* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: #f2f4f7;
    color: #1a1f29;
}
.wrap {
    max-width: 480px;
    margin: 10vh auto;
    padding: 32px;
}
.card {
    background: #fff;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 2px 10px rgba(0,0,0,.08);
}
h1 { font-size: 1.4rem; margin: 0 0 24px; }
label { display: block; font-size: .85rem; margin-bottom: 6px; color: #444; }
input[type=text], input[type=password] {
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 16px;
    border: 1px solid #d0d5dd;
    border-radius: 8px;
    font-size: 1rem;
}
button, .btn {
    display: inline-block;
    width: 100%;
    padding: 11px 16px;
    background: #2563eb;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
}
button:hover, .btn:hover { background: #1d4ed8; }
.btn-secondary { background: #6b7280; }
.btn-secondary:hover { background: #4b5563; }
.error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: .9rem;
}
.notice {
    background: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: .9rem;
}
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 900px;
    margin: 0 auto 24px;
    padding: 16px 32px 0;
}
.topbar span { color: #555; font-size: .9rem; }
.topbar form { width: auto; }
.topbar button { width: auto; padding: 8px 14px; font-size: .85rem; }
.grid {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 32px 32px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.tile {
    display: block;
    background: #fff;
    border-radius: 12px;
    padding: 24px 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,.06);
    text-decoration: none;
    color: #1a1f29;
    font-weight: 600;
    text-align: center;
}
.tile:hover { box-shadow: 0 4px 16px rgba(0,0,0,.12); }
.tile .icon { font-size: 1.8rem; display: block; margin-bottom: 8px; }
.back { display: inline-block; margin-bottom: 20px; color: #2563eb; text-decoration: none; font-size: .9rem; }