/* ==================== CSS Variables ==================== */
:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --secondary: #64748b;
    --secondary-hover: #475569;

    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --border-glass: rgba(255, 255, 255, 0.1);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --green-screen: #00ff00;

    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);

    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* ==================== App Container ==================== */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    min-height: 100vh;
}

/* ==================== Header ==================== */
.header {
    text-align: center;
    margin-bottom: 28px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 6px;
}

.logo-icon {
    font-size: 42px;
}

.logo h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 36px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary) 0%, #a855f7 50%, var(--success) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ==================== Main Content ==================== */
.main-content {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
}

/* ==================== Video Section ==================== */
.video-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Upload Area */
.upload-area {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 2px dashed var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.upload-icon {
    font-size: 56px;
    margin-bottom: 16px;
}

.upload-area h3 {
    font-size: 22px;
    margin-bottom: 10px;
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.upload-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    color: white;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.upload-btn:hover {
    transform: translateY(-2px);
}

.upload-hint {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 16px !important;
}

/* Video Container */
.video-container {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    position: relative;
}

#videoPlayer {
    width: 100%;
    display: block;
    background: #000;
    max-height: 500px;
    object-fit: contain;
}

/* Count Overlay */
.count-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 10;
}

#countDisplay {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 120px;
    color: #fff;
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.15s ease-out;
}

#countDisplay.show {
    opacity: 1;
    transform: scale(1);
}

#countDisplay.pop {
    animation: popEffect 0.3s ease-out;
}

@keyframes popEffect {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Video Controls */
.video-controls {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

.control-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--primary);
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
}

.progress-bar {
    flex: 1;
}

.progress-track {
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    cursor: pointer;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--success) 100%);
    width: 0%;
    border-radius: 3px;
    transition: width 0.1s linear;
}

.time-display {
    font-size: 13px;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    min-width: 90px;
    text-align: right;
}

/* Instructions */
.instructions {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius);
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-glass);
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 14px;
}

.key {
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    color: white;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 13px;
}

.count-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.current-count {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 32px;
    color: var(--success);
}

/* ==================== Settings Panel ==================== */
.settings-panel {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 22px;
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 24px;
}

.panel-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-glass);
}

/* Setting Groups */
.setting-group {
    margin-bottom: 14px;
}

.setting-group.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.setting-group.setting-row .setting-label {
    margin-bottom: 0;
}

.setting-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}

.setting-select {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.setting-select:hover,
.setting-select:focus {
    border-color: var(--primary);
    outline: none;
}

.setting-select option {
    background: var(--bg-dark);
}

.setting-range {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
}

.setting-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    border-radius: 50%;
    cursor: pointer;
}

/* Color Picker */
.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-picker {
    width: 48px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0;
    background: none;
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-glass);
}

.color-value {
    font-family: 'Roboto Mono', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-glass);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 28px;
    transition: var(--transition);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition);
}

.toggle-switch input:checked+.toggle-slider {
    background: linear-gradient(135deg, var(--primary) 0%, var(--success) 100%);
}

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

/* Preview Box */
.preview-box {
    background: var(--green-screen);
    border-radius: var(--radius-sm);
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#previewText {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 50px;
    color: #fff;
}

/* ==================== Buttons ==================== */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--border-glass);
}

.btn {
    width: 100%;
    padding: 12px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #8b5cf6 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #34d399 100%);
    color: white;
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #f87171 100%);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
}

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

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
}

/* ==================== Modal ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 36px;
    text-align: center;
    min-width: 340px;
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow);
}

.modal-content h3 {
    font-size: 22px;
    margin-bottom: 24px;
}

.progress-container {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 14px;
}

.export-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--success) 100%);
    width: 0%;
    transition: width 0.3s ease;
}

#exportStatus {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .settings-panel {
        position: static;
    }
}

@media (max-width: 600px) {
    .app-container {
        padding: 16px;
    }

    .logo h1 {
        font-size: 26px;
    }

    .upload-area {
        padding: 40px 20px;
    }

    .instructions {
        flex-direction: column;
        gap: 14px;
    }
}