/* ==========================================================================
   base.css — Tipografia base, @font-face, estilos globales del documento
   ========================================================================== */

/* --- @font-face — fuentes locales variables ------------------------------ */

/* Inter Variable — cuerpo de texto */
@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter-var.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* Space Grotesk Variable — encabezados */
@font-face {
  font-family: 'Space Grotesk';
  src: url('../assets/fonts/space-grotesk-var.woff2') format('woff2-variations');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

/* --- Estilos base del documento ------------------------------------------ */

body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* --- Encabezados --------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-extrabold);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
}

h4 {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
}

h5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
}

/* --- Subtitulo de seccion ------------------------------------------------ */

.section-subtitle {
  font-family: var(--font-family-body);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  max-width: 640px;
  margin-inline: auto;
}

/* --- Label / overline ---------------------------------------------------- */

.overline {
  font-family: var(--font-family-body);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
  color: var(--color-primary);
}

/* --- Parrafos ------------------------------------------------------------ */

p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

p + p {
  margin-top: var(--space-4);
}

strong, b {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--font-size-sm);
}

/* --- Enlaces ------------------------------------------------------------- */

a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --- Seleccion de texto -------------------------------------------------- */

::selection {
  background-color: rgba(38, 161, 123, 0.3);
  color: var(--color-text-primary);
}

::-moz-selection {
  background-color: rgba(38, 161, 123, 0.3);
  color: var(--color-text-primary);
}

/* --- Scrollbar personalizada --------------------------------------------- */

/* Webkit (Chrome, Safari, Edge) */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

/* Firefox */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) var(--color-bg);
}

/* --- Texto con gradiente (utility) --------------------------------------- */

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --- Utilidad: solo visible para lectores de pantalla -------------------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* --- Skip link (accesibilidad) ------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-tooltip);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: none;
}

/* --- Codigo inline ------------------------------------------------------- */

code {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
  background: var(--color-surface);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

/* --- Separador ----------------------------------------------------------- */

hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-8) 0;
}

/* --- Focus global visible ------------------------------------------------ */

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* --- Overrides para modo claro ------------------------------------------- */

[data-theme="light"] ::selection {
  background-color: rgba(38, 161, 123, 0.2);
  color: var(--color-text-primary);
}

[data-theme="light"] ::-webkit-scrollbar-track {
  background: var(--color-bg);
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: var(--color-border);
}