:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --error: #ef4444;
    --success: #22c55e;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    padding: 2rem 1rem;
}

.container {
    width: 100%;
    max-width: 600px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -1px;
    background: linear-gradient(to right, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
}

.card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

select, input[type="date"], input[type="range"] {
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    background: #0f172a;
    border: 1px solid #334155;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

select:focus, input[type="date"]:focus {
    border-color: var(--accent);
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.primary-btn {
    width: 100%;
    padding: 1rem;
    border-radius: 0.5rem;
    background: var(--accent);
    color: #0f172a;
    font-weight: 600;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    transition: all 0.2s;
}

.primary-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

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

.secondary-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
}

.secondary-btn:hover {
    background: rgba(56, 189, 248, 0.1);
}

.status-msg {
    margin-top: 1.5rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    text-align: center;
    font-size: 0.875rem;
}

.status-msg.info { background: rgba(56, 189, 248, 0.1); color: var(--accent); }
.status-msg.error { background: rgba(239, 68, 68, 0.1); color: var(--error); }
.status-msg.success { background: rgba(34, 197, 94, 0.1); color: var(--success); }

.hidden { display: none; }

.video-actions {
    margin-top: 1.5rem;
    text-align: center;
}

footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Custom Range Slider */
input[type="range"] {
    padding: 0;
    height: 8px;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}