/* CSS styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
}
:root {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary: #db2777;
    --dark-bg: #111827;
    --dark-bg-light: #1f2937;
    --light-text: #f9fafb;
    --light-text-secondary: #d1d5db;
    --card-bg: rgba(255, 255, 255, 0.03);
    --border-radius: 24px;
    --transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}
body.light {
    --dark-bg: #ffffff;
    --dark-bg-light: #f3f4f6;
    --light-text: #111827;
    --light-text-secondary: #4b5563;
    --card-bg: rgba(0, 0, 0, 0.03);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}
body {
    background: linear-gradient(145deg, var(--dark-bg) 0%, var(--dark-bg-light) 100%);
    color: var(--light-text);
    min-height: 100vh;
    padding: 0;
    line-height: 1.7;
    display: flex;
    flex-direction: column;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
}
.banner-ad {
    width: 90%;
    max-width: 728px;
    height: 90px;
    margin: 20px auto;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    text-align: center;
    line-height: 90px;
    color: white;
    border-radius: 12px;
    font-weight: bold;
}
header {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: top 0.3s ease;
    margin-bottom: 24px;
}
header.hidden {
    top: -100px;
}
.logo {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-icon {
    font-size: 2rem;
}
.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}
.menu-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.04);
    flex-wrap: wrap;
    justify-content: center;
}
.menu-item {
    padding: 12px 20px;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.25);
    color: var(--light-text);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    text-decoration: none;
}
.menu-item:hover {
    background: rgba(139, 92, 246, 0.15);
    transform: translateY(-2px);
}
.effects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.04);
}
.effect-btn {
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.25);
    color: var(--light-text);
    padding: 16px;
    border-radius: 16px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    text-align: center;
    min-height: 80px;
}
.effect-btn:hover {
    background: rgba(139, 92, 246, 0.15);
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(139, 92, 246, 0.3);
}
.effect-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-color: var(--primary);
    box-shadow: 0 8px 16px rgba(139, 92, 246, 0.4);
}
.effect-icon {
    font-size: 28px;
}
.upload-container {
    display: flex;
    gap: 36px;
    margin: 24px auto;
    justify-content: center;
    flex-wrap: wrap;
}
.upload-area, .music-upload-area {
    border: 2px dashed rgba(139, 92, 246, 0.35);
    border-radius: var(--border-radius);
    padding: 36px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(17, 24, 39, 0.25);
    width: 400px;
    box-shadow: var(--shadow);
    position: relative;
    max-width: 100%;
}
.upload-area:hover, .music-upload-area:hover {
    background: rgba(139, 92, 246, 0.08);
    border-color: var(--primary);
    transform: scale(1.02);
}
.upload-area.active, .music-upload-area.active {
    background: rgba(139, 92, 246, 0.12);
    border-color: var(--primary);
}
.upload-icon {
    font-size: 48px;
    margin-bottom: 16px;
    color: var(--primary);
}
.upload-text {
    font-size: 1.3rem;
    margin-bottom: 8px;
}
.upload-subtext {
    font-size: 1rem;
    opacity: 0.75;
}
.file-name {
    font-size: 0.9rem;
    margin-top: 10px;
    color: var(--primary);
    font-weight: 600;
    word-break: break-word;
}
.app-content {
    display: flex;
    gap: 36px;
    flex: 1;
    margin-bottom: 24px;
}
.settings-section {
    flex: 1;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.04);
}
.preview-section {
    flex: 2;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.04);
    display: flex;
    flex-direction: column;
}
.section-title {
    font-size: 1.3rem;
    margin-bottom: 24px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}
.section-title::before {
    content: "";
    display: block;
    width: 5px;
    height: 24px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    border-radius: 3px;
}
.preview-container {
    width: 100%;
    background: rgba(0, 0, 0, 0.25);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    flex: 1;
}
canvas {
    width: 100%;
    height: 100%;
    display: block;
}
.action-buttons {
    display: flex;
    gap: 16px;
    margin-top: 30px;
    flex-wrap: wrap;
}
.action-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    padding: 16px 24px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: var(--transition);
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    min-height: 48px;
}
.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px rgba(139, 92, 246, 0.45);
}
.action-btn:disabled {
    background: #6b7280;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    opacity: 0.7;
}
.action-btn.secondary {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
}
.action-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.action-btn.reset {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
    border: none;
}
.action-btn.convert {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}
.action-btn.download {
    background: linear-gradient(135deg, #22c55e 0%, #15803d 100%);
    color: white;
    border: none;
}
.progress-container {
    margin-top: 24px;
}
.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    overflow: hidden;
}
.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    width: 0%;
    transition: width 0.4s ease;
    border-radius: 4px;
}
.progress-text {
    font-size: 0.9rem;
    margin-top: 10px;
    text-align: center;
    color: var(--light-text-secondary);
}
.watermark-control {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 18px;
    padding: 14px 18px;
    background: rgba(17, 24, 39, 0.35);
    border-radius: 12px;
}
.watermark-text-control {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.watermark-position-control {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.watermark-style-control {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.watermark-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--light-text);
    font-size: 1rem;
    min-width: 200px;
}
.watermark-input::placeholder {
    color: var(--light-text-secondary);
}
.position-select {
    flex: 1;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--light-text);
    font-size: 1rem;
    min-width: 150px;
}
.style-select {
    flex: 1;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--light-text);
    font-size: 1rem;
    min-width: 150px;
}
.position-select option, .style-select option {
    background: var(--dark-bg-light);
    color: var(--light-text);
}
.switch {
    position: relative;
    display: inline-block;
    width: 56px;
    height: 28px;
    flex-shrink: 0;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #6b7280;
    transition: .4s;
    border-radius: 28px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}
input:checked + .slider:before {
    transform: translateX(28px);
}
.video-duration-control {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 18px;
    padding: 14px 18px;
    background: rgba(17, 24, 39, 0.35);
    border-radius: 10px;
    flex-wrap: wrap;
}
.music-control {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
    padding: 14px 18px;
    background: rgba(17, 24, 39, 0.35);
    border-radius: 10px;
    flex-wrap: wrap;
}
.effect-controls {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.04);
    margin-bottom: 24px;
}
.control-group {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 18px;
    flex-wrap: wrap;
}
.control-group label {
    font-size: 1rem;
    color: var(--light-text-secondary);
    min-width: 90px;
}
.control-group input[type="range"] {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.08);
    outline: none;
    -webkit-appearance: none;
    min-width: 150px;
}
.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}
.control-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}
.advanced-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 20px;
    padding: 20px;
    background: rgba(17, 24, 39, 0.35);
    border-radius: 12px;
}
.control-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}
.control-card-title {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}
.control-card-title::before {
    content: "⚙️";
    font-size: 1.2rem;
}
.color-controls {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}
.color-picker {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: var(--transition);
}
.color-picker:hover {
    transform: scale(1.1);
    border-color: var(--primary);
}
.preset-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.preset-btn {
    padding: 8px 12px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 8px;
    color: var(--light-text);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
    min-width: 70px;
}
.preset-btn:hover {
    background: rgba(139, 92, 246, 0.2);
    transform: translateY(-2px);
}
.preset-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-color: var(--primary);
}
footer {
    text-align: center;
    padding: 24px;
    opacity: 0.75;
    font-size: 1rem;
    color: var(--light-text-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.instructions {
    padding: 24px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    margin-top: 24px;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.04);
}
.instructions h2 {
    margin-bottom: 16px;
    color: var(--primary);
}
.instructions ol {
    padding-left: 24px;
}
.instructions li {
    margin-bottom: 12px;
}
/* Colored buttons */
[data-effect="glitch"] {
    background: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.3);
}
[data-effect="rain"] {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}
[data-effect="snow"] {
    background: rgba(243, 244, 246, 0.1);
    border-color: rgba(243, 244, 246, 0.3);
}
[data-effect="particle"] {
    background: rgba(234, 179, 8, 0.1);
    border-color: rgba(234, 179, 8, 0.3);
}
[data-effect="bubble"] {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
}
[data-effect="colorrain"] {
    background: rgba(249, 115, 22, 0.1);
    border-color: rgba(249, 115, 22, 0.3);
}
[data-effect="firefly"] {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
}
[data-effect="fireworks"] {
    background: rgba(220, 38, 38, 0.1);
    border-color: rgba(220, 38, 38, 0.3);
}
[data-effect="stars"] {
    background: rgba(250, 204, 21, 0.1);
    border-color: rgba(250, 204, 21, 0.3);
}
[data-effect="smoke"] {
    background: rgba(107, 114, 128, 0.1);
    border-color: rgba(107, 114, 128, 0.3);
}
[data-effect="confetti"] {
    background: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.3);
}
[data-effect="fire"] {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
}
[data-effect="pulse"] {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}
[data-effect="raindrop"] {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}
[data-effect="matrix"] {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
}
[data-effect="lensflare"] {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
}
[data-effect="vhs"] {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
}
[data-effect="mosaic"] {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
}
[data-effect="watercolor"] {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}
[data-effect="butterfly"] {
    background: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.3);
}
[data-effect="birds"] {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}
[data-effect="colorchange"] {
    background: rgba(249, 115, 22, 0.1);
    border-color: rgba(249, 115, 22, 0.3);
}
[data-effect="droplet"] {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
}
[data-effect="lightning"] {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
}
[data-effect="fade"] {
    background: rgba(107, 114, 128, 0.1);
    border-color: rgba(107, 114, 128, 0.3);
}
[data-effect="appear"] {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
}
[data-effect="colorpulse"] {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
}
[data-effect="starfly"] {
    background: rgba(250, 204, 21, 0.1);
    border-color: rgba(250, 204, 21, 0.3);
}
[data-effect="letterfly"] {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
}
[data-effect="dotfly"] {
    background: rgba(107, 114, 128, 0.1);
    border-color: rgba(107, 114, 128, 0.3);
}
/* Colorful Advanced Effect Controls */
.control-card {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(219, 39, 119, 0.1) 100%);
    border: 1px solid rgba(139, 92, 246, 0.3);
}
.control-card-title {
    color: var(--primary);
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.control-group label {
    color: var(--primary);
}
.preset-btn {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(219, 39, 119, 0.1) 100%);
    border-color: var(--primary);
}
.preset-btn:hover {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(219, 39, 119, 0.2) 100%);
}
.preset-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}
 
/* Mobile responsive styles */
@media (max-width: 1024px) {
    .container {
        padding: 20px;
    }
    .effects-grid {
        grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    }
    .upload-area, .music-upload-area {
        padding: 28px;
    }
}
@media (max-width: 768px) {
    .container {
        padding: 16px;
    }
    .app-content {
        flex-direction: column;
        gap: 24px;
    }
    .settings-section, .preview-section {
        min-width: 100%;
        padding: 20px;
    }
    .action-buttons {
        flex-direction: column;
        gap: 12px;
    }
    .upload-container {
        flex-direction: column;
        gap: 16px;
        margin: 16px auto;
    }
    .upload-area, .music-upload-area {
        width: 100%;
        padding: 20px;
    }
    .upload-icon {
        font-size: 36px;
        margin-bottom: 12px;
    }
    .upload-text {
        font-size: 1rem;
        margin-bottom: 6px;
    }
    .upload-subtext {
        font-size: 0.8rem;
    }
    .effects-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 12px;
        padding: 16px;
    }
    .preview-container {
        height: auto !important;
    }
    canvas {
        height: auto !important;
    }
    .menu-bar {
        flex-wrap: wrap;
        gap: 12px;
        padding: 12px;
        justify-content: center;
    }
    .advanced-controls {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 12px;
    }
    .header-controls {
        flex-direction: column;
        gap: 10px;
    }
    .banner-ad {
        height: 70px;
        line-height: 70px;
        font-size: 0.9rem;
    }
    .logo {
        font-size: 1.6rem;
    }
    .section-title {
        font-size: 1.2rem;
    }
    .effect-btn {
        padding: 12px;
        font-size: 0.85rem;
        min-height: 70px;
    }
    .effect-icon {
        font-size: 24px;
    }
}
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    .upload-container {
        flex-direction: column;
        gap: 12px;
    }
    .upload-area, .music-upload-area {
        width: 100%;
        padding: 16px;
    }
    .logo {
        font-size: 1.5rem;
    }
    .effects-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 8px;
    }
    .menu-item {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    .advanced-controls {
        grid-template-columns: 1fr;
    }
    .banner-ad {
        height: 50px;
        line-height: 50px;
        font-size: 0.8rem;
    }
    .action-btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    .section-title {
        font-size: 1.1rem;
    }
    .control-group label {
        min-width: 80px;
        font-size: 0.9rem;
    }
    .preset-btn {
        font-size: 0.8rem;
        padding: 6px 10px;
    }
    .instructions li {
        font-size: 0.9rem;
    }
    footer {
        font-size: 0.9rem;
        padding: 16px;
    }
}