:root {
  --blue: #264A98; --blue-2: #1d3a7a; --orange: #ED5A24; --link: #0070C0;
  --bg: #f3f5f9; --card: #ffffff; --ink: #1d2433; --muted: #5d6677; --line: #dfe3ea; --field: #ffffff;
  --tab: #eef1f7; --focus: #ED5A24; --ok: #1f7a43; --bad: #b3261e;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11151d; --card: #1a202b; --ink: #e8ebf1; --muted: #a5adbb; --line: #2c3442; --field: #141922; --tab: #232b38; color-scheme: dark; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 14px max(16px, calc((100vw - 1180px) / 2)); background: var(--blue); color: #fff; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { border-radius: 8px; background: #fff; }
.brand h1 { margin: 0; font-size: 1.2rem; line-height: 1.2; }
.brand p { margin: 0; font-size: .85rem; opacity: .85; }
.who { font-size: .9rem; }
.who .linkbtn { color: #fff; }
.who .btn.primary { background: #fff; color: var(--blue); border-color: #fff; }
.who .btn.primary:hover { background: #e8eefb; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 20px 16px 48px; }
.lead { margin: 0 0 18px; color: var(--muted); max-width: 70ch; }
.grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 18px; align-items: start; }
@media (max-width: 900px) { .grid { grid-template-columns: minmax(0, 1fr); } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; min-width: 0; }
.card + .card, .grid + .card { margin-top: 18px; }
.grid .card + .card { margin-top: 0; }
h2 { display: flex; align-items: center; gap: 10px; margin: 0 0 14px; font-size: 1.1rem; }
.num { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--orange); color: #fff; font-size: .85rem; flex: none; }
form label { display: block; font-size: .85rem; font-weight: 600; margin: 0 0 10px; color: var(--ink); }
input, select { display: block; width: 100%; margin-top: 4px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px;
  background: var(--field); color: var(--ink); font: inherit; font-weight: 400; min-height: 44px; }
input:focus-visible, select:focus-visible, button:focus-visible, .panel:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
input[aria-invalid="true"] { border-color: var(--bad); box-shadow: 0 0 0 1px var(--bad); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 480px) { .two { grid-template-columns: 1fr; } }
.opt { font-weight: 400; color: var(--muted); }
fieldset { border: 0; padding: 0; margin: 4px 0 6px; display: flex; flex-wrap: wrap; gap: 6px 16px; }
legend { font-size: .85rem; font-weight: 600; margin-bottom: 6px; padding: 0; }
label.check { display: inline-flex; align-items: center; gap: 8px; font-weight: 400; font-size: .95rem; margin: 0; min-height: 32px; }
label.check input { width: 18px; height: 18px; min-height: 0; margin: 0; accent-color: var(--blue); }
.hint { font-size: .82rem; color: var(--muted); margin: -2px 0 12px; }
.linkbtn { background: none; border: 0; padding: 0; font: inherit; color: var(--link); text-decoration: underline; cursor: pointer; }
@media (prefers-color-scheme: dark) { .linkbtn { color: #7fb6ff; } }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 16px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line); background: var(--tab); color: var(--ink); font: inherit; font-weight: 600; font-size: .95rem; }
.btn:hover { border-color: var(--blue); }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn.primary:hover { background: var(--blue-2); }
.btn.small { min-height: 36px; padding: 6px 12px; font-size: .85rem; }
.btn[aria-pressed="true"] { background: #2a2f3a; color: #fff; border-color: #2a2f3a; }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.variant { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.variant button { border: 0; background: var(--tab); color: var(--ink); padding: 8px 14px; font: inherit; font-size: .9rem; cursor: pointer; min-height: 38px; }
.variant button + button { border-left: 1px solid var(--line); }
.variant button[aria-pressed="true"] { background: var(--blue); color: #fff; }
.mail { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; }
.mail-head { display: flex; gap: 6px; padding: 9px 12px; background: #e9edf3; border-bottom: 1px solid #dfe3ea; }
.mail-head span { width: 10px; height: 10px; border-radius: 50%; background: #c5ccd8; }
.mail-body { padding: 18px; overflow-x: auto; background: #fff; color: #222; }
.fake { margin: 0 0 14px; font: 14px/1.45 Arial, Helvetica, sans-serif; color: #222; }
.preview { min-height: 120px; }
.preview.plain { white-space: pre-wrap; font: 13px/1.5 ui-monospace, Menlo, Consolas, monospace; color: #222; }
.preview.dark { filter: invert(1) hue-rotate(180deg); background: #fff; }
.preview.dark img { filter: invert(1) hue-rotate(180deg); }
.mail-body:has(.preview.dark) { background: #1f1f1f; }
.mail-body:has(.preview.dark) .fake { color: #e6e6e6; }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.tabs button { border: 1px solid var(--line); background: var(--tab); color: var(--ink); border-radius: 999px; padding: 8px 14px; font: inherit; font-size: .92rem; cursor: pointer; min-height: 40px; }
.tabs button[aria-selected="true"] { background: var(--blue); border-color: var(--blue); color: #fff; }
.panel { border-top: 1px solid var(--line); padding-top: 6px; }
.rec { margin: 8px 0 4px; font-size: .9rem; color: var(--muted); }
.group { padding: 12px 0 6px; }
.group + .group { border-top: 1px dashed var(--line); }
.group h3 { margin: 4px 0 10px; font-size: 1rem; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.steps-wrap { display: flex; gap: 20px; align-items: flex-start; }
.steps { margin: 0; padding-left: 1.4em; flex: 1; }
.steps li { margin: 0 0 6px; padding-left: 4px; }
.qr { margin: 0; text-align: center; font-size: .8rem; color: var(--muted); flex: none; }
.qr img { display: block; background: #fff; border-radius: 8px; border: 1px solid var(--line); }
@media (max-width: 640px) { .qr { display: none; } }
kbd { font: 600 .8em ui-monospace, Menlo, Consolas, monospace; background: var(--tab); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; padding: 1px 5px; }
code { font: .9em ui-monospace, Menlo, Consolas, monospace; background: var(--tab); padding: 1px 5px; border-radius: 5px; word-break: break-all; }
.tips ul { margin: 0; padding-left: 1.2em; color: var(--muted); }
.tips li { margin-bottom: 6px; }
.toast { position: fixed; left: 50%; bottom: 20px; transform: translate(-50%, 30px); opacity: 0; pointer-events: none; transition: .25s;
  background: var(--ok); color: #fff; padding: 12px 18px; border-radius: 10px; font-weight: 600; max-width: calc(100vw - 32px); box-shadow: 0 6px 24px rgba(0,0,0,.2); }
.toast.bad { background: var(--bad); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.copybox { position: fixed; left: 0; top: 0; opacity: 0; pointer-events: none; }
body:not(.ready) main { visibility: hidden; }
@media (prefers-reduced-motion: reduce) { .toast { transition: none; } }