.exam-countdown-ui {
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-accent: #06b6d4;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-bg-card: rgba(255, 255, 255, 0.85);
  --color-border: #e2e8f0;
  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-bg-input: #fff;
  --color-bg-row-study: #fff;
  --color-white: #fff;
  --color-bg-row-rest: #f8fafc;
  --color-bg-row-review: #eff6ff;
  --color-bg-row-exam: #f0fdf4;
  --shadow-main: rgba(0, 0, 0, 0.05);
}

.theme-dark .exam-countdown-ui {
  --color-bg-card: #1e1e2e;
  --color-border: #313244;
  --color-text-main: #cdd6f4;
  --color-text-muted: #a6adc8;
  --color-bg-input: #11111b;
  --color-bg-row-study: #181825;
  --color-bg-row-rest: #11111b;
  --color-bg-row-review: #1e1e2e;
  --color-bg-row-exam: #313244;
  --shadow-main: rgba(0, 0, 0, 0.3);
}

.exam-countdown-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 2rem;
  background: var(--color-bg-card);
  border-radius: 1.5rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px var(--shadow-main);
  transition: all 0.3s ease;
}

.config-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.config-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.config-section:last-child {
  border-bottom: none;
}

.section-title {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  margin: 0;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

.input-control {
  padding: 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-input);
  color: var(--color-text-main);
  font-size: 1rem;
  transition: border-color 0.2s ease;
}

.input-control:focus {
  outline: none;
  border-color: var(--color-primary);
}

.weekly-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.25rem;
}

.weekly-day-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
}

.weekly-day-label input {
  display: none;
}

.day-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 35px;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: all 0.2s ease;
}

.weekly-day-label input:checked + .day-badge {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.exclusion-input-row {
  display: flex;
  gap: 0.5rem;
}

.btn-secondary {
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-input);
  color: var(--color-text-main);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--color-border);
}

.btn-primary {
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: none;
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-reset {
  width: 100%;
}

.exclusions-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.no-exclusions {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.exclusion-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.5rem;
  background: var(--color-border);
  border-radius: 0.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.remove-exclusion-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-error);
  cursor: pointer;
  display: flex;
  align-items: center;
}

.results-area {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.stat-card {
  position: relative;
  padding: 1.5rem 1.25rem;
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px var(--shadow-main);
}

.stat-card.pace-card {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  border: none;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
}

.pace-icon-wrapper {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  padding: 1rem;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pace-content {
  display: flex;
  flex-direction: column;
}

.stat-icon-wrapper {
  padding: 0.75rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}

.icon-calendar {
  background: rgba(6, 182, 212, 0.1);
  color: var(--color-accent);
}

.icon-book {
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-primary);
}

.icon-shield {
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
  text-align: center;
}

.pace-card .stat-label {
  color: rgba(255, 255, 255, 0.8);
  text-align: left;
  margin-bottom: 0.15rem;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.2;
}

.pace-card .stat-value {
  font-size: 3rem;
  color: var(--color-white);
  line-height: 1;
}

.pace-unit {
  font-size: 0.95rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.error-banner {
  padding: 1rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-error);
  border-radius: 0.75rem;
  color: var(--color-error);
  font-weight: 600;
  font-size: 0.9rem;
}

.schedule-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.schedule-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.schedule-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin: 0;
}

.schedule-table-container {
  overflow-x: auto;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.schedule-table th,
.schedule-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.schedule-table th {
  background: var(--color-bg-input);
  font-weight: 700;
  color: var(--color-text-muted);
}

.schedule-row {
  transition: background-color 0.2s ease;
}

.row-study {
  background-color: var(--color-bg-row-study);
}

.row-rest {
  background-color: var(--color-bg-row-rest);
  opacity: 0.7;
}

.row-review {
  background-color: var(--color-bg-row-review);
}

.row-exam {
  background-color: var(--color-bg-row-exam);
  font-weight: 700;
}

.type-pill {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.pill-study {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary);
}

.pill-rest {
  background: rgba(100, 116, 139, 0.15);
  color: var(--color-text-muted);
}

.pill-review {
  background: rgba(6, 182, 212, 0.15);
  color: var(--color-accent);
}

.pill-exam {
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-success);
}

.cell-target {
  font-weight: 600;
}

.toggle-day-btn {
  padding: 0.35rem 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-input);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.toggle-day-btn.btn-rest {
  color: var(--color-error);
  border-color: rgba(239, 68, 68, 0.3);
}

.toggle-day-btn.btn-rest:hover {
  background: rgba(239, 68, 68, 0.05);
}

.toggle-day-btn.btn-study {
  color: var(--color-success);
  border-color: rgba(16, 185, 129, 0.3);
}

.toggle-day-btn.btn-study:hover {
  background: rgba(16, 185, 129, 0.05);
}

.weekly-rest-indicator {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.empty-schedule-cell {
  text-align: center;
  padding: 2rem;
  color: var(--color-text-muted);
  font-style: italic;
}

@media (max-width: 900px) {
  .exam-countdown-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-card.pace-card {
    grid-column: span 1;
  }
}