/* ==========================================================================
   CDN Guard 后台样式 —— 暖米白扁平化（warm cream flat）
   纯手写 CSS，变量驱动，不依赖任何 UI 框架 / 远程字体 / 图标库。
   ========================================================================== */

:root {
    /* 背景层次（暖米白） */
    --bg-0: #f5f3ee;
    --bg-1: #ffffff;
    --bg-2: #faf7f0;
    --bg-3: #f0ece2;

    /* 边框 */
    --border-1: #e7e1d2;
    --border-2: #d6cfb8;

    /* 文字 */
    --text-1: #1f2933;
    --text-2: #52606d;
    --text-3: #8d96a4;

    /* 主色 + 语义色 */
    --accent: #2563eb;
    --accent-2: #1d4ed8;
    --accent-soft: rgba(37, 99, 235, .10);
    --danger: #dc2626;
    --danger-soft: rgba(220, 38, 38, .10);
    --warning: #d97706;
    --warning-soft: rgba(217, 119, 6, .12);
    --success: #16a34a;
    --success-soft: rgba(22, 163, 74, .12);

    /* 圆角 */
    --radius-1: 6px;
    --radius-2: 10px;
    --radius-3: 14px;

    /* 阴影（极浅） */
    --shadow-1: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow-2: 0 8px 24px rgba(15, 23, 42, .10);

    --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

    --sidebar-w: 220px;
    --topbar-h: 56px;
}

/* --------------------------------------------------------------------------
   基础
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    background: var(--bg-0);
    color: var(--text-1);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-2);
    text-decoration: underline;
}

h1, h2, h3, h4 {
    margin: 0;
    font-weight: 600;
    line-height: 1.35;
}

p {
    margin: 0 0 10px;
}

code, .mono, .num {
    font-family: var(--mono);
    font-size: 12.5px;
}

.muted {
    color: var(--text-3);
}

.text-2 {
    color: var(--text-2);
}

.nowrap {
    white-space: nowrap;
}

.right {
    text-align: right;
}

.center {
    text-align: center;
}

.hidden {
    display: none !important;
}

/* --------------------------------------------------------------------------
   布局：左侧栏 + 主区
   -------------------------------------------------------------------------- */

.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-w);
    flex: 0 0 var(--sidebar-w);
    background: var(--bg-1);
    border-right: 1px solid var(--border-1);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 0 16px;
    border-bottom: 1px solid var(--border-1);
    flex: 0 0 auto;
}

.brand-mark {
    width: 26px;
    height: 26px;
    border-radius: var(--radius-1);
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
}

.brand-name {
    font-weight: 600;
    font-size: 14.5px;
    letter-spacing: .2px;
}

.brand-sub {
    font-size: 11px;
    color: var(--text-3);
    font-family: var(--mono);
}

.nav {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0 16px;
}

.nav-group {
    margin-bottom: 2px;
}

.nav-group-head {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 16px;
    background: none;
    border: 0;
    cursor: pointer;
    color: var(--text-3);
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: .6px;
    text-transform: uppercase;
    font-family: inherit;
}

.nav-group-head:hover {
    color: var(--text-2);
}

.nav-caret {
    margin-left: auto;
    transition: transform .18s ease;
    flex: 0 0 auto;
}

.nav-group.collapsed .nav-caret {
    transform: rotate(-90deg);
}

.nav-group.collapsed .nav-items {
    display: none;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 16px 7px 14px;
    color: var(--text-2);
    border-left: 2px solid transparent;
    font-size: 13.5px;
}

.nav-item:hover {
    background: var(--bg-3);
    color: var(--text-1);
    text-decoration: none;
}

.nav-item.active {
    background: var(--accent-soft);
    border-left-color: var(--accent);
    color: var(--accent);
    font-weight: 500;
}

.nav-item svg {
    flex: 0 0 auto;
    opacity: .85;
}

.nav-badge {
    margin-left: auto;
    font-family: var(--mono);
    font-size: 11px;
    background: var(--danger-soft);
    color: var(--danger);
    border-radius: 20px;
    padding: 0 6px;
    line-height: 17px;
}

.sidebar-foot {
    flex: 0 0 auto;
    border-top: 1px solid var(--border-1);
    padding: 10px 12px;
}

/* 主区 */

.main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: var(--topbar-h);
    flex: 0 0 auto;
    background: var(--bg-1);
    border-bottom: 1px solid var(--border-1);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 0 28px;
    position: sticky;
    top: 0;
    z-index: 20;
}

.topbar h1 {
    font-size: 16px;
    font-weight: 600;
}

.topbar-sub {
    color: var(--text-3);
    font-size: 12.5px;
}

.topbar-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 14px;
}

.role-badge {
    background: var(--accent-soft);
    color: var(--accent);
    border-radius: 20px;
    padding: 2px 10px;
    font-size: 12px;
    font-weight: 500;
}

.clock {
    font-family: var(--mono);
    font-size: 12.5px;
    color: var(--text-2);
}

.content {
    padding: 24px 28px;
    flex: 1;
}

/* --------------------------------------------------------------------------
   卡片
   -------------------------------------------------------------------------- */

.card {
    background: var(--bg-1);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-2);
    box-shadow: var(--shadow-1);
    margin-bottom: 18px;
}

.card-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-1);
    background: var(--bg-2);
    border-radius: var(--radius-2) var(--radius-2) 0 0;
}

.card-head h2,
.card-head h3 {
    font-size: 14px;
    font-weight: 600;
}

.card-head .card-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-desc {
    color: var(--text-3);
    font-size: 12.5px;
    font-weight: 400;
}

.card-body {
    padding: 16px;
}

.card-body.tight {
    padding: 0;
}

.card-foot {
    padding: 10px 16px;
    border-top: 1px solid var(--border-1);
    background: var(--bg-2);
    border-radius: 0 0 var(--radius-2) var(--radius-2);
}

/* --------------------------------------------------------------------------
   统计卡
   -------------------------------------------------------------------------- */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.stat-card {
    background: var(--bg-1);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-2);
    box-shadow: var(--shadow-1);
    padding: 14px 16px;
}

.stat-num {
    font-family: var(--mono);
    font-size: 26px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -.5px;
}

.stat-num.ok { color: var(--success); }
.stat-num.warn { color: var(--warning); }
.stat-num.bad { color: var(--danger); }
.stat-num.accent { color: var(--accent); }

.stat-label {
    color: var(--text-3);
    font-size: 12.5px;
    margin-top: 2px;
}

/* --------------------------------------------------------------------------
   表格
   -------------------------------------------------------------------------- */

.table-wrap {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}

.data-table thead th {
    background: var(--bg-2);
    border-bottom: 1px solid var(--border-1);
    color: var(--text-2);
    font-weight: 600;
    font-size: 12.5px;
    text-align: left;
    padding: 9px 12px;
    white-space: nowrap;
}

.data-table tbody td {
    border-bottom: 1px solid var(--border-1);
    padding: 9px 12px;
    vertical-align: middle;
}

.data-table tbody tr:last-child td {
    border-bottom: 0;
}

.data-table tbody tr:hover {
    background: var(--bg-3);
}

.data-table .col-actions {
    white-space: nowrap;
    text-align: right;
}

.data-table td.num,
.data-table th.num {
    font-family: var(--mono);
    font-size: 12.5px;
}

.empty {
    padding: 34px 16px;
    text-align: center;
    color: var(--text-3);
    font-size: 13px;
}

/* --------------------------------------------------------------------------
   按钮
   -------------------------------------------------------------------------- */

.btn,
.btn-primary,
.btn-mini,
.btn-danger,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 32px;
    padding: 0 13px;
    border-radius: var(--radius-1);
    border: 1px solid var(--border-2);
    background: var(--bg-1);
    color: var(--text-1);
    font-size: 13px;
    font-family: inherit;
    line-height: 1;
    cursor: pointer;
    white-space: nowrap;
    transition: background .15s ease, border-color .15s ease, color .15s ease;
}

.btn:hover,
.btn-mini:hover {
    background: var(--bg-3);
    text-decoration: none;
    color: var(--text-1);
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-2);
    border-color: var(--accent-2);
    color: #fff;
    text-decoration: none;
}

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

.btn-danger:hover {
    background: #b91c1c;
    border-color: #b91c1c;
    color: #fff;
    text-decoration: none;
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-2);
}

.btn-ghost:hover {
    background: var(--bg-3);
    color: var(--text-1);
    text-decoration: none;
}

.btn-mini {
    height: 26px;
    padding: 0 9px;
    font-size: 12.5px;
}

.btn-mini.danger {
    color: var(--danger);
    border-color: var(--border-2);
}

.btn-mini.danger:hover {
    background: var(--danger-soft);
    border-color: var(--danger);
}

.btn:disabled,
.btn-primary:disabled,
.btn-mini:disabled,
.btn-danger:disabled {
    opacity: .5;
    cursor: not-allowed;
}

.btn-row {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   状态标签
   -------------------------------------------------------------------------- */

.pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    height: 21px;
    padding: 0 8px;
    border-radius: 20px;
    font-size: 12px;
    line-height: 1;
    font-weight: 500;
    white-space: nowrap;
}

.pill-active {
    background: var(--success-soft);
    color: var(--success);
}

.pill-pending {
    background: var(--bg-3);
    color: var(--text-2);
}

.pill-warn {
    background: var(--warning-soft);
    color: var(--warning);
}

.pill-dead {
    background: var(--danger-soft);
    color: var(--danger);
}

.pill-accent {
    background: var(--accent-soft);
    color: var(--accent);
}

.pill-dot::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    flex: 0 0 auto;
}

/* --------------------------------------------------------------------------
   表单
   -------------------------------------------------------------------------- */

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    height: 32px;
    padding: 0 10px;
    background: var(--bg-1);
    border: 1px solid var(--border-2);
    border-radius: var(--radius-1);
    color: var(--text-1);
    font-size: 13.5px;
    font-family: inherit;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.form-textarea {
    height: auto;
    min-height: 64px;
    padding: 7px 10px;
    line-height: 1.5;
    resize: vertical;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-3);
}

.form-input.mono {
    font-family: var(--mono);
    font-size: 12.5px;
}

.form-input[readonly] {
    background: var(--bg-2);
    color: var(--text-2);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px 18px;
}

.form-grid.cols-1 { grid-template-columns: 1fr; }
.form-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.form-field {
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 0;
}

.form-field.span-2 { grid-column: span 2; }
.form-field.span-all { grid-column: 1 / -1; }

.form-label {
    font-size: 12.5px;
    color: var(--text-2);
    font-weight: 500;
}

.form-label .req {
    color: var(--danger);
    margin-left: 2px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.45;
}

.form-error {
    font-size: 12px;
    color: var(--danger);
}

.form-input.invalid,
.form-select.invalid {
    border-color: var(--danger);
}

.form-check {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 13.5px;
    color: var(--text-1);
    cursor: pointer;
    user-select: none;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 15px;
    height: 15px;
    accent-color: var(--accent);
    margin: 0;
    cursor: pointer;
}

.form-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--border-1);
}

/* 筛选条：紧凑固定宽度横向排列 */

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border-1);
}

.filter-bar .form-field {
    width: 160px;
    flex: 0 0 auto;
}

.filter-bar .form-field.wide {
    width: 220px;
}

.filter-bar .filter-actions {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

/* --------------------------------------------------------------------------
   告警条
   -------------------------------------------------------------------------- */

.alert {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    padding: 10px 14px;
    border-radius: var(--radius-1);
    border: 1px solid transparent;
    font-size: 13.5px;
    margin-bottom: 16px;
    line-height: 1.5;
}

.alert svg {
    flex: 0 0 auto;
    margin-top: 2px;
}

.alert-ok {
    background: var(--success-soft);
    border-color: rgba(22, 163, 74, .25);
    color: #14532d;
}

.alert-err {
    background: var(--danger-soft);
    border-color: rgba(220, 38, 38, .25);
    color: #7f1d1d;
}

.alert-warning {
    background: var(--warning-soft);
    border-color: rgba(217, 119, 6, .25);
    color: #78350f;
}

.alert-info {
    background: var(--accent-soft);
    border-color: rgba(37, 99, 235, .22);
    color: #1e3a8a;
}

.alert ul {
    margin: 4px 0 0;
    padding-left: 18px;
}

/* --------------------------------------------------------------------------
   弹窗
   -------------------------------------------------------------------------- */

.modal-mask {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .38);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 100;
}

.modal {
    background: var(--bg-1);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-3);
    box-shadow: var(--shadow-2);
    width: 100%;
    max-width: 440px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: modal-in .16s ease-out;
}

.modal.wide {
    max-width: 640px;
}

@keyframes modal-in {
    from { opacity: 0; transform: translateY(-6px) scale(.99); }
    to { opacity: 1; transform: none; }
}

.modal-head {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-1);
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-head h3 {
    font-size: 15px;
}

.modal-close {
    margin-left: auto;
    background: none;
    border: 0;
    color: var(--text-3);
    cursor: pointer;
    padding: 2px;
    display: flex;
    border-radius: var(--radius-1);
}

.modal-close:hover {
    background: var(--bg-3);
    color: var(--text-1);
}

.modal-body {
    padding: 16px 18px;
    overflow-y: auto;
    font-size: 13.5px;
    line-height: 1.6;
}

.modal-body .highlight {
    font-family: var(--mono);
    background: var(--bg-2);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-1);
    padding: 8px 10px;
    margin: 8px 0;
    word-break: break-all;
    font-size: 12.5px;
}

.modal-foot {
    padding: 12px 18px;
    border-top: 1px solid var(--border-1);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    background: var(--bg-2);
    border-radius: 0 0 var(--radius-3) var(--radius-3);
}

/* --------------------------------------------------------------------------
   Toast
   -------------------------------------------------------------------------- */

.toast-wrap {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--bg-1);
    border: 1px solid var(--border-1);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-1);
    box-shadow: var(--shadow-2);
    padding: 10px 14px;
    font-size: 13px;
    min-width: 220px;
    max-width: 340px;
    animation: toast-in .18s ease-out;
    transition: opacity .3s ease, transform .3s ease;
}

.toast.ok { border-left-color: var(--success); }
.toast.err { border-left-color: var(--danger); }
.toast.warn { border-left-color: var(--warning); }

.toast.out {
    opacity: 0;
    transform: translateX(12px);
}

@keyframes toast-in {
    from { opacity: 0; transform: translateX(12px); }
    to { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   登录页
   -------------------------------------------------------------------------- */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-0);
}

.login-box {
    width: 100%;
    max-width: 360px;
}

.login-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.login-brand .brand-name {
    font-size: 18px;
}

.login-card {
    background: var(--bg-1);
    border: 1px solid var(--border-1);
    border-radius: var(--radius-3);
    box-shadow: var(--shadow-1);
    padding: 24px;
}

.login-card .form-field {
    margin-bottom: 14px;
}

.login-card .btn-primary {
    width: 100%;
    height: 36px;
    margin-top: 4px;
}

.login-foot {
    text-align: center;
    color: var(--text-3);
    font-size: 12px;
    margin-top: 16px;
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   其它
   -------------------------------------------------------------------------- */

.pagination {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    min-width: 30px;
    height: 30px;
    padding: 0 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-1);
    border-radius: var(--radius-1);
    background: var(--bg-1);
    font-size: 12.5px;
    color: var(--text-2);
}

.pagination a:hover {
    background: var(--bg-3);
    text-decoration: none;
}

.pagination .current {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 500;
}

.pagination .disabled {
    color: var(--text-3);
    opacity: .6;
}

.kv {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 6px 12px;
    font-size: 13px;
}

.kv dt {
    color: var(--text-3);
}

.kv dd {
    margin: 0;
    word-break: break-all;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2);
    margin: 18px 0 10px;
}

.section-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border-1);
}

.divider {
    height: 1px;
    background: var(--border-1);
    margin: 16px 0;
}

.inline-form {
    display: inline;
}

.route-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.route-line {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 12.5px;
}

.route-line .dns {
    font-family: var(--mono);
    color: var(--text-2);
}

.two-col {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

@media (max-width: 1100px) {
    .two-col {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .sidebar {
        display: none;
    }

    .content {
        padding: 16px;
    }

    .topbar {
        padding: 0 16px;
    }

    .form-grid.cols-2,
    .form-grid.cols-3 {
        grid-template-columns: 1fr;
    }
}