/* ============================================
   FILE CONVERTER - 2026 MODERN DESIGN
   Glassmorphism + Aurora + Micro-animations
   ============================================ */

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

:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --secondary: #a855f7;
    --accent: #06b6d4;
    --success: #10b981;
    --error: #ef4444;
    --dark: #0a0a0f;
    --dark-light: #12121a;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover: rgba(255, 255, 255, 0.06);
    --text: #f4f4f5;
    --text-muted: #a1a1aa;
    --text-dim: #71717a;
}

body {
    font-family: 'Rubik', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--dark);
    min-height: 100vh;
    color: var(--text);
    padding: 40px 20px;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   ANIMATED BACKGROUND - MESH GRADIENT
   ============================================ */

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(at 40% 20%, rgba(99, 102, 241, 0.3) 0px, transparent 50%),
        radial-gradient(at 80% 0%, rgba(124, 58, 237, 0.25) 0px, transparent 50%),
        radial-gradient(at 0% 50%, rgba(6, 182, 212, 0.2) 0px, transparent 50%),
        radial-gradient(at 80% 50%, rgba(236, 72, 153, 0.15) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(16, 185, 129, 0.2) 0px, transparent 50%),
        radial-gradient(at 80% 100%, rgba(245, 158, 11, 0.15) 0px, transparent 50%),
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.2) 0px, transparent 50%);
    pointer-events: none;
    z-index: -2;
    animation: meshMove 20s ease-in-out infinite;
}

@keyframes meshMove {
    0%, 100% {
        filter: hue-rotate(0deg) blur(0px);
        transform: scale(1);
    }
    25% {
        filter: hue-rotate(15deg) blur(0px);
        transform: scale(1.02);
    }
    50% {
        filter: hue-rotate(-10deg) blur(0px);
        transform: scale(1);
    }
    75% {
        filter: hue-rotate(20deg) blur(0px);
        transform: scale(1.01);
    }
}

/* Animated Grid Pattern */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
    animation: gridMove 30s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* ============================================
   CONTAINER & HEADER
   ============================================ */

.container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.header {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInDown 0.8s ease-out;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.header-main {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 16px;
}

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

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    background-size: 200% 200%;
    border-radius: 18px;
    font-size: 28px;
    box-shadow:
        0 15px 40px rgba(99, 102, 241, 0.4),
        0 0 60px rgba(168, 85, 247, 0.2);
    animation: logoGlow 3s ease-in-out infinite, gradientShift 5s ease infinite;
    position: relative;
    flex-shrink: 0;
}

.logo::before {
    content: '';
    position: absolute;
    inset: -3px;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    border-radius: 26px;
    z-index: -1;
    filter: blur(15px);
    opacity: 0.6;
    animation: gradientShift 5s ease infinite;
}

@keyframes logoGlow {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, var(--primary-light) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
    margin: 0;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 400;
    opacity: 0.8;
}

/* ============================================
   TABS - GLASSMORPHISM STYLE
   ============================================ */

.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 35px;
    background: var(--glass);
    padding: 8px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

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

.tab-btn {
    flex: 1;
    padding: 16px 24px;
    border: none;
    background: transparent;
    color: var(--text-dim);
    cursor: pointer;
    border-radius: 14px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    font-size: 0.95rem;
    font-weight: 500;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.tab-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity 0.4s ease;
    border-radius: 14px;
}

.tab-btn:hover {
    color: var(--text);
    transform: translateY(-2px);
}

.tab-btn:hover::before {
    opacity: 0.1;
}

.tab-btn.active {
    color: #fff;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    position: relative;
    z-index: 1;
}

.tab-btn.active::before {
    opacity: 1;
    z-index: -1;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 14px;
    z-index: -1;
    box-shadow:
        0 8px 30px rgba(99, 102, 241, 0.4),
        0 0 50px rgba(99, 102, 241, 0.2);
}

/* ============================================
   TAB CONTENT - GLASS CARD
   ============================================ */

.tab-content {
    display: none;
    background: var(--glass);
    border-radius: 28px;
    padding: 40px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    animation: cardAppear 0.5s ease-out;
    position: relative;
    overflow: hidden;
}

.tab-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.tab-content.active {
    display: block;
}

/* ============================================
   DROP ZONE - INTERACTIVE AREA
   ============================================ */

.drop-zone {
    border: 2px dashed rgba(99, 102, 241, 0.3);
    border-radius: 24px;
    padding: 50px 30px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    cursor: pointer;
    margin-bottom: 30px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.02) 0%, rgba(168, 85, 247, 0.02) 100%);
    position: relative;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.drop-zone.has-video-preview {
    padding: 0;
    border-style: solid;
    border-color: rgba(99, 102, 241, 0.4);
    background: #000;
    cursor: default;
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.drop-zone:hover, .drop-zone.drag-over {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(168, 85, 247, 0.05) 100%);
    transform: scale(1.01);
    box-shadow:
        0 0 40px rgba(99, 102, 241, 0.15),
        inset 0 0 60px rgba(99, 102, 241, 0.05);
}

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

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    position: relative;
    z-index: 1;
}

.drop-zone-icon {
    color: var(--primary);
    opacity: 0.7;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.3));
}

.drop-zone:hover .drop-zone-icon {
    opacity: 1;
    transform: translateY(-8px) scale(1.1);
    filter: drop-shadow(0 0 30px rgba(99, 102, 241, 0.5));
}

.drop-zone-text {
    font-size: 1.1rem;
    color: var(--text);
    font-weight: 500;
}

.drop-zone-hint {
    font-size: 0.85rem;
    color: var(--text-dim);
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 20px;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.file-input {
    display: none;
}

/* ============================================
   OPTIONS - MODERN FORM CONTROLS
   ============================================ */

.options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-bottom: 30px;
}

@media (max-width: 900px) {
    .options {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .options {
        grid-template-columns: 1fr;
    }
}

.option-group {
    background: rgba(0, 0, 0, 0.3);
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.option-group:hover {
    background: rgba(0, 0, 0, 0.4);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.option-group label {
    display: block;
    margin-bottom: 12px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.option-group select,
.option-group input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    background: rgba(15, 15, 25, 0.9);
    color: var(--text);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.3s ease;
    appearance: none;
    cursor: pointer;
}

.option-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a1a1aa' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: left 14px center;
    padding-left: 16px;
}

.option-group select:focus,
.option-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow:
        0 0 0 3px rgba(99, 102, 241, 0.15),
        0 0 20px rgba(99, 102, 241, 0.1);
}

.option-group select option {
    background: var(--dark-light);
    padding: 12px;
}

/* ============================================
   TRIM CONTROLS
   ============================================ */

.trim-controls {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--glass-border);
}

.trim-time-inputs {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 20px;
}

.trim-time-group {
    flex: 1;
    max-width: 200px;
}

.trim-time-group label {
    display: block;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 10px;
    text-align: center;
}

.trim-time-input {
    display: flex;
    gap: 8px;
}

.trim-time-input input {
    flex: 1;
    background: rgba(15, 15, 25, 0.9);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px;
    color: var(--text);
    font-size: 1.2rem;
    font-family: 'Courier New', monospace;
    text-align: center;
    transition: all 0.3s ease;
}

.trim-time-input input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.trim-time-input input::placeholder {
    color: var(--text-dim);
    opacity: 0.5;
}

.trim-set-btn {
    width: 48px;
    height: 48px;
    border: 1px solid var(--glass-border);
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.trim-set-btn:hover {
    background: rgba(99, 102, 241, 0.3);
    border-color: var(--primary);
    transform: scale(1.05);
}

.trim-duration-display {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    padding-top: 16px;
    border-top: 1px solid var(--glass-border);
}

.trim-duration-display span:last-child {
    color: var(--accent);
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

.preview-duration {
    font-size: 0.85rem;
    color: var(--accent);
    margin-top: 4px;
}

@media (max-width: 600px) {
    .trim-time-inputs {
        flex-direction: column;
        align-items: center;
    }

    .trim-time-group {
        width: 100%;
        max-width: none;
    }
}

/* Range Slider - Modern Style */
.option-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    appearance: none;
    cursor: pointer;
    position: relative;
}

.option-group input[type="range"]::-webkit-slider-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    height: 8px;
}

.option-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    cursor: pointer;
    box-shadow:
        0 4px 15px rgba(99, 102, 241, 0.5),
        0 0 30px rgba(99, 102, 241, 0.3);
    transition: all 0.3s ease;
}

.option-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow:
        0 6px 20px rgba(99, 102, 241, 0.6),
        0 0 40px rgba(99, 102, 241, 0.4);
}

/* ============================================
   BUTTONS - GLOW EFFECTS
   ============================================ */

.btn {
    padding: 16px 36px;
    border: none;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow:
        0 8px 30px rgba(99, 102, 241, 0.35),
        0 0 50px rgba(99, 102, 241, 0.15);
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px) scale(1.02);
    box-shadow:
        0 15px 40px rgba(99, 102, 241, 0.45),
        0 0 80px rgba(99, 102, 241, 0.25);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(-1px) scale(1);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-download {
    background: linear-gradient(135deg, var(--success), #34d399);
    color: #fff;
    box-shadow:
        0 8px 30px rgba(16, 185, 129, 0.35),
        0 0 50px rgba(16, 185, 129, 0.15);
}

.btn-download:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow:
        0 15px 40px rgba(16, 185, 129, 0.45),
        0 0 80px rgba(16, 185, 129, 0.25);
}

/* ============================================
   PROGRESS BAR - ANIMATED
   ============================================ */

.progress-container {
    margin: 30px 0;
    display: none;
}

.progress-bar {
    height: 10px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    background-size: 200% 100%;
    width: 0%;
    border-radius: 10px;
    transition: width 0.3s ease;
    animation: progressShine 2s linear infinite;
    position: relative;
}

.progress-fill::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 1.5s infinite;
}

@keyframes progressShine {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

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

.progress-text {
    text-align: center;
    margin-top: 14px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ============================================
   FILE INFO & RESULTS
   ============================================ */

.file-info {
    background: rgba(0, 0, 0, 0.3);
    padding: 20px;
    border-radius: 16px;
    margin-bottom: 25px;
    display: none;
    border: 1px solid var(--glass-border);
}

.file-info-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
}

.file-info-item:last-child {
    border-bottom: none;
}

.file-info-item span:first-child {
    color: var(--text-dim);
}

.result {
    margin-top: 30px;
    padding: 28px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(16, 185, 129, 0.05) 100%);
    border-radius: 20px;
    border: 1px solid rgba(16, 185, 129, 0.25);
    display: none;
    animation: resultAppear 0.5s ease-out;
    position: relative;
    overflow: hidden;
}

.result::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--success), #34d399, var(--accent));
}

@keyframes resultAppear {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result p:first-child {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.error {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.05) 100%);
    border-color: rgba(239, 68, 68, 0.25);
}

.error::before {
    background: linear-gradient(90deg, var(--error), #f87171);
}

.error p {
    color: #f87171;
}

/* ============================================
   LOADING SPINNER
   ============================================ */

.loading-spinner {
    display: inline-block;
    width: 28px;
    height: 28px;
    border: 3px solid rgba(99, 102, 241, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 0.8s linear infinite;
}

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

.ffmpeg-loading {
    text-align: center;
    padding: 50px;
}

.ffmpeg-loading p {
    margin-top: 18px;
    color: var(--text-muted);
}

.ffmpeg-loading p:last-child {
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* ============================================
   PREVIEW STYLES
   ============================================ */

.file-preview {
    display: flex;
    align-items: center;
    gap: 24px;
    width: 100%;
    padding: 12px;
}

/* Media preview - full width video */
.file-preview.media-preview-full {
    flex-direction: column;
    padding: 0;
    position: relative;
}

.file-preview.media-preview-full .preview-media-container {
    width: 100%;
}

.file-preview.media-preview-full .preview-media-container video {
    width: 100%;
    max-width: 100%;
    max-height: 280px;
    border-radius: 20px;
    object-fit: contain;
    background: #000;
    cursor: default;
}

.file-preview.media-preview-full .preview-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 20px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    border-radius: 0 0 20px 20px;
    pointer-events: none;
}

.file-preview.media-preview-full .preview-name {
    color: #fff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.file-preview.media-preview-full .preview-remove {
    top: 12px;
    left: 12px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.file-preview.media-preview-full .preview-remove:hover {
    background: rgba(239, 68, 68, 0.9);
    border-color: transparent;
}

.preview-media-container {
    flex-shrink: 0;
}

.preview-media-container video {
    max-width: 300px;
    max-height: 170px;
    border-radius: 16px;
    background: #000;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.preview-media-container audio {
    width: 260px;
}

.pdf-preview-container {
    flex-shrink: 0;
}

.pdf-preview-container canvas {
    max-width: 130px;
    max-height: 170px;
    border-radius: 12px;
    box-shadow:
        0 10px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(99, 102, 241, 0.1);
}

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

.preview-name {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
    word-break: break-word;
    font-size: 1rem;
}

.preview-size, .preview-pages {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.preview-remove {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.4rem;
    line-height: 1;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.preview-remove:hover {
    background: rgba(239, 68, 68, 0.3);
    transform: scale(1.1) rotate(90deg);
}

/* ============================================
   IMAGE GRID PREVIEW
   ============================================ */

.image-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}

.image-preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 16px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.image-preview-item:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--primary);
}

.image-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.image-preview-item:hover img {
    transform: scale(1.1);
}

.image-preview-item .remove-btn {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 26px;
    height: 26px;
    border: none;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    opacity: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
}

.image-preview-item:hover .remove-btn {
    opacity: 1;
}

.image-preview-item .remove-btn:hover {
    background: rgba(239, 68, 68, 0.9);
    transform: scale(1.1);
}

.image-preview-item .image-order {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* ============================================
   MULTI-FILE LIST
   ============================================ */

.multi-file-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.multi-file-list::-webkit-scrollbar {
    width: 6px;
}

.multi-file-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 3px;
}

.multi-file-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.multi-file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background: rgba(0, 0, 0, 0.25);
    border-radius: 12px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.multi-file-item:hover {
    background: rgba(0, 0, 0, 0.35);
    border-color: rgba(99, 102, 241, 0.3);
}

.multi-file-item .remove-btn {
    background: rgba(239, 68, 68, 0.15);
    border: none;
    color: #f87171;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.multi-file-item .remove-btn:hover {
    background: rgba(239, 68, 68, 0.3);
    transform: scale(1.1);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 600px) {
    body {
        padding: 20px 15px;
    }

    .header {
        margin-bottom: 40px;
    }

    .header-main {
        gap: 14px;
    }

    .logo {
        width: 48px;
        height: 48px;
        font-size: 22px;
        border-radius: 14px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .file-preview.media-preview-full .preview-media-container video {
        max-height: 200px;
    }

    .tabs {
        flex-direction: column;
        gap: 6px;
    }

    .tab-btn {
        padding: 14px 18px;
    }

    .tab-content {
        padding: 28px 22px;
        border-radius: 22px;
    }

    .drop-zone {
        padding: 40px 20px;
        min-height: 180px;
        border-radius: 20px;
    }

    .file-preview {
        flex-direction: column;
        text-align: center;
    }

    .preview-remove {
        top: 10px;
        left: 10px;
    }

    .options {
        grid-template-columns: 1fr !important;
    }

    .btn {
        width: 100%;
        padding: 16px 24px;
    }
}

/* ============================================
   DARK SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark);
}

::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.5);
}

/* ============================================
   SELECTION
   ============================================ */

::selection {
    background: rgba(99, 102, 241, 0.4);
    color: #fff;
}

/* ============================================
   DOWNLOAD MODAL
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: linear-gradient(135deg, rgba(20, 20, 30, 0.95) 0%, rgba(15, 15, 25, 0.98) 100%);
    border-radius: 28px;
    padding: 40px;
    max-width: 420px;
    width: 90%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 25px 80px rgba(0, 0, 0, 0.5),
        0 0 100px rgba(99, 102, 241, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: scale(0.9) translateY(20px);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.modal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--success), #34d399, var(--accent));
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--success), #34d399);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 40px;
    box-shadow:
        0 15px 40px rgba(16, 185, 129, 0.4),
        0 0 60px rgba(16, 185, 129, 0.2);
    animation: successPulse 2s ease-in-out infinite;
}

@keyframes successPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 15px 40px rgba(16, 185, 129, 0.4), 0 0 60px rgba(16, 185, 129, 0.2); }
    50% { transform: scale(1.05); box-shadow: 0 20px 50px rgba(16, 185, 129, 0.5), 0 0 80px rgba(16, 185, 129, 0.3); }
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}

.modal-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 28px;
}

.modal-stats {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 28px;
}

.modal-stat {
    background: rgba(255, 255, 255, 0.05);
    padding: 16px 24px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    flex: 1;
}

.modal-stat-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.modal-stat-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modal-stat.highlight {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(16, 185, 129, 0.05));
    border-color: rgba(16, 185, 129, 0.3);
}

.modal-stat.highlight .modal-stat-value {
    color: #34d399;
}

.modal-buttons {
    display: flex;
    gap: 12px;
}

.modal-buttons .btn {
    flex: 1;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text);
}

.modal-close {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text);
    transform: rotate(90deg);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    margin-top: 80px;
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

.stats-bar {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 20px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    color: var(--text-dim);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-value {
    color: var(--primary-light);
    font-size: 1.2rem;
    font-weight: 600;
}

.footer p {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.footer-actions {
    margin-bottom: 20px;
}

.btn-text {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: underline;
    transition: color 0.3s ease;
}

.btn-text:hover {
    color: var(--primary-light);
}

@media (max-width: 600px) {
    .stats-bar {
        flex-direction: column;
        gap: 20px;
    }
}