/* Leaf by Leaf Blog — design system extracted from app.leafbyleaf.net */

:root {
  --color-forest:       #3F5B46;
  --color-forest-deep:  #2E4434;
  --color-forest-soft:  #6B856F;
  --color-burnt-orange: #C25D2A;
  --color-paper:        #F2E9DD;
  --color-paper-warm:   #EADFCE;
  --color-cream:        #FBF6EE;
  --color-sage:         #A7B494;
  --color-sage-mist:    #E3E8DA;
  --color-ink:          #2B2B2B;
  --color-ink-soft:     #4A4A4A;
  --color-rule:         rgba(63, 91, 70, 0.15);

  --serif: "Playfair Display", Georgia, serif;
  --sans:  "Lora", Georgia, serif;
  --mono:  "JetBrains Mono", "Courier New", monospace;

  --ease-calm: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-base:  220ms;

  --max-width: 720px;
  --nav-height: 56px;
}

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

html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--sans);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Navigation ─────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.nav-brand {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-forest);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-links a {
  font-family: var(--sans);
  font-size: 15px;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color var(--dur-base) var(--ease-calm);
}

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

/* ── Main container ──────────────────────────────────────── */

.main {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 56px 24px 80px;
  flex: 1;
}

/* ── Index page ──────────────────────────────────────────── */

.index-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-rule);
}

.index-title {
  font-family: var(--serif);
  font-size: 48px;
  font-weight: 700;
  color: var(--color-forest-deep);
  line-height: 1.1;
  margin-bottom: 12px;
}

.index-subtitle {
  font-family: var(--sans);
  font-size: 17px;
  color: var(--color-ink-soft);
  font-style: italic;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--color-rule);
  display: grid;
  grid-template-columns: 140px 1fr;
  grid-template-rows: auto auto;
  column-gap: 24px;
  align-items: start;
}

.post-item .post-date {
  grid-row: 1;
  padding-top: 3px;
}

.post-item .post-title {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  line-height: 1.3;
  transition: color var(--dur-base) var(--ease-calm);
}

.post-item .post-title:hover {
  color: var(--color-burnt-orange);
}

.post-item .post-teaser {
  grid-column: 2;
  grid-row: 2;
  font-size: 15px;
  color: var(--color-ink-soft);
  margin-top: 6px;
  line-height: 1.6;
}

/* ── Post page ───────────────────────────────────────────── */

.post-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-rule);
}

.post-date {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--color-forest-soft);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.post-title-display {
  font-family: var(--serif);
  font-size: 48px;
  font-weight: 700;
  color: var(--color-forest-deep);
  line-height: 1.15;
}

/* ── Post content (rendered markdown) ───────────────────── */

.post-content {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-ink);
}

.post-content h1,
.post-content h2,
.post-content h3 {
  font-family: var(--serif);
  color: var(--color-forest-deep);
  line-height: 1.2;
  margin-top: 2.5em;
  margin-bottom: 0.75em;
}

.post-content h1 { font-size: 32px; font-weight: 700; }
.post-content h2 { font-size: 26px; font-weight: 600; }
.post-content h3 { font-size: 20px; font-weight: 600; }

.post-content p {
  margin-bottom: 1.5em;
}

.post-content em {
  font-style: italic;
  color: var(--color-ink);
}

.post-content strong {
  font-weight: 600;
  color: var(--color-forest-deep);
}

.post-content blockquote {
  border-left: 3px solid var(--color-burnt-orange);
  padding-left: 20px;
  margin: 2em 0;
  color: var(--color-ink-soft);
  font-style: italic;
}

.post-content a {
  color: var(--color-forest);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur-base) var(--ease-calm);
}

.post-content a:hover {
  color: var(--color-burnt-orange);
}

.post-content ul,
.post-content ol {
  padding-left: 1.5em;
  margin-bottom: 1.5em;
}

.post-content li {
  margin-bottom: 0.5em;
}

.post-content code {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--color-sage-mist);
  padding: 2px 6px;
  border-radius: 3px;
}

/* ── Post navigation ─────────────────────────────────────── */

.post-nav {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--color-rule);
}

.post-nav-back {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--color-forest-soft);
  text-decoration: none;
  transition: color var(--dur-base) var(--ease-calm);
}

.post-nav-back:hover {
  color: var(--color-forest-deep);
}

/* ── Footer ──────────────────────────────────────────────── */

.footer {
  border-top: 1px solid var(--color-rule);
  padding: 24px;
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-sage);
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 600px) {
  .post-item {
    grid-template-columns: 1fr;
  }

  .post-item .post-date {
    grid-row: 1;
  }

  .post-item .post-title {
    grid-column: 1;
    grid-row: 2;
  }

  .post-item .post-teaser {
    grid-column: 1;
    grid-row: 3;
  }

  .index-title,
  .post-title-display {
    font-size: 36px;
  }
}