/* ================================================================
   THE ESSENTIAL ARCHITECT — Shared Design System
   ================================================================ */

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

:root {
  /* Palette */
  --bg:      #f5f2eb;
  --border:  #d6d2c8;
  --text:    #18160f;
  --muted:   #6e6b62;

  /* Typography */
  --font:    'Times New Roman', Times, Georgia, serif;
  --t-xs:    clamp(.72rem,  .66rem + .3vw,  .85rem);
  --t-sm:    clamp(.875rem, .82rem + .28vw, 1rem);
  --t-base:  clamp(1rem,    .95rem + .25vw, 1.15rem);
  --t-lg:    clamp(1.25rem, 1.05rem + .9vw, 1.9rem);

  /* Spacing */
  --sp-2: .5rem;   --sp-3: .75rem;  --sp-4: 1rem;    --sp-5: 1.25rem;
  --sp-6: 1.5rem;  --sp-8: 2rem;    --sp-10: 2.5rem; --sp-12: 3rem;
  --sp-16: 4rem;   --sp-20: 5rem;

  /* Motion & Layout */
  --trans: 160ms cubic-bezier(.16, 1, .3, 1);
  --w:     1100px;
}

/* ── BASE ── */

html { -webkit-font-smoothing: antialiased; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--t-base);
  line-height: 1.65;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* Focus — visible only for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── NAVIGATION ── */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  will-change: transform;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  padding: var(--sp-4) clamp(var(--sp-6), 4vw, var(--sp-16));
  gap: var(--sp-2) var(--sp-6);
}

.nav-brand {
  font-size: var(--t-sm);
  font-variant: small-caps;
  letter-spacing: .1em;
  white-space: nowrap;
  transition: opacity var(--trans);
}
.nav-brand:hover { opacity: .55; }

.nav-links {
  display: flex;
  gap: clamp(var(--sp-4), 2vw, var(--sp-10));
  list-style: none;
  overflow: visible;
  align-items: center;
}

.nav-links a {
  font-size: var(--t-sm);
  font-variant: small-caps;
  letter-spacing: .08em;
  white-space: nowrap;
  opacity: .5;
  padding-bottom: 3px;
  border-bottom: 1.5px solid transparent;
  transition: opacity var(--trans);
}
.nav-links a:hover { opacity: 1; }
.nav-links a.active { opacity: 1; border-color: var(--text); }

/* ── HOMEPAGE HERO ── */

.hero {
  max-width: var(--w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr clamp(200px, 30vw, 400px);
  align-items: center;
  gap: var(--sp-8);
  padding: 0 clamp(var(--sp-6), 4vw, var(--sp-16));
}

.hero-title {
  font-size: clamp(2.2rem, .8rem + 5vw, 5rem);
  line-height: .92;
  letter-spacing: -.01em;
  margin-bottom: var(--sp-8);
}

.hero-rule {
  width: 100%;
  height: 2px;
  background: var(--text);
  margin-bottom: var(--sp-5);
}
.hero-head { display: inline-block; }

.hero-sub {
  font-size: var(--t-base);
  color: var(--muted);
  max-width: 40ch;
  line-height: 1.55;
  font-style: italic;
}

.hero-illo { align-self: end; }
.rooster   { width: 100%; height: auto; }

/* Disable scrolling for index page */
body.no-scroll {
  overflow: hidden;
  height: 100dvh;
  overscroll-behavior: none;
  display: flex;
  flex-direction: column;
}

body.no-scroll .hero {
  flex: 1;
  height: auto;
}

/* ── LAW PAGE LAYOUT ── */

.law-wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: clamp(var(--sp-12), 8vw, var(--sp-20))
           clamp(var(--sp-6), 4vw, var(--sp-16));
}

.law-content { text-align: center; }

.law-rule-top {
  width: 70px;
  height: 2px;
  background: var(--text);
  margin: 0 auto var(--sp-8);
}

.law-num {
  font-size: var(--t-lg);
  letter-spacing: .03em;
  margin-bottom: var(--sp-3);
}

.law-title {
  font-size: var(--t-base);
  font-style: italic;
  color: var(--muted);
  margin-bottom: var(--sp-8);
}

.law-rule-bottom {
  width: 70px;
  height: 2px;
  background: var(--text);
  margin: 0 auto var(--sp-10);
}

.law-body {
  text-align: left;
  font-size: var(--t-base);
  line-height: 1.82;
}
.law-body p + p { margin-top: var(--sp-6); }
.law-body a {
  border-bottom: 1px solid var(--muted);
  transition: opacity var(--trans);
}
.law-body a:hover { opacity: .65; }

/* ── KEY PRINCIPLES & PRACTICAL APPLICATION ── */

.law-section-label {
  font-size: var(--t-lg);
  letter-spacing: .01em;
  margin: var(--sp-12) 0 var(--sp-4);
}

.law-principles {
  list-style: none;
  margin: 0;
  border-top: 1px solid var(--border);
}
.law-principles li {
  padding: var(--sp-4) 0;
  /* border-bottom: 1px solid var(--border); */
  line-height: 1.75;
}
/* .law-principles li:first-child { border-top: 1px solid var(--border); } */
.law-principles h3 {
  font-size: var(--t-base);
  font-weight: 700;
  margin-bottom: .2rem;
}

.law-applications {
  list-style: disc;
  padding-left: var(--sp-6);
  margin: 0;
  border-top: 1px solid var(--border);
}
.law-applications li {
  padding: var(--sp-3) 0;
  line-height: 1.75;
}
.law-applications li::marker {
  color: var(--muted);
}

/* ── PREV / NEXT NAV ── */

.law-nav {
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  padding: var(--sp-6) clamp(var(--sp-6), 4vw, var(--sp-16));
}

.law-nav-btn {
  font-size: var(--t-xs);
  font-variant: small-caps;
  letter-spacing: .08em;
  opacity: .55;
  transition: opacity var(--trans);
}
.law-nav-btn:hover { opacity: 1; }

.law-nav-placeholder {
  font-size: var(--t-xs);
  font-variant: small-caps;
  letter-spacing: .08em;
  opacity: .18;
  cursor: default;
  user-select: none;
}

/* ── RESPONSIVE ── */

@media (max-width: 640px) {
  .hero {
    grid-template-columns: 1fr;
    align-items: start;
    padding-top: var(--sp-8);
  }
  /* Keep the illustration visible on small viewports but reduce its size
     and stack it under the content to avoid layout overflow. */
  .hero-illo {
    display: block;
    align-self: start;
    margin-top: var(--sp-6);
  }
  .rooster {
    width: clamp(120px, 36vw, 240px);
    height: auto;
  }
  .law-content { text-align: left; }
  .law-rule-top,
  .law-rule-bottom { margin-left: 0; }
}

/* ── PRINT ── */

@media print {
  .site-nav, .law-nav { display: none; }
  body { font-size: 11pt; }
  .law-wrap { min-height: auto; padding: 2rem 0; }
}