:root {
  --pink1: #ff6b9d;
  --pink2: #c44569;
  --pink3: #ffb8d0;
  --pink4: #fff0f5;
  --grad: linear-gradient(135deg, #ff6b9d 0%, #c44569 50%, #ff8a80 100%);
  --grad-light: linear-gradient(135deg, #fff0f5 0%, #ffe0eb 100%);
  --shadow: 0 8px 32px rgba(196,69,105,0.18);
  --radius: 16px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font);
  background: var(--grad-light);
  color: #333;
  min-height: 100vh;
  overflow-x: hidden;
}

/* NAV */
nav {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 16px rgba(196,69,105,0.1);
}
.nav-brand { font-size: 1.4rem; font-weight: 800; background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; text-decoration: none; }
.nav-links { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.nav-links a { text-decoration: none; color: var(--pink2); font-size: 0.85rem; padding: 6px 12px; border-radius: 20px; transition: all 0.3s; }
.nav-links a:hover, .nav-links a.active { background: var(--pink1); color: #fff; }
.lang-btn { background: var(--grad); color: #fff; border: none; padding: 6px 14px; border-radius: 20px; cursor: pointer; font-size: 0.8rem; font-weight: 600; }
.lang-btn:hover { opacity: 0.85; }

/* HERO */
.hero {
  text-align: center;
  padding: 80px 20px 60px;
  background: var(--grad);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '💕';
  position: absolute;
  font-size: 200px;
  opacity: 0.08;
  top: -30px;
  right: -30px;
  animation: float 6s ease-in-out infinite;
}
.hero h1 { font-size: 3rem; margin-bottom: 12px; }
.hero p { font-size: 1.2rem; opacity: 0.9; max-width: 600px; margin: 0 auto; }

@keyframes float {
  0%,100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(10deg); }
}

/* CARDS */
.container { max-width: 1000px; margin: 0 auto; padding: 40px 20px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 30px; }
.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
  text-decoration: none;
  color: inherit;
  display: block;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(196,69,105,0.25); }
.card-icon { font-size: 3rem; margin-bottom: 12px; }
.card h3 { color: var(--pink2); margin-bottom: 8px; font-size: 1.2rem; }
.card p { color: #777; font-size: 0.9rem; line-height: 1.5; }

/* TOOL PAGE */
.tool-section {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow);
  margin: 30px auto;
  max-width: 700px;
}
.tool-section h2 { color: var(--pink2); margin-bottom: 20px; text-align: center; font-size: 1.6rem; }
.tool-section label { display: block; font-weight: 600; margin: 16px 0 6px; color: #555; }
.tool-section select, .tool-section input[type="text"], .tool-section input[type="date"] {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #ffe0eb;
  border-radius: 12px;
  font-size: 1rem;
  outline: none;
  transition: border 0.3s;
}
.tool-section select:focus, .tool-section input:focus { border-color: var(--pink1); }

.btn {
  background: var(--grad);
  color: #fff;
  border: none;
  padding: 14px 36px;
  border-radius: 30px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  display: block;
  margin: 24px auto 0;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: scale(1.05); box-shadow: 0 6px 20px rgba(196,69,105,0.35); }

/* RESULT */
.result {
  margin-top: 30px;
  padding: 30px;
  background: var(--grad-light);
  border-radius: var(--radius);
  text-align: center;
  display: none;
  animation: fadeIn 0.5s;
}
.result.show { display: block; }
.result h3 { color: var(--pink2); font-size: 1.4rem; margin-bottom: 10px; }
.result .score { font-size: 3rem; font-weight: 800; background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.result .detail { color: #555; line-height: 1.7; margin: 16px 0; }
.share-btn {
  background: #25D366;
  color: #fff;
  border: none;
  padding: 10px 24px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.9rem;
  margin: 6px;
}
.copy-btn {
  background: var(--pink1);
  color: #fff;
  border: none;
  padding: 10px 24px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.9rem;
  margin: 6px;
}

/* QUIZ */
.quiz-option {
  display: block;
  width: 100%;
  padding: 14px 20px;
  margin: 8px 0;
  background: #fff;
  border: 2px solid #ffe0eb;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  text-align: left;
  transition: all 0.3s;
}
.quiz-option:hover { border-color: var(--pink1); background: #fff5f8; }
.quiz-option.selected { border-color: var(--pink1); background: var(--pink4); }
.quiz-progress { height: 6px; background: #ffe0eb; border-radius: 3px; margin-bottom: 20px; overflow: hidden; }
.quiz-progress-bar { height: 100%; background: var(--grad); transition: width 0.4s; border-radius: 3px; }

/* DONATION */
.donate-section {
  text-align: center;
  margin-top: 40px;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 4px 16px rgba(196,69,105,0.1);
}
.donate-section p { color: #777; margin-bottom: 12px; }
.donate-addr {
  font-family: monospace;
  font-size: 0.75rem;
  color: var(--pink2);
  word-break: break-all;
  background: var(--pink4);
  padding: 8px 12px;
  border-radius: 8px;
  display: inline-block;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 30px;
  color: #999;
  font-size: 0.85rem;
}
footer a { color: var(--pink1); text-decoration: none; }

/* HEARTS BG */
.hearts-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}
.hearts-bg span {
  position: absolute;
  font-size: 20px;
  opacity: 0.06;
  animation: rise 10s linear infinite;
}
@keyframes rise {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0.06; }
  100% { transform: translateY(-10vh) rotate(360deg); opacity: 0; }
}

/* RESPONSIVE */
@media (max-width: 600px) {
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  nav { flex-wrap: wrap; gap: 8px; }
  .nav-links { gap: 4px; }
  .tool-section { padding: 24px 16px; }
}