:root {
  --color-bg: #f7fbfc;
  --color-primary: #0d4f5c;
  --color-accent: #2a9d8f;
  --color-muted: #457b9d;
  --font-sans: 'Noto Sans KR', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: #1d3557;
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  border: none;
  cursor: pointer;
}

.btn--small {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.btn:hover {
  background: #238276;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(247, 251, 252, 0.98);
  border-bottom: 1px solid rgba(13, 79, 92, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.site-title {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
}

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

.nav-toggle {
  display: none;
  width: 24px;
  height: 24px;
  border: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%230d4f5c'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 6h16M4 12h16M4 18h16'/%3E%3C/svg%3E") center/contain no-repeat;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 8rem 2rem 4rem;
  background: linear-gradient(160deg, #e8f4f6 0%, #b8e0d8 60%, #7fc8b4 100%);
  color: #0d4f5c;
  text-align: center;
}

.hero-tagline {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  opacity: 0.9;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hero-desc {
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

.hero .btn {
  background: var(--color-primary);
}

.hero .btn:hover {
  background: #0a3d47;
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section--alt {
  background: #e8f4f6;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--color-primary);
}

/* Departments */
.dept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.dept-card {
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(13, 79, 92, 0.08);
  border: 1px solid rgba(42, 157, 143, 0.2);
}

.dept-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 1rem;
}

.dept-card h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.dept-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Hours */
.hours-table {
  width: 100%;
  max-width: 360px;
  border-collapse: collapse;
}

.hours-table td {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(13, 79, 92, 0.12);
}

.hours-table td:first-child {
  color: var(--color-muted);
  font-weight: 500;
}

/* Staff */
.staff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.staff-card {
  text-align: center;
}

.staff-photo {
  width: 120px;
  height: 120px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #b8e0d8, #7fc8b4);
}

.staff-card h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.staff-card p {
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* Location */
.location-address {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-primary);
}

.location-note {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.map-placeholder {
  height: 240px;
  background: #d4e8e4;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

/* Contact */
.contact-inner p {
  margin-bottom: 0.5rem;
  color: #1d3557;
}

/* Footer */
.footer {
  padding: 1.5rem;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.85rem;
  border-top: 1px solid rgba(13, 79, 92, 0.1);
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .section {
    padding: 3rem 0;
  }
}