:root {
  --bg-top: #f9f7ef;
  --bg-bottom: #d6f0ff;
  --panel: rgba(255, 255, 255, 0.86);
  --panel-border: rgba(18, 42, 66, 0.08);
  --text: #16324f;
  --muted: #4f6b86;
  --accent: #1f6feb;
  --accent-dark: #174ea6;
  --success: #168a4b;
  --warning: #b75a00;
  --danger: #b42318;
  --shadow: 0 18px 45px rgba(22, 50, 79, 0.14);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  -webkit-text-size-adjust: 100%;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.9), transparent 28%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

button,
input,
select {
  font: inherit;
}

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.app-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 0 max(24px, env(safe-area-inset-bottom));
}

.gate-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.gate-card {
  width: min(560px, 100%);
  padding: 32px;
  backdrop-filter: blur(18px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.gate-row {
  margin: 24px 0 14px;
}

.home-hero {
  margin-bottom: 20px;
}

.home-summary {
  min-height: 100%;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.topic-card {
  display: grid;
  gap: 12px;
  text-align: left;
  padding: 24px;
  border: 1px solid rgba(22, 50, 79, 0.1);
  border-radius: 24px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.98), rgba(214, 240, 255, 0.72)),
    #fff;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.topic-card:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 111, 235, 0.25);
}

.topic-card strong {
  font-size: 1.45rem;
}

.topic-kicker {
  display: inline-flex;
  align-self: flex-start;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(22, 50, 79, 0.08);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.topic-card-active {
  background:
    linear-gradient(160deg, rgba(31, 111, 235, 0.16), rgba(255, 255, 255, 0.98)),
    #fff;
}

.topic-card-active .topic-kicker {
  background: rgba(22, 138, 75, 0.14);
  color: var(--success);
}

.topic-preview {
  margin-top: 20px;
}

.hero-topline {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.subtle-badge {
  background: rgba(22, 50, 79, 0.08);
  color: var(--text);
}

.sachkunde-layout {
  align-items: start;
}

.topic-stack {
  display: grid;
  gap: 10px;
  margin: 18px 0 24px;
}

.topic-select-btn {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  min-height: 52px;
  padding: 0 16px;
  border: 1px solid rgba(22, 50, 79, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
}

.topic-select-btn-active {
  border-color: rgba(31, 111, 235, 0.4);
  background: rgba(31, 111, 235, 0.1);
  color: var(--accent-dark);
}

.compact-card p:last-child {
  margin-bottom: 0;
}

.sachkunde-card {
  margin-top: 18px;
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(22, 50, 79, 0.08);
  box-shadow: var(--shadow);
}

.sachkunde-lesson {
  margin-bottom: 24px;
  padding: 18px;
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(31, 111, 235, 0.1), rgba(22, 138, 75, 0.08)),
    rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(22, 50, 79, 0.08);
}

.sachkunde-illustration-frame {
  margin: 0 0 18px;
  border-radius: 18px;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.9), transparent 35%),
    linear-gradient(135deg, rgba(31, 111, 235, 0.16), rgba(22, 138, 75, 0.12));
  border: 1px solid rgba(22, 50, 79, 0.08);
}

.sachkunde-illustration {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.option-btn {
  width: 100%;
  text-align: left;
  min-height: 56px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(22, 50, 79, 0.12);
  background: rgba(255, 255, 255, 0.95);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
}

.option-btn:hover {
  border-color: rgba(31, 111, 235, 0.28);
}

.option-btn.selected-option {
  border-color: rgba(31, 111, 235, 0.45);
  background: rgba(31, 111, 235, 0.12);
}

.option-btn.correct-option {
  border-color: rgba(22, 138, 75, 0.45);
  background: rgba(22, 138, 75, 0.1);
}

.option-btn.wrong-option {
  border-color: rgba(180, 35, 24, 0.35);
  background: rgba(180, 35, 24, 0.08);
}

.option-btn.neutral-option {
  opacity: 0.7;
}

.sachkunde-feedback {
  margin-top: 18px;
  padding: 18px;
  border-radius: 20px;
  background: rgba(31, 111, 235, 0.08);
  border: 1px solid rgba(31, 111, 235, 0.12);
}

.feedback-title {
  margin-bottom: 10px;
  font-size: 1.1rem;
  font-weight: 700;
}

.hero {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  color: var(--accent-dark);
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2.3rem, 5vw, 4.2rem);
  line-height: 0.96;
}

.hero-copy {
  max-width: 60ch;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-card,
.panel {
  backdrop-filter: blur(18px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(160deg, rgba(31, 111, 235, 0.12), rgba(255, 255, 255, 0.95)),
    var(--panel);
}

.badge {
  display: inline-flex;
  align-self: flex-start;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(31, 111, 235, 0.12);
  color: var(--accent-dark);
  font-weight: 700;
}

.skills {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.skills li {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(31, 111, 235, 0.08);
  font-weight: 700;
}

.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 20px;
}

.panel {
  padding: 24px;
}

.history-panel {
  min-width: 0;
}

.reward-panel {
  grid-column: 1 / -1;
}

.analytics-panel,
.overview-panel,
.version-panel {
  grid-column: 1 / -1;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.field span {
  font-weight: 700;
}

.section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.section-head.compact h3 {
  margin: 0 0 6px;
}

.section-copy {
  color: var(--muted);
  font-size: 0.92rem;
}

.lock-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(180, 35, 24, 0.1);
  color: var(--danger);
  font-weight: 700;
}

.lock-chip.unlocked {
  background: rgba(22, 138, 75, 0.12);
  color: var(--success);
}

.pin-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin: 16px 0 12px;
}

.field input {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(22, 50, 79, 0.15);
  background: rgba(255, 255, 255, 0.92);
}

.field select {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(22, 50, 79, 0.15);
  background: rgba(255, 255, 255, 0.92);
}

.inline-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.grade-settings {
  margin-bottom: 8px;
  padding: 14px;
  border-radius: 18px;
  background: rgba(31, 111, 235, 0.06);
  border: 1px solid rgba(31, 111, 235, 0.08);
}

.hint {
  color: var(--muted);
  font-size: 0.92rem;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 150ms ease, opacity 150ms ease, background 150ms ease;
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent), #4ca5ff);
  color: #fff;
  font-weight: 700;
}

.secondary-btn {
  background: rgba(22, 50, 79, 0.08);
  color: var(--text);
  font-weight: 700;
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:disabled,
.secondary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat {
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(22, 50, 79, 0.08);
}

.stat-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

.status-banner {
  margin: 18px 0;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(31, 111, 235, 0.09);
  color: var(--accent-dark);
  font-weight: 700;
}

.quiz-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.question-card {
  display: grid;
  gap: 10px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(22, 50, 79, 0.08);
}

.question-card.correct {
  border-color: rgba(22, 138, 75, 0.45);
  background: rgba(22, 138, 75, 0.08);
}

.question-card.wrong {
  border-color: rgba(180, 35, 24, 0.35);
  background: rgba(180, 35, 24, 0.06);
}

.question-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.question-label {
  font-weight: 700;
  font-size: 1.1rem;
}

.question-feedback {
  color: var(--muted);
  font-size: 0.92rem;
}

.question-input {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(22, 50, 79, 0.12);
  font-size: 1rem;
}

.written-sum,
.money-task {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(31, 111, 235, 0.06);
  border: 1px solid rgba(31, 111, 235, 0.08);
}

.written-sum {
  display: grid;
  gap: 6px;
  max-width: 180px;
  margin-left: auto;
  font-size: 1.1rem;
  font-variant-numeric: tabular-nums;
}

.written-kind {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.written-line {
  text-align: right;
  font-weight: 700;
}

.written-result-line {
  min-height: 10px;
  border-top: 2px solid rgba(22, 50, 79, 0.35);
}

.written-answer-row {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

.written-digit-input {
  width: 40px;
  min-height: 44px;
  padding: 0;
  border-radius: 12px;
  border: 1px solid rgba(22, 50, 79, 0.18);
  background: rgba(255, 255, 255, 0.95);
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.written-digit-input:focus {
  outline: 2px solid rgba(31, 111, 235, 0.35);
  border-color: var(--accent);
}

.money-task {
  font-weight: 700;
  font-size: 1.05rem;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.reward-actions {
  margin-top: 0;
  margin-bottom: 16px;
}

.reward-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.reward-stats {
  margin-bottom: 16px;
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(220px, 1fr));
  gap: 12px;
}

.analytics-card {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(22, 50, 79, 0.08);
}

.analytics-card h3 {
  margin: 0 0 12px;
}

.analytics-card p {
  margin-bottom: 8px;
}

.history-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.history-item {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(22, 50, 79, 0.08);
}

.history-main,
.history-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.history-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.empty-history {
  margin: 0;
  color: var(--muted);
}

.timer-pill {
  min-width: 96px;
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(22, 50, 79, 0.08);
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
}

.minutes-board {
  padding: 24px;
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(31, 111, 235, 0.15), rgba(22, 138, 75, 0.1)),
    rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(22, 50, 79, 0.08);
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 700;
}

.version-panel {
  grid-column: 1 / -1;
}

code {
  background: rgba(22, 50, 79, 0.08);
  padding: 2px 6px;
  border-radius: 8px;
}

@media (max-width: 920px) {
  .hero,
  .layout,
  .home-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid,
  .quiz-form,
  .analytics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100% - 20px, 1200px);
  }

  .panel,
  .hero-card,
  .gate-card {
    padding: 18px;
  }

  .stats-grid,
  .quiz-form,
  .reward-stats,
  .analytics-grid {
    grid-template-columns: 1fr;
  }

  .reward-header,
  .question-top,
  .actions,
  .history-main,
  .history-meta,
  .section-head,
  .hero-topline {
    flex-direction: column;
    align-items: stretch;
  }

  .timer-pill {
    width: 100%;
  }

  .pin-row,
  .inline-row {
    grid-template-columns: 1fr;
  }

  .history-item,
  .stat,
  .analytics-card,
  .minutes-board {
    padding: 14px;
  }

  .hero-copy,
  .section-copy,
  .question-feedback,
  .history-meta,
  .analytics-card p {
    font-size: 0.95rem;
  }

  .settings-panel,
  .progress-panel,
  .history-panel,
  .reward-panel,
  .analytics-panel,
  .version-panel {
    overflow: hidden;
  }

  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

  h1 {
    font-size: clamp(2rem, 10vw, 3rem);
  }
}