:root {
    /* Cores principais */
    --primary-color: #1DA1F2;
    --primary-dark: #1a91da;
    --secondary-color: #14171a;
    
    /* Tema escuro (padrão) */
    --bg-primary: #000000;
    --bg-secondary: #0d1117;
    --bg-tertiary: #161b22;
    --text-primary: #ffffff;
    --text-secondary: #8b949e;
    --text-muted: #656d76;
    --border-color: #30363d;
    --border-light: #21262d;
    
    /* Estados */
    --success-color: #238636;
    --success-bg: rgba(35, 134, 54, 0.1);
    --error-color: #da3633;
    --error-bg: rgba(218, 54, 51, 0.1);
    --warning-color: #f85149;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #1DA1F2 0%, #1a91da 100%);
    --gradient-dark: linear-gradient(135deg, #161b22 0%, #0d1117 100%);
    
    /* Variáveis específicas para modais */
    --modal-backdrop-bg: rgba(0, 0, 0, 0.75);
    --modal-content-bg: var(--bg-secondary);
    --modal-header-bg: var(--bg-tertiary);
}

/* Tema claro */
.light-theme {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #ffffff;
    --text-primary: #24292f;
    --text-secondary: #656d76;
    --text-muted: #8b949e;
    --border-color: #d0d7de;
    --border-light: #d8dee4;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    
    /* Modais tema claro */
    --modal-backdrop-bg: rgba(0, 0, 0, 0.5);
    --modal-content-bg: var(--bg-primary);
    --modal-header-bg: var(--bg-secondary);
}

/* Reset e base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s ease;
}

/* MODAL ENHANCEMENTS - Efeito backdrop melhorado */
.modal-backdrop {
    background-color: var(--modal-backdrop-bg) !important;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    transition: all 0.3s ease;
}

.modal.fade .modal-dialog {
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
    transform: translate(0, -50px) scale(0.95);
}

.modal.show .modal-dialog {
    transform: translate(0, 0) scale(1);
}

.modal-content {
    background: var(--modal-content-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.modal-header {
    background: var(--modal-header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
}

.modal-title {
    color: var(--text-primary);
    font-weight: 600;
}

.modal-body {
    color: var(--text-primary);
    padding: 2rem;
}

.modal-footer {
    background: var(--modal-header-bg);
    border-top: 1px solid var(--border-color);
    padding: 1rem 2rem;
}

/* Botão fechar modal - melhor compatibilidade entre temas */
.btn-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.btn-close:hover {
    opacity: 1;
}

/* Tema escuro - botão fechar branco */
body:not(.light-theme) .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Tema claro - botão fechar escuro */
.light-theme .btn-close {
    filter: none;
    color: var(--text-primary);
}

/* Features Modal */
.feature-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 1rem;
    border: 1px solid var(--border-light);
    height: 100%;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.feature-item h6 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.preset-demo {
    text-align: center;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 0.75rem;
    border: 1px solid var(--border-light);
}

.preset-demo i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
}

.preset-demo strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.preset-demo small {
    color: var(--text-secondary);
}

/* FAQ Modal - Accordion melhorado */
.accordion {
    --bs-accordion-bg: var(--bg-tertiary);
    --bs-accordion-border-color: var(--border-color);
    --bs-accordion-btn-bg: var(--bg-tertiary);
    --bs-accordion-btn-color: var(--text-primary);
    --bs-accordion-active-bg: var(--bg-secondary);
    --bs-accordion-active-color: var(--text-primary);
    --bs-accordion-border-radius: 0.75rem;
}

.accordion-item {
    border-radius: 0.75rem !important;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.accordion-button {
    font-weight: 600;
    padding: 1rem 1.25rem;
    border-radius: 0.75rem !important;
    transition: all 0.3s ease;
}

.accordion-button:not(.collapsed) {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(29, 161, 242, 0.25);
    border-color: var(--primary-color);
}

.accordion-body {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 1.5rem 1.25rem;
}

.accordion-body strong {
    color: var(--text-primary);
}

.accordion-body ul {
    color: var(--text-secondary);
}

.accordion-body .badge {
    font-size: 0.7rem;
}

/* Navbar melhorada */
.navbar {
    background: var(--bg-secondary);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero Section */
.hero-section {
    background: var(--gradient-dark);
    padding: 4rem 0;
    border-bottom: 1px solid var(--border-color);
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    padding: 3rem 0;
}

.compressor-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.compressor-card .card-header {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
}

.compressor-card .card-body {
    padding: 2rem;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bg-tertiary);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(29, 161, 242, 0.05) 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--primary-color);
    background: var(--bg-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.upload-zone:hover::before,
.upload-zone.drag-over::before {
    opacity: 1;
}

.upload-content {
    position: relative;
    z-index: 2;
}

.upload-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.upload-subtitle {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.upload-formats {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.format-badge {
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
}

.upload-limit {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* File Preview */
.file-preview {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 1rem;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.file-preview-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.file-details {
    flex: 1;
}

.file-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.file-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

/* Compression Controls */
.compression-controls {
    margin: 2rem 0;
}

.control-title {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 600;
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.preset-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.preset-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.preset-card.active {
    border-color: var(--primary-color);
    background: rgba(29, 161, 242, 0.1);
}

.preset-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.preset-name {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.preset-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.preset-reduction {
    color: var(--success-color);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Resolution Controls */
.resolution-controls {
    margin: 2rem 0;
}

.resolution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.resolution-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    border-radius: 1rem;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.resolution-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.resolution-card.active {
    border-color: var(--primary-color);
    background: rgba(29, 161, 242, 0.1);
}

.resolution-card.active::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 2px solid var(--bg-primary);
}

.resolution-card.active::before {
    content: '✓';
    position: absolute;
    top: 2px;
    right: 2px;
    width: 16px;
    height: 16px;
    color: white;
    font-size: 10px;
    font-weight: bold;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.resolution-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.resolution-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.resolution-desc {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 0.25rem;
}

.resolution-detail {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.resolution-info {
    border-radius: 0.75rem;
    overflow: hidden;
}

.resolution-info .alert {
    margin: 0;
    border: none;
    background: rgba(29, 161, 242, 0.1);
    color: var(--text-primary);
    border: 1px solid rgba(29, 161, 242, 0.2);
}

/* Fine Controls */
.fine-controls {
    background: var(--bg-tertiary);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.slider-container {
    margin-top: 1rem;
}

.slider-label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 500;
}

.quality-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: var(--border-color);
    outline: none;
    margin-bottom: 0.5rem;
    -webkit-appearance: none;
    appearance: none;
}

.quality-slider::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow-sm);
}

.quality-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow-sm);
}

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

/* Size Estimate */
.size-estimate {
    background: linear-gradient(135deg, rgba(29, 161, 242, 0.1) 0%, rgba(29, 161, 242, 0.05) 100%);
    border: 1px solid rgba(29, 161, 242, 0.2);
    border-radius: 1rem;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.estimate-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

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

.estimate-original,
.estimate-compressed {
    text-align: center;
    flex: 1;
}

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

.estimate-value {
    font-weight: 600;
    font-size: 1.1rem;
}

.estimate-resolution {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.estimate-arrow {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0 1rem;
}

.estimate-savings {
    text-align: center;
    padding: 1rem;
    background: var(--success-bg);
    border-radius: 0.5rem;
}

.savings-value {
    font-weight: 700;
    color: var(--success-color);
}

/* Action Section */
.action-section {
    text-align: center;
    margin: 2rem 0;
}

.btn-compress {
    position: relative;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 3rem;
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    min-width: 200px;
}

.btn-compress:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-compress:disabled {
    opacity: 0.7;
    transform: none;
    cursor: not-allowed;
}

.btn-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Processing State */
.processing-state {
    text-align: center;
    padding: 3rem 2rem;
}

.processing-animation {
    margin-bottom: 2rem;
}

.processing-circle {
    width: 80px;
    height: 80px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
    position: relative;
}

.processing-inner {
    width: 60px;
    height: 60px;
    border: 3px solid transparent;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin-reverse 1.5s linear infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

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

@keyframes spin-reverse {
    0% { transform: translate(-50%, -50%) rotate(360deg); }
    100% { transform: translate(-50%, -50%) rotate(0deg); }
}

.processing-title {
    margin-bottom: 0.5rem;
}

.processing-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.progress-container {
    max-width: 400px;
    margin: 0 auto 2rem;
}

.progress {
    height: 12px;
    background: var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.processing-tips {
    margin-top: 2rem;
    min-height: 2rem;
}

.tip {
    display: none;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tip.active {
    display: flex;
}

/* Info Sidebar */
.info-sidebar {
    position: sticky;
    top: 120px;
}

.info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.info-card h5 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.feature-list i {
    color: var(--success-color);
}

.format-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.format-item {
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Result Success Styles */
.result-success {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-lg);
}

.result-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    text-align: left;
}

.result-icon {
    font-size: 3rem;
}

.result-title h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.result-stats {
    margin-bottom: 2rem;
}

.stat-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 0.75rem;
    height: 100%;
}

.stat-box.success {
    background: var(--success-bg);
    border-color: var(--success-color);
}

.stat-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    min-width: 30px;
}

.stat-box.success .stat-icon {
    color: var(--success-color);
}

.stat-info {
    flex: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.technical-info {
    background: var(--bg-tertiary);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.technical-info h6 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.technical-info .row {
    margin-bottom: 0.75rem;
}

.technical-info .row:last-child {
    margin-bottom: 0;
}

.result-actions {
    text-align: center;
    margin-bottom: 1.5rem;
}

.result-footer {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

/* Resolution Badge in Results */
.resolution-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: 2rem;
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.resolution-change {
    color: var(--warning-color);
    font-weight: 600;
}

.resolution-same {
    color: var(--success-color);
    font-weight: 600;
}

/* Processing State Enhancements */
.processing-details {
    background: var(--bg-tertiary);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-top: 1.5rem;
    text-align: left;
}

.processing-details h6 {
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.processing-detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.processing-detail-label {
    color: var(--text-secondary);
}

.processing-detail-value {
    color: var(--text-primary);
    font-weight: 600;
}

/* Footer */
.footer-section {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

.footer-brand h5 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-stats {
    text-align: right;
}

.stat {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Donation Styles */
.donation-btn {
    transition: all 0.3s ease;
    font-weight: 600;
}

.donation-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
}

/* Hero Donation Balanced */
.hero-donation-balanced {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.08) 0%, rgba(255, 193, 7, 0.03) 100%);
    border: 1px solid rgba(255, 193, 7, 0.2);
    border-radius: 1.5rem;
    padding: 2rem;
    transition: all 0.3s ease;
}

.hero-donation-balanced:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 193, 7, 0.3);
}

.donation-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.donation-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
}

.donation-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #dc3545 0%, #fd7e14 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    animation: heartbeat 2s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.donation-content h5 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.donation-subtitle {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.95rem;
}

.donation-right {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-shrink: 0;
}

.donation-benefits {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.benefit-item i {
    color: var(--success-color);
    font-size: 0.8rem;
}

.donation-cta-btn {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 2rem;
    transition: all 0.3s ease;
    animation: pulse 3s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 193, 7, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(255, 193, 7, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 193, 7, 0); }
}

.donation-cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 193, 7, 0.3);
}

/* Sidebar Donation Simplified */
.donation-card-sidebar-simple {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1) 0%, rgba(255, 193, 7, 0.05) 100%);
    border: 1px solid rgba(255, 193, 7, 0.2);
    border-radius: 1rem;
    padding: 1.25rem;
    text-align: center;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
}

.donation-card-sidebar-simple:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.donation-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.donation-header i {
    font-size: 1.25rem;
    animation: heartbeat 2s ease-in-out infinite;
}

.donation-header h6 {
    margin: 0;
    color: var(--text-primary);
}

.donation-card-sidebar-simple p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Theme Toggle */
#themeToggle {
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

#themeToggle:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* RESPONSIVE DESIGN - Mobile Optimizations */
@media (max-width: 992px) {
    .donation-container {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .donation-left {
        justify-content: center;
        text-align: center;
    }
    
    .donation-right {
        justify-content: center;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .donation-benefits {
        flex-direction: row;
        justify-content: center;
        gap: 1rem;
    }
    
    .info-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .main-content {
        padding: 2rem 0;
    }
    
    .compressor-card .card-body {
        padding: 1.5rem;
    }
    
    .upload-zone {
        padding: 2rem 1rem;
    }
    
    .upload-icon {
        font-size: 3rem;
    }
    
    .preset-grid {
        grid-template-columns: 1fr;
    }
    
    .resolution-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .feature-badge {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .footer-stats {
        text-align: left;
        margin-top: 1rem;
    }
    
    .hero-donation-balanced {
        padding: 1.5rem;
        margin-top: 3rem;
    }
    
    .donation-left {
        flex-direction: column;
        gap: 1rem;
    }
    
    .donation-benefits {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .donation-icon {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .result-header {
        flex-direction: column;
        text-align: center;
    }
    
    .result-actions .btn {
        display: block;
        width: 100%;
        margin: 0.5rem 0;
    }
    
    .stat-box {
        margin-bottom: 1rem;
    }
    
    .modal-dialog {
        margin: 1rem;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
    
    .feature-item {
        margin-bottom: 1rem;
    }
}

@media (max-width: 576px) {
    .upload-formats {
        gap: 0.25rem;
    }
    
    .format-badge {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }
    
    .file-meta {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .estimate-bar {
        flex-direction: column;
        gap: 1rem;
    }
    
    .estimate-arrow {
        transform: rotate(90deg);
        margin: 0;
    }
    
    .resolution-grid {
        grid-template-columns: 1fr;
    }
    
    .resolution-info .alert {
        padding: 0.75rem;
        font-size: 0.9rem;
    }
    
    .benefit-item {
        font-size: 0.8rem;
    }
    
    .donation-cta-btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .donation-btn {
        font-size: 0.8rem;
        padding: 0.375rem 0.75rem;
    }
    
    .accordion-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
}

/* Theme specific adjustments */
.light-theme .hero-donation-balanced {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.05) 0%, rgba(255, 193, 7, 0.02) 100%);
    border-color: rgba(255, 193, 7, 0.3);
}

.light-theme .donation-card-sidebar-simple {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.05) 0%, rgba(255, 193, 7, 0.02) 100%);
    border-color: rgba(255, 193, 7, 0.3);
}

.light-theme .resolution-info .alert {
    background: rgba(29, 161, 242, 0.05);
    border-color: rgba(29, 161, 242, 0.2);
}

.light-theme .resolution-card.active::after {
    border-color: var(--bg-primary);
}

/* Animations for new elements */
.resolution-card {
    animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Smooth transitions for theme switching */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}