/**
 * EUCLID — Visual Mathematics
 * Wayne Intelligence · hudsoncw.com
 * v3.0.0 — extracted from page-euclid.php inline <style>, plus Watch/Interact chrome
 */

@font-face {
  font-family: 'Chicago';
  src: url('https://cdn.jsdelivr.net/gh/nicholasgasior/ggsn-lib@master/fonts/ChicagoFLF/ChicagoFLF.woff2') format('woff2'),
       url('https://cdn.jsdelivr.net/gh/nicholasgasior/ggsn-lib@master/fonts/ChicagoFLF/ChicagoFLF.woff') format('woff');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --euclid-bg: #0a0a0f;
  --euclid-paper: #f4f0e8;
  --euclid-gold: #e8985d;
  --euclid-teal: #2a9d8f;
  --euclid-rose: #c44569;
  --euclid-red: #e63946;
  --euclid-green: #06d6a0;
  --mac-white: #ffffff;
  --mac-platinum: #cccccc;
  --mac-ltgray: #dddddd;
  --mac-midgray: #999999;
  --mac-dkgray: #666666;
  --mac-black: #000000;
  --mac-window-bg: #eeeeee;
  --mac-highlight: #000080;
  --mac-btn-face: #dddddd;
  --mac-font: 'Chicago', 'Geneva', 'Charcoal', 'Lucida Grande', sans-serif;
  --mac-stripe: repeating-linear-gradient(0deg, transparent, transparent 1px, rgba(0,0,0,0.08) 1px, rgba(0,0,0,0.08) 2px);
}

/* ── HOST THEME RESET ── */
body.euclid-body {
  background: var(--euclid-bg) !important;
  overflow-x: hidden;
  margin: 0 !important;
  padding: 0 !important;
}
.euclid-body #wrapper-navbar,
.euclid-body .site-footer,
.euclid-body #wrapper-footer,
.euclid-body #wrapper-footer-full { display: none !important; }
.euclid-body #content, .euclid-body #primary, .euclid-body #main,
.euclid-body .container, .euclid-body .container-fluid, .euclid-body .site-main,
.euclid-body .entry-content, .euclid-body .page-content, .euclid-body article.page,
.euclid-body .content-area, .euclid-body #page-wrapper, .euclid-body #wrapper-static-hero {
  width: 100% !important; max-width: 100% !important; padding: 0 !important; margin: 0 !important;
}

.euclid-page {
  position: relative;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  width: 100vw;
  min-height: 100vh;
  background: var(--euclid-bg);
  color: var(--euclid-paper);
  font-family: var(--mac-font);
}

/* ── HERO ── */
.euclid-hero {
  position: relative; width: 100%; height: 100vh; min-height: 540px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; overflow: hidden;
}
.euclid-hero canvas#euclid-hero-canvas {
  position: absolute; top: 0; left: 0; width: 100% !important; height: 100% !important; display: block;
}
.euclid-hero-title {
  position: relative; z-index: 2;
  font-family: 'Playfair Display', serif;
  font-size: clamp(4rem, 12vw, 10rem); font-weight: 900;
  letter-spacing: 0.15em; color: transparent;
  -webkit-text-stroke: 1.5px var(--euclid-gold);
  text-transform: uppercase; user-select: none;
  opacity: 0; animation: euclidReveal 2.5s ease-out 0.5s forwards;
  margin: 0; padding: 0; line-height: 1;
}
.euclid-hero-sub {
  position: relative; z-index: 2;
  font-family: var(--mac-font); font-size: clamp(0.7rem, 1.5vw, 1rem);
  letter-spacing: 0.3em; color: var(--euclid-gold);
  opacity: 0; animation: euclidReveal 2s ease-out 1.5s forwards; margin-top: 1rem;
}
@keyframes euclidReveal { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.euclid-scroll-hint {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); z-index: 2;
  font-family: var(--mac-font); font-size: 11px; letter-spacing: 0.2em;
  color: rgba(232,152,93,0.45); animation: euclidPulse 3s ease-in-out infinite;
}
@keyframes euclidPulse { 0%, 100% { opacity: 0.3; } 50% { opacity: 0.8; } }
.grid-paper-overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; opacity: 0.04;
  background-image: linear-gradient(rgba(201,168,76,0.5) 1px, transparent 1px), linear-gradient(90deg, rgba(201,168,76,0.5) 1px, transparent 1px);
  background-size: 20px 20px; z-index: 1;
}

/* ── MASTER SWITCH (hero) ── */
.euclid-master {
  position: relative; z-index: 3; margin-top: 2.25rem;
  display: inline-flex; align-items: stretch;
  border: 2px solid var(--mac-black);
  background: var(--mac-window-bg);
  box-shadow: 2px 2px 0 rgba(0,0,0,0.45), inset 1px 1px 0 var(--mac-white);
  opacity: 0; animation: euclidReveal 1.6s ease-out 2.1s forwards;
}
.euclid-master-label {
  font-family: var(--mac-font); font-size: 10px; color: var(--mac-dkgray);
  padding: 6px 10px; border-right: 1px solid var(--mac-black);
  display: flex; align-items: center; white-space: nowrap;
}
.euclid-master button {
  font-family: var(--mac-font); font-size: 11px; line-height: 1;
  padding: 6px 16px; border: 0; border-right: 1px solid var(--mac-black);
  background: var(--mac-btn-face); color: var(--mac-black); cursor: pointer;
}
.euclid-master button:last-child { border-right: 0; }
.euclid-master button:hover { background: var(--mac-platinum); }
.euclid-master button.active { background: var(--mac-black); color: var(--mac-white); }

/* ── SECTIONS ── */
.euclid-section {
  position: relative; width: 100%; min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 5rem 2rem 4rem; box-sizing: border-box; background: var(--euclid-bg);
}
.euclid-section-label {
  position: absolute; top: 1.5rem; left: 2rem;
  font-family: var(--mac-font); font-size: 10px; letter-spacing: 0.15em;
  color: var(--mac-midgray); text-transform: uppercase;
}
.euclid-section-num {
  position: absolute; top: 1rem; right: 2rem;
  font-family: var(--mac-font); font-size: 2.5rem; color: rgba(255,255,255,0.04); line-height: 1;
}
.euclid-section-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.5rem, 4vw, 2.5rem); font-weight: 700;
  color: var(--euclid-paper); margin: 0 0 0.3rem 0; text-align: center;
}
.euclid-section-quote {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(0.85rem, 1.8vw, 1.1rem); font-style: italic;
  color: rgba(244,240,232,0.3); margin: 0 0 1.5rem 0; text-align: center; max-width: 600px;
}

/* ── MAC WINDOW CHROME ── */
.mac-window {
  width: 820px; max-width: 92vw;
  background: var(--mac-window-bg);
  border: 2px solid var(--mac-black);
  box-shadow: 1px 1px 0 var(--mac-black), inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
  flex-shrink: 0;
}
.mac-title-bar {
  height: 20px; border-bottom: 2px solid var(--mac-black);
  display: flex; align-items: center; padding: 0 6px;
  user-select: none;
  background-image: var(--mac-stripe);
  background-color: var(--mac-ltgray);
}
.mac-close-box {
  width: 12px; height: 12px; border: 1px solid var(--mac-black);
  background: var(--mac-white); flex-shrink: 0; cursor: pointer; padding: 0;
}
.mac-close-box:active { background: var(--mac-black); }
.mac-title-text {
  flex: 1; text-align: center; font-family: var(--mac-font);
  font-size: 12px; color: var(--mac-black); padding: 0 20px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.mac-window-body { padding: 1px; background: var(--mac-black); }
.mac-window-body canvas { display: block; width: 100% !important; height: 100% !important; }
.mac-canvas-wrap {
  position: relative; width: 100%; height: 580px; max-height: 65vh; overflow: hidden;
}
.mac-window.is-collapsed .mac-window-body,
.mac-window.is-collapsed .mac-status-bar { display: none; }

.euclid-info {
  position: absolute; bottom: 6px; right: 8px;
  font-family: var(--mac-font); font-size: 9px; color: rgba(255,255,255,0.2);
  z-index: 2; pointer-events: none; opacity: 0; transition: opacity 0.18s linear;
}
.mac-canvas-wrap.is-interactive .euclid-info { opacity: 1; }
.mac-status-bar {
  height: 18px; border-top: 1px solid var(--mac-black);
  background: var(--mac-window-bg);
  display: flex; align-items: center; padding: 0 8px;
  box-shadow: inset 0 1px 0 var(--mac-white);
}
.mac-status-text { font-family: var(--mac-font); font-size: 9px; color: var(--mac-dkgray); }
.mac-resize-grip {
  margin-left: auto; width: 12px; height: 12px;
  background: linear-gradient(135deg,
    transparent 30%, var(--mac-midgray) 30%, var(--mac-midgray) 40%,
    transparent 40%, transparent 55%, var(--mac-midgray) 55%, var(--mac-midgray) 65%,
    transparent 65%, transparent 80%, var(--mac-midgray) 80%, var(--mac-midgray) 90%, transparent 90%);
}

/* ── WATCH / INTERACT STATE ── */
/* Watch: canvas never intercepts vertical scroll. Interact: canvas owns the gesture. */
.mac-canvas-wrap canvas { touch-action: pan-y; cursor: pointer; }
.mac-canvas-wrap.is-interactive canvas { touch-action: none; cursor: crosshair; }
.mac-canvas-wrap.is-interactive { box-shadow: inset 0 0 0 2px var(--euclid-gold); }

.euclid-hint {
  position: absolute; left: 8px; bottom: 6px; z-index: 3;
  display: flex; align-items: center; gap: 6px;
  font-family: var(--mac-font); font-size: 9px; letter-spacing: 0.06em;
  color: var(--mac-black); background: var(--mac-ltgray);
  border: 1px solid var(--mac-black);
  box-shadow: 1px 1px 0 rgba(0,0,0,0.4);
  padding: 3px 7px; pointer-events: none; user-select: none;
}
.euclid-hint::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--euclid-teal); box-shadow: 0 0 0 1px var(--mac-black);
  animation: euclidBlink 2.4s ease-in-out infinite;
}
@keyframes euclidBlink { 0%,100% { opacity: 1; } 50% { opacity: 0.25; } }
.mac-canvas-wrap.is-interactive .euclid-hint { display: none; }

.euclid-release {
  position: absolute; left: 8px; bottom: 6px; z-index: 3; display: none;
  font-family: var(--mac-font); font-size: 10px; line-height: 1;
  padding: 4px 10px; height: 22px;
  background: var(--mac-btn-face); color: var(--mac-black);
  border: 2px solid var(--mac-black); border-radius: 4px;
  box-shadow: inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
  cursor: pointer;
}
.mac-canvas-wrap.is-interactive .euclid-release { display: block; }
.euclid-release:active { background: var(--mac-black); color: var(--mac-white); }

/* ── MAC BUTTONS ── */
.euclid-controls { display: flex; gap: 6px; margin-top: 12px; flex-wrap: wrap; justify-content: center; align-items: center; }
.euclid-btn {
  font-family: var(--mac-font); font-size: 11px;
  padding: 3px 14px; height: 22px;
  background: var(--mac-btn-face); color: var(--mac-black);
  border: 2px solid var(--mac-black); border-radius: 4px;
  box-shadow: inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
  cursor: pointer; outline: none; line-height: 1;
}
.euclid-btn:hover { background: var(--mac-platinum); }
.euclid-btn:active, .euclid-btn.active {
  background: var(--mac-black); color: var(--mac-white);
  box-shadow: inset 1px 1px 0 var(--mac-dkgray), inset -1px -1px 0 var(--mac-black);
}
.euclid-btn:focus-visible, .euclid-eli5-btn:focus-visible,
.euclid-release:focus-visible, .euclid-master button:focus-visible {
  outline: 2px solid var(--euclid-gold); outline-offset: 2px;
}

/* ── MAC SLIDER ── */
.euclid-slider-group { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.euclid-slider-group label {
  font-family: var(--mac-font); font-size: 10px; color: var(--mac-midgray); min-width: 70px; text-align: right;
}
.euclid-slider {
  -webkit-appearance: none; appearance: none;
  width: 180px; height: 16px;
  background: var(--mac-ltgray); border: 2px solid var(--mac-black);
  border-radius: 0; outline: none;
  box-shadow: inset 1px 1px 0 var(--mac-midgray), inset -1px -1px 0 var(--mac-white);
}
.euclid-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 14px; background: var(--mac-btn-face);
  border: 1px solid var(--mac-black); border-radius: 0; cursor: pointer;
  box-shadow: inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
}
.euclid-slider::-moz-range-thumb {
  width: 16px; height: 14px; background: var(--mac-btn-face);
  border: 1px solid var(--mac-black); border-radius: 0; cursor: pointer;
  box-shadow: inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
}

/* ── ZOOM BUTTONS (mobile) ── */
.euclid-zoom-btns { display: none; gap: 4px; margin-top: 8px; }
.euclid-zoom-btn {
  font-family: var(--mac-font); font-size: 13px; width: 32px; height: 26px;
  background: var(--mac-btn-face); color: var(--mac-black);
  border: 2px solid var(--mac-black); border-radius: 4px;
  box-shadow: inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
  cursor: pointer; display: flex; align-items: center; justify-content: center; outline: none;
}
.euclid-zoom-btn:active { background: var(--mac-black); color: var(--mac-white); }
@media (max-width: 768px) { .euclid-zoom-btns { display: flex; } }

/* ── ELI5 — Mac Dialog ── */
.euclid-eli5-wrap { position: relative; display: inline-block; }
.euclid-eli5-btn {
  font-family: var(--mac-font); font-size: 11px;
  padding: 3px 12px; height: 22px;
  background: var(--mac-btn-face); color: var(--mac-black);
  border: 2px solid var(--mac-black); border-radius: 4px;
  box-shadow: inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray), 0 0 0 2px var(--mac-black);
  cursor: pointer; outline: none; line-height: 1;
}
.euclid-eli5-btn::after { content: ' \25BE'; font-size: 8px; }
.euclid-eli5-btn:hover { background: var(--mac-platinum); }
.euclid-eli5-panel {
  display: none; position: absolute; bottom: calc(100% + 10px); left: 50%; transform: translateX(-50%);
  width: 440px; max-width: 90vw; max-height: 70vh; overflow-y: auto;
  background: var(--mac-window-bg); border: 2px solid var(--mac-black);
  box-shadow: 4px 4px 0 rgba(0,0,0,0.3), inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
  padding: 0; z-index: 100;
}
.euclid-eli5-panel.open { display: block; animation: eli5SlideUp 0.15s ease-out; }
@keyframes eli5SlideUp { from { opacity: 0; transform: translateX(-50%) translateY(6px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
.euclid-eli5-panel::before {
  content: ''; display: block; height: 18px;
  background-image: var(--mac-stripe);
  background-color: var(--mac-ltgray);
  border-bottom: 1px solid var(--mac-black);
}
.eli5-inner { padding: 12px 16px; }
.euclid-eli5-tabs { display: flex; gap: 0; margin-bottom: 10px; border-bottom: 1px solid var(--mac-black); }
.euclid-eli5-tab {
  font-family: var(--mac-font); font-size: 11px; padding: 4px 14px;
  background: var(--mac-ltgray); border: 1px solid var(--mac-black);
  border-bottom: none; border-radius: 3px 3px 0 0;
  color: var(--mac-black); cursor: pointer; margin-bottom: -1px; outline: none;
}
.euclid-eli5-tab.active { background: var(--mac-window-bg); border-bottom: 1px solid var(--mac-window-bg); font-weight: bold; }
.euclid-eli5-content { display: none; }
.euclid-eli5-content.active { display: block; }
.euclid-eli5-content h4 { font-family: var(--mac-font); font-size: 13px; color: var(--mac-black); margin: 0 0 6px 0; font-weight: bold; }
.euclid-eli5-content p { font-family: 'Cormorant Garamond', serif; font-size: 14px; line-height: 1.6; color: var(--mac-black); margin: 0 0 8px 0; }
.euclid-eli5-content .eli5-example {
  font-family: var(--mac-font); font-size: 10px; color: var(--mac-black);
  padding: 6px 8px; background: var(--mac-white);
  border: 1px solid var(--mac-black); box-shadow: inset 1px 1px 0 var(--mac-midgray);
  margin: 8px 0; line-height: 1.5;
}

/* ── MP3 PLAYER (Mac desk accessory) ── */
.euclid-audio-player {
  position: fixed; bottom: 12px; right: 12px; z-index: 999;
  background: var(--mac-window-bg); border: 2px solid var(--mac-black);
  box-shadow: 2px 2px 0 rgba(0,0,0,0.3), inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
  padding: 0; min-width: 160px;
}
.euclid-audio-player.is-hidden { display: none; }
.mac-audio-title-bar {
  height: 16px;
  background-image: var(--mac-stripe);
  background-color: var(--mac-ltgray);
  border-bottom: 1px solid var(--mac-black);
  display: flex; align-items: center; padding: 0 4px;
}
.mac-audio-title-bar .mac-close-box { width: 10px; height: 10px; }
.mac-audio-title-text { flex: 1; text-align: center; font-family: var(--mac-font); font-size: 10px; color: var(--mac-black); }
.mac-audio-controls { display: flex; align-items: center; gap: 6px; padding: 6px 8px; }
.euclid-audio-play-btn {
  width: 22px; height: 22px; border: 2px solid var(--mac-black); border-radius: 3px;
  background: var(--mac-btn-face);
  box-shadow: inset 1px 1px 0 var(--mac-white), inset -1px -1px 0 var(--mac-midgray);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  outline: none; padding: 0; flex-shrink: 0;
}
.euclid-audio-play-btn:active { background: var(--mac-black); box-shadow: inset 1px 1px 0 #333; }
.euclid-audio-play-btn:active svg { fill: var(--mac-white); }
.euclid-audio-play-btn svg { width: 8px; height: 8px; fill: var(--mac-black); }
.euclid-audio-progress {
  flex: 1; height: 10px; background: var(--mac-white);
  border: 1px solid var(--mac-black); box-shadow: inset 1px 1px 0 var(--mac-midgray);
  position: relative; cursor: pointer; min-width: 60px;
}
.euclid-audio-progress-fill { height: 100%; background: var(--mac-black); width: 0%; }

.euclid-audio-reopen {
  position: fixed; bottom: 12px; right: 12px; z-index: 999; display: none;
  font-family: var(--mac-font); font-size: 12px; width: 28px; height: 24px;
  background: var(--mac-btn-face); color: var(--mac-black);
  border: 2px solid var(--mac-black); cursor: pointer;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.3), inset 1px 1px 0 var(--mac-white);
}
.euclid-audio-reopen.is-visible { display: block; }

/* ── FOOTER ── */
.euclid-footer { padding: 3rem 2rem; text-align: center; border-top: 1px solid rgba(255,255,255,0.05); }
.euclid-footer-nav { display: flex; gap: 2rem; justify-content: center; flex-wrap: wrap; }
.euclid-footer-nav a {
  font-family: var(--mac-font); font-size: 11px; color: var(--mac-midgray);
  text-decoration: none; transition: color 0.15s;
}
.euclid-footer-nav a:hover { color: var(--mac-white); }
.euclid-colophon { margin-top: 1.5rem; font-family: 'Cormorant Garamond', serif; font-size: 0.75rem; font-style: italic; color: rgba(244,240,232,0.12); }

/* ── MOBILE ── */
@media (max-width: 768px) {
  /* No more full-viewport scroll traps. */
  .euclid-section { min-height: 0; padding: 3rem 0.7rem 2.5rem; }
  .mac-canvas-wrap { height: 62vw; max-height: 46vh; min-height: 260px; }
  .euclid-section-label { top: 1rem; left: 0.9rem; }
  .euclid-section-num { top: 0.6rem; right: 0.9rem; font-size: 1.8rem; }
  .euclid-controls { gap: 4px; }
  .euclid-btn { font-size: 10px; padding: 4px 10px; height: 26px; }
  .euclid-eli5-btn { height: 26px; }
  .euclid-eli5-panel { width: 92vw; }
  .euclid-audio-player { bottom: 6px; right: 6px; }
  .mac-window { max-width: 97vw; }
  .euclid-master { margin-top: 1.6rem; }
  .euclid-master-label { display: none; }
  .euclid-slider { width: 46vw; }
}

@media (prefers-reduced-motion: reduce) {
  .euclid-hero-title, .euclid-hero-sub, .euclid-master { animation: none; opacity: 1; }
  .euclid-scroll-hint, .euclid-hint::before { animation: none; }
  .euclid-eli5-panel.open { animation: none; }
}