:root {
  --color-primary: #4ECDC4;
  --color-primary-dark: #3DBDB4;
  --color-accent: #FF6B6B;
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-text-main: #2D3436;
  --color-text-sub: #636E72;
  --color-text-light: #B2BEC3;
  --color-border: #F0F0F0;
  
  --color-cat-mint: #E0F7FA;
  --text-cat-mint: #006064;
  --color-cat-coral: #FFEBEE;
  --text-cat-coral: #C62828;
  --color-cat-blue: #E3F2FD;
  --text-cat-blue: #1565C0;
  --color-cat-purple: #F3E5F5;
  --text-cat-purple: #6A1B9A;

  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;
  --radius-pill: 9999px;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 12px 32px rgba(78, 205, 196, 0.15);
}

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

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.header {
  padding: var(--spacing-md) 0;
  background-color: transparent;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-weight: 600;
  color: var(--color-text-main);
  font-size: 16px;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.btn-signup {
  font-weight: 600;
  color: var(--color-text-sub);
  font-size: 14px;
}

.btn-signup:hover {
  color: var(--color-text-main);
}

.btn-login {
  padding: 8px 20px;
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-pill);
  font-weight: 600;
  color: white;
  font-size: 14px;
}

.btn-login:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: white;
}

.hero {
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(78, 205, 196, 0.05) 0%, rgba(250, 250, 248, 0) 100%);
  border-radius: 0 0 50% 50% / 40px;
  margin-bottom: var(--spacing-xl);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background-color: rgba(78, 205, 196, 0.1);
  color: var(--color-primary-dark);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-main);
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--color-text-sub);
  margin-bottom: var(--spacing-lg);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  border: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 8px 16px rgba(78, 205, 196, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px rgba(78, 205, 196, 0.35);
  background-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: white;
  color: var(--color-text-main);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.features {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: var(--spacing-xl);
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: white;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  font-size: 24px;
}

.feature-text {
  font-weight: 600;
  color: var(--color-text-main);
}

.main-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  margin-bottom: 80px;
}

@media (max-width: 900px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title::before {
  content: '';
  display: block;
  width: 6px;
  height: 24px;
  background-color: var(--color-primary);
  border-radius: 4px;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.tabs {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0;
}

.tab {
  background: none;
  border: none;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-sub);
  padding: 0 4px 12px 4px;
  cursor: pointer;
  position: relative;
}

.tab.active {
  color: var(--color-text-main);
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-text-main);
}

.post-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  border: 1px solid transparent;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.post-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(78, 205, 196, 0.3);
}

.post-header {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.post-badges {
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
}

.badge.mint { background-color: var(--color-cat-mint); color: var(--text-cat-mint); }
.badge.coral { background-color: var(--color-cat-coral); color: var(--text-cat-coral); }
.badge.blue { background-color: var(--color-cat-blue); color: var(--text-cat-blue); }
.badge.purple { background-color: var(--color-cat-purple); color: var(--text-cat-purple); }

.badge-situation {
  padding: 4px 10px;
  background-color: #F5F5F5;
  color: #666;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}

.post-date {
  font-size: 13px;
  color: var(--color-text-light);
  font-weight: 500;
  white-space: nowrap;
}

.post-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.4;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-sub);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
}

.meta-label {
  font-size: 11px;
  color: var(--color-text-sub);
  margin-right: 4px;
  font-weight: 600;
}

.post-meta strong {
  color: var(--color-text-main);
  font-weight: 600;
}

.divider {
  color: var(--color-border);
  font-size: 12px;
}

.btn-detail {
  padding: 10px 20px;
  background-color: var(--color-cat-mint);
  color: var(--text-cat-mint);
  border: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.btn-detail:hover {
  background-color: var(--color-primary);
  color: white;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.info-box {
  background: white;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.info-box h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text-main);
}

.guidelines-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.guidelines-list li {
  display: flex;
  gap: 10px;
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.5;
}

.guidelines-list li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 800;
}

.btn-text {
  margin-top: 16px;
  background: none;
  border: none;
  color: var(--color-text-sub);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}

.btn-text:hover {
  color: var(--color-primary);
}

.notice-box {
  background-color: #FFF8F8;
  border: 1px solid #FFEBEB;
  padding: 20px;
  border-radius: var(--radius-md);
  margin-top: 20px;
}

.notice-title {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.notice-text {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.5;
}

.footer {
  background-color: #F0F0F0;
  padding: 40px 0;
  margin-top: auto;
  border-top: 1px solid #E0E0E0;
}

.footer-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.footer-text {
  color: var(--color-text-sub);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 16px;
}

.copyright {
  color: var(--color-text-light);
  font-size: 12px;
  font-weight: 500;
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  opacity: 0.5;
}

.blob-1 {
  width: 400px;
  height: 400px;
  background-color: rgba(78, 205, 196, 0.2);
  top: -100px;
  left: -100px;
}

.blob-2 {
  width: 300px;
  height: 300px;
  background-color: rgba(255, 107, 107, 0.1);
  top: 20%;
  right: -50px;
}

@media (max-width: 600px) {
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .btn { padding: 12px 24px; width: 100%; }
  .hero-actions { flex-direction: column; }
  .post-info { gap: 16px; }
  .info-item { min-width: 45%; }
}