/* ========== 全局重置 & 基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #0b0e14;
    --bg-card: #151a23;
    --bg-header: #1c2230;
    --border-color: #252b38;
    --text-primary: #e8eaed;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-green: #00e5c8;
    --accent-green-dim: #00c4ab;
    --accent-green-glow: rgba(0, 229, 200, 0.25);
    --danger-red: #ef4444;
    --danger-red-dim: #dc2626;
    --danger-red-glow: rgba(239, 68, 68, 0.15);
    --warning-amber: #f59e0b;
    --info-blue: #3b82f6;
    --tab-inactive-bg: rgba(255, 255, 255, 0.04);
    --tab-inactive-border: rgba(255, 255, 255, 0.1);
    --tab-active-bg: #00e5c8;
    --tab-active-text: #0b0e14;
    --row-hover: rgba(0, 229, 200, 0.06);
    --row-alt: rgba(255, 255, 255, 0.015);
}

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica,
                 Arial, sans-serif;
    background: radial-gradient(ellipse at 70% 80%, rgba(0, 100, 90, 0.18) 0%, transparent 55%),
                radial-gradient(ellipse at 20% 20%, rgba(0, 60, 80, 0.15) 0%, transparent 50%),
                var(--bg-dark);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* ========== 顶部导航栏 ========== */
.topbar {
    background: transparent;
    padding: 20px 0 4px;
    position: relative;
    z-index: 100;
}

.topbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 44px;
    gap: 16px;
}

/* Tab 按钮组 */
.tabs {
    display: flex;
    gap: 10px;
    flex: 0 0 auto;
    justify-content: flex-start;
    flex-wrap: wrap;
}

.tab-btn {
    background: var(--tab-inactive-bg);
    color: var(--text-secondary);
    border: 1px solid var(--tab-inactive-border);
    padding: 9px 22px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    position: relative;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.tab-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.22);
    background: rgba(255, 255, 255, 0.08);
}

.tab-btn.active {
    color: var(--tab-active-text);
    background: var(--tab-active-bg);
    border-color: var(--tab-active-bg);
    font-weight: 700;
    box-shadow: 0 4px 20px var(--accent-green-glow), 0 0 40px rgba(0, 229, 200, 0.12);
}

/* 右上角管理区 */
.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    margin-left: auto;
}

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

.admin-info .dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    margin-right: 6px;
    box-shadow: 0 0 6px var(--accent-green);
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-green);
    color: #0b0e14;
}
.btn-primary:hover {
    background: #1af0d8;
    box-shadow: 0 0 16px var(--accent-green-glow);
}

.btn-login {
    background: var(--accent-green);
    color: #0b0e14;
    padding: 7px 18px;
    border: none;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.btn-login:hover {
    background: #1af0d8;
    box-shadow: 0 0 16px var(--accent-green-glow);
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.btn-outline:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: var(--bg-header);
}

.btn-danger {
    background: var(--danger-red-dim);
    color: #fff;
}
.btn-danger:hover {
    background: var(--danger-red);
    box-shadow: 0 0 12px var(--danger-red-glow);
}

.btn-danger-outline {
    background: transparent;
    color: var(--danger-red);
    border: 1px solid var(--danger-red-dim);
}
.btn-danger-outline:hover {
    background: var(--danger-red-glow);
}

.btn-warning {
    background: var(--warning-amber);
    color: #0f1117;
}

.btn-sm {
    padding: 5px 12px;
    font-size: 12px;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ========== 管理工具栏 ========== */
.admin-toolbar {
    max-width: 1400px;
    margin: 18px auto 0;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.admin-toolbar .spacer {
    flex: 1;
}

/* ========== 主内容区 ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 20px 40px;
}

/* 表格容器 */
.table-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

/* ========== 表格 ========== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table thead th {
    background: var(--accent-green);
    color: #0b0e14;
    font-weight: 700;
    padding: 14px 16px;
    text-align: left;
    font-size: 14px;
    letter-spacing: 0.3px;
    white-space: nowrap;
    user-select: none;
}

.data-table thead th:first-child {
    width: 60px;
    text-align: center;
}

.data-table thead th.col-num {
    width: 100px;
}

.data-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: top;
    word-break: break-word;
}

.data-table tbody tr:hover {
    background: var(--row-hover);
}

.data-table tbody tr:nth-child(even) {
    background: var(--row-alt);
}
.data-table tbody tr:nth-child(even):hover {
    background: var(--row-hover);
}

.data-table tbody td:first-child {
    text-align: center;
    color: var(--text-muted);
    font-weight: 600;
    width: 60px;
}

.data-table .col-num {
    color: var(--accent-green);
    font-weight: 700;
    width: 100px;
    white-space: nowrap;
}

/* 行内操作按钮 */
.row-actions {
    display: flex;
    gap: 6px;
    white-space: nowrap;
}

/* 复选框 */
.cb-cell {
    width: 40px !important;
    text-align: center;
}
.cb-cell input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-green);
    cursor: pointer;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}
.empty-state .icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.55;
}
.empty-state .empty-hint {
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 6px;
}

/* ========== 加载状态 ========== */
.loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.loading .spinner {
    display: inline-block;
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== 分页 ========== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
}

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

.page-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.page-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-dark);
    color: var(--text-secondary);
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.page-btn:hover:not(:disabled) {
    border-color: var(--accent-green);
    color: var(--accent-green);
}
.page-btn.active {
    background: var(--accent-green);
    color: #0b0e14;
    border-color: var(--accent-green);
    font-weight: 700;
}
.page-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}
.page-ellipsis {
    padding: 0 4px;
    color: var(--text-muted);
}

/* ========== 模态框 ========== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
}
.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
    animation: modalIn 0.2s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 22px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    line-height: 1;
}
.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-header);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ========== 表单 ========== */
.form-group {
    margin-bottom: 18px;
}
.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-group label .required {
    color: var(--danger-red);
    margin-left: 2px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.15s ease;
}
.form-control:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px var(--accent-green-glow);
}
textarea.form-control {
    min-height: 80px;
    resize: vertical;
}

/* 登录模态框特殊样式 */
.login-modal .modal {
    max-width: 400px;
}

/* 导入结果 */
.import-result {
    background: var(--bg-dark);
    border-radius: 8px;
    padding: 14px 18px;
    margin-top: 16px;
    max-height: 200px;
    overflow-y: auto;
}
.import-result .success-count {
    color: var(--accent-green);
    font-weight: 600;
    margin-bottom: 8px;
}
.import-result .error-item {
    color: var(--danger-red);
    font-size: 13px;
    padding: 2px 0;
}

/* 文件上传区域 */
.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 32px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-dark);
}
.file-upload-area:hover {
    border-color: var(--accent-green);
    background: var(--accent-green-glow);
}
.file-upload-area .upload-icon {
    font-size: 36px;
    margin-bottom: 8px;
}
.file-upload-area .upload-text {
    color: var(--text-secondary);
    font-size: 14px;
}
.file-upload-area .upload-hint {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 4px;
}
.file-upload-area input[type="file"] {
    display: none;
}
.file-upload-area.has-file {
    border-color: var(--accent-green);
    border-style: solid;
    background: var(--accent-green-glow);
}

/* ========== Toast 提示 ========== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    color: #fff;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    animation: toastIn 0.3s ease;
    max-width: 360px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.toast.success { background: var(--accent-green-dim); color: #0f1117; }
.toast.error { background: var(--danger-red); }
.toast.warning { background: var(--warning-amber); color: #0f1117; }
.toast.info { background: var(--info-blue); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}
.toast.fade-out {
    animation: toastOut 0.3s ease forwards;
}
@keyframes toastOut {
    to { opacity: 0; transform: translateX(40px); }
}

/* ========== 确认对话框 ========== */
.confirm-modal .modal {
    max-width: 420px;
}
.confirm-message {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-primary);
}
.confirm-message strong {
    color: var(--danger-red);
}

/* ========== 响应式 - 手机适配 ========== */
@media (max-width: 768px) {
    .topbar {
        padding: 14px 0 4px;
    }

    .topbar-inner {
        padding: 0 14px;
        min-height: 40px;
        gap: 8px;
        flex-wrap: wrap;
    }

    .topbar-actions {
        order: 2;
    }

    .tabs {
        order: 1;
        width: 100%;
        justify-content: flex-start;
        gap: 8px;
        margin-top: 0;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 4px;
    }
    .tabs::-webkit-scrollbar { display: none; }

    .tab-btn {
        flex: 0 0 auto;
        padding: 8px 16px;
        font-size: 13px;
        text-align: center;
        min-width: 0;
        border-radius: 999px;
    }

    .btn-login {
        padding: 6px 14px;
        font-size: 12px;
    }

    .admin-toolbar {
        padding: 0 12px;
        margin-top: 12px;
        gap: 6px;
    }

    .admin-toolbar .btn {
        padding: 7px 10px;
        font-size: 12px;
    }

    .container {
        padding: 12px;
    }

    .table-wrap {
        border-radius: 8px;
        overflow-x: auto;
    }

    .data-table {
        font-size: 13px;
    }

    .data-table thead th {
        padding: 10px 10px;
        font-size: 12px;
    }

    .data-table thead th:first-child {
        width: 40px;
    }

    .data-table tbody td {
        padding: 10px 10px;
        font-size: 13px;
    }

    .data-table tbody td:first-child {
        width: 40px;
    }

    .data-table .col-num {
        width: auto;
    }

    /* 手机端隐藏部分列，用卡片式展示 */
    .data-table,
    .data-table thead,
    .data-table tbody,
    .data-table th,
    .data-table td,
    .data-table tr {
        display: block;
    }

    .data-table thead tr {
        position: absolute;
        top: -9999px;
        left: -9999px;
    }

    .data-table tbody tr {
        border-bottom: 1px solid var(--border-color);
        padding: 8px 0;
    }

    .data-table tbody td {
        border: none;
        position: relative;
        padding: 6px 12px 6px 100px;
        min-height: 32px;
    }

    .data-table tbody td::before {
        position: absolute;
        left: 12px;
        width: 85px;
        padding-right: 8px;
        font-weight: 600;
        color: var(--accent-green);
        font-size: 12px;
        white-space: nowrap;
    }

    /* 非管理员模式：5列 */
    .data-table tbody td:nth-of-type(1)::before { content: "编号"; }
    .data-table tbody td:nth-of-type(2)::before { content: "接麦词"; }
    .data-table tbody td:nth-of-type(3)::before { content: "试音词"; }
    .data-table tbody td:nth-of-type(4)::before { content: "收尾词"; }

    /* 管理员模式：6列（多选框+4字段+操作） */
    .admin-mode .data-table tbody td:nth-of-type(1)::before { content: "选择"; }
    .admin-mode .data-table tbody td:nth-of-type(2)::before { content: "编号"; }
    .admin-mode .data-table tbody td:nth-of-type(3)::before { content: "接麦词"; }
    .admin-mode .data-table tbody td:nth-of-type(4)::before { content: "试音词"; }
    .admin-mode .data-table tbody td:nth-of-type(5)::before { content: "收尾词"; }
    .admin-mode .data-table tbody td:nth-of-type(6)::before { content: "操作"; }

    .data-table tbody td:first-child {
        text-align: left;
        width: auto !important;
    }

    /* 管理员模式下复选框单元格不需要左侧标签缩进 */
    .admin-mode .data-table tbody td:first-child {
        padding-left: 12px;
    }
    .admin-mode .data-table tbody td:first-child::before {
        display: none;
    }

    .pagination {
        padding: 12px;
        flex-direction: column;
    }

    .modal {
        border-radius: 12px;
        max-height: 95vh;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding-left: 16px;
        padding-right: 16px;
    }

    .toast-container {
        top: auto;
        bottom: 16px;
        right: 12px;
        left: 12px;
    }
    .toast {
        max-width: 100%;
    }

    .row-actions {
        flex-wrap: wrap;
    }
}

/* 超小屏幕 */
@media (max-width: 400px) {
    .btn {
        padding: 7px 10px;
        font-size: 12px;
    }
    .tab-btn {
        padding: 7px 14px;
        font-size: 12px;
    }
}