/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #f1f5f9;
  color: #1e293b;
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== Top Bar ===== */
.top-bar {
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.top-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: #2563eb;
}

.logo-sub {
  font-weight: 400;
  color: #64748b;
  font-size: 0.9rem;
}

.lang-selector {
  display: flex;
  gap: 6px;
}

.lang-btn {
  padding: 6px 16px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  background: #ffffff;
  color: #475569;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn:hover {
  border-color: #2563eb;
  color: #2563eb;
}

.lang-btn.active {
  background: #2563eb;
  color: #ffffff;
  border-color: #2563eb;
}

/* ===== Filter Bar ===== */
.filter-bar {
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
}

.filter-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-bar label {
  font-size: 0.875rem;
  font-weight: 500;
  color: #475569;
}

.filter-bar select {
  padding: 6px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 0.875rem;
  color: #334155;
  background: #ffffff;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
}

.filter-bar select:focus {
  border-color: #2563eb;
}

.quote-count {
  font-size: 0.8rem;
  color: #94a3b8;
  margin-left: auto;
}

/* ===== Grid ===== */
.grid-container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ===== Quote Card ===== */
.quote-card {
  background: #ffffff;
  border-radius: 10px;
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex;
  flex-direction: column;
  border: 1px solid #e2e8f0;
}

.quote-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.12);
  border-color: #bfdbfe;
}

.card-text {
  font-size: 0.95rem;
  color: #334155;
  line-height: 1.65;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid #f1f5f9;
  padding-top: 12px;
  gap: 8px;
}

.card-speaker {
  font-weight: 600;
  font-size: 0.85rem;
  color: #1e293b;
}

.card-function {
  font-size: 0.75rem;
  color: #2563eb;
  background: #eff6ff;
  padding: 2px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ===== Loading / Empty ===== */
.loading {
  text-align: center;
  padding: 60px 24px;
  color: #94a3b8;
  font-size: 1rem;
}

.empty-state {
  text-align: center;
  padding: 60px 24px;
  color: #94a3b8;
  font-size: 1rem;
}

/* ===== Modal Overlay ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: flex-start;
  padding: 40px 16px;
  overflow-y: auto;
}

.modal-overlay.open {
  display: flex;
}

/* ===== Modal ===== */
.modal {
  background: #ffffff;
  border-radius: 14px;
  max-width: 680px;
  width: 100%;
  padding: 32px;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  animation: modalIn 0.25s ease;
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.modal-close:hover {
  color: #1e293b;
}

/* Modal Label (shared) */
.modal-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94a3b8;
  margin-bottom: 6px;
  font-weight: 600;
}

/* ===== Flip Card ===== */
.flip-card {
  perspective: 1200px;
  margin-bottom: 24px;
  cursor: pointer;
}

.flip-card-inner {
  position: relative;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.flip-card-inner.flipped {
  transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
  backface-visibility: hidden;
  border-radius: 10px;
  padding: 20px;
}

.flip-card-front {
  background: #ffffff;
  border: 1px solid #e2e8f0;
}

.flip-card-back {
  background: #f8fafc;
  border: 1px solid #dbeafe;
  position: absolute;
  inset: 0;
  transform: rotateY(180deg);
  overflow-y: auto;
}

.modal-text-en {
  font-size: 1rem;
  color: #1e293b;
  line-height: 1.7;
  border-left: 3px solid #2563eb;
  padding-left: 14px;
}

.modal-text-trans {
  font-size: 1rem;
  color: #334155;
  line-height: 1.7;
  border-left: 3px solid #60a5fa;
  padding-left: 14px;
}

.flip-hint {
  display: block;
  margin-top: 12px;
  font-size: 0.75rem;
  color: #94a3b8;
  text-align: right;
}

/* Meta */
.modal-meta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.modal-speaker-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-speaker {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1e293b;
}

/* Badges */
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}

.badge-function {
  background: #eff6ff;
  color: #2563eb;
}

.badge-difficulty {
  background: #f0fdf4;
  color: #16a34a;
}

/* Tags */
.modal-tags-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  flex-wrap: wrap;
}

.modal-label-sm {
  font-size: 0.75rem;
  color: #94a3b8;
  font-weight: 600;
  min-width: 80px;
  padding-top: 3px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 0.72rem;
  background: #f1f5f9;
  color: #475569;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid #e2e8f0;
}

/* Detail row */
.modal-detail-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-timestamp {
  font-size: 0.8rem;
  color: #94a3b8;
}

/* Context */
.modal-context {
  margin-bottom: 20px;
}

.context-toggle {
  background: none;
  border: none;
  font-size: 0.85rem;
  color: #2563eb;
  cursor: pointer;
  font-weight: 500;
  padding: 0;
  transition: color 0.2s;
}

.context-toggle:hover {
  color: #1d4ed8;
}

.context-text {
  display: none;
  margin-top: 8px;
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.65;
  background: #f8fafc;
  padding: 14px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}

.context-text.open {
  display: block;
}

/* Listen Button */
.listen-btn {
  display: inline-block;
  background: #2563eb;
  color: #ffffff;
  text-decoration: none;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.2s;
  text-align: center;
}

.listen-btn:hover {
  background: #1d4ed8;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .grid-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .top-bar-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid-container {
    grid-template-columns: 1fr;
    padding: 0 16px;
    margin: 16px auto;
    gap: 14px;
  }

  .quote-card {
    padding: 18px;
  }

  .modal {
    padding: 24px 18px;
  }

  .modal-overlay {
    padding: 20px 10px;
  }

  .filter-bar-inner {
    padding: 12px 16px;
  }
}