:root {
  --bg: #ffffff;
  --bg-alt: #f6f6f8;
  --text: #111111;
  --text-muted: #666666;
  --border: #e2e2e6;
  --accent: #111827;
  --accent-soft: #e5e7eb;
  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.06);
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Noto Sans KR", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(226, 226, 230, 0.6);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 0.95rem;
}

.nav a {
  margin-left: 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

/* Hero */

.hero {
  padding: 80px 0 72px;
}

.hero-inner {
  display: flex;
  align-items: center;
}

.hero-text h1 {
  font-size: 2rem;
  line-height: 1.4;
  margin: 0 0 16px;
}

.hero-text p {
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease,
    transform 0.05s ease;
}

.btn.primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: var(--shadow-soft);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.12);
}

.btn.ghost {
  border-color: var(--border);
  background: #ffffff;
  color: var(--text);
}

.btn.ghost:hover {
  background: var(--bg-alt);
}

/* Sections */

.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section h2 {
  margin: 0 0 12px;
  font-size: 1.5rem;
}

.section-intro {
  margin: 0 0 32px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Grid */

.grid {
  display: grid;
  gap: 24px;
}

.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.three-col {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 900px) {
  .two-col,
  .three-col {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 56px;
  }
}

/* Lists */

.list {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.list li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 16px;
  font-size: 0.95rem;
}

.list li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--text-muted);
}

/* Cards */

.cards {
  align-items: stretch;
}

.card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 18px 18px 20px;
  border: 1px solid rgba(226, 226, 230, 0.8);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.02);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Badge */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--accent-soft);
  background: #f9fafb;
  font-size: 0.75rem;
  color: #4b5563;
  margin-bottom: 10px;
}

/* Contact */

.contact-box {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  border: 1px solid rgba(226, 226, 230, 0.9);
  box-shadow: var(--shadow-soft);
  max-width: 520px;
}

.contact-email a {
  font-size: 1rem;
  font-weight: 600;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 32px;
  background: #ffffff;
}

.footer-inner {
  text-align: center;
}

.footer-inner p {
  margin: 4px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}