:root {
  --bg: #fff7f0;
  --ink: #5b4636;
  --muted: #a98d76;
  --accent: #f4a07a;
  --accent-deep: #ec835d;
  --card: #fffdfa;
  --line: #f6e3d5;
  --stage: #4f9d82;
  --shadow: 0 16px 40px rgba(224, 146, 100, 0.16);
  --shadow-soft: 0 8px 22px rgba(224, 146, 100, 0.12);
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 6%, #ffe7d4 0, transparent 34%),
    radial-gradient(circle at 90% 2%, #ffe0e7 0, transparent 30%),
    radial-gradient(circle at 50% 100%, #e4f4ec 0, transparent 38%),
    var(--bg);
  background-attachment: fixed;
}

.bg-paws {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: radial-gradient(circle at 20% 30%, #b07a55 2px, transparent 3px),
    radial-gradient(circle at 22% 34%, #b07a55 6px, transparent 7px);
  background-size: 180px 180px;
}

.page {
  flex: 1;
  width: min(680px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0 36px;
}

.lang-switch {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 30;
}

.lang-switch select {
  width: auto;
  min-width: 132px;
  margin: 0;
  padding: 9px 38px 9px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  background-color: var(--card);
  box-shadow: var(--shadow-soft);
}

.lang-switch select:focus {
  box-shadow: 0 0 0 3px #fbdccb;
}

.hero {
  text-align: center;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.1rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: 0.02em;
}

footer p,
.hint,
.note,
.result-kicker {
  color: var(--muted);
  line-height: 1.7;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 32px;
  box-shadow: var(--shadow);
  padding: 32px;
  margin-top: 28px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

@media (hover: hover) {
  .card:hover {
    transform: translateY(-2px);
    box-shadow: 0 22px 48px rgba(224, 146, 100, 0.2);
  }
}

.cat-mark {
  width: 96px;
  margin: 0 auto 10px;
  color: var(--accent);
}

.cat-mark svg {
  display: block;
  animation: bob 3s ease-in-out infinite;
}

.cat-eyes {
  transform-box: fill-box;
  transform-origin: center;
  animation: blink 4.5s ease-in-out infinite;
}

@keyframes bob {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

@keyframes blink {
  0%,
  91%,
  100% {
    transform: scaleY(1);
  }
  94% {
    transform: scaleY(0.08);
  }
  97% {
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .cat-mark svg,
  .cat-eyes {
    animation: none;
  }
}

.calculator h2 {
  margin: 0 0 20px;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
}

.fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-weight: 600;
  color: var(--muted);
}

input,
select {
  width: 100%;
  border: 2px solid var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
  background: #fff8f2;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%23a98d76' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
}

input:focus,
select:focus {
  outline: none;
  background: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px #fbdccb;
}

button {
  width: 100%;
  margin-top: 18px;
  border: 0;
  border-radius: 999px;
  padding: 15px 20px;
  background: linear-gradient(180deg, #ffb089, var(--accent-deep));
  box-shadow: 0 10px 22px rgba(236, 131, 93, 0.32);
  color: white;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

@media (hover: hover) {
  button:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(236, 131, 93, 0.4);
    filter: brightness(1.03);
  }
}

button:active {
  transform: translateY(1px);
  box-shadow: var(--shadow-soft);
}

.hint {
  min-height: 1.4em;
  margin: 10px 0 0;
  color: #e0654f;
}

.result {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 2px dashed var(--line);
  text-align: center;
}

.result-kicker {
  margin: 0 0 4px;
  font-size: 0.95rem;
}

.human-age {
  margin: 6px 0 12px;
  font-size: 1.35rem;
}

.human-age strong {
  font-size: 2.6rem;
  color: var(--accent-deep);
}

.stage {
  display: inline-block;
  margin: 0;
  padding: 8px 18px;
  border-radius: 999px;
  background: #e4f4ec;
  color: var(--stage);
  font-weight: 700;
}

.note {
  margin: 14px 0 0;
}

footer {
  margin-top: 32px;
  font-size: 0.9rem;
  text-align: center;
}

.copyright {
  margin: 0;
  padding: 10px 16px 12px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
}

@media (max-width: 520px) {
  .page {
    padding: 88px 0 28px;
  }

  .lang-switch select {
    min-width: 0;
    padding: 8px 34px 8px 14px;
    font-size: 16px;
  }

  .card {
    padding: 24px;
    border-radius: 26px;
  }
}