:root {
  --color-primary: #16875a;
  --color-primary-dark: #23543c;
  --color-accent: #c45f00;

  --color-bg: #fbfaf7;
  --color-nav: #ffffff;
  --color-bg-pattern-1: #fff1dc;
  --color-bg-pattern-2: #e6f4ec;
  --color-soft-box: #fff8ed;

  --color-step-1: #bcf3cc;
  --color-step-2: #bad7ff;
  --color-step-3: #ffbcb4;

  --color-text-main: #111111;
  --color-text-sub: #4b5563;

  --font-size-normal: 18px;
  --font-size-large: 22px;
  --font-size-xlarge: 26px;

  --container-width: 1280px;
  --header-width: 1480px;
  --header-height: 90px;
  --nav-scale: 1;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Pretendard", "Noto Sans KR", "Malgun Gothic", sans-serif;
  font-size: var(--font-size-normal);
  color: var(--color-text-main);
  background: var(--color-bg);
  overflow-x: hidden;
}

body.font-normal {
  font-size: var(--font-size-normal);
}

body.font-large {
  font-size: var(--font-size-large);
  --nav-scale: 1.12;
}

body.font-xlarge {
  font-size: var(--font-size-xlarge);
  --nav-scale: 1.24;
}

.container {
  width: min(calc(100% - 96px), var(--container-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: calc(var(--header-height) * var(--nav-scale));
  background: var(--color-nav);
  border-bottom: 2px solid #e5e7eb;
}

.site-nav {
  width: min(calc(100% - 96px), var(--header-width));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-area {
  width: calc(230px * var(--nav-scale));
  height: calc(58px * var(--nav-scale));
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-area img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: calc(48px * var(--nav-scale));
}

.nav-menu a {
  font-size: calc(1rem * var(--nav-scale));
  font-weight: 800;
}

.start-link {
  padding: calc(18px * var(--nav-scale)) calc(24px * var(--nav-scale));
  border-radius: calc(16px * var(--nav-scale));
  background: var(--color-primary);
  color: #ffffff;
}

.font-size-control {
  position: fixed;
  right: 64px;
  bottom: 56px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-radius: 18px;
  background: #f5f5f5;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.font-size-control span {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-text-sub);
  white-space: nowrap;
}

.font-size-control button {
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  background: #ffffff;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

.font-size-control button.active {
  background: #ef7d00;
  color: #ffffff;
  border-color: #ef7d00;
}

@media (max-width: 1024px) {
  body.font-large {
    --nav-scale: 1.06;
  }

  body.font-xlarge {
    --nav-scale: 1.1;
  }

  .site-nav {
    width: min(calc(100% - 48px), var(--header-width));
  }

  .nav-menu {
    gap: calc(28px * var(--nav-scale));
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 76px;
  }

  body.font-large,
  body.font-xlarge {
    --nav-scale: 1;
  }

  .container,
  .site-nav {
    width: min(calc(100% - 32px), var(--container-width));
  }

  .logo-area {
    width: 150px;
    height: 46px;
  }

  .nav-menu {
    gap: 18px;
  }

  .nav-menu a {
    font-size: 0.9rem;
  }

  .start-link {
    padding: 12px 16px;
    border-radius: 12px;
  }

  .font-size-control {
    right: 16px;
    bottom: 16px;
    max-width: calc(100% - 32px);
    padding: 12px;
    gap: 8px;
    flex-wrap: wrap;
  }

  .font-size-control button {
    min-height: 40px;
    padding: 0 14px;
  }
}