/* ══════════════════════════════════════════════
   管理后台样式
   ══════════════════════════════════════════════ */

:root {
    --admin-bg: #f5f6fa;
    --admin-sidebar-bg: #ffffff;
    --admin-text: #1a1a2e;
    --admin-text-secondary: #6b7280;
    --admin-border: #e5e7eb;
    --admin-primary: #2563eb;
    --admin-primary-light: rgba(37, 99, 235, 0.08);
    --admin-danger: #ef4444;
    --admin-success: #10b981;
    --admin-warning: #f59e0b;
    --admin-radius: 8px;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --sidebar-width: 280px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-sans);
    background: var(--admin-bg);
    color: var(--admin-text);
    -webkit-font-smoothing: antialiased;
    overflow: hidden;
    height: 100vh;
}

/* ════════════════════════════
   登录界面
   ════════════════════════════ */
.login-overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 2.5rem;
    width: 380px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.login-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    color: #fff;
}

.login-card h2 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.login-hint {
    color: #9ca3af;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.login-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid #e5e7eb;
    border-radius: 10px;
    font-size: 1rem;
    font-family: var(--font-sans);
    outline: none;
    transition: border var(--transition);
    text-align: center;
    letter-spacing: 2px;
}

.login-input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.login-btn {
    width: 100%;
    padding: 0.75rem;
    margin-top: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.login-error {
    color: var(--admin-danger);
    font-size: 0.85rem;
    margin-top: 0.75rem;
    min-height: 1.25rem;
}

/* ════════════════════════════
   布局
   ════════════════════════════ */
.admin-layout {
    display: flex;
    height: 100vh;
}

/* ════════════════════════════
   侧边栏
   ════════════════════════════ */
.admin-sidebar {
    width: var(--sidebar-width);
    background: var(--admin-sidebar-bg);
    border-right: 1px solid var(--admin-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width var(--transition);
    overflow: hidden;
}

.admin-sidebar.collapsed {
    width: 60px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1rem;
    border-bottom: 1px solid var(--admin-border);
}

.sidebar-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    white-space: nowrap;
}

.sidebar-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--admin-text-secondary);
    padding: 4px;
    border-radius: 6px;
    transition: background var(--transition);
}

.sidebar-toggle:hover {
    background: var(--admin-primary-light);
    color: var(--admin-primary);
}

.sidebar-actions {
    padding: 1rem;
}

.btn-new-article {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1rem;
    background: var(--admin-primary);
    color: #fff;
    border: none;
    border-radius: var(--admin-radius);
    font-size: 0.92rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-new-article:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--admin-border);
    padding: 0 1rem;
}

.sidebar-tab {
    flex: 1;
    padding: 0.65rem 0;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--admin-text-secondary);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition);
}

.sidebar-tab.active {
    color: var(--admin-primary);
    border-bottom-color: var(--admin-primary);
}

.sidebar-tab .count {
    font-size: 0.75rem;
    background: var(--admin-primary-light);
    color: var(--admin-primary);
    padding: 1px 6px;
    border-radius: 10px;
    margin-left: 4px;
}

.article-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.article-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem 0.75rem;
    border-radius: var(--admin-radius);
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: 2px;
}

.article-list-item:hover {
    background: var(--admin-primary-light);
}

.article-list-item.active {
    background: var(--admin-primary-light);
    color: var(--admin-primary);
}

.article-list-item .item-title {
    font-size: 0.88rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.article-list-item .item-date {
    font-size: 0.72rem;
    color: var(--admin-text-secondary);
    margin-left: 0.5rem;
    flex-shrink: 0;
}

.article-list-item .item-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.item-status-dot.published { background: var(--admin-success); }
.item-status-dot.draft { background: var(--admin-warning); }

.item-pin-icon {
    font-size: 0.7rem;
    margin-right: 2px;
    flex-shrink: 0;
    line-height: 1;
}

.empty-hint {
    text-align: center;
    color: var(--admin-text-secondary);
    font-size: 0.85rem;
    padding: 2rem 1rem;
}

.sidebar-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--admin-border);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.btn-export, .btn-back {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem;
    background: none;
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius);
    font-size: 0.82rem;
    color: var(--admin-text-secondary);
    cursor: pointer;
    font-family: var(--font-sans);
    text-decoration: none;
    transition: all var(--transition);
}

.btn-export:hover, .btn-back:hover {
    background: var(--admin-primary-light);
    color: var(--admin-primary);
    border-color: var(--admin-primary);
}

/* 侧边栏收起状态 */
.admin-sidebar.collapsed .sidebar-header h2,
.admin-sidebar.collapsed .btn-new-article span,
.admin-sidebar.collapsed .sidebar-tab,
.admin-sidebar.collapsed .article-list,
.admin-sidebar.collapsed .sidebar-actions,
.admin-sidebar.collapsed .btn-export span,
.admin-sidebar.collapsed .btn-back span,
.admin-sidebar.collapsed .sidebar-footer {
    display: none;
}

.admin-sidebar.collapsed .sidebar-toggle {
    margin: 0 auto;
}

.admin-sidebar.collapsed .sidebar-header {
    justify-content: center;
}

/* ════════════════════════════
   主编辑区
   ════════════════════════════ */
.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.editor-empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--admin-text-secondary);
    gap: 0.5rem;
}

.empty-icon {
    color: #d1d5db;
    margin-bottom: 0.75rem;
}

.editor-empty h3 {
    font-size: 1.15rem;
    color: var(--admin-text);
    font-weight: 500;
}

.editor-empty p {
    font-size: 0.9rem;
    color: var(--admin-text-secondary);
}

/* 编辑器面板 */
.editor-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.editor-toolbar {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: #fff;
    border-bottom: 1px solid var(--admin-border);
    align-items: center;
}

.toolbar-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.85rem;
    background: #fff;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--admin-text-secondary);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition);
}

.toolbar-btn:hover {
    background: var(--admin-primary-light);
    color: var(--admin-primary);
    border-color: var(--admin-primary);
}

.btn-publish {
    color: var(--admin-success);
    border-color: var(--admin-success);
}

.btn-publish:hover {
    background: rgba(16, 185, 129, 0.08);
    color: #059669;
}

.btn-publish.is-published {
    color: var(--admin-warning);
    border-color: var(--admin-warning);
}

.btn-publish.is-published:hover {
    background: rgba(245, 158, 11, 0.08);
    color: #d97706;
}

.btn-pin {
    color: var(--admin-text-secondary);
}

.btn-pin:hover {
    background: var(--admin-primary-light);
    color: var(--admin-primary);
    border-color: var(--admin-primary);
}

.btn-pin.is-pinned {
    color: var(--admin-primary);
    border-color: var(--admin-primary);
    background: var(--admin-primary-light);
}

.btn-pin.is-pinned:hover {
    background: var(--admin-primary-light);
    color: #1d4ed8;
}

.btn-delete {
    margin-left: auto;
    color: var(--admin-danger);
}

.btn-delete:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: var(--admin-danger);
}

/* 编辑器元数据 */
.editor-meta {
    padding: 1rem 1.5rem 0;
    background: #fff;
}

.input-title {
    width: 100%;
    padding: 0.5rem 0;
    border: none;
    border-bottom: 1px solid transparent;
    font-size: 1.5rem;
    font-weight: 600;
    font-family: var(--font-sans);
    outline: none;
    color: var(--admin-text);
    transition: border var(--transition);
    margin-bottom: 0.75rem;
}

.input-title:focus {
    border-bottom-color: var(--admin-primary);
}

.input-title::placeholder {
    color: #d1d5db;
}

.meta-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.input-tags {
    flex: 1;
    min-width: 150px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font-size: 0.85rem;
    font-family: var(--font-sans);
    outline: none;
    transition: border var(--transition);
}

.input-tags:focus {
    border-color: var(--admin-primary);
}

.input-date {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font-size: 0.85rem;
    font-family: var(--font-sans);
    outline: none;
    transition: border var(--transition);
}

.input-date:focus {
    border-color: var(--admin-primary);
}

.input-excerpt {
    flex: 2;
    min-width: 200px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font-size: 0.85rem;
    font-family: var(--font-sans);
    outline: none;
    transition: border var(--transition);
}

.input-excerpt:focus {
    border-color: var(--admin-primary);
}

/* 状态栏 */
.editor-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1.5rem;
    background: #fff;
    border-bottom: 1px solid var(--admin-border);
}

.status-badge {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 2px 10px;
    border-radius: 10px;
    background: var(--admin-primary-light);
    color: var(--admin-primary);
}

.status-badge.published {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.status-id {
    font-size: 0.72rem;
    color: var(--admin-text-secondary);
    font-family: monospace;
}

/* Quill 编辑器 */
#quillEditor {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #fff;
    overflow: hidden;
}

#quillEditor .ql-toolbar.ql-snow {
    border: none;
    border-bottom: 1px solid var(--admin-border);
    padding: 0.5rem 1.5rem;
    background: #fafbfc;
}

#quillEditor .ql-container.ql-snow {
    border: none;
    font-size: 16px;
    font-family: var(--font-sans);
    flex: 1;
    overflow-y: auto;
}

#quillEditor .ql-editor {
    padding: 1.5rem;
    min-height: 400px;
    line-height: 1.85;
    font-size: 1rem;
}

#quillEditor .ql-editor.ql-blank::before {
    color: #d1d5db;
    font-style: normal;
}

/* ════════════════════════════
   弹窗
   ════════════════════════════ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
}

.modal-card {
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.modal-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

.modal-card p {
    color: var(--admin-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

.btn-cancel {
    padding: 0.5rem 1.25rem;
    background: #fff;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition);
}

.btn-cancel:hover {
    background: #f3f4f6;
}

.btn-confirm-delete {
    padding: 0.5rem 1.25rem;
    background: var(--admin-danger);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition);
}

.btn-confirm-delete:hover {
    background: #dc2626;
}

/* ════════════════════════════
   Toast
   ════════════════════════════ */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #1a1a2e;
    color: #fff;
    padding: 0.65rem 1.5rem;
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 500;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success { background: var(--admin-success); }
.toast.error { background: var(--admin-danger); }

/* ════════════════════════════
   响应式
   ════════════════════════════ */
@media (max-width: 768px) {
    .admin-sidebar {
        width: 100%;
        position: fixed;
        left: -100%;
        top: 0;
        height: 100vh;
        z-index: 100;
        transition: left var(--transition);
    }

    .admin-sidebar.mobile-open {
        left: 0;
    }

    .admin-sidebar.collapsed {
        width: 100%;
    }

    .admin-main {
        width: 100%;
    }

    .editor-toolbar {
        padding: 0.5rem 1rem;
        flex-wrap: wrap;
    }

    .editor-toolbar .toolbar-btn {
        font-size: 0.78rem;
        padding: 0.4rem 0.65rem;
    }

    .meta-row {
        flex-direction: column;
    }

    .login-card {
        width: 90%;
        margin: 1rem;
    }
}