.screen-recorder-container {
    display: grid;
    gap: var(--spacing-lg);
    max-width: 960px;
    margin: 0 auto;
}

.controls-section,
.preview-section,
.tips-section {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.controls-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.controls-header h2,
.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.duration-label {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 1.1rem;
    color: var(--primary-color);
    background: rgba(0, 122, 255, 0.08);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-small);
    height: 32px;
    display: flex;
    align-items: center;
}

/* 第一行：录制按钮 + 控制按钮 */
.control-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    align-items: center;
}

.record-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    min-height: 64px;
    position: relative;
    overflow: hidden;
}

.record-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.record-btn.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
}

.record-btn.primary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.record-btn.secondary {
    background: var(--surface-color);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.record-btn.secondary:hover:not(:disabled) {
    border-color: var(--primary-color);
    background: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.btn-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

.btn-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.btn-title {
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.2;
}

.btn-desc {
    font-size: 0.8rem;
    opacity: 0.8;
    line-height: 1.3;
}

/* 控制按钮组 */
.control-buttons-group {
    display: flex;
    gap: var(--spacing-sm);
    width: 100%;
    align-items: stretch;
}

/* 控制按钮 */
.control-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--surface-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.8rem;
    font-weight: 500;
    min-height: 64px;
    white-space: nowrap;
    flex: 1;
}

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

.control-btn:hover:not(:disabled) {
    background: var(--hover-color);
    border-color: var(--primary-color);
}

.control-btn svg {
    width: 18px;
    height: 18px;
}

.control-btn__label {
    line-height: 1;
}

/* 第二行：格式选择 + 下载按钮 */
.format-row {
    margin-bottom: var(--spacing-md);
}

.format-row h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.format-options {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-sm);
    align-items: center;
}

.format-option {
    cursor: pointer;
}

.format-option input[type="radio"] {
    display: none;
}

.format-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--surface-color);
    transition: all 0.3s ease;
    cursor: pointer;
    min-height: 64px;
}

.format-option.disabled .format-card {
    cursor: not-allowed;
    border-color: var(--border-color);
    background: var(--hover-color);
    box-shadow: none;
    transform: none;
    opacity: 0.6;
}

.format-option input[type="radio"]:checked + .format-card {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.15);
}

.format-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.format-option.disabled .format-card:hover {
    border-color: var(--border-color);
    box-shadow: none;
    transform: none;
}

.format-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.format-option.disabled .format-icon {
    color: var(--text-secondary);
}

.format-icon svg {
    width: 22px;
    height: 22px;
}

.format-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.format-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.format-option.disabled .format-name,
.format-option.disabled .format-desc {
    color: var(--text-secondary);
}

.format-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.3;
}

/* 下载按钮样式 */
.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    border: none;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    min-height: 64px;
    white-space: nowrap;
}

.download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.download-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
}

.download-btn svg {
    width: 20px;
    height: 20px;
}

.btn-loading {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-small);
    font-weight: 500;
    background: rgba(142, 142, 147, 0.1);
    color: var(--text-secondary);
    font-size: 0.85rem;
    height: 32px;
}

.status-indicator .status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-secondary);
    box-shadow: 0 0 0 4px rgba(142, 142, 147, 0.1);
}

.status-indicator[data-state="recording"] {
    background: rgba(255, 59, 48, 0.12);
    color: var(--error-color);
}

.status-indicator[data-state="recording"] .status-dot {
    background: var(--error-color);
    animation: pulse 1.2s infinite;
    box-shadow: 0 0 0 4px rgba(255, 59, 48, 0.2);
}

.status-indicator[data-state="paused"] {
    background: rgba(255, 149, 0, 0.12);
    color: var(--warning-color);
}

.status-indicator[data-state="paused"] .status-dot {
    background: var(--warning-color);
    box-shadow: 0 0 0 4px rgba(255, 149, 0, 0.2);
}

.status-indicator[data-state="ready"] {
    background: rgba(52, 199, 89, 0.12);
    color: var(--success-color);
}

.status-indicator[data-state="ready"] .status-dot {
    background: var(--success-color);
    box-shadow: 0 0 0 4px rgba(52, 199, 89, 0.2);
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
    100% { transform: scale(1); opacity: 1; }
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.video-wrapper {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: rgba(142, 142, 147, 0.1);
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
}

#recording-preview {
    width: 100%;
    height: 100%;
    display: none;
    background: black;
}

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

.placeholder svg {
    width: 72px;
    height: 72px;
}

.recording-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.info-item {
    background: rgba(142, 142, 147, 0.08);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-small);
}

.info-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.info-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* 使用说明样式 */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.tip-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.tip-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.tip-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: var(--border-radius);
    color: var(--primary-color);
}

.tip-icon svg {
    width: 20px;
    height: 20px;
}

.tip-content {
    flex: 1;
}

.tip-content h4 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.tip-content p {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.tip-content p:last-child {
    margin-bottom: 0;
}

.tip-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.action-btn.subtle {
    background: transparent;
    color: var(--text-secondary);
    border: 1px dashed var(--border-color);
}

.action-btn.subtle:hover {
    background: rgba(142, 142, 147, 0.08);
    color: var(--text-primary);
}

.status-message {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 0.9rem 1.2rem;
    border-radius: var(--border-radius-small);
    background: rgba(28, 28, 30, 0.85);
    color: #fff;
    box-shadow: var(--shadow-medium);
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 1200;
}

.status-message.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .controls-header,
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .duration-label {
        align-self: flex-start;
    }

    .header-right {
        flex-direction: column;
        align-items: flex-end;
        gap: var(--spacing-xs);
    }

    .control-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }

    .format-options {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }

    .record-btn {
        min-height: 44px;
        padding: var(--spacing-xs);
    }

    .btn-title {
        font-size: 0.8rem;
    }

    .btn-desc {
        font-size: 0.7rem;
    }

    .control-btn {
        min-height: 44px;
        font-size: 0.75rem;
    }

    .format-card {
        min-height: 44px;
    }

    .download-btn {
        min-height: 44px;
        font-size: 0.8rem;
    }

    .tips-grid {
        grid-template-columns: 1fr;
    }

    .tip-card {
        padding: var(--spacing-md);
    }

    .tip-icon {
        width: 36px;
        height: 36px;
    }

    .tip-content h4 {
        font-size: 0.95rem;
    }

    .tip-content p {
        font-size: 0.85rem;
    }
}