/* ==========================================================================
   Kris Evans, PhD — personal site
   Design system from launch-playbook.md
   --------------------------------------------------------------------------
   Palette : cream #F8F6F2 · near-black #1A1A1A · bronze #8B6F47
             lighter cream #EDE7DA · gold #C9A875
   Type    : Cormorant Garamond (serif headings) · Inter (sans body)
   ========================================================================== */

:root {
  --bg:        #F8F6F2;   /* warm cream — site default            */
  --bg-alt:    #EDE7DA;   /* lighter cream — alternating sections */
  --ink:       #1A1A1A;   /* near-black text                      */
  --bronze:    #8B6F47;   /* links, eyebrow text                  */
  --bronze-dk: #6f583789; /* hairline borders                     */
  --dark:      #1A1A1A;   /* dark sections / footer               */
  --gold:      #C9A875;   /* accent on dark backgrounds           */
  --cream-on-dark: #F4EFE6;

  --serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --maxw: 1120px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--bronze); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.4rem, 6vw, 3.25rem); }   /* ~52px desktop */
h2 { font-size: clamp(1.6rem, 4vw, 1.95rem); }   /* ~28px         */
h3 { font-size: 1.18rem; font-weight: 600; }     /* ~18px         */
p  { margin: 0 0 1.1em; max-width: 64ch; }

.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bronze);
  margin: 0 0 1rem;
}
.eyebrow.on-dark { color: var(--gold); }

/* ---------- layout helpers ---------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(3.5rem, 9vw, 6.5rem); }
.section--alt  { background: var(--bg-alt); }
.section--dark { background: var(--dark); color: var(--cream-on-dark); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--cream-on-dark); }
.section--narrow .wrap { max-width: 720px; }
.center { text-align: center; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 13px 30px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: transparent;
  transition: background .18s ease, color .18s ease;
}
.btn:hover { background: var(--ink); color: var(--bg); text-decoration: none; }
.btn.on-dark { color: var(--cream-on-dark); border-color: var(--gold); }
.btn.on-dark:hover { background: var(--gold); color: var(--dark); }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(248,246,242,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 0.5px solid var(--bronze-dk);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 1.05rem;
}
.brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 1.6rem; align-items: center; }
.nav a {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--bronze); text-decoration: none; }
.nav a[aria-current="page"] { font-weight: 600; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: .3rem; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; transition: .2s; }

/* ---------- hero ---------- */
.hero { padding-block: clamp(3rem, 8vw, 6rem); }
.hero .portrait {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 22%;   /* bias crop toward the face */
  width: 100%;
  border-radius: 2px;
}
.hero .tags {
  font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--bronze); margin-top: 1.5rem;
}
.hero .lede { font-size: 1.05rem; color: #3a352e; }

/* ---------- pull quote ---------- */
.pullquote {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  line-height: 1.35;
  max-width: 22ch;
  margin: 0 auto 1.25rem;
}

/* ---------- cards ---------- */
article.card { border-top: 2px solid var(--bronze); padding-top: 1.05rem; }
.card .thumb {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #e7ddca, #d9cbb0);
  border-radius: 2px;
  margin-bottom: 1rem;
}
.card h3 { margin-bottom: .35rem; }
.card p { font-size: 0.95rem; color: #45403a; }

/* ---------- placeholder media frame ---------- */
.media-frame {
  aspect-ratio: 16 / 9;
  width: 100%;
  border-radius: 2px;
  background:
    radial-gradient(circle at 50% 45%, rgba(201,168,117,0.25), transparent 60%),
    #14130f;
  display: grid; place-items: center;
  color: var(--gold);
  font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
}

/* ---------- responsive video embed (16:9) ---------- */
.embed-16x9 { position: relative; padding-top: 56.25%; border-radius: 2px; overflow: hidden; }
.embed-16x9 iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- podcast episode ---------- */
.episode { margin: 1.25rem 0 0; max-width: 640px; }

/* ---------- definition list / topics ---------- */
.topic h3 { margin-bottom: .3rem; }
.topic p  { font-size: 0.95rem; color: #45403a; }

/* ---------- lists in prose ---------- */
.prose ul { padding-left: 1.1rem; }
.prose li { margin-bottom: .5rem; max-width: 64ch; }

/* ---------- publications ---------- */
.pubs li { margin-bottom: 1rem; line-height: 1.5; max-width: 72ch; }
.pubs strong { color: var(--ink); }

/* ---------- contact form ---------- */
.field { margin-bottom: 1.25rem; }
.field label { display: block; font-size: 0.8rem; font-weight: 600; letter-spacing: .04em; margin-bottom: .4rem; }
.field input, .field select, .field textarea {
  width: 100%; padding: .7rem .8rem; font-family: var(--sans); font-size: 1rem;
  background: #fff; border: 1px solid var(--bronze-dk); border-radius: 2px; color: var(--ink);
}
.field textarea { min-height: 140px; resize: vertical; }

/* ---------- footer ---------- */
.site-footer { background: var(--dark); color: var(--cream-on-dark); padding-block: 3.5rem 2rem; }
.site-footer a { color: var(--gold); }
.site-footer .cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; margin-bottom: 2.5rem; }
.site-footer h4 { color: var(--cream-on-dark); font-size: 1rem; margin-bottom: .6rem; }
.site-footer p, .site-footer li { font-size: 0.9rem; color: #cdc6ba; margin-bottom: .4rem; line-height: 1.5; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer .copy { text-align: center; font-size: 0.8rem; color: #9b948a; border-top: 0.5px solid #3a352e; padding-top: 1.5rem; }

/* ---------- spacing utilities ---------- */
.mt-1 { margin-top: 1rem; } .mt-2 { margin-top: 2rem; } .mb-0 { margin-bottom: 0; }
.stack > * + * { margin-top: 1.1rem; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero .grid-2 { gap: 2rem; }
  .hero .portrait { max-width: 360px; margin-inline: auto; }
  .site-footer .cols { grid-template-columns: 1fr; gap: 1.5rem; }

  .nav {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0; align-items: stretch;
    background: var(--bg); border-bottom: 0.5px solid var(--bronze-dk);
    max-height: 0; overflow: hidden; transition: max-height .25s ease;
  }
  .nav.open { max-height: 360px; }
  .nav a { padding: .9rem var(--gutter); border-top: 0.5px solid var(--bronze-dk); }
  .nav-toggle { display: block; }
}