:root {
    --bg: #eef2ec;
    --card: #ffffff;
    --text: #1f2a1f;
    --muted: #5b665b;
    --border: #d5ddd2;
    --accent: #2f6b3a;
    --accent-hover: #255630;
    --ok-bg: #e5f3e7; --ok-text: #1e5b2a;
    --err-bg: #fbe9e7; --err-text: #8a2419;
    --info-bg: #e8f0f8; --info-text: #1f4a74;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #141a15;
        --card: #1d241e;
        --text: #e3eae2;
        --muted: #9aa69a;
        --border: #334034;
        --accent: #4f9b5c;
        --accent-hover: #5fb06d;
        --ok-bg: #1f3a24; --ok-text: #a6dcae;
        --err-bg: #43211d; --err-text: #f2b3aa;
        --info-bg: #1d3044; --info-text: #a9c9ea;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    padding: 32px 16px;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.card {
    width: 100%;
    max-width: 480px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 24px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .06);
}

h1 { margin: 0 0 6px; font-size: 1.6rem; font-weight: 650; }
.lead { margin: 0 0 20px; color: var(--muted); }

.steps {
    list-style: none;
    display: flex;
    gap: 6px;
    padding: 0;
    margin: 0 0 20px;
    counter-reset: step;
    font-size: .82rem;
}
.steps li {
    flex: 1;
    padding-top: 8px;
    border-top: 3px solid var(--border);
    color: var(--muted);
    counter-increment: step;
}
.steps li::before { content: counter(step) ". "; }
.steps li.active { border-color: var(--accent); color: var(--text); font-weight: 600; }
.steps li.done { border-color: var(--accent); }

label { display: block; font-weight: 600; margin: 14px 0 6px; }

input[type=email], input[type=text], input[type=number], input[type=file] {
    width: 100%;
    padding: 10px 12px;
    font: inherit;
    color: var(--text);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
input.code { font-size: 1.6rem; letter-spacing: .5em; text-align: center; }

.hint { margin: 6px 0 0; font-size: .85rem; color: var(--muted); }
.center { text-align: center; margin-top: 16px; }

button {
    display: block;
    width: 100%;
    margin-top: 20px;
    padding: 11px 16px;
    font: inherit;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: 0;
    border-radius: 8px;
    cursor: pointer;
}
button:hover { background: var(--accent-hover); }

form.secondary { margin: 0; }
button.link {
    margin-top: 10px;
    background: none;
    color: var(--accent);
    font-weight: 500;
    text-decoration: underline;
}
button.link:hover { background: none; color: var(--accent-hover); }

.alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 8px; font-size: .92rem; }
.alert-success { background: var(--ok-bg); color: var(--ok-text); }
.alert-error { background: var(--err-bg); color: var(--err-text); }
.alert-info { background: var(--info-bg); color: var(--info-text); }

.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

footer {
    margin-top: 28px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
    font-size: .8rem;
    color: var(--muted);
    text-align: center;
}
footer a { color: var(--accent); }