/* فونت Vazir را به صورت صحیح اضافه می‌کنیم */
@import url('https://cdn.jsdelivr.net/gh/rastikerdar/vazir-font@v30.1.0/dist/font-face.css');
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

* {
  font-family: Vazir, sans-serif;
}

:root {
  --border-radius-lg: 20px;
  --border-radius-md: 12px;
  --border-radius-sm: 8px;
  --timing-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.15);
  --shadow-large: 0 15px 50px rgba(0, 0, 0, 0.2);
}

/* بقیه CSS مانند قبل */

/* --- Dark Theme (Default) --- */
.dark-theme {
  --bg-main: #0f1117;
  --bg-secondary: #1a1d28;
  --bg-gradient: linear-gradient(135deg, #1a152e 0%, #10111a 70%);
  --glass-bg: rgba(30, 33, 57, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text-main: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent1: #00f5d4;
  --accent1-light: #80faea;
  --accent2: #ff007f;
  --accent2-light: #ff80bf;
  --accent3: #7b2cbf;
  --accent3-light: #bd96f0;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --btn-secondary-bg: rgba(255, 255, 255, 0.08);
  --btn-secondary-hover-bg: rgba(255, 255, 255, 0.12);
}

/* --- Light Theme --- */
.light-theme {
  --bg-main: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-gradient: linear-gradient(135deg, #e2e8f0 0%, #f8fafc 70%);
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.06);
  --text-main: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent1: #007bff;
  --accent1-light: #66b3ff;
  --accent2: #e83e8c;
  --accent2-light: #f47fb8;
  --accent3: #6f42c1;
  --accent3-light: #a78bfa;
  --success: #059669;
  --warning: #d97706;
  --error: #dc2626;
  --btn-secondary-bg: rgba(0, 0, 0, 0.04);
  --btn-secondary-hover-bg: rgba(0, 0, 0, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Vazirmatn', 'Poppins', sans-serif;
  background-color: var(--bg-main);
  background-image: var(--bg-gradient);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  transition: all var(--timing-fast);
}

html[lang="en"] body {
  font-family: 'Poppins', sans-serif;
}

/* --- Header Styles --- */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Poppins', monospace;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent1);
  text-decoration: none;
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 2px 4px rgba(0, 245, 212, 0.3));
}

.logo span {
  color: var(--accent2);
  background: linear-gradient(135deg, var(--accent2), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-icon-header {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--accent1), var(--accent3));
  border-radius: 50%;
  color: white;
  text-decoration: none;
  transition: all var(--timing-fast);
  position: relative;
  overflow: hidden;
}

.contact-icon-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}

.contact-icon-header:hover::before {
  left: 100%;
}

.contact-icon-header:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 245, 212, 0.4);
}

.contact-icon-header i {
  font-size: 1.2rem;
  z-index: 1;
}

#theme-toggle {
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--timing-fast);
}

#theme-toggle:hover {
  background: var(--btn-secondary-hover-bg);
  transform: rotate(15deg);
}

#theme-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--text-secondary);
  transition: color var(--timing-fast);
}

.dark-theme .sun, .light-theme .moon { display: none; }
.dark-theme .moon, .light-theme .sun { display: block; }

.lang-switcher-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

#lang-switcher {
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  border-radius: var(--border-radius-md);
  padding: 0.6rem 2.5rem 0.6rem 1rem;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  appearance: none;
  min-width: 140px;
  transition: all var(--timing-fast);
}

#lang-switcher:hover {
  background: var(--btn-secondary-hover-bg);
  border-color: var(--accent1);
}

#lang-switcher:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 245, 212, 0.1);
}

.lang-arrow {
  position: absolute;
  left: 12px;
  color: var(--text-secondary);
  pointer-events: none;
  font-size: 0.8rem;
}

#lang-switcher option {
  background: var(--bg-main);
  color: var(--text-main);
  padding: 0.5rem;
}

/* --- Main Layout --- */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* --- Sidebar Styles --- */
#sidebar {
  position: sticky;
  top: 100px;
}

.sidebar-nav {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: var(--shadow-soft);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: var(--border-radius-md);
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-weight: 500;
  text-align: right;
  cursor: pointer;
  transition: all var(--timing-fast);
  position: relative;
  overflow: hidden;
}

.tab-btn::before {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: linear-gradient(to bottom, var(--accent1), var(--accent2));
  border-radius: 2px;
  transition: height var(--timing-fast);
}

html[lang="en"] .tab-btn {
  text-align: left;
}

html[lang="en"] .tab-btn::before {
  right: auto;
  left: 0;
}

.tab-btn i {
  width: 20px;
  text-align: center;
  color: var(--text-muted);
  transition: color var(--timing-fast);
}

.tab-btn:hover {
  background: var(--btn-secondary-bg);
  color: var(--text-main);
  transform: translateX(-4px);
}

html[lang="en"] .tab-btn:hover {
  transform: translateX(4px);
}

.tab-btn:hover i {
  color: var(--accent1);
}

.tab-btn.active {
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.1), rgba(255, 0, 127, 0.05));
  color: var(--accent1);
  border: 1px solid rgba(0, 245, 212, 0.2);
}

.tab-btn.active::before {
  height: 60%;
}

.tab-btn.active i {
  color: var(--accent1);
}

/* --- Panel Styles --- */
.panel {
  display: none;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  animation: fadeInUp 0.6s ease-out;
  box-shadow: var(--shadow-soft);
}

.panel.active {
  display: block;
}

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

.panel h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.panel-description {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

/* --- Uploader Styles --- */
.uploader {
  border: 2px dashed var(--accent1);
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.05), rgba(123, 44, 191, 0.05));
  padding: 3rem 2rem;
  text-align: center;
  margin-bottom: 2rem;
  cursor: pointer;
  transition: all var(--timing-fast);
  position: relative;
  overflow: hidden;
}

.uploader::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--accent1), var(--accent2), var(--accent3));
  transform: scaleX(0);
  transition: transform var(--timing-fast);
}

.uploader:hover::before {
  transform: scaleX(1);
}

.uploader:hover, .uploader.dragover {
  border-color: var(--accent2);
  background: linear-gradient(135deg, rgba(255, 0, 127, 0.1), rgba(123, 44, 191, 0.1));
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.uploader-icon {
  font-size: 3rem;
  color: var(--accent1);
  margin-bottom: 1rem;
  transition: all var(--timing-fast);
}

.uploader:hover .uploader-icon {
  color: var(--accent2);
  transform: scale(1.1);
}

.drop-hint {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.uploader-formats, .uploader-note {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* --- Controls Wrapper --- */
.controls-wrapper {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.preview-section {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2rem;
  align-items: start;
}

.preview-area {
  background: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  border: 1px solid var(--glass-border);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-area img {
  max-width: 100%;
  max-height: 400px;
  border-radius: var(--border-radius-sm);
  object-fit: contain;
  box-shadow: var(--shadow-soft);
}

.file-info {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* --- Controls Section --- */
.controls-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.control-group {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.control-header label {
  font-weight: 600;
  color: var(--text-main);
  font-size: 1rem;
}

.quality-value {
  font-family: 'Poppins', monospace;
  font-weight: 600;
  color: var(--accent1);
  background: rgba(0, 245, 212, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.9rem;
}

/* --- Modern Slider --- */
.slider-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.modern-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--accent2), var(--accent1));
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.modern-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent1);
  cursor: pointer;
  border: 3px solid white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  transition: all var(--timing-fast);
}

.modern-slider::-webkit-slider-thumb:hover {
  background: var(--accent2);
  transform: scale(1.2);
}

.modern-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent1);
  cursor: pointer;
  border: 3px solid white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --- Compression Preview --- */
.compression-preview {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.05), rgba(255, 0, 127, 0.05));
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  border: 1px solid var(--glass-border);
}

.size-comparison {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
}

.size-original, .size-compressed {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

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

.size-value {
  font-family: 'Poppins', monospace;
  font-weight: 600;
  font-size: 1.1rem;
}

.size-original .size-value {
  color: var(--text-secondary);
}

.size-compressed .size-value {
  color: var(--success);
}

.size-arrow {
  color: var(--text-muted);
}

.savings-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--success);
  color: white;
  padding: 1rem;
  border-radius: var(--border-radius-md);
  min-width: 80px;
}

.savings-badge span:first-child {
  font-size: 1.5rem;
  font-weight: 700;
}

.savings-badge span:last-child {
  font-size: 0.8rem;
  opacity: 0.9;
}

/* --- Compare Section --- */
.compare-section {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 2rem;
}

.compare-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.compare-header h3 {
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.compare-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.compare-box {
  position: relative;
  width: 100%;
  max-width: 600px;
  height: 400px;
  margin: 0 auto;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow-medium);
}

.compare-box .img-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.compare-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.compare-box .after {
  clip-path: inset(0 50% 0 0);
}

.compare-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: ew-resize;
  margin: 0;
  z-index: 10;
}

.compare-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 4px;
  height: 100%;
  background: var(--accent1);
  box-shadow: 0 0 20px var(--accent1);
  cursor: ew-resize;
}

.slider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  background: var(--accent1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  pointer-events: none;
  z-index: 5;
  box-shadow: 0 4px 15px rgba(0, 245, 212, 0.4);
}

.img-label {
  position: absolute;
  top: 15px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  z-index: 2;
  pointer-events: none;
  backdrop-filter: blur(10px);
}

.before-label {
  right: 15px;
}

.after-label {
  left: 15px;
}

html[lang="en"] .before-label {
  right: auto;
  left: 15px;
}

html[lang="en"] .after-label {
  left: auto;
  right: 15px;
}

/* --- Actions --- */
.actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary, .btn-secondary, .download-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  border-radius: var(--border-radius-md);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--timing-fast);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  color: white;
  box-shadow: 0 4px 15px rgba(0, 245, 212, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 245, 212, 0.4);
}

.btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: var(--btn-secondary-hover-bg);
  transform: translateY(-2px);
  border-color: var(--accent1);
}

.download-link {
  background: linear-gradient(135deg, var(--success), #10b981);
  color: white;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.download-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

/* --- Status Bar --- */
.statusbar {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: var(--border-radius-md);
  font-size: 0.9rem;
  text-align: center;
  min-height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.statusbar.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.statusbar.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.statusbar.info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent1);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

/* --- Resize Panel Specific Styles --- */
.preset-sizes {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
}

.preset-sizes h4 {
  color: var(--text-main);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.preset-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.preset-btn {
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--timing-fast);
  text-align: center;
}

.preset-btn:hover {
  background: var(--btn-secondary-hover-bg);
  border-color: var(--accent1);
  transform: translateY(-1px);
}

.dimension-controls {
  display: flex;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.dimension-separator {
  color: var(--text-muted);
  padding-bottom: 2rem;
}

.input-with-unit {
  position: relative;
  display: flex;
  align-items: center;
}

.dimension-input {
  background: var(--bg-main);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  font-size: 1rem;
  color: var(--text-main);
  font-family: inherit;
  width: 120px;
  transition: all var(--timing-fast);
}

.dimension-input:focus {
  outline: none;
  border-color: var(--accent1);
  box-shadow: 0 0 0 3px rgba(0, 245, 212, 0.1);
}

.input-unit {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
}

.control-options {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.control-item-checkbox {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.control-item-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent1);
}

.control-item-checkbox label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
  cursor: pointer;
  font-size: 0.9rem;
}

.control-item-checkbox i {
  color: var(--accent1);
  font-size: 0.8rem;
}

.size-info {
  display: flex;
  justify-content: space-between;
  background: var(--btn-secondary-bg);
  border-radius: var(--border-radius-sm);
  padding: 1rem;
  margin-top: 1rem;
  font-size: 0.9rem;
}

.original-size {
  color: var(--text-secondary);
}

.new-size {
  color: var(--accent1);
  font-weight: 600;
}

/* --- Convert Panel Specific Styles --- */
.format-recommendation {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
}

.format-recommendation h4 {
  color: var(--text-main);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.recommendation-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.format-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 1rem;
  cursor: pointer;
  transition: all var(--timing-fast);
}

.format-card:hover {
  background: var(--btn-secondary-hover-bg);
  border-color: var(--accent1);
  transform: translateY(-2px);
}

.format-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.8rem;
  color: white;
}

.format-icon.webp {
  background: linear-gradient(135deg, #4285f4, #34a853);
}

.format-icon.avif {
  background: linear-gradient(135deg, #ff6b6b, #ee5a24);
}

.format-info {
  flex: 1;
}

.format-info strong {
  display: block;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.format-info span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.modern-select {
  background: var(--bg-main);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: 1rem;
  font-size: 1rem;
  color: var(--text-main);
  font-family: inherit;
  width: 100%;
  cursor: pointer;
  transition: all var(--timing-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 1rem center;
  background-size: 1rem;
}

html[lang="fa"] .modern-select {
  background-position: right 1rem center;
}

.modern-select:focus {
  outline: none;
  border-color: var(--accent1);
  box-shadow: 0 0 0 3px rgba(0, 245, 212, 0.1);
}

.format-info-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--btn-secondary-bg);
  border-radius: var(--border-radius-sm);
  padding: 1rem;
}

.info-card i {
  color: var(--accent1);
  font-size: 1.2rem;
}

.info-content {
  flex: 1;
}

.info-content strong {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.info-content span {
  font-size: 0.9rem;
  color: var(--text-main);
}

/* --- Batch Panel Specific Styles --- */
.batch-header {
  display: flex;
  justify-content: space-between;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.files-count, .total-size {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-main);
}

.files-count i, .total-size i {
  color: var(--accent1);
}

.mode-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  background: var(--btn-secondary-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 2rem 1.5rem;
  cursor: pointer;
  transition: all var(--timing-fast);
  text-align: center;
}

.mode-btn:hover {
  background: var(--btn-secondary-hover-bg);
  border-color: var(--accent1);
  transform: translateY(-2px);
}

.mode-btn.active {
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.1), rgba(255, 0, 127, 0.05));
  border-color: var(--accent1);
}

.mode-btn i {
  font-size: 2rem;
  color: var(--accent1);
}

.mode-btn span {
  font-weight: 600;
  color: var(--text-main);
  font-size: 1.1rem;
}

.mode-btn small {
  color: var(--text-secondary);
  font-size: 0.8rem;
  line-height: 1.4;
}

.batch-preview {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.batch-preview h4 {
  color: var(--text-main);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 200px;
  overflow-y: auto;
}

.file-list-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--btn-secondary-bg);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius-sm);
  font-family: 'Poppins', monospace;
  font-size: 0.9rem;
  color: var(--text-main);
}

.file-list-item::before {
  content: '🖼️';
  font-size: 0.8rem;
}

.batch-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.summary-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--btn-secondary-bg);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
}

.summary-card i {
  font-size: 1.5rem;
  color: var(--accent1);
}

.summary-content {
  flex: 1;
}

.summary-content span {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.summary-content strong {
  font-size: 1.1rem;
  color: var(--text-main);
}

/* --- Footer Styles --- */
footer {
  margin-top: auto;
  padding: 2rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-separator {
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--timing-fast);
}

.footer-links a:hover {
  color: var(--accent1);
}

/* --- Utility Classes --- */
.full-width {
  width: 100%;
}

.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.hidden {
  display: none !important;
}

/* --- Loading Animation --- */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}
/* سیستم نوتیفیکیشن پیشرفته */
.notification-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  max-width: 400px;
}

.notification {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: 1rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-large);
  display: flex;
  align-items: center;
  gap: 1rem;
  transform: translateX(400px);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  border-right: 4px solid transparent;
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification.success {
  border-right-color: var(--success);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), var(--glass-bg));
}

.notification.error {
  border-right-color: var(--error);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), var(--glass-bg));
}

.notification.warning {
  border-right-color: var(--warning);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), var(--glass-bg));
}

.notification.info {
  border-right-color: var(--accent1);
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.1), var(--glass-bg));
}

.notification-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.notification.success .notification-icon {
  background: var(--success);
  color: white;
}

.notification.error .notification-icon {
  background: var(--error);
  color: white;
}

.notification.warning .notification-icon {
  background: var(--warning);
  color: white;
}

.notification.info .notification-icon {
  background: var(--accent1);
  color: white;
}

.notification-content {
  flex: 1;
}

.notification-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--text-main);
}

.notification-message {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.4;
}

.notification-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  transition: all var(--timing-fast);
}

.notification-close:hover {
  background: var(--btn-secondary-bg);
  color: var(--text-main);
}

/* مدال حریم خصوصی */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 1rem;
}

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

.modal {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-large);
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  transition: all var(--timing-fast);
}

.modal-close:hover {
  background: var(--btn-secondary-bg);
  color: var(--text-main);
}

.modal-body {
  padding: 2rem;
}

.modal-section {
  margin-bottom: 2rem;
}

.modal-section:last-child {
  margin-bottom: 0;
}

.modal-section h3 {
  color: var(--accent1);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.modal-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.modal-section ul {
  color: var(--text-secondary);
  padding-right: 1.5rem;
  line-height: 1.8;
}

.modal-section li {
  margin-bottom: 0.5rem;
}
/* بهبود بخش مقایسه */
.compare-box {
  position: relative;
  width: 100%;
  max-width: 800px;
  height: 500px;
  margin: 0 auto;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow-large);
  cursor: col-resize;
}

.compare-box .img-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.compare-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
}

.compare-box .before {
  z-index: 1;
}

.compare-box .after {
  z-index: 2;
  clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}

.compare-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: col-resize;
  margin: 0;
  z-index: 3;
  opacity: 0;
}

.compare-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 4px;
  height: 100%;
  background: transparent;
  cursor: col-resize;
}

.compare-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: var(--accent1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  pointer-events: none;
  z-index: 4;
  box-shadow: 0 4px 20px rgba(0, 245, 212, 0.4);
  border: 4px solid white;
  transition: all var(--timing-fast);
}

.compare-handle:hover {
  transform: translate(-50%, -50%) scale(1.1);
}

.compare-handle i {
  font-size: 1.2rem;
}

.compare-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: var(--accent1);
  pointer-events: none;
  z-index: 3;
  box-shadow: 0 0 10px var(--accent1);
}

.img-label {
  position: absolute;
  top: 20px;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 25px;
  font-size: 0.9rem;
  z-index: 5;
  pointer-events: none;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.before-label {
  right: 20px;
}

.after-label {
  left: 20px;
}

html[lang="en"] .before-label {
  right: auto;
  left: 20px;
}

html[lang="en"] .after-label {
  left: auto;
  right: 20px;
}
/* بهبود رسپانسیو */
@media (max-width: 1200px) {
  .container {
    max-width: 100%;
    padding: 1.5rem;
  }
  
  .preview-section {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* به CSS اضافه کن */
.logo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 2px 4px rgba(0, 245, 212, 0.3));
}
.logo-icon-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo-icon-link:hover {
    transform: scale(1.1);
}
.logo-icon {
  width: 48px;
  height: 48px;
  filter: drop-shadow(0 2px 4px rgba(0, 245, 212, 0.3));
  border-radius: 50%;
}
/* فونت Vazir را به صورت صحیح اضافه می‌کنیم */
@import url('https://cdn.jsdelivr.net/gh/rastikerdar/vazir-font@v30.1.0/dist/font-face.css');
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
  /* Design Tokens */
  --border-radius-lg: 20px;
  --border-radius-md: 12px;
  --border-radius-sm: 8px;
  --timing-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.15);
  --shadow-large: 0 15px 50px rgba(0, 0, 0, 0.2);
  
  /* Spacing System */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* Typography Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
}

/* ========== BREAKPOINTS SYSTEM ========== */
/* Mobile First Approach */

/* Base Styles (Mobile) */
:root {
  --container-padding: 1rem;
  --header-height: 60px;
  --sidebar-width: 100%;
}

/* Small Mobile (>= 375px) */
@media (min-width: 375px) {
  :root {
    --container-padding: 1.25rem;
  }
}

/* Tablet (>= 768px) */
@media (min-width: 768px) {
  :root {
    --container-padding: 2rem;
    --header-height: 70px;
    --sidebar-width: 280px;
    --text-lg: 1.25rem;
    --text-xl: 1.5rem;
    --text-2xl: 1.75rem;
    --text-3xl: 2.25rem;
  }
}

/* Desktop (>= 1024px) */
@media (min-width: 1024px) {
  :root {
    --container-padding: 2.5rem;
    --sidebar-width: 300px;
  }
}

/* Large Desktop (>= 1200px) */
@media (min-width: 1200px) {
  :root {
    --container-padding: 3rem;
  }
}

/* ========== RESET & BASE STYLES ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Vazirmatn', 'Poppins', sans-serif;
  background-color: var(--bg-main);
  background-image: var(--bg-gradient);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  transition: all var(--timing-fast);
}

/* ========== THEMES ========== */
/* --- Dark Theme (Default) --- */
.dark-theme {
  --bg-main: #0f1117;
  --bg-secondary: #1a1d28;
  --bg-gradient: linear-gradient(135deg, #1a152e 0%, #10111a 70%);
  --glass-bg: rgba(30, 33, 57, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text-main: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent1: #00f5d4;
  --accent1-light: #80faea;
  --accent2: #ff007f;
  --accent2-light: #ff80bf;
  --accent3: #7b2cbf;
  --accent3-light: #bd96f0;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --btn-secondary-bg: rgba(255, 255, 255, 0.08);
  --btn-secondary-hover-bg: rgba(255, 255, 255, 0.12);
}

/* --- Light Theme --- */
.light-theme {
  --bg-main: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-gradient: linear-gradient(135deg, #e2e8f0 0%, #f8fafc 70%);
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.06);
  --text-main: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent1: #007bff;
  --accent1-light: #66b3ff;
  --accent2: #e83e8c;
  --accent2-light: #f47fb8;
  --accent3: #6f42c1;
  --accent3-light: #a78bfa;
  --success: #059669;
  --warning: #d97706;
  --error: #dc2626;
  --btn-secondary-bg: rgba(0, 0, 0, 0.04);
  --btn-secondary-hover-bg: rgba(0, 0, 0, 0.08);
}

/* ========== LAYOUT COMPONENTS ========== */

/* Container System */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  gap: var(--space-lg);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-cols-1 { grid-template-columns: 1fr; }

/* ========== HEADER ========== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
}

.header-container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 0 var(--container-padding);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: 'Poppins', monospace;
  font-weight: 700;
  color: var(--accent1);
  text-decoration: none;
  font-size: var(--text-xl);
}

.logo-icon {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 2px 4px rgba(0, 245, 212, 0.3));
}

.logo span {
  color: var(--accent2);
  background: linear-gradient(135deg, var(--accent2), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.contact-icon-header,
#theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--timing-fast);
}

.contact-icon-header {
  background: linear-gradient(135deg, var(--accent1), var(--accent3));
  color: white;
  text-decoration: none;
}

#theme-toggle {
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  cursor: pointer;
}

/* Language Switcher */
.lang-switcher-wrapper {
  position: relative;
  display: none; /* Hidden on mobile */
}

#lang-switcher {
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  border-radius: var(--border-radius-md);
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  font-family: inherit;
  font-size: var(--text-sm);
  cursor: pointer;
  appearance: none;
  min-width: 140px;
}

/* ========== MAIN LAYOUT ========== */
.container {
  padding: var(--space-lg) 0;
}

@media (min-width: 1024px) {
  .container {
    grid-template-columns: var(--sidebar-width) 1fr;
    gap: var(--space-xl);
    padding: var(--space-xl) 0;
  }
}

/* ========== SIDEBAR ========== */
#sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-lg));
  z-index: 100;
}

.sidebar-nav {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-md);
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.sidebar-nav::-webkit-scrollbar {
  display: none;
}

@media (min-width: 1024px) {
  .sidebar-nav {
    flex-direction: column;
    overflow-x: visible;
    padding: var(--space-lg);
  }
}

/* Tab Buttons */
.tab-btn {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  font-size: var(--text-base);
  font-weight: 500;
  text-align: right;
  cursor: pointer;
  transition: all var(--timing-fast);
  white-space: nowrap;
  flex-shrink: 0;
  min-height: 44px;
}

.tab-btn i {
  width: 20px;
  text-align: center;
  color: var(--text-muted);
  transition: color var(--timing-fast);
}

.tab-btn.active {
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.1), rgba(255, 0, 127, 0.05));
  color: var(--accent1);
  border: 1px solid rgba(0, 245, 212, 0.2);
}

.tab-btn.active i {
  color: var(--accent1);
}

@media (min-width: 1024px) {
  .tab-btn {
    text-align: right;
    white-space: normal;
  }
}

/* ========== PANELS ========== */
.panel {
  display: none;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  animation: fadeInUp 0.6s ease-out;
}

.panel.active {
  display: block;
}

.panel h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.panel-description {
  color: var(--text-secondary);
  font-size: var(--text-base);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

@media (min-width: 768px) {
  .panel {
    padding: var(--space-xl);
  }
  
  .panel h1 {
    font-size: var(--text-3xl);
  }
}

/* ========== UPLOADER ========== */
.uploader {
  border: 2px dashed var(--accent1);
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.05), rgba(123, 44, 191, 0.05));
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  margin-bottom: var(--space-xl);
  cursor: pointer;
  transition: all var(--timing-fast);
}

.uploader-icon {
  font-size: 2.5rem;
  color: var(--accent1);
  margin-bottom: var(--space-md);
}

.drop-hint {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: var(--space-sm);
}

.uploader-formats, .uploader-note {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

@media (min-width: 768px) {
  .uploader {
    padding: var(--space-2xl);
  }
  
  .uploader-icon {
    font-size: 3rem;
  }
}

/* ========== CONTROLS ========== */
.controls-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.preview-section {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .preview-section {
    grid-template-columns: 1fr 300px;
  }
}

.preview-area {
  background: var(--bg-secondary);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  border: 1px solid var(--glass-border);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-area img {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--border-radius-sm);
  object-fit: contain;
}

.file-info {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Control Groups */
.control-group {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
}

.control-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

@media (min-width: 768px) {
  .control-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.quality-value {
  font-family: 'Poppins', monospace;
  font-weight: 600;
  color: var(--accent1);
  background: rgba(0, 245, 212, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: var(--text-sm);
  align-self: flex-start;
}

/* Sliders */
.slider-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.modern-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--accent2), var(--accent1));
  outline: none;
  -webkit-appearance: none;
}

.modern-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent1);
  cursor: pointer;
  border: 3px solid white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

/* Compression Preview */
.compression-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.05), rgba(255, 0, 127, 0.05));
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  border: 1px solid var(--glass-border);
}

@media (min-width: 768px) {
  .compression-preview {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.size-comparison {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
  justify-content: center;
}

.size-original, .size-compressed {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.size-label {
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.size-value {
  font-family: 'Poppins', monospace;
  font-weight: 600;
  font-size: var(--text-lg);
}

.size-arrow {
  color: var(--text-muted);
}

@media (max-width: 767px) {
  .size-arrow {
    transform: rotate(90deg);
  }
}

.savings-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--success);
  color: white;
  padding: var(--space-md);
  border-radius: var(--border-radius-md);
  min-width: 80px;
}

/* Compare Section */
.compare-section {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-xl);
}

.compare-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.compare-box {
  position: relative;
  width: 100%;
  height: 300px;
  margin: 0 auto;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background: #000;
}

@media (min-width: 768px) {
  .compare-box {
    height: 400px;
    max-width: 600px;
  }
}

@media (min-width: 1024px) {
  .compare-box {
    height: 500px;
    max-width: 800px;
  }
}

.compare-box .img-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.compare-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.compare-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  -webkit-appearance: none;
  background: transparent;
  cursor: col-resize;
  margin: 0;
  z-index: 10;
}

.slider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  background: var(--accent1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  pointer-events: none;
  z-index: 5;
}

@media (max-width: 767px) {
  .slider-handle {
    width: 40px;
    height: 40px;
  }
}

.img-label {
  position: absolute;
  top: 15px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: var(--text-sm);
  z-index: 2;
  backdrop-filter: blur(10px);
}

.before-label {
  right: 15px;
}

.after-label {
  left: 15px;
}

/* ========== ACTIONS ========== */
.actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: stretch;
}

@media (min-width: 768px) {
  .actions {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }
}

.btn-primary, .btn-secondary, .download-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--border-radius-md);
  font-family: inherit;
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--timing-fast);
  min-height: 44px;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  color: white;
}

.btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
}

.download-link {
  background: linear-gradient(135deg, var(--success), #10b981);
  color: white;
}

/* ========== RESIZE PANEL ========== */
.preset-sizes {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
}

.preset-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 768px) {
  .preset-buttons {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

.preset-btn {
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
  font-size: var(--text-sm);
  color: var(--text-main);
  cursor: pointer;
  transition: all var(--timing-fast);
  text-align: center;
  min-height: 44px;
}

.dimension-controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
  .dimension-controls {
    flex-direction: row;
    align-items: end;
    gap: var(--space-lg);
  }
}

.dimension-separator {
  display: none;
}

@media (min-width: 768px) {
  .dimension-separator {
    display: block;
    color: var(--text-muted);
    padding-bottom: 2rem;
  }
}

.input-with-unit {
  position: relative;
  display: flex;
  align-items: center;
}

.dimension-input {
  background: var(--bg-main);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md) 2.5rem var(--space-md) var(--space-md);
  font-size: var(--text-base);
  color: var(--text-main);
  font-family: inherit;
  width: 100%;
}

@media (min-width: 768px) {
  .dimension-input {
    width: 120px;
  }
}

.input-unit {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.control-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .control-options {
    flex-direction: row;
    gap: var(--space-xl);
  }
}

.control-item-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.size-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  background: var(--btn-secondary-bg);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
  margin-top: var(--space-md);
  font-size: var(--text-sm);
}

@media (min-width: 768px) {
  .size-info {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ========== CONVERT PANEL ========== */
.format-recommendation {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
}

.recommendation-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .recommendation-cards {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

.format-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--btn-secondary-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
  cursor: pointer;
  transition: all var(--timing-fast);
  min-height: 44px;
}

.modern-select {
  background: var(--bg-main);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
  font-size: var(--text-base);
  color: var(--text-main);
  font-family: inherit;
  width: 100%;
  cursor: pointer;
  min-height: 44px;
}

.format-info-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .format-info-panel {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

.info-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--btn-secondary-bg);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
}

/* ========== BATCH PANEL ========== */
.batch-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
  .batch-header {
    flex-direction: row;
    justify-content: space-between;
  }
}

.mode-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .mode-buttons {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  background: var(--btn-secondary-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-xl) var(--space-lg);
  cursor: pointer;
  transition: all var(--timing-fast);
  text-align: center;
  min-height: 120px;
}

.batch-preview {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-height: 200px;
  overflow-y: auto;
}

.file-list-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--btn-secondary-bg);
  padding: var(--space-md);
  border-radius: var(--border-radius-sm);
  font-family: 'Poppins', monospace;
  font-size: var(--text-sm);
  color: var(--text-main);
}

.batch-summary {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

@media (min-width: 768px) {
  .batch-summary {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

.summary-card {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--btn-secondary-bg);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg);
}

/* ========== FOOTER ========== */
footer {
  margin-top: auto;
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--glass-border);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: right;
  }
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

@media (min-width: 768px) {
  .footer-info {
    flex-direction: row;
    gap: var(--space-md);
  }
}

.footer-separator {
  display: none;
}

@media (min-width: 768px) {
  .footer-separator {
    display: block;
    color: var(--text-muted);
  }
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

/* ========== UTILITY CLASSES ========== */
.statusbar {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  border-radius: var(--border-radius-md);
  font-size: var(--text-sm);
  text-align: center;
  min-height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.statusbar.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.statusbar.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.text-center {
  text-align: center;
}

.hidden {
  display: none !important;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== RESPONSIVE IMPROVEMENTS ========== */

/* Tablet Improvements */
@media (min-width: 768px) {
  .header-actions {
    gap: var(--space-md);
  }
  
  .contact-icon-header,
  #theme-toggle {
    width: 44px;
    height: 44px;
  }
  
  .lang-switcher-wrapper {
    display: block;
  }
}

/* Desktop Improvements */
@media (min-width: 1024px) {
  .logo {
    font-size: var(--text-2xl);
  }
  
  .logo-icon {
    width: 40px;
    height: 40px;
  }
}

/* Large Desktop Improvements */
@media (min-width: 1200px) {
  .container {
    gap: var(--space-2xl);
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
  .tab-btn:hover {
    transform: none;
    background: transparent;
  }
  
  .tab-btn:active {
    background: var(--btn-secondary-bg);
  }
  
  .btn-primary:hover,
  .btn-secondary:hover,
  .download-link:hover {
    transform: none;
  }
  
  .btn-primary:active,
  .btn-secondary:active,
  .download-link:active {
    transform: scale(0.98);
  }
}

/* High Contrast Support */
@media (prefers-contrast: high) {
  .glass-bg {
    background: var(--bg-secondary);
    backdrop-filter: none;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}