/* STN SMTP Pro 1.1.0: Create Email panel. Works from a phone (16px gutter) up to a desktop. */
:root {
    --stnsmtp-ink: #1f2430;
    --stnsmtp-muted: #5b6474;
    --stnsmtp-line: #d7dce5;
    --stnsmtp-bg: #ffffff;
    --stnsmtp-accent: #1d4ed8;
    --stnsmtp-ok: #166534;
    --stnsmtp-err: #b42318;
    --stnsmtp-warn-bg: #fff7ed;
    --stnsmtp-warn-ink: #7c2d12;
}
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --stnsmtp-ink: #e8ebf1;
        --stnsmtp-muted: #a4adbd;
        --stnsmtp-line: #3a4150;
        --stnsmtp-bg: #171b23;
        --stnsmtp-accent: #7aa2ff;
        --stnsmtp-ok: #86efac;
        --stnsmtp-err: #fca5a5;
        --stnsmtp-warn-bg: #3b2415;
        --stnsmtp-warn-ink: #fed7aa;
    }
}
:root[data-theme="dark"] {
    --stnsmtp-ink: #e8ebf1;
    --stnsmtp-muted: #a4adbd;
    --stnsmtp-line: #3a4150;
    --stnsmtp-bg: #171b23;
    --stnsmtp-accent: #7aa2ff;
    --stnsmtp-ok: #86efac;
    --stnsmtp-err: #fca5a5;
    --stnsmtp-warn-bg: #3b2415;
    --stnsmtp-warn-ink: #fed7aa;
}

[hidden] { display: none !important; }

.stnsmtp-overlay {
    position: fixed; inset: 0; z-index: 100000;
    background: rgba(10, 14, 22, 0.55);
    display: flex; align-items: flex-start; justify-content: center;
    padding: 16px; overflow-y: auto;
    box-sizing: border-box;
}
.stnsmtp-panel {
    background: var(--stnsmtp-bg); color: var(--stnsmtp-ink);
    border: 1px solid var(--stnsmtp-line); border-radius: 12px;
    width: 100%; max-width: 640px; margin: 24px auto;
    padding: 20px; box-sizing: border-box;
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}
.stnsmtp-panel * { box-sizing: border-box; }
.stnsmtp-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.stnsmtp-title { font-size: 1.3rem; margin: 0 0 8px; }
.stnsmtp-panel h3 { font-size: 1.05rem; margin: 18px 0 6px; }
.stnsmtp-panel p { margin: 6px 0; }
.stnsmtp-muted { color: var(--stnsmtp-muted); font-size: 0.95rem; }
.stnsmtp-warn { background: var(--stnsmtp-warn-bg); color: var(--stnsmtp-warn-ink); padding: 10px 12px; border-radius: 8px; }
.stnsmtp-summary { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 8px 0 12px; }
.stnsmtp-summary dt { font-weight: 600; color: var(--stnsmtp-muted); }
.stnsmtp-summary dd { margin: 0; word-break: break-word; }

.stnsmtp-msg { min-height: 1.5em; margin: 10px 0; }
.stnsmtp-msg.is-ok { color: var(--stnsmtp-ok); }
.stnsmtp-msg.is-error { color: var(--stnsmtp-err); }

.stnsmtp-btn {
    display: inline-block; font: inherit; cursor: pointer;
    padding: 9px 14px; margin: 4px 6px 4px 0; min-height: 44px;
    border: 1px solid var(--stnsmtp-line); border-radius: 8px;
    background: transparent; color: var(--stnsmtp-ink);
}
.stnsmtp-btn:disabled { opacity: 0.55; cursor: default; }
.stnsmtp-btn:focus-visible, .stnsmtp-choice input:focus-visible { outline: 3px solid var(--stnsmtp-accent); outline-offset: 2px; }
.stnsmtp-primary { background: var(--stnsmtp-accent); border-color: var(--stnsmtp-accent); color: #fff; }
.stnsmtp-x { font-size: 1.4rem; line-height: 1; min-width: 44px; margin: 0; }
.stnsmtp-link { border: none; text-decoration: underline; padding-left: 0; }
.stnsmtp-small { min-height: 34px; padding: 4px 10px; font-size: 0.9rem; }
.stnsmtp-row { display: flex; flex-wrap: wrap; gap: 4px; }
.stnsmtp-btn.is-highlight { border-color: var(--stnsmtp-accent); box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.3); }

.stnsmtp-choices { border: 1px solid var(--stnsmtp-line); border-radius: 8px; padding: 8px 12px; margin: 10px 0; }
.stnsmtp-choices legend { padding: 0 6px; font-weight: 600; }
.stnsmtp-choice { display: flex; align-items: center; gap: 10px; padding: 8px 0; min-height: 44px; cursor: pointer; }
.stnsmtp-choice input { width: 20px; height: 20px; flex: 0 0 auto; }
.stnsmtp-help { margin: 8px 0; }
.stnsmtp-help summary { cursor: pointer; font-weight: 600; min-height: 32px; }

.stnsmtp-actions .stnsmtp-create { width: 100%; max-width: 100%; }
.stnsmtp-current { font-weight: 600; }

.stnsmtp-attach-list { list-style: none; padding: 0; margin: 6px 0; }
.stnsmtp-attach-item { padding: 8px 0; border-bottom: 1px solid var(--stnsmtp-line); }
.stnsmtp-attach-item input { width: 18px; height: 18px; vertical-align: middle; }

.stnsmtp-check { display: flex; gap: 10px; align-items: flex-start; padding: 6px 0; cursor: pointer; }
.stnsmtp-check input { width: 20px; height: 20px; margin-top: 3px; flex: 0 0 auto; }

@media (max-width: 480px) {
    .stnsmtp-overlay { padding: 0; }
    .stnsmtp-panel { margin: 0; min-height: 100%; border-radius: 0; padding: 16px; }
    .stnsmtp-summary { grid-template-columns: 1fr; }
    .stnsmtp-summary dt { margin-top: 6px; }
    .stnsmtp-btn { width: 100%; margin-right: 0; }
    .stnsmtp-row .stnsmtp-btn { width: auto; flex: 1 1 45%; }
    .stnsmtp-x { width: 44px; }
    .stnsmtp-attach-item .stnsmtp-btn { width: auto; }
}