@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..400;1,9..144,300..400&family=Noto+Serif+KR:wght@300;400;500;700&family=Inter:wght@400;500&display=swap');

:root {
  --color-bg: #FAF9F6;
  --color-ink: #1C1C1A;
  --color-ink-light: #4A4A48;
  --color-teal: #20A9A9;
  --color-teal-dark: #188686;
  --color-paper-edge: #EBEBE6;
  --color-line: rgba(28, 28, 26, 0.1);

  --font-serif: 'Fraunces', 'Noto Serif KR', serif;
  --font-sans: 'Inter', sans-serif;

  --spacing-base: 1.5rem;
}

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

html {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-serif);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    linear-gradient(var(--color-bg) 23px, transparent 23px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px);
  background-size: 100% 24px, 1px 100%;
  background-position: 0 0, 10% 0;
  overflow-x: hidden;
}

/* For smaller screens, don't show the vertical notebook line, or move it left */
@media (max-width: 768px) {
  body {
    background-image: none; /* Just a clean paper look on mobile */
  }
}

.notebook-binding {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 10%;
  background-color: #F2F1EC;
  border-right: 1px solid var(--color-line);
  z-index: -1;
}

@media (max-width: 768px) {
  .notebook-binding {
    display: none;
  }
}

.page-wrapper {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
  padding-left: calc(10% + 4rem);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (max-width: 768px) {
  .page-wrapper {
    padding-left: 2rem;
    padding-top: 2rem;
  }
}

.brand-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 6rem;
}

@media (max-width: 768px) {
  .brand-header {
    margin-bottom: 4rem;
  }
}

.brand-icon {
  width: 28px;
  height: auto;
  display: block;
}

.brand-name {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  text-decoration: none;
}

main {
  flex: 1;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.description {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 300;
  color: var(--color-ink-light);
  max-width: 32ch;
  line-height: 1.5;
  margin-bottom: 4rem;
}

.cta-group {
  display: flex;
  flex-direction: row;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  background-color: var(--color-teal-dark);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-line);
}

.btn-secondary:hover {
  background-color: rgba(28, 28, 26, 0.05);
}

.language-switch {
  margin-top: auto;
  padding-top: 6rem;
  display: flex;
  gap: 1rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
}

.language-switch a {
  color: var(--color-ink-light);
  text-decoration: none;
  transition: color 0.2s;
}

.language-switch a:hover {
  color: var(--color-ink);
}

.language-switch a[aria-current="page"] {
  color: var(--color-ink);
  font-weight: 500;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}