/* =============================================================
   margin practice — shared design system
   ============================================================= */

:root{
  --ink:        #0D0D0D;
  --dim:        #2A2A2A;
  --warm-white: #F4F3EF;
  --warm-soft:  #ECEAE3;
  --amber:      #E0A500;
  --amber-hot:  #F2B500;
  --oxblood:    #7A2E2E;
  --oxblood-deep:#5E2222;
  --pit-green:  #1F3A34;
  --grey:       #6A6A6A;
  --grey-d:     #4A4A4A;
  --border:     #E0DDD8;
  --border-ink: #1F1F1F;

  --f-display:  "Bricolage Grotesque", serif;
  --f-italic:   "Newsreader", Georgia, serif;
  --f-body:     "DM Sans", system-ui, sans-serif;
  --f-mono:     "DM Mono", ui-monospace, monospace;
  --f-mark:     "Syne", sans-serif;

  --maxw: 1480px;
  --gutter: clamp(20px, 4vw, 64px);
  --rule: 1px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; overflow-x:clip; }
body{
  font-family: var(--f-body);
  font-weight: 300;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--warm-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
button{font:inherit; color:inherit; border:0; background:transparent; cursor:pointer; padding:0}
::selection{ background: var(--amber); color: var(--ink); }

/* ---------- cursor follower ---------- */
#cursor{
  position: fixed;
  top: 0; left: 0;
  width: 0; height: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0;
  transition: opacity .2s linear;
  will-change: transform;
}
@media (hover: none){ #cursor{ display: none; } }
.cursor__dot{
  position: absolute;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(224,165,0,.16);
  transition: opacity .18s ease, transform .18s ease;
}
.cursor__mark{
  position: absolute;
  top: -10px; left: 1px;
  width: 2px; height: 22px;
  background: var(--amber);
  opacity: 0;
  transform: scaleY(.4);
  transform-origin: center;
  transition: opacity .14s ease, transform .18s cubic-bezier(.4,1.6,.5,1);
}
#cursor.hover .cursor__dot{ opacity: 0; transform: scale(.4); }
#cursor.hover .cursor__mark{ opacity: 1; transform: scaleY(1); }

/* ---------- type primitives ---------- */
.mono{ font-family: var(--f-mono); font-weight:400; letter-spacing:0.02em; }
.mono-up{ font-family: var(--f-mono); font-weight:500; text-transform:uppercase; letter-spacing:0.08em; font-size: 12px; }
.italic{ font-family: var(--f-italic); font-style: italic; font-weight: 400; }
.display{
  font-family: var(--f-display);
  font-weight: 800;
  font-variation-settings: "opsz" 96;
  letter-spacing: -0.025em;
  line-height: 0.92;
  text-wrap: balance;
}
.h2{
  font-family: var(--f-display);
  font-weight: 700;
  font-variation-settings: "opsz" 72;
  letter-spacing: -0.022em;
  line-height: 0.96;
  font-size: clamp(40px, 6.4vw, 96px);
  text-wrap: balance;
}
.h3{
  font-family: var(--f-display);
  font-weight: 700;
  font-variation-settings: "opsz" 48;
  letter-spacing: -0.02em;
  line-height: 1.02;
  font-size: clamp(24px, 2.4vw, 34px);
}
.lede{
  font-family: var(--f-body);
  font-weight: 300;
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.55;
  max-width: 56ch;
}
p{ text-wrap: pretty; }

/* ---------- sections ---------- */
.section{
  padding: clamp(72px, 9vw, 140px) var(--gutter);
  position: relative;
}
.section.ink{ background: var(--ink); color: var(--warm-white); }
.section.warm{ background: var(--warm-white); color: var(--ink); }
.section.oxblood{ background: var(--oxblood); color: var(--warm-white); }
.section.pit{ background: var(--pit-green); color: var(--warm-white); }
.wrap{ max-width: var(--maxw); margin: 0 auto; width: 100%; }
.section-label{
  font-family: var(--f-mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  display: flex; align-items: center; gap: 14px;
  margin-bottom: clamp(28px, 3vw, 56px);
}
.section-label .num{ color: var(--oxblood); }
.section-label .num.amber{ color: var(--amber); }
.section.ink .section-label .num{ color: var(--oxblood); filter: brightness(1.35); }
.section.oxblood .section-label .num,
.section.pit .section-label .num{ color: var(--amber); }
.section-label .bar{ display:inline-block; width:32px; height:1px; background: currentColor; opacity:.5; }

/* =============================================================
   BANNER
   ============================================================= */
.banner{
  background: var(--amber);
  color: var(--ink);
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
}
.banner__inner{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px var(--gutter);
  display: flex; align-items: center; gap: 18px;
}
.banner__msg{ flex:1; min-width:0; }
.banner__msg b{ font-weight: 500; }
.banner__cta{
  font-family: var(--f-mono);
  font-weight: 500;
  border: 1px solid var(--ink);
  padding: 4px 10px;
  white-space: nowrap;
  transition: background .12s linear, color .12s linear;
}
.banner__cta:hover{ background: var(--ink); color: var(--amber); }
.banner__close{
  font-family: var(--f-mono);
  width: 22px; height: 22px;
  display: grid; place-items: center;
  border: 1px solid var(--ink);
  font-size: 12px;
}
.banner.dismissed{ display:none; }

/* =============================================================
   TOPBAR
   ============================================================= */
.topbar{
  position: sticky; top: 0; z-index: 50;
  background: var(--warm-white);
  border-bottom: 1px solid var(--border);
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.topbar.on-ink{
  background: var(--ink);
  border-bottom-color: var(--border-ink);
  color: var(--warm-white);
}
.topbar__inner{
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 16px var(--gutter);
}
.nav{
  display: flex; gap: clamp(18px, 2.6vw, 36px); justify-content:flex-end;
  font-family: var(--f-body);
  font-weight: 400; font-size: 14px;
}
.nav a{ position: relative; padding: 4px 0; }
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px;
  height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: left;
  transition: transform .22s cubic-bezier(.6,.05,.2,1);
}
.nav a:hover::after{ transform: scaleX(1); }
.nav a[aria-current="page"]::after{ transform: scaleX(1); }
.nav .talk{ color: var(--amber); }
.topbar.on-ink .nav .talk{ color: var(--amber); }

.clock{
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--grey);
  display: inline-flex; align-items:center; gap:8px;
}
.clock::before{
  content:""; width:6px; height:6px; border-radius:50%;
  background: var(--amber); box-shadow: 0 0 0 3px rgba(224,165,0,.18);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{ 50%{ box-shadow: 0 0 0 6px rgba(224,165,0,0);} }

/* ---------- wordmark ---------- */
.wordmark{
  display: inline-flex; align-items: baseline; gap: 0;
  line-height: 1;
}
.wordmark .m{
  font-family: var(--f-mark);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: currentColor;
}
.wordmark .rule{
  width: 2px; height: 18px;
  background: var(--amber);
  margin: 0 10px;
  align-self: center;
  transform: translateY(1px);
}
.wordmark .p{
  font-family: var(--f-italic);
  font-style: italic;
  font-weight: 400;
  font-size: 22px;
  color: currentColor;
  line-height: 1;
}
.wordmark.lg .m,.wordmark.lg .p{ font-size: 30px; }
.wordmark.lg .rule{ height: 24px; }

/* =============================================================
   BUTTONS
   ============================================================= */
.btn{
  font-family: var(--f-body);
  font-weight: 500;
  font-size: 15px;
  display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 22px;
  border: 1px solid transparent;
  transition: background .14s linear, color .14s linear, border-color .14s linear;
  position: relative;
}
.btn .arrow{ display:inline-block; transition: transform .22s cubic-bezier(.6,.05,.2,1); }
.btn:hover .arrow{ transform: translateX(6px); }
.btn-primary{ background: var(--amber); color: var(--ink); }
.btn-primary:hover{ background: var(--ink); color: var(--amber); }
.section.ink .btn-primary:hover{ background: var(--warm-white); color: var(--ink); }
.btn-ghost{ background: transparent; color: currentColor; border: 1px solid currentColor; }
.section.ink .btn-ghost{ border-color: var(--warm-white); }
.btn-ghost:hover{ background: currentColor; }
.btn-ghost:hover *{ color: var(--ink); }

/* =============================================================
   FOOTER
   ============================================================= */
.footer{
  background: var(--ink);
  color: var(--warm-white);
  padding: clamp(60px, 6vw, 96px) var(--gutter) 40px;
  border-top: 1px solid var(--border-ink);
}
.footer__top{
  max-width: var(--maxw); margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: clamp(28px, 3vw, 56px);
  padding-bottom: clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--border-ink);
}
.footer .wordmark{ margin-bottom: 24px; }
.footer__tag{
  font-family: var(--f-italic);
  font-style: italic;
  color: rgba(244,243,239,.55);
  font-size: 16px;
  max-width: 28ch;
}
.footer h5{
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  font-weight: 500;
  margin: 0 0 18px;
}
.footer ul{ list-style: none; padding: 0; margin: 0; display:grid; gap: 8px; }
.footer ul a{
  font-family: var(--f-body);
  font-size: 14.5px;
  color: var(--warm-white);
  position: relative;
}
.footer ul a::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px;
  height:1px; background: currentColor;
  transform: scaleX(0); transform-origin: left;
  transition: transform .22s cubic-bezier(.6,.05,.2,1);
}
.footer ul a:hover::after{ transform: scaleX(1); }

.colophon{
  max-width: var(--maxw); margin: 0 auto;
  padding-top: 28px;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 12px 32px;
  font-family: var(--f-mono);
  font-size: 12px;
  color: rgba(244,243,239,.45);
  letter-spacing: 0.04em;
}
.colophon dt{ color: rgba(244,243,239,.4); text-transform: uppercase; letter-spacing: 0.14em; }
.colophon dd{ margin: 0; color: rgba(244,243,239,.7); max-width: 90ch; }
.colophon .v{ color: var(--warm-white); }

/* =============================================================
   MOBILE NAV TOGGLE
   ============================================================= */
.nav-toggle{
  display: none;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: currentColor;
  padding: 6px 2px;
  z-index: 51;
}
.nav-toggle__lines{
  position: relative;
  display: inline-block;
  width: 22px; height: 12px;
}
.nav-toggle__lines i{
  position: absolute; left: 0; right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform .24s cubic-bezier(.6,.05,.2,1), top .24s cubic-bezier(.6,.05,.2,1), opacity .15s ease;
}
.nav-toggle__lines i:nth-child(1){ top: 2px; }
.nav-toggle__lines i:nth-child(2){ top: 8px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines i{ background: var(--amber); }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines i:nth-child(1){ top: 5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines i:nth-child(2){ top: 5px; transform: rotate(-45deg); }
.nav-toggle__label{ display: inline-block; min-width: 4ch; }

/* =============================================================
   REVEAL ON SCROLL
   ============================================================= */
[data-reveal]{
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1);
}
[data-reveal].in{ opacity: 1; transform: none; }
[data-reveal-delay="1"]{ transition-delay: .08s; }
[data-reveal-delay="2"]{ transition-delay: .16s; }
[data-reveal-delay="3"]{ transition-delay: .24s; }
[data-reveal-delay="4"]{ transition-delay: .32s; }

/* =============================================================
   FOCUS + REDUCED MOTION
   ============================================================= */
:focus-visible{ outline: 2px solid var(--amber); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal]{ opacity:1; transform: none; }
}

/* =============================================================
   RESPONSIVE
   ============================================================= */
/* nav overlay header — hidden on desktop, shown inside overlay on mobile */
.nav__header{ display: none; }

@media (max-width: 980px){
  .topbar__inner{ grid-template-columns: 1fr auto; gap: 16px; }
  .clock{ display: none; }
  .nav-toggle{ display: inline-flex; }

  /* Full-screen overlay — owns its own header + close button */
  .nav{
    position: fixed;
    top: 0; right: 0; bottom: 0; left: 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: 0;
    padding: 0 0 32px;
    background: var(--warm-white);
    color: var(--ink);
    font-size: clamp(28px, 7vw, 44px);
    font-family: var(--f-display);
    font-weight: 400;
    letter-spacing: -0.02em;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: transform .28s cubic-bezier(.6,.05,.2,1),
                opacity .22s ease,
                visibility 0s linear .28s;
    z-index: 200;
    overflow-y: auto;
  }
  .topbar.on-ink .nav{
    background: var(--ink);
    color: var(--warm-white);
  }

  /* Header injected by JS at top of overlay */
  .nav__header{
    display: flex;
    position: sticky;
    top: 0;
    z-index: 1;
    align-items: center;
    justify-content: space-between;
    padding: 16px var(--gutter);
    background: inherit;
    border-bottom: 1px solid var(--border);
    margin-bottom: clamp(16px, 5vw, 32px);
    flex-shrink: 0;
  }
  .topbar.on-ink .nav .nav__header{ border-bottom-color: var(--border-ink); }
  .nav__close{
    font-family: var(--f-mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--amber);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .nav a{
    padding: 18px var(--gutter);
    border-bottom: 1px solid var(--border);
    display: flex; align-items: baseline; justify-content: space-between;
  }
  .topbar.on-ink .nav a{ border-bottom-color: var(--border-ink); }
  .nav a::after{ display: none; }
  .nav a::before{
    content: attr(data-num);
    font-family: var(--f-mono);
    font-size: 11px;
    font-weight: 500;
    color: var(--grey);
    letter-spacing: 0.06em;
    margin-right: 16px;
  }
  .topbar.on-ink .nav a::before{ color: rgba(244,243,239,.45); }
  .nav .talk{ color: var(--amber); }

  body.nav-open{ overflow: hidden; }
  body.nav-open .nav{
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
    transition: transform .28s cubic-bezier(.6,.05,.2,1),
                opacity .22s ease,
                visibility 0s linear 0s;
  }

  .footer__top{ grid-template-columns: 1fr 1fr; }
  .colophon{ grid-template-columns: 1fr; gap: 6px; }
}

@media (max-width: 640px){
  .banner__inner{ flex-direction: column; align-items: flex-start; gap: 10px; padding: 12px var(--gutter); }
  .banner__cta{ align-self: stretch; text-align:center; }
  .footer__top{ grid-template-columns: 1fr; }
}