/* ===== CARD ===== */
.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gray-700);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ===== BUTTONS ===== */
.btn { padding: 0.55rem 1.1rem; border-radius: 8px; font-size: 0.875rem; font-weight: 600; cursor: pointer; border: none; transition: all 0.15s; display: inline-flex; align-items: center; gap: 0.4rem; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: white; border: 1.5px solid var(--gray-200); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.8rem; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* ===== STATS BAR ===== */
.stats-bar {
  display: flex;
  gap: 1.25rem;
  padding: 1rem;
  background: white;
  border-radius: 10px;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat .num { font-size: 1.5rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat .label { font-size: 0.7rem; color: var(--gray-500); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }

/* ===== YEAR GRID ===== */
.year-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(75px, 1fr));
  gap: 0.5rem;
}
.year-cell {
  text-align: center;
  padding: 0.75rem 0.25rem;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}
.year-cell:hover { border-color: var(--primary); background: #eff6ff; transform: translateY(-1px); }
.year-cell .y-num { font-size: 0.7rem; color: var(--gray-500); }
.year-cell .y-count { font-size: 1.4rem; font-weight: 800; color: var(--primary); line-height: 1.3; }
.year-cell:hover .y-count { color: var(--primary-dark); }

/* ===== TAGS ===== */
.tag-list { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--gray-200);
  background: var(--gray-50);
  color: var(--gray-700);
  transition: all 0.15s;
}
.tag:hover { border-color: var(--primary); color: var(--primary); background: #eff6ff; }
.tag.active { background: var(--primary); color: white; border-color: var(--primary); }

/* ===== BADGES ===== */
.badge { padding: 0.2rem 0.55rem; border-radius: 5px; font-size: 0.7rem; font-weight: 700; }
.badge-year { background: #dbeafe; color: #1e40af; }
.badge-type { background: #dcfce7; color: #166534; }
.badge-difficulty-basic { background: #dcfce7; color: #166534; }
.badge-difficulty-medium { background: #fef3c7; color: #92400e; }
.badge-difficulty-difficult { background: #fee2e2; color: #991b1b; }
.badge-group { background: #f3e8ff; color: #7c3aed; }
.badge-answer-yes { background: #d1fae5; color: #065f46; font-size: 0.68rem; }
.badge-answer-no { background: #f3f4f6; color: #6b7280; font-size: 0.68rem; }

/* ===== QUESTION CARD ===== */
.q-card {
  background: white;
  border: 1.5px solid var(--gray-200);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 0.6rem;
  cursor: pointer;
  transition: all 0.15s;
}
.q-card:hover { border-color: var(--primary); box-shadow: 0 2px 8px rgba(79,70,229,0.1); transform: translateY(-1px); }
.q-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; flex-wrap: wrap; gap: 0.4rem; }
.q-card-header .left { display: flex; gap: 0.4rem; flex-wrap: wrap; align-items: center; }
.q-card-qtext { font-size: 0.875rem; color: var(--gray-700); line-height: 1.5; margin-bottom: 0.5rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.q-card-footer { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.4rem; }
.q-card-concepts { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.concept-pill { padding: 0.15rem 0.5rem; border-radius: 4px; font-size: 0.68rem; background: var(--gray-100); color: var(--gray-600); font-weight: 500; }
.passage-indicator { display: flex; align-items: center; gap: 0.3rem; font-size: 0.75rem; color: #7c3aed; font-weight: 600; }

/* ===== FILTERS ===== */
.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.filter-group label { display: block; font-size: 0.75rem; color: var(--gray-500); margin-bottom: 0.25rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.filter-group select, .filter-group input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  font-size: 0.875rem;
  background: white;
  cursor: pointer;
  transition: border-color 0.15s;
}
.filter-group select:focus, .filter-group input:focus { outline: none; border-color: var(--primary); }

/* ===== PRACTICE OPTIONS ===== */
.options-list { display: flex; flex-direction: column; gap: 0.6rem; }
.option-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.8rem 1rem;
  border: 2px solid var(--gray-200);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 0.95rem;
  line-height: 1.5;
}
.option-item:hover:not(.locked) { border-color: var(--primary); background: #eff6ff; }
.option-item.selected { border-color: var(--primary); background: #dbeafe; }
.option-item.correct { border-color: var(--success); background: #dcfce7; }
.option-item.wrong { border-color: var(--danger); background: #fee2e2; }
.option-item.locked { cursor: default; }
.opt-label { font-weight: 800; min-width: 1.6rem; height: 1.6rem; display: flex; align-items: center; justify-content: center; border-radius: 6px; background: var(--gray-100); font-size: 0.85rem; flex-shrink: 0; }
.option-item.selected .opt-label { background: var(--primary); color: white; }
.option-item.correct .opt-label { background: var(--success); color: white; }
.option-item.wrong .opt-label { background: var(--danger); color: white; }

/* ===== ABOUT PAGE ===== */
.about-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0.75rem; }
.about-type-item { padding: 0.75rem; background: var(--gray-50); border-radius: 8px; border: 1.5px solid var(--gray-200); }
.about-type-item .at-name { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.2rem; }
.about-type-item .at-count { font-size: 1.5rem; font-weight: 800; color: var(--primary); }
.about-type-item .at-desc { font-size: 0.75rem; color: var(--gray-500); margin-top: 0.2rem; }
.concept-table { width: 100%; border-collapse: collapse; }
.concept-table th { text-align: left; padding: 0.5rem 0.75rem; background: var(--gray-100); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--gray-500); border-bottom: 2px solid var(--gray-200); }
.concept-table td { padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--gray-100); font-size: 0.875rem; }
.concept-table tr:hover td { background: #f8fafc; }

/* ===== MOBILE ===== */
@media (max-width: 640px) {
  .container { padding: 1rem 0.75rem; }
  .stats-bar { gap: 0.75rem; }
  .stat .num { font-size: 1.25rem; }
  .filters-grid { grid-template-columns: repeat(2, 1fr); }
  .year-grid { grid-template-columns: repeat(4, 1fr); }
  header h1 { font-size: 1rem; }
  .mode-toggle { display: none; }
}