/* =========================================================
   MARKESHA KIRKMAN — Design System
   Deep system. Simple surface. Fully human.
   ========================================================= */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;1,9..144,400;1,9..144,500&family=Inter:wght@300;400;500;600;700&family=Caveat:wght@500;600&display=swap');

/* ---------- Tokens ---------- */
:root{
  /* warm neutral foundation */
  --bg:            #F5F0E7;
  --bg-alt:        #ECE3D3;
  --bg-warm:       #E7DAC4;
  --paper:         #FBF8F2;

  --ink:           #17140F;
  --ink-soft:      #4A4436;
  --ink-faint:     #8A8071;

  --black:         #0B0A08;
  --black-soft:    #17140F;
  --on-black:      #F1EBDD;
  --on-black-soft: #B9AF9C;

  --gold:          #B4884A;
  --rust:          #A0502A;
  --line:          rgba(23,20,15,0.14);
  --line-on-black: rgba(241,235,221,0.16);

  --serif: 'Fraunces', 'Iowan Old Style', 'Palatino Linotype', serif;
  --sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --hand:  'Caveat', cursive;

  --container: 1320px;
  --gutter: clamp(20px, 5vw, 80px);

  --ease: cubic-bezier(.22,.61,.36,1);
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family:inherit; background:none; border:none; cursor:pointer; }
h1,h2,h3,h4,p{ margin:0; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- Layout helpers ---------- */
.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}
.section{ position:relative; padding:clamp(64px,10vw,140px) 0; }
.section-tight{ padding:clamp(40px,6vw,88px) 0; }
.on-black{ background:var(--black); color:var(--on-black); }
.on-warm{ background:var(--bg-warm); }
.on-alt{ background:var(--bg-alt); }
.on-paper{ background:var(--paper); }

.visually-hidden{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap;
}

.skip-link{
  position:absolute; left:-999px; top:0; background:var(--black); color:var(--on-black);
  padding:12px 18px; z-index:200; font-family:var(--sans); font-size:14px;
}
.skip-link:focus{ left:12px; top:12px; }

/* ---------- Typography ---------- */
.eyebrow{
  font-family:var(--sans);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--ink-faint);
  font-weight:600;
}
.on-black .eyebrow{ color:var(--on-black-soft); }
.eyebrow.gold{ color:var(--gold); }

.display-xl{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(2.6rem, 7vw, 6.4rem);
  line-height:0.98;
  letter-spacing:-0.01em;
}
.display-l{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(2.1rem, 5vw, 4.2rem);
  line-height:1.02;
  letter-spacing:-0.01em;
}
.display-m{
  font-family:var(--serif);
  font-weight:500;
  font-size:clamp(1.6rem, 3.2vw, 2.6rem);
  line-height:1.08;
}
.display-s{
  font-family:var(--serif);
  font-weight:500;
  font-size:clamp(1.3rem, 2.2vw, 1.8rem);
  line-height:1.15;
}
.italic{ font-style:italic; }
.accent{ color:var(--rust); }
.accent-gold{ color:var(--gold); }

.lede{
  font-family:var(--sans);
  font-size:clamp(1rem, 1.3vw, 1.2rem);
  color:var(--ink-soft);
  line-height:1.6;
  max-width:38em;
}
.on-black .lede{ color:var(--on-black-soft); }

.body-text{
  font-family:var(--sans);
  font-size:1rem;
  color:var(--ink-soft);
  line-height:1.7;
  max-width:36em;
}
.on-black .body-text{ color:var(--on-black-soft); }

.hand{
  font-family:var(--hand);
  font-size:1.35rem;
  color:var(--rust);
  line-height:1.25;
}
.on-black .hand{ color:var(--gold); }

.small-caps-link{
  font-family:var(--sans);
  font-size:13px;
  letter-spacing:.06em;
  font-weight:600;
  text-transform:uppercase;
  display:inline-flex;
  align-items:center;
  gap:8px;
  border-bottom:1px solid currentColor;
  padding-bottom:4px;
}
.small-caps-link .arrow{ transition:transform .3s var(--ease); }
.small-caps-link:hover .arrow{ transform:translateX(4px); }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--sans);
  font-size:13px;
  font-weight:600;
  letter-spacing:.05em;
  text-transform:uppercase;
  padding:16px 28px;
  border:1px solid var(--ink);
  color:var(--ink);
  transition:background .35s var(--ease), color .35s var(--ease), border-color .35s var(--ease);
}
.btn:hover{ background:var(--ink); color:var(--bg); }
.btn-primary{ background:var(--ink); color:var(--bg); }
.btn-primary:hover{ background:transparent; color:var(--ink); }
.on-black .btn{ border-color:var(--on-black); color:var(--on-black); }
.on-black .btn:hover{ background:var(--on-black); color:var(--black); }
.on-black .btn-primary{ background:var(--gold); border-color:var(--gold); color:var(--black); }
.on-black .btn-primary:hover{ background:transparent; color:var(--gold); }

/* ---------- Header / Nav ---------- */
.site-header{
  position:fixed;
  top:0; left:0; right:0;
  z-index:100;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:22px var(--gutter);
  background:linear-gradient(to bottom, rgba(245,240,231,.92), rgba(245,240,231,0));
  transition:background .4s var(--ease), padding .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(245,240,231,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  padding-top:14px; padding-bottom:14px;
}
.site-header.theme-dark{
  background:linear-gradient(to bottom, rgba(11,10,8,.85), rgba(11,10,8,0));
}
.site-header.theme-dark.is-scrolled{
  background:rgba(11,10,8,.94);
  border-bottom:1px solid var(--line-on-black);
}
.brand{
  font-family:var(--serif);
  font-size:15px;
  font-weight:600;
  letter-spacing:.03em;
  line-height:1.1;
  color:var(--ink);
}
.site-header.theme-dark .brand{ color:var(--on-black); }
.brand small{
  display:block;
  font-family:var(--sans);
  font-size:9px;
  letter-spacing:.18em;
  font-weight:600;
  color:var(--gold);
  margin-top:2px;
}
.main-nav{ display:flex; align-items:center; gap:clamp(20px,3vw,44px); }
.main-nav a{
  font-family:var(--sans);
  font-size:13px;
  font-weight:600;
  letter-spacing:.05em;
  text-transform:uppercase;
  color:var(--ink-soft);
  position:relative;
  padding-bottom:4px;
}
.site-header.theme-dark .main-nav a{ color:var(--on-black-soft); }
.main-nav a::after{
  content:'';
  position:absolute; left:0; right:100%; bottom:0;
  height:1px; background:currentColor;
  transition:right .3s var(--ease);
}
.main-nav a:hover::after, .main-nav a.active::after{ right:0; }
.main-nav a.active{ color:var(--ink); }
.site-header.theme-dark .main-nav a.active{ color:var(--on-black); }

.nav-toggle{
  display:none;
  width:40px; height:40px;
  align-items:center; justify-content:center;
  color:var(--ink);
}
.site-header.theme-dark .nav-toggle{ color:var(--on-black); }
.nav-toggle .bars{ position:relative; width:22px; height:14px; display:block; }
.nav-toggle .bars span{
  display:block; position:absolute; left:0; width:100%; height:1.5px; background:currentColor;
  transition:transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle .bars span:nth-child(1){ top:0; }
.nav-toggle .bars span:nth-child(2){ top:6px; }
.nav-toggle .bars span:nth-child(3){ top:12px; }
.nav-toggle.is-open .bars span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.nav-toggle.is-open .bars span:nth-child(2){ opacity:0; }
.nav-toggle.is-open .bars span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

@media (max-width:860px){
  .main-nav{
    position:fixed; inset:0; top:0;
    background:var(--black);
    flex-direction:column;
    justify-content:center;
    gap:28px;
    transform:translateY(-100%);
    transition:transform .45s var(--ease);
    z-index:90;
  }
  .main-nav.is-open{ transform:translateY(0); }
  .main-nav a{ color:var(--on-black); font-size:22px; font-family:var(--serif); font-weight:500; text-transform:none; letter-spacing:0; }
  .nav-toggle{ display:flex; position:relative; z-index:95; }
}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--black);
  color:var(--on-black);
  padding:clamp(56px,8vw,96px) 0 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:48px;
  padding-bottom:56px;
  border-bottom:1px solid var(--line-on-black);
}
@media (max-width:760px){
  .footer-grid{ grid-template-columns:1fr; gap:36px; }
}
.footer-col h4{
  font-family:var(--sans); font-size:12px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--on-black-soft); margin-bottom:18px; font-weight:600;
}
.footer-col p{ color:var(--on-black-soft); font-size:14px; line-height:1.7; max-width:32em; }
.footer-links li{ margin-bottom:12px; }
.footer-links a{ font-size:15px; color:var(--on-black); }
.footer-links a:hover{ color:var(--gold); }
.footer-form{ display:flex; border-bottom:1px solid var(--line-on-black); padding-bottom:10px; margin-top:4px; }
.footer-form input{
  flex:1; background:none; border:none; color:var(--on-black); font-family:var(--sans); font-size:14px; padding:8px 0;
}
.footer-form input::placeholder{ color:var(--on-black-soft); }
.footer-form button{ color:var(--gold); font-size:13px; letter-spacing:.05em; text-transform:uppercase; font-weight:600; }
.footer-fine{ display:flex; justify-content:space-between; align-items:center; padding-top:28px; flex-wrap:wrap; gap:16px; }
.footer-fine p{ color:var(--on-black-soft); font-size:12px; }
.footer-social{ display:flex; gap:16px; }
.footer-social a{ color:var(--on-black-soft); font-size:16px; }
.footer-social a:hover{ color:var(--gold); }

/* ---------- Margin device (signature editorial device) ---------- */
.margin-note{
  display:flex;
  flex-direction:column;
  gap:10px;
  max-width:280px;
}
.margin-note .eyebrow{ font-size:11px; }
.margin-note p{
  font-family:var(--serif);
  font-style:italic;
  font-size:1.05rem;
  line-height:1.35;
  color:var(--ink);
}
.on-black .margin-note p{ color:var(--on-black); }

/* ---------- Evidence notation ---------- */
.evidence-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  font-weight:600;
  color:var(--rust);
}
.evidence-tag::before{
  content:'';
  width:6px; height:6px;
  border-radius:50%;
  background:var(--rust);
}
.on-black .evidence-tag{ color:var(--gold); }
.on-black .evidence-tag::before{ background:var(--gold); }

/* ---------- Reveal / motion ----------
   Progressive enhancement: elements are fully visible by default so
   there is never a flash-of-invisible-content for slow/no-JS visitors.
   JS opts elements into the pre-reveal (hidden) state right before it
   starts observing them, then reveals on intersection. */
.reveal, .reveal-img{ opacity:1; transform:none; }
.reveal.pre-reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity .9s var(--ease), transform .9s var(--ease);
}
.reveal-img.pre-reveal{
  opacity:0;
  transform:scale(1.04);
  transition:opacity 1.1s var(--ease), transform 1.4s var(--ease);
}
.pre-reveal.is-visible{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){
  .reveal, .reveal-img{ opacity:1 !important; transform:none !important; transition:none !important; }
}

/* ---------- Divider rule ---------- */
.rule{ height:1px; background:var(--line); border:none; margin:0; }
.on-black .rule{ background:var(--line-on-black); }

/* ---------- Utility grids ---------- */
.grid-12{ display:grid; grid-template-columns:repeat(12,1fr); gap:var(--gutter); }
@media (max-width:760px){ .grid-12{ gap:28px; } }

/* ---------- Figure caption ---------- */
figure{ margin:0; }
figcaption{
  font-family:var(--sans);
  font-size:12px;
  color:var(--ink-faint);
  letter-spacing:.03em;
  margin-top:12px;
}
.on-black figcaption{ color:var(--on-black-soft); }