:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --text: #17202a;
    --muted: #657282;
    --border: #d8dee6;
    --primary: #176b87;
    --primary-strong: #0e4d64;
    --secondary: #334155;
    --danger: #b42318;
    --danger-strong: #8f1d14;
    --success-bg: #e8f7ef;
    --success-text: #13633b;
    --error-bg: #fff0f0;
    --error-text: #a11f2b;
    --warning-bg: #fff7df;
    --warning-text: #765514;
    --shadow: 0 18px 45px rgba(16, 24, 40, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.55;
}

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

a:hover {
    text-decoration: underline;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
    padding: 0 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.brand {
    color: var(--text);
    font-weight: 700;
}

.topnav {
    display: flex;
    gap: 16px;
}

.page {
    width: min(1080px, calc(100% - 32px));
    margin: 48px auto;
}

.page-narrow {
    width: min(560px, calc(100% - 32px));
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 28px;
}

.auth-panel {
    width: min(520px, 100%);
    margin: 0 auto;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

h1,
h2 {
    margin: 0 0 12px;
    line-height: 1.2;
}

h1 {
    font-size: 32px;
}

h2 {
    font-size: 22px;
}

.muted {
    color: var(--muted);
    margin-top: 0;
}

.form {
    display: grid;
    gap: 10px;
    margin-top: 24px;
}

label {
    color: var(--text);
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 12px;
    color: var(--text);
    background: var(--surface);
    font: inherit;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
    outline: 3px solid rgba(23, 107, 135, 0.16);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    border: 0;
    border-radius: 6px;
    padding: 10px 16px;
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    text-decoration: none;
}

.button:hover {
    text-decoration: none;
}

.button-primary {
    background: var(--primary);
    color: #ffffff;
}

.button-primary:hover {
    background: var(--primary-strong);
}

.button-light {
    background: #eef2f6;
    color: var(--secondary);
}

.button-light:hover {
    background: #e1e8f0;
}

.button-danger {
    background: var(--danger);
    color: #ffffff;
}

.button-danger:hover {
    background: var(--danger-strong);
}

.field-error {
    margin: -4px 0 8px;
    color: var(--error-text);
    font-size: 14px;
}

.alert {
    margin-bottom: 18px;
    border-radius: 6px;
    padding: 12px 14px;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success-text);
}

.alert-error {
    background: var(--error-bg);
    color: var(--error-text);
}

.admin-shell {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    min-height: 100vh;
}

.admin-sidebar {
    background: #102a43;
    color: #d9e8f5;
    padding: 22px 18px;
}

.admin-brand {
    display: grid;
    gap: 4px;
    margin-bottom: 24px;
}

.admin-brand a {
    color: #ffffff;
    font-weight: 700;
}

.admin-brand span {
    color: #a9bfd3;
    font-size: 13px;
}

.admin-menu {
    display: grid;
    gap: 6px;
}

.admin-menu a {
    border-radius: 6px;
    color: #d9e8f5;
    padding: 10px 12px;
}

.admin-menu a:hover,
.admin-menu a.is-active {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    text-decoration: none;
}

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

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    min-height: 64px;
    padding: 0 28px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.admin-user {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--muted);
    font-size: 14px;
}

.menu-toggle {
    display: none;
    min-height: 40px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    padding: 8px 12px;
}

.admin-content {
    flex: 1;
    width: min(1180px, calc(100% - 48px));
    margin: 32px auto;
}

.admin-footer {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 28px;
    color: var(--muted);
    border-top: 1px solid var(--border);
    font-size: 13px;
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 24px;
}

.header-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.metric {
    min-height: 120px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}

.metric span {
    display: block;
    color: var(--muted);
    font-weight: 700;
}

.metric strong {
    display: block;
    margin-top: 10px;
    font-size: 36px;
    line-height: 1;
}

.notice {
    display: inline-block;
    margin-bottom: 0;
    background: var(--warning-bg);
    color: var(--warning-text);
    border-radius: 6px;
    padding: 10px 12px;
}

.muted-small {
    color: var(--muted);
    font-size: 13px;
}

.filter-panel {
    margin-bottom: 24px;
}

.filter-form {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.filter-actions {
    display: flex;
    align-items: end;
    gap: 10px;
}

.content-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
}

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}

.section-heading h2 {
    margin-bottom: 0;
}

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

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 720px;
}

th,
td {
    border-bottom: 1px solid var(--border);
    padding: 12px 10px;
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
}

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

.empty {
    color: var(--muted);
    text-align: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    border-radius: 999px;
    background: #e8f1f4;
    color: var(--primary-strong);
    font-size: 12px;
    font-weight: 700;
    padding: 3px 8px;
    white-space: nowrap;
}

.status-active {
    background: #e8f7ef;
    color: #13633b;
}

.status-unsubscribed {
    background: #eef2f6;
    color: #475569;
}

.status-pending {
    background: #fff7df;
    color: #765514;
}

.status-blocked {
    background: #fff0f0;
    color: #a11f2b;
}

.tag-list {
    color: var(--secondary);
    font-size: 14px;
}

.actions-col {
    width: 190px;
}

.table-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.table-actions form {
    margin: 0;
}

.form-panel {
    max-width: 680px;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.form-section-title {
    margin-top: 14px;
    color: var(--secondary);
    font-size: 15px;
    font-weight: 700;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.single-check {
    justify-content: flex-start;
}

.code-textarea {
    min-height: 120px;
    font-family: Consolas, Monaco, monospace;
}

.preview-panel {
    display: flex;
    justify-content: center;
}

.ag-newsletter-form {
    box-sizing: border-box;
    width: min(520px, 100%);
    padding: 20px;
    background: var(--ag-bg);
    color: var(--ag-text);
    font-family: var(--ag-font);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--ag-radius);
}

.ag-newsletter-form * {
    box-sizing: border-box;
}

.ag-newsletter-form form {
    display: grid;
    gap: 10px;
    margin: 0;
}

.ag-newsletter-form input {
    min-height: 44px;
    border-radius: calc(var(--ag-radius) - 2px);
}

.ag-newsletter-form button {
    min-height: 44px;
    border: 0;
    border-radius: calc(var(--ag-radius) - 2px);
    padding: 10px 14px;
    background: var(--ag-button-bg);
    color: var(--ag-button-text);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.ag-form-message {
    margin-top: 10px;
    font-size: 14px;
}

.ag-form-success {
    color: #13633b;
}

.ag-form-error {
    color: #a11f2b;
}

.inline-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 14px;
}

.checkbox-group {
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 8px 0 0;
    padding: 14px;
}

.checkbox-group legend {
    color: var(--text);
    font-weight: 700;
    padding: 0 6px;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.check-option {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 36px;
    font-weight: 400;
}

.check-option input {
    width: 18px;
    min-height: 18px;
}

.code-sample {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #f8fafc;
    color: var(--secondary);
    padding: 14px;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin: 14px 0;
}

.summary-grid div {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
}

.summary-grid span {
    display: block;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.summary-grid strong {
    display: block;
    margin-top: 6px;
    font-size: 26px;
}

.error-list {
    margin-bottom: 0;
    padding-left: 20px;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: 18px;
    color: var(--muted);
}

.pagination > div {
    display: flex;
    gap: 8px;
}

.user-agent {
    max-width: 360px;
    color: var(--muted);
    font-size: 14px;
    word-break: break-word;
}

@media (max-width: 720px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
        gap: 10px;
        padding: 16px;
    }

    .page {
        margin: 28px auto;
    }

    .panel {
        padding: 22px;
    }

    h1 {
        font-size: 26px;
    }

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

    .admin-shell {
        display: block;
    }

    .admin-sidebar {
        display: none;
        padding: 16px;
    }

    body.admin-nav-open .admin-sidebar {
        display: block;
    }

    .admin-header {
        position: sticky;
        top: 0;
        z-index: 10;
        padding: 12px 16px;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .admin-user {
        max-width: calc(100% - 96px);
        justify-content: flex-end;
    }

    .admin-user span {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .admin-content {
        width: min(100% - 28px, 1180px);
        margin: 24px auto;
    }

    .admin-footer,
    .page-header,
    .pagination {
        align-items: flex-start;
        flex-direction: column;
    }

    table {
        min-width: 680px;
    }

    .header-actions,
    .filter-actions {
        justify-content: flex-start;
    }

    .filter-form,
    .inline-form,
    .settings-grid,
    .summary-grid {
        grid-template-columns: 1fr;
    }

    .checkbox-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 460px) {
    .metric-grid {
        grid-template-columns: 1fr;
    }
}