:root {
  color-scheme: light;
  --paper: #f6f1e7;
  --sheet: #fffdf8;
  --ink: #1f1c18;
  --ink-soft: #6b645b;
  --line: #e8dfcd;
  --blue: #2350c4;
  --blue-soft: #eaf0fd;
  --red: #cc3a34;
  --shadow: 0 1px 0 rgba(60, 40, 10, .04), 0 14px 34px -12px rgba(60, 40, 10, .22);
  --r: 16px;
  --f-head: 'Fraunces', Georgia, serif;
  --f-mono: 'IBM Plex Mono', ui-monospace, Menlo, monospace;
  --f-hand: 'Caveat', 'Comic Sans MS', cursive;
  --f-body: 'Inter', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }

body {
  background: radial-gradient(#e3d8c4 1px, transparent 1.2px) 0 0 / 20px 20px, var(--paper);
  color: var(--ink);
  font: 400 16px/1.5 var(--f-body);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  place-items: center;
  min-height: 100dvh;
  padding: 24px 16px calc(24px + env(safe-area-inset-bottom));
  -webkit-tap-highlight-color: transparent;
}

#app { width: 100%; max-width: 440px; }

.sheet {
  position: relative;
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 18px 20px 22px;
  overflow: hidden;
}
.sheet.enter { animation: rise .35s ease both; }

@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.formhead {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font: 500 10.5px/1.2 var(--f-mono);
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
  margin-bottom: 18px;
}

.sec { font: 600 11.5px/1 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--red); }

h1 {
  font: 600 clamp(26px, 7.4vw, 32px)/1.12 var(--f-head);
  letter-spacing: -.01em;
  margin: 10px 0 8px;
  text-wrap: balance;
}

p { margin: 0 0 6px; color: var(--ink-soft); }

.note {
  font: 500 23px/1.15 var(--f-hand);
  color: var(--blue);
  margin: 16px 0 0;
  transform: rotate(-1.2deg);
  transform-origin: left;
}
.note.fade { animation: rise .3s ease both; }

.fine { font: 500 12px/1.45 var(--f-mono); color: var(--ink-soft); margin-top: 14px; }

/* Výběr možností jako políčka formuláře */
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 16px; }
.tile {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 10px 12px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font: 500 15px/1.2 var(--f-body);
  text-align: left;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .1s;
}
.tile:active { transform: scale(.98); }
.tile .box {
  flex: none;
  width: 22px;
  height: 22px;
  border: 1.5px solid #b9ae9c;
  border-radius: 5px;
  display: grid;
  place-items: center;
  font: 700 22px/1 var(--f-hand);
  color: var(--blue);
}
.tiles.one .tile .box { border-radius: 50%; }
.tile .emo { font-size: 20px; line-height: 1; }
.tile[aria-pressed="true"] { border-color: var(--blue); background: var(--blue-soft); }
.tile[aria-pressed="true"] .box { border-color: var(--blue); }
.tile[aria-pressed="true"] .box::after { content: "✓"; }

/* Tlačítka */
.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 14px 22px;
  font: 600 16px/1 var(--f-body);
  cursor: pointer;
  transition: transform .1s, opacity .2s, background .2s;
}
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .32; cursor: not-allowed; }
.btn.primary { background: var(--ink); color: var(--sheet); }
.btn.red { background: var(--red); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn.full { width: 100%; }

.actions { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 24px; }
.back { background: none; border: 0; padding: 8px 0; font: 500 13px var(--f-mono); color: var(--ink-soft); cursor: pointer; text-decoration: none; }
.back:disabled { visibility: hidden; }

/* Ano / Ne */
.nozone { position: relative; height: 140px; margin-top: 18px; }
.nozone .yes { position: absolute; left: 0; top: 14px; }
.nozone .no { position: absolute; right: 0; top: 14px; transition: left .18s ease, top .18s ease, transform .18s; }
.dodge-msg { min-height: 1.45em; font: 500 12.5px/1.45 var(--f-mono); color: var(--red); }

/* Posuvníky */
.bigval { font: 600 clamp(28px, 8vw, 38px)/1.05 var(--f-head); color: var(--blue); margin-top: 16px; }
.bigval small { font-size: .45em; color: var(--ink-soft); }
.range { margin: 18px 0 6px; }
.range input { width: 100%; accent-color: var(--blue); height: 28px; }
.range .labels {
  display: flex;
  justify-content: space-between;
  font: 500 11px var(--f-mono);
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* Pole formuláře */
.fields { display: grid; gap: 14px; margin-top: 18px; }
label.f {
  display: grid;
  gap: 6px;
  font: 600 11.5px var(--f-mono);
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.f input, .f select, .f textarea {
  font: 500 17px/1.3 var(--f-body);
  color: var(--ink);
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  width: 100%;
}
.f textarea { min-height: 110px; resize: vertical; font: 500 23px/1.2 var(--f-hand); color: var(--blue); }
.count { font: 500 11px var(--f-mono); color: var(--ink-soft); text-align: right; margin-top: -8px; }
.f input:focus, .f select:focus, .f textarea:focus, .tile:focus-visible, .btn:focus-visible, .back:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* Kontrola údajů */
.sum { margin: 16px 0 0; padding: 0; list-style: none; border-top: 1px dashed var(--line); }
.sum li {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
}
.k { font: 600 10.5px var(--f-mono); letter-spacing: .07em; text-transform: uppercase; color: var(--ink-soft); }
.sum .v { font: 600 21px/1.15 var(--f-hand); color: var(--blue); overflow-wrap: anywhere; }
.sum .edit { background: none; border: 0; padding: 0; font: 500 12px var(--f-mono); color: var(--ink-soft); text-decoration: underline; cursor: pointer; }

.sign { margin-top: 18px; display: flex; align-items: flex-end; gap: 12px; }
.sign .line {
  flex: 1;
  min-height: 44px;
  border-bottom: 1.5px solid var(--ink);
  padding: 0 4px 2px;
  font: 700 34px/1 var(--f-hand);
  color: var(--blue);
}
.sign .line span { display: inline-block; overflow: hidden; white-space: nowrap; vertical-align: bottom; }
.sign .line span.write { animation: write 1s steps(24) both; }
@keyframes write { from { max-width: 0; } to { max-width: 100%; } }

.err { margin-top: 16px; padding: 12px; border: 1.5px solid var(--red); border-radius: 12px; font-size: 14px; color: var(--ink); }
.err pre { white-space: pre-wrap; font: 500 12.5px/1.45 var(--f-mono); margin: 8px 0 10px; }

/* Obálka */
.env-wrap { text-align: center; }
.envelope {
  position: relative;
  width: min(290px, 100%);
  aspect-ratio: 1.6;
  margin: 18px auto 10px;
  background: #efdcbc;
  border-radius: 10px;
  box-shadow: var(--shadow);
  perspective: 600px;
  cursor: pointer;
}
.envelope .flap {
  position: absolute;
  inset: 0 0 auto 0;
  height: 58%;
  background: #e6cfa7;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: top;
  transition: transform .45s ease, opacity .2s ease .25s;
  z-index: 2;
}
/* Chlopeň se sklopí k divákovi (na 90°), takže nepřeleze přes hlavičku formuláře. */
.envelope.open .flap { transform: rotateX(90deg); opacity: 0; }
.envelope .seal { position: absolute; left: 50%; top: 58%; transform: translate(-50%, -50%); font-size: 34px; z-index: 3; transition: opacity .3s; }
.envelope.open .seal { opacity: 0; }
.envelope .addr { position: absolute; left: 18px; bottom: 12px; text-align: left; font: 600 26px/1.05 var(--f-hand); color: var(--blue); }
.envelope .addr small { display: block; font: 500 10px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: #8a7a5f; }
.envelope .postmark {
  position: absolute;
  right: 14px;
  bottom: 12px;
  width: 50px;
  height: 50px;
  border: 2px dashed #b28b5a;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 22px;
  transform: rotate(6deg);
}

/* Razítko */
.stampzone { position: relative; height: 118px; }
.stamp {
  position: absolute;
  left: 50%;
  top: 50%;
  padding: 8px 16px;
  border: 4px solid var(--red);
  border-radius: 10px;
  color: var(--red);
  font: 600 30px/1 var(--f-mono);
  letter-spacing: .1em;
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, -50%) rotate(-14deg) scale(2.4);
  animation: stamp .45s cubic-bezier(.2, 1.5, .4, 1) .25s forwards;
  mix-blend-mode: multiply;
  pointer-events: none;
}
@keyframes stamp { to { opacity: .88; transform: translate(-50%, -50%) rotate(-14deg) scale(1); } }

canvas.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 50; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .stamp { opacity: .88; transform: translate(-50%, -50%) rotate(-14deg); }
}

/* Pod 420 px by se do dvou sloupců nevešlo delší slovo (Procházka), takže list přetekl displej. */
@media (max-width: 420px) {
  .tiles { grid-template-columns: 1fr; gap: 8px; }
  .tile { min-height: 48px; }
}

@media (max-width: 360px) {
  .sheet { padding: 16px 16px 20px; }
  .sum li { grid-template-columns: 90px minmax(0, 1fr) auto; }
}