:root {
    --primary-color: #007bff;
    --error-color: #dc3545;
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --border-radius: 6px;
    --transition-speed: 0.2s;
    --max-width: 800px;
}
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}
.hidden {
    display: none !important;
}
.protocol-banner {
    width: 100%;
    max-width: var(--max-width);
    margin-bottom: 12px;
    padding: 10px 14px;
    border-radius: var(--border-radius);
    background: #fff3cd;
    color: #664d03;
    border: 1px solid #ffecb5;
    font-size: 0.92rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
}
.protocol-banner-action {
    background: #664d03;
    color: #fff;
    font-size: 0.85rem;
    padding: 6px 10px;
}
.reconnect-modal {
    position: fixed;
    inset: 0;
    background: rgba(17, 24, 39, 0.55);
    display: grid;
    place-items: center;
    z-index: 1000;
    padding: 16px;
}
.reconnect-card {
    width: min(520px, 96vw);
    background: #fff;
    border-radius: 12px;
    padding: 18px;
    box-shadow: 0 16px 30px rgba(0,0,0,0.22);
}
.reconnect-card h3 {
    margin: 0 0 10px;
}
.reconnect-card p {
    margin: 6px 0;
    color: #334155;
}
.reconnect-actions {
    margin-top: 14px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.reconnect-actions .secondary {
    background: #64748b;
}
.container {
    width: 100%;
    max-width: var(--max-width);
    background: #fff;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.section {
    margin-bottom: 24px;
}
.section h3 {
    margin: 0 0 10px;
    font-size: 1rem;
}
label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}
input, select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ced4da;
    border-radius: var(--border-radius);
    font-size: 1rem;
    margin-bottom: 8px;
    transition: border-color var(--transition-speed);
    box-sizing: border-box;
}
input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
}
button {
    padding: 10px 16px;
    font-size: 1rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: #fff;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}
button:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
}
#uploadStatus.success { color: green; }
#uploadStatus.error, #errorMsg { color: var(--error-color); }
.mse-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 14px;
    align-items: end;
}
.checkbox-inline {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
}
.checkbox-inline input {
    width: auto;
    margin: 0;
}
.mse-indicators {
    margin-top: 16px;
    margin-bottom: 0;
}
.mse-indicators-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 14px;
}
.mse-indicator-item {
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    padding: 8px 10px;
    background: #f8fafc;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.mse-indicator-label {
    font-size: 0.78rem;
    color: #64748b;
}
.mse-indicator-item span:last-child {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.85rem;
    color: #0f172a;
}
#progress {
    width: 100%;
    background: #e9ecef;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-top: 12px;
    height: 10px;
    position: relative;
}
#buffer-bar {
    width: 0;
    height: 100%;
    background-color: #9ca3af;
    opacity: 0.65;
    transition: none;
}
#progress-bar {
    width: 0;
    height: 100%;
    background-color: var(--primary-color);
    transition: none;
    position: absolute;
    left: 0;
    top: 0;
}
#progressInfo {
    margin-top: 8px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #495057;
}
.status {
    margin-top: 8px;
    font-size: 0.9rem;
    font-weight: 600;
}
.status.idle { color: #6c757d; }
.status.loading { color: #0d6efd; }
.status.buffering { color: #fd7e14; }
.status.playing { color: #198754; }
.status.paused { color: #6f42c1; }
.status.ended { color: #198754; }
.status.error { color: var(--error-color); }
video {
    width: 100%;
    border-radius: var(--border-radius);
    background: #000;
}
@media (max-width: 720px) {
    .mse-grid {
        grid-template-columns: 1fr;
    }
    .mse-indicators-grid {
        grid-template-columns: 1fr;
    }
}