/* ==========================================================================
   Ninefold — shared stylesheet
   Brand: Kinfolk / School of Life / Penguin Classics editorial aesthetic
   Palette: cream #F5F1E8, sage #7A8471, terracotta #C87456, ink #1C1C1A
   Typography: serif display, sans body — system fonts only, no CDN
   ========================================================================== */

/* --------------------------------------------------------------------------
   Custom properties — change brand values here only
   -------------------------------------------------------------------------- */
:root {
  /* Palette */
  --color-cream:      #F5F1E8;
  --color-sage:       #7A8471;
  --color-terracotta: #C87456;
  --color-ink:        #1C1C1A;
  --color-ink-muted:  #4A4A47;
  --color-border:     #D9D4C7;

  /* Typography */
  --font-display: "Iowan Old Style", "Charter", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --font-body:    system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;

  /* Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.375rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.25rem;
  --text-4xl:  3rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-prose: 720px;
  --max-wide:  960px;
}

/* --------------------------------------------------------------------------
   Reset and base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-cream);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Skip link (accessibility)
   -------------------------------------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-ink);
  color: var(--color-cream);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: 0 0 4px 4px;
  text-decoration: none;
  z-index: 999;
}
.skip-link:focus {
  top: 0;
}

/* --------------------------------------------------------------------------
   Layout helpers
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-prose);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--wide {
  width: 100%;
  max-width: var(--max-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* --------------------------------------------------------------------------
   Site header
   -------------------------------------------------------------------------- */
.site-header {
  padding-block: var(--space-8);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
}

.site-header__wordmark {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  text-decoration: none;
  line-height: 1.1;
}

.site-header__byline {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-sage);
  letter-spacing: 0.04em;
}

/* --------------------------------------------------------------------------
   Hero section
   -------------------------------------------------------------------------- */
.hero {
  padding-block: var(--space-20) var(--space-16);
}

.hero__eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-sage);
  margin-bottom: var(--space-6);
}

.hero__headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--space-6);
}

.hero__body {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-ink-muted);
  max-width: 60ch;
  margin-bottom: var(--space-10);
}

.hero__form-area {
  margin-bottom: var(--space-4);
}

.hero__post-submit {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-sage);
  margin-top: var(--space-3);
}

.hero__disclaimer {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin-top: var(--space-4);
  letter-spacing: 0.02em;
}

/* --------------------------------------------------------------------------
   Free guide section
   -------------------------------------------------------------------------- */
.guide-section {
  padding-block: var(--space-16);
  border-top: 1px solid var(--color-border);
}

.guide-section__heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin-bottom: var(--space-4);
}

.guide-section__body {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink-muted);
  max-width: 56ch;
  margin-bottom: var(--space-6);
}

.guide-section__link {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-terracotta);
  text-decoration: none;
  border-bottom: 1px solid var(--color-terracotta);
  padding-bottom: 2px;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.guide-section__link:hover,
.guide-section__link:focus {
  color: var(--color-ink);
  border-color: var(--color-ink);
}

/* --------------------------------------------------------------------------
   Site footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-border);
}

.site-footer__text {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
}

/* --------------------------------------------------------------------------
   Types page — back link
   -------------------------------------------------------------------------- */
.back-link {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-sage);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.back-link:hover,
.back-link:focus {
  color: var(--color-ink);
  border-color: var(--color-ink);
}

/* --------------------------------------------------------------------------
   Types page — page header
   -------------------------------------------------------------------------- */
.types-header {
  padding-block: var(--space-16) var(--space-10);
  border-bottom: 1px solid var(--color-border);
}

.types-header__headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: var(--space-3);
  line-height: 1.15;
}

.types-header__subhead {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-sage);
  letter-spacing: 0.03em;
}

/* --------------------------------------------------------------------------
   Types grid
   -------------------------------------------------------------------------- */
.types-section {
  padding-block: var(--space-12);
}

.types-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

/* Tablet: 2 columns */
@media (min-width: 640px) {
  .types-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop: 3 columns */
@media (min-width: 960px) {
  .types-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Type card
   -------------------------------------------------------------------------- */
.type-card {
  background-color: transparent;
  border: 1px solid var(--color-border);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.type-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-ink);
  letter-spacing: -0.01em;
  line-height: 1.2;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-1);
}

.type-card__row {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.type-card__label {
  font-weight: 500;
  color: var(--color-sage);
  letter-spacing: 0.02em;
}

.type-card__value {
  color: var(--color-ink-muted);
}

.type-card__value--example {
  color: var(--color-terracotta);
}

/* --------------------------------------------------------------------------
   Types page — footer link area
   -------------------------------------------------------------------------- */
.types-footer-nav {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   Responsive headline scaling
   -------------------------------------------------------------------------- */
@media (min-width: 640px) {
  .hero__headline {
    font-size: var(--text-4xl);
  }

  .types-header__headline {
    font-size: var(--text-4xl);
  }
}

/* --------------------------------------------------------------------------
   Utility: visually hidden (for screen readers)
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}