/* ================================================================
   CLAUDE TORINO — DESIGN SYSTEM v2.0
   Dark/Light themable. Shared across all pages.
   ================================================================ */

:root {
  /* Brand constants (don't change with theme) */
  --ct-accent:       #c74a2a;
  --ct-accent-deep:  #8f3319;
  --ct-accent-glow:  #e56a47;

  /* LIGHT theme (default) */
  --ct-ink:          #1a1613;
  --ct-ink-soft:     #4a3f36;
  --ct-bg:           #efe9e0;
  --ct-bg-deep:      #e4dccf;
  --ct-paper:        #f7f2e9;
  --ct-rule:         rgba(26, 22, 19, 0.14);
  --ct-rule-strong:  rgba(26, 22, 19, 0.35);

  /* Surface inversions (use on dark blocks within a light theme) */
  --ct-inv-bg:       #1a1613;
  --ct-inv-text:     #f7f2e9;
  --ct-inv-muted:    rgba(247, 242, 233, 0.75);
  --ct-inv-subtle:   rgba(247, 242, 233, 0.5);
  --ct-inv-rule:     rgba(247, 242, 233, 0.15);

  /* Fonts */
  --ct-font-display: 'Fraunces', Georgia, serif;
  --ct-font-mono:    'JetBrains Mono', 'Consolas', monospace;

  /* Space */
  --ct-space-xs:  0.25rem;
  --ct-space-sm:  0.5rem;
  --ct-space-md:  1rem;
  --ct-space-lg:  1.5rem;
  --ct-space-xl:  2.5rem;
  --ct-space-2xl: 4rem;
  --ct-space-3xl: 6rem;
  --ct-space-4xl: 9rem;

  --ct-grain-opacity: 0.04;
  --ct-grid-opacity: 0.03;
}

/* DARK theme — swap surface tokens, keep accent */
html[data-theme="dark"] {
  --ct-ink:          #f5efe4;
  --ct-ink-soft:     #c9bfae;
  --ct-bg:           #131110;
  --ct-bg-deep:      #1c1815;
  --ct-paper:        #1f1a16;
  --ct-rule:         rgba(245, 239, 228, 0.14);
  --ct-rule-strong:  rgba(245, 239, 228, 0.35);

  --ct-inv-bg:       #f7f2e9;
  --ct-inv-text:     #1a1613;
  --ct-inv-muted:    rgba(26, 22, 19, 0.75);
  --ct-inv-subtle:   rgba(26, 22, 19, 0.5);
  --ct-inv-rule:     rgba(26, 22, 19, 0.15);

  --ct-grain-opacity: 0.06;
  --ct-grid-opacity: 0.05;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--ct-bg);
  color: var(--ct-ink);
  font-family: var(--ct-font-display);
  font-size: 18px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background 0.5s cubic-bezier(.2,.7,.2,1), color 0.5s cubic-bezier(.2,.7,.2,1);
}

/* Grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='2' seed='5'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.4 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: var(--ct-grain-opacity);
  pointer-events: none;
  z-index: 1000;
  mix-blend-mode: multiply;
}
html[data-theme="dark"] body::before { mix-blend-mode: screen; }

/* Dot-grid background — sitewide, subtle */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, currentColor 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ct-ink);
  opacity: var(--ct-grid-opacity);
  pointer-events: none;
  z-index: 0;
}

::selection { background: var(--ct-accent); color: var(--ct-paper); }

/* ============ TYPOGRAPHY ============ */
.ct-display {
  font-family: var(--ct-font-display);
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 300;
  line-height: 0.88;
  letter-spacing: -0.035em;
  font-variation-settings: 'opsz' 144;
}
.ct-section {
  font-family: var(--ct-font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.02em;
}
.ct-lead {
  font-family: var(--ct-font-display);
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 300;
  line-height: 1.35;
}
.ct-body {
  font-family: var(--ct-font-display);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.55;
  color: var(--ct-ink-soft);
}
.ct-mono {
  font-family: var(--ct-font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.ct-display em, .ct-section em, .ct-lead em, .ct-italic-accent {
  font-style: italic;
  font-weight: 400;
  color: var(--ct-accent);
}

/* ============ LAYOUT ============ */
.ct-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--ct-space-xl);
  position: relative;
  z-index: 1;
}
.ct-section-pad { padding: var(--ct-space-4xl) 0; position: relative; z-index: 1; }

.ct-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--ct-space-xl); }
.ct-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--ct-space-xl); }
.ct-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--ct-space-lg); }

@media (max-width: 900px) {
  .ct-grid-2, .ct-grid-3, .ct-grid-4 { grid-template-columns: 1fr; }
  .ct-container { padding: 0 var(--ct-space-lg); }
  .ct-section-pad { padding: var(--ct-space-3xl) 0; }
}

/* ============ SKIP LINK (a11y) ============ */
.skip-link {
  position: absolute;
  left: 0; top: 0;
  transform: translateY(-120%);
  background: var(--ct-ink);
  color: var(--ct-bg);
  padding: 0.6rem 1rem;
  font-family: var(--ct-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  z-index: 200;
  transition: transform 0.2s ease;
}
.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--ct-accent);
  outline-offset: 2px;
}

/* ============ NAV ============ */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.1rem var(--ct-space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--ct-space-md);
  background: color-mix(in oklab, var(--ct-bg) 70%, transparent);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s ease, background 0.4s ease;
}
.site-nav.is-scrolled {
  border-bottom-color: var(--ct-rule);
  background: color-mix(in oklab, var(--ct-bg) 92%, transparent);
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--ct-font-display);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  color: var(--ct-ink);
}
.site-logo-dot {
  width: 8px; height: 8px;
  background: var(--ct-accent);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 0 0 var(--ct-accent);
  animation: logo-pulse 3s ease-in-out infinite;
}
@keyframes logo-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(199,74,42,0.4); }
  50% { box-shadow: 0 0 0 6px rgba(199,74,42,0); }
}

.site-nav-links {
  display: flex;
  gap: var(--ct-space-xl);
  font-family: var(--ct-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.site-nav-links a {
  color: var(--ct-ink);
  text-decoration: none;
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.3s ease;
}
.site-nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--ct-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(.2,.7,.2,1);
}
.site-nav-links a:hover,
.site-nav-links a.is-active { color: var(--ct-accent); }
.site-nav-links a:hover::after,
.site-nav-links a.is-active::after { transform: scaleX(1); }

.nav-right { display: flex; gap: 0.8rem; align-items: center; }

.theme-toggle {
  width: 38px; height: 38px;
  border: 1px solid var(--ct-rule);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ct-ink);
  transition: border-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
  border-radius: 50%;
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover { border-color: var(--ct-accent); color: var(--ct-accent); transform: rotate(30deg); }
.theme-toggle svg { width: 16px; height: 16px; transition: transform 0.5s cubic-bezier(.2,.7,.2,1); }
.theme-toggle .sun { display: none; }
.theme-toggle .moon { display: block; }
html[data-theme="dark"] .theme-toggle .sun { display: block; }
html[data-theme="dark"] .theme-toggle .moon { display: none; }

.nav-cta {
  font-family: var(--ct-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ct-bg);
  background: var(--ct-ink);
  padding: 0.7rem 1rem;
  text-decoration: none;
  transition: background 0.3s ease, color 0.3s ease;
  border: 1px solid var(--ct-ink);
}
.nav-cta:hover { background: var(--ct-accent); border-color: var(--ct-accent); color: #fff; }

.nav-mobile-btn { display: none; }

@media (max-width: 900px) {
  .site-nav { padding: 0.9rem var(--ct-space-lg); }
  .site-nav-links { display: none; }
}

/* ============ BUTTONS ============ */
.ct-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1.6rem;
  background: var(--ct-ink);
  color: var(--ct-bg);
  text-decoration: none;
  font-family: var(--ct-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--ct-ink);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease, gap 0.3s ease, border-color 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.ct-btn span { position: relative; z-index: 1; }
.ct-btn:hover {
  background: var(--ct-accent);
  border-color: var(--ct-accent);
  color: #fff;
  transform: translateY(-2px);
  gap: 1rem;
}
.ct-btn--ghost {
  background: transparent;
  color: var(--ct-ink);
}
.ct-btn--ghost:hover {
  background: var(--ct-ink);
  color: var(--ct-bg);
  border-color: var(--ct-ink);
}
.ct-btn--accent {
  background: var(--ct-accent);
  border-color: var(--ct-accent);
  color: #fff;
}
.ct-btn--accent:hover {
  background: var(--ct-ink);
  border-color: var(--ct-ink);
  color: var(--ct-bg);
}

/* ============ REVEAL ============ */
.ct-reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1);
}
.ct-reveal.is-visible { opacity: 1; transform: translateY(0); }

.ct-reveal-line {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
  line-height: inherit;
}
.ct-reveal-line > span {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 1s cubic-bezier(.2,.7,.2,1);
  transition-delay: var(--d, 0ms);
}
.is-visible .ct-reveal-line > span,
.ct-reveal-line.is-visible > span { transform: translateY(0); }

/* ============ MARQUEE ============ */
.ct-marquee {
  overflow: hidden;
  padding: var(--ct-space-md) 0;
  border-top: 1px solid var(--ct-rule);
  border-bottom: 1px solid var(--ct-rule);
  background: var(--ct-bg-deep);
  position: relative;
  z-index: 1;
}
.ct-marquee-track {
  display: flex;
  gap: var(--ct-space-xl);
  animation: ct-scroll var(--ct-marquee-dur, 40s) linear infinite;
  white-space: nowrap;
  width: max-content;
}
.ct-marquee-track.reverse { animation-direction: reverse; }
.ct-marquee:hover .ct-marquee-track { animation-play-state: paused; }
.ct-marquee-item {
  font-family: var(--ct-font-display);
  font-style: italic;
  font-size: 1.4rem;
  color: var(--ct-ink);
  font-weight: 300;
  opacity: 0.85;
  transition: color 0.3s ease, opacity 0.3s ease;
}
.ct-marquee-item:hover { color: var(--ct-accent); opacity: 1; }
.ct-marquee-item::before {
  content: '\2736';
  color: var(--ct-accent);
  font-style: normal;
  margin-right: var(--ct-space-xl);
  font-size: 0.8rem;
  vertical-align: middle;
}
@keyframes ct-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============ SECTION HEADER ============ */
.section-header {
  display: grid;
  grid-template-columns: 1fr 2.4fr;
  gap: var(--ct-space-xl);
  align-items: start;
  margin-bottom: var(--ct-space-2xl);
  padding-top: var(--ct-space-md);
  border-top: 2px solid currentColor;
}
.section-header-label {
  font-family: var(--ct-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height: 1.7;
}
.section-header-label .num {
  color: var(--ct-accent);
  margin-right: 0.6rem;
}
.section-header-title {
  font-family: var(--ct-font-display);
  font-weight: 300;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  line-height: 0.95;
  letter-spacing: -0.022em;
  font-variation-settings: 'opsz' 144;
}
.section-header-title em { font-style: italic; font-weight: 400; color: var(--ct-accent); }
@media (max-width: 768px) {
  .section-header { grid-template-columns: 1fr; gap: var(--ct-space-md); }
}

/* ============ FOOTER ============ */
.site-footer {
  background: #0f0d0b;
  color: #f7f2e9;
  padding: var(--ct-space-3xl) var(--ct-space-xl) var(--ct-space-xl);
  position: relative;
  z-index: 1;
}
html[data-theme="dark"] .site-footer { background: #080706; }

.footer-big {
  font-family: var(--ct-font-display);
  font-weight: 300;
  font-size: clamp(4rem, 18vw, 17rem);
  line-height: 0.84;
  letter-spacing: -0.055em;
  font-variation-settings: 'opsz' 144;
  max-width: 1360px;
  margin: 0 auto var(--ct-space-2xl);
}
.footer-big em { font-style: italic; font-weight: 400; color: var(--ct-accent); }
.footer-grid {
  max-width: 1360px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--ct-space-xl);
  padding-top: var(--ct-space-xl);
  border-top: 1px solid rgba(247,242,233,0.15);
}
.footer-col h5 {
  font-family: var(--ct-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(247,242,233,0.5);
  margin-bottom: var(--ct-space-md);
  font-weight: 400;
}
.footer-col ul { list-style: none; }
.footer-col li {
  padding: 0.3rem 0;
  font-family: var(--ct-font-display);
  font-weight: 400;
  font-size: 1rem;
}
.footer-col a {
  color: #f7f2e9;
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
  display: inline-block;
}
.footer-col a:hover { color: var(--ct-accent); padding-left: 0.5rem; }
.footer-about {
  max-width: 36ch;
  color: rgba(247,242,233,0.7);
  font-family: var(--ct-font-display);
  font-size: 1rem;
  line-height: 1.55;
}
.footer-about em { color: var(--ct-accent); font-style: italic; }
.footer-disclaimer {
  max-width: 1360px;
  margin: var(--ct-space-2xl) auto 0;
  padding: var(--ct-space-lg);
  border: 1px dashed rgba(247,242,233,0.25);
  font-family: var(--ct-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  line-height: 1.75;
  color: rgba(247,242,233,0.65);
  text-transform: none;
}
.footer-disclaimer strong {
  color: var(--ct-accent);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.62rem;
  display: block;
  margin-bottom: 0.6rem;
}
.footer-legal {
  max-width: 1360px;
  margin: var(--ct-space-2xl) auto 0;
  padding-top: var(--ct-space-md);
  border-top: 1px solid rgba(247,242,233,0.15);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--ct-space-md);
  font-family: var(--ct-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(247,242,233,0.5);
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }

/* ============ CURSOR ============ */
.ct-cursor {
  position: fixed;
  top: 0; left: 0;
  width: 12px; height: 12px;
  border: 1px solid var(--ct-accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transition: width 0.3s cubic-bezier(.2,.7,.2,1), height 0.3s cubic-bezier(.2,.7,.2,1), background 0.3s ease;
  transform: translate(-50%, -50%);
  mix-blend-mode: difference;
  display: none;
}
.ct-cursor.grow { width: 52px; height: 52px; }
@media (hover: hover) and (pointer: fine) {
  .ct-cursor { display: block; }
}

/* ============ SCROLL PROGRESS ============ */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: var(--ct-accent);
  z-index: 200;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.08s linear;
}

/* ============ PAGE HEADER (for sub-pages) ============ */
.page-header {
  padding: 11rem var(--ct-space-xl) var(--ct-space-3xl);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--ct-rule);
}
.page-header-inner {
  max-width: 1360px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}
.page-header-crumb {
  font-family: var(--ct-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ct-ink-soft);
  margin-bottom: var(--ct-space-lg);
  display: flex;
  gap: 0.7rem;
  align-items: center;
}
.page-header-crumb a { color: var(--ct-ink-soft); text-decoration: none; transition: color 0.3s ease; }
.page-header-crumb a:hover { color: var(--ct-accent); }
.page-header-crumb .sep { color: var(--ct-accent); }

.page-title {
  font-family: var(--ct-font-display);
  font-weight: 300;
  font-size: clamp(3rem, 9vw, 8rem);
  line-height: 0.88;
  letter-spacing: -0.04em;
  font-variation-settings: 'opsz' 144;
  margin-bottom: var(--ct-space-xl);
}
.page-title em { font-style: italic; font-weight: 400; color: var(--ct-accent); }

.page-sub {
  font-family: var(--ct-font-display);
  font-weight: 300;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  line-height: 1.4;
  max-width: 56ch;
  color: var(--ct-ink-soft);
}
.page-sub em { font-style: italic; color: var(--ct-accent); }

.page-header-meta {
  margin-top: var(--ct-space-2xl);
  padding-top: var(--ct-space-md);
  border-top: 1px solid var(--ct-rule);
  display: flex;
  gap: var(--ct-space-2xl);
  flex-wrap: wrap;
  font-family: var(--ct-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ct-ink-soft);
}
.page-header-meta strong {
  display: block;
  font-family: var(--ct-font-display);
  font-weight: 400;
  font-size: 1.15rem;
  color: var(--ct-ink);
  text-transform: none;
  letter-spacing: -0.01em;
  margin-top: 0.3rem;
}