:root {
    color-scheme: light dark;
    --bg: #f4f5f7;
    --card-bg: #ffffff;
    --text: #1b1f24;
    --muted: #5b6270;
    --accent: #2f6fed;
    --accent-hover: #2558c4;
    --border: #d7dbe2;
    --error: #c0392b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    padding: 1.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

h1 {
    margin-top: 0;
    font-size: 1.4rem;
}

.muted {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.4;
}

.muted.small {
    font-size: 0.85rem;
}

.error {
    color: var(--error);
    font-size: 0.9rem;
}

label {
    display: block;
    margin: 1rem 0 0.35rem;
    font-weight: 600;
    font-size: 0.9rem;
}

textarea, select, input[type="text"] {
    width: 100%;
    padding: 0.6rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--card-bg);
    color: var(--text);
    resize: vertical;
}

button {
    margin-top: 1.5rem;
    width: 100%;
    padding: 0.7rem;
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}

button:hover { background: var(--accent-hover); }

.link-box {
    margin-top: 1rem;
}

.link-back {
    display: inline-block;
    margin-top: 1.5rem;
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
}

.link-back:hover { text-decoration: underline; }

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14161a;
        --card-bg: #1e2126;
        --text: #e7e9ec;
        --muted: #9aa2ad;
        --border: #333842;
        --accent: #5b8cff;
        --accent-hover: #7ba0ff;
        --error: #ff6b5e;
    }
}