/* V2 FINAL — "THE SLAB" — shared core */
:root {
  --bg: #f5f1ea;
  --ink: #0a0a0a;
  --ink-soft: #1a1a1a;
  --paper: #fafaf5;
  --muted: #666;
  --dim: #999;
  --line: #0a0a0a;
  --line-soft: #ccc;
  --accent: #ff6b47;
  --display: 'Archivo Black', 'Space Grotesk', sans-serif;
  --serif: 'Space Grotesk', sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --body: 'Inter', sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { overflow-x: hidden; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  min-height: 100vh;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}
h1, h2, h3, h4 { overflow-wrap: break-word; word-break: break-word; }
a { color: inherit; }
::selection { background: var(--accent); color: #fff; }

/* Grain */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35' /%3E%3C/svg%3E");
  opacity: 0.05;
  pointer-events: none;
  z-index: 1000;
  mix-blend-mode: multiply;
}

/* Scrollbar */
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: var(--bg); }
*::-webkit-scrollbar-thumb { background: var(--ink); }

/* Top system bar */
.sysbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  background: var(--bg);
  border-bottom: 1px solid var(--ink);
  position: sticky;
  top: 0;
  z-index: 100;
}
.sysbar-l, .sysbar-r { display: flex; gap: 14px; align-items: center; }
.sysbar .sep { color: var(--dim); }
.sysbar .mark { color: var(--accent); font-size: 14px; }
.sysbar button, .sysbar a.toggle {
  background: transparent;
  border: none;
  color: var(--ink);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.2em;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.sysbar button:hover, .sysbar a.toggle:hover { border-bottom-color: var(--accent); color: var(--accent); }
.sysbar button.active { color: var(--accent); }

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 40px;
  left: 0;
  height: 2px;
  background: var(--accent);
  z-index: 98;
  transition: width 0.1s;
  width: 0;
}

/* Main nav */
.mainnav {
  display: flex;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  border-bottom: 1px solid var(--ink);
  background: var(--bg);
  position: sticky;
  top: 42px;
  z-index: 99;
}
.mainnav a {
  padding: 14px 20px;
  color: var(--ink);
  text-decoration: none;
  border-right: 1px solid var(--ink);
  transition: all 0.2s;
  display: flex; gap: 8px; align-items: center;
  position: relative;
}
.mainnav a::before {
  content: ''; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--accent); transition: width 0.3s;
}
.mainnav a:hover::before, .mainnav a.active::before { width: 100%; }
.mainnav a.active { color: var(--accent); }
.mainnav .idx { color: var(--dim); font-size: 10px; }
.mainnav .spacer { flex: 1; border: none; }
.mainnav .kb {
  padding: 14px 18px;
  color: var(--muted);
  font-size: 10px;
  cursor: pointer;
  user-select: none;
  border-left: 1px solid var(--ink);
}
.mainnav .kb:hover { color: var(--accent); }

/* Utility chips */
.chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  border: 1px solid var(--ink);
  padding: 3px 10px;
  margin: 0 4px 4px 0;
  letter-spacing: 0.05em;
}
.chip.accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.chip.dark { background: var(--ink); color: var(--bg); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 16px 26px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  font-variant-emoji: text;
}
.btn, .m-arrow, .scroll-arrow, .crumb, .meta { font-variant-emoji: text; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--ink); color: var(--accent); }
.btn-ghost { background: transparent; border: 1px solid var(--ink); color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }

/* Section primitives */
.sec { padding: 90px 32px; border-bottom: 1px solid var(--ink); }
.sec.dark { background: var(--ink); color: var(--bg); border-bottom-color: var(--bg); }
.sec.accent-bg { background: var(--accent); color: var(--ink); }

.sec-meta {
  display: flex; justify-content: space-between;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.3em; color: var(--muted);
  margin-bottom: 40px; padding-bottom: 14px;
  border-bottom: 1px solid currentColor;
}
.sec.dark .sec-meta { color: var(--dim); border-bottom-color: var(--dim); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.9s cubic-bezier(0.2, 0.7, 0.3, 1), transform 0.9s cubic-bezier(0.2, 0.7, 0.3, 1); }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }
.reveal.d5 { transition-delay: 0.4s; }

.slide-x { opacity: 0; transform: translateX(-40px); transition: all 0.9s cubic-bezier(0.2,0.7,0.3,1); }
.slide-x.in { opacity: 1; transform: translateX(0); }

/* Footer */
footer.foot {
  display: flex; justify-content: space-between;
  padding: 24px 32px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.2em; color: var(--muted);
  border-top: 1px solid var(--ink);
}

/* Keyboard help overlay */
.kb-overlay {
  position: fixed; inset: 0;
  background: rgba(10,10,10,0.94);
  z-index: 500;
  display: none;
  align-items: center; justify-content: center;
  backdrop-filter: blur(8px);
}
.kb-overlay.open { display: flex; }
.kb-box {
  border: 2px solid var(--accent);
  background: var(--bg);
  padding: 36px;
  max-width: 560px;
  font-family: var(--mono);
  font-size: 13px;
}
.kb-box h3 { font-family: var(--display); margin: 0 0 20px; font-size: 32px; letter-spacing: -0.02em; color: var(--ink); }
.kb-box h3 span { color: var(--accent); }
.kb-box .row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px dashed var(--line-soft); }
.kb-box kbd {
  background: var(--ink); color: var(--accent);
  padding: 3px 10px; font-family: var(--mono); font-size: 11px;
  margin: 0 2px;
}
.kb-box .close { margin-top: 20px; color: var(--muted); font-size: 11px; cursor: pointer; }

/* Konami overlay */
.konami-overlay {
  position: fixed; inset: 0;
  background: var(--accent);
  color: var(--ink);
  z-index: 1500;
  display: none;
  align-items: center; justify-content: center;
  flex-direction: column;
  font-family: var(--display);
  animation: konamiIn 0.5s ease-out;
}
.konami-overlay.open { display: flex; }
.konami-overlay h1 {
  font-size: clamp(80px, 16vw, 220px);
  margin: 0; font-weight: 900;
  letter-spacing: -0.05em; line-height: 0.85;
  text-align: center;
}
.konami-overlay p { font-family: var(--mono); font-size: 14px; letter-spacing: 0.3em; margin-top: 24px; }
.konami-overlay .close-hint { position: absolute; bottom: 30px; font-family: var(--mono); font-size: 10px; letter-spacing: 0.3em; }
@keyframes konamiIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }

/* Links with underline animation */
a.link {
  position: relative; text-decoration: none;
  color: var(--ink); display: inline-block;
}
a.link::after {
  content: ''; position: absolute; left: 0; bottom: -2px;
  width: 100%; height: 2px; background: currentColor;
  transform: scaleX(0); transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.2,0.7,0.3,1);
}
a.link:hover::after { transform: scaleX(1); transform-origin: left; }

/* Body mode toggles */
body.mode-rec .dev-only { display: none !important; }
body.mode-dev .rec-only { display: none !important; }

/* Page-specific: corner marks (brutalist) */
.corner-marks { position: fixed; pointer-events: none; z-index: 50; }
.corner-marks .m {
  position: fixed; width: 16px; height: 16px;
  border: 2px solid var(--accent);
}
.corner-marks .m.tl { top: 50px; left: 10px; border-right: none; border-bottom: none; }
.corner-marks .m.tr { top: 50px; right: 10px; border-left: none; border-bottom: none; }
.corner-marks .m.bl { bottom: 10px; left: 10px; border-right: none; border-top: none; }
.corner-marks .m.br { bottom: 10px; right: 10px; border-left: none; border-top: none; }

/* ============ MOBILE (≤ 720px) — global ============ */
@media (max-width: 720px) {
  .sysbar {
    padding: 10px 14px;
    font-size: 9px;
    letter-spacing: 0.12em;
    gap: 8px;
    flex-wrap: nowrap;
    min-width: 0;
  }
  .sysbar-l, .sysbar-r { gap: 8px; min-width: 0; flex-shrink: 1; }
  .sysbar-l { overflow: hidden; }
  .sysbar-l .hide-mob,
  .sysbar-l > span:nth-child(4),
  .sysbar-l > .sep:nth-child(3) { display: none; }
  .sysbar button, .sysbar a.toggle { font-size: 9px; letter-spacing: 0.12em; }
  .sysbar .mark { font-size: 12px; }

  .mainnav {
    overflow: hidden;
    width: 100%;
  }
  .mainnav::-webkit-scrollbar { display: none; }
  .mainnav a {
    flex: 1 1 0;
    min-width: 0;
    padding: 10px 4px;
    font-size: 9.5px;
    letter-spacing: 0.05em;
    gap: 4px;
    justify-content: center;
    text-align: center;
    white-space: nowrap;
  }
  .mainnav .spacer { display: none; }
  .mainnav .kb { display: none; }
  .mainnav .idx { font-size: 8.5px; }

  .scroll-progress { top: 36px; }

  .btn { padding: 12px 18px; font-size: 11px; letter-spacing: 0.15em; }

  .sec-meta { font-size: 9px; letter-spacing: 0.2em; gap: 14px; }

  footer.foot {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 18px 16px;
    font-size: 9px;
    letter-spacing: 0.15em;
  }

  .corner-marks .m { width: 12px; height: 12px; }
  .corner-marks .m.tl, .corner-marks .m.tr { top: 70px; }

  .kb-box { padding: 24px; max-width: 92vw; font-size: 11px; }
  .kb-box h3 { font-size: 22px; }

  .konami-overlay h1 { font-size: clamp(56px, 18vw, 120px); }
}

@media (max-width: 420px) {
  .sysbar { padding: 8px 10px; gap: 6px; }
  .sysbar-l > span:nth-child(2),
  .sysbar-l > .sep:nth-child(1) { display: none; }
  .sysbar-r { gap: 6px; }
  .mainnav a { padding: 9px 11px; }
}