:root {
    --green:#024227;
    --green-dark:#01351f;
    --green-soft:#edf7f1;
    --text:#343a34;
    --muted:#697069;
    --border:#dce5df;
    --danger:#a62b2b;
    --danger-soft:#fff1f1;
}
* { box-sizing:border-box; }
body {
    margin:0;
    font-family:Arial,Helvetica,sans-serif;
    color:var(--text);
    background:#f5f7f5;
}
.page {
    min-height:100vh;
    display:grid;
    place-items:center;
    padding:32px 18px;
}
.card {
    width:min(760px,100%);
    padding:42px;
    background:#fff;
    border:1px solid var(--border);
    border-top:6px solid var(--green);
    box-shadow:0 18px 55px rgba(2,66,39,.12);
}
.lookup-card { text-align:center; }
.brand {
    text-align:center;
    letter-spacing:.08em;
    font-size:25px;
    color:#4f5848;
}
.brand-line {
    width:290px;
    max-width:72%;
    height:4px;
    margin:10px auto 34px;
    background:var(--green);
}
h1 {
    margin:0 0 10px;
    color:var(--green-dark);
    font-size:clamp(28px,5vw,38px);
}
.intro {
    max-width:580px;
    margin:0 auto;
    color:var(--muted);
    line-height:1.6;
}
.lookup-form {
    display:grid;
    gap:12px;
    max-width:520px;
    margin:28px auto 0;
    text-align:left;
}
label { font-size:14px; font-weight:700; }
input,button {
    width:100%;
    min-height:48px;
    border-radius:4px;
    font:inherit;
}
input {
    border:1px solid #bfc8bf;
    padding:10px 12px;
}
input:focus {
    outline:3px solid rgba(2,66,39,.15);
    border-color:var(--green);
}
button {
    border:0;
    padding:10px 18px;
    color:#fff;
    background:var(--green);
    font-weight:700;
    cursor:pointer;
}
.status {
    display:flex;
    align-items:center;
    gap:18px;
    margin:8px 0 30px;
    padding:20px;
    border-radius:6px;
}
.status h1 { margin-bottom:4px; }
.status p { margin:0; }
.status-icon {
    flex:0 0 58px;
    width:58px;
    height:58px;
    display:grid;
    place-items:center;
    border-radius:50%;
    font-size:34px;
    font-weight:700;
}
.status.valid {
    background:var(--green-soft);
    border:1px solid #bad8c4;
}
.status.valid .status-icon { color:#fff; background:var(--green); }
.status.invalid {
    background:var(--danger-soft);
    border:1px solid #e0b3b3;
}
.status.invalid h1 { color:var(--danger); }
.status.invalid .status-icon { color:#fff; background:var(--danger); }
.details { margin:0; border-top:1px solid var(--border); }
.details > div {
    display:grid;
    grid-template-columns:220px 1fr;
    gap:20px;
    padding:15px 0;
    border-bottom:1px solid var(--border);
}
dt { color:var(--muted); font-weight:700; }
dd { margin:0; font-weight:700; }
.mono { font-family:Consolas,Monaco,monospace; letter-spacing:.04em; }
.secondary-link {
    display:inline-block;
    margin-top:28px;
    color:var(--green);
    font-weight:700;
}
@media (max-width:640px) {
    .card { padding:28px 20px; }
    .details > div { grid-template-columns:1fr; gap:5px; }
    .status { align-items:flex-start; }
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page {
    flex: 1;
    display: grid;
    place-items: center;
    padding: 32px 18px;
}

.site-footer {
    text-align: center;
    padding: 20px 20px 30px;
    background: #fff;
    border-top: 2px solid #024227;
}

.site-footer img {
    max-width: 90%;
    height: auto;
}