.message-me-form {
    --surface: #fff;
    --text: #831fa6;
    --muted: #64748b;
    --border: #cbd5e1;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --on-accent: #fff;
    --error: #dc2626;

    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    box-sizing: border-box;
    width: min(32rem, calc(100vw - 2rem));
    padding: 1.75rem;
    border: none;
    border-radius: 1rem;
    background: var(--surface);
    color: var(--text);
    box-shadow: 0 20px 50px rgb(0 0 0 / 0.3);
    font-family: system-ui, sans-serif;
}

/* the popover wrapper: drop UA border/padding/background so the form is the card */
#message-me {
    padding: 0;
    border: none;
    border-radius: 1rem;
    background: transparent;
    overflow: visible;
}

#message-me::backdrop {
    background: rgb(15 23 42 / 0.55);
    backdrop-filter: blur(2px);
}

.message-me-form h2 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
}

.message-me-form p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

/* "Send anonymously" checkbox */
.message-me-form label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    cursor: pointer;
    user-select: none;
}

.message-me-form input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--accent);
    cursor: pointer;
}

/* Message text */
.message-me-form textarea {
    width: 100%;
    min-height: 8rem;
    box-sizing: border-box;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    line-height: 1.5;
    resize: vertical;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.message-me-form textarea::placeholder {
    color: var(--muted);
}

.message-me-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.2);
}

/* only after the user has interacted: not red on first open */
.message-me-form textarea:user-invalid {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgb(220 38 38 / 0.15);
}

/* Buttons row */
.message-me-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.message-me-cancel {
    padding: 0.7rem 1.2rem;
    border: none;
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font: 600 1rem/1.2 system-ui, sans-serif;
    cursor: pointer;
    transition: background-color 0.15s, color 0.15s;
}

.message-me-cancel:hover {
    background: rgb(100 116 139 / 0.12);
    color: var(--text);
}

.message-me-cancel:focus-visible {
    outline: 3px solid rgb(37 99 235 / 0.5);
    outline-offset: 2px;
}

.message-me-send {
    padding: 0.7rem 1.4rem;
    border: none;
    border-radius: 999px;
    background: var(--accent);
    color: var(--on-accent);
    font: 600 1rem/1.2 system-ui, sans-serif;
    cursor: pointer;
    transition: background-color 0.15s, transform 0.15s;
}

.message-me-send:hover {
    background: var(--accent-hover);
}

.message-me-send:active {
    transform: scale(0.98);
}

.message-me-send:focus-visible {
    outline: 3px solid rgb(37 99 235 / 0.5);
    outline-offset: 2px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    .message-me-form {
        --surface: #0f172a;
        --text: #e2e8f0;
        --muted: #94a3b8;
        --border: #334155;
        --accent: #3b82f6;
        --accent-hover: #60a5fa;
        --on-accent: #0b1220;
    }
}

@media (prefers-reduced-motion: reduce) {
    .message-me-form textarea,
    .message-me-cancel,
    .message-me-send { transition: none; }
}

/* Phones: stack buttons full-width */
@media (max-width: 480px) {
    .message-me-form { padding: 1.25rem; }
    .message-me-actions { flex-direction: column-reverse; }
    .message-me-actions button { width: 100%; justify-content: center; }
}