/* =========================================================================
   SYNAPSE & STEEL — M. Scott personal brand
   Design system: neural intelligence (synapse) x industrial grounding (steel)
   ========================================================================= */

:root {
  /* Core palette */
  --void:        #07080a;
  --ink:         #0c0e12;
  --panel:       #11141a;
  --panel-2:     #161a22;
  --line:        #232936;
  --steel-100:   #e7ecf3;
  --steel-300:   #aab4c4;
  --steel-500:   #6b7688;
  --steel-700:   #3a4150;

  /* Accents */
  --synapse:     #43d6f5;   /* electric cyan — intelligence */
  --synapse-dim: #1c7e93;
  --forge:       #ff7a3c;   /* molten copper — steel/forge */
  --forge-dim:   #a8501f;

  /* Type */
  --font-display: "Space Grotesk", "Helvetica Neue", system-ui, sans-serif;
  --font-body:    "Inter", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  /* Rhythm */
  --maxw: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  background: var(--void);
  color: var(--steel-300);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
}

/* Film grain + vignette overlay */
body::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none; z-index: 9999;
  background:
    radial-gradient(120% 120% at 50% 0%, transparent 55%, rgba(0,0,0,0.55) 100%);
  mix-blend-mode: multiply;
}

::selection { background: var(--synapse); color: var(--void); }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--steel-100);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.02em;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--synapse);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow::before {
  content: ""; width: 28px; height: 1px;
  background: linear-gradient(90deg, var(--synapse), transparent);
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px var(--gutter);
  transition: background .4s var(--ease), padding .4s var(--ease), border-color .4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(7,8,10,0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  padding: 14px var(--gutter);
}
.brand {
  font-family: var(--font-display);
  font-weight: 700; font-size: 18px; letter-spacing: -0.02em;
  color: var(--steel-100); display: flex; align-items: center; gap: 11px;
}
.brand .mark {
  width: 26px; height: 26px; flex: none;
}
.nav-links { display: flex; gap: 34px; align-items: center; }
.nav-links a {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.04em;
  color: var(--steel-300); position: relative; padding: 4px 0;
  transition: color .3s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--synapse); transition: width .35s var(--ease);
}
.nav-links a:hover { color: var(--steel-100); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  border: 1px solid var(--line); padding: 9px 18px !important; border-radius: 999px;
  transition: border-color .3s, color .3s, background .3s;
}
.nav-cta:hover { border-color: var(--synapse); color: var(--void) !important; background: var(--synapse); }
.nav-cta::after { display: none; }
.nav-toggle { display: none; background: none; border: 0; color: var(--steel-100); cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  padding: 120px 0 80px; overflow: hidden;
}
#neural { position: absolute; inset: 0; z-index: 0; opacity: 0.9; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background:
    radial-gradient(80% 60% at 75% 30%, rgba(67,214,245,0.10), transparent 60%),
    radial-gradient(60% 50% at 15% 80%, rgba(255,122,60,0.08), transparent 60%);
}
.hero .wrap { position: relative; z-index: 2; width: 100%; }
.hero-grid {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero-copy { max-width: 640px; }
.hero h1 {
  font-size: clamp(48px, 8.5vw, 104px); margin: 22px 0 0; color: var(--steel-100);
}
.hero h1 .line { display: block; overflow: hidden; padding-bottom: 0.1em; }
.hero h1 .accent {
  background: linear-gradient(100deg, var(--synapse), #b9f3ff 60%, var(--forge));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.roles {
  margin-top: 26px; display: flex; flex-wrap: wrap; gap: 10px 0;
  font-family: var(--font-mono); font-size: 14px; color: var(--steel-300);
}
.roles span { display: inline-flex; align-items: center; }
.roles span:not(:last-child)::after {
  content: "/"; margin: 0 14px; color: var(--steel-700);
}
.hero-lede {
  margin-top: 30px; font-size: clamp(17px, 2vw, 20px); max-width: 540px;
  color: var(--steel-300);
}
.hero-lede strong { color: var(--steel-100); font-weight: 600; }
.hero-actions { margin-top: 38px; display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  font-family: var(--font-mono); font-size: 13.5px; letter-spacing: 0.04em;
  padding: 15px 26px; border-radius: 999px; cursor: pointer; border: 1px solid var(--line);
  background: transparent; color: var(--steel-100);
  display: inline-flex; align-items: center; gap: 10px;
  transition: transform .25s var(--ease), border-color .3s, background .3s, color .3s;
  will-change: transform;
}
.btn .arr { transition: transform .3s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
.btn-primary {
  background: var(--synapse); color: var(--void); border-color: var(--synapse);
  box-shadow: 0 0 0 0 rgba(67,214,245,0.5);
}
.btn-primary:hover { box-shadow: 0 12px 40px -8px rgba(67,214,245,0.55); }
.btn-ghost:hover { border-color: var(--steel-500); background: var(--panel); }

/* Hero portrait */
.hero-portrait { position: relative; justify-self: end; }
.portrait-frame {
  position: relative; width: clamp(260px, 32vw, 380px); aspect-ratio: 4/5;
  border-radius: 18px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 40px 100px -30px rgba(0,0,0,0.8);
}
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; filter: contrast(1.05) saturate(0.95); }
.portrait-frame::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(7,8,10,0.7));
  mix-blend-mode: multiply;
}
.portrait-tag {
  position: absolute; left: -18px; bottom: 26px; z-index: 3;
  background: var(--panel); border: 1px solid var(--line); border-left: 2px solid var(--synapse);
  padding: 11px 16px; border-radius: 8px; font-family: var(--font-mono); font-size: 12px;
  color: var(--steel-300); box-shadow: 0 20px 40px -20px rgba(0,0,0,0.9);
}
.portrait-tag b { color: var(--synapse); }
.portrait-corner {
  position: absolute; width: 40px; height: 40px; border: 1px solid var(--synapse); z-index: 3; opacity: .8;
}
.portrait-corner.tl { top: -6px; left: -6px; border-right: 0; border-bottom: 0; }
.portrait-corner.br { bottom: -6px; right: -6px; border-left: 0; border-top: 0; border-color: var(--forge); }

.scroll-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 3;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.3em; color: var(--steel-500);
  text-transform: uppercase; display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.scroll-hint .bar { width: 1px; height: 40px; background: linear-gradient(var(--steel-500), transparent); animation: drop 2s var(--ease) infinite; }
@keyframes drop { 0%{transform:scaleY(0);transform-origin:top} 45%{transform:scaleY(1);transform-origin:top} 55%{transform:scaleY(1);transform-origin:bottom} 100%{transform:scaleY(0);transform-origin:bottom} }

/* ---------- Section scaffolding ---------- */
section { position: relative; padding: clamp(90px, 13vh, 160px) 0; }
.section-head { max-width: 720px; margin-bottom: 64px; }
.section-head h2 { font-size: clamp(32px, 5vw, 56px); margin-top: 18px; }
.section-head p { margin-top: 20px; font-size: 18px; }
.section-num {
  position: absolute; top: clamp(40px,8vh,80px); right: var(--gutter);
  font-family: var(--font-mono); font-size: 13px; color: var(--steel-700); letter-spacing: 0.2em;
}

/* ---------- About ---------- */
#about { background: linear-gradient(180deg, var(--void), var(--ink)); }
.about-grid { display: grid; grid-template-columns: 0.82fr 1.18fr; gap: clamp(32px,5vw,72px); align-items: center; }
.about-portrait { position: relative; }
.about-frame {
  width: 100%; max-width: 380px; aspect-ratio: 4/5; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--line); box-shadow: 0 40px 90px -34px rgba(0,0,0,0.85);
}
.about-frame img { width: 100%; height: 100%; object-fit: cover; }
.about-frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 60%, rgba(7,8,10,0.55));
}
.about-content .about-lede { margin-top: 18px; }
.about-content .about-body { margin-top: 26px; }
.about-lede { font-family: var(--font-display); font-size: clamp(24px,3vw,34px); color: var(--steel-100); line-height: 1.25; letter-spacing: -0.02em; }
.about-lede .hl { color: var(--synapse); }
.about-body p { margin-bottom: 20px; }
.about-body p strong { color: var(--steel-100); }
.stat-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 40px; }
.stat { border-top: 1px solid var(--line); padding-top: 16px; }
.stat .n { font-family: var(--font-display); font-size: clamp(28px,4vw,40px); color: var(--steel-100); letter-spacing: -0.02em; }
.stat .l { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--steel-500); margin-top: 6px; }

/* ---------- Capabilities ---------- */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cap {
  position: relative; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 34px 28px 30px; overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s, background .4s;
}
.cap::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 80% at 0% 0%, rgba(67,214,245,0.07), transparent 55%);
  opacity: 0; transition: opacity .4s;
}
.cap:hover { transform: translateY(-6px); border-color: var(--steel-700); }
.cap:hover::before { opacity: 1; }
.cap .idx { font-family: var(--font-mono); font-size: 12px; color: var(--forge); letter-spacing: 0.1em; }
.cap h3 { font-size: 22px; margin: 14px 0 12px; }
.cap p { font-size: 15.5px; line-height: 1.6; }
.cap .tags { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.cap .tags span {
  font-family: var(--font-mono); font-size: 11px; color: var(--steel-300);
  border: 1px solid var(--line); padding: 5px 10px; border-radius: 999px;
}

/* ---------- Writing ---------- */
#writing { background: linear-gradient(180deg, var(--ink), var(--void)); }
.writing-head { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: 24px; margin-bottom: 56px; }
.posts { display: grid; gap: 2px; border-top: 1px solid var(--line); }
.post {
  display: grid; grid-template-columns: 120px 1fr auto; gap: 28px; align-items: baseline;
  padding: 28px 8px; border-bottom: 1px solid var(--line);
  transition: background .35s var(--ease), padding-left .35s var(--ease);
}
.post:hover { background: var(--panel); padding-left: 22px; }
.post .date { font-family: var(--font-mono); font-size: 12.5px; color: var(--steel-500); }
.post .ttl { display: block; font-family: var(--font-display); font-size: clamp(19px,2.4vw,26px); color: var(--steel-100); letter-spacing: -0.01em; line-height: 1.18; }
.post .sub { display: block; font-size: 14.5px; color: var(--steel-500); margin-top: 8px; max-width: 70ch; }
.post .go { font-family: var(--font-mono); font-size: 13px; color: var(--synapse); opacity: 0; transform: translateX(-8px); transition: all .35s var(--ease); white-space: nowrap; }
.post:hover .go { opacity: 1; transform: translateX(0); }

/* ---------- Principles / pull ---------- */
#principles { background: var(--ink); }
.principles-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.principle { background: var(--ink); padding: 40px 36px; transition: background .4s; }
.principle:hover { background: var(--panel); }
.principle .k { font-family: var(--font-mono); font-size: 12px; color: var(--synapse); letter-spacing: 0.1em; }
.principle h3 { font-size: 24px; margin: 14px 0 12px; }
.principle p { font-size: 15.5px; }

/* ---------- Contact ---------- */
#contact { background: linear-gradient(180deg, var(--ink), var(--void)); text-align: center; }
.contact-inner { max-width: 760px; margin: 0 auto; }
.contact-inner h2 { font-size: clamp(40px, 7vw, 82px); margin: 22px 0 0; }
.contact-inner h2 .accent { background: linear-gradient(100deg, var(--synapse), var(--forge)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.contact-inner p { margin: 26px auto 0; max-width: 540px; font-size: 18px; }
.contact-actions { margin-top: 44px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.socials { margin-top: 56px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.social {
  font-family: var(--font-mono); font-size: 13px; color: var(--steel-300);
  border: 1px solid var(--line); border-radius: 999px; padding: 11px 20px;
  display: inline-flex; align-items: center; gap: 9px;
  transition: border-color .3s, color .3s, transform .25s var(--ease);
}
.social:hover { border-color: var(--synapse); color: var(--steel-100); transform: translateY(-3px); }
.social .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--synapse); }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--line); padding: 40px var(--gutter);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
  font-family: var(--font-mono); font-size: 12.5px; color: var(--steel-500);
}
footer .brand { font-size: 15px; }

/* ---------- Reveal animation (progressive enhancement) ---------- */
/* Hidden state applies ONLY when JS is active, so no-JS users see everything. */
.reveal { transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal { opacity: 0; transform: translateY(28px); }
.js .reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero { min-height: auto; padding: 132px 0 84px; align-items: flex-start; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 .line { overflow: visible; }
  .hero-portrait { justify-self: start; margin-top: 8px; }
  .portrait-frame { width: min(78vw, 360px); }
  .scroll-hint { display: none; }
  .about-grid, .cap-grid, .principles-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 100%; right: 0; left: 0;
    background: rgba(7,8,10,0.97); backdrop-filter: blur(14px); padding: 24px var(--gutter); gap: 18px;
    border-bottom: 1px solid var(--line);
  }
  .nav-toggle { display: block; }
  .post { grid-template-columns: 1fr; gap: 6px; }
  .post .go { display: none; }
  .stat-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .hero h1 { font-size: clamp(38px, 13vw, 60px); }
  h1, h2, h3 { overflow-wrap: break-word; }
  .roles { font-size: 12.5px; }
  .roles span:not(:last-child)::after { margin: 0 9px; }
  .section-head h2, .contact-inner h2 { font-size: clamp(30px, 9vw, 46px); }
  .principle { padding: 30px 24px; }
  .portrait-tag { left: 0; }
  .nav.scrolled, .nav { padding-left: 20px; padding-right: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition-duration: .001s !important; }
  html { scroll-behavior: auto; }
}