* {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    margin: 0;
    background: #0f172a;
    color: #e2e8f0;
}

.container {
    max-width: 700px;
    margin: 40px auto;
    padding: 20px;
}

h1 {
    margin-bottom: 6px;
}

.subtitle {
    margin-top: 0;
    color: #94a3b8;
}

.card {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 12px;
    padding: 16px;
    display: grid;
    gap: 12px;
}

label {
    display: grid;
    gap: 6px;
    font-size: 14px;
}

input[type="text"],
input[type="password"] {
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #475569;
    background: #0b1220;
    color: #e2e8f0;
}

.checks {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.inline {
    display: flex;
    align-items: center;
    gap: 8px;
}

button {
    border: 0;
    border-radius: 8px;
    padding: 11px 14px;
    font-weight: bold;
    background: #2563eb;
    color: #fff;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

.alert {
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 12px;
}

.alert.error {
    border: 1px solid #dc2626;
    background: #450a0a;
}

.alert.success {
    border: 1px solid #16a34a;
    background: #052e16;
}