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

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ==============================
   SKIP LINK (Accessibility)
   ============================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background-color: #0d9488;
  color: #fff;
  padding: 8px 16px;
  border-radius: 8px;
  z-index: 9999;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* ==============================
   FOCUS STYLES (Accessibility)
   ============================== */
:focus-visible {
  outline: 2px solid #0d9488;
  outline-offset: 2px;
}

/* ==============================
   OVERLAY
   ============================== */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

[data-theme="dark"] .overlay {
  background-color: rgba(0, 0, 0, 0.6);
}

.overlay.open {
  display: block;
  opacity: 1;
}

/* ==============================
   TOAST
   ============================== */
.toast {
  position: fixed;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: #fff;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  z-index: 9999;
  white-space: nowrap;
  pointer-events: none;
  transition: top 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
  opacity: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .toast {
  background-color: rgba(26, 35, 50, 0.95);
  border-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.toast.show {
  top: 24px;
  opacity: 1;
}

.toast .toast-icon {
  color: #0d9488;
  display: flex;
  align-items: center;
}

/* ==============================
   THEME TOGGLE & LANG BUTTON
   ============================== */
.theme-toggle {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  line-height: 1;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lang-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: background 0.2s ease;
  white-space: nowrap;
  height: 32px;
  display: flex;
  align-items: center;
}

.lang-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ==============================
   ZOOM CONTROLS (Glass-morphism)
   ============================== */
.zoom-controls {
  position: absolute;
  top: 20px;
  left: 20px;
  display: flex;
  gap: 6px;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 4px;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .zoom-controls {
  background: rgba(26, 35, 50, 0.85);
  border-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.zoom-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: #334155;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.zoom-btn:hover {
  background-color: rgba(0, 0, 0, 0.06);
}

.zoom-btn:active {
  transform: scale(0.95);
}

[data-theme="dark"] .zoom-btn {
  color: #e1e8ed;
}

[data-theme="dark"] .zoom-btn:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

/* ==============================
   CONTROLS BAR (Glass-morphism)
   ============================== */
.controls-bar {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  gap: 10px;
}

[data-theme="dark"] .controls-bar {
  background: rgba(26, 35, 50, 0.8);
  border-top-color: rgba(255, 255, 255, 0.06);
}

/* Nav buttons (prev/next) */
.nav-btn {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: #334155;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, transform 0.1s ease, opacity 0.2s ease;
}

.nav-btn:hover:not(:disabled) {
  background-color: rgba(0, 0, 0, 0.06);
}

.nav-btn:active:not(:disabled) {
  transform: scale(0.95);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

[data-theme="dark"] .nav-btn {
  color: #e1e8ed;
}

[data-theme="dark"] .nav-btn:hover:not(:disabled) {
  background-color: rgba(255, 255, 255, 0.08);
}

/* Bookmark button */
.bookmark-btn {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: #334155;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, transform 0.1s ease, color 0.2s ease;
}

.bookmark-btn:hover {
  background-color: rgba(13, 148, 136, 0.1);
  color: #0d9488;
}

.bookmark-btn:active {
  transform: scale(0.95);
}

[data-theme="dark"] .bookmark-btn {
  color: #e1e8ed;
}

[data-theme="dark"] .bookmark-btn:hover {
  background-color: rgba(13, 148, 136, 0.15);
  color: #0d9488;
}

/* ==============================
   SLIDER SECTION
   ============================== */
.slider-section {
  flex: 1;
  position: relative;
  padding: 0 4px;
}

/* ==============================
   PAGE INDICATOR (Glass-morphism)
   ============================== */
.page-indicator {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 8px 16px;
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

[data-theme="dark"] .page-indicator {
  background: rgba(26, 35, 50, 0.85);
  border-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.page-indicator .surah-name {
  font-size: 0.75rem;
  font-weight: 500;
  color: #64748b;
  letter-spacing: 0.02em;
}

[data-theme="dark"] .page-indicator .surah-name {
  color: #94a3b8;
}

.page-indicator .page-number {
  font-size: 0.9rem;
  font-weight: 600;
  color: #1e293b;
}

[data-theme="dark"] .page-indicator .page-number {
  color: #e1e8ed;
}

@media (max-width: 768px) {
  .page-indicator {
    display: none;
  }
}

/* ==============================
   PAGE LOADER & SPINNER
   ============================== */
.page-loader {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
}

.page-loader.active {
  display: block;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 2.5px solid rgba(0, 0, 0, 0.08);
  border-top-color: #0d9488;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

[data-theme="dark"] .spinner {
  border-color: rgba(255, 255, 255, 0.08);
  border-top-color: #0d9488;
}

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

/* ==============================
   PAGE EXIT TRANSITION
   ============================== */
#quran-page-img.page-exit {
  opacity: 0;
}

/* ==============================
   SIDEBAR MENU ITEMS (JS-generated)
   ============================== */
.menu-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.menu-btn {
  width: 100%;
  padding: 14px 20px;
  background: none;
  border: none;
  color: #fff;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s ease;
  letter-spacing: 0.01em;
}

.menu-btn:hover {
  background-color: rgba(255, 255, 255, 0.06);
}

.arrow {
  font-size: 0.7rem;
  transition: transform 0.3s ease;
  opacity: 0.6;
}

/* Go-to-page label in sidebar */
.goto-label {
  padding: 15px 20px 5px 20px;
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
}

/* ==============================
   SUBMENU
   ============================== */
.submenu {
  list-style: none;
  background-color: rgba(0, 0, 0, 0.15);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.submenu.open {
  max-height: 600px;
}

.submenu li {
  padding: 11px 20px 11px 36px;
  cursor: pointer;
  transition: background 0.2s ease;
  font-size: 0.9rem;
}

.submenu li:hover {
  background-color: rgba(13, 148, 136, 0.3);
}

.juz-submenu {
  overflow-y: auto;
}

.juz-submenu.open {
  max-height: none;
}

/* ==============================
   SURAH SEARCH
   ============================== */
.surah-search {
  padding: 8px 12px;
  background-color: rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 0;
  z-index: 1;
}

.surah-search input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.06);
  color: #fff;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.surah-search input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.surah-search input:focus {
  border-color: rgba(13, 148, 136, 0.5);
}

[data-theme="dark"] .surah-search {
  background-color: rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .surah-search input {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.05);
}

/* ==============================
   GO TO PAGE
   ============================== */
.go-to-container {
  padding: 16px 20px;
  display: flex;
  gap: 8px;
}

.go-to-container input {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  outline: none;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.06);
  color: #fff;
  font-size: 0.85rem;
  transition: border-color 0.2s ease;
}

.go-to-container input:focus {
  border-color: rgba(13, 148, 136, 0.5);
}

[data-theme="dark"] .go-to-container input {
  background-color: rgba(255, 255, 255, 0.05);
  color: #e1e8ed;
}

.go-to-container button {
  padding: 8px 16px;
  background-color: #0d9488;
  border: none;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: opacity 0.2s ease, transform 0.1s ease;
}

.go-to-container button:hover {
  opacity: 0.9;
}

.go-to-container button:active {
  transform: scale(0.97);
}

/* ==============================
   SLIDER – Custom Track & Thumb
   ============================== */
.slider-input {
  -webkit-appearance: none;
  appearance: none;
  height: 5px;
  background: linear-gradient(to right, #e2e8f0, #cbd5e1);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  direction: rtl;
  margin-top: 0;
  position: relative;
  z-index: 1;
}

[data-theme="dark"] .slider-input {
  background: linear-gradient(to right, #1e293b, #334155);
}

.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #0d9488;
  cursor: pointer;
  position: relative;
  z-index: 2;
  box-shadow: 0 1px 6px rgba(13, 148, 136, 0.3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.slider-input:active::-webkit-slider-thumb {
  transform: scale(1.15);
  box-shadow: 0 2px 10px rgba(13, 148, 136, 0.4);
}

.slider-input::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #0d9488;
  cursor: pointer;
  border: none;
  position: relative;
  z-index: 2;
  box-shadow: 0 1px 6px rgba(13, 148, 136, 0.3);
}

/* ==============================
   SLIDER – Juz Tick Marks
   ============================== */
.slider-ticks {
  position: relative;
  height: 18px;
  margin-bottom: 2px;
}

.slider-tick {
  position: absolute;
  bottom: 0;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
}

.slider-tick.clickable {
  pointer-events: auto;
  cursor: pointer;
}

.slider-tick.clickable:hover .slider-tick-label {
  color: #0d9488;
}

.slider-tick.clickable:hover .slider-tick-line {
  background-color: #0d9488;
}

.slider-tick-line {
  width: 1px;
  background-color: rgba(0, 0, 0, 0.15);
  transition: background-color 0.15s ease;
}

.slider-tick-line.major {
  height: 10px;
}

.slider-tick-line.minor {
  height: 5px;
}

[data-theme="dark"] .slider-tick-line {
  background-color: rgba(255, 255, 255, 0.15);
}

.slider-tick-label {
  font-size: 0.6rem;
  font-weight: 600;
  line-height: 1;
  color: rgba(0, 0, 0, 0.35);
  white-space: nowrap;
  margin-bottom: 1px;
  transition: color 0.15s ease;
}

[data-theme="dark"] .slider-tick-label {
  color: rgba(255, 255, 255, 0.3);
}

/* ==============================
   SLIDER – Tooltip
   ============================== */
.slider-tooltip {
  position: absolute;
  top: -32px;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  white-space: nowrap;
  transform: translateX(-50%);
  z-index: 10;
}

.slider-tooltip::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: rgba(15, 23, 42, 0.92);
  border-radius: 1px;
  transform: translateX(-50%) rotate(45deg);
}

@media (max-width: 768px) {
  .controls-bar {
    padding: 8px 12px;
    gap: 6px;
  }

  .nav-btn,
  .bookmark-btn {
    width: 36px;
    height: 36px;
    min-width: 36px;
  }
}