@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;900&display=swap');

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: light dark;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--tr-base), color var(--tr-base);
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-text);
}
h1 { font-size: var(--fs-2xl); margin-bottom: var(--sp-4); }
h2 { font-size: var(--fs-xl); margin-bottom: var(--sp-3); }
h3 { font-size: var(--fs-lg); margin-bottom: var(--sp-3); }
h4 { font-size: var(--fs-md); margin-bottom: var(--sp-2); }

p { margin-bottom: var(--sp-3); }

a { color: var(--color-primary); text-decoration: none; transition: color var(--tr-fast); }
a:hover { color: var(--color-primary-hover); text-decoration: underline; }

ul, ol { padding-left: var(--sp-5); margin-bottom: var(--sp-3); }
li { margin-bottom: var(--sp-1); }

img, svg { max-width: 100%; display: block; }

button { font-family: inherit; font-size: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }

::selection { background-color: var(--color-primary); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-surface); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary-light); }

:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  padding: var(--sp-3) var(--sp-4);
  background: var(--color-primary); color: #fff; z-index: 100;
}
.skip-link:focus { left: var(--sp-3); top: var(--sp-3); }