:root {
    --bg: #0f172a;
    --card: #111827;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --accent: #38bdf8;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --line: #1f2937;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Inter, Segoe UI, Arial, sans-serif;
    background: radial-gradient(circle at top, #1e293b 0%, var(--bg) 45%);
    color: var(--text);
}

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

.container {
    width: min(1200px, 92%);
    margin: 0 auto;
}

.topbar {
    border-bottom: 1px solid var(--line);
    background: rgba(15, 23, 42, 0.8);
    position: sticky;
    top: 0;
    backdrop-filter: blur(6px);
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 64px;
}

.topbar nav {
    display: flex;
    gap: 16px;
}

.page {
    padding: 20px 0 60px;
    display: grid;
    gap: 16px;
}

.card {
    background: linear-gradient(160deg, rgba(17, 24, 39, 0.95), rgba(2, 6, 23, 0.95));
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px;
}

.card.narrow {
    width: min(430px, 100%);
    margin: 48px auto 0;
}

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

.window-switch {
    display: flex;
    gap: 8px;
}

.window-switch a {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
}

.window-switch a.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent) inset;
}

.kpis {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.kpi p {
    font-size: 1.5rem;
    margin: 8px 0 0;
}

.product-card {
    display: grid;
    gap: 12px;
}

.product-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
}

.inline-kpis {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    color: var(--muted);
}

.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

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

.form {
    display: grid;
    gap: 10px;
}

.form.grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

label {
    display: grid;
    gap: 6px;
}

input, button {
    border-radius: 10px;
    border: 1px solid var(--line);
    background: #0b1220;
    color: var(--text);
    padding: 10px 12px;
}

button {
    cursor: pointer;
    background: linear-gradient(90deg, #0284c7, #0ea5e9);
    border: none;
    font-weight: 600;
}

button.danger {
    background: linear-gradient(90deg, #b91c1c, #ef4444);
}

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

.alert {
    border-radius: 12px;
    padding: 10px 12px;
    border: 1px solid transparent;
}

.alert.error {
    border-color: rgba(239, 68, 68, 0.6);
    background: rgba(127, 29, 29, 0.35);
}

.alert.success {
    border-color: rgba(16, 185, 129, 0.6);
    background: rgba(6, 78, 59, 0.35);
}

.alert.warning {
    border-color: rgba(245, 158, 11, 0.6);
    background: rgba(120, 53, 15, 0.35);
}

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