:root {
  --qibmauz-green: #0f6b4f;
  --qibmauz-green-dark: #094735;
  --qibmauz-gold: #d4a72c;
  --qibmauz-ink: #18211f;
  --qibmauz-muted: #65726e;
  --qibmauz-bg: #f6f8f7;
  --qibmauz-line: #dfe7e3;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  padding-bottom: 78px;
  background: var(--qibmauz-bg);
  color: var(--qibmauz-ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.app-main {
  max-width: 980px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--qibmauz-ink);
}

.brand-mark small {
  display: block;
  color: var(--qibmauz-muted);
  font-size: 0.72rem;
  line-height: 1;
}

.brand-logo {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 8px;
  background: var(--qibmauz-green);
  color: #fff;
  font-weight: 800;
}

.bottom-nav {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1030;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  min-height: 68px;
}

.bottom-nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: #5d6a66;
  font-size: 0.76rem;
  text-decoration: none;
}

.bottom-nav-link.active {
  color: var(--qibmauz-green);
  font-weight: 700;
}

.nav-icon {
  font-size: 1.18rem;
  line-height: 1;
}

.panel {
  border: 1px solid var(--qibmauz-line);
  border-radius: 8px;
  background: #fff;
}

.action-tile {
  display: block;
  height: 100%;
  padding: 16px;
  border: 1px solid var(--qibmauz-line);
  border-radius: 8px;
  background: #fff;
  color: inherit;
  text-decoration: none;
}

.action-tile:hover,
.action-tile:focus {
  border-color: var(--qibmauz-green);
  box-shadow: 0 8px 20px rgba(15, 107, 79, 0.08);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.stat-card {
  padding: 14px;
  border: 1px solid var(--qibmauz-line);
  border-radius: 8px;
  background: #fff;
}

.stat-card strong {
  display: block;
  font-size: 1.45rem;
  color: var(--qibmauz-green-dark);
}

.question-option {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--qibmauz-line);
  border-radius: 8px;
  background: #fff;
  text-align: left;
}

.question-option.selected {
  border-color: var(--qibmauz-green);
  background: #edf8f4;
}

.question-option.correct {
  border-color: #198754;
  background: #e9f7ef;
}

.question-option.wrong {
  border-color: #dc3545;
  background: #fbeaec;
}

.passage-box {
  max-height: 260px;
  overflow: auto;
  border-left: 4px solid var(--qibmauz-gold);
  background: #fffaf0;
}

.navigator-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.navigator-grid .btn {
  aspect-ratio: 1;
  padding: 0;
}

.timer-chip {
  min-width: 96px;
  border-radius: 999px;
  background: var(--qibmauz-green-dark);
  color: #fff;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.topic-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
}

.offline-body {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 20px;
  background: var(--qibmauz-bg);
}

.offline-panel {
  max-width: 430px;
  padding: 26px;
  border: 1px solid var(--qibmauz-line);
  border-radius: 8px;
  background: #fff;
  text-align: center;
}

.offline-link {
  color: var(--qibmauz-green);
  font-weight: 700;
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }

  .bottom-nav {
    top: 74px;
    right: auto;
    bottom: 0;
    width: 92px;
    grid-template-columns: 1fr;
    grid-auto-rows: 74px;
    align-content: start;
    border-right: 1px solid var(--qibmauz-line);
  }

  .app-main {
    margin-left: 100px;
  }

  .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.dashboard-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.analytics-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
}

.analytics-row:last-child {
  border-bottom: 0 !important;
  padding-bottom: 0 !important;
}

.analytics-progress {
  height: 8px;
}

.analytics-percent {
  min-width: 48px;
  text-align: right;
  color: var(--qibmauz-green-dark);
  font-variant-numeric: tabular-nums;
}

.trend-chart {
  display: grid;
  grid-template-columns: repeat(7, minmax(28px, 1fr));
  gap: 10px;
  align-items: end;
  min-height: 160px;
}

.trend-bar-wrap {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 8px;
  height: 150px;
  color: var(--qibmauz-muted);
  font-size: 0.76rem;
  text-align: center;
}

.trend-bar {
  align-self: end;
  min-height: 6px;
  border-radius: 8px 8px 2px 2px;
  background: linear-gradient(180deg, var(--qibmauz-green), var(--qibmauz-green-dark));
}

.recommendation-list {
  padding-left: 1.1rem;
}

.recommendation-list li + li {
  margin-top: 8px;
}

@media (min-width: 768px) {
  .dashboard-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}