/* ============================================================
   在线录屏 - 样式
   现代化 UI，CSS Variables 主题
   ============================================================ */

/* CSS Variables */
:root {
    --color-bg: #f0f2f5;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    --color-border: #e2e8f0;
    --color-border-light: #edf2f7;
    --color-text: #1a202c;
    --color-text-secondary: #718096;
    --color-text-muted: #a0aec0;
    --color-primary: #4361ee;
    --color-primary-hover: #3a56d4;
    --color-primary-light: #eef2ff;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-secondary: #64748b;
    --color-secondary-hover: #475569;
    --color-success: #10b981;
    --color-success-light: #ecfdf5;
    --color-warning: #f59e0b;
    --color-warning-bg: #fffbeb;
    --color-warning-border: #fcd34d;
    --color-rec-dot: #ef4444;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.04);
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #a0aec0;
}

/* ============================================================
   SVG 图标
   ============================================================ */
.icon {
    width: 16px;
    height: 16px;
    vertical-align: -2px;
    flex-shrink: 0;
}

.btn-icon {
    width: 18px;
    height: 18px;
    vertical-align: -3px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.placeholder-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    opacity: 0.4;
}

/* ============================================================
   录制指示器
   ============================================================ */
.recording-indicator {
    position: fixed;
    top: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(15, 15, 15, 0.9);
    color: #fff;
    padding: 8px 18px;
    border-radius: 24px;
    font-size: 13px;
    z-index: 9999;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.red-dot {
    width: 10px;
    height: 10px;
    background: var(--color-rec-dot);
    border-radius: 50%;
    animation: blink 1s infinite;
    box-shadow: 0 0 6px rgba(239, 68, 68, 0.6);
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.rec-text {
    font-weight: 600;
    letter-spacing: 0.5px;
}

.rec-timer {
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.5px;
    font-family: "SF Mono", "Cascadia Code", "Consolas", monospace;
}

/* ============================================================
   通用工具类
   ============================================================ */
.hidden {
    display: none !important;
}

.full-width {
    width: 100%;
}

/* ============================================================
   应用容器
   ============================================================ */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 28px;
}

/* 顶部标题 */
.app-header {
    text-align: center;
    margin-bottom: 20px;
}

.logo-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.app-header h1 {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-header .subtitle {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-top: 6px;
}

/* ============================================================
   FFmpeg 加载状态
   ============================================================ */
.ffmpeg-status {
    background: var(--color-primary-light);
    border: 1px solid #c7d2fe;
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    margin-bottom: 16px;
    font-size: 13px;
    color: #4338ca;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: opacity var(--transition-slow);
}

.ffmpeg-status.done {
    background: var(--color-success-light);
    border-color: #a7f3d0;
    color: #065f46;
}

.ffmpeg-progress-bar {
    flex: 1;
    height: 4px;
    background: rgba(67, 56, 202, 0.15);
    border-radius: 2px;
    overflow: hidden;
}

.ffmpeg-status.done .ffmpeg-progress-bar {
    background: rgba(16, 185, 129, 0.15);
}

.ffmpeg-progress {
    height: 100%;
    background: #4338ca;
    border-radius: 2px;
    transition: width 0.3s ease;
}

.ffmpeg-status.done .ffmpeg-progress {
    background: var(--color-success);
}

/* ============================================================
   兼容性警告区
   ============================================================ */
.compat-warnings {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    margin-bottom: 16px;
}

.compat-warnings .warn-title {
    font-weight: 600;
    color: #92400e;
    margin-bottom: 6px;
    font-size: 14px;
}

.compat-warnings ul {
    list-style: none;
    padding: 0;
}

.compat-warnings li {
    padding: 3px 0;
    font-size: 13px;
    color: #78350f;
    line-height: 1.5;
}

.compat-warnings li::before {
    content: "⚠ ";
}

/* ============================================================
   主内容区 - 两栏布局
   ============================================================ */
.main-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
    align-items: start;
}

/* ============================================================
   控制面板（左侧）
   ============================================================ */
.control-panel {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: sticky;
    top: 24px;
}

.panel-section {
    border-bottom: 1px solid var(--color-border-light);
    padding: 14px 0;
}

.panel-section:first-child {
    padding-top: 0;
}

.panel-section:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.section-title {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* 复选框 */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    padding: 5px 8px;
    border-radius: var(--radius-xs);
    transition: background var(--transition);
}

.checkbox-label:hover {
    background: var(--color-bg);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.checkbox-label input[type="checkbox"]:disabled + span {
    opacity: 0.5;
}

/* 麦克风选择 */
.mic-select-wrapper {
    margin-top: 6px;
    padding: 0 8px;
}

/* 设置行 */
.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    padding: 5px 8px;
    border-radius: var(--radius-xs);
}

.setting-row label {
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* 选择框 */
.select-input {
    padding: 6px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    font-size: 13px;
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.select-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.12);
}

.select-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--color-bg);
}

/* 数字输入 */
.input-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.number-input {
    width: 60px;
    padding: 6px 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    font-size: 13px;
    text-align: center;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    color: var(--color-text);
}

.number-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.12);
}

.number-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--color-bg);
}

.input-suffix {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ============================================================
   按钮
   ============================================================ */
.control-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.btn {
    padding: 10px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    user-select: none;
}

.btn:active:not(:disabled) {
    transform: scale(0.97);
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn-lg {
    padding: 12px 20px;
    font-size: 15px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #6366f1);
    color: #fff;
    box-shadow: 0 2px 8px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary-hover), #5b5bd6);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.4);
}

.btn-secondary {
    background: var(--color-secondary);
    color: #fff;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-secondary-hover);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
}

/* ============================================================
   预览区域（右侧）
   ============================================================ */
.preview-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.preview-area {
    position: relative;
    background: #0f0f0f;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.preview-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.preview-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #4a5568;
    font-size: 15px;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #94a3b8;
}

.preview-placeholder p {
    font-size: 14px;
}

/* ============================================================
   转码进度
   ============================================================ */
.transcode-status {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-size: 13px;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.transcode-progress-bar {
    flex: 1;
    height: 4px;
    background: var(--color-border-light);
    border-radius: 2px;
    overflow: hidden;
}

.transcode-progress {
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* ============================================================
   已保存片段列表
   ============================================================ */
.segments-section {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px 20px;
}

.segments-list {
    max-height: 260px;
    overflow-y: auto;
}

.segments-list .empty-hint {
    color: var(--color-text-muted);
    font-size: 13px;
    text-align: center;
    padding: 20px 0;
}

.segment-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 8px;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 13px;
    border-radius: var(--radius-xs);
    transition: background var(--transition);
}

.segment-item:hover {
    background: var(--color-bg);
}

.segment-item:last-child {
    border-bottom: none;
}

.segment-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 12px;
    font-weight: 500;
}

.segment-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.segment-actions button {
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition);
}

.segment-actions button:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ============================================================
   底部栏
   ============================================================ */
.app-footer {
    margin-top: 32px;
    padding: 16px 0;
    text-align: center;
    border-top: 1px solid var(--color-border-light);
}

.app-footer p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ============================================================
   响应式布局
   ============================================================ */
@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .control-panel {
        position: static;
    }

    .app-container {
        padding: 16px;
    }

    .app-header h1 {
        font-size: 22px;
    }

    .preview-area {
        aspect-ratio: 16 / 10;
    }
}

@media (max-width: 480px) {
    .btn-row {
        grid-template-columns: 1fr;
    }

    .setting-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .recording-indicator {
        top: 8px;
        right: 8px;
        font-size: 12px;
        padding: 6px 12px;
    }
}