/* ============================================
   Video Sprite - Modern Sophisticated Theme
   Raycast-inspired Design with Gradient Shapes
   ============================================ */

:root {
    /* Colors */
    --bg-primary: #000000;
    --bg-secondary: rgba(20, 20, 20, 0.85);
    --bg-tertiary: rgba(30, 30, 30, 0.9);
    --bg-glass: rgba(30, 30, 30, 0.6);

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

    --accent-primary: #ffffff;
    --accent-secondary: rgba(255, 255, 255, 0.8);
    --accent-glow: rgba(255, 255, 255, 0.1);

    /* Shape colors */
    --shape-red: #ff3366;
    --shape-pink: #ff6699;
    --shape-coral: #ff4466;
    --shape-dark-red: #cc2244;
    --shape-cyan: #00cccc;

    --success: #4ade80;
    --warning: #fbbf24;
    --error: #f87171;

    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(255, 255, 255, 0.25);

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

    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   Three.js Particle Background
   ============================================ */
#particleBackground {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#particleBackground canvas {
    display: block;
}

/* Overlay for better text readability */
.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(ellipse at center,
            transparent 0%,
            rgba(0, 0, 0, 0.3) 70%,
            rgba(0, 0, 0, 0.6) 100%);
}

/* ============================================
   App Container
   ============================================ */
.app {
    position: relative;
    z-index: 20;
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem;
    min-height: 100vh;
}

/* ============================================
   Animations
   ============================================ */
@keyframes blurIn {
    from {
        opacity: 0;
        filter: blur(10px);
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        filter: blur(0);
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes wordReveal {
    from {
        opacity: 0;
        filter: blur(8px);
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        filter: blur(0);
        transform: translateY(0);
    }
}

.blur-in {
    animation: blurIn 0.8s var(--transition-slow) forwards;
    opacity: 0;
}

.blur-in-delay-1 {
    animation-delay: 0.1s;
}

.blur-in-delay-2 {
    animation-delay: 0.2s;
}

.blur-in-delay-3 {
    animation-delay: 0.3s;
}

.blur-in-delay-4 {
    animation-delay: 0.4s;
}

.blur-in-delay-5 {
    animation-delay: 0.5s;
}

.fade-in-up {
    animation: fadeInUp 0.6s var(--transition-slow) forwards;
    opacity: 0;
}

/* Split text animation */
.split-text .word {
    display: inline-block;
    opacity: 0;
    animation: wordReveal 0.5s ease forwards;
}

/* ============================================
   Header
   ============================================ */
.header {
    text-align: center;
    margin-bottom: 4rem;
    padding-top: 2rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 4.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo-icon {
    font-size: 2rem;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* ============================================
   Drop Zone - Glassmorphism
   ============================================ */
.drop-zone {
    background: var(--bg-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
            rgba(255, 255, 255, 0.05) 0%,
            transparent 50%,
            rgba(255, 255, 255, 0.02) 100%);
    pointer-events: none;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--border-focus);
    background: rgba(40, 40, 40, 0.7);
    transform: translateY(-2px);
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

.drop-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    filter: grayscale(0.3);
}

.drop-text {
    font-size: 1.35rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.drop-subtext {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.file-btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.95rem;
    letter-spacing: 0.01em;
}

.file-btn:hover {
    background: var(--text-secondary);
    transform: scale(1.02);
}

.drop-formats {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 1.5rem;
    letter-spacing: 0.02em;
}

/* ============================================
   Video Info Card
   ============================================ */
.video-info {
    background: var(--bg-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.video-info video {
    width: 180px;
    height: auto;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
}

.video-meta {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    align-items: center;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.meta-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.meta-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.clear-btn {
    margin-left: auto;
    padding: 0.6rem 1.2rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.85rem;
}

.clear-btn:hover {
    border-color: var(--error);
    color: var(--error);
    background: rgba(248, 113, 113, 0.1);
}

/* ============================================
   Settings Panel
   ============================================ */
.settings-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.frame-count {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--bg-primary);
    background: var(--text-primary);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    text-transform: none;
    letter-spacing: 0;
}

.setting-group {
    margin-bottom: 1.5rem;
}

.setting-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

/* Radio & Checkbox - Modern Pills */
.radio-group,
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.radio-option,
.checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.65rem 1.25rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.radio-option:hover,
.checkbox-option:hover {
    border-color: var(--border-focus);
    background: rgba(50, 50, 50, 0.9);
}

.radio-option input,
.checkbox-option input {
    display: none;
}

.radio-custom,
.checkbox-custom {
    width: 16px;
    height: 16px;
    border: 2px solid var(--text-muted);
    background: transparent;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.radio-custom {
    border-radius: 50%;
}

.checkbox-custom {
    border-radius: 4px;
}

.radio-option input:checked~.radio-custom {
    border-color: var(--text-primary);
    background: var(--text-primary);
    box-shadow: inset 0 0 0 3px var(--bg-tertiary);
}

.radio-option:has(input:checked),
.checkbox-option:has(input:checked) {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.checkbox-option input:checked~.checkbox-custom {
    border-color: var(--text-primary);
    background: var(--text-primary);
}

.checkbox-option input:checked~.checkbox-custom::after {
    content: '✓';
    font-size: 10px;
    color: var(--bg-primary);
    font-weight: bold;
}

/* Setting Rows */
.setting-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.setting-item {
    flex: 1;
    min-width: 140px;
}

.setting-item.full-width {
    flex: 100%;
}

/* Input Fields - Modern */
.input-field,
.select-field {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.input-field:focus,
.select-field:focus {
    outline: none;
    border-color: var(--border-focus);
    background: rgba(50, 50, 50, 0.9);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.05);
}

.input-field::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.select-field {
    cursor: pointer;
}

/* Range Slider - Modern */
.range-slider {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    appearance: none;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.range-slider::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Buttons
   ============================================ */
.actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.01em;
}

/* Trim Path Animation - CSS Houdini @property for gradient animation */
@property --trim-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

/* Trim Path Animation Variables */
.btn-primary {
    /* === CUSTOMIZABLE SETTINGS === */
    --trim-color: #e23500;
    /* Border/glow color */
    --trim-speed: 2s;
    /* Animation duration */
    --trim-thickness: 2px;
    /* Line thickness */
    --trim-glow-intensity: 25px;
    /* Glow blur */
    --trim-glow-spread: 5px;
    /* Glow spread */
    --trim-easing: ease-in-out;
    /* Easing: linear, ease, ease-in-out, cubic-bezier(...) */
    --trim-offset: 0px;
    /* Position: 0=inside, 4=center, 8+=outside */

    /* Button styling - White */
    background: var(--text-primary);
    color: var(--bg-primary);
    flex: 1;
    position: relative;
    z-index: 1;
}

/* Animated rotating border - Behind the button */
.btn-primary::before {
    content: '';
    position: absolute;
    /* Trim path is slightly larger than button by thickness + gap */
    inset: calc(-1 * (var(--trim-thickness) + var(--trim-offset)));
    z-index: -1;
    background: conic-gradient(from var(--trim-angle),
            transparent 0deg,
            transparent 30deg,
            var(--trim-color) 60deg,
            var(--trim-color) 120deg,
            transparent 150deg,
            transparent 360deg);
    border-radius: calc(var(--radius-md) + var(--trim-thickness) + var(--trim-offset));
    animation: trimPathAngle var(--trim-speed) var(--trim-easing) infinite;
    /* Stroke mask effect */
    mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    mask-composite: exclude;
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    padding: var(--trim-thickness);
}

/* Deep Glow effect - Behind the button */
.btn-primary::after {
    content: '';
    position: absolute;
    inset: calc(-1 * var(--trim-offset) - var(--trim-thickness));
    z-index: -2;
    border-radius: calc(var(--radius-md) + var(--trim-offset) + var(--trim-thickness));
    background: transparent;
    box-shadow:
        0 0 var(--trim-glow-intensity) var(--trim-glow-spread) color-mix(in srgb, var(--trim-color) 50%, transparent),
        0 0 calc(var(--trim-glow-intensity) * 2) calc(var(--trim-glow-spread) * 1.5) color-mix(in srgb, var(--trim-color) 30%, transparent),
        0 0 calc(var(--trim-glow-intensity) * 3) calc(var(--trim-glow-spread) * 2) color-mix(in srgb, var(--trim-color) 15%, transparent);
    opacity: 0.8;
}

@keyframes trimPathAngle {
    from {
        --trim-angle: 0deg;
    }

    to {
        --trim-angle: 360deg;
    }
}

.btn-primary:hover:not(:disabled) {
    --trim-glow-intensity: 25px;
    --trim-glow-spread: 10px;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

.btn-secondary:hover {
    background: rgba(50, 50, 50, 0.9);
    border-color: var(--border-focus);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
    background: var(--accent-glow);
}

.btn-download {
    background: var(--text-primary);
    color: var(--bg-primary);
    width: 100%;
    margin-top: 1rem;
}

.btn-download:hover {
    filter: brightness(0.95);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.15);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ============================================
   Progress Section
   ============================================ */
.progress-section {
    background: var(--bg-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.progress-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-percent {
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.progress-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--text-primary);
    border-radius: 2px;
    transition: width var(--transition-fast);
}

.progress-log {
    margin-top: 1.5rem;
    max-height: 140px;
    overflow-y: auto;
    font-size: 0.75rem;
    font-family: 'SF Mono', 'Monaco', 'Menlo', monospace;
    color: var(--text-muted);
    line-height: 1.9;
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.progress-log p {
    margin: 0;
}

/* ============================================
   Results Section
   ============================================ */
.results-section {
    background: var(--bg-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.frames-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.frame-thumb {
    position: relative;
    aspect-ratio: 16/9;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
}

.frame-thumb:hover {
    transform: scale(1.03);
    border-color: var(--border-focus);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.frame-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.frame-thumb .timestamp {
    position: absolute;
    bottom: 6px;
    right: 6px;
    background: rgba(0, 0, 0, 0.75);
    color: white;
    font-size: 0.65rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    font-variant-numeric: tabular-nums;
}

/* Output Sections */
.output-section {
    margin-bottom: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.output-title {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.output-preview {
    max-width: 100%;
    overflow-x: auto;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.output-preview img,
.output-preview canvas {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
}

/* Bulk Actions */
.bulk-actions {
    display: flex;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.bulk-actions .btn {
    flex: 1;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    text-align: center;
    padding-top: 3rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

/* ============================================
   Utilities
   ============================================ */
.hidden {
    display: none !important;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .shapes-container {
        transform: translate(-20%, -50%) scale(0.7);
    }

    .app {
        padding: 2rem 1.25rem;
    }

    .header {
        margin-bottom: 3rem;
    }

    .logo {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .shapes-container {
        transform: translate(-10%, -50%) scale(0.5);
    }

    .video-info {
        flex-direction: column;
    }

    .video-info video {
        width: 100%;
    }

    .video-meta {
        width: 100%;
    }

    .clear-btn {
        margin-left: 0;
        margin-top: 0.5rem;
        width: 100%;
    }

    .bulk-actions {
        flex-direction: column;
    }

    .radio-group,
    .checkbox-group {
        flex-direction: column;
    }

    .radio-option,
    .checkbox-option {
        width: 100%;
    }

    .drop-zone {
        padding: 3rem 1.5rem;
    }
}