:root {
  --ink: #1b2430;
  --muted: #5a6573;
  --paper: #faf8f4;
  --card: #ffffff;
  --line: #e4dfd5;
  --accent: #1f6f5c;
  --accent-ink: #ffffff;
  --warn: #b4531a;
  --warn-bg: #fdf1e6;
  --soft: #eef5f2;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #eceae4;
    --muted: #a3acb8;
    --paper: #12161c;
    --card: #1a2028;
    --line: #2b333d;
    --accent: #4fb89d;
    --accent-ink: #0c1512;
    --warn: #f0a46b;
    --warn-bg: #2a2018;
    --soft: #16241f;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { width: min(880px, 100% - 32px); margin-inline: auto; }
a { color: var(--accent); }

.top { border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--paper); z-index: 5; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; }
.brand { font-weight: 600; font-size: 1.25rem; text-decoration: none; color: var(--ink); letter-spacing: -0.01em; }
.brand b { color: var(--accent); }
nav { display: flex; gap: 14px; align-items: center; font-size: 0.95rem; flex-wrap: wrap; justify-content: flex-end; }
nav a { text-decoration: none; color: var(--muted); }
nav a:hover { color: var(--ink); }
.pill { background: var(--accent); color: var(--accent-ink) !important; padding: 6px 12px; border-radius: 999px; }
@media (max-width: 560px) { nav a:not(.pill) { display: none; } }

.hero { padding: 56px 0 24px; }
.eyebrow { text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; color: var(--accent); margin: 0 0 8px; font-weight: 600; }
h1 { font-size: clamp(2.1rem, 6vw, 3.2rem); line-height: 1.08; margin: 0 0 16px; letter-spacing: -0.02em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 62ch; margin: 0 0 28px; }
.stat { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat > div { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.stat strong { display: block; font-size: 1.7rem; letter-spacing: -0.02em; }
.stat span { color: var(--muted); font-size: .92rem; }
@media (max-width: 640px) { .stat { grid-template-columns: 1fr; } }
.source { color: var(--muted); font-size: .85rem; margin: 12px 0 0; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 26px; margin-top: 22px; }
.card.accent { background: var(--soft); border-color: var(--accent); }
h2 { font-size: 1.4rem; margin: 0 0 8px; letter-spacing: -0.01em; display: flex; align-items: center; gap: 10px; }
h3 { margin: 22px 0 4px; }
.n { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: .95rem; }
.hint { color: var(--muted); font-size: .94rem; margin: 6px 0 14px; }

label { display: block; font-size: .92rem; color: var(--muted); margin-bottom: 14px; }
input, textarea, button { font: inherit; }
input[type=text], input[type=email], input[type=number], input[type=date], input:not([type]), textarea {
  display: block; width: 100%; margin-top: 5px; padding: 10px 12px; background: var(--paper); color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px;
}
input:focus, textarea:focus, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .9rem; }
.check input { margin-top: 4px; }

button { background: var(--accent); color: var(--accent-ink); border: 0; padding: 11px 18px; border-radius: 10px; font-weight: 600; cursor: pointer; }
button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 6px 0 14px; }

.out { margin-top: 16px; padding: 16px; border-radius: 12px; background: var(--soft); border: 1px solid var(--line); }
.out.warn { background: var(--warn-bg); border-color: var(--warn); }
.out .big { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; }
.out ul { margin: 8px 0 0; padding-left: 20px; }
.out small, .out .muted { color: var(--muted); }

.arg { border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; margin-bottom: 10px; background: var(--paper); }
.arg > label { display: flex; gap: 10px; align-items: center; margin: 0; color: var(--ink); font-size: 1rem; cursor: pointer; }
.arg textarea { margin-top: 10px; }

.letter { font: 15px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; }
.price { font-size: 1.2rem; }
.wait { margin-top: 12px; max-width: 460px; }

.know { padding: 28px 0 40px; }
.know ul { padding-left: 20px; }
.know li { margin-bottom: 8px; }
details { border-top: 1px solid var(--line); padding: 10px 0; }
details > summary { cursor: pointer; font-weight: 600; }
details > p { color: var(--muted); margin: 8px 0 0; }
footer { border-top: 1px solid var(--line); padding: 22px 0 40px; color: var(--muted); font-size: .88rem; }

@media print {
  body * { visibility: hidden; }
  #letterOut, #letterOut * { visibility: visible; }
  #letterOut { position: absolute; left: 0; top: 0; width: 100%; border: 0; background: #fff; color: #000; }
}

.drop { display: block; border: 2px dashed var(--line); border-radius: 14px; padding: 22px; text-align: center; cursor: pointer; color: var(--muted); }
.drop:hover { border-color: var(--accent); color: var(--ink); }
.drop input { display: block; margin: 8px auto 0; }
#noticePreview { max-width: 100%; max-height: 360px; margin-top: 14px; border-radius: 10px; border: 1px solid var(--line); }
.readfield { display: grid; grid-template-columns: 1fr auto; gap: 8px; margin: 4px 0; font-size: .95rem; }
.ok { color: var(--accent); font-weight: 600; }
#c_status, #l_status { margin: 10px 0 0; font-weight: 600; }
#c_status.err, #l_status.err { color: var(--warn); }