/* ==========================================================================
   xophersean.com — System mode
   Loaded site-wide. Every token and structural class here is namespaced
   (--sys-*, .sys-*) so nothing in this file can collide with tokens.css /
   base.css. Two layers:
   1. :root[data-mode="system"] overrides — re-theme the SAME content that's
      already on every page (About/Projects/Services/Writing/footer/nav) via
      the shared component classes (.btn, .tag, .card, .page, etc). No page
      has separate System-mode content; this is a reskin, not a rewrite.
   2. .mode-system / .sys-* — the homepage hero's bespoke bonus content
      (editable headline, reticle, status readout, facets). This is the one
      place with genuinely separate content per mode, and it's intentionally
      not reproduced anywhere else on the site.
   ========================================================================== */

:root {
  --sys-paper:               #F3F4F7;
  --sys-ink:                 #12151A;
  --sys-ink-muted:           #4E5561;
  --sys-ink-faint:           #8891A0;
  --sys-ink-hairline:        rgba(18,21,26,0.13);
  --sys-ink-hairline-strong: rgba(18,21,26,0.22);

  /* Grimoire — locked accent pair, 2026-07-15 */
  --sys-signal:      #3F7D20;
  --sys-signal-dim:  #2F5E18;
  --sys-signal-glow: rgba(63,125,32,0.30);
  --sys-signal-tint: rgba(63,125,32,0.07);
  --sys-arcane:      #5B21B6;
  --sys-arcane-dim:  #451A8A;
  --sys-arcane-glow: rgba(91,33,182,0.32);
  --sys-arcane-tint: rgba(91,33,182,0.07);

  --sys-status-active:   var(--sys-arcane);
  --sys-status-building: var(--sys-signal);

  --sys-font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --sys-font-body: 'IBM Plex Sans', -apple-system, 'Segoe UI', sans-serif;
  --sys-radius: 3px;
  --sys-surface-raised: #EAECEF;
}

/* ─────────────────────── nav chrome override ─────────────────────── */
:root[data-mode="system"] .nav {
  background: var(--sys-paper);
  border-bottom-color: var(--sys-ink-hairline);
  transition: background .3s ease, border-color .3s ease;
}
:root[data-mode="system"] .nav-wordmark {
  font-family: var(--sys-font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sys-ink);
}
:root[data-mode="system"] .nav-links {
  font-family: var(--sys-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sys-ink-muted);
}
:root[data-mode="system"] .nav-links a.active {
  color: var(--sys-ink);
  border-bottom-color: var(--sys-signal);
}
:root[data-mode="system"] .nav-links.open {
  background: var(--sys-surface-raised);
  border-bottom-color: var(--sys-ink-hairline);
}
:root[data-mode="system"] .nav-toggle span {
  background: var(--sys-ink);
}

/* ─────────────────────── sitewide reskin (same content, re-themed) ───────────────────────
   Mapping, consistent everywhere: teal-family (primary/action) -> signal green,
   gold-family (secondary/meta/link) -> arcane violet. */

:root[data-mode="system"] body {
  background: var(--sys-paper);
  color: var(--sys-ink);
  font-family: var(--sys-font-body);
}
:root[data-mode="system"] h1,
:root[data-mode="system"] h2,
:root[data-mode="system"] h3 {
  font-family: var(--sys-font-mono);
  color: var(--sys-ink);
}
:root[data-mode="system"] p {
  font-family: var(--sys-font-body);
  color: var(--sys-ink-muted);
}
:root[data-mode="system"] .eyebrow,
:root[data-mode="system"] .label,
:root[data-mode="system"] .meta-date {
  font-family: var(--sys-font-mono);
  color: var(--sys-ink-faint);
}

:root[data-mode="system"] .btn {
  font-family: var(--sys-font-body);
}
:root[data-mode="system"] .btn-primary {
  background: var(--sys-signal);
}
:root[data-mode="system"] .btn-primary:hover {
  background: var(--sys-signal-dim);
}
:root[data-mode="system"] .btn-secondary {
  border-color: var(--sys-ink);
  color: var(--sys-ink);
}
:root[data-mode="system"] .btn-secondary:hover {
  background: var(--sys-surface-raised);
}
:root[data-mode="system"] .btn-ghost {
  color: var(--sys-ink-muted);
}

:root[data-mode="system"] .tag {
  font-family: var(--sys-font-mono);
}
:root[data-mode="system"] .tag-solid-teal {
  background: var(--sys-signal);
}
:root[data-mode="system"] .tag-solid-gold {
  background: var(--sys-arcane);
}
:root[data-mode="system"] .tag-outline {
  border-color: var(--sys-ink-hairline-strong);
  color: var(--sys-ink-faint);
}

:root[data-mode="system"] .cards-row {
  border-top-color: var(--sys-ink-hairline);
}
:root[data-mode="system"] .card {
  border-right-color: var(--sys-ink-hairline);
}
:root[data-mode="system"] .card h3 {
  font-family: var(--sys-font-mono);
}
:root[data-mode="system"] .card p {
  font-family: var(--sys-font-body);
}
@media (max-width: 640px) {
  :root[data-mode="system"] .card {
    border-top-color: var(--sys-ink-hairline);
  }
}

:root[data-mode="system"] .featured-strip {
  background: var(--sys-surface-raised);
}
:root[data-mode="system"] .featured-strip .dot {
  background: var(--sys-signal);
}
:root[data-mode="system"] .featured-strip .title {
  font-family: var(--sys-font-mono);
  color: var(--sys-ink);
}
:root[data-mode="system"] .featured-strip .rule-fill {
  background: var(--sys-ink-hairline);
}
:root[data-mode="system"] .featured-strip .visit-link {
  color: var(--sys-arcane-dim);
}

:root[data-mode="system"] .experience-row {
  border-top-color: var(--sys-ink-hairline);
}
:root[data-mode="system"] .experience-row .title {
  font-family: var(--sys-font-mono);
}
:root[data-mode="system"] .experience-row .company {
  color: var(--sys-arcane-dim);
}
:root[data-mode="system"] .experience-row .dates {
  font-family: var(--sys-font-mono);
  color: var(--sys-ink-faint);
}
:root[data-mode="system"] .experience-row ul {
  color: var(--sys-ink-muted);
}

:root[data-mode="system"] .page h2 {
  color: var(--sys-ink-faint);
  border-top-color: var(--sys-ink-hairline);
}
:root[data-mode="system"] .page h3 {
  font-family: var(--sys-font-mono);
}
:root[data-mode="system"] .page ul,
:root[data-mode="system"] .page ol {
  color: var(--sys-ink-muted);
}
:root[data-mode="system"] .page em {
  font-family: var(--sys-font-mono);
  color: var(--sys-ink-faint);
}
:root[data-mode="system"] .page hr {
  border-top-color: var(--sys-ink-hairline);
}
:root[data-mode="system"] .page p a,
:root[data-mode="system"] .page li a {
  color: var(--sys-arcane-dim);
}
/* Same specificity fix as base.css — button-styled anchors keep button appearance. */
:root[data-mode="system"] .page p a.btn-primary,
:root[data-mode="system"] .page li a.btn-primary { color: var(--bg); text-decoration: none; }
:root[data-mode="system"] .page p a.btn-secondary,
:root[data-mode="system"] .page li a.btn-secondary { color: var(--sys-ink); text-decoration: none; }
:root[data-mode="system"] .service-icon-badge {
  background: var(--sys-arcane-tint);
}
:root[data-mode="system"] .service-icon-badge svg {
  color: var(--sys-arcane-dim);
}

:root[data-mode="system"] .footer {
  font-family: var(--sys-font-mono);
  color: var(--sys-ink-faint);
  border-top-color: var(--sys-ink-hairline);
}
:root[data-mode="system"] .footer-links a {
  color: var(--sys-ink-faint);
}
:root[data-mode="system"] .footer-links a:hover {
  color: var(--sys-ink);
}

:root[data-mode="system"] .card:hover {
  background: var(--sys-surface-raised);
}
:root[data-mode="system"] .page h3.service-heading svg {
  color: var(--sys-arcane-dim);
}
:root[data-mode="system"] .featured-strip .dot,
:root[data-mode="system"] .featured-strip .dot::after {
  background: var(--sys-signal);
}

/* ─────────────────────── mode toggle switch ─────────────────────── */
.mode-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  padding: 4px 0 4px 12px;
  margin-left: 12px;
  border-left: 1px solid var(--rule);
  cursor: pointer;
}
.mt-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.mode-toggle[aria-pressed="true"] .mt-label.off { color: var(--ink-faint); }
.mode-toggle[aria-pressed="true"] .mt-label.on { color: var(--sys-signal-dim); }
.mode-toggle[aria-pressed="false"] .mt-label.off { color: var(--ink); }
.mt-track {
  position: relative;
  width: 34px; height: 18px;
  border-radius: 999px;
  background: var(--rule);
  transition: background .18s ease;
}
.mode-toggle[aria-pressed="true"] .mt-track { background: var(--sys-signal); }
.mt-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0,0,0,.25);
  transition: transform .18s ease;
}
.mode-toggle[aria-pressed="true"] .mt-thumb { transform: translateX(16px); }

@media (max-width: 640px) {
  .mode-toggle { margin-left: 0; padding-left: 0; border-left: none; }
}

/* ─────────────────────── boot-flash transition ─────────────────────── */
.boot-flash {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(180deg, transparent 0%, var(--sys-ink) 50%, transparent 100%);
  mix-blend-mode: difference;
}
.boot-flash.playing { animation: sys-bootsweep .5s ease-in-out; }
@keyframes sys-bootsweep {
  0%   { opacity: 0;   transform: translateY(-100%); }
  35%  { opacity: .55; }
  65%  { opacity: .55; }
  100% { opacity: 0;   transform: translateY(100%); }
}
@media (prefers-reduced-motion: reduce) {
  .boot-flash.playing { animation: none; }
}

/* ─────────────────────── System hero ─────────────────────── */
.mode-system {
  position: relative;
  overflow: hidden;
  background-image:
    linear-gradient(var(--sys-ink-hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--sys-ink-hairline) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: center -1px;
  background-color: var(--sys-paper);
  -webkit-mask-image: linear-gradient(to bottom, black 0%, black 85%, transparent 100%);
          mask-image: linear-gradient(to bottom, black 0%, black 85%, transparent 100%);
}

.sys-facets { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.sys-facets .facet { position: absolute; background: var(--sys-ink); }
.sys-facets .f1 { width: 62%; height: 78%; top: -10%; left: -12%; opacity: .035;
      clip-path: polygon(0 0, 40% 4%, 30% 52%, 6% 70%, 0 46%); }
.sys-facets .f2 { width: 58%; height: 64%; top: -6%; right: -10%; opacity: .05; background: var(--sys-arcane);
      clip-path: polygon(100% 0, 100% 58%, 58% 42%, 74% 6%); }
.sys-facets .f3 { width: 46%; height: 50%; bottom: -12%; left: 4%; opacity: .04;
      clip-path: polygon(8% 100%, 44% 58%, 72% 100%, 30% 92%); }
.sys-facets .f4 { width: 40%; height: 54%; bottom: -14%; right: -4%; opacity: .05; background: var(--sys-signal);
      clip-path: polygon(58% 100%, 100% 56%, 100% 100%, 74% 88%); }
.sys-facets .f5 { width: 30%; height: 34%; top: 22%; left: 34%; opacity: .028;
      clip-path: polygon(22% 18%, 56% 6%, 48% 50%, 10% 42%); }
.sys-facets .f6 { width: 22%; height: 26%; top: 8%; left: 54%; opacity: .035; background: var(--sys-arcane);
      clip-path: polygon(0 30%, 60% 0, 100% 40%, 46% 100%); }

.sys-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(56px, 10vw, 112px) var(--space-6) clamp(64px, 9vw, 96px);
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(0, 340px);
  gap: 32px;
  align-items: start;
}
.sys-hero-copy { max-width: 640px; }

.sys-eyebrow {
  font-family: var(--sys-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sys-ink-faint);
  margin: 0 0 22px;
}
.sys-eyebrow::before { content: '// '; color: var(--sys-ink-hairline-strong); }

.sys-mark {
  position: relative;
  font-family: var(--sys-font-mono);
  font-weight: 700;
  font-size: clamp(34px, 5.8vw, 68px);
  line-height: 0.98;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0 0 8px;
  color: var(--sys-ink);
  outline: none;
  cursor: text;
}
.sys-mark::after {
  content: '';
  display: inline-block;
  width: 0.1em;
  height: 0.82em;
  background: var(--sys-signal);
  margin-left: 0.08em;
  vertical-align: -0.06em;
  animation: sys-blink 1.1s steps(1) infinite;
}
.sys-mark:focus::after { display: none; }
@keyframes sys-blink { 50% { opacity: 0; } }

.sys-edit-hint {
  display: block;
  font-family: var(--sys-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sys-ink-faint);
  margin: 0 0 26px;
  opacity: .8;
  transition: opacity .3s ease;
}
.sys-edit-hint::before { content: '// '; }
.mode-system.touched .sys-edit-hint { opacity: 0; height: 0; margin: 0 0 20px; pointer-events: none; }

.sys-tagline {
  font-family: var(--sys-font-body);
  font-weight: 400;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.6;
  color: var(--sys-ink-muted);
  margin: 0 0 34px;
  max-width: 46ch;
}

.sys-status {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-family: var(--sys-font-mono);
  font-size: 13.5px;
  margin: 0 0 38px;
  max-width: 420px;
}
.sys-status-row { display: flex; align-items: baseline; gap: 8px; }
.sys-status-row .k { color: var(--sys-ink-muted); white-space: nowrap; }
.sys-status-row .k::before { content: '> '; color: var(--sys-ink-hairline-strong); }
.sys-status-row .fill {
  flex: 1 1 auto;
  border-bottom: 1px dotted var(--sys-ink-hairline-strong);
  height: 0;
  transform: translateY(-4px);
}
.sys-status-row .v { font-weight: 500; letter-spacing: 0.04em; white-space: nowrap; }
.sys-status-row .v.active { color: var(--sys-status-active); }
.sys-status-row .v.building { color: var(--sys-status-building); }
.sys-status-row .v::before { content: '●'; font-size: 8px; margin-right: 6px; vertical-align: 2px; }

.sys-hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.sys-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sys-font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 13px 22px;
  border-radius: var(--sys-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, transform .1s;
}
.sys-btn:active { transform: translateY(1px); }
.sys-btn-primary { background: var(--sys-signal); border-color: var(--sys-signal); color: #fff; }
.sys-btn-primary:hover { background: var(--sys-signal-dim); border-color: var(--sys-signal-dim); }
.sys-btn-ghost { background: transparent; border-color: var(--sys-ink-hairline-strong); color: var(--sys-ink); }
.sys-btn-ghost:hover { border-color: var(--sys-ink); background: rgba(18,21,26,0.03); }

/* reticle */
.sys-reticle-wrap {
  position: relative;
  justify-self: end;
  width: clamp(160px, 20vw, 300px);
  aspect-ratio: 1;
  margin-top: clamp(4px, 1vw, 18px);
}
.sys-reticle-wrap svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 10px var(--sys-arcane-glow));
  transition: transform .25s ease-out;
}
.sys-ring-outer { animation: sys-spin 26s linear infinite; transform-origin: 100px 100px; }
.sys-ring-tick  { animation: sys-spin 60s linear infinite reverse; transform-origin: 100px 100px; }
@keyframes sys-spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  .sys-ring-outer, .sys-ring-tick, .sys-mark::after { animation: none !important; }
}

@media (max-width: 780px) {
  .sys-hero-inner { grid-template-columns: 1fr; }
  .sys-reticle-wrap { justify-self: start; width: 150px; opacity: .8; }
}