:root {
    --ink: #1f2937;
    --muted: #5f6b7a;
    --line: #d8dee8;
    --brand: #166534;
    --brand-dark: #14532d;
    --error: #991b1b;
    --ok: #166534;
}

* {
    box-sizing: border-box;
}

body {
    align-items: center;
    background: #eef2f5;
    color: var(--ink);
    display: flex;
    font: 16px Arial, Helvetica, sans-serif;
    justify-content: center;
    margin: 0;
    min-height: 100vh;
    padding: 20px;
}

main {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 18px 45px rgba(31, 41, 55, .12);
    max-width: 430px;
    padding: 30px;
    width: 100%;
}

.brand {
    border-bottom: 4px solid var(--brand);
    margin-bottom: 24px;
    padding-bottom: 18px;
}

.eyebrow {
    color: var(--brand);
    font-size: 12px;
    font-weight: 700;
    margin: 0 0 7px;
    text-transform: uppercase;
}

h1 {
    font-size: 28px;
    margin: 0;
}

.subtitle {
    color: var(--muted);
    line-height: 1.5;
    margin: 9px 0 0;
}

form,
label {
    display: grid;
    gap: 8px;
}

form {
    gap: 17px;
}

label {
    color: #374151;
    font-weight: 700;
}

input {
    border: 1px solid #b8c2cf;
    border-radius: 7px;
    font-size: 16px;
    padding: 12px;
    width: 100%;
}

input:focus {
    border-color: var(--brand);
    outline: 3px solid rgba(22, 101, 52, .14);
}

button {
    background: var(--brand);
    border: 0;
    border-radius: 7px;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    min-height: 46px;
    padding: 12px 16px;
}

button:hover {
    background: var(--brand-dark);
}

.alert {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 7px;
    color: var(--error);
    line-height: 1.45;
    margin-bottom: 18px;
    padding: 12px;
}

.alert.ok {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: var(--ok);
}