/* ══════════════════════════════════════════════════════════════
   notes-panel.css — Smart Study Hub · Google Drive Notes Panel
   All classes are scoped to .notes-* and .nm-* to avoid any
   conflict with .modal-overlay (Theme Gallery drawer in themes.css)
   ══════════════════════════════════════════════════════════════ */

/* ── Container ── */
.notes-container {
  padding: 0.5rem 0 2rem;
}

/* ── Meta bar (file count + refresh button) ── */
.notes-meta-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.notes-count-badge {
  background: rgba(99, 130, 255, 0.15);
  border: 1px solid rgba(99, 130, 255, 0.35);
  color: var(--accent1, #6382ff);
  border-radius: 20px;
  padding: 0.2rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.notes-refresh-btn {
  background: transparent;
  border: 1px solid var(--border, rgba(99, 130, 255, 0.15));
  color: var(--text-muted, #8892aa);
  border-radius: 8px;
  padding: 0.2rem 0.7rem;
  font-size: 0.76rem;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.notes-refresh-btn:hover {
  background: var(--card2, #1a2440);
  color: var(--text, #e2e8f0);
  border-color: var(--accent1, #6382ff);
}

/* ── Unit group ── */
.notes-unit-group {
  margin-bottom: 2.2rem;
}

.notes-unit-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border, rgba(99, 130, 255, 0.15));
}

.notes-unit-name {
  font-family: var(--font-alt, 'Outfit', sans-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text, #e2e8f0);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.notes-unit-count {
  font-size: 0.72rem;
  color: var(--text-muted, #8892aa);
  background: var(--card2, #1a2440);
  border: 1px solid var(--border, rgba(99, 130, 255, 0.15));
  border-radius: 20px;
  padding: 0.15rem 0.65rem;
}

/* ── Notes Grid ── */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

@media (max-width: 900px) {
  .notes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .notes-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Note Card ── */
.notes-card {
  background: var(--card, #141c30);
  border: 1px solid var(--border, rgba(99, 130, 255, 0.15));
  border-radius: var(--radius, 14px);
  padding: 1.15rem 1.1rem 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  position: relative;
  overflow: hidden;
}

.notes-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(99, 130, 255, 0.04) 0%,
    transparent 60%);
  pointer-events: none;
  border-radius: inherit;
}

.notes-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(99, 130, 255, 0.2);
  border-color: rgba(99, 130, 255, 0.3);
}

.notes-card-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.notes-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.notes-card-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text, #e2e8f0);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.notes-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.notes-type-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
  text-transform: uppercase;
}

.badge-pdf {
  background: rgba(239, 68, 68, 0.18);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-ppt {
  background: rgba(245, 158, 11, 0.18);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.notes-size {
  font-size: 0.68rem;
  color: var(--text-muted, #8892aa);
}

/* ── Card Action Buttons ── */
.notes-card-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.notes-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.16s ease, border-color 0.16s ease, transform 0.14s ease, color 0.16s ease;
  white-space: nowrap;
}

.notes-btn:hover {
  transform: translateY(-1px);
}

.notes-btn-preview {
  background: rgba(99, 130, 255, 0.15);
  border-color: rgba(99, 130, 255, 0.35);
  color: var(--accent1, #6382ff);
}

.notes-btn-preview:hover {
  background: rgba(99, 130, 255, 0.25);
  border-color: rgba(99, 130, 255, 0.6);
}

.notes-btn-download {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--success, #10b981);
}

.notes-btn-download:hover {
  background: rgba(16, 185, 129, 0.22);
  border-color: rgba(16, 185, 129, 0.55);
}

.notes-btn-drive {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--accent4, #f59e0b);
}

.notes-btn-drive:hover {
  background: rgba(245, 158, 11, 0.22);
  border-color: rgba(245, 158, 11, 0.55);
}

.notes-btn-close {
  background: rgba(148, 163, 184, 0.1);
  border-color: rgba(148, 163, 184, 0.25);
  color: var(--text-muted, #8892aa);
}

.notes-btn-close:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.35);
  color: #f87171;
}

/* ── State Cards (loading, error, empty, not-found) ── */
.notes-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  padding: 3rem 1.5rem;
  background: var(--card, #141c30);
  border: 1px dashed var(--border, rgba(99, 130, 255, 0.15));
  border-radius: var(--radius, 14px);
  text-align: center;
  color: var(--text-muted, #8892aa);
}

.notes-state-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.notes-state-msg {
  font-size: 0.92rem;
  line-height: 1.6;
  max-width: 340px;
}

.notes-state-msg strong {
  color: var(--text, #e2e8f0);
}

/* ── Spinner ── */
.notes-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--border, rgba(99, 130, 255, 0.15));
  border-top-color: var(--accent1, #6382ff);
  border-radius: 50%;
  animation: notes-spin 0.7s linear infinite;
}

@keyframes notes-spin {
  to { transform: rotate(360deg); }
}

/* ════════════════════════════════════════════════════════════
   NOTES PREVIEW MODAL
   Uses .notes-modal-* classes (NOT .modal-overlay) to avoid
   any conflict with the Theme Gallery drawer in themes.css.
════════════════════════════════════════════════════════════ */
.notes-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 12000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.notes-modal-overlay.nm-open {
  opacity: 1;
  pointer-events: auto;
}

.notes-modal-overlay.nm-open .notes-modal-card {
  transform: translateY(0) scale(1);
}

.notes-modal-card {
  background: var(--bg2, #0f1525);
  border: 1px solid var(--border, rgba(99, 130, 255, 0.2));
  border-radius: 18px;
  width: min(820px, 95vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(99, 130, 255, 0.08);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

/* Modal Header */
.notes-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem 0.85rem;
  border-bottom: 1px solid var(--border, rgba(99, 130, 255, 0.12));
  gap: 0.75rem;
  flex-shrink: 0;
}

.nm-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  overflow: hidden;
}

.nm-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.nm-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text, #e2e8f0);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nm-close-btn {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #f87171;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.16s ease, border-color 0.16s ease;
}

.nm-close-btn:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: rgba(239, 68, 68, 0.5);
}

/* Modal Body */
.notes-modal-body {
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.nm-iframe {
  width: 100%;
  height: 100%;
  min-height: 420px;
  border: none;
  display: block;
  background: #0a0e1a;
}

/* Modal Footer */
.notes-modal-footer {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--border, rgba(99, 130, 255, 0.12));
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ── Responsive modal ── */
@media (max-width: 540px) {
  .notes-modal-card {
    border-radius: 14px;
  }
  .notes-modal-footer {
    flex-direction: column;
    align-items: stretch;
  }
  .notes-btn {
    justify-content: center;
  }
}

/* ══════════════════════════════════════════════════════════════
   PYQ VAULT & TIERED ARCHITECTURE STYLES
   ══════════════════════════════════════════════════════════════ */
.pyq-tier {
  margin-top: 1.5rem;
}

.pyq-tier-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.pyq-tier-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.pyq-tier-icon {
  font-size: 1.35rem;
  line-height: 1;
}

.pyq-tier-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text, #f1f5f9);
  margin: 0;
  font-family: var(--font-alt, inherit);
  letter-spacing: -0.01em;
}

.pyq-tier-badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: rgba(99, 130, 255, 0.12);
  color: var(--accent1, #818cf8);
  border: 1px solid rgba(99, 130, 255, 0.25);
  letter-spacing: 0.02em;
}

.pyq-tier-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border, rgba(255, 255, 255, 0.1)), transparent);
  margin: 3rem 0 2rem;
}

/* Vault Grid */
.pyq-vault-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.pyq-vault-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem;
  background: linear-gradient(145deg, var(--card2, #181926), rgba(99, 130, 255, 0.03));
  border: 1px solid var(--border, rgba(255, 255, 255, 0.1));
  border-radius: var(--radius, 12px);
  color: var(--text, #f1f5f9);
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.pyq-vault-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 130, 255, 0.35);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.25);
}

.pyq-vault-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.pyq-vault-icon-badge {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.pyq-vault-icon {
  font-size: 1.3rem;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(99, 130, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(99, 130, 255, 0.15);
  flex-shrink: 0;
}

.pyq-vault-badges {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.pyq-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  letter-spacing: 0.03em;
  display: inline-block;
}

.tag-endsem {
  background: rgba(139, 92, 246, 0.18);
  color: #c4b5fd;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.tag-ct {
  background: rgba(16, 185, 129, 0.18);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag-model {
  background: rgba(245, 158, 11, 0.18);
  color: #fcd34d;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.tag-other {
  background: rgba(100, 116, 139, 0.2);
  color: #cbd5e1;
  border: 1px solid rgba(100, 116, 139, 0.3);
}

.tag-fmt {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted, #94a3b8);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.pyq-vault-card-body {
  margin-bottom: 1.1rem;
}

.pyq-vault-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text, #f1f5f9);
  margin: 0 0 0.35rem 0;
  line-height: 1.4;
  word-break: break-word;
}

.pyq-vault-meta {
  font-size: 0.82rem;
  color: var(--text-muted, #94a3b8);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pyq-vault-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: auto;
}

.pyq-vault-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.pyq-vault-btn-preview {
  background: rgba(99, 130, 255, 0.12);
  color: var(--accent1, #818cf8);
  border-color: rgba(99, 130, 255, 0.25);
}

.pyq-vault-btn-preview:hover {
  background: rgba(99, 130, 255, 0.22);
  border-color: rgba(99, 130, 255, 0.4);
  color: #fff;
}

.pyq-vault-btn-download {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted, #94a3b8);
  border-color: rgba(255, 255, 255, 0.1);
}

.pyq-vault-btn-download:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text, #fff);
  border-color: rgba(255, 255, 255, 0.2);
}

.pyq-empty-state, .pyq-loading-state {
  padding: 2.5rem 1.5rem;
  text-align: center;
  border-radius: var(--radius, 12px);
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed var(--border, rgba(255, 255, 255, 0.1));
  color: var(--text-muted, #94a3b8);
  font-size: 0.92rem;
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.pyq-pending-banner {
  padding: 1.1rem 1.4rem;
  border-radius: 12px;
  background: rgba(99, 130, 255, 0.06);
  border: 1px solid rgba(99, 130, 255, 0.15);
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}