/* ========================================
   Stop Challenge Video Maker - Styles
   Modern Glassmorphism Design
   ======================================== */

/* CSS Variables / Design Tokens */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-hover: rgba(255, 255, 255, 0.08);

    /* Accent Colors */
    --accent-primary: #00d4ff;
    --accent-secondary: #7c3aed;
    --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --accent-gradient-hover: linear-gradient(135deg, #00e5ff 0%, #8b5cf6 100%);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.4);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image:
        radial-gradient(ellipse at 20% 20%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: var(--spacing-md);
    gap: var(--spacing-lg);
}

/* Header */
.app-header {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: var(--spacing-xs);
}

/* Main Content Layout */
.main-content {
    display: flex;
    gap: var(--spacing-xl);
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    align-items: flex-start;
    /* Important for sticky to work */
}

/* Control Panel (Left Sidebar) */
.control-panel {
    width: 360px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.panel-section {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
}

.panel-section:hover {
    background: var(--glass-hover);
    border-color: rgba(255, 255, 255, 0.15);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-icon {
    font-size: 1.2rem;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.05);
}

.upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.upload-icon {
    font-size: 2.5rem;
    opacity: 0.8;
}

.upload-placeholder p {
    color: var(--text-secondary);
    font-weight: 500;
}

.upload-hint {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.upload-preview {
    position: relative;
}

.upload-preview img {
    max-width: 100%;
    max-height: 120px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.btn-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: #ef4444;
    color: white;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.btn-remove:hover {
    background: #dc2626;
    transform: scale(1.1);
}

/* Cutout Background Options */
.cutout-options {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.cutout-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cutout-option input {
    display: none;
}

.option-box {
    width: 50px;
    height: 50px;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: var(--transition-normal);
}

.black-option {
    background: #000000;
}

.image-option {
    background: var(--glass-bg);
}

.cutout-option input:checked~.option-box {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.cutout-option input:checked~span:last-child {
    color: var(--accent-primary);
}

.cutout-image-upload {
    margin-top: var(--spacing-sm);
}

.upload-area.small {
    padding: var(--spacing-md);
}

.upload-area.small .upload-placeholder {
    gap: var(--spacing-xs);
}

.upload-area.small .upload-icon {
    font-size: 1.5rem;
}

.upload-area.small p {
    font-size: 0.85rem;
}

.upload-area.small .upload-preview img {
    max-height: 80px;
}

.cutout-zoom-control {
    margin-top: var(--spacing-md);
}

/* Shape Grid */
.shape-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.shape-btn {
    aspect-ratio: 1;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.shape-btn svg {
    width: 28px;
    height: 28px;
}

.shape-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.1);
}

.shape-btn.active {
    border-color: var(--accent-primary);
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

/* Animation Grid */
.animation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.animation-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-sm);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-normal);
    font-size: 0.85rem;
}

.animation-btn .anim-icon {
    font-size: 1.3rem;
}

.animation-btn:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    background: rgba(0, 212, 255, 0.1);
}

.animation-btn.active {
    border-color: var(--accent-primary);
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

/* Settings */
.settings-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.settings-group:last-child {
    margin-bottom: 0;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.setting-value {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.85rem;
}

/* Custom Slider */
.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-gradient);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: var(--shadow-glow);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-gradient);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-tertiary);
    border-radius: 26px;
    transition: var(--transition-normal);
}

.toggle-slider::before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-normal);
}

.toggle input:checked+.toggle-slider {
    background: var(--accent-gradient);
}

.toggle input:checked+.toggle-slider::before {
    transform: translateX(22px);
}

/* Preview Section */
.preview-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    position: sticky;
    top: var(--spacing-md);
    height: fit-content;
    align-self: flex-start;
}

.canvas-wrapper {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

#previewCanvas {
    display: block;
    border-radius: var(--radius-lg);
    background: #1a1a25;
    max-height: 70vh;
    width: auto;
}

.canvas-overlay {
    position: absolute;
    inset: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    border-radius: var(--radius-lg);
    color: var(--text-muted);
    font-size: 1.1rem;
    pointer-events: none;
}

.cutout-hint {
    position: absolute;
    bottom: calc(var(--spacing-md) + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Playback Controls */
.playback-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    width: 100%;
    max-width: 500px;
}

.control-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.control-btn:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 212, 255, 0.1);
}

.control-btn.primary {
    background: var(--accent-gradient);
    border: none;
    width: 52px;
    height: 52px;
    box-shadow: var(--shadow-glow);
}

.control-btn.primary:hover {
    transform: scale(1.05);
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent-gradient);
    border-radius: 3px;
    transition: width 0.1s linear;
}

.time-display {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-variant-numeric: tabular-nums;
    min-width: 80px;
    text-align: right;
}

/* Export Section */
.export-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    max-width: 500px;
}

.btn-export {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-glow);
}

.btn-export:hover:not(:disabled) {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
}

.btn-export:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

.export-icon {
    font-size: 1.3rem;
}

.export-progress {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.progress-fill-export {
    height: 100%;
    width: 0%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width 0.2s ease;
}

#exportStatus {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
    }

    .control-panel {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .panel-section {
        flex: 1;
        min-width: 280px;
    }

    #previewCanvas {
        max-height: 50vh;
    }
}

@media (max-width: 640px) {
    .app-container {
        padding: var(--spacing-sm);
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .control-panel {
        flex-direction: column;
    }

    .panel-section {
        min-width: 100%;
    }

    .shape-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .animation-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .animation-btn span:last-child {
        display: none;
    }

    .playback-controls {
        flex-wrap: wrap;
        justify-content: center;
    }

    .progress-bar {
        order: 3;
        width: 100%;
    }

    .time-display {
        order: 4;
    }
}

/* Animations for UI elements */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }

    100% {
        background-position: 200% 0;
    }
}

.loading {
    background: linear-gradient(90deg,
            var(--bg-tertiary) 0%,
            var(--glass-bg) 50%,
            var(--bg-tertiary) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}