:root {
    --bg: #f4f6f9;
    --card: #ffffff;
    --ink: #1f2933;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --border: #e5e7eb;
    --ok: #047857;
    --error: #b91c1c;
    --danger: #dc2626;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.5;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #0f172a;
    color: #fff;
    padding: 0.75rem 1.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.brand { color: #fff; font-weight: 700; text-decoration: none; font-size: 1.1rem; }
.nav-links { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.nav-links a { color: #cbd5e1; text-decoration: none; }
.nav-links a:hover { color: #fff; }
.nav-links a.logout { color: #fca5a5; }

.container { max-width: 980px; margin: 1.5rem auto; padding: 0 1rem; }

h1 { margin-top: 0; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.card.narrow { max-width: 420px; margin: 3rem auto; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }
.tile { text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
.tile:hover { border-color: var(--primary); transform: translateY(-2px); }
.tile h2 { margin-top: 0; color: var(--primary); }

label { display: block; margin: 0.75rem 0; font-weight: 600; font-size: 0.92rem; }
.hint { font-weight: 400; color: var(--muted); }
input, select, textarea {
    width: 100%;
    padding: 0.55rem 0.65rem;
    margin-top: 0.3rem;
    border: 1px solid var(--border);
    border-radius: 7px;
    font: inherit;
    font-weight: 400;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.85rem; }

.row { display: flex; gap: 1rem; flex-wrap: wrap; }
.row > label { flex: 1; min-width: 160px; }

.inline { display: flex; gap: 0.6rem; align-items: flex-end; }
.inline input { margin-top: 0; }

button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.6rem 1.1rem;
    border-radius: 7px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    margin-top: 0.5rem;
}
button:hover { background: var(--primary-dark); }
button.danger { background: var(--danger); padding: 0.4rem 0.7rem; font-size: 0.85rem; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--border); }

label.check { display: flex; align-items: center; gap: 0.5rem; font-weight: 400; }
label.check input[type="checkbox"], label.check input[type="radio"] { width: auto; margin: 0; }
.radio-row { display: flex; align-items: center; gap: 1rem; margin: 0.4rem 0; flex-wrap: wrap; }
.radio-row > span { flex: 1; min-width: 200px; font-weight: 600; font-size: 0.92rem; }

.muted { color: var(--muted); }
.ok { color: var(--ok); font-weight: 600; }
.error { color: var(--error); font-weight: 600; }
.qr { display: block; margin: 1rem 0; width: 200px; height: 200px; }
code { background: #eef2f7; padding: 0.1rem 0.35rem; border-radius: 4px; }