/* ============================================================
   Sciento — Base & Layout
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: "ss01", "cv02", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video { display: block; max-width: 100%; height: auto; }

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
a:hover { border-bottom-color: var(--ink); }

p { margin: 0 0 1em; }

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

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Typography ============================================ */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .5em;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.15;
}

.display-xl, .display-lg, .display, .h1-serif, .h2-serif {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.display-xl { font-size: clamp(2.6rem, 6vw + 1rem, 4.75rem); line-height: 1.02; letter-spacing: -0.03em; }
.display-lg { font-size: clamp(2.2rem, 4.5vw + 1rem, 3.5rem); line-height: 1.05; }
.display    { font-size: clamp(1.9rem, 3vw + 1rem, 2.75rem); line-height: 1.1; }
.h1-serif   { font-size: clamp(1.75rem, 2vw + 1rem, 2.25rem); line-height: 1.15; }
.h2-serif   { font-size: 1.625rem; line-height: 1.2; }

h1 { font-size: clamp(1.75rem, 2.5vw + .75rem, 2.25rem); }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

.lede {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 60ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--ink);
}

.mono { font-family: var(--font-mono); font-size: .875rem; }

/* Layout ================================================ */
.container, .container-wide, .container-prose, .container-content {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--s-5);
}
.container         { max-width: var(--container); }
.container-wide    { max-width: var(--container-wide); }
.container-prose   { max-width: var(--container-prose); }
.container-content { max-width: var(--container-content); }

@media (min-width: 768px) {
  .container, .container-wide, .container-prose, .container-content {
    padding-inline: var(--s-7);
  }
}

.section { padding-block: var(--s-9); }
.section-sm { padding-block: var(--s-7); }
.section-lg { padding-block: var(--s-10); }
.section-band { background: var(--surface-2); border-block: var(--border); }

.divider { border: 0; height: 1px; background: var(--line); margin: var(--s-7) 0; }

/* Utility ============================================== */
.stack > * + * { margin-top: var(--s-4); }
.stack-2 > * + * { margin-top: var(--s-2); }
.stack-6 > * + * { margin-top: var(--s-6); }

.row { display: flex; gap: var(--s-4); flex-wrap: wrap; align-items: center; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: var(--s-4); flex-wrap: wrap; }

.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.muted { color: var(--muted); }
.center { text-align: center; }
.max-prose { max-width: 60ch; }
.max-narrow { max-width: 36rem; }

.text-mono { font-family: var(--font-mono); }
.uppercase { text-transform: uppercase; letter-spacing: 0.08em; font-size: .75rem; }

.hide-mobile { display: none; }
@media (min-width: 880px) { .hide-mobile { display: revert; } .hide-desktop { display: none; } }

/* Skip link ============================================= */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: var(--s-3) var(--s-4);
  z-index: 1000;
}
.skip:focus { left: var(--s-4); top: var(--s-4); }