/* ============================================================
   CDN Master - User Portal Styles
   Design Reference: Alibaba Cloud / Tencent Cloud / AWS Console
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
    --u-primary: #4f6ef7;
    --u-primary-hover: #3b5de7;
    --u-primary-light: #eef1fe;
    --u-primary-bg: #f5f7ff;
    --u-success: #00b42a;
    --u-success-bg: #e8f8ef;
    --u-warning: #ff7d00;
    --u-warning-bg: #fff3e0;
    --u-danger: #f53f3f;
    --u-danger-bg: #ffece8;
    --u-info: #3491fa;
    --u-info-bg: #e8f3ff;

    --u-bg-page: #f2f3f5;
    --u-bg-card: #ffffff;
    --u-bg-card-hover: #fafbfc;
    --u-bg-section: #f7f8fa;
    --u-bg-input: #f2f3f5;

    --u-border: #e5e6eb;
    --u-border-light: #f2f3f5;
    --u-border-focus: #4f6ef7;

    --u-text-1: #1d2129;
    --u-text-2: #4e5969;
    --u-text-3: #86909c;
    --u-text-4: #c9cdd4;

    --u-radius-sm: 6px;
    --u-radius-md: 8px;
    --u-radius-lg: 12px;
    --u-radius-xl: 16px;

    --u-shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --u-shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --u-shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
    --u-shadow-xl: 0 12px 36px rgba(0,0,0,0.1);

    --u-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --u-font-mono: 'SFMono-Regular', 'SF Mono', 'Menlo', 'Consolas', 'Monaco', monospace;

    --u-header-h: 56px;
    --u-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Global ---------- */
.u-layout {
    font-family: var(--u-font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--u-text-1);
    background: var(--u-bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--u-primary); text-decoration: none; transition: var(--u-transition); }
a:hover { color: var(--u-primary-hover); }

/* ---------- Header ---------- */
.u-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--u-header-h);
    background: #fff;
    border-bottom: 1px solid var(--u-border-light);
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.u-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
}

.u-header-left {
    display: flex;
    align-items: center;
    gap: 32px;
    height: 100%;
}

.u-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--u-text-1);
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: -0.3px;
    white-space: nowrap;
}
.u-brand:hover { color: var(--u-primary); }

.u-brand-icon {
    width: 28px;
    height: 28px;
    color: var(--u-primary);
    flex-shrink: 0;
}

.u-nav {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 4px;
}

.u-nav-item {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 100%;
    padding: 0 16px;
    color: var(--u-text-2);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: var(--u-transition);
    white-space: nowrap;
}
.u-nav-item:hover {
    color: var(--u-primary);
    background: var(--u-primary-light);
}
.u-nav-item.active {
    color: var(--u-primary);
    border-bottom-color: var(--u-primary);
}
.u-nav-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.u-header-right {
    display: flex;
    align-items: center;
}

.u-user-menu {
    position: relative;
}

.u-user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border: 1px solid var(--u-border);
    border-radius: var(--u-radius-lg);
    background: #fff;
    cursor: pointer;
    transition: var(--u-transition);
    font-family: inherit;
    font-size: 13px;
    color: var(--u-text-2);
}
.u-user-btn:hover {
    border-color: var(--u-primary);
    color: var(--u-primary);
    box-shadow: 0 0 0 3px rgba(79,110,247,0.08);
}

.u-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--u-primary), #7c5cfc);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
}

.u-user-name {
    font-weight: 500;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.u-user-btn svg {
    width: 14px;
    height: 14px;
    transition: transform 0.2s;
}

.u-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: #fff;
    border: 1px solid var(--u-border);
    border-radius: var(--u-radius-lg);
    box-shadow: var(--u-shadow-lg);
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: var(--u-transition);
}
.u-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.u-dropdown a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: var(--u-radius-md);
    color: var(--u-text-2);
    font-size: 13px;
    text-decoration: none;
    transition: var(--u-transition);
}
.u-dropdown a:hover {
    background: var(--u-bg-section);
    color: var(--u-text-1);
}
.u-dropdown a svg {
    width: 16px;
    height: 16px;
    color: var(--u-text-3);
}
.u-dropdown a:hover svg {
    color: var(--u-text-2);
}

/* ---------- Body ---------- */
.u-body {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 28px 32px 40px;
}

/* ---------- Footer ---------- */
.u-footer {
    border-top: 1px solid var(--u-border-light);
    padding: 20px 0;
    text-align: center;
    color: var(--u-text-4);
    font-size: 12px;
    background: #fff;
}
.u-footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ============================================================
   Page Header
   ============================================================ */
.u-page-header {
    margin-bottom: 24px;
}
.u-page-header h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--u-text-1);
    margin: 0 0 4px;
}
.u-page-header p {
    color: var(--u-text-3);
    font-size: 14px;
    margin: 0;
}

/* ============================================================
   Stat Cards (Dashboard)
   ============================================================ */
.u-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.u-stat-card {
    background: var(--u-bg-card);
    border: 1px solid var(--u-border-light);
    border-radius: var(--u-radius-lg);
    padding: 20px 24px;
    transition: var(--u-transition);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 16px;
}
.u-stat-card:hover {
    box-shadow: var(--u-shadow-md);
    transform: translateY(-2px);
    border-color: var(--u-border);
    text-decoration: none;
    color: inherit;
}

.u-stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--u-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.u-stat-icon svg {
    width: 24px;
    height: 24px;
}
.u-stat-icon.blue { background: var(--u-primary-light); color: var(--u-primary); }
.u-stat-icon.green { background: var(--u-success-bg); color: var(--u-success); }
.u-stat-icon.orange { background: var(--u-warning-bg); color: var(--u-warning); }
.u-stat-icon.purple { background: #f3e8ff; color: #7c3aed; }

.u-stat-info {
    flex: 1;
    min-width: 0;
}
.u-stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--u-text-1);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}
.u-stat-label {
    font-size: 13px;
    color: var(--u-text-3);
    margin-top: 2px;
}

/* ============================================================
   Card Component
   ============================================================ */
.u-card {
    background: var(--u-bg-card);
    border: 1px solid var(--u-border-light);
    border-radius: var(--u-radius-lg);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--u-transition);
}
.u-card:hover {
    box-shadow: var(--u-shadow-sm);
}

.u-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--u-border-light);
    min-height: 52px;
}

.u-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--u-text-1);
    display: flex;
    align-items: center;
    gap: 8px;
}
.u-card-title svg {
    width: 18px;
    height: 18px;
    color: var(--u-primary);
    flex-shrink: 0;
}

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

.u-card-body {
    padding: 20px 24px;
}

/* ============================================================
   Buttons
   ============================================================ */
.u-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0 16px;
    height: 34px;
    border-radius: var(--u-radius-md);
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--u-transition);
    text-decoration: none;
    white-space: nowrap;
    line-height: 1;
}
.u-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.u-btn-primary {
    background: var(--u-primary);
    color: #fff;
}
.u-btn-primary:hover {
    background: var(--u-primary-hover);
    box-shadow: 0 2px 8px rgba(79,110,247,0.3);
    color: #fff;
}

.u-btn-outline {
    background: #fff;
    color: var(--u-text-2);
    border-color: var(--u-border);
}
.u-btn-outline:hover {
    color: var(--u-primary);
    border-color: var(--u-primary);
    background: var(--u-primary-light);
}

.u-btn-ghost {
    background: transparent;
    color: var(--u-text-3);
    border: none;
    padding: 0 10px;
}
.u-btn-ghost:hover {
    color: var(--u-primary);
    background: var(--u-primary-light);
}

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

.u-btn-sm {
    height: 28px;
    padding: 0 10px;
    font-size: 12px;
    border-radius: var(--u-radius-sm);
}
.u-btn-sm svg {
    width: 13px;
    height: 13px;
}

.u-btn svg {
    width: 14px;
    height: 14px;
}

/* ============================================================
   Table
   ============================================================ */
.u-table {
    width: 100%;
    border-collapse: collapse;
}
.u-table thead th {
    background: var(--u-bg-section);
    font-size: 12px;
    font-weight: 600;
    color: var(--u-text-3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--u-border);
    white-space: nowrap;
}
.u-table tbody td {
    padding: 14px 16px;
    font-size: 13px;
    color: var(--u-text-1);
    border-bottom: 1px solid var(--u-border-light);
    vertical-align: middle;
}
.u-table tbody tr:last-child td {
    border-bottom: none;
}
.u-table tbody tr {
    transition: background 0.15s;
}
.u-table tbody tr:hover {
    background: var(--u-bg-card-hover);
}

/* ============================================================
   Badges / Status
   ============================================================ */
.u-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
    white-space: nowrap;
}
.u-badge-success { background: var(--u-success-bg); color: var(--u-success); }
.u-badge-warning { background: var(--u-warning-bg); color: var(--u-warning); }
.u-badge-danger { background: var(--u-danger-bg); color: var(--u-danger); }
.u-badge-info { background: var(--u-info-bg); color: var(--u-info); }
.u-badge-default { background: var(--u-bg-section); color: var(--u-text-3); }

.u-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-right: 6px;
    flex-shrink: 0;
}
.u-badge-dot.green { background: var(--u-success); }
.u-badge-dot.orange { background: var(--u-warning); }
.u-badge-dot.red { background: var(--u-danger); }
.u-badge-dot.blue { background: var(--u-info); }
.u-badge-dot.gray { background: var(--u-text-4); }

/* ============================================================
   Token Display
   ============================================================ */
.u-token-card {
    border-top: 3px solid var(--u-primary);
}
.u-token-row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.u-token-value {
    flex: 1;
    font-family: var(--u-font-mono);
    font-size: 13px;
    color: var(--u-text-1);
    background: var(--u-bg-section);
    border: 1px solid var(--u-border);
    border-radius: var(--u-radius-sm);
    padding: 10px 14px;
    word-break: break-all;
    line-height: 1.6;
}
.u-token-hint {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    margin-top: 12px;
    color: var(--u-text-3);
    font-size: 12px;
    line-height: 1.6;
}
.u-token-hint svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--u-text-4);
}

/* ============================================================
   Empty State
   ============================================================ */
.u-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--u-text-3);
}
.u-empty svg {
    width: 64px;
    height: 64px;
    color: var(--u-text-4);
    margin-bottom: 16px;
}
.u-empty h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--u-text-2);
    margin: 0 0 6px;
}
.u-empty p {
    font-size: 13px;
    color: var(--u-text-3);
    margin: 0;
}

/* ============================================================
   Domain Row (card-style table)
   ============================================================ */
.u-domain-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--u-text-1);
}
.u-domain-origin {
    font-size: 12px;
    color: var(--u-text-3);
    font-family: var(--u-font-mono);
}

/* ============================================================
   Form Styles (for user pages)
   ============================================================ */
.u-form-section {
    background: var(--u-bg-card);
    border: 1px solid var(--u-border-light);
    border-radius: var(--u-radius-lg);
    padding: 28px 32px;
}

.u-form-group {
    margin-bottom: 20px;
}
.u-form-group:last-child {
    margin-bottom: 0;
}
.u-form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--u-text-2);
    margin-bottom: 6px;
}
.u-form-label .required {
    color: var(--u-danger);
    margin-left: 2px;
}

.u-form-input {
    display: block;
    width: 100%;
    height: 38px;
    padding: 0 14px;
    border: 1px solid var(--u-border);
    border-radius: var(--u-radius-md);
    font-family: inherit;
    font-size: 14px;
    color: var(--u-text-1);
    background: #fff;
    transition: var(--u-transition);
    outline: none;
    box-sizing: border-box;
}
.u-form-input:focus {
    border-color: var(--u-border-focus);
    box-shadow: 0 0 0 3px rgba(79,110,247,0.1);
}
.u-form-input::placeholder {
    color: var(--u-text-4);
}
.u-form-hint {
    font-size: 12px;
    color: var(--u-text-3);
    margin-top: 4px;
}

.u-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.u-form-switch-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
}
.u-form-switch-label {
    font-size: 14px;
    color: var(--u-text-1);
}
.u-form-switch-desc {
    font-size: 12px;
    color: var(--u-text-3);
    margin-top: 2px;
}

.u-form-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--u-border-light);
}

/* ============================================================
   Pagination
   ============================================================ */
.u-pagination-wrap {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--u-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.u-pagination-info {
    font-size: 13px;
    color: var(--u-text-3);
}

/* ============================================================
   Section Header with Actions
   ============================================================ */
.u-section {
    margin-bottom: 24px;
}
.u-section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.u-section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--u-text-1);
}

/* ============================================================
   Link Button
   ============================================================ */
.u-link {
    color: var(--u-primary);
    font-size: 13px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.u-link:hover {
    color: var(--u-primary-hover);
    text-decoration: underline;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
    .u-header-inner {
        padding: 0 16px;
    }
    .u-header-left {
        gap: 16px;
    }
    .u-nav-item {
        padding: 0 10px;
        font-size: 13px;
    }
    .u-nav-item span {
        display: none;
    }
    .u-body {
        padding: 16px;
    }
    .u-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .u-stat-card {
        padding: 16px;
    }
    .u-stat-value {
        font-size: 22px;
    }
    .u-card-head {
        padding: 14px 16px;
    }
    .u-card-body {
        padding: 16px;
    }
    .u-form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .u-form-section {
        padding: 20px;
    }
    .u-table thead th,
    .u-table tbody td {
        padding: 10px 12px;
    }
}

@media (max-width: 480px) {
    .u-stats-grid {
        grid-template-columns: 1fr;
    }
    .u-brand span {
        display: none;
    }
    .u-welcome {
        padding: 24px 20px !important;
    }
    .u-welcome h1 {
        font-size: 18px !important;
    }
    .u-welcome svg {
        display: none;
    }
}

/* ============================================================
   Welcome Banner
   ============================================================ */
.u-welcome {
    transition: var(--u-transition);
}
.u-welcome:hover {
    box-shadow: 0 8px 32px rgba(79,110,247,0.25);
}

/* ============================================================
   Scrollbar (user pages)
   ============================================================ */
.u-layout ::-webkit-scrollbar { width: 6px; height: 6px; }
.u-layout ::-webkit-scrollbar-track { background: transparent; }
.u-layout ::-webkit-scrollbar-thumb { background: #d0d5dd; border-radius: 3px; }
.u-layout ::-webkit-scrollbar-thumb:hover { background: #98a2b3; }

/* ============================================================
   Selection
   ============================================================ */
.u-layout ::selection {
    background: rgba(79,110,247,0.15);
    color: var(--u-text-1);
}