:root {
  --bg: #f6f1e7;
  --card: #fffdf8;
  --ink: #1d1b22;
  --muted: #6d6875;
  --line: #e7dfd0;
  --accent: #ff6b4a;
  --accent-ink: #fff;
  --soft: #fff0ea;
  --paper: #fdfcf8;
  --shadow: 0 1px 2px rgb(40 30 20 / .06), 0 8px 24px rgb(40 30 20 / .07);
  --r: 18px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16151a; --card: #201f26; --ink: #f2efe9; --muted: #a29dab;
    --line: #34323c; --soft: #3a2621; --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 8px 24px rgb(0 0 0 / .25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #16151a; --card: #201f26; --ink: #f2efe9; --muted: #a29dab;
  --line: #34323c; --soft: #3a2621; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 Inter, system-ui, -apple-system, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
a { color: inherit; }
button, input, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* header */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; max-width: 1180px; margin: 0 auto; padding: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; text-decoration: none; letter-spacing: -.02em; }
.logo { width: 36px; height: 36px; stroke: none; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; border: 1.5px solid var(--line); background: var(--card);
  padding: 9px 16px; border-radius: 999px; font-weight: 600; cursor: pointer; box-shadow: var(--shadow); white-space: nowrap;
}
.pill .dot { width: 9px; height: 9px; border-radius: 50%; background: #c9c2b6; }
.pill.on .dot { background: #2fbf71; box-shadow: 0 0 0 4px rgb(47 191 113 / .2); }
.pill.busy .dot { background: #f5b400; animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .3; } }

.notice { max-width: 1148px; margin: 0 auto 8px; margin-inline: max(16px, calc((100% - 1148px) / 2)); background: var(--soft); border: 1.5px solid var(--accent); padding: 12px 16px; border-radius: 14px; }

.hero { max-width: 1180px; margin: 0 auto; padding: 12px 16px 24px; }
.hero h1 { font-size: clamp(28px, 5vw, 48px); line-height: 1.08; letter-spacing: -.035em; margin: 0 0 12px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { color: var(--muted); max-width: 620px; margin: 0; font-size: 17px; }

/* layout */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 400px; gap: 24px; max-width: 1180px; margin: 0 auto; padding: 0 16px; align-items: start; }
.editor { display: grid; gap: 20px; min-width: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; box-shadow: var(--shadow); display: grid; gap: 14px; }
.card h2 { margin: 0; font-size: 18px; letter-spacing: -.01em; display: flex; align-items: center; gap: 10px; }
.step { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--ink); color: var(--card); font-size: 14px; }

/* tabs */
.tabs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.tabs button {
  display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 12px 6px; border-radius: 14px;
  border: 1.5px solid var(--line); background: transparent; cursor: pointer; font-weight: 600; font-size: 14px;
}
.tabs svg { width: 24px; height: 24px; }
.tabs [aria-selected="true"] { border-color: var(--accent); background: var(--soft); color: var(--accent); }
.panel { display: grid; gap: 12px; }

input[type="text"], textarea {
  width: 100%; border: 1.5px solid var(--line); background: var(--bg); border-radius: 12px; padding: 11px 13px; resize: vertical;
}
input[type="text"]:focus, textarea:focus { border-color: var(--accent); outline: none; }
input[type="range"] { width: 100%; accent-color: var(--accent); }

.drop {
  display: grid; place-items: center; min-height: 180px; border: 2px dashed var(--line); border-radius: 16px;
  cursor: pointer; text-align: center; padding: 16px; transition: .15s; background: var(--bg); overflow: hidden;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--soft); }
.drop span { display: grid; justify-items: center; gap: 4px; color: var(--muted); }
.drop span b { color: var(--ink); }
.drop svg { width: 32px; height: 32px; color: var(--accent); }
.drop img { max-height: 220px; max-width: 100%; border-radius: 10px; }

.row { display: flex; gap: 10px; align-items: center; min-width: 0; }
.row > input { min-width: 0; }
.row.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 160px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 4px; font-size: 14px; font-weight: 600; }
.field small, .toggle small { color: var(--muted); font-weight: 400; }
.label { margin: 0; font-size: 14px; font-weight: 600; }
.hint { margin: -6px 0 0; font-size: 13px; color: var(--muted); min-height: 1.2em; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 12px; padding: 10px 16px;
  font-weight: 600; cursor: pointer; border: 1.5px solid var(--line); background: var(--card);
}
.btn.ghost:hover { border-color: var(--ink); }
.btn.small { padding: 6px 12px; font-size: 14px; }
.btn.icon { padding: 0; width: 52px; }
.btn.primary {
  position: relative; overflow: hidden; flex: 1; background: var(--accent); color: var(--accent-ink); border: 0;
  font-size: 17px; padding: 14px 20px; box-shadow: 0 6px 18px rgb(255 107 74 / .35);
}
.btn.primary:hover { filter: brightness(1.05); }
.btn.primary:disabled { opacity: .6; cursor: progress; }
.btn.primary > * { position: relative; z-index: 1; }
#progress { position: absolute; inset: 0 auto 0 0; width: 0; background: rgb(0 0 0 / .15); z-index: 0; transition: width .2s; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips button {
  border: 1.5px solid var(--line); background: transparent; border-radius: 999px; padding: 7px 14px; cursor: pointer; font-weight: 500; font-size: 14px;
}
.chips [aria-pressed="true"] { background: var(--ink); color: var(--card); border-color: var(--ink); }
.chips button:hover { border-color: var(--ink); }

.seg { display: inline-flex; border: 1.5px solid var(--line); border-radius: 12px; padding: 3px; gap: 3px; background: var(--bg); }
.seg.wide { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; }
.seg button { border: 0; background: transparent; padding: 8px 12px; border-radius: 9px; cursor: pointer; font-weight: 600; font-size: 14px; }
.seg [aria-pressed="true"] { background: var(--card); box-shadow: var(--shadow); color: var(--accent); }

.toggle { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 15px; }
.toggle input { width: 18px; height: 18px; accent-color: var(--accent); }
.advanced summary { cursor: pointer; font-weight: 600; font-size: 14px; color: var(--muted); }
.advanced[open] { display: grid; gap: 12px; }

/* output */
.output { position: sticky; top: 16px; display: grid; gap: 12px; }
.paper-wrap {
  background: linear-gradient(var(--ink), var(--ink)) top / 100% 22px no-repeat; border-radius: 14px 14px 0 0;
  padding: 10px 20px 24px; max-height: calc(100vh - 210px); overflow: auto; overscroll-behavior: contain;
}
.paper { position: relative; background: var(--paper); padding: 16px 0 20px; box-shadow: 0 6px 16px rgb(0 0 0 / .12); }
.paper::after { /* torn edge */
  content: ""; position: absolute; left: 0; right: 0; bottom: -10px; height: 10px;
  background: linear-gradient(135deg, var(--paper) 50%, #0000 50%) 0 0 / 12px 10px repeat-x,
              linear-gradient(-135deg, var(--paper) 50%, #0000 50%) 0 0 / 12px 10px repeat-x;
}
#preview { display: block; width: 100%; height: auto; image-rendering: pixelated; }
.meta { margin: 0; text-align: center; font-size: 13px; color: var(--muted); }
.printbar { display: flex; gap: 10px; align-items: stretch; }
.copies { display: flex; align-items: center; border: 1.5px solid var(--line); border-radius: 12px; background: var(--card); }
.copies button { border: 0; background: transparent; width: 36px; height: 100%; font-size: 20px; cursor: pointer; }
.copies output { min-width: 22px; text-align: center; font-weight: 700; }
.status { margin: 0; min-height: 1.5em; text-align: center; font-size: 14px; color: var(--muted); }
.status.err { color: #d93a2b; }

/* info sections */
.how, .faq { max-width: 1180px; margin: 56px auto 0; padding: 0 16px; }
.how h2, .faq h2 { font-size: 24px; letter-spacing: -.02em; }
.how ol { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: s; }
.how li { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; display: grid; gap: 4px; counter-increment: s; }
.how li::before { content: counter(s); font-weight: 800; font-size: 28px; color: var(--accent); }
.how li span { color: var(--muted); }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { color: var(--muted); margin: 8px 0 0; }
footer { text-align: center; color: var(--muted); font-size: 14px; padding: 48px 16px 120px; }

/* mobile */
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .output { position: static; }
  .paper-wrap { max-height: 60vh; }
  .printbar {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 10; padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(12px); border-top: 1px solid var(--line);
  }
  .how ol { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .tabs button { font-size: 12px; padding: 10px 2px; }
  .grid2 { grid-template-columns: 1fr; }
  .pill { padding: 8px 12px; font-size: 14px; }
  .seg button { padding: 8px 6px; font-size: 13px; }
}