/* ============================================
   PDF2JPEG — Premium Dark Glassmorphism Theme
   ============================================ */

/* ---------- Google Font ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  --bg-primary: #0b0d17;
  --bg-secondary: #111427;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(255, 255, 255, 0.15);

  --accent: #6c63ff;
  --accent-light: #8b83ff;
  --accent-glow: rgba(108, 99, 255, 0.35);
  --accent-gradient: linear-gradient(135deg, #6c63ff 0%, #c471f5 50%, #fa71cd 100%);

  --success: #00e599;
  --warning: #ffb547;
  --danger: #ff4d6a;

  --text-primary: #f0f0f5;
  --text-secondary: #9ea3b5;
  --text-muted: #5c6178;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 60px var(--accent-glow);

  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ---------- Animated Background ---------- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 600px at 20% 20%, rgba(108, 99, 255, 0.12), transparent),
    radial-gradient(ellipse 500px 500px at 80% 80%, rgba(196, 113, 245, 0.08), transparent),
    radial-gradient(ellipse 400px 400px at 60% 30%, rgba(250, 113, 205, 0.06), transparent);
  pointer-events: none;
  z-index: 0;
  animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
  0%   { opacity: 1; transform: scale(1); }
  100% { opacity: 0.7; transform: scale(1.1); }
}

/* ---------- Layout ---------- */
.app-wrapper {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ---------- Language Switcher ---------- */
.lang-switcher {
  position: absolute;
  top: 24px;
  right: 24px;
  inset-inline-end: 24px;
  z-index: 100;
}

.lang-switcher__btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 100px;
  justify-content: space-between;
}

.lang-switcher__btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
}

.lang-switcher.open .lang-switcher__btn {
  border-color: var(--accent);
  box-shadow: 0 0 15px var(--accent-glow);
}

.lang-switcher__btn .active-flag {
  font-size: 1.2rem;
}

.dropdown-chevron {
  font-size: 0.6rem;
  transition: transform var(--transition-fast);
  opacity: 0.5;
}

.lang-switcher.open .dropdown-chevron {
  transform: rotate(180deg);
}

.lang-switcher__list {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  inset-inline-end: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  list-style: none;
  padding: 8px;
  min-width: 150px;
  box-shadow: var(--shadow-card);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
}

.lang-switcher.open .lang-switcher__list {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-switcher__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  cursor: pointer;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: background var(--transition-fast);
}

.lang-switcher__list li span {
  font-size: 1.2rem;
}

.lang-switcher__list li:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-light);
}

.lang-switcher__list li.active {
  background: rgba(108, 99, 255, 0.1);
  color: var(--accent-light);
  font-weight: 600;
}

/* ---------- Header ---------- */
.header {
  text-align: center;
  margin-bottom: 48px;
}

.header__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.header__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-glow);
}

.header__title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  font-weight: 400;
  max-width: 480px;
  margin: 0 auto;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--border-glass-hover);
}

/* ---------- Drop Zone ---------- */
.drop-zone {
  border: 2px dashed var(--border-glass-hover);
  border-radius: var(--radius-md);
  padding: 56px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-normal), background var(--transition-normal), transform var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.drop-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
  border-radius: inherit;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  transform: scale(1.01);
}

.drop-zone:hover::before,
.drop-zone.drag-over::before {
  opacity: 0.06;
}

.drop-zone__icon {
  font-size: 48px;
  margin-bottom: 16px;
  display: block;
  position: relative;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.drop-zone__label {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  position: relative;
}

.drop-zone__hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
  position: relative;
}

.drop-zone__input {
  display: none;
}

/* ---------- File Info Bar ---------- */
.file-info {
  display: none;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
  padding: 14px 20px;
  background: rgba(108, 99, 255, 0.08);
  border: 1px solid rgba(108, 99, 255, 0.2);
  border-radius: var(--radius-sm);
  animation: fadeSlideIn 0.4s ease;
}

.file-info.visible {
  display: flex;
}

.file-info__icon {
  font-size: 28px;
  flex-shrink: 0;
}

.file-info__details {
  flex: 1;
  min-width: 0;
}

.file-info__name {
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-info__size {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.file-info__remove {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.file-info__remove:hover {
  color: var(--danger);
  background: rgba(255, 77, 106, 0.1);
}

/* ---------- Settings Row ---------- */
.settings-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

.setting-group {
  flex: 1;
  min-width: 180px;
}

.setting-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.setting-group select,
.setting-group input[type="range"] {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.setting-group select:focus,
.setting-group input[type="range"]:focus {
  outline: none;
  border-color: var(--accent);
}

.setting-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239ea3b5' viewBox='0 0 16 16'%3E%3Cpath d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* Quality slider */
.quality-value {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-light);
  margin-left: 8px;
}

input[type="range"] {
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-secondary);
  padding: 0 !important;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-gradient);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ---------- Convert Button ---------- */
.convert-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  margin-top: 28px;
  padding: 16px 32px;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-normal);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.convert-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.convert-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.convert-btn:hover::before {
  opacity: 1;
}

.convert-btn:active:not(:disabled) {
  transform: translateY(0);
}

.convert-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---------- Progress ---------- */
.progress-wrapper {
  display: none;
  margin-top: 24px;
  animation: fadeSlideIn 0.4s ease;
}

.progress-wrapper.visible {
  display: block;
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gradient);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-text {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* ---------- Results Section ---------- */
.results-section {
  display: none;
  margin-top: 36px;
  animation: fadeSlideIn 0.5s ease;
}

.results-section.visible {
  display: block;
}

.results-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.results-section__title {
  font-size: 1.2rem;
  font-weight: 700;
}

.download-all-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-light);
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid rgba(108, 99, 255, 0.25);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.download-all-btn:hover {
  background: rgba(108, 99, 255, 0.18);
  border-color: var(--accent);
}

/* ---------- Page Grid ---------- */
.pages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.page-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.page-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glass-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.page-card__preview {
  width: 100%;
  aspect-ratio: 210 / 297;
  object-fit: cover;
  display: block;
  background: var(--bg-secondary);
}

.page-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
}

.page-card__label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.page-card__download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(108, 99, 255, 0.1);
  color: var(--accent-light);
  text-decoration: none;
  font-size: 16px;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.page-card__download:hover {
  background: rgba(108, 99, 255, 0.25);
  transform: scale(1.1);
}

/* ---------- Error Toast ---------- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 1000;
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
  pointer-events: none;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.toast--error {
  background: rgba(255, 77, 106, 0.15);
  border: 1px solid rgba(255, 77, 106, 0.3);
  color: var(--danger);
}

.toast--success {
  background: rgba(0, 229, 153, 0.12);
  border: 1px solid rgba(0, 229, 153, 0.3);
  color: var(--success);
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  margin-top: 64px;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer a {
  color: var(--accent-light);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* ---------- Animations ---------- */
@keyframes fadeSlideIn {
  0%   { opacity: 0; transform: translateY(12px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ---------- Responsive ---------- */
/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .app-wrapper {
    padding: 28px 16px 60px;
  }

  .header__title {
    font-size: 1.5rem;
  }

  .glass-card {
    padding: 24px 18px;
  }

  .drop-zone {
    padding: 40px 16px;
  }

  .pages-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 14px;
  }

  .settings-row {
    flex-direction: column;
  }
}

/* ---------- RTL Support ---------- */
[dir="rtl"] .header__icon {
  transform: scaleX(-1);
}

[dir="rtl"] .drop-zone__icon {
  transform: scaleX(-1);
}

[dir="rtl"] .file-info__remove {
  margin-inline-start: auto;
}

[dir="rtl"] .setting-group select {
  background-position: left 14px center;
}

[dir="rtl"] .page-card__download {
  transform: scaleX(-1);
}
[dir="rtl"] .page-card__download:hover {
  transform: scaleX(-1) scale(1.1);
}

[dir="rtl"] .toast {
  left: auto;
  right: 50%;
  transform: translateX(50%) translateY(120px);
}
[dir="rtl"] .toast.visible {
  transform: translateX(50%) translateY(0);
}