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

:root {
  --bg: #fff7ec;
  --ink: #24170f;
  --muted: #6d5543;
  --card: #ffffff;
  --shadow: 0 12px 30px rgba(36, 23, 15, 0.1);
  --radius: 24px;
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 12%, #ffe2b8 0%, transparent 38%),
    radial-gradient(circle at 92% 6%, #d9e4ff 0%, transparent 36%),
    radial-gradient(circle at 78% 92%, #dff7d0 0%, transparent 42%),
    radial-gradient(circle at 20% 85%, #ffe8f1 0%, transparent 35%),
    var(--bg);
  display: flex;
  flex-direction: column;
  line-height: 1.45;
}

.site-header {
  padding: 2.2rem 1.25rem 0.25rem;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.95rem;
  text-align: left;
}

.logo {
  width: 3.4rem;
  height: 3.4rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.9rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(145deg, #ff9f43, #ff5d7a);
  box-shadow: 0 8px 18px rgba(255, 93, 122, 0.35);
  flex-shrink: 0;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 2.45rem);
  letter-spacing: -0.03em;
}

.tagline {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: clamp(0.95rem, 2.8vw, 1.1rem);
}

.hero-lead {
  max-width: 36rem;
  margin: 1.1rem auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.6vw, 1.12rem);
}

main {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 1rem 1.25rem 2.75rem;
  flex: 1;
}

.toolbar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.35rem;
}

.intro {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
}

.filter {
  border: 2px solid rgba(36, 23, 15, 0.12);
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.42rem 0.9rem;
  font: inherit;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
}

.filter.is-on {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
}

@media (min-width: 640px) {
  .cards { grid-template-columns: 1fr 1fr; gap: 1.25rem; }
}

@media (min-width: 960px) {
  .cards { grid-template-columns: 1fr 1fr 1fr; }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  padding: 1.35rem 1.25rem 1.2rem;
  border-radius: var(--radius);
  background: var(--card);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  border: 3px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  min-height: 230px;
}

.card[hidden] { display: none !important; }

.card:hover,
.card:focus-visible {
  transform: translateY(-5px);
  box-shadow: 0 18px 36px rgba(36, 23, 15, 0.14);
  outline: none;
}

.badge {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.7);
  color: var(--muted);
}

.emoji {
  font-size: 2.45rem;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.card h2 {
  margin: 0;
  font-size: clamp(1.28rem, 3vw, 1.5rem);
}

.card .en {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card .blurb {
  margin: 0.45rem 0 0;
  color: var(--ink);
  opacity: 0.82;
  font-size: 0.95rem;
}

.cta {
  margin-top: auto;
  padding-top: 0.95rem;
  font-weight: 800;
}

.card-dino { background: linear-gradient(160deg, #e7f6e2, #fff 58%); border-color: #7cbc6a; }
.card-moon { background: linear-gradient(160deg, #e9ecff, #fff 58%); border-color: #7a86e8; }
.card-body { background: linear-gradient(160deg, #ffe4ea, #fff 58%); border-color: #ef6d8a; }
.card-weather { background: linear-gradient(160deg, #e3f4ff, #fff 58%); border-color: #4aa3e0; }
.card-ocean { background: linear-gradient(160deg, #d9f3f5, #fff 58%); border-color: #2bb3b8; }
.card-insects { background: linear-gradient(160deg, #fff0cc, #fff 58%); border-color: #e2a526; }
.card-volcano { background: linear-gradient(160deg, #ffe0d2, #fff 58%); border-color: #e06a3a; }
.card-solar { background: linear-gradient(160deg, #efe6ff, #fff 58%); border-color: #9b6fe0; }
.card-plants { background: linear-gradient(160deg, #e5f8d8, #fff 58%); border-color: #62b84a; }
.card-daynight { background: linear-gradient(160deg, #dfe8ff, #fff4d8 50%, #fff 80%); border-color: #5b6fd6; }
.card-sleep { background: linear-gradient(160deg, #e8e0ff, #fff 58%); border-color: #8a79d6; }
.card-vehicles { background: linear-gradient(160deg, #e4f0ff, #fff 58%); border-color: #4d8fe0; }

.card-dino .cta { color: #2f6b28; }
.card-moon .cta { color: #3b46b0; }
.card-body .cta { color: #c23b5c; }
.card-weather .cta { color: #1f6fa8; }
.card-ocean .cta { color: #187f84; }
.card-insects .cta { color: #9a6d00; }
.card-volcano .cta { color: #b4451f; }
.card-solar .cta { color: #6a3fad; }
.card-plants .cta { color: #2f7a28; }
.card-daynight .cta { color: #3a4db0; }
.card-sleep .cta { color: #5b49a8; }
.card-vehicles .cta { color: #2a6cb0; }

.site-footer {
  text-align: center;
  padding: 1rem 1.25rem 1.9rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p { margin: 0; }