@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&display=swap");

:root {
  --primary-color: #4fc3f7;
  --secondary-color: #ff8a65;
  --bg-color: #f1f8e9;
  --text-color: #37474f;
  --card-bg: #ffffff;
}

body {
  font-family: 'Noto Sans KR', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

nav {
  background: white;
  padding: 1rem 2rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav .logo { font-weight: 700; color: #4db6ac; text-decoration: none; }
nav .nav-links a { margin-left: 1.5rem; text-decoration: none; color: #666; font-size: 0.9rem; }

.container {
  max-width: 850px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

header { text-align: center; margin-bottom: 4rem; }
header h1 { font-size: 2.2rem; color: #2e7d32; margin-bottom: 1rem; }
header p { color: #546e7a; }

.card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  margin-bottom: 2rem;
}

h3 { color: #2e7d32; margin-bottom: 1.5rem; }

.symptom-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.symptom-btn {
  padding: 1.2rem;
  background: #f1f8e9;
  border: 2px solid #c8e6c9;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
  color: #388e3c;
  transition: all 0.2s;
}

.symptom-btn:hover { background: #e8f5e9; border-color: #81c784; }
.symptom-btn.active { background: #388e3c; color: white; border-color: #388e3c; box-shadow: 0 4px 12px rgba(56, 142, 60, 0.3); }

.empty-state {
  text-align: center;
  padding: 3rem;
  color: #90a4ae;
  background: white;
  border-radius: 20px;
  border: 2px dashed #cfd8dc;
}

.solution-card h3 { border-bottom: 2px solid #e8f5e9; padding-bottom: 1rem; color: #388e3c; }

.content-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

h4 { margin-bottom: 1rem; font-size: 1.1rem; }
.reason-section h4 { color: #546e7a; }
.action-section h4 { color: #d84315; }

ul { padding-left: 1.2rem; margin: 0; }
li { margin-bottom: 0.8rem; font-size: 0.95rem; }

.special-tip { background: #fff3e0; border: 1px solid #ffe0b2; }
.special-tip h3 { color: #e65100; }
.tip-list { display: flex; flex-direction: column; gap: 1.5rem; }
.tip-item strong { display: block; color: #bf360c; margin-bottom: 0.3rem; }
.tip-item p { margin: 0; font-size: 0.9rem; color: #5d4037; }

.home-link { display: block; text-align: center; margin-top: 4rem; color: #999; text-decoration: none; }

footer { text-align: center; padding: 4rem 2rem; color: #999; font-size: 0.85rem; }

@media (max-width: 600px) {
  .symptom-grid, .content-split { grid-template-columns: 1fr; }
}