/* ===== CSS Reset & Variables ===== */

/* 暗色主题 (默认) */
:root,
[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --border-color: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-color: #2f81f7;
    --accent-hover: #1f6feb;
    --success-color: #3fb950;
    --warning-color: #d29922;
    --error-color: #f85149;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    --overlay-bg: rgba(13, 17, 23, 0.9);
    --spinner-color: #30363d;
    --spinner-accent: #2f81f7;
    --skeleton-start: #21262d;
    --skeleton-mid: #30363d;
    --gradient-start: #0d1117;
    --gradient-end: #1a1f2e;
}

/* 亮色主题 */
[data-theme="light"] {
    --bg-primary: #f6f8fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f6f8fa;
    --bg-hover: #eaeef2;
    --border-color: #d0d7de;
    --text-primary: #1f2328;
    --text-secondary: #656d76;
    --text-muted: #8b949e;
    --accent-color: #0969da;
    --accent-hover: #0550ae;
    --success-color: #1a7f37;
    --warning-color: #9a6700;
    --error-color: #cf222e;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    --overlay-bg: rgba(255, 255, 255, 0.95);
    --spinner-color: #d0d7de;
    --spinner-accent: #0969da;
    --skeleton-start: #f6f8fa;
    --skeleton-mid: #eaeef2;
    --gradient-start: #f6f8fa;
    --gradient-end: #eef2f5;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* ===== Layout ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 16px;
}

/* ===== Header ===== */
.header {
    text-align: center;
    margin-bottom: 32px;
    position: relative;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--accent-color), #a371f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    margin-top: 8px;
    font-size: 0.95rem;
}

/* ===== Theme Toggle ===== */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 100;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 4px;
    display: flex;
    gap: 2px;
    box-shadow: var(--shadow);
}

.theme-toggle-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.theme-toggle-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.theme-toggle-btn.active {
    background: var(--accent-color);
    color: #fff;
}

/* ===== Cards ===== */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    transition: border-color 0.2s ease, background 0.3s ease;
}

.card:hover {
    border-color: var(--bg-hover);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-header .hint {
    color: var(--text-muted);
    font-size: 0.85rem;
    flex: 1;
}

/* ===== Main IP Section (Single Card Layout) ===== */
.main-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 900px) {
    .main-section {
        grid-template-columns: 1fr 2fr;
    }
}

/* ===== IP Info Card ===== */
.ip-info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: border-color 0.2s ease;
}

.ip-info-card:hover {
    border-color: var(--bg-hover);
}

.ip-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.ip-main {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.ip-flag {
    font-size: 2rem;
    line-height: 1;
}

.ip-address {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-color);
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    word-break: keep-all;
    overflow-wrap: normal;
    white-space: nowrap;
}

.ip-location {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 4px;
}

.ip-isp {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.copy-btn {
    padding: 6px 14px;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.85rem;
}

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

/* ===== Connectivity Section ===== */
.connectivity-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: border-color 0.2s ease;
}

.connectivity-card:hover {
    border-color: var(--bg-hover);
}

.connectivity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
}

.connectivity-item {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transition: transform 0.2s ease;
}

.connectivity-item:hover {
    transform: translateY(-2px);
}

.connectivity-info {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.connectivity-flag {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.connectivity-name {
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.connectivity-latency {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    flex-shrink: 0;
}

.latency-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.latency-value.good { color: var(--success-color); }
.latency-value.bad { color: var(--warning-color); }
.latency-value.timeout { color: var(--error-color); }

/* 延迟等级指示点 */
.latency-dots {
    display: flex;
    gap: 2px;
}

.latency-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--border-color);
}

.latency-dot.active.good { background: var(--success-color); }
.latency-dot.active.bad { background: var(--warning-color); }
.latency-dot.active.timeout { background: var(--error-color); }

/* ===== Diversion IP List ===== */
.diversion-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: border-color 0.2s ease;
}

.diversion-card:hover {
    border-color: var(--bg-hover);
}

.diversion-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.diversion-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 14px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.diversion-item:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.diversion-item .flag {
    font-size: 1rem;
}

/* ===== Section Divider ===== */
.section-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0;
}

/* ===== Website Diversion Table ===== */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.diversion-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.diversion-table thead {
    background: var(--bg-tertiary);
}

.diversion-table th {
    text-align: left;
    padding: 12px 16px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.diversion-table td {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
}

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

.diversion-table tr.domestic {
    border-left: 3px solid var(--success-color);
}

.diversion-table tr.international {
    border-left: 3px solid var(--accent-color);
}

.status-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 8px;
}

.status-indicator.success { background: var(--success-color); }
.status-indicator.failed { background: var(--error-color); }
.status-indicator.pending { background: var(--text-muted); }

.status-indicator::after {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
    opacity: 0.5;
    margin-left: -9px;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(2); opacity: 0; }
}

.site-name-cell {
    font-weight: 500;
}

.site-category {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-left: 4px;
}

.ip-cell {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: var(--accent-color);
}

.location-cell {
    color: var(--text-secondary);
}

/* ===== Refresh Button ===== */
.refresh-btn {
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

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

/* ===== Loading Overlay ===== */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--overlay-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--spinner-color);
    border-top-color: var(--spinner-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

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

.loading-overlay p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    color: var(--text-primary);
    box-shadow: var(--shadow);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 10000;
}

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

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 24px 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 16px;
    }

    .ip-address {
        font-size: 1.4rem;
    }

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

    .diversion-table th,
    .diversion-table td {
        padding: 8px 10px;
        font-size: 0.8rem;
    }

    .theme-toggle {
        top: 12px;
        right: 12px;
    }

    .theme-toggle-btn {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .connectivity-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Skeleton Loading ===== */
.skeleton {
    background: linear-gradient(90deg, var(--skeleton-start) 25%, var(--skeleton-mid) 50%, var(--skeleton-start) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

.skeleton-text {
    height: 12px;
    margin-bottom: 8px;
}

.skeleton-animated {
    animation: loading 1.5s infinite;
}

.skeleton-hidden {
    display: none !important;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* IP Card Skeleton */
.ip-skeleton .ip-address-skeleton {
    height: 36px;
    width: 70%;
    margin-bottom: 16px;
}

.ip-skeleton .ip-info-skeleton {
    height: 14px;
    width: 90%;
    margin-bottom: 8px;
}

.ip-skeleton .ip-info-skeleton.short {
    width: 60%;
}

/* Connectivity Card Skeleton */
.connectivity-skeleton {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.connectivity-skeleton-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 12px;
}

.connectivity-skeleton-item .skeleton {
    height: 14px;
    margin-bottom: 10px;
}

.connectivity-skeleton-item .skeleton.short {
    width: 40%;
    height: 20px;
    margin-bottom: 0;
}

/* Diversion List Skeleton */
.diversion-skeleton {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.diversion-skeleton .skeleton {
    height: 36px;
    width: 160px;
}

/* Table Skeleton */
.table-skeleton-row td {
    padding: 12px 16px;
}

.table-skeleton-row .skeleton {
    height: 14px;
    width: 100%;
}

/* Diversion list display */
.diversion-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

/* IP content display */
.ip-content {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* IP skeleton display */
.ip-skeleton {
    display: block;
}

/* Fade in animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Grid and list fade in */
.connectivity-grid,
.diversion-list,
.diversion-table {
    animation: fadeIn 0.3s ease;
}

/* ===== System Preference (跟随系统) ===== */
@media (prefers-color-scheme: light) {
    [data-theme="system"] {
        --bg-primary: #f6f8fa;
        --bg-secondary: #ffffff;
        --bg-tertiary: #f6f8fa;
        --bg-hover: #eaeef2;
        --border-color: #d0d7de;
        --text-primary: #1f2328;
        --text-secondary: #656d76;
        --text-muted: #8b949e;
        --accent-color: #0969da;
        --accent-hover: #0550ae;
        --success-color: #1a7f37;
        --warning-color: #9a6700;
        --error-color: #cf222e;
        --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        --overlay-bg: rgba(255, 255, 255, 0.95);
        --spinner-color: #d0d7de;
        --spinner-accent: #0969da;
        --skeleton-start: #f6f8fa;
        --skeleton-mid: #eaeef2;
        --gradient-start: #f6f8fa;
        --gradient-end: #eef2f5;
    }
}

@media (prefers-color-scheme: dark) {
    [data-theme="system"] {
        --bg-primary: #0d1117;
        --bg-secondary: #161b22;
        --bg-tertiary: #21262d;
        --bg-hover: #30363d;
        --border-color: #30363d;
        --text-primary: #e6edf3;
        --text-secondary: #8b949e;
        --text-muted: #6e7681;
        --accent-color: #2f81f7;
        --accent-hover: #1f6feb;
        --success-color: #3fb950;
        --warning-color: #d29922;
        --error-color: #f85149;
        --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
        --overlay-bg: rgba(13, 17, 23, 0.9);
        --spinner-color: #30363d;
        --spinner-accent: #2f81f7;
        --skeleton-start: #21262d;
        --skeleton-mid: #30363d;
        --gradient-start: #0d1117;
        --gradient-end: #1a1f2e;
    }
}