/* ==========================================================================
   Shared styling for individual blog post pages
   Inherits the same tokens as the main site (Host Grotesk, light theme).
   ========================================================================== */
:root {
  --bg:        #fafaf9;
  --surface:   #ffffff;
  --surface-2: #f3f3f1;
  --ink:       #16150f;
  --ink-soft:  #57544c;
  --line:      #e6e4df;
  --accent:    #0f7a5a;
  --accent-2:  #0c6249;
  --accent-tint:#e7f3ee;
  --on-accent: #ffffff;
  --prose:     #2c2a22;
  --font-sans: "Host Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius: 16px;
  --radius-sm: 10px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --dur: .35s;
}
:root[data-theme="dark"] {
  --bg:         #121210;
  --surface:    #1b1a17;
  --surface-2:  #232019;
  --ink:        #f5f3ee;
  --ink-soft:   #b7b2a5;
  --line:       #34312a;
  --accent:     #3ddc97;
  --accent-2:   #29c081;
  --accent-tint:#17332a;
  --on-accent:  #06231a;
  --prose:      #dcd8cc;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:         #121210;
    --surface:    #1b1a17;
    --surface-2:  #232019;
    --ink:        #f5f3ee;
    --ink-soft:   #b7b2a5;
    --line:       #34312a;
    --accent:     #3ddc97;
    --accent-2:   #29c081;
    --accent-tint:#17332a;
    --on-accent:  #06231a;
    --prose:      #dcd8cc;
  }
}
:root { color-scheme: light dark; }
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: clamp(1.05rem, 1rem + .3vw, 1.18rem);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent-2); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap {
  width: 100%;
  max-width: 44rem;          /* comfortable reading measure */
  margin-inline: auto;
  padding-inline: clamp(1.1rem, 5vw, 2rem);
}

/* ---- Top bar ---- */
.post-nav {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  position: sticky; top: 0; z-index: 50;
}
.post-nav .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 4rem;
}
.back-link {
  display: inline-flex; align-items: center; gap: .5rem;
  font-weight: 600; font-size: .95rem; color: var(--ink); text-decoration: none;
  transition: gap var(--dur) var(--ease);
}
.back-link:hover { gap: .8rem; }
.brand-mini { font-weight: 700; font-size: .95rem; color: var(--ink-soft); text-decoration: none; }
.brand-mini:hover { color: var(--ink); }

.nav-end { display: flex; align-items: center; gap: 1rem; }

/* Theme toggle */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  width: 2.2rem; height: 2.2rem;
  border: 0; border-radius: 999px;
  background: transparent; color: var(--ink-soft);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.theme-toggle:hover { background: var(--accent-tint); color: var(--accent-2); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (max-width: 760px) {
  .theme-toggle { width: 2.75rem; height: 2.75rem; }
}
.theme-icon { display: block; }
.theme-icon-moon { display: none; }
:root[data-theme="dark"] .theme-icon-sun { display: none; }
:root[data-theme="dark"] .theme-icon-moon { display: block; }

/* ---- Article ---- */
.post-header { padding-block: clamp(2.5rem, 7vw, 4.5rem) clamp(1.5rem, 4vw, 2.5rem); }
.post-eyebrow {
  font-size: .8rem; letter-spacing: .14em; text-transform: uppercase;
  font-weight: 600; color: var(--accent); margin-bottom: 1rem;
}
.post-h1 {
  font-weight: 700;
  font-size: clamp(2rem, 1.3rem + 3.6vw, 3.4rem);
  line-height: 1.08; letter-spacing: -.02em;
}
.post-byline {
  margin-top: 1.25rem; color: var(--ink-soft);
  font-size: .92rem; font-weight: 500;
  display: flex; flex-wrap: wrap; gap: .5rem; align-items: center;
}
.post-byline .sep { opacity: .5; }

.post-hero {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 120% at 20% 10%, var(--accent-tint), transparent 60%),
    linear-gradient(160deg, var(--surface-2), var(--surface));
  display: grid; place-items: center;
  color: var(--ink-soft); font-size: .85rem; letter-spacing: .04em;
  margin-bottom: clamp(2rem, 5vw, 3rem);
  overflow: hidden;
}
.post-hero img { width: 100%; height: 100%; object-fit: cover; }

/* Opening epigraph — quiet, sits under the headline, before the byline.
   Distinct from .post-body blockquote, which is a louder mid-argument pull-quote. */
.post-epigraph {
  max-width: 26rem;
  margin: 1.6rem auto clamp(1.6rem, 4vw, 2.2rem);
  text-align: center;
}
.post-epigraph blockquote {
  margin: 0;
  font-size: 1.05em;
  font-style: italic;
  line-height: 1.5;
  color: var(--ink-soft);
}
.post-epigraph figcaption {
  margin-top: .5rem;
  font-size: .82rem;
  color: var(--ink-soft);
  opacity: .8;
}

.post-body { padding-bottom: clamp(3rem, 8vw, 5rem); }
.post-body > * + * { margin-top: 1.4rem; }
.post-body h2 {
  font-weight: 600; font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.9rem);
  line-height: 1.2; letter-spacing: -.01em;
  margin-top: 2.6rem;
}
.post-body h3 { font-weight: 600; font-size: 1.2rem; margin-top: 2rem; }
.post-body p { color: var(--prose); }
.post-body ul, .post-body ol { padding-left: 1.3rem; color: var(--prose); }
.post-body li { margin-top: .5rem; }
.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding: .4rem 0 .4rem 1.3rem;
  color: var(--ink-soft);
  font-size: 1.15em;
  font-style: italic;
}
.post-body code {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .12em .4em;
  font-size: .9em;
}
.post-body hr { border: 0; border-top: 1px solid var(--line); margin-block: 2.5rem; }
.post-figure {
  margin-block: 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.post-figure img { width: 100%; height: auto; display: block; }
.post-figure figcaption {
  padding: .7rem 1rem;
  font-size: .85rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  text-align: center;
}

/* ---- Footer / next ---- */
.post-footer {
  border-top: 1px solid var(--line);
  padding-block: 2.5rem;
}
.post-footer .wrap {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
}
.btn-back {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .8rem 1.3rem; border-radius: 999px;
  background: var(--accent); color: var(--on-accent); font-weight: 600; text-decoration: none;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn-back:hover { background: var(--accent-2); transform: translateY(-2px); }
.post-footer small { color: var(--ink-soft); }
.post-footer small a.foot-email {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.post-footer small a.foot-email:hover { color: var(--accent-2); border-bottom-color: var(--accent); }

/* ==========================================================================
   INDEX PAGE — /posts/  (listing all writing)
   ========================================================================== */
.index-header { padding-block: clamp(2.5rem, 7vw, 4.5rem) clamp(1.5rem, 4vw, 2.5rem); }
.index-h1 { font-weight: 700; font-size: clamp(2rem, 1.3rem + 3.4vw, 3.2rem); line-height: 1.08; letter-spacing: -.02em; }
.index-sub { margin-top: 1.1rem; color: var(--ink-soft); font-size: clamp(1.05rem, 1rem + .4vw, 1.2rem); max-width: 48ch; }

.index-list { list-style: none; padding: 0; display: flex; flex-direction: column; border-top: 1px solid var(--line); padding-bottom: clamp(3rem, 8vw, 5rem); }
.index-item { border-bottom: 1px solid var(--line); }
.index-link {
  display: grid; grid-template-columns: 1fr; grid-template-areas: "meta" "title" "excerpt";
  gap: .55rem; padding: clamp(1.4rem, 4vw, 2.1rem) 0; text-decoration: none; color: inherit;
  transition: padding-left var(--dur) var(--ease);
}
.index-link:hover { padding-left: .65rem; }
.index-meta { grid-area: meta; display: flex; align-items: center; gap: .5rem; font-size: .8rem; font-weight: 600; letter-spacing: .02em; color: var(--ink-soft); text-transform: uppercase; }
.index-dot { opacity: .5; }
.index-item-title { grid-area: title; font-weight: 600; font-size: clamp(1.3rem, 1rem + 2vw, 2rem); line-height: 1.15; letter-spacing: -.01em; color: var(--ink); transition: color var(--dur) var(--ease); }
.index-link:hover .index-item-title { color: var(--accent-2); }
.index-excerpt { grid-area: excerpt; color: var(--ink-soft); font-size: .98rem; max-width: 62ch; }
.index-arrow { grid-area: arrow; align-self: center; justify-self: end; font-size: 1.4rem; color: var(--ink-soft); transform: translateX(-6px); opacity: 0; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), color var(--dur) var(--ease); }
.index-link:hover .index-arrow { opacity: 1; transform: translateX(0); color: var(--accent-2); }

@media (min-width: 620px) {
  .index-link {
    grid-template-columns: 1fr auto;
    grid-template-areas: "meta arrow" "title arrow" "excerpt arrow";
    column-gap: 2rem;
  }
}