/* ════════════════���══════════════════════════════
   UMBLE LEARN — Base Styles
   ════════════���══════════════════════════════════ */

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--ink);
  color: var(--fog);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

/* Headings */
h1 {
  font-family: var(--font-sans);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
}

h2 {
  font-family: var(--font-sans);
  font-size: 36px;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h3 {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

/* Body text */
.prose {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--fog-60);
  max-width: 720px;
}

.prose strong {
  color: var(--fog);
  font-weight: 500;
}

/* Mono labels */
.mono-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--fog-40);
  text-transform: uppercase;
}

.mono-sm {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fog-60);
}

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollPulse {
  0% { left: -100%; }
  50% { left: 100%; }
  100% { left: 100%; }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Utility */
.container {
  max-width: 1100px;
  margin: 0 auto;
}

/* Responsive base */
@media (max-width: 900px) {
  h1 { font-size: clamp(32px, 8vw, 56px); }
  h2 { font-size: 28px; }
}