroke: var(--accent); stroke-width: 2.5; }
.graph-point { fill: var(--red); }
.graph-point-label, .graph-axis-label { fill: var(--text-dim); font-size: 10px; }

.balance-post, .balance-cord { stroke: var(--text-dim); stroke-width: 2; }
.balance-base { fill: var(--text-dim); }
.balance-beam { stroke: var(--text); stroke-width: 3; stroke-linecap: round; }
.balance-pan { fill: var(--panel-alt); stroke: var(--accent-2); stroke-width: 2; }
.balance-text { fill: var(--text); font-size: 15px; font-weight: 700; }
.balance-equals { fill: var(--accent-2); font-size: 16px; font-weight: 700; }

.fraction-seg { fill: var(--panel-alt); stroke: var(--panel); stroke-width: 2; }
.fraction-seg.filled { fill: var(--accent); }

.visual-timeline {
  display: flex;
  overflow-x: auto;
  gap: 4px;
  padding: 10px 4px 4px;
}
.timeline-item {
  flex: 1 0 120px;
  text-align: center;
  position: relative;
  padding-top: 14px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  top: 4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--border);
}
.timeline-item:first-child::before { left: 50%; }
.timeline-item:last-child::before { right: 50%; }
.timeline-dot {
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-2);
}
.timeline-year { font-weight: 700; color: var(--accent-2); font-size: 0.9rem; margin-top: 6px; }
.timeline-label { font-size: 0.82rem; color: var(--text-dim); margin-top: 2px; padding: 0 4px; }

.visual-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  max-width: 360px;
  margin: 0 auto;
}
.flow-step {
  width: 100%;
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  text-align: left;
}
.flow-step-title { font-weight: 700; color: var(--accent-2); font-size: 0.9rem; }
.flow-step-text { font-size: 0.88rem; color: var(--text-dim); margin-top: 2px; }
.flow-arrow { color: var(--text-dim); font-size: 1.1rem; line-height: 1; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.data-table th, .data-table td {
  border: 1px solid var(--border);
  padding: 7px 10px;
  text-align: left;
}
.data-table th {
  background: var(--panel-alt);
  color: var(--text);
  font-weight: 700;
}
.data-table td { color: var(--text-dim); }

.step-reveal-list { margin-top: 8px; }
.step-item {
  background: var(--panel-alt);
  border-left: 3px solid var(--accent-2);
  border-radius: 6px;
  padding: 8px 12px;
  margin-bottom: 8px;
}
.step-item .step-num {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--accent-2);
  margin-bottom: 2px;
}
.step-reveal-btn { margin-top: 4px; }

@media (max-width: 560px) {
  :root { font-size: 17px; }
  .wrap { padding: 16px 12px 50px; }
}