/* ==========================================================================
   Tuition Point — base styles, reset, typography
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--chalk);
  color: var(--text-on-chalk);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--step-5); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }
h4 { font-size: var(--step-1); }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }

ul { margin: 0; padding: 0; list-style: none; }

.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section { padding-block: var(--space-xl); }
.section-alt { background: var(--ink); color: var(--text-on-ink); }
.section-alt h2, .section-alt h3, .section-alt h4 { color: var(--text-on-ink); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue-dim);
  margin: 0 0 0.6em;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}
.section-alt .eyebrow { color: var(--yellow); }

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--ink);
  color: var(--chalk);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
}
.skip-link:focus {
  left: var(--space-md);
  top: var(--space-md);
}

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

.grid { display: grid; gap: var(--space-md); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition-delay: 0ms; }
}

/* Scroll progress bar -------------------------------------------------- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--blue), var(--yellow), var(--teal));
  z-index: 200;
  transition: width 0.1s linear;
}

/* Header scroll state ---------------------------------------------------- */
.site-header {
  transition: box-shadow var(--dur-fast) var(--ease), padding var(--dur-fast) var(--ease);
}
.site-header.is-scrolled {
  box-shadow: 0 8px 24px -18px rgba(20, 21, 31, 0.4);
}
.site-header.is-scrolled .site-header__bar { padding-block: 0.6rem; }

/* Marquee ------------------------------------------------------------------ */
.marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 32s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
  .marquee { overflow-x: auto; }
}

/* Tilt-ready elements ------------------------------------------------------ */
[data-tilt] {
  transition: transform var(--dur-fast) var(--ease-spring), box-shadow var(--dur-fast) var(--ease);
  will-change: transform;
  transform-style: preserve-3d;
}

/* Magnetic buttons ----------------------------------------------------------- */
[data-magnetic] {
  transition: transform var(--dur-fast) var(--ease-spring), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}