/* 后台管理样式 - 简·导航 */
:root {
    --bg-color: #f5f5f7;
    --card-bg: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --border: #d2d2d7;
    --danger: #ff3b30;
    --danger-hover: #ff453a;
    --success: #34c759;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
}

/* 登录页 */
.login-panel {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #f5f5f7 0%, #e8e8ed 100%);
}

.login-box {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 48px 40px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
}

.login-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent), #5856d6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.btn-primary {
    width: 100%;
    padding: 12px 20px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
    padding: 10px 20px;
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover { background: var(--border); }

.btn-danger {
    padding: 10px 20px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-danger:hover { background: var(--danger-hover); }

.login-hint {
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 16px;
}

.back-link {
    display: block;
    text-align: center;
    color: var(--accent);
    text-decoration: none;
    margin-top: 20px;
    font-size: 14px;
}

/* 管理面板 */
.admin-panel { min-height: 100vh; display: flex; flex-direction: column; }

.admin-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.admin-header-left { display: flex; align-items: center; gap: 12px; }

.admin-logo {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), #5856d6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.admin-badge {
    background: var(--accent);
    color: white;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 20px;
}

.admin-header-right { display: flex; gap: 10px; flex-wrap: wrap; }

.admin-main {
    flex: 1;
    padding: 24px;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.admin-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--card-bg);
    padding: 6px;
    border-radius: 12px;
    border: 1px solid var(--border);
    width: fit-content;
}

.tab-btn {
    padding: 10px 24px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.tab-btn.active {
    background: var(--accent);
    color: white;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.toolbar { margin-bottom: 20px; }

.data-table {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
}

table { width: 100%; border-collapse: collapse; }

th, td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

th {
    background: var(--bg-color);
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
}

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

td-title {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.td-icon {
    width: 32px;
    height: 32px;
    background: var(--bg-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    font-size: 16px;
}

.td-icon img { width: 20px; height: 20px; object-fit: contain; }

.td-actions { display: flex; gap: 8px; }

.td-actions button {
    padding: 6px 12px;
    font-size: 13px;
    border-radius: 6px;
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 1000;
}

.modal.show { display: flex; }

.modal-content {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 28px;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-small { max-width: 380px; }

.modal-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-primary);
    color: var(--bg-color);
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 14px;
    opacity: 0;
    transition: all 0.3s;
    z-index: 2000;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(-10px); }
.toast.success { background: var(--success); color: white; }
.toast.error { background: var(--danger); color: white; }

/* 网站设置 */
.settings-form {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 28px;
    border: 1px solid var(--border);
}

.settings-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
}

.preview-box {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-color);
    padding: 12px 20px;
    border-radius: 12px;
}

.preview-icon {
    font-size: 24px;
}

.preview-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .admin-header { padding: 12px 16px; }
    .admin-main { padding: 16px; }
    .admin-tabs { width: 100%; }
    .tab-btn { flex: 1; text-align: center; }
    .data-table { overflow-x: auto; }
    table { min-width: 600px; }
}