:root {
    color-scheme: light dark;
    --fg: #1d1d1f;
    --muted: #6e6e73;
    --bg: #f5f5f7;
    --card: #fff;
    --border: #d2d2d7;
    --accent: #0a66c2;
    --error: #c62828;
    --success: #2e7d32;
}

@media (prefers-color-scheme: dark) {
    :root {
        --fg: #f5f5f7;
        --muted: #a1a1a6;
        --bg: #111;
        --card: #1c1c1e;
        --border: #3a3a3c;
        --accent: #4c9aff;
        --error: #ff6b6b;
        --success: #66bb6a;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--fg);
    background: var(--bg);
}

main {
    position: relative;
    width: 100%;
    max-width: 32rem;
    padding: 2rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
}

h1 {
    margin: 0 0 0.5rem;
    font-size: 1.75rem;
}

.lang {
    position: absolute;
    top: 1rem;
    right: 1.25rem;
    display: flex;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.lang span {
    font-weight: 600;
}

a {
    color: var(--accent);
}

label {
    display: block;
    margin: 1rem 0 0.25rem;
    font-weight: 500;
}

input,
textarea {
    display: block;
    width: 100%;
    padding: 0.6rem 0.75rem;
    font: inherit;
    color: inherit;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
}

input:focus,
textarea:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

[aria-invalid="true"] {
    border-color: var(--error);
}

textarea {
    resize: vertical;
}

.short {
    width: 5rem;
}

button {
    display: block;
    width: 100%;
    margin-top: 1.5rem;
    padding: 0.65rem 1.5rem;
    font: inherit;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: 0;
    border-radius: 8px;
    cursor: pointer;
}

.error {
    margin: 0.25rem 0 0;
    color: var(--error);
    font-size: 0.875rem;
}

.success {
    color: var(--success);
    font-weight: 500;
}

/* Honeypot: off-screen rather than display:none, which some bots skip. */
.hp {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}