/* ============================================================
   global.css — Reset, variables, tipografía, nav, footer
   alvarocofre.dev
   ============================================================ */

/* ── CUSTOM PROPERTIES ──────────────────────────────────────── */
:root {
  --white:   #ffffff;
  --bg:      #fafafa;
  --surface: #f4f4f4;
  --border:  #e5e5e5;
  --ink:     #111111;
  --ink-2:   #444444;
  --ink-3:   #888888;
  --accent:  #111111;
  --green:   #1a7a4a;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --text-xs:  13px;
  --text-sm:  15px;
  --text-md:  17px;
  --text-lg:  24px;
  --text-xl:  32px;
  --text-2xl: 48px;
  --text-3xl: 64px;

  --radius-sm:  10px;
  --radius-md:  16px;
  --radius-pill: 999px;

  --nav-h: 64px;
  --max-w: 1120px;
  --gap:   clamp(1.5rem, 4vw, 3rem);
}

/* ── RESET ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font);
  font-size: var(--text-md);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; border: none; background: none; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 600; }

/* ── GRID BACKGROUND ─────────────────────────────────────────── */
.grid-bg {
  position: relative;
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

/* ── UTILITIES ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2rem);
}

.section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

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

/* ── BADGES / PILLS ──────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--ink-2);
}

.badge--green {
  border-color: color-mix(in srgb, var(--green) 25%, transparent);
  background: color-mix(in srgb, var(--green) 8%, transparent);
  color: var(--green);
}

.badge--green::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
}

@media (prefers-reduced-motion: no-preference) {
  .badge--green::before {
    animation: pulse-dot 2s ease-in-out infinite;
  }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

/* ── BUTTONS ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--ink);
  color: var(--white);
}
.btn--primary:hover { opacity: 0.85; }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}
.btn--ghost:hover { background: var(--surface); }

/* ── PILL TAGS ───────────────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  background: var(--surface);
  color: var(--ink-2);
  border: 1px solid var(--border);
}

/* ── SECTION LABEL ───────────────────────────────────────────── */
.section-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.75rem;
}

/* ── REVEAL ANIMATION ────────────────────────────────────────── */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: none;
  }
}

/* ── SCROLL PROGRESS BAR ─────────────────────────────────────── */
#scroll-bar {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 200;
  pointer-events: none;
}

/* ── NAVIGATION ──────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  border-bottom: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s, backdrop-filter 0.2s;
}

.nav.scrolled {
  background: rgba(250,250,250,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: var(--border);
}

.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__logo {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__links a {
  font-size: var(--text-sm);
  color: var(--ink-2);
  transition: color 0.15s;
}
.nav__links a:hover { color: var(--ink); }

.nav__cta {
  flex-shrink: 0;
}

/* Burger */
.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px; height: 32px;
  padding: 4px;
}

.nav__burger span {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

.nav__burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav drawer */
.nav__drawer {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem clamp(1rem, 5vw, 2rem) 1.5rem;
  z-index: 99;
}

.nav__drawer.open { display: block; }

.nav__drawer a {
  display: block;
  padding: 0.6rem 0;
  font-size: var(--text-md);
  color: var(--ink-2);
  border-bottom: 1px solid var(--border);
}
.nav__drawer a:last-child { border-bottom: none; }

/* Body offset for fixed nav */
body { padding-top: var(--nav-h); }

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__cta   { display: none; }
  .nav__burger { display: flex; }
}

/* ── FOOTER ──────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding-block: 3rem 2rem;
  font-size: var(--text-sm);
  color: var(--ink-3);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer__col-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 1rem;
}

.footer__col a {
  display: block;
  color: var(--ink-3);
  margin-bottom: 0.5rem;
  transition: color 0.15s;
}
.footer__col a:hover { color: var(--ink); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

@media (max-width: 600px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}