/* =============================================
   DESIGN TOKENS
============================================= */
:root {
  --near-black:        #1C1C1C;
  --off-white:         #F5F4F0;
  --sage:              #6A8F6E;
  --sage-light:        #E8F0E9;
  --sage-dark:         #4A6B4E;
  --indigo:            #4A4A7A;
  --indigo-mid:        #7A7AB8;
  --indigo-light:      #EAEAF5;
  --terracotta:        #A05A4A;
  --terracotta-mid:    #C07060;
  --terracotta-light:  #F5EAE7;

  /* Text */
  --text-primary:      #1C1C1C;
  --text-secondary:    #4A4A4A;   /* darkened for contrast */
  --text-muted:        #5A5A5A;   /* darkened for contrast */
  --border:            rgba(28, 28, 28, 0.14);

  /* Typography */
  --font-display:      'DM Serif Display', Georgia, serif;
  --font-body:         'DM Sans', system-ui, sans-serif;

  /* Scale */
  --content-max:       1100px;
  --content-pad:       clamp(1rem, 5vw, 2rem);

  /* Font sizes — 16px base minimum */
  --text-xs:    0.75rem;    /* 12px — labels/badges only */
  --text-sm:    0.875rem;   /* 14px — secondary labels */
  --text-base:  1rem;       /* 16px — body minimum */
  --text-md:    1.125rem;   /* 18px */
  --text-lg:    1.25rem;    /* 20px */
  --text-xl:    1.5rem;     /* 24px */
  --text-2xl:   2rem;       /* 32px — h1 minimum */
}

/* =============================================
   SCREEN READER ONLY UTILITY
============================================= */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =============================================
   RESET & BASE
============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { overflow-x: hidden; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);  /* 16px minimum */
  line-height: 1.75;
  color: var(--text-primary);
  background: var(--off-white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Headings */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.015em;
}

/* h1 = 32px minimum, scales up on larger viewports */
h1 { font-size: clamp(2rem, 6vw, 5rem); }

/* h2 — strong visual hierarchy, clearly dominant over h3 and body */
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); line-height: 1.15; }

/* h3 — clearly subordinate to h2 */
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); line-height: 1.25; }

p {
  font-size: var(--text-base);
  font-weight: 300;
  line-height: 1.8;
}

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

/* =============================================
   SKIP LINK
============================================= */
.skip-link {
  position: absolute;
  top: -200%;
  left: 1rem;
  background: var(--sage-dark);   /* #4A6B4E — 5.99:1 on white text */
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 0 0 6px 6px;
  font-size: var(--text-base);
  font-weight: 500;
  z-index: 9999;
}
.skip-link:focus { top: 0; outline: 3px solid #fff; outline-offset: 2px; }

/* =============================================
   FOCUS STYLES — WCAG 2.1 AA
============================================= */
:focus-visible { outline: 2px solid var(--sage); outline-offset: 3px; border-radius: 2px; }
:focus:not(:focus-visible) { outline: none; }

/* =============================================
   NAVIGATION
   - Always opaque, never transparent
   - Shadow keeps it visually above content
============================================= */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  background: var(--near-black);          /* always opaque */
  box-shadow: 0 2px 16px rgba(0,0,0,0.45); /* strong shadow — always visible */
}

.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Nav name / home link */
.nav-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: #fff;
  letter-spacing: -0.01em;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 0.25rem;
  border-bottom: 1.5px solid transparent;
  transition: border-color 0.2s;
}
.nav-name:hover { border-color: var(--sage); color: #fff; }

/* Nav links list */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: var(--text-lg);       /* 20px */
  font-weight: 400;
  color: rgba(255,255,255,0.78);   /* meets 4.5:1 on near-black */
  letter-spacing: 0.01em;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 0.25rem;
  border-bottom: 1.5px solid transparent;
}
.nav-links a:hover,
.nav-links a:focus-visible { color: #fff; border-color: var(--sage); }

.nav-links a[aria-current="page"] {
  color: #fff;
  border-color: var(--sage);
}

.nav-external::after {
  content: ' ↗';
  font-size: 0.7em;
  opacity: 0.6;
}

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px;
  cursor: pointer;
  padding: 0.5rem;
  color: #fff;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}
.nav-toggle:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.06);
}

/* =============================================
   SHARED UTILITIES
============================================= */
.content-wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;                /* heavier for contrast */
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

/* =============================================
   BUTTONS
============================================= */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--sage-dark);   /* #4A6B4E — 5.99:1 on white text */
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  padding: 0.8125rem 1.5rem;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  min-height: 44px;
}

.btn-primary:hover { background: #3A5B3E; color: #fff; }
.btn-primary:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }

.btn-primary svg {
  width: 14px; height: 14px;
  stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 4px;
  padding: 0.6875rem 1.25rem;
  min-height: 44px;
}
.btn-ghost:hover {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.08);
  color: #fff;
}

/* =============================================
   FOOTER
============================================= */
footer {
  background: #111;
  padding: 2.5rem 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-id { flex-shrink: 0; }

.footer-name {
  font-family: var(--font-display);
  font-size: var(--text-base);     /* 16px */
  color: rgba(255,255,255,0.88);
  margin-bottom: 0.2rem;
}

.footer-title {
  font-size: var(--text-base);     /* 16px */
  font-weight: 300;
  color: rgba(255,255,255,0.60);
}

/* Footer links — plain ul, no nav landmark (footer is enough) */
.footer-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-connect-label {
  font-size: var(--text-base);     /* 16px */
  font-weight: 400;
  color: rgba(255,255,255,0.60);
  margin-right: 0.25rem;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--text-base);     /* 16px */
  font-weight: 400;
  color: rgba(255,255,255,0.78);
  padding: 0.4rem 1rem;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 100px;
  min-height: 44px;
}
.footer-link:hover { color: #fff; border-color: rgba(255,255,255,0.45); }

.footer-link svg {
  width: 14px; height: 14px;
  stroke: currentColor; fill: none;
  stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}

/* =============================================
   ANIMATIONS — prefers-reduced-motion aware
============================================= */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }

  .site-nav { transition: box-shadow 0.3s ease; }
  .nav-name,
  .nav-links a  { transition: color 0.2s, border-color 0.2s; }
  .nav-toggle   { transition: border-color 0.2s, background 0.2s; }
  .btn-primary  { transition: background 0.2s, transform 0.15s; }
  .btn-primary:hover { transform: translateY(-1px); }
  .btn-ghost    { transition: border-color 0.2s, background 0.2s; }
  .footer-link  { transition: color 0.2s, border-color 0.2s; }

  .animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }
  .animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .animate-on-scroll { opacity: 1; transform: none; }
}

/* =============================================
   RESPONSIVE — Mobile (≤ 768px)
============================================= */
@media (max-width: 768px) {
  .nav-toggle { display: inline-flex; }

  .nav-links {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--near-black);
    padding: 1rem var(--content-pad) 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    width: 100%;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    border-left: none;
  }
  .nav-links li:last-child a { border-bottom: none; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* =============================================
   RESPONSIVE — 320px reflow (WCAG 1.4.10)
============================================= */
@media (max-width: 360px) {
  :root { --content-pad: 1rem; }
  .footer-links { flex-direction: column; align-items: flex-start; }
}