:root {
    --page-bg: #f5f7fb;
    --surface: #ffffff;
    --surface-secondary: #f8fafc;
    --text-primary: #111827;
    --text-secondary: #64748b;
    --border: #e5e7eb;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --violet: #7c3aed;
    --shadow: 0 10px 28px rgba(15, 23, 42, .08);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text-primary);
    background: var(--page-bg);
    letter-spacing: 0;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: 40px; line-height: 1.1; }
h2 { font-size: 22px; }
h3 { font-size: 16px; }
p { color: var(--text-secondary); line-height: 1.6; }
.icon { width: 18px; height: 18px; stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; flex: 0 0 auto; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text-primary); font-weight: 800; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; color: white; background: var(--primary); border-radius: 8px; }
.site-header { height: 70px; display: flex; align-items: center; justify-content: space-between; padding: 0 28px; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.site-nav { display: flex; align-items: center; gap: 20px; }
.guest-shell { min-height: 100vh; display: flex; flex-direction: column; }
.guest-main { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 32px 0 56px; flex: 1; }
.site-footer { display: flex; flex-wrap: wrap; gap: 18px; margin-top: auto; padding: 28px; color: var(--text-secondary); border-top: 1px solid var(--border); background: var(--surface); }
.hero { min-height: min(680px, calc(100vh - 180px)); display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .8fr); gap: 32px; align-items: center; }
.hero h1 { font-size: 64px; margin-bottom: 16px; }
.hero-copy p:not(.eyebrow) { font-size: 18px; max-width: 640px; }
.hero-actions, .action-row, .form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.hero-panel, .panel, .card, .auth-card, .page-block, .instance-head {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
}
.hero-panel { padding: 22px; }
.mini-status, .status-list div, .list-row { display: flex; align-items: center; gap: 10px; }
.mini-status { justify-content: space-between; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.hero-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 18px; }
.hero-grid div, .stat-card { padding: 16px; background: var(--surface-secondary); border: 1px solid var(--border); border-radius: 8px; }
.hero-grid span, .stat-card span, .muted-text, .field-help, small { color: var(--text-secondary); }
.hero-grid b, .stat-card b { display: block; font-size: 24px; margin-top: 8px; }
.eyebrow { color: var(--primary); font-weight: 700; text-transform: uppercase; font-size: 12px; letter-spacing: 0; }
.button, button {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 8px 14px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}
.button-primary { color: white; background: var(--primary); }
.button-primary:hover { color: white; background: var(--primary-hover); }
.button-muted { color: var(--text-primary); background: var(--surface-secondary); border-color: var(--border); }
.button-muted.danger-action { color: var(--danger); background: #fff7f7; border-color: #fecaca; }
.link-button { color: var(--primary); background: transparent; padding: 0; min-height: auto; }
.icon-button { width: 40px; height: 40px; padding: 0; color: var(--text-primary); background: var(--surface-secondary); border-color: var(--border); }
.section-grid, .pricing-strip, .stat-grid { display: grid; gap: 16px; }
.section-grid { grid-template-columns: repeat(3, 1fr); margin-top: 20px; }
.section-grid article { padding: 20px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
.pricing-strip { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 20px; }
.price-card { padding: 20px; }
.price-card strong { display: block; font-size: 24px; margin: 12px 0; }
.page-block, .auth-card { max-width: 720px; margin: 42px auto; padding: 28px; }
.auth-card { max-width: 440px; }
.form-stack, .settings-grid { display: grid; gap: 16px; }
label { display: grid; gap: 7px; font-weight: 700; }
input, select, textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text-primary);
    background: white;
    font: inherit;
}
textarea { resize: vertical; }
.telegram-editor {
    display: grid;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: white;
}
.telegram-editor textarea {
    border: 0;
    border-top: 1px solid var(--border);
    border-radius: 0;
}
.format-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px;
    background: var(--surface-secondary);
}
.format-button {
    width: 34px;
    min-height: 32px;
    padding: 0;
    color: var(--text-primary);
    background: white;
    border-color: var(--border);
    font-weight: 800;
}
.format-button:hover { border-color: var(--primary); color: var(--primary); }
.check-row { display: flex; align-items: flex-start; gap: 10px; font-weight: 500; color: var(--text-secondary); }
.check-row input { width: auto; margin-top: 4px; }
.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; border: 1px solid var(--border); }
.alert-success { color: #166534; background: #ecfdf5; border-color: #bbf7d0; }
.alert-danger { color: #991b1b; background: #fef2f2; border-color: #fecaca; }
.notice { padding: 12px; border-radius: 8px; color: #92400e; background: #fffbeb; border: 1px solid #fde68a; }
.empty-state {
    display: grid;
    justify-items: start;
    gap: 10px;
    padding: 18px;
    margin-bottom: 16px;
    border: 1px dashed #cbd5e1;
    border-radius: 8px;
    background: var(--surface-secondary);
}
.empty-state.compact { margin-top: 14px; }
.empty-state h3 { margin: 0; }
.empty-state p { margin: 0; }
.muted-details { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--border); }

.app-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 18px; padding: 18px; background: var(--surface); border-right: 1px solid var(--border); }
.sidebar-brand { margin-bottom: 8px; }
.sidebar-nav { display: grid; gap: 6px; }
.sidebar-nav a { display: flex; align-items: center; gap: 10px; padding: 10px 12px; color: var(--text-secondary); border-radius: 8px; }
.sidebar-nav a.active, .sidebar-nav a:hover { color: var(--text-primary); background: var(--surface-secondary); }
.nav-label { color: var(--text-secondary); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.sidebar-profile { margin-top: auto; display: grid; gap: 8px; padding-top: 14px; border-top: 1px solid var(--border); }
.app-main { min-width: 0; }
.topbar { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 0 24px; background: rgba(255,255,255,.86); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 4; }
.topbar h1 { font-size: 22px; margin: 0; }
.content { padding: 24px; min-height: calc(100vh - 70px); }
.stat-grid { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); margin-bottom: 18px; }
.stat-card.danger-soft { background: #fff7ed; border-color: #fed7aa; }
.two-column { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); gap: 18px; }
.admin-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.panel { padding: 20px; }
.panel.narrow { max-width: 760px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; white-space: nowrap; }
th { color: var(--text-secondary); font-size: 13px; }
.error-cell { max-width: 420px; white-space: normal; overflow-wrap: anywhere; color: var(--danger); }
.badge { display: inline-flex; align-items: center; min-height: 26px; padding: 4px 9px; border-radius: 999px; color: var(--text-primary); background: var(--surface-secondary); border: 1px solid var(--border); font-size: 13px; }
.status-dot { width: 10px; height: 10px; border-radius: 999px; display: inline-block; background: var(--text-secondary); }
.status-dot.success { background: var(--success); }
.status-dot.warning { background: var(--warning); }
.status-dot.danger { background: var(--danger); }
.status-dot.muted { background: #94a3b8; }
.list { display: grid; gap: 10px; }
.list-row { justify-content: space-between; padding: 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-secondary); }
.list-row div { display: grid; gap: 4px; }
.list-row span { color: var(--text-secondary); }
.details { display: grid; grid-template-columns: 180px 1fr; gap: 10px 16px; }
.details dt { color: var(--text-secondary); }
.details dd { margin: 0; overflow-wrap: anywhere; }
.instance-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 18px; padding: 20px; margin-bottom: 16px; }
.inline-meta { display: flex; flex-wrap: wrap; gap: 14px; color: var(--text-secondary); }
.inline-meta span { display: inline-flex; align-items: center; gap: 6px; }
.tabs { display: flex; gap: 6px; overflow-x: auto; margin-bottom: 16px; }
.tabs a { padding: 10px 12px; color: var(--text-secondary); border: 1px solid var(--border); border-radius: 8px; background: var(--surface); white-space: nowrap; }
.tabs a.active { color: white; background: var(--primary); border-color: var(--primary); }
.settings-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-section { display: grid; gap: 14px; align-content: start; }
.full-span { grid-column: 1 / -1; }
.form-actions { grid-column: 1 / -1; justify-content: flex-end; border-top: 1px solid var(--border); padding-top: 16px; }
.dirty-note { display: none; color: var(--warning); margin-right: auto; font-weight: 700; }
.dirty-note.visible { display: inline; }
.inline-form { display: flex; gap: 8px; align-items: center; }
.inline-actions { display: flex; align-items: center; gap: 6px; }
.short-input { width: 80px; }
.status-list { display: grid; gap: 12px; margin-top: 18px; }
.status-list div { justify-content: space-between; padding: 12px; background: var(--surface-secondary); border: 1px solid var(--border); border-radius: 8px; }
.install-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.install-summary div { display: grid; gap: 6px; padding: 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-secondary); }
.install-summary b, .install-summary span { overflow-wrap: anywhere; }
.install-summary span { color: var(--text-secondary); font-size: 14px; }
.step-list { display: grid; gap: 10px; margin-bottom: 14px; }
.step-list div {
    display: grid;
    grid-template-columns: 34px 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-secondary);
}
.step-list span:first-child {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 999px;
    background: white;
    font-weight: 800;
}
.step-list .done span:first-child { color: white; background: var(--success); border-color: var(--success); }
.step-list small { text-align: right; }
.checklist { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.checklist span {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 10px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-secondary);
}
.price-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-secondary);
}
.price-line div { display: grid; gap: 4px; }
.price-line span { color: var(--text-secondary); }
.price-line strong { font-size: 24px; white-space: nowrap; }
.mobile-only { display: none; }

@media (max-width: 880px) {
    h1, .hero h1 { font-size: 40px; }
    .hero, .two-column, .admin-grid, .settings-grid, .install-summary, .checklist { grid-template-columns: 1fr; }
    .section-grid { grid-template-columns: 1fr; }
    .app-shell { grid-template-columns: 1fr; }
    .sidebar, .site-nav {
        position: fixed;
        inset: 70px 0 auto 0;
        height: auto;
        transform: translateY(-120%);
        transition: transform .2s ease;
        z-index: 10;
        box-shadow: var(--shadow);
    }
    .sidebar.open, .site-nav.open { transform: translateY(0); }
    .site-nav { display: grid; padding: 16px 28px; background: var(--surface); border-bottom: 1px solid var(--border); }
    .topbar { padding: 0 16px; }
    .content { padding: 16px; }
    .mobile-only { display: inline-flex; }
    .sidebar-profile { margin-top: 12px; }
    .instance-head { display: grid; }
    .details { grid-template-columns: 1fr; }
    .inline-form { flex-wrap: wrap; }
    .price-line { align-items: flex-start; flex-direction: column; }
    .step-list div { grid-template-columns: 34px 1fr; }
    .step-list small { grid-column: 2; text-align: left; }
}