/* ============================================
   Material Design 3 — 管理后台样式
   ============================================ */

/* ----- Material 3 Design Tokens ----- */
:root {
    /* Primary */
    --md-sys-color-primary: #D0BCFF;
    --md-sys-color-on-primary: #381E72;
    --md-sys-color-primary-container: #4F378B;
    --md-sys-color-on-primary-container: #EADDFF;

    /* Secondary */
    --md-sys-color-secondary: #CCC2DC;
    --md-sys-color-on-secondary: #332D41;
    --md-sys-color-secondary-container: #4A4458;
    --md-sys-color-on-secondary-container: #E8DEF8;

    /* Tertiary */
    --md-sys-color-tertiary: #EFB8C8;
    --md-sys-color-on-tertiary: #492532;
    --md-sys-color-tertiary-container: #633B48;
    --md-sys-color-on-tertiary-container: #FFD8E4;

    /* Error */
    --md-sys-color-error: #F2B8B5;
    --md-sys-color-on-error: #601410;
    --md-sys-color-error-container: #8C1D18;
    --md-sys-color-on-error-container: #F9DEDC;

    /* Surface (Dark) */
    --md-sys-color-surface: #141218;
    --md-sys-color-on-surface: #E6E1E5;
    --md-sys-color-surface-variant: #49454F;
    --md-sys-color-on-surface-variant: #CAC4D0;
    --md-sys-color-surface-container: #1E1A24;
    --md-sys-color-surface-container-low: #1B1720;
    --md-sys-color-surface-container-high: #2A2532;
    --md-sys-color-surface-container-highest: #36303E;
    --md-sys-color-inverse-surface: #E6E1E5;
    --md-sys-color-inverse-on-surface: #313033;

    /* Outline */
    --md-sys-color-outline: #938F99;
    --md-sys-color-outline-variant: #49454F;

    /* Elevation (dark mode uses lighter shadows with subtle glow) */
    --md-sys-elevation-1: 0px 1px 2px rgba(0,0,0,0.4), 0px 1px 3px 1px rgba(0,0,0,0.3);
    --md-sys-elevation-2: 0px 1px 2px rgba(0,0,0,0.4), 0px 2px 6px 2px rgba(0,0,0,0.3);
    --md-sys-elevation-3: 0px 4px 8px 3px rgba(0,0,0,0.4), 0px 1px 3px rgba(0,0,0,0.3);

    /* Shape */
    --md-sys-shape-corner-extra-small: 4px;
    --md-sys-shape-corner-small: 8px;
    --md-sys-shape-corner-medium: 12px;
    --md-sys-shape-corner-large: 16px;
    --md-sys-shape-corner-extra-large: 28px;
    --md-sys-shape-corner-full: 9999px;

    /* 字体 (使用系统字体，不依赖外部 Roboto) */
    --md-sys-typescale-display-large: 400 57px/64px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-headline-medium: 400 28px/36px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-title-large: 400 22px/28px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-title-medium: 500 16px/24px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-title-small: 500 14px/20px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-body-large: 400 16px/24px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-body-medium: 400 14px/20px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-body-small: 400 12px/16px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-label-large: 500 14px/20px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-label-medium: 500 12px/16px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --md-sys-typescale-label-small: 500 11px/16px -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Sidebar */
    --sidebar-width: 260px;
    --topbar-height: 64px;

    /* Transitions */
    --md-sys-motion-duration-short: 200ms;
    --md-sys-motion-duration-medium: 400ms;
    --md-sys-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
    --md-sys-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
}

/* ----- Reset & Base ----- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ----- Material Icons ----- */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    font-size: 24px;
    user-select: none;
}

/* ============================================
   Sidebar
   ============================================ */
.m3-sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    height: 100vh;
    background: var(--md-sys-color-surface-container);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--md-sys-color-outline-variant);
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    overflow: hidden;
}

.m3-sidebar-header {
    padding: 24px 16px 16px;
}

.m3-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.m3-logo-icon {
    font-size: 32px;
    color: var(--md-sys-color-primary);
    font-variation-settings: 'FILL' 1;
}

.m3-logo-text {
    display: flex;
    flex-direction: column;
}

.m3-logo-title {
    font: var(--md-sys-typescale-title-medium);
    color: var(--md-sys-color-on-surface);
}

.m3-logo-subtitle {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
}

/* Navigation */
.m3-nav {
    flex: 1;
    padding: 8px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}

.m3-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: none;
    border-radius: var(--md-sys-shape-corner-full);
    background: transparent;
    color: var(--md-sys-color-on-surface-variant);
    cursor: pointer;
    font: var(--md-sys-typescale-label-large);
    text-align: left;
    position: relative;
    overflow: hidden;
    transition: background var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
    outline: none;
}

.m3-nav-item:hover {
    background: var(--md-sys-color-surface-container-high);
}

.m3-nav-item:focus-visible {
    background: var(--md-sys-color-surface-container-high);
    outline: 2px solid var(--md-sys-color-primary);
    outline-offset: -2px;
}

.m3-nav-item.active {
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

.m3-nav-item.active .m3-nav-icon {
    font-variation-settings: 'FILL' 1;
    color: var(--md-sys-color-on-secondary-container);
}

.m3-nav-icon {
    font-size: 24px;
    color: var(--md-sys-color-on-surface-variant);
}

.m3-nav-label {
    flex: 1;
}

.m3-nav-badge {
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    font: var(--md-sys-typescale-label-small);
    padding: 2px 8px;
    border-radius: var(--md-sys-shape-corner-full);
    min-width: 24px;
    text-align: center;
}

.m3-nav-item.active .m3-nav-badge {
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
}

.m3-nav-ripple {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

/* Sidebar Footer */
.m3-sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--md-sys-color-outline-variant);
}

.m3-server-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-surface-container-low);
}

.m3-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.m3-status-dot.online {
    background: #34A853;
    box-shadow: 0 0 6px #34A853;
}

.m3-status-dot.offline {
    background: #EA4335;
    box-shadow: 0 0 6px #EA4335;
}

.m3-status-text {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
}

/* ============================================
   Main Content Area
   ============================================ */
.m3-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--md-sys-color-surface);
}

/* Top Bar */
.m3-topbar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: var(--md-sys-color-surface);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    position: sticky;
    top: 0;
    z-index: 50;
}

.m3-topbar-start {
    display: flex;
    align-items: center;
    gap: 16px;
}

.m3-page-title {
    font: var(--md-sys-typescale-title-large);
    color: var(--md-sys-color-on-surface);
}

.m3-topbar-end {
    display: flex;
    align-items: center;
    gap: 8px;
}

.m3-time-text {
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
}

.m3-clock {
    font-size: 20px;
    color: var(--md-sys-color-on-surface-variant);
}

/* Icon Button */
.m3-icon-button {
    width: 40px;
    height: 40px;
    border-radius: var(--md-sys-shape-corner-full);
    border: none;
    background: transparent;
    color: var(--md-sys-color-on-surface-variant);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.m3-icon-button:hover {
    background: var(--md-sys-color-surface-container-high);
}

.m3-icon-button:active {
    background: var(--md-sys-color-surface-container-highest, #E6E0EB);
}

/* ============================================
   Content Area
   ============================================ */
.m3-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Page Visibility */
.m3-page {
    display: none;
    animation: fadeSlideIn var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
}

.m3-page.active {
    display: block;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Card
   ============================================ */
.m3-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.m3-card-grid-2col {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 900px) {
    .m3-card-grid-2col {
        grid-template-columns: 1fr;
    }
}

.m3-card {
    border-radius: var(--md-sys-shape-corner-medium);
    background: var(--md-sys-color-surface);
    overflow: hidden;
}

.m3-card-elevated {
    box-shadow: var(--md-sys-elevation-1);
}

.m3-card-filled {
    background: var(--md-sys-color-surface-container-low);
}

.m3-card-outlined {
    border: 1px solid var(--md-sys-color-outline-variant);
}

.m3-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px 0;
    flex-wrap: wrap;
    gap: 8px;
}

.m3-card-title {
    font: var(--md-sys-typescale-title-medium);
    color: var(--md-sys-color-on-surface);
}

.m3-card-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.m3-card-content {
    padding: 20px 24px;
}

.m3-card-body {
    padding: 16px 24px 24px;
}

.m3-card-body.no-padding {
    padding: 0;
}

/* ----- Stat Card ----- */
.stat-card-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.m3-stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--md-sys-shape-corner-large);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.m3-stat-info {
    flex: 1;
    min-width: 0;
}

.m3-stat-label {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 4px;
}

.m3-stat-value {
    font: var(--md-sys-typescale-headline-medium);
    color: var(--md-sys-color-on-surface);
    font-size: 24px;
}

.m3-stat-sub {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: 2px;
}

/* ----- List ----- */
.m3-list {
    display: flex;
    flex-direction: column;
}

.m3-list-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 24px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    transition: background var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.m3-list-item:last-child {
    border-bottom: none;
}

.m3-list-item:hover {
    background: var(--md-sys-color-surface-container);
}

.m3-list-item.m3-clickable {
    cursor: pointer;
}

.m3-list-item.m3-clickable:hover {
    background: var(--md-sys-color-surface-container-high);
}

.m3-list-item-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--md-sys-shape-corner-full);
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    font: var(--md-sys-typescale-title-small);
    flex-shrink: 0;
}

.m3-list-item-text {
    flex: 1;
    min-width: 0;
}

.m3-list-item-title {
    font: var(--md-sys-typescale-body-large);
    color: var(--md-sys-color-on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.m3-list-item-subtitle {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
}

.m3-list-empty {
    padding: 32px 24px;
    text-align: center;
    color: var(--md-sys-color-on-surface-variant);
    font: var(--md-sys-typescale-body-medium);
}

/* ============================================
   Timeline (Activity Feed)
   ============================================ */
.m3-timeline {
    display: flex;
    flex-direction: column;
    padding: 8px 0;
}

.m3-timeline-empty {
    padding: 48px 24px;
    text-align: center;
    color: var(--md-sys-color-on-surface-variant);
    font: var(--md-sys-typescale-body-medium);
}

.m3-timeline-item {
    display: flex;
    gap: 16px;
    padding: 10px 24px;
    position: relative;
    transition: background var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.m3-timeline-item:hover {
    background: var(--md-sys-color-surface-container);
}

.m3-timeline-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

/* vertical connecting line between dots */
.m3-timeline-item::before {
    content: '';
    position: absolute;
    left: 29px;
    top: 28px;
    bottom: -8px;
    width: 1px;
    background: var(--md-sys-color-outline-variant);
}

.m3-timeline-item:last-child::before {
    display: none;
}

.m3-timeline-content {
    flex: 1;
    min-width: 0;
}

.m3-timeline-header {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.m3-timeline-icon {
    font-size: 14px;
}

.m3-timeline-actor {
    font: var(--md-sys-typescale-label-large);
    color: var(--md-sys-color-on-surface);
}

.m3-timeline-actor:hover {
    text-decoration: underline;
    color: var(--md-sys-color-primary);
}

.m3-timeline-time {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    margin-left: auto;
}

.m3-timeline-detail {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: 2px;
}

/* ============================================
   Table
   ============================================ */
.m3-table-wrapper {
    overflow-x: auto;
}

.m3-table {
    width: 100%;
    border-collapse: collapse;
    font: var(--md-sys-typescale-body-medium);
}

.m3-table thead {
    background: var(--md-sys-color-surface-container-high);
}

.m3-table th {
    padding: 12px 24px;
    text-align: left;
    font: var(--md-sys-typescale-label-medium);
    color: var(--md-sys-color-on-surface-variant);
    border-bottom: 2px solid var(--md-sys-color-outline-variant);
    white-space: nowrap;
}

.m3-table td {
    padding: 14px 24px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    color: var(--md-sys-color-on-surface);
}

.m3-table tbody tr {
    transition: background var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.m3-table tbody tr:hover {
    background: var(--md-sys-color-surface-container);
}

.m3-table-row-clickable {
    cursor: pointer;
}

.m3-table-row-clickable:hover {
    background: var(--md-sys-color-surface-container-high) !important;
}

.m3-table-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 48px 24px;
    color: var(--md-sys-color-on-surface-variant);
}

.m3-table-empty .material-symbols-outlined {
    font-size: 48px;
    opacity: 0.5;
}

/* ============================================
   Chip
   ============================================ */
.m3-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
    font: var(--md-sys-typescale-label-medium);
    white-space: nowrap;
}

.m3-chip-success {
    background: #0D3520;
    color: #6EE7B7;
}

.m3-chip-warning {
    background: #3D2E00;
    color: #FCD34D;
}

.m3-chip-error {
    background: var(--md-sys-color-error-container);
    color: var(--md-sys-color-on-error-container);
}

.m3-chip-info {
    background: #0C2444;
    color: #93C5FD;
}

/* ============================================
   Button
   ============================================ */
.m3-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--md-sys-shape-corner-full);
    font: var(--md-sys-typescale-label-large);
    cursor: pointer;
    transition: all var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
    white-space: nowrap;
    height: 40px;
}

.m3-button-filled {
    background: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    box-shadow: var(--md-sys-elevation-1);
}

.m3-button-filled:hover {
    box-shadow: var(--md-sys-elevation-2);
    filter: brightness(1.08);
}

.m3-button-filled:active {
    box-shadow: var(--md-sys-elevation-1);
}

.m3-button-tonal {
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

.m3-button-tonal:hover {
    filter: brightness(0.95);
}

.m3-button-text {
    background: transparent;
    color: var(--md-sys-color-primary);
}

.m3-button-text:hover {
    background: var(--md-sys-color-primary-container);
}

.m3-button-text.danger {
    color: var(--md-sys-color-error);
}

.m3-button-text.danger:hover {
    background: var(--md-sys-color-error-container);
}

/* ============================================
   Segmented Button
   ============================================ */
.m3-segmented-button {
    display: flex;
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-full);
    overflow: hidden;
}

.m3-segment {
    padding: 6px 16px;
    border: none;
    background: transparent;
    color: var(--md-sys-color-on-surface);
    font: var(--md-sys-typescale-label-large);
    cursor: pointer;
    transition: background var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
    border-right: 1px solid var(--md-sys-color-outline);
}

.m3-segment:last-child {
    border-right: none;
}

.m3-segment.selected {
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

.m3-segment:hover:not(.selected) {
    background: var(--md-sys-color-surface-container-highest, #E6E0EB);
}

/* ============================================
   Dialog (Modal)
   ============================================ */
.m3-dialog {
    background: var(--md-sys-color-surface-container-high);
    color: var(--md-sys-color-on-surface);
    border: none;
    border-radius: var(--md-sys-shape-corner-extra-large);
    box-shadow: var(--md-sys-elevation-3);
    max-width: 640px;
    width: 90%;
    max-height: 80vh;
    padding: 0;
    overflow: hidden;
}

.m3-dialog::backdrop {
    background: rgba(0, 0, 0, 0.6);
}

.m3-dialog[open] {
    display: flex;
    flex-direction: column;
    margin: auto;
    animation: dialogIn var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-emphasized);
}

@keyframes dialogIn {
    from {
        opacity: 0;
        transform: scale(0.92);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.m3-dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 24px 0;
    flex-shrink: 0;
}

.m3-dialog-title {
    font: var(--md-sys-typescale-title-large);
    color: var(--md-sys-color-on-surface);
}

.m3-dialog-body {
    padding: 16px 24px;
    overflow-y: auto;
    flex: 1 1 auto;
    min-height: 0;
}

.m3-dialog-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 24px 24px;
    flex-shrink: 0;
}

/* ============================================
   Text Field (Material 3 — Outlined)
   ============================================ */
.m3-text-field-wrap {
    margin-top: 4px;
}

.m3-text-field {
    width: 100%;
    height: 56px;
    padding: 0 16px;
    background: var(--md-sys-color-surface-container-highest);
    color: var(--md-sys-color-on-surface);
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-corner-extra-small);
    font: var(--md-sys-typescale-body-large);
    outline: none;
    box-sizing: border-box;
    transition: border-color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
                box-shadow var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.m3-text-field::placeholder {
    color: var(--md-sys-color-on-surface-variant);
    opacity: 1;
}

.m3-text-field:hover {
    border-color: var(--md-sys-color-on-surface);
}

.m3-text-field:focus {
    border-color: var(--md-sys-color-primary);
    box-shadow: 0 0 0 1px var(--md-sys-color-primary);
}

.m3-text-field.m3-text-field-textarea {
    height: auto;
    min-height: 96px;
    padding: 12px 16px;
    line-height: 1.5;
    resize: vertical;
    font-family: inherit;
}

.m3-field-label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    color: var(--md-sys-color-on-surface-variant);
}

.m3-restart-status {
    margin-top: 20px;
    padding: 16px;
    border-radius: var(--md-sys-shape-corner-medium);
    background: var(--md-sys-color-secondary-container);
    color: var(--md-sys-color-on-secondary-container);
}

.m3-restart-status-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    margin-bottom: 12px;
}

.m3-restart-status-row {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    padding: 4px 0;
}

.m3-restart-countdown {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.m3-restart-status-reason {
    font-size: 13px;
    opacity: 0.85;
    margin: 8px 0;
}

.m3-restart-status .m3-button {
    margin-top: 12px;
}

/* ============================================
   Login Dialog (Material 3)
   ============================================ */
.m3-login-dialog {
    max-width: 400px;
    width: 90%;
}

.m3-dialog-subtitle {
    margin: 0 0 16px;
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
}

.m3-login-error {
    color: var(--md-sys-color-error);
    font: var(--md-sys-typescale-body-small);
    min-height: 18px;
    margin: 8px 0 0;
}

/* Dialog Content Styles */
.dialog-section {
    margin-bottom: 20px;
}

.dialog-section-title {
    font: var(--md-sys-typescale-title-small);
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
}

.dialog-field {
    display: flex;
    align-items: center;
    padding: 8px 0;
    font: var(--md-sys-typescale-body-medium);
}

.dialog-field-label {
    color: var(--md-sys-color-on-surface-variant);
    width: 120px;
    flex-shrink: 0;
}

.dialog-field-value {
    color: var(--md-sys-color-on-surface);
}

.dialog-properties-editor {
    width: 100%;
    min-height: 150px;
    font-family: 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
    font-size: 13px;
    padding: 12px;
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    resize: vertical;
    line-height: 1.5;
}

.dialog-properties-editor:focus {
    outline: 2px solid var(--md-sys-color-primary);
    outline-offset: -2px;
}

.dialog-hint {
    font: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    margin-top: 6px;
}

.dialog-player-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dialog-player-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: var(--md-sys-shape-corner-small);
    background: var(--md-sys-color-surface-container);
    font: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface);
}

/* ============================================
   Log Container
   ============================================ */
.m3-log-container {
    max-height: calc(100vh - 280px);
    min-height: 400px;
    overflow-y: auto;
    background: #0D0D0D;
    padding: 16px;
    font-family: 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.6;
}

.m3-log-container::-webkit-scrollbar {
    width: 8px;
}

.m3-log-container::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.m3-log-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

.m3-log-container::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

.m3-log-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 48px;
    color: rgba(255, 255, 255, 0.3);
}

.m3-log-empty .material-symbols-outlined {
    font-size: 48px;
}

.m3-log-entry {
    padding: 6px 12px;
    margin-bottom: 4px;
    border-radius: var(--md-sys-shape-corner-extra-small);
    border-left: 3px solid transparent;
    transition: background 0.15s;
    display: flex;
    gap: 8px;
    align-items: baseline;
}

.m3-log-entry:hover {
    background: rgba(255, 255, 255, 0.05);
}

.m3-log-time {
    color: rgba(255, 255, 255, 0.4);
    font-size: 12px;
    flex-shrink: 0;
}

.m3-log-level {
    font-weight: 600;
    flex-shrink: 0;
    min-width: 48px;
}

.m3-log-message {
    color: rgba(255, 255, 255, 0.87);
    word-break: break-word;
}

.log-info {
    border-left-color: #2196F3;
}

.log-info .m3-log-level {
    color: #64B5F6;
}

.log-warning {
    border-left-color: #FF9800;
    background: rgba(255, 152, 0, 0.08);
}

.log-warning .m3-log-level {
    color: #FFB74D;
}

.log-error {
    border-left-color: #F44336;
    background: rgba(244, 67, 54, 0.08);
}

.log-error .m3-log-level {
    color: #E57373;
}

/* ============================================
   Snackbar (Toast)
   ============================================ */
.m3-snackbar {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--md-sys-color-inverse-surface);
    color: var(--md-sys-color-inverse-on-surface);
    padding: 14px 24px;
    border-radius: var(--md-sys-shape-corner-extra-small);
    box-shadow: var(--md-sys-elevation-3);
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 3000;
    transition: transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
    max-width: 500px;
}

.m3-snackbar.show {
    transform: translateX(-50%) translateY(0);
}

.m3-snackbar-text {
    font: var(--md-sys-typescale-body-medium);
    flex: 1;
}

.m3-snackbar-action {
    background: none;
    border: none;
    color: var(--md-sys-color-primary-container);
    font: var(--md-sys-typescale-label-large);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--md-sys-shape-corner-extra-small);
}

.m3-snackbar-action:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Loading Spinner
   ============================================ */
.m3-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--md-sys-color-surface-container-high);
    border-top-color: var(--md-sys-color-primary);
    border-radius: 50%;
    animation: m3-spin 0.8s linear infinite;
}

@keyframes m3-spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
    }

    .m3-sidebar {
        transform: translateX(-100%);
        transition: transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
    }

    .m3-sidebar.open {
        transform: translateX(0);
        --sidebar-width: 260px;
    }

    .m3-main {
        margin-left: 0;
    }

    .m3-content {
        padding: 16px;
    }

    .m3-card-grid {
        grid-template-columns: 1fr;
    }

    .m3-topbar {
        padding: 0 16px;
    }

    .m3-page-title {
        font-size: 18px;
    }

    .m3-table th,
    .m3-table td {
        padding: 10px 12px;
    }
}

/* ============================================
   举报审核（reports）
   ============================================ */
.m3-drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.m3-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(680px, 100vw);
    background: var(--md-sys-color-surface);
    color: var(--md-sys-color-on-surface);
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.4);
    z-index: 100;
    transform: translateX(105%);
    transition: transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
    display: flex;
    flex-direction: column;
}

.m3-drawer.open {
    transform: translateX(0);
}

.m3-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.m3-drawer-header h3 {
    margin: 0;
    font: var(--md-sys-typescale-title-large);
}

.m3-drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.report-status-chip {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: var(--md-sys-shape-corner-full);
    font: var(--md-sys-typescale-label-small);
    white-space: nowrap;
}

.report-status-pending { background: #3D2E00; color: #FCD34D; }
.report-status-reviewing { background: #0C2444; color: #93C5FD; }
.report-status-resolved { background: #0D3520; color: #6EE7B7; }
.report-status-rejected { background: var(--md-sys-color-error-container); color: var(--md-sys-color-on-error-container); }

.report-detail-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.report-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}

.report-info-item {
    background: var(--md-sys-color-surface-container-high);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 10px 14px;
}

.report-info-item span {
    display: block;
    font-size: 12px;
    opacity: 0.6;
    margin-bottom: 4px;
}

.report-note {
    background: var(--md-sys-color-surface-container-high);
    border-radius: var(--md-sys-shape-corner-medium);
    padding: 10px 14px;
    margin-bottom: 16px;
}

.report-note span {
    font-size: 12px;
    opacity: 0.6;
    display: block;
    margin-bottom: 4px;
}

.report-note p {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-all;
}

.report-section-title {
    font: var(--md-sys-typescale-title-medium);
    margin: 18px 0 10px;
}

.report-type-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.report-timeline {
    border-left: 2px solid var(--md-sys-color-outline-variant);
    padding-left: 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.report-timeline-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.report-timeline-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--md-sys-color-on-primary-container);
}

.report-timeline-title {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
}

.report-timeline-time {
    font-size: 12px;
    opacity: 0.6;
}

.report-timeline-detail {
    font-size: 13px;
    opacity: 0.9;
    word-break: break-all;
    white-space: pre-wrap;
    margin-top: 2px;
}

.report-timeline-meta {
    font-size: 12px;
    opacity: 0.5;
    margin-top: 2px;
}

.report-detail-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--md-sys-color-outline-variant);
}

.m3-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    font-weight: 500;
    flex-shrink: 0;
    text-transform: uppercase;
}