:root {
    --bg: #0f172a;
    --card: #ffffff;
    --ink: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --brand: #1d4ed8;
    --brand-ink: #ffffff;
    --danger-bg: #fef2f2;
    --danger-ink: #b91c1c;
    --danger-line: #fecaca;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--ink);
    background: #f1f5f9;
}

/* ---------- Login ---------- */
body.auth {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: radial-gradient(1200px 600px at 50% -10%, #1e293b, var(--bg));
    padding: 24px;
}

.card {
    width: 100%;
    max-width: 380px;
    background: var(--card);
    border-radius: 14px;
    padding: 32px;
    box-shadow: 0 20px 45px rgba(2, 6, 23, .35);
}

.card h1 { margin: 0; font-size: 1.4rem; }
.card .sub { margin: 4px 0 24px; color: var(--muted); font-size: .9rem; }

form label {
    display: block;
    font-size: .82rem;
    font-weight: 600;
    color: var(--muted);
    margin: 14px 0 6px;
}

form input {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid var(--line);
    border-radius: 9px;
    font-size: 1rem;
    background: #fff;
    color: var(--ink);
}
form input:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, .15);
}

button[type=submit] {
    width: 100%;
    margin-top: 22px;
    padding: 12px;
    border: 0;
    border-radius: 9px;
    background: var(--brand);
    color: var(--brand-ink);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}
button[type=submit]:hover { background: #1e40af; }

.alert {
    background: var(--danger-bg);
    color: var(--danger-ink);
    border: 1px solid var(--danger-line);
    padding: 10px 12px;
    border-radius: 9px;
    font-size: .9rem;
    margin-bottom: 8px;
}

/* ---------- App ---------- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.topbar .brand { font-weight: 700; }
.topbar nav { display: flex; align-items: center; gap: 16px; }
.topbar .who { color: var(--muted); font-size: .9rem; }

.btn-ghost {
    text-decoration: none;
    color: var(--brand);
    border: 1px solid var(--line);
    padding: 7px 14px;
    border-radius: 8px;
    font-size: .9rem;
}
.btn-ghost:hover { background: #f8fafc; }

.content { max-width: 900px; margin: 0 auto; padding: 32px 24px; }
.content h1 { margin-top: 0; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-top: 20px;
}
.panel {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 20px;
}
.panel h2 { margin-top: 0; font-size: 1rem; }
.panel.muted { color: var(--muted); }

dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; }
dt { color: var(--muted); font-size: .85rem; }
dd { margin: 0; }