/* ============================================================
   JJ TURNER — Personal site
   Design system: "Complex systems made clear."
   ============================================================ */

:root{
  /* surfaces — warm near-black charcoal */
  --bg:        #141210;
  --bg-2:      #19150F;
  --panel:     #1D1813;
  --panel-2:   #221C16;
  --graphite:  #2A241D;

  /* ink — warm off-white -> soft metallic gray */
  --ink:       #F3EEE4;
  --ink-2:     #C9C1B2;
  --ink-dim:   #9A9183;
  --ink-faint: #6C6457;

  /* hairlines */
  --line:   rgba(243,238,228,0.085);
  --line-2: rgba(243,238,228,0.16);

  /* signal — shirt blue */
  --signal:      #3E9BDC;
  --signal-deep: #2C7CB8;
  --signal-12:   rgba(62,155,220,0.12);
  --signal-20:   rgba(62,155,220,0.20);
  --signal-40:   rgba(62,155,220,0.40);
  --signal-glow: rgba(62,155,220,0.55);

  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body:    'Hanken Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SFMono-Regular', monospace;

  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 88px);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){ html{ scroll-behavior: auto; } }

body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
::selection{ background: var(--signal-40); color: #fff; }

/* ---- type primitives ---- */
.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before{
  content:"";
  width: 22px; height: 1px;
  background: var(--signal);
  flex: none;
}
.eyebrow.no-rule::before{ display:none; }

.mono{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.04;
  margin: 0;
  text-wrap: balance;
}

.display{
  font-size: clamp(2.5rem, 6.4vw, 5.4rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 0.98;
}
.section-title{
  font-size: clamp(1.9rem, 3.8vw, 3.1rem);
  letter-spacing: -0.028em;
}

.lede{
  font-size: clamp(1.05rem, 1.5vw, 1.28rem);
  line-height: 1.55;
  color: var(--ink-2);
  text-wrap: pretty;
}

.amber{ color: var(--signal); }

/* ---- layout ---- */
.wrap{ width:100%; max-width: var(--maxw); margin:0 auto; padding-inline: var(--gutter); }

section{ position: relative; }
.section-pad{ padding-block: clamp(72px, 12vh, 152px); }

.rule{ height:1px; background: var(--line); border:0; margin:0; }

/* index label used on section headers */
.sec-index{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
}

/* ---- buttons ---- */
.btn{
  --c: var(--ink);
  display:inline-flex; align-items:center; gap:10px;
  font-family: var(--font-body);
  font-size: 15px; font-weight: 600;
  letter-spacing: -0.005em;
  padding: 14px 22px;
  border: 1px solid var(--line-2);
  border-radius: 2px;
  color: var(--c);
  background: transparent;
  cursor: pointer;
  transition: background .35s var(--ease), border-color .35s var(--ease), color .35s var(--ease), transform .35s var(--ease);
  white-space: nowrap;
}
.btn .arrow{ transition: transform .35s var(--ease); }
.btn:hover .arrow{ transform: translateX(3px); }
.btn:focus-visible{ outline: 2px solid var(--signal); outline-offset: 3px; }

.btn--signal{
  background: var(--signal);
  border-color: var(--signal);
  color: #fff;
  font-weight: 600;
}
.btn--signal:hover{ background: #57ABE6; border-color:#57ABE6; transform: translateY(-1px); }

.btn--ghost:hover{ border-color: var(--line-2); background: rgba(243,238,228,0.04); }

/* small play glyph for youtube */
.play-dot{
  width: 18px; height:18px; border-radius:50%;
  border:1px solid currentColor;
  display:inline-grid; place-items:center; flex:none;
}
.play-dot::after{ content:""; border-left: 5px solid currentColor; border-top:3px solid transparent; border-bottom:3px solid transparent; margin-left:1px; }

/* ---- scroll-reveal ---- */
.reveal{ opacity:0; transform: translateY(18px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in{ opacity:1; transform: none; }
.reveal[data-d="1"]{ transition-delay:.08s; }
.reveal[data-d="2"]{ transition-delay:.16s; }
.reveal[data-d="3"]{ transition-delay:.24s; }
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1 !important; transform:none !important; transition:none !important; }
}

/* focus baseline */
a:focus-visible, button:focus-visible, input:focus-visible{
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 2px;
}