:root {
    --bg-main: #0b0f19;
    --bg-card: #111827;
    --bg-input: #1f2937;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --accent: #0ea5e9;
    --accent-hover: #0284c7;
    --border: #374151;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-hover);
}

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

.sidebar {
    width: 260px;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.sidebar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-brand span {
    color: var(--accent);
}

.sidebar-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.2s;
}

.sidebar-link:hover, .sidebar-link.active {
    color: var(--text-main);
    background-color: var(--bg-input);
}

.sidebar-link.active {
    border-left: 3px solid var(--accent);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.main-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.header-title h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

.header-title p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 4px;
}

.grid-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.card-metric {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
}

.card-metric-title {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.card-metric-value {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 8px;
    color: var(--text-main);
}

.card-metric-change {
    font-size: 0.875rem;
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-metric-change.up {
    color: var(--success);
}

.card-metric-change.down {
    color: var(--danger);
}

.panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 32px;
}

.measurement-setting {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 32px;
    padding: 24px 0;
    margin-bottom: 32px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.measurement-setting__copy {
    max-width: 620px;
}

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

.measurement-setting__heading h2 {
    font-size: 1.125rem;
}

.measurement-setting__copy > p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.measurement-setting__status {
    display: inline-flex;
    align-items: center;
    padding: 4px 9px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-main);
    background: var(--bg-input);
}

.measurement-setting__status[data-mode="excluded"] {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.measurement-setting__status[data-mode="debug"] {
    color: var(--warning);
    background: rgba(245, 158, 11, 0.1);
}

.measurement-setting__form {
    display: grid;
    grid-template-columns: minmax(190px, 1fr) auto;
    align-items: end;
    gap: 8px 12px;
}

.measurement-setting__form label {
    grid-column: 1 / -1;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
}

.measurement-setting__form select {
    min-height: 40px;
    padding: 8px 36px 8px 12px;
    color: var(--text-main);
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
}

.measurement-setting__feedback {
    min-height: 20px;
    margin-top: 8px;
}

.measurement-setting__feedback[data-state="success"] {
    color: var(--success);
}

.measurement-setting__feedback[data-state="error"] {
    color: var(--danger);
}

@media (max-width: 760px) {
    .measurement-setting {
        align-items: stretch;
        flex-direction: column;
        gap: 20px;
    }

    .measurement-setting__form {
        grid-template-columns: 1fr;
    }

    .measurement-setting__form label {
        grid-column: auto;
    }
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 16px;
}

.panel-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

th {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-active {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge-suspended {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.badge-pending {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--accent);
    color: var(--text-main);
}

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

.btn-secondary {
    background-color: var(--bg-input);
    color: var(--text-main);
    border: 1px solid var(--border);
}

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

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.2);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-control:focus {
    border-color: var(--accent);
}

.filters-bar {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.filters-bar .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 200px;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
    gap: 8px;
}

.tab-btn {
    padding: 12px 20px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.875rem;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover, .tab-btn.active {
    color: var(--text-main);
}

.tab-btn.active {
    border-bottom-color: var(--accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background-color: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 24px;
}

.timeline-icon {
    position: absolute;
    left: -32px;
    top: 2px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: var(--bg-card);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.timeline-content {
    background-color: var(--bg-input);
    border-radius: 8px;
    padding: 16px;
    border: 1px solid var(--border);
}

.timeline-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

.material-icons-outlined {
    font-family: 'Material Symbols Outlined';
    font-weight: normal;
    font-style: normal;
    font-size: 20px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    -webkit-font-smoothing: antialiased;
}

.email-preview-page {
    display: grid;
    grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.email-list-panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    position: sticky;
    top: 24px;
    max-height: calc(100vh - 88px);
    display: flex;
    flex-direction: column;
}

.email-list-summary {
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.email-list-summary strong {
    font-size: 1.5rem;
    line-height: 1;
}

.email-list-summary span {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.email-list {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.email-list-item {
    display: grid;
    gap: 6px;
    padding: 14px 18px;
    color: var(--text-main);
    border-bottom: 1px solid rgba(55, 65, 81, 0.7);
}

.email-list-item:hover,
.email-list-item.active {
    background-color: var(--bg-input);
    color: var(--text-main);
}

.email-list-item.active {
    box-shadow: inset 3px 0 0 var(--accent);
}

.email-list-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.email-list-meta {
    display: flex;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.email-list-subject {
    color: var(--text-muted);
    font-size: 0.82rem;
    line-height: 1.35;
}

.email-preview-detail {
    min-width: 0;
}

.email-preview-heading {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 22px 24px;
    margin-bottom: 24px;
}

.email-preview-heading h2 {
    font-size: 1.35rem;
    margin-bottom: 6px;
}

.email-preview-heading p {
    color: var(--text-muted);
}

.email-preview-kicker {
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 6px;
}

.email-preview-grid {
    display: grid;
    grid-template-columns: minmax(420px, 1fr) 390px;
    gap: 24px;
    align-items: start;
}

.email-preview-device {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    min-width: 0;
}

.email-device-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.email-device-header .material-symbols-outlined {
    font-size: 20px;
}

.email-preview-device iframe {
    width: 100%;
    height: 720px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background-color: #ffffff;
}

.email-mobile-shell {
    width: 100%;
    max-width: 360px;
    margin: 0 auto;
}

.email-preview-device-mobile iframe {
    height: 720px;
}

.email-text-preview {
    margin-top: 24px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 18px;
}

.email-text-preview summary {
    cursor: pointer;
    font-weight: 600;
}

.email-text-preview pre {
    margin-top: 16px;
    white-space: pre-wrap;
    color: var(--text-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: 0.85rem;
}

@media (max-width: 1180px) {
    .email-preview-page,
    .email-preview-grid {
        grid-template-columns: 1fr;
    }

    .email-list-panel {
        position: static;
        max-height: 420px;
    }

    .email-preview-device-desktop iframe {
        height: 620px;
    }
}

@media (max-width: 760px) {
    .layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }

    .main-content {
        padding: 24px 16px;
    }

    .email-preview-heading,
    .email-preview-device,
    .email-text-preview {
        border-radius: 8px;
    }

    .email-preview-device iframe,
    .email-preview-device-mobile iframe {
        height: 560px;
    }
}