/* ============================================================
   ExamStash Global Styles — UX Components (Search, PDF Modal, Bookmarks)
   ============================================================ */

/* Header Action Buttons */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1.5px solid #e2e8f0;
  background: #ffffff;
  color: #475569;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.2s ease;
  position: relative;
  text-decoration: none;
}

.header-btn:hover {
  border-color: #0d9488;
  color: #0d9488;
  transform: translateY(-1px);
}

.badge-count {
  position: absolute;
  top: -4px;
  right: -4px;
  background: #0d9488;
  color: white;
  font-size: 10px;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 10px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  border: 2px solid #ffffff;
}

/* Secondary & Bookmark Buttons */
.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  color: #0f172a;
  border: 1.5px solid #e2e8f0;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  border-color: #0d9488;
  color: #0d9488;
}

.bookmark-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid #e2e8f0;
  background: #ffffff;
  color: #475569;
  transition: all 0.2s;
}

.bookmark-btn:hover {
  border-color: #0d9488;
  color: #0d9488;
}

.bookmark-btn.saved {
  background: #f0fdfa;
  color: #0d9488;
  border-color: #0d9488;
}

/* Share with Classmates Box */
.share-box {
  border: 1.5px solid #f0f0f0;
  border-radius: 16px;
  padding: 20px 24px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: #ffffff;
}

.share-info h3 {
  font-size: 15px;
  font-weight: 700;
  color: #0f0f0f;
  margin-bottom: 3px;
}

.share-info p {
  font-size: 13px;
  color: #666666;
}

.share-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-share {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.btn-share-wa {
  background: #25D366;
  color: #ffffff;
  border: none;
}

.btn-share-wa:hover {
  background: #20bd5a;
  color: #ffffff;
}

.btn-share-tg {
  background: #0088cc;
  color: #ffffff;
  border: none;
}

.btn-share-tg:hover {
  background: #0077b5;
  color: #ffffff;
}

.btn-share-copy {
  background: #ffffff;
  color: #475569;
  border: 1.5px solid #e2e8f0;
}

.btn-share-copy:hover {
  border-color: #0d9488;
  color: #0d9488;
}

@media (max-width: 768px) {
  .share-box {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding: 16px 18px;
  }
  .share-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .btn-share-copy {
    grid-column: span 2;
  }
}

/* ============================================================
   SEARCH AUTOCOMPLETE DROPDOWN
   ============================================================ */
.search-wrapper-relative {
  position: relative;
  width: 100%;
  max-width: 620px;
  margin: 0 auto;
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #ffffff;
  border: 1.5px solid #e2e8f0;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  max-height: 380px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
  text-align: left;
}

.search-dropdown.active {
  display: block;
}

.search-category-group {
  padding: 8px 0;
  border-bottom: 1px solid #f1f5f9;
}

.search-category-group:last-child {
  border-bottom: none;
}

.search-category-header {
  padding: 6px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #64748b;
}

.search-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  text-decoration: none;
  color: #0f172a;
  transition: background 0.15s ease;
  cursor: pointer;
}

.search-item:hover, .search-item.focused {
  background: #f0fdfa;
  color: #0d9488;
}

.search-item-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.search-item-info {
  flex: 1;
  min-width: 0;
}

.search-item-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-item-subtitle {
  font-size: 12px;
  color: #64748b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-no-results {
  padding: 24px;
  text-align: center;
  color: #64748b;
  font-size: 14px;
}

/* ============================================================
   BOOKMARKS / SAVED PAPERS DRAWER
   ============================================================ */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  z-index: 9998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer-panel {
  position: fixed;
  top: 0;
  right: -420px;
  width: 100%;
  max-width: 400px;
  height: 100vh;
  background: #ffffff;
  box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.drawer-panel.open {
  right: 0;
}

.drawer-header {
  padding: 20px 24px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 8px;
}

.drawer-close {
  background: transparent;
  border: none;
  color: #64748b;
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}

.drawer-close:hover {
  color: #0d9488;
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}

.bookmark-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
  margin-bottom: 10px;
  gap: 12px;
  transition: border-color 0.2s;
}

.bookmark-card:hover {
  border-color: #0d9488;
}

.bookmark-card a {
  text-decoration: none;
  color: #0f172a;
  font-size: 13px;
  font-weight: 600;
  flex: 1;
}

.bookmark-remove-btn {
  background: transparent;
  border: none;
  color: #64748b;
  cursor: pointer;
  font-size: 16px;
  padding: 4px;
  transition: color 0.15s;
}

.bookmark-remove-btn:hover {
  color: #ef4444;
}

.bookmarks-empty {
  text-align: center;
  padding: 48px 20px;
  color: #64748b;
}

.bookmarks-empty-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.drawer-footer {
  padding: 16px 24px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-clear-all {
  background: transparent;
  border: none;
  color: #ef4444;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.btn-clear-all:hover {
  text-decoration: underline;
}

/* ============================================================
   IN-BROWSER PDF PREVIEW MODAL
   ============================================================ */
.pdf-modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 10000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

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

.pdf-modal-container {
  background: #ffffff;
  width: 100%;
  max-width: 960px;
  height: 90vh;
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalScaleIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScaleIn {
  from { transform: scale(0.96); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.pdf-modal-header {
  padding: 14px 20px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
}

.pdf-modal-title {
  font-size: 15px;
  font-weight: 700;
  color: #0f172a;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60%;
}

.pdf-modal-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid #e2e8f0;
  background: #ffffff;
  color: #0f172a;
  transition: all 0.15s ease;
}

.pdf-btn-primary {
  background: #0d9488;
  color: white;
  border-color: #0d9488;
}

.pdf-btn-primary:hover {
  background: #0f766e;
}

.pdf-btn:hover {
  border-color: #0d9488;
}

.pdf-modal-body {
  flex: 1;
  position: relative;
  background: #2b2b2b;
}

.pdf-modal-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ============================================================
   MOBILE STICKY BOTTOM NAVIGATION BAR
   ============================================================ */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-top: 1px solid #e2e8f0;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.04);
  z-index: 9990;
  align-items: center;
  justify-content: space-around;
  padding: 0 4px;
}

.mobile-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: #64748b;
  text-decoration: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 0;
  font-size: 11px;
  font-weight: 600;
  transition: color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.mobile-nav-item:hover, .mobile-nav-item.active {
  color: #0d9488;
}

.mobile-nav-icon {
  font-size: 18px;
  line-height: 1;
}

.mobile-nav-label {
  font-size: 10px;
  letter-spacing: 0.02em;
}

@media (max-width: 768px) {
  .mobile-bottom-nav {
    display: flex;
  }
  body {
    padding-bottom: 68px !important;
  }
}

/* ============================================================
   PWA INSTALL PROMPT BANNER
   ============================================================ */
.pwa-install-banner {
  position: fixed;
  bottom: 70px;
  left: 16px;
  right: 16px;
  max-width: 440px;
  margin: 0 auto;
  background: #ffffff;
  border: 1.5px solid #0d9488;
  border-radius: 14px;
  padding: 12px 16px;
  box-shadow: 0 10px 25px rgba(13, 148, 136, 0.15);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 9995;
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
  from { transform: translateY(30px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.pwa-banner-icon {
  flex-shrink: 0;
}

.pwa-banner-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.pwa-banner-text strong {
  font-size: 14px;
  color: #0f172a;
}

.pwa-banner-text span {
  font-size: 11px;
  color: #64748b;
  line-height: 1.3;
}

.pwa-banner-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-pwa-install {
  background: #0d9488;
  color: white;
  border: none;
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-pwa-install:hover {
  background: #0f766e;
}

.btn-pwa-dismiss {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 20px;
  cursor: pointer;
  padding: 2px 6px;
  line-height: 1;
}

.btn-pwa-dismiss:hover {
  color: #475569;
}

/* ============================================================
   REQUEST A PAPER MODAL (ExamStash Native Theme)
   ============================================================ */
.request-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(5px);
  z-index: 10001;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

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

.request-modal-container {
  background: #ffffff;
  width: 100%;
  max-width: 520px;
  border-radius: 20px;
  border: 1.5px solid #f0f0f0;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  animation: modalScaleIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.request-modal-header {
  padding: 24px 28px 18px;
  border-bottom: 1px solid #f0f0f0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  background: #ffffff;
}

.req-tag {
  display: inline-block;
  background: #f0fdfa;
  color: #0d9488;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.req-title {
  font-size: 22px;
  font-weight: 800;
  color: #0f0f0f;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 4px;
}

.req-title span {
  color: #0d9488;
}

.req-desc {
  font-size: 13px;
  color: #666;
  line-height: 1.4;
}

.request-modal-close {
  background: #f5f5f5;
  border: 1px solid #e8e8e8;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 20px;
  color: #888;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: all 0.15s;
  flex-shrink: 0;
  margin-left: 12px;
}

.request-modal-close:hover {
  background: #f0fdfa;
  border-color: #0d9488;
  color: #0d9488;
}

.request-modal-body {
  padding: 22px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  max-height: 75vh;
  background: #ffffff;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: #1a1a1a;
}

.required-star {
  color: #ea580c;
  font-weight: 700;
}

.form-group input, .form-group textarea {
  background: #f5f5f5;
  border: 1.5px solid #e8e8e8;
  border-radius: 12px;
  font-size: 14px;
  color: #1a1a1a;
  padding: 10px 14px;
  outline: none;
  font-family: inherit;
  transition: all 0.2s;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: #0d9488;
  background: #ffffff;
}

.form-group input::placeholder, .form-group textarea::placeholder {
  color: #999;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 480px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.request-contrib-tip {
  background: #f0fdfa;
  border: 1.5px solid #ccfbf1;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 12px;
  color: #0d9488;
  line-height: 1.5;
}

.request-contrib-tip strong {
  color: #0f766e;
}

.request-modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
  flex-wrap: wrap;
}

.btn-dispatch-telegram {
  flex: 1.2;
  min-width: 150px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #0088cc;
  color: #ffffff;
  border: none;
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  font-family: inherit;
}

.btn-dispatch-telegram:hover {
  background: #0077b5;
}

.btn-dispatch-email {
  flex: 1.2;
  min-width: 140px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #0d9488;
  color: #ffffff;
  border: none;
  padding: 12px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  font-family: inherit;
}

.btn-dispatch-email:hover {
  background: #0f766e;
}

.btn-dispatch-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: #ffffff;
  color: #555555;
  border: 1.5px solid #e8e8e8;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.btn-dispatch-copy:hover {
  border-color: #0d9488;
  color: #0d9488;
}

.request-feedback {
  display: none;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  padding: 6px 0;
}

/* Header button for request */
.btn-request-header {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 10px;
  border: 1.5px solid #e8e8e8;
  background: #ffffff;
  color: #0d9488;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  font-family: inherit;
}

.btn-request-header:hover {
  border-color: #0d9488;
  background: #f0fdfa;
  color: #0d9488;
}

@media (max-width: 480px) {
  .btn-request-header span {
    display: none;
  }
  .btn-request-header {
    padding: 8px 10px;
  }
}