/* Reset, typography, layout primitives, header, footer, buttons */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Paper grain for warmth */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button, input, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
  font-variation-settings: "opsz" 144, "SOFT" 50;
}
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); line-height: 1.15; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

em, .serif-italic { font-family: var(--font-display); font-style: italic; font-weight: 300; }

.skip-link {
  position: absolute; left: var(--space-sm); top: -100px; z-index: 200;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem; border-radius: var(--radius-sm);
}
.skip-link:focus { top: var(--space-sm); }

[hidden] { display: none !important; }

.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

:focus-visible { outline: 2px solid var(--gold-deep); outline-offset: 3px; border-radius: 4px; }

.container { width: min(var(--max), 100% - 2 * var(--gutter)); margin-inline: auto; }
.section { padding-block: var(--space-section); position: relative; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--crimson);
}
.eyebrow::before { content: ""; width: 28px; height: 1.5px; background: currentColor; }
.night .eyebrow { color: var(--gold-light); }

.lede { font-size: var(--text-lg); color: var(--ink-soft); max-width: 60ch; }
.gold-text {
  background: linear-gradient(100deg, var(--gold-deep), var(--gold-light) 50%, var(--gold));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* Dark interlude sections */
.night { background: var(--night); color: var(--on-night); }
.night .lede, .night p { color: var(--on-night-soft); }

/* Buttons */
.btn {
  --btn-bg: var(--crimson);
  --btn-fg: #fff;
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  padding: 0.95rem 1.6rem; min-height: 48px;
  border: 0; border-radius: var(--radius-pill);
  background: var(--btn-bg); color: var(--btn-fg);
  font-weight: 700; font-size: var(--text-sm); letter-spacing: 0.01em; text-decoration: none;
  cursor: pointer;
  transition: transform var(--duration-normal) var(--ease-out-expo), box-shadow var(--duration-normal) var(--ease-out-expo);
}
.btn::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(110deg, var(--crimson-deep), var(--gold-deep));
  transform: translateX(-101%); transition: transform 500ms var(--ease-out-expo);
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lift); }
.btn:hover::after { transform: translateX(0); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn .arrow { transition: transform var(--duration-normal) var(--ease-out-expo); }
.btn:hover .arrow { transform: translateX(4px); }

.btn--gold { --btn-bg: var(--gold-light); --btn-fg: var(--night); }
.btn--gold::after { background: linear-gradient(110deg, var(--gold-light), #f5dca6); }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line-strong); }
.btn--ghost::after { background: var(--paper-2); }
.night .btn--ghost { --btn-fg: var(--on-night); box-shadow: inset 0 0 0 1.5px var(--line-night); }
.night .btn--ghost::after { background: var(--night-2); }

/* Header */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50;
  padding-block: 0.9rem;
  transition: background var(--duration-normal), box-shadow var(--duration-normal), padding var(--duration-normal);
}
.site-header.is-scrolled {
  background: rgba(251, 246, 238, 0.82);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  box-shadow: 0 1px 0 var(--line);
  padding-block: 0.55rem;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); }

.brand { display: inline-flex; align-items: center; gap: 0.7rem; text-decoration: none; }
.brand img { width: 46px; height: 46px; }
.brand-name { font-family: var(--font-display); font-size: 1.15rem; line-height: 1; letter-spacing: -0.01em; white-space: nowrap; }
.nav-links a, .nav-cta { white-space: nowrap; }
.brand-name small { display: block; font-family: var(--font-body); font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold-deep); margin-top: 4px; font-weight: 700; }

.nav { display: flex; align-items: center; gap: var(--space-md); }
.nav-links { display: flex; gap: 0.25rem; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  position: relative; display: block; padding: 0.5rem 0.85rem;
  text-decoration: none; font-weight: 600; font-size: var(--text-sm); color: var(--ink-soft);
  transition: color var(--duration-fast);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0.85rem; right: 0.85rem; bottom: 0.25rem; height: 1.5px;
  background: var(--crimson); transform: scaleX(0); transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { transform: scaleX(1); }
.nav-links a[data-tool] { color: var(--crimson); }

.menu-toggle {
  display: none; width: 48px; height: 48px; border: 0; border-radius: 50%;
  background: var(--paper-2); cursor: pointer; position: relative;
}
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
  position: absolute; left: 50%; width: 20px; height: 1.5px; background: var(--ink);
  transition: transform var(--duration-normal) var(--ease-out-expo), opacity var(--duration-fast);
}
.menu-toggle span { top: 50%; transform: translate(-50%, -50%); }
.menu-toggle span::before, .menu-toggle span::after { content: ""; transform: translateX(-50%); }
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }
.menu-open .menu-toggle span { background: transparent; }
.menu-open .menu-toggle span::before { transform: translateX(-50%) translateY(6px) rotate(45deg); }
.menu-open .menu-toggle span::after { transform: translateX(-50%) translateY(-6px) rotate(-45deg); }

@media (max-width: 480px) {
  .site-header .brand-name small { display: none; }
  .brand-name { font-size: 1.02rem; white-space: nowrap; }
}
@media (max-width: 360px) {
  .brand-name { font-size: 0.92rem; }
  .brand { gap: 0.5rem; }
  .brand img { width: 40px; height: 40px; }
}

@media (max-width: 1140px) {
  .menu-toggle { display: block; z-index: 60; }
  .nav-cta { display: none; }
  .nav-links {
    position: fixed; inset: 0; z-index: 55;
    flex-direction: column; justify-content: center; align-items: flex-start; gap: 0.25rem;
    padding: var(--gutter);
    background: var(--paper);
    clip-path: circle(0% at calc(100% - 40px) 40px);
    transition: clip-path 650ms var(--ease-out-expo);
  }
  .nav-links a { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 400; color: var(--ink); padding: 0.3rem 0; }
  .nav-links a::after { left: 0; right: 0; bottom: 0; }
  .menu-open .nav-links { clip-path: circle(150% at calc(100% - 40px) 40px); }
  .menu-open { overflow: hidden; }
}

/* Footer */
.site-footer { background: var(--night); color: var(--on-night-soft); padding-block: var(--space-xl) var(--space-lg); position: relative; overflow: hidden; }
.site-footer .brand img { padding: 6px; border-radius: 50%; background: var(--paper); }
.site-footer a { text-decoration: none; transition: color var(--duration-fast); }
.site-footer a:hover { color: var(--gold-light); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: var(--space-lg); }
.footer-grid h2 { font-size: var(--text-xs); font-family: var(--font-body); font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--gold-light); margin-bottom: var(--space-sm); }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.footer-tag { font-family: var(--font-display); font-size: var(--text-xl); color: var(--on-night); line-height: 1.2; max-width: 18ch; margin-top: var(--space-md); }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-sm); margin-top: var(--space-xl); padding-top: var(--space-md); border-top: 1px solid var(--line-night); font-size: var(--text-xs); }
.footer-disclaimer { max-width: 70ch; }
.footer-ecg { position: absolute; left: 0; right: 0; top: 0; height: 60px; opacity: 0.5; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity var(--duration-slow) var(--ease-out-expo), transform var(--duration-slow) var(--ease-out-expo); transition-delay: var(--delay, 0ms); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal-mask { clip-path: inset(0 0 100% 0); transition: clip-path 1.2s var(--ease-out-expo); transition-delay: var(--delay, 0ms); }
.reveal-mask.is-visible { clip-path: inset(0 0 0 0); }

/* Split headline words */
/* Generous bottom padding keeps descenders (g, y, p) inside the clipping mask */
.split .word { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.24em; margin-bottom: -0.24em; }
.split .word > span { display: inline-block; transform: translateY(105%); transition: transform 1s var(--ease-out-expo); transition-delay: calc(var(--i) * 60ms + var(--delay, 0ms)); }
.split.is-visible .word > span { transform: none; }

.no-js .reveal, .no-js .reveal-mask { opacity: 1; transform: none; clip-path: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal, .reveal-mask, .split .word > span { opacity: 1; transform: none; clip-path: none; }
}