/* =====================================================================
   SYNAPSE — style.css
   Light "technical plate" theme: paper ground, ink rules, one ultramarine
   accent. No gradients, no glass, no glow. Pure CSS, no frameworks.
   Sections: tokens · reset · typography · nav · hero · buttons · about ·
   skills · projects · contact · channels · footer · modal · responsive
   ===================================================================== */

/* ---------- Design tokens ---------- */
:root {
  --paper:     #EDECE7;  /* cool bone ground */
  --paper-2:   #F6F5F1;  /* raised surfaces */
  --paper-3:   #E3E2DB;  /* recessed / hover */
  --ink:       #16181C;  /* body + headings */
  --graphite:  #5E626B;  /* secondary text  (5.2:1 on paper) */
  --rule:      #CFCEC7;  /* hairlines */
  --rule-firm: #B4B3AA;  /* emphasised hairlines */
  --grid:      rgba(22, 24, 28, 0.045);

  --accent:    #1B2ED8;  /* ultramarine — 7.3:1 on paper */
  --accent-ink:#1425A8;  /* accent, pressed */
  --oxide:     #9E3B1E;  /* status only, used sparingly */

  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body:    'Newsreader', Georgia, serif;
  --font-mono:    'Martian Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1180px;

  --radius: 4px;   /* deliberately tight — pill/blob radii read as templated */
  --radius-lg: 6px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 350;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
/* Engineering-paper grid, fixed behind everything */
body::before {
  content: ''; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 34px 34px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------- Typography ---------- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700; line-height: 1.02; letter-spacing: -0.025em;
}
.eyebrow, .section-index, .core__tag, .channels__label,
.terminal__bar p, .hero__scroll, .footer, .core__stack span {
  font-family: var(--font-mono);
}
.eyebrow {
  font-size: 0.66rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent);
}

/* ---------- Layout helpers ---------- */
section {
  position: relative; z-index: 1;
  padding: clamp(5rem, 10vh, 8rem) clamp(1.25rem, 6vw, 5rem);
  max-width: var(--max); margin-inline: auto;
}
.section-head { max-width: 640px; margin-bottom: 3.5rem; }
.section-index {
  display: block; margin-bottom: 1rem; padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--rule-firm);
  font-size: 0.66rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--graphite);
}
.section-head h2 { font-size: clamp(2.1rem, 5.5vw, 3.6rem); }
.section-head p {
  color: var(--graphite); margin-top: 1rem;
  font-size: 1.1rem; line-height: 1.55; max-width: 52ch;
}
/* Flat card surface — replaces the old glassmorphism */
.glass {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
}

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0; z-index: 9997;
  background: var(--accent);
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; inset-inline: 0; z-index: 900;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 6vw, 5rem);
  transition: background 0.3s var(--ease), border-color 0.3s, padding 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(237, 236, 231, 0.88);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--rule);
  padding-block: 0.8rem;
}
.nav__brand {
  font-family: var(--font-mono); font-weight: 600; font-size: 0.8rem;
  letter-spacing: 0.16em; display: flex; align-items: center; gap: 0.6rem;
}
.nav__brand-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.nav__links { display: flex; align-items: center; gap: 2rem; }
.nav__links a {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em;
  color: var(--graphite); transition: color 0.25s;
}
.nav__links a:hover { color: var(--ink); }
.nav__cta {
  padding: 0.55rem 1rem; border: 1px solid var(--ink); border-radius: var(--radius);
  color: var(--ink) !important; transition: background 0.25s, color 0.25s;
}
.nav__cta:hover { background: var(--ink); color: var(--paper) !important; }
.nav__burger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav__burger span { width: 22px; height: 1.5px; background: var(--ink); transition: 0.3s var(--ease); }
.nav__burger.open span:first-child { transform: translateY(3.25px) rotate(45deg); }
.nav__burger.open span:last-child { transform: translateY(-3.25px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; }
.hero__content { max-width: 800px; }
.hero__title {
  font-size: clamp(2.9rem, 9.5vw, 6.4rem);
  margin: 1.1rem 0 1.6rem;
  font-weight: 800; letter-spacing: -0.04em;
}
.hero__title .line { display: block; }
.hero__title .line:last-child { color: var(--accent); }
.hero__sub {
  color: var(--graphite); font-size: clamp(1.05rem, 2vw, 1.3rem);
  max-width: 58ch; line-height: 1.55;
}
.hero__sub strong { color: var(--ink); font-weight: 500; }
.hero__sub em { font-style: italic; color: var(--ink); }
.hero__roles {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.06em;
  margin: 1.8rem 0 2.2rem; color: var(--ink); min-height: 1.5em;
}
.hero__roles .cursor-blink {
  border-right: 6px solid var(--accent);
  animation: blink 1.05s step-end infinite; padding-right: 3px;
}
@keyframes blink { 50% { border-color: transparent; } }
.hero__actions { display: flex; gap: 0.8rem; flex-wrap: wrap; }

/* Hero plate — a drafted figure, not a glowing orb */
.hero__core {
  position: absolute; right: clamp(1.25rem, 5vw, 4rem); top: 50%; translate: 0 -50%;
  width: min(38vw, 420px); pointer-events: none;
  transition: transform 0.4s var(--ease);
}
.hero__core-plate { position: relative; width: 100%; aspect-ratio: 1; }
.hero__core-ring, .hero__core-orb { position: absolute; inset: 0; border-radius: 50%; }
.hero__core-ring { border: 1px solid var(--rule-firm); }
.hero__core-ring.r1 { animation: spin 90s linear infinite; border-style: dashed; }
.hero__core-ring.r2 { inset: 13%; border-color: var(--rule-firm); }
.hero__core-ring.r3 { inset: 27%; border-color: var(--accent); opacity: 0.45; }
.hero__core-orb {
  inset: 43%; background: var(--accent); border-radius: 50%;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero__core figcaption {
  margin-top: 1.1rem; text-align: center;
  font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--graphite);
}
.hero__scroll {
  position: absolute; bottom: 2.5rem; left: clamp(1.25rem, 6vw, 5rem);
  display: flex; align-items: center; gap: 0.75rem;
  color: var(--graphite); font-size: 0.62rem; letter-spacing: 0.2em; text-transform: uppercase;
}
.hero__scroll span {
  width: 34px; height: 1px; background: var(--rule-firm); position: relative; overflow: hidden;
}
.hero__scroll span::after {
  content: ''; position: absolute; inset: 0; background: var(--accent);
  animation: sweep 2.4s var(--ease) infinite;
}
@keyframes sweep {
  0% { transform: translateX(-100%); } 60%, 100% { transform: translateX(100%); }
}

/* ---------- Buttons ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  gap: 0.55rem; min-height: 48px; padding: 0.8rem 1.5rem;
  border: 1px solid transparent; border-radius: var(--radius);
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.06em;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
              color 0.25s var(--ease), transform 0.2s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn__icon { width: 16px; height: 16px; fill: currentColor; flex-shrink: 0; }

.btn--primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn--primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); }

.btn--solid { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn--solid:hover { background: #000; border-color: #000; }

.btn--ghost { border-color: var(--ink); color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }

/* ---------- About / signal path ---------- */
.journey { position: relative; max-width: 760px; padding-left: 2.75rem; }
.journey::before {
  content: ''; position: absolute; left: 6px; top: 4px; bottom: 4px;
  width: 1px; background: var(--rule-firm);
}
.journey__node { position: relative; padding-bottom: 2.5rem; }
.journey__node:last-child { padding-bottom: 0; }
.journey__node::before {
  content: attr(data-year); position: absolute; left: -2.75rem; top: -1.5rem;
  font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.18em;
  color: var(--graphite); text-transform: uppercase;
}
.journey__dot {
  position: absolute; left: calc(-2.75rem + 2px); top: 9px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--paper); border: 1px solid var(--accent);
}
.journey__card {
  padding: 1.5rem 1.7rem;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.journey__card:hover { border-color: var(--rule-firm); background: var(--paper-3); }
.journey__card h3 { font-size: 1.35rem; margin-bottom: 0.45rem; }
.journey__card p { color: var(--graphite); font-size: 1rem; }

/* ---------- Skills ecosystem ---------- */
.skills__stage { position: relative; height: clamp(440px, 58vh, 600px); }
#skillsCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.skills__nodes { position: absolute; inset: 0; }
.skill-node {
  position: absolute; translate: -50% -50%;
  display: grid; place-items: center; text-align: center;
  padding: 0.55rem 0.9rem; border-radius: var(--radius);
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600; letter-spacing: 0.02em;
  background: var(--paper-2); border: 1px solid var(--rule-firm);
  white-space: nowrap;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease),
              color 0.25s var(--ease);
}
.skill-node small {
  display: block; color: var(--graphite); font-size: 0.55rem;
  letter-spacing: 0.14em; text-transform: uppercase; font-weight: 400; margin-top: 2px;
}
.skill-node:hover, .skill-node.active {
  border-color: var(--accent); color: var(--accent); z-index: 3;
}
.skill-node:hover small, .skill-node.active small { color: var(--accent); }
.skill-node.hub {
  background: var(--ink); color: var(--paper); border-color: var(--ink);
}
.skill-node.hub small { color: rgba(237, 236, 231, 0.65); }

/* ---------- Projects ---------- */
.projects__grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 1.25rem;
}
article.core {
  position: relative; padding: 1.6rem 1.7rem; border-radius: var(--radius-lg);
  background: var(--paper-2); border: 1px solid var(--rule);
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
article.core:hover { border-color: var(--ink); background: var(--paper-3); }
.core__tag {
  font-size: 0.6rem; font-weight: 600; letter-spacing: 0.2em;
  color: var(--accent); text-transform: uppercase;
}
.core__title { font-size: 1.35rem; margin: 0.75rem 0 0.55rem; }
.core__desc { color: var(--graphite); font-size: 1rem; }
.core__stack { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.15rem; }
.core__stack span {
  font-size: 0.58rem; letter-spacing: 0.08em; padding: 0.28rem 0.55rem;
  border-radius: 2px; border: 1px solid var(--rule); color: var(--graphite);
  background: var(--paper);
}
.core__open {
  margin-top: 1.25rem; font-family: var(--font-mono); font-size: 0.66rem;
  font-weight: 600; letter-spacing: 0.08em;
  color: var(--accent); display: inline-flex; align-items: center; gap: 0.35rem;
}

/* ---------- Contact terminal ---------- */
.terminal { max-width: 760px; overflow: hidden; background: var(--paper-2); }
.terminal__bar {
  display: flex; align-items: center; gap: 0.45rem;
  padding: 0.7rem 1rem; border-bottom: 1px solid var(--rule);
  background: var(--paper-3);
}
.terminal__bar .dot { width: 9px; height: 9px; border-radius: 50%; border: 1px solid rgba(0,0,0,0.14); }
.dot.red { background: #E0705E; } .dot.yellow { background: #E0B65E; } .dot.green { background: #7FA86B; }
.terminal__bar p {
  margin-left: auto; font-size: 0.6rem; color: var(--graphite); letter-spacing: 0.12em;
}
.terminal__body {
  padding: 1.2rem 1.3rem; font-family: var(--font-mono);
  font-size: 0.72rem; line-height: 1.85;
  min-height: 240px; max-height: 320px; overflow-y: auto;
}
.terminal__body p { margin-bottom: 0.45rem; word-break: break-word; }
.terminal__body .sys { color: var(--accent); }
.terminal__body .you { color: var(--ink); font-weight: 600; }
.terminal__body .you::before { content: '> '; color: var(--graphite); font-weight: 400; }
.terminal__body .muted { color: var(--graphite); }
.terminal__input {
  display: flex; align-items: center; gap: 0.55rem;
  padding: 0.85rem 1.3rem; border-top: 1px solid var(--rule);
}
.terminal__prompt { color: var(--accent); font-family: var(--font-mono); font-size: 0.75rem; }
.terminal__input input {
  flex: 1; background: none; border: none; color: var(--ink);
  font-family: var(--font-mono); font-size: 0.72rem;
}
.terminal__input input::placeholder { color: var(--graphite); opacity: 0.75; }

/* ---------- Contact: primary actions ---------- */
.contact__actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 2.25rem; }
.contact__actions .btn { flex: 0 1 auto; min-width: 200px; }

/* ---------- Contact: channels (code · writing · network) ---------- */
.channels {
  display: grid; gap: 1.75rem 2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  max-width: 900px; margin: 3.5rem 0 0;
}
/* These groups are <section> elements — cancel the global `section` padding/width rule */
.channels__group {
  display: flex; flex-direction: column; gap: 0.5rem;
  padding: 0; max-width: none; margin-inline: 0;
}
.channels__label {
  font-size: 0.6rem; font-weight: 600; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--graphite);
  padding-bottom: 0.6rem; margin-bottom: 0.2rem;
  border-bottom: 1px solid var(--rule-firm);
}
.channel {
  display: flex; align-items: center; gap: 0.8rem;
  min-height: 56px; padding: 0.7rem 0.9rem;
  border: 1px solid var(--rule); background: var(--paper-2);
  border-radius: var(--radius);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}
.channel:hover { background: var(--paper-3); border-color: var(--ink); }
.channel__icon { width: 20px; height: 20px; fill: var(--ink); flex-shrink: 0; }
.channel:hover .channel__icon { fill: var(--accent); }
.channel__text { display: flex; flex-direction: column; gap: 0.05rem; min-width: 0; }
.channel__name { font-family: var(--font-display); font-weight: 700; font-size: 0.95rem; line-height: 1.25; }
.channel__handle {
  font-family: var(--font-mono); font-size: 0.62rem; color: var(--graphite); line-height: 1.4;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.channel__arrow {
  width: 14px; height: 14px; margin-left: auto; flex-shrink: 0;
  fill: none; stroke: var(--graphite); stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
  transition: stroke 0.25s, transform 0.25s var(--ease);
}
.channel:hover .channel__arrow { stroke: var(--accent); transform: translate(2px, -2px); }

/* ---------- Footer ---------- */
.footer {
  position: relative; z-index: 1;
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
  padding: 2rem clamp(1.25rem, 6vw, 5rem);
  border-top: 1px solid var(--rule-firm);
  color: var(--graphite); font-size: 0.62rem; letter-spacing: 0.08em;
  max-width: var(--max); margin: 3rem auto 0;
}
.footer__status { display: flex; align-items: center; gap: 0.5rem; }
.footer__status .pulse { width: 6px; height: 6px; border-radius: 50%; background: #7FA86B; }

/* ---------- Modal ---------- */
.modal {
  position: fixed; inset: 0; z-index: 950; display: grid; place-items: center;
  padding: 1.5rem; background: rgba(22, 24, 28, 0.35);
  opacity: 0; visibility: hidden;
  /* visibility flips instantly on open, and only after the fade on close —
     otherwise focus() on the panel is a no-op while it is still hidden */
  transition: opacity 0.3s var(--ease), visibility 0s linear 0.3s;
}
.modal.open { opacity: 1; visibility: visible; transition: opacity 0.3s var(--ease), visibility 0s; }
.modal__panel {
  position: relative; width: min(620px, 100%); padding: 2.5rem;
  background: var(--paper-2); border: 1px solid var(--rule-firm); border-radius: var(--radius-lg);
  transform: translateY(12px); transition: transform 0.35s var(--ease);
  max-height: 85vh; overflow-y: auto;
}
.modal.open .modal__panel { transform: translateY(0); }
.modal__close {
  position: absolute; top: 0.75rem; right: 0.9rem;
  min-width: 44px; min-height: 44px; font-size: 1.6rem; line-height: 1;
  color: var(--graphite); transition: color 0.25s;
}
.modal__close:hover { color: var(--oxide); }
.modal__panel h3 { font-size: 1.85rem; margin-bottom: 0.5rem; }
.modal__panel .modal__tag {
  font-family: var(--font-mono); font-size: 0.6rem; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent);
}
.modal__panel p { color: var(--graphite); margin: 1rem 0; }
.modal__panel ul { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1.25rem; }
.modal__panel li {
  font-family: var(--font-mono); font-size: 0.58rem; letter-spacing: 0.08em;
  padding: 0.28rem 0.55rem; border-radius: 2px;
  border: 1px solid var(--rule); color: var(--graphite); background: var(--paper);
}
/* Sit the stack chips and the action apart, with a hairline between them */
.modal__panel ul { padding-bottom: 1.5rem; border-bottom: 1px solid var(--rule); }
.modal__panel .modal__link {
  margin-top: 1.5rem;
  display: inline-flex; /* keep it left-aligned on its own line */
}

/* Full project write-up lives in the card markup so crawlers and AI agents can
   read it; it is presented to people in the detail modal on click. */
.core__long { display: none; }

/* ---------- Reveal on scroll ----------
   Gated behind `.js` so content is visible by default: crawlers and any visitor
   whose JavaScript fails still get the full page instead of a blank one. */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero__core { opacity: 0.22; right: -6%; width: min(60vw, 460px); }
  .hero__core figcaption { display: none; }
}
@media (max-width: 760px) {
  /* the plate sits behind body copy here — keep it a faint watermark */
  .hero__core { opacity: 0.1; }
}
/* The constellation needs room; below this it overlaps and overflows,
   so it degrades to a plain wrapped list of the same nodes. */
@media (max-width: 760px) {
  .skills__stage { height: auto; }
  #skillsCanvas { display: none; }
  .skills__nodes {
    position: static; display: flex; flex-wrap: wrap; gap: 0.55rem;
  }
  .skill-node { position: static; translate: none; }
}
@media (max-width: 860px) {
  .nav__links {
    position: fixed; inset: 0 0 0 auto; width: min(300px, 80vw);
    flex-direction: column; justify-content: center; gap: 2rem;
    background: var(--paper-2); border-left: 1px solid var(--rule-firm);
    transform: translateX(100%); transition: transform 0.4s var(--ease);
  }
  .nav__links.open { transform: translateX(0); }
  .nav__burger { display: flex; z-index: 901; }
  .hero__scroll { display: none; }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .contact__actions { flex-direction: column; }
  .contact__actions .btn { width: 100%; min-width: 0; }
  .channels { grid-template-columns: 1fr; gap: 1.5rem; margin-top: 2.5rem; }
  .modal__panel { padding: 2rem 1.5rem; }
}

/* ---------- Accessibility: reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important; scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}