/* ChemFlow Expert - 自定义样式 */

/* ==================== 主题变量 ==================== */
:root {
    /* 浅色主题 (默认) */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-tertiary: #e8e8ed;
    --bg-card: rgba(255, 255, 255, 0.72);
    --bg-input: rgba(255, 255, 255, 0.8);
    --bg-hover: rgba(0, 0, 0, 0.04);
    
    --text-primary: #1d1d1f;
    --text-secondary: #424245;
    --text-tertiary: #6e6e73;
    --text-muted: #86868b;
    
    --border-color: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.04);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 0 1px rgba(0, 0, 0, 0.04), 0 4px 16px rgba(0, 0, 0, 0.08);
    
    --accent-primary: #0071e3;
    --accent-secondary: #00a0dc;
    --accent-success: #30d158;
    --accent-warning: #ff9f0a;
    --accent-danger: #ff453a;
    
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    
    --tab-active-bg: rgba(0, 113, 227, 0.08);
    --tab-icon-bg: rgba(0, 0, 0, 0.04);
    --tab-icon-active-bg: linear-gradient(135deg, #0071e3, #00a0dc);
    
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Consolas', 'Courier New', monospace;
}

[data-theme="dark"] {
    /* 深色主题 */
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-card: rgba(28, 28, 30, 0.72);
    --bg-input: rgba(44, 44, 46, 0.8);
    --bg-hover: rgba(255, 255, 255, 0.06);
    
    --text-primary: #f5f5f7;
    --text-secondary: #d1d1d6;
    --text-tertiary: #98989d;
    --text-muted: #6e6e73;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.05);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 4px 16px rgba(0, 0, 0, 0.4);
    
    --glass-bg: rgba(28, 28, 30, 0.72);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    --tab-active-bg: rgba(0, 113, 227, 0.2);
    --tab-icon-bg: rgba(255, 255, 255, 0.08);
    --tab-icon-active-bg: linear-gradient(135deg, #0071e3, #00a0dc);
}

/* ==================== 基础样式 ==================== */
* {
    font-family: var(--font-sans);
}

body {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ==================== 应用主体高度 ====================
   使用 100dvh 让移动端 (含 iOS Safari 浏览器地址栏伸缩) 有正确的视口高度；
   不支持 dvh 时回退到 100vh。 */
.app-shell {
    height: 100vh;
    height: 100dvh;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ==================== 侧边栏样式 ==================== */
.sidebar-card {
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
}

.sidebar-border {
    border-color: var(--border-color);
}

/* 主内容卡片 */
.main-card {
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
}

/* Tab按钮样式 */
.tab-btn {
    background: transparent;
    color: var(--text-tertiary);
    border-radius: 12px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--tab-active-bg);
    color: var(--accent-primary);
    font-weight: 500;
}

.tab-btn .tab-icon {
    background: var(--tab-icon-bg);
    border-radius: 10px;
    transition: all 0.2s;
}

.tab-btn.active .tab-icon {
    background: var(--tab-icon-active-bg);
    box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

/* 主题切换按钮 */
.theme-toggle-btn {
    background: var(--bg-hover);
    color: var(--text-secondary);
    border-radius: 10px;
    transition: all 0.2s;
}

.theme-toggle-btn:hover {
    background: var(--tab-active-bg);
}

/* 重置数据按钮 */
.reset-btn {
    background: rgba(255, 69, 58, 0.1);
    color: var(--accent-danger);
    border: 1px solid rgba(255, 69, 58, 0.2);
    border-radius: 10px;
    transition: all 0.2s;
}

.reset-btn:hover {
    background: rgba(255, 69, 58, 0.2);
    border-color: rgba(255, 69, 58, 0.4);
}

/* 模式切换按钮 */
.mode-switch-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-switch-btn:hover {
    color: var(--text-primary);
    background: var(--bg-primary);
}

.mode-switch-btn.active {
    background: var(--bg-primary);
    color: var(--accent-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    font-weight: 500;
}

[data-theme="dark"] .mode-switch-btn.active {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* 小型模式切换按钮 */
.mode-switch-btn-sm {
    padding: 0.5rem 0.875rem;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.mode-switch-btn-sm:hover {
    color: var(--text-primary);
}

.mode-switch-btn-sm.active {
    background: var(--bg-primary);
    color: var(--accent-primary);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .mode-switch-btn-sm.active {
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
}

/* 碎片丢失小按钮 */
.fragment-btn {
    padding: 0.375rem 0.625rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.15s ease;
}

.fragment-btn:hover {
    color: var(--accent-warning);
    border-color: var(--accent-warning);
    background: rgba(255, 159, 10, 0.1);
}

/* 多质量切换按钮 (位于结果区顶部) */
.mass-switch-btn {
    padding: 0.5rem 0.875rem;
    border-radius: 8px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.mass-switch-btn:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.mass-switch-btn.active {
    color: #fff;
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 1px 4px rgba(0, 113, 227, 0.3);
}

/* 按钮激活时强制覆盖内部子元素的颜色（按钮内 div/span 可能有内联 color） */
.mass-switch-btn.active,
.mass-switch-btn.active * {
    color: #fff !important;
}
.mass-switch-btn.active .opacity-60 {
    opacity: 0.85;
}

/* ==================== 主内容区 ==================== */
.main-content {
    background: var(--bg-secondary);
}

/* ==================== 碎片丢失标签样式 ==================== */
.loss-tag {
    background: rgba(255, 159, 10, 0.15);
    color: var(--accent-warning);
    border: 1px solid rgba(255, 159, 10, 0.3);
    border-radius: 8px;
}

[data-theme="dark"] .loss-tag {
    background: rgba(255, 159, 10, 0.2);
}

/* ==================== 玻璃卡片样式 (Apple风格) ==================== */
.card, .glass-card {
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.25rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    transform: translateY(-1px);
}

@media (min-width: 1024px) {
    .card, .glass-card {
        padding: 1.5rem;
        border-radius: 24px;
    }
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.card-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

@media (min-width: 1024px) {
    .card-title {
        font-size: 1.1875rem;
    }
}

/* 警告边框卡片 */
.border-warning {
    border-color: var(--accent-warning) !important;
}

/* ==================== 输入框样式 ==================== */
.input-field {
    background: var(--bg-input);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    font-weight: 400;
}

.input-field:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
    background: var(--bg-primary);
}

.input-field::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

/* 紧凑型单位下拉框：用于稀释/溶液配制等行内单位切换 (M/mM/μM, L/mL/μL ...)
   原 .input-field 默认水平内边距 1rem + 原生箭头宽度约 20px，
   当 select 宽度被限制在 64-80px 时文字会被截断或溢出边界。 */
select.input-field.input-field-unit {
    padding-left: 0.5rem;
    padding-right: 0.4rem;
    background-position: right 0.25rem center;
}

/* ==================== 按钮样式 ==================== */
.btn-primary {
    background: var(--accent-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
}

.btn-primary:hover {
    background: #0077ed;
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(0, 113, 227, 0.4);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-danger {
    background: var(--accent-danger);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
}

.btn-danger:hover {
    background: #ff5e54;
    transform: scale(1.02);
    box-shadow: 0 4px 16px rgba(255, 69, 58, 0.4);
}

.btn-danger:active {
    transform: scale(0.98);
}

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    cursor: pointer;
    letter-spacing: -0.01em;
}

.btn-secondary:hover {
    background: var(--tab-active-bg);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    border-radius: 10px;
}

/* ==================== 表格样式 ==================== */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.875rem;
}

.data-table th {
    background: var(--bg-hover);
    color: var(--text-tertiary);
    font-weight: 500;
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table th:first-child {
    border-radius: 12px 0 0 12px;
}

.data-table th:last-child {
    border-radius: 0 12px 12px 0;
}

.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-light);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.data-table tr:hover td {
    background: var(--bg-hover);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table .positive {
    color: var(--accent-success);
    font-weight: 500;
}

.data-table .negative {
    color: var(--accent-danger);
    font-weight: 500;
}

/* ==================== 标签样式 ==================== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.tag-blue {
    background: rgba(0, 113, 227, 0.12);
    color: var(--accent-primary);
}

.tag-green {
    background: rgba(48, 209, 88, 0.12);
    color: var(--accent-success);
}

.tag-red {
    background: rgba(255, 69, 58, 0.12);
    color: var(--accent-danger);
}

.tag-yellow {
    background: rgba(255, 159, 10, 0.12);
    color: var(--accent-warning);
}

/* ==================== 网格布局 ==================== */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 640px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 640px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.25rem;
    }
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
    }
}

/* ==================== 结果显示 ==================== */
.result-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
    letter-spacing: -0.02em;
}

.result-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

/* ==================== 信息卡片样式 ==================== */
.info-card {
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.info-card-blue {
    background: rgba(0, 113, 227, 0.06);
    border: 1px solid rgba(0, 113, 227, 0.15);
    border-radius: 16px;
}

.info-card-cyan {
    background: rgba(0, 160, 220, 0.06);
    border: 1px solid rgba(0, 160, 220, 0.15);
    border-radius: 16px;
}

.info-card-green {
    background: rgba(48, 209, 88, 0.06);
    border: 1px solid rgba(48, 209, 88, 0.15);
    border-radius: 16px;
}

.info-card-purple {
    background: rgba(175, 82, 222, 0.06);
    border: 1px solid rgba(175, 82, 222, 0.15);
    border-radius: 16px;
}

.info-card-indigo {
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: 16px;
}

/* ==================== 自定义氨基酸标记 ==================== */
.custom-aa-badge {
    background: var(--accent-warning);
    color: white;
    padding: 0.125rem 0.375rem;
    border-radius: 6px;
}

/* ==================== 动画 ==================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== 复选框样式 ==================== */
.checkbox-custom {
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-input);
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.checkbox-custom:checked {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-custom:checked::after {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

/* 行完成状态 */
.row-completed {
    background: rgba(48, 209, 88, 0.08) !important;
}

.row-completed td {
    color: var(--accent-success);
}

/* ==================== 氨基酸组成样式 ==================== */
.aa-present {
    background: rgba(0, 113, 227, 0.1);
    border: 1px solid rgba(0, 113, 227, 0.2);
    color: var(--accent-primary);
    border-radius: 10px;
}

.aa-absent {
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    opacity: 0.4;
    border-radius: 10px;
}

/* ==================== 注释样式 ==================== */
.note-danger {
    background: rgba(255, 69, 58, 0.08);
    border: 1px solid rgba(255, 69, 58, 0.2);
    border-radius: 12px;
}

.note-warning {
    background: rgba(255, 159, 10, 0.08);
    border: 1px solid rgba(255, 159, 10, 0.2);
    border-radius: 12px;
}

.note-success {
    background: rgba(48, 209, 88, 0.08);
    border: 1px solid rgba(48, 209, 88, 0.2);
    border-radius: 12px;
}

.note-info {
    background: rgba(0, 113, 227, 0.08);
    border: 1px solid rgba(0, 113, 227, 0.2);
    border-radius: 12px;
}

/* ==================== 分隔线 ==================== */
.divider {
    height: 1px;
    background: var(--border-color);
    margin: 1.25rem 0;
}

/* ==================== 快捷按钮组 ==================== */
.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ==================== 移动端侧边栏 ==================== */
@media (max-width: 1023px) {
    .sidebar-card {
        left: 0.5rem;
        top: 0.5rem;
        border-radius: 20px;
    }

    #sidebar-overlay.show {
        display: block;
    }
}

/* ==================== 超窄屏 (≤360px) 优化 ==================== */
@media (max-width: 360px) {
    .app-shell {
        padding: 0.375rem;
        gap: 0.375rem;
    }
    .main-card,
    .sidebar-card {
        border-radius: 16px;
    }
    .card, .glass-card {
        padding: 0.875rem;
        border-radius: 16px;
    }
    .card-title {
        font-size: 1rem;
    }
    .card-header {
        gap: 0.5rem;
        margin-bottom: 0.75rem;
        padding-bottom: 0.75rem;
    }
    #panels-container {
        padding: 0.625rem;
    }
    .data-table th,
    .data-table td {
        padding: 0.5rem 0.625rem;
    }
    .btn-primary, .btn-secondary {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }
    /* 侧边栏底部数据按钮在极窄屏改为单列 */
    .sidebar-data-btn {
        font-size: 0.75rem;
        padding: 0.5rem;
    }
}

/* ==================== 平板/小桌面屏 (768-1023px) 侧边栏可用宽度修正 ==================== */
@media (min-width: 768px) and (max-width: 1023px) {
    /* 主内容区在抽屉打开时不被挤压：内容区始终占满 */
    #sidebar {
        max-width: 80vw;
    }
}

/* ==================== 桌面端 (≥1024px) 应用整体宽度限制为视口 95% ==================== */
@media (min-width: 1024px) {
    .app-shell {
        max-width: 95vw;
        margin-left: auto;
        margin-right: auto;
    }
}

/* ==================== 让任何 data-table 默认横向滚动友好 ====================
   .data-table 通常需要在 .overflow-x-auto 容器内；保证内容不被截断时仍可滚动 */
.data-table {
    table-layout: auto;
}

/* 防止 flex 子项内容溢出（特别是包含 <pre>, <code>, 长 mono 字符串时） */
.main-card,
#panels-container {
    min-width: 0;
}

/* 长字符串（分子式、序列）默认换行避免横向溢出 */
.font-mono.break-all,
.break-all {
    overflow-wrap: anywhere;
    word-break: break-word;
}

/* ==================== 触摸优化 ==================== */
@media (hover: none) and (pointer: coarse) {
    .btn-primary, .btn-secondary, .tab-btn {
        min-height: 48px;
    }

    .input-field {
        min-height: 48px;
        font-size: 16px;
    }

    /* 表格/规划行内紧凑输入框：保持 16px 字号避免 iOS 聚焦缩放，
       但不强制 48px 高度，否则 9-10 列表格在窄屏会撑得过高。 */
    .data-table .input-field,
    .data-table select.input-field,
    .input-field.py-1 {
        min-height: 0;
        font-size: 16px;
    }

    /* 表格内的下拉选择 (检测/保护基切换) 也保持紧凑 */
    .data-table select {
        min-height: 0;
    }
}

/* ==================== 安全区域适配 ==================== */
@supports (padding: max(0px)) {
    .sidebar-card {
        padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
    }
    
    #panels-container {
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }
}

/* ==================== Toast 提示样式 ==================== */
.toast-message {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 12px;
    font-weight: 500;
}

[data-theme="dark"] .toast-message {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* ==================== 打印样式 ==================== */
.print-only {
    display: none !important;
}

@media print {
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    html, body {
        background: white !important;
        color: black !important;
        font-size: 11pt !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    body {
        display: block !important;
    }
    
    #sidebar, #sidebar-overlay, header, .no-print {
        display: none !important;
    }
    
    main {
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
    }
    
    #panels-container {
        padding: 10mm !important;
        overflow: visible !important;
        height: auto !important;
    }
    
    .print-only {
        display: block !important;
    }
    
    .card, .glass-card {
        background: white !important;
        backdrop-filter: none !important;
        border: 1px solid #ddd !important;
        box-shadow: none !important;
        border-radius: 8px !important;
        padding: 15px !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }
    
    .print-container {
        width: 100% !important;
        max-width: 100% !important;
    }
    
    .print-header {
        border-bottom: 2px solid #333 !important;
        padding-bottom: 10px !important;
        margin-bottom: 15px !important;
    }
    
    .print-sequence {
        background: #f5f5f5 !important;
        border: 1px solid #ddd !important;
        padding: 10px !important;
        margin-bottom: 15px !important;
    }
    
    .print-table-wrapper {
        overflow: visible !important;
        margin: 0 !important;
    }

    .print-table {
        width: 100% !important;
        min-width: 0 !important;
        border-collapse: collapse !important;
        font-size: 10pt !important;
        page-break-inside: auto;
    }
    
    .print-table thead {
        display: table-header-group;
    }
    
    .print-table tr {
        page-break-inside: avoid;
        break-inside: avoid;
    }
    
    .print-table th {
        background: #e0e0e0 !important;
        color: black !important;
        padding: 8px 6px !important;
        border: 1px solid #999 !important;
        font-size: 9pt !important;
    }
    
    .print-table td {
        padding: 6px !important;
        border: 1px solid #ccc !important;
        color: black !important;
        font-size: 10pt !important;
    }
    
    .print-check {
        width: 25px !important;
        text-align: center !important;
    }
    
    .print-checkbox {
        display: inline-block !important;
        width: 14px !important;
        height: 14px !important;
        border: 1.5px solid #666 !important;
        border-radius: 3px !important;
    }
    
    .print-note {
        min-width: 100px !important;
    }
    
    .note-line {
        display: block !important;
        border-bottom: 1px solid #ccc !important;
        height: 20px !important;
    }
    
    .test-cell {
        width: 40px !important;
    }
    
    .print-summary {
        margin-top: 15px !important;
        display: flex !important;
        gap: 10px !important;
    }
    
    .print-summary > div {
        flex: 1 !important;
        background: #f5f5f5 !important;
        border: 1px solid #ddd !important;
        padding: 10px !important;
        text-align: center !important;
    }
    
    .print-footer {
        display: flex !important;
        justify-content: space-between !important;
        margin-top: 20px !important;
        padding-top: 10px !important;
        border-top: 1px solid #ccc !important;
        font-size: 9pt !important;
        color: #666 !important;
    }
    
    .tag {
        background: #e0e0e0 !important;
        color: black !important;
        border: 1px solid #999 !important;
    }
    
    .info-card {
        background: #f5f5f5 !important;
        border: 1px solid #ddd !important;
    }
    
    /* 确保表格可以跨页 */
    @page {
        size: A4;
        margin: 15mm 10mm;
    }
}

/* ==================== 选择文本样式 ==================== */
::selection {
    background: rgba(0, 113, 227, 0.2);
    color: inherit;
}

/* ==================== 焦点样式优化 ==================== */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ==================== 无障碍优化 ==================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== 快照标签栏（标题卡下方，横向滑动） ==================== */
.snapshot-tabs {
    flex-shrink: 0;
}
.snapshot-tabs-bar {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 0.4rem 0.5rem;
}
@media (min-width: 1024px) {
    .snapshot-tabs-bar {
        border-radius: 18px;
        padding: 0.45rem 0.6rem;
    }
}
.snapshot-tabs-scroll {
    display: flex;
    gap: 0.375rem;
    overflow-x: auto;
    overflow-y: hidden;
    flex: 1;
    min-width: 0;
    scrollbar-width: thin;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}
.snapshot-tabs-scroll::-webkit-scrollbar {
    height: 4px;
}
.snapshot-tabs-scroll::-webkit-scrollbar-track {
    background: transparent;
}
.snapshot-tabs-scroll::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}
.snapshot-tabs-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}
.snapshot-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.4rem 0.375rem 0.7rem;
    border-radius: 10px;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    max-width: 16rem;
    user-select: none;
}
.snapshot-tab:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}
.snapshot-tab.active {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
    box-shadow: 0 2px 8px rgba(0, 113, 227, 0.3);
}
.snapshot-tab.active:hover {
    color: #fff;
    background: var(--accent-primary);
}
.snapshot-tab-name {
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 13rem;
    display: inline-block;
}
.snapshot-tab-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.125rem;
    height: 1.125rem;
    border-radius: 4px;
    border: none;
    background: transparent;
    color: inherit;
    opacity: 0.5;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    transition: opacity 0.15s ease, background 0.15s ease;
}
.snapshot-tab-close:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.12);
}
.snapshot-tab.active .snapshot-tab-close {
    opacity: 0.75;
}
.snapshot-tab.active .snapshot-tab-close:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.22);
}
.snapshot-tab-send {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.375rem;
    height: 1.375rem;
    border-radius: 5px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    color: inherit;
    opacity: 0.65;
    font-size: 0.8rem;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    transition: opacity 0.15s ease, background 0.15s ease, transform 0.12s ease;
}
.snapshot-tab-send:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.12);
    transform: scale(1.08);
}
.snapshot-tab.active .snapshot-tab-send {
    background: rgba(255, 255, 255, 0.18);
    opacity: 0.9;
}
.snapshot-tab.active .snapshot-tab-send:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.3);
}
.snapshot-tab-batch-send {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.875rem;
    height: 1.875rem;
    border-radius: 9px;
    border: 1px solid var(--border-color);
    background: var(--bg-hover);
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.15s ease;
}
.snapshot-tab-batch-send:hover:not(:disabled) {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
    transform: scale(1.05);
}
.snapshot-tab-batch-send:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.snapshot-tab-add {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.875rem;
    height: 1.875rem;
    border-radius: 9px;
    border: 1px dashed var(--border-color);
    background: transparent;
    color: var(--text-tertiary);
    font-size: 1.125rem;
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.15s ease;
}
.snapshot-tab-add:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    border-style: solid;
    background: var(--bg-hover);
}
/* 「新建空白」按钮：清空当前内容从头开始；实线底色与批量发送按钮同风，区别于 + 的虚线占位 */
.snapshot-tab-new {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.875rem;
    height: 1.875rem;
    border-radius: 9px;
    border: 1px solid var(--border-color);
    background: var(--bg-hover);
    color: var(--text-tertiary);
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.15s ease;
}
.snapshot-tab-new:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
    transform: scale(1.05);
}
.snapshot-tab-new svg {
    width: 1rem;
    height: 1rem;
}
.snapshot-tabs-empty {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    padding: 0.375rem 0.25rem;
    opacity: 0.7;
    flex: 1;
    min-width: 0;
}
@media (max-width: 640px) {
    .snapshot-tab {
        max-width: 11rem;
        padding: 0.35rem 0.35rem 0.35rem 0.6rem;
    }
    .snapshot-tab-name {
        max-width: 8.5rem;
    }
    .snapshot-tabs-bar {
        padding: 0.35rem 0.4rem;
    }
}

/* ==================== 面板顶部栏 (标题 + 历史按钮) - 独立小卡片 ==================== */
.panel-header {
    height: 3.25rem;
    flex-shrink: 0;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 18px;
}
@media (min-width: 1024px) {
    .panel-header {
        height: 3.75rem;
        border-radius: 20px;
    }
}
#panel-history-slot .history-toolbar {
    margin-bottom: 0;
}
#panel-history-slot .history-btn {
    padding: 0.4rem 0.7rem;
}
/* 窄屏：仅显示图标，隐藏按钮文字以节省空间（hidden sm:inline 已经隐藏，但徽章保留） */
@media (max-width: 480px) {
    #panel-history-slot .history-btn {
        padding: 0.4rem 0.55rem;
    }
}

/* ==================== 历史记录工具条 ==================== */
.history-toolbar {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    align-items: center;
    margin-bottom: 0.5rem;
}
.history-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    border-radius: 10px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.15s ease;
}
.history-btn:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}
.history-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 0.4rem;
    border-radius: 999px;
    background: var(--accent-primary);
    color: #fff;
    font-size: 0.6875rem;
    font-weight: 600;
    margin-left: 0.125rem;
}

/* 保存快照 — 重命名输入框（紧凑模态） */
.save-prompt-panel {
    background: var(--bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 28rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: history-slide-up 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.save-prompt-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 1.1rem;
    border-bottom: 1px solid var(--border-color);
}
.save-prompt-body {
    padding: 1rem 1.1rem 1.1rem;
}
@media (max-width: 640px) {
    .save-prompt-panel {
        border-radius: 16px;
    }
    .save-prompt-header,
    .save-prompt-body {
        padding: 0.75rem 0.875rem;
    }
}

/* ==================== 历史记录模态框 ==================== */
.history-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    animation: history-fade-in 0.15s ease;
}
.history-modal-panel {
    background: var(--bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 56rem;
    width: 100%;
    max-height: 85vh;
    max-height: 85dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: history-slide-up 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.history-modal-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}
.history-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.25rem;
}
.history-entry {
    padding: 0.875rem 1rem;
    border-radius: 14px;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    transition: background 0.15s ease;
}
.history-entry:hover {
    background: var(--bg-secondary);
}
.history-name-input {
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 12rem;
    max-width: 22rem;
    flex: 1;
    transition: all 0.15s ease;
}
.history-name-input:hover {
    border-color: var(--border-color);
}
.history-name-input:focus {
    border-color: var(--accent-primary);
    outline: none;
    background: var(--bg-primary);
}

/* 窄屏弹窗调整：避免标题/按钮挤压 */
@media (max-width: 640px) {
    .history-modal-overlay {
        padding: 0.5rem;
    }
    .history-modal-panel {
        border-radius: 18px;
    }
    .history-modal-header,
    .history-modal-body {
        padding: 0.75rem 0.875rem;
    }
    .history-name-input {
        min-width: 0;
        width: 100%;
        font-size: 0.875rem;
    }
    .history-modal-header > .text-2xl {
        font-size: 1.25rem;
    }
}
@keyframes history-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes history-slide-up {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ==================== 侧栏 JSON 导入/导出按钮 ==================== */
.sidebar-data-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem;
    border-radius: 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    width: 100%;
}
.sidebar-data-btn:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* ==================== 多肽结构图渲染容器 ====================
   多肽是横向延展的长链，canvas 宽度由 JS 根据残基数动态计算，
   wrapper 提供横向滚动以避免溢出主区域。 */
.peptide-structure-wrapper {
    overflow: auto;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    max-width: 100%;
    min-height: 320px;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
}
.peptide-structure-wrapper.is-local-render {
    background:
        linear-gradient(180deg, rgba(255,255,255,0.72), rgba(255,255,255,0.36)),
        var(--bg-secondary);
}
[data-theme="dark"] .peptide-structure-wrapper.is-local-render {
    background:
        linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.015)),
        var(--bg-secondary);
}
.peptide-structure-wrapper.is-dragging,
.peptide-structure-wrapper:active {
    cursor: grabbing;
}
.peptide-structure-wrapper canvas,
.peptide-structure-wrapper svg {
    display: block;
    max-width: none;
    background: transparent;
}
.smiles-text {
    background: var(--bg-hover);
    word-break: break-all;
    user-select: all;
    line-height: 1.6;
    cursor: text;
    border: 1px solid var(--border-color);
}

/* === 结构图工具栏 === */
.structure-toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
    padding: 0.5rem 0.625rem;
    background: var(--bg-hover);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}
.structure-toolbar-group {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}
.structure-toolbar-divider {
    width: 1px;
    height: 22px;
    background: var(--border-color);
}
.structure-toolbar-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0 0.5rem;
    height: 30px;
    border-radius: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
}
.structure-toolbar-checkbox:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}
.structure-toolbar-checkbox input {
    margin: 0;
    cursor: pointer;
}
.structure-toolbar-hint {
    margin-left: auto;
    display: flex;
    align-items: center;
}
.structure-style-select {
    padding: 0.25rem 0.5rem !important;
    font-size: 0.8125rem !important;
    height: 30px;
    min-width: 110px;
    border-radius: 8px !important;
}
.zoom-btn {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}
.zoom-btn:hover {
    background: var(--tab-active-bg);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}
.zoom-btn-text {
    padding: 0 0.625rem;
    height: 30px;
    border-radius: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}
.zoom-btn-text:hover {
    background: var(--tab-active-bg);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}
.zoom-label {
    min-width: 56px;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    opacity: 0.8;
    user-select: none;
}

/* === 全屏模式：让结构卡片占据整个视口 === */
.peptide-structure-card:fullscreen,
.peptide-structure-card:-webkit-full-screen {
    background: var(--bg-primary);
    padding: 1.25rem 1.5rem !important;
    overflow: auto;
    border-radius: 0 !important;
    display: flex;
    flex-direction: column;
}
.peptide-structure-card:fullscreen .peptide-structure-wrapper,
.peptide-structure-card:-webkit-full-screen .peptide-structure-wrapper {
    flex: 1;
    min-height: 0;
    max-height: none;
}

@media (max-width: 640px) {
    .structure-toolbar {
        gap: 0.25rem;
        padding: 0.375rem;
    }
    .structure-toolbar-hint {
        display: none;
    }
    .structure-toolbar-divider {
        display: none;
    }
}