* { box-sizing: border-box; }
html, body { height: 100%; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: #f3f4f6;
    color: #1f2937;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.pin-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .08);
    padding: 2rem 2.25rem 2.25rem;
    width: 100%;
    max-width: 380px;
    text-align: center;
}

.pin-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 160px;
    max-height: 72px;
    margin: 0 auto 1.25rem;
    overflow: hidden;
}

.pin-logo svg,
.pin-logo img {
    display: block;
    max-width: 100%;
    max-height: 72px;
    width: auto;
    height: auto;
}

.pin-card h1 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0 0 .75rem;
    color: #111827;
}

.pin-card .pin-intro {
    font-size: .9rem;
    color: #4b5563;
    line-height: 1.45;
    margin: 0 0 1.5rem;
    text-align: left;
}

.pin-markdown p { margin: 0 0 .75rem; }
.pin-markdown p:last-child { margin-bottom: 0; }
.pin-markdown a { color: #1e4a7a; text-decoration: underline; }
.pin-markdown ul, .pin-markdown ol { margin: 0 0 .75rem; padding-left: 1.25rem; }
.pin-markdown code { background: #f3f4f6; padding: 0 .25rem; border-radius: 3px; }

.pin-label {
    display: block;
    text-align: left;
    font-size: .8rem;
    color: #4b5563;
    margin: 0 0 .5rem;
}

.pin-digits {
    display: flex;
    gap: .5rem;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.pin-digit {
    width: 100%;
    aspect-ratio: 1 / 1;
    min-width: 0;
    text-align: center;
    font-size: 1.4rem;
    font-weight: 500;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    background: #fff;
    color: #111827;
    padding: 0;
}

.pin-digit:focus {
    outline: none;
    border-color: #1e4a7a;
    box-shadow: 0 0 0 3px rgba(30, 74, 122, .15);
}

.pin-submit {
    width: 100%;
    padding: .75rem 1rem;
    background: var(--pin-btn-bg, #1e4a7a);
    color: var(--pin-btn-text, #fff);
    font-size: 1rem;
    font-weight: 500;
    border: 0;
    border-radius: 6px;
    cursor: pointer;
}

.pin-submit:hover {
    background: var(--pin-btn-bg-hover, #163a61);
    color: var(--pin-btn-text-hover, #fff);
}

.pin-submit:disabled {
    background: #94a3b8;
    cursor: not-allowed;
}

.pin-error {
    color: #b00020;
    font-size: .85rem;
    margin: 0 0 1rem;
}

.pin-trusted {
    background: #e7f3ec;
    color: #185a32;
    border: 1px solid #b6dec5;
    border-radius: 6px;
    font-size: .85rem;
    padding: .5rem .75rem;
    margin: 0 0 1rem;
    text-align: left;
}