/* ============================================
   STELLA ZUBECK — Site Styles
   Minimal, airy, editorial
   ============================================ */

@import url('https://use.typekit.net/oqw4qix.css');

/* ── Variables ─────────────────────────────── */
:root {
  --blue:       hsl(218, 45%, 41%);
  --blue-light: hsl(218, 45%, 92%);
  --blue-mid:   hsl(218, 30%, 65%);
  --hover:      hsl(192, 24%, 50%);
  --bg:         hsl(0, 0%, 99%);
  --text:       hsl(0, 0%, 34%);
  --text-light: hsl(0, 0%, 58%);
  --text-xlight:hsl(0, 0%, 74%);
  --rule:       hsl(0, 0%, 88%);
  --white:      #ffffff;

  --font:       'proxima-nova', sans-serif;

  --max-w:      900px;
  --side-pad:   clamp(24px, 5vw, 80px);

  --transition: 0.22s ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; scroll-padding-top: 120px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-weight: 400;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Typography ────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font);
  font-weight: 500;
  line-height: 1.25;
  color: var(--text);
}

.site-name {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  font-family: 'proxima-nova', sans-serif;
}

.site-name:hover { color: var(--blue); transition: color var(--transition); }

.site-tagline {
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text);
  font-family: 'proxima-nova', sans-serif;
}

/* ── Layout ─────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--side-pad);
}

/* ── Nav ─────────────────────────────────────── */
header {
  
  
  
  background: hsla(0, 0%, 99%, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 40px 0 40px;
}

.nav-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--side-pad);
}

.nav-brand { display: flex; flex-direction: column; gap: 0; }
.site-tagline { margin-top: -2px; }

nav ul {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

nav a {
  font-size: 1.0rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  line-height: 1.2;
  text-transform: uppercase;
  color: var(--text);
  transition: color var(--transition);
  position: relative;
  font-family: 'proxima-nova', sans-serif;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
}

nav a::before {
  content: attr(data-text);
  font-weight: 700;
  height: 0;
  overflow: hidden;
  visibility: hidden;
  pointer-events: none;
  letter-spacing: 0.14em;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--blue);
  transition: width var(--transition);
}

nav a:hover,
nav a:focus {
  color: var(--blue);
}

nav a.active {
  color: var(--blue);
  font-weight: 700;
}

nav a::after { display: none; }

/* ── Footer ─────────────────────────────────── */
footer {
  margin-top: 100px;
  padding: 40px 0;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--side-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.88rem;
  color: var(--text);
  letter-spacing: 0.04em;
}

.footer-linkedin {
  display: flex;
  align-items: center;
  color: var(--text-light);
  transition: color var(--transition);
}
.footer-linkedin svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}
.footer-linkedin:hover { color: var(--blue); }

/* ── Page header ─────────────────────────────── */
.page-header {
  padding: 64px 0 48px;
  margin-bottom: 64px;
}

.page-header h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-header .label {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue-mid);
  margin-bottom: 12px;
}

/* ── Inline links ──────────────────────────── */
.prose a {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
}
.prose a:hover {
  text-decoration: underline;
}

/* ── Utilities ─────────────────────────────── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ── Mobile nav ────────────────────────────── */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text);
  border-radius: 4px;
}

@media (max-width: 600px) {
  .nav-inner { flex-wrap: wrap; }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-left: auto;
  }
  .nav-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: currentColor;
    transform-origin: center;
    transition: var(--transition);
  }
  .nav-toggle:focus,
  .nav-toggle:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 3px;
    color: var(--blue);
  }
  header:has(nav.open) .nav-toggle {
    color: var(--blue);
  }
  header:has(nav.open) .nav-toggle span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
  }
  header:has(nav.open) .nav-toggle span:nth-child(2) {
    opacity: 0;
  }
  header:has(nav.open) .nav-toggle span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
  }

  nav {
    display: none;
    position: static;
    flex-basis: 100%;
    width: 100%;
    background: var(--bg);
    padding: 20px 0 8px;
  }
  nav.open { display: block; }
  nav ul { flex-direction: column; gap: 10px; align-items: flex-start; }
  nav a { font-size: 0.9rem; }
}

/* ── Case study page label ───────────────────── */
.cs-page-label {
  font-size: 1.0rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid hsl(0,0%,85%);
  text-align: left;
}