:root {
  color-scheme: light dark;
  --bg: #fbe8ec;
  --check: rgba(229, 72, 106, 0.07);
  --paper: #fffaf8;
  --paper-2: #fdf0f2;
  --ink: #3b1028;
  --ink-soft: #7c5266;
  --primary: #8e1b3f;
  --primary-ink: #fff6f7;
  --rose: #e5486a;
  --line: #efcfd7;
  --focus: #e5486a;
  --shadow: 0 1px 0 rgba(142, 27, 63, 0.06), 0 18px 40px -18px rgba(142, 27, 63, 0.35);
  --danger: #b3261e;
  --no-bg: #ffffff;
  --no-ink: #8e1b3f;
  --ease-pop: cubic-bezier(0.3, 1.5, 0.5, 1);
  --display: 'Caprasimo', 'Cooper Black', Georgia, serif;
  --body: ui-rounded, 'SF Pro Rounded', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --r-card: 28px;
  --r-item: 18px;
  --r-pill: 999px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d0d18;
    --check: rgba(240, 125, 152, 0.035);
    --paper: #2b1523;
    --paper-2: #351b2b;
    --ink: #fbe7ec;
    --ink-soft: #c9a3b4;
    --primary: #f07d98;
    --primary-ink: #2a0d1b;
    --rose: #f07d98;
    --line: #4a2a3c;
    --focus: #f3c77a;
    --shadow: 0 1px 0 rgba(255, 255, 255, 0.03), 0 24px 50px -20px rgba(0, 0, 0, 0.7);
    --danger: #ffb4ab;
    --no-bg: #3d2033;
    --no-ink: #fbe7ec;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font: 17px/1.5 var(--body);
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    repeating-linear-gradient(0deg, var(--check) 0 22px, transparent 22px 44px),
    repeating-linear-gradient(90deg, var(--check) 0 22px, transparent 22px 44px);
  overflow-x: hidden;
}

@media (prefers-color-scheme: dark) {
  body {
    background-image:
      radial-gradient(ellipse 70% 45% at 50% 0%, rgba(243, 199, 122, 0.12), transparent 70%),
      repeating-linear-gradient(0deg, var(--check) 0 22px, transparent 22px 44px),
      repeating-linear-gradient(90deg, var(--check) 0 22px, transparent 22px 44px);
  }
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 400;
  line-height: 1.12;
  margin: 0;
  letter-spacing: 0.005em;
  text-wrap: balance;
}

p { margin: 0; }

a { color: var(--primary); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* screen shell */
.shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 60px 16px 24px;
}

.card {
  width: 100%;
  max-width: 460px;
  background: var(--paper);
  border-radius: var(--r-card);
  box-shadow: var(--shadow);
  padding: 28px 22px 22px;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  inset: 7px;
  border: 1.5px dashed var(--line);
  border-radius: calc(var(--r-card) - 7px);
  pointer-events: none;
}

.card > * { position: relative; }

.screen-head { display: grid; gap: 6px; margin-bottom: 20px; }
.screen-head h1 { font-size: clamp(30px, 8vw, 38px); }
.screen-head p { color: var(--ink-soft); }

.screen-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}
.screen-foot > :only-child { margin-left: auto; }

.enter { animation: enter 0.38s cubic-bezier(0.2, 0.8, 0.2, 1) both; }
@keyframes enter {
  from { opacity: 0; transform: translateY(14px) scale(0.985); }
  to { opacity: 1; transform: none; }
}

.stack { display: grid; gap: 16px; }

/* buttons */
.btn {
  appearance: none;
  border: 0;
  border-radius: var(--r-pill);
  font: inherit;
  font-weight: 650;
  min-height: 48px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s, background-color 0.15s, box-shadow 0.15s, opacity 0.15s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.btn:active:not([disabled]) { transform: scale(0.96); }
.btn .icon { margin: 0 -2px; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }

.btn-primary {
  background: var(--primary);
  color: var(--primary-ink);
  box-shadow: 0 6px 16px -8px var(--primary);
}
.btn-primary:hover:not([disabled]) { filter: brightness(1.08); }

.btn-soft {
  background: var(--paper-2);
  color: var(--ink);
  box-shadow: inset 0 0 0 1.5px var(--line);
}
.btn-soft:hover:not([disabled]) { box-shadow: inset 0 0 0 1.5px var(--rose); }

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  padding: 0 12px;
}
.btn-ghost:hover { color: var(--ink); }

.btn-block { width: 100%; }

/* icons, notes */
.icon { flex: none; display: inline-block; vertical-align: middle; }

.note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 15px;
  line-height: 1.4;
  background: color-mix(in srgb, var(--primary) 9%, transparent);
}
.note[hidden] { display: none; }
.note .icon { color: var(--primary); margin-top: 1px; }
.note.is-error { background: color-mix(in srgb, var(--danger) 12%, transparent); }
.note.is-error .icon { color: var(--danger); }

.icon-row { display: grid; grid-template-columns: 36px 1fr; gap: 12px; align-items: center; }
.icon-row > div { display: grid; gap: 1px; min-width: 0; }
.icon-tile {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--primary);
  background: var(--paper);
  box-shadow: inset 0 0 0 1.5px var(--line);
}

/* language toggle */
.topbar { position: absolute; top: 12px; right: 12px; z-index: 30; }
.lang-toggle {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  box-shadow: inset 0 0 0 1.5px var(--line), 0 6px 16px -10px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(6px);
}
.lang-opt {
  appearance: none;
  border: 0;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  min-width: 40px;
  min-height: 30px;
  padding: 0 10px;
  border-radius: var(--r-pill);
  color: var(--ink-soft);
  background: transparent;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}
.lang-opt:hover { color: var(--ink); }
.lang-opt[aria-pressed='true'] { background: var(--primary); color: var(--primary-ink); }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font: inherit;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  min-height: 44px;
  min-width: 76px;
  padding: 0 14px;
  border-radius: 14px;
  border: 0;
  background: var(--paper-2);
  color: var(--ink);
  box-shadow: inset 0 0 0 1.5px var(--line);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, box-shadow 0.15s, transform 0.15s;
  touch-action: manipulation;
}
.chip-check { display: none; margin-left: -2px; }
.chip[aria-pressed='true'] .chip-check { display: inline-block; animation: pop 0.28s var(--ease-pop); }
.chip:active:not([disabled]) { transform: scale(0.95); }
.chip:hover:not([disabled]) { box-shadow: inset 0 0 0 1.5px var(--rose); }
.chip[aria-pressed='true'] { background: var(--primary); color: var(--primary-ink); box-shadow: none; }
.chip[disabled] { opacity: 0.4; cursor: not-allowed; text-decoration: line-through; }

/* fields */
.field { display: grid; gap: 6px; min-width: 0; }
.field-label { font-weight: 650; font-size: 15px; display: flex; align-items: center; gap: 6px; }
.field-label .icon { color: var(--primary); }
.field-hint { font-size: 14px; color: var(--ink-soft); }
.field-error { font-size: 14px; color: var(--danger); font-weight: 600; }
.field-error:empty { display: none; }

.input {
  font: inherit;
  width: 100%;
  min-width: 0;
  min-height: 48px;
  padding: 10px 14px;
  border-radius: 14px;
  border: 0;
  color: var(--ink);
  background: var(--paper-2);
  box-shadow: inset 0 0 0 1.5px var(--line);
  transition: box-shadow 0.15s;
}
.input:focus { outline: none; box-shadow: inset 0 0 0 2px var(--rose); }
.input:focus-visible { outline: none; }
.input[aria-invalid='true'] { box-shadow: inset 0 0 0 2px var(--danger); }
.input::placeholder { color: var(--ink-soft); opacity: 0.7; }
textarea.input { resize: vertical; min-height: 76px; line-height: 1.4; }
select.input { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%), linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
input[type='date'].input { display: block; cursor: pointer; }
input[type='date'].input::-webkit-date-and-time-value { text-align: left; }
input[type='date'].input::-webkit-calendar-picker-indicator { opacity: 0.85; cursor: pointer; }

/* seal */
.seal { display: block; width: 84px; height: 84px; margin: 0 auto; color: var(--primary); }
.seal .seal-mark { fill: var(--primary-ink); }

/* question card */
.screen-question { padding: 40px 24px 36px; }
.question { display: grid; justify-items: center; text-align: center; gap: 14px; }
.question .seal { width: 96px; height: 96px; margin-bottom: 6px; transform: rotate(-8deg); }
.question-text { font-family: var(--display); font-weight: 400; margin: 0; font-size: clamp(34px, 9.5vw, 46px); line-height: 1.08; max-width: 13ch; }
.question-from { color: var(--ink-soft); font-style: italic; }
.question-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  min-height: 112px;
  margin-top: 10px;
}
.btn-yes, .btn-no { min-width: 112px; min-height: 54px; font-size: 19px; }
.btn-yes { transition: transform 0.3s cubic-bezier(0.3, 1.6, 0.5, 1), filter 0.15s; }
.btn-no {
  white-space: nowrap;
  background: var(--no-bg);
  color: var(--no-ink);
  box-shadow: inset 0 0 0 2px var(--primary), 0 8px 18px -10px rgba(59, 16, 40, 0.55);
}
.btn-no:hover:not([disabled]) { box-shadow: inset 0 0 0 2px var(--primary), 0 8px 18px -10px rgba(59, 16, 40, 0.55); }
.btn-no.is-running { box-shadow: inset 0 0 0 2px var(--primary), 0 12px 24px -10px rgba(59, 16, 40, 0.6); will-change: transform; }
.btn-no.is-dashing { filter: url(#runaway-blur); }
.btn-no:focus-visible { outline: none; }
.runaway-ghost { transform-origin: 50% 50%; }

@keyframes pop {
  from { transform: scale(0.4); opacity: 0; }
  to { transform: none; opacity: 1; }
}

/* toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 50;
  transform: translateX(-50%);
  max-width: calc(100vw - 32px);
  padding: 12px 20px;
  border-radius: var(--r-pill);
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  box-shadow: var(--shadow);
  animation: toast 2.6s ease both;
}
@keyframes toast {
  0% { opacity: 0; transform: translate(-50%, 10px); }
  10%, 85% { opacity: 1; transform: translate(-50%, 0); }
  100% { opacity: 0; transform: translate(-50%, 0); }
}

/* floating hearts */
.hearts { position: fixed; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.hearts span {
  position: absolute;
  bottom: -40px;
  left: var(--x);
  font-size: var(--s);
  color: var(--rose);
  opacity: 0;
  animation: float var(--d) linear var(--delay) infinite;
}
@keyframes float {
  0% { transform: translate(0, 0) rotate(-8deg); opacity: 0; }
  12% { opacity: 0.32; }
  50% { transform: translate(18px, -55vh) rotate(8deg); }
  85% { opacity: 0.2; }
  100% { transform: translate(-10px, -110vh) rotate(-6deg); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .hearts { display: none; }
  .enter, .toast { animation-duration: 0.01s; }
  .chip-check, .place-check { animation: none !important; }
  .btn:active:not([disabled]), .chip:active:not([disabled]) { transform: none; }
  *, *::before, *::after { transition-duration: 0.01s !important; }
}

.site-footer { position: relative; z-index: 0; display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px; padding: 8px 16px 24px; font-size: 13px; color: var(--ink-soft); text-align: center; }
.site-footer a { color: inherit; font-weight: 600; }
.limit-note { display: flex; gap: 6px; align-items: flex-start; }
.limit-note .icon { flex: none; margin-top: 2px; }