html { scroll-behavior: smooth; }

body {
  font-family: var(--ff-ui);
  font-size: var(--fs-body);
  font-weight: 400;
  color: var(--bone);
  background-color: var(--void);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: 0 0;
  overflow-x: hidden;
}

main { display: block; }

/* Cap full page width on very large screens */
.page {
  max-width: var(--page-max);
  margin: 0 auto;
  position: relative;
}
@media (min-width: 1760px) {
  .page {
    border-left: 1px solid var(--hairline);
    border-right: 1px solid var(--hairline);
  }
}

/* Tipografía */
h1, h2, h3, h4 { font-family: var(--ff-display); font-weight: 600; letter-spacing: -0.02em; }

p { color: var(--bone); }

a { transition: color 200ms ease; }
a:hover { color: var(--param-cyan); }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--param-cyan);
  color: var(--void);
  padding: var(--sp-2) var(--sp-3);
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  text-transform: uppercase;
  z-index: 200;
  transition: top 200ms ease;
}
.skip-link:focus { top: 0; }

/* Foco visible global */
:focus-visible { outline: 2px solid var(--param-cyan); outline-offset: 4px; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--void); }
::-webkit-scrollbar-thumb { background: var(--steel); border: 2px solid var(--void); }
::-webkit-scrollbar-thumb:hover { background: var(--param-cyan); }

/* Cursor CAD desktop */
@media (hover: hover) and (pointer: fine) {
  body {
    cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><line x1="0" y1="10" x2="20" y2="10" stroke="%236FE3D2" stroke-width="1"/><line x1="10" y1="0" x2="10" y2="20" stroke="%236FE3D2" stroke-width="1"/><circle cx="10" cy="10" r="2" fill="%236FE3D2"/></svg>') 10 10, default;
  }
  a, button, input, textarea, select, [role="button"] { cursor: pointer; }
}

/* Utilidades */
.mono { font-family: var(--ff-mono); text-transform: uppercase; letter-spacing: 0.05em; }
.cyan { color: var(--param-cyan); }
.ash { color: var(--ash); }
.graphite { color: var(--graphite); }
.italic { font-style: italic; }

.section-label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--ff-mono);
  font-size: var(--fs-mono);
  color: var(--param-cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-4);
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--hairline);
}

.section-title {
  font-family: var(--ff-display);
  font-size: var(--fs-h2);
  font-weight: 500;
  color: var(--bone);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--sp-2);
}
.section-subtitle {
  font-family: var(--ff-display);
  font-style: italic;
  font-weight: 400;
  font-size: var(--fs-lg);
  color: var(--ash);
  margin-bottom: var(--sp-8);
}

/* Botones base */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 1rem 2.2rem;
  font-family: var(--ff-ui);
  font-weight: 500;
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 0;
  border: 1px solid transparent;
  transition: background 200ms ease, color 200ms ease, box-shadow 300ms ease, border-color 200ms ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--param-cyan);
  color: var(--void);
}
.btn--primary:hover {
  box-shadow: 0 0 32px rgba(111, 227, 210, 0.5);
  background: var(--param-glow);
  color: var(--void);
}
.btn--secondary {
  background: transparent;
  border-color: var(--bone);
  color: var(--bone);
}
.btn--secondary:hover {
  border-color: var(--param-cyan);
  color: var(--param-cyan);
}

.btn .arrow {
  display: inline-block;
  transition: transform 200ms ease;
}
.btn:hover .arrow { transform: translateX(4px); }

/* Section spacing */
.section { padding: var(--sp-16) 0; position: relative; }

/* Container */
.container {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}
.container--ultra { max-width: var(--container-ultra); }
.container--narrow { max-width: var(--container-narrow); }

@media (max-width: 640px) {
  .container { padding: 0 var(--sp-3); }
  .section { padding: var(--sp-12) 0; }
}