:root {
    --bg: #0f1117;
    --card: #171a22;
    --border: #2a3140;
    --text: #eef2ff;
    --muted: #9aa4b2;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --error: #ef4444;
    --success: #22c55e;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top, #1a1f2e 0%, var(--bg) 45%);
    color: var(--text);
    min-height: 100vh;
}

code {
    background: #0b0d12;
    padding: 2px 6px;
    border-radius: 6px;
    font-size: 0.9em;
}

.topbar {
    border-bottom: 1px solid var(--border);
    background: rgba(15, 17, 23, 0.85);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar-inner, .page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 20px;
}

.brand {
    display: flex;
    gap: 12px;
    align-items: center;
}

.brand.compact strong { display: block; }
.brand.compact span { color: var(--muted); font-size: 0.85rem; }

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    display: grid;
    place-items: center;
    font-weight: 700;
}

.auth-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card, .card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.auth-card { width: min(360px, 100%); }

.auth-title {
    margin: 0 0 20px;
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
}

.topbar-title {
    font-size: 1.05rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px;
}

.stat-card span {
    display: block;
    color: var(--muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.stat-card strong {
    font-size: 1.8rem;
}

.layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 16px;
    margin-bottom: 16px;
}

.send-layout {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 16px;
    margin-bottom: 16px;
}

@media (max-width: 900px) {
    .layout, .send-layout { grid-template-columns: 1fr; }
}

.send-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.send-hint {
    margin: 0;
    font-size: 0.85rem;
}

.devices-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.devices-head h2 {
    margin: 0;
}

.select-all {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 0.88rem;
    cursor: pointer;
    user-select: none;
}

.col-check {
    width: 36px;
}

.device-check, .select-all input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

.send-selected {
    border-color: rgba(99, 102, 241, 0.55);
}

.form {
    display: grid;
    gap: 14px;
}

label {
    display: grid;
    gap: 6px;
    font-size: 0.92rem;
    color: var(--muted);
}

input, textarea {
    width: 100%;
    border: 1px solid var(--border);
    background: #0b0d12;
    color: var(--text);
    border-radius: 10px;
    padding: 10px 12px;
    font: inherit;
}

textarea { resize: vertical; }

.btn {
    border: none;
    border-radius: 10px;
    padding: 10px 14px;
    font: inherit;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.alert {
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 14px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #fecaca;
}

.alert-success {
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.35);
    color: #bbf7d0;
}

.muted { color: var(--muted); }

.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

th, td {
    text-align: left;
    padding: 10px 8px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
}

.badge.ok { background: rgba(34, 197, 94, 0.15); color: #86efac; }
.badge.fail { background: rgba(239, 68, 68, 0.15); color: #fca5a5; }

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar-sub {
    color: var(--muted);
    font-size: 0.82rem;
    margin-top: 2px;
}

.status-row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.stat-card small {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-size: 0.78rem;
}

.stat-card.accent {
    border-color: rgba(99, 102, 241, 0.45);
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.08), var(--card));
}

.chart-card { margin-bottom: 16px; }

.chart-bars {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    min-height: 160px;
    padding-top: 8px;
}

.chart-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.chart-bar-wrap {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: flex-end;
    background: #0b0d12;
    border-radius: 8px;
    border: 1px solid var(--border);
    padding: 6px;
}

.chart-bar {
    width: 100%;
    min-height: 4px;
    border-radius: 6px;
    background: linear-gradient(180deg, #8b5cf6, var(--primary));
}

.chart-label { font-size: 0.75rem; color: var(--muted); }
.chart-value { font-size: 0.85rem; font-weight: 600; }

.card h2 {
    margin: 0 0 14px;
    font-size: 1.05rem;
}