/* ═══════════════════════════════════════════════════════════════
   WEBSOFTWARE — main.css  (Enterprise Edition)
   Variables · Reset · Tipografía · Layout · Nav · Footer
   ═══════════════════════════════════════════════════════════════ */

/* ── 1. Variables ────────────────────────────────────────────── */
:root {
  /* Paleta corporativa */
  --color-bg:            #ffffff;
  --color-surface:       #f5f7fa;
  --color-surface-2:     #eef1f6;
  --color-primary:       #0057b8;
  --color-primary-dark:  #003f8a;
  --color-primary-light: #e8f0fb;
  --color-primary-mid:   #ccdcf5;
  --color-secondary:     #00b0ca;
  --color-accent-strip:  #0057b8;
  --color-text:          #1c2333;
  --color-text-muted:    #556070;
  --color-text-light:    #8c97a8;
  --color-border:        #d8dde6;
  --color-border-hover:  #b0bcd0;
  --color-success:       #107e3e;
  --color-success-light: #f0faf3;
  --color-error:         #bb0000;
  --color-error-light:   #fff0f0;
  --color-warning:       #df6e0c;

  /* Tipografía */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Espaciado */
  --space-1:  0.25rem;  --space-2:  0.5rem;
  --space-3:  0.75rem;  --space-4:  1rem;
  --space-5:  1.25rem;  --space-6:  1.5rem;
  --space-8:  2rem;     --space-10: 2.5rem;
  --space-12: 3rem;     --space-16: 4rem;
  --space-20: 5rem;     --space-24: 6rem;
  --space-32: 8rem;

  /* Bordes */
  --radius-sm:   4px;
  --radius-md:   6px;
  --radius-lg:   10px;
  --radius-xl:   14px;
  --radius-full: 9999px;

  /* Sombras corporativas (sutiles, sin glow) */
  --shadow-xs: 0 1px 3px rgba(28,35,51,.08);
  --shadow-sm: 0 2px 8px rgba(28,35,51,.10);
  --shadow-md: 0 4px 20px rgba(28,35,51,.12);
  --shadow-lg: 0 8px 40px rgba(28,35,51,.14);
  --shadow-card: 0 2px 12px rgba(28,35,51,.09);
  --shadow-card-hover: 0 8px 32px rgba(0,87,184,.18);

  /* Transiciones */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --container-xl:  1280px;
  --nav-height:    68px;
}

/* ── 2. Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ── 3. Tipografía ───────────────────────────────────────────── */
h1 { font-size: clamp(var(--text-4xl), 5.5vw, var(--text-6xl)); font-weight: 700; line-height: 1.12; letter-spacing: -0.025em; }
h2 { font-size: clamp(var(--text-3xl), 3.5vw, var(--text-5xl)); font-weight: 700; line-height: 1.18; letter-spacing: -0.02em; }
h3 { font-size: clamp(var(--text-xl), 2vw, var(--text-2xl));    font-weight: 600; line-height: 1.3; }
h4 { font-size: var(--text-lg); font-weight: 600; line-height: 1.4; }
p  { color: var(--color-text-muted); line-height: 1.75; }

.text-primary { color: var(--color-primary); }
.text-muted   { color: var(--color-text-muted); }

/* ── 4. Layout ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
@media (min-width: 768px)  { .container { padding-inline: var(--space-8); } }
@media (min-width: 1280px) { .container { padding-inline: var(--space-12); } }

.section        { padding-block: var(--space-24); }
.section--sm    { padding-block: var(--space-16); }
.section--alt   { background: var(--color-surface); }
.section__header { text-align: center; margin-bottom: var(--space-16); }

.section__eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section__title { margin-bottom: var(--space-4); color: var(--color-text); }
.section__desc  { font-size: var(--text-lg); max-width: 580px; margin-inline: auto; }

.section-rule {
  width: 48px; height: 3px;
  background: var(--color-primary);
  margin: var(--space-5) auto 0;
  border-radius: 2px;
}

/* Grids */
.grid-2 { display: grid; gap: var(--space-6); grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { display: grid; gap: var(--space-6); grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { display: grid; gap: var(--space-6); grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* ── 5. Navegación ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  transition: box-shadow var(--transition-base);
}
.nav.scrolled { box-shadow: var(--shadow-md); }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.nav__logo-mark {
  width: 34px; height: 34px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
  letter-spacing: 0;
}
.nav__logo-text em {
  font-style: normal;
  color: var(--color-primary);
}

.nav__links { display: flex; align-items: center; gap: var(--space-6); }

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  padding-block: var(--space-2);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.nav__link:hover, .nav__link.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav__cta {
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}
.nav__cta:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.nav__hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height); left: 0; right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-1);
  z-index: 99;
  box-shadow: var(--shadow-md);
}
.nav__mobile-menu.open { display: flex; }
.nav__mobile-link {
  font-size: var(--text-base); font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}
.nav__mobile-link:hover { color: var(--color-primary); }

@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
}

/* ── 6. Botones ──────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm); font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary); color: #fff;
  border: 2px solid var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}
.btn--outline {
  background: transparent; color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary-light);
}
.btn--ghost {
  color: var(--color-text-muted);
  border: 2px solid transparent;
}
.btn--ghost:hover {
  background: var(--color-surface);
  color: var(--color-text);
}
.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); border-radius: var(--radius-lg); }
.btn--sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }

.btn--white {
  background: #fff; color: var(--color-primary);
  border: 2px solid #fff;
}
.btn--white:hover { background: var(--color-primary-light); border-color: var(--color-primary-light); }

.btn--white-outline {
  background: transparent; color: #fff;
  border: 2px solid rgba(255,255,255,.5);
}
.btn--white-outline:hover { background: rgba(255,255,255,.1); border-color: #fff; }

/* ── 7. Footer ───────────────────────────────────────────────── */
.footer {
  background: #1c2333;
  color: #b8c4d0;
  padding-block: var(--space-16) var(--space-8);
  border-top: 4px solid var(--color-primary);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}
.footer__brand p { font-size: var(--text-sm); max-width: 280px; margin-top: var(--space-4); color: #8fa0b4; }
.footer__logo { display: inline-flex; align-items: center; gap: var(--space-3); font-size: var(--text-xl); font-weight: 800; color: #fff; margin-bottom: var(--space-4); }
.footer__logo-mark { width: 34px; height: 34px; background: var(--color-primary); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: var(--text-xs); font-weight: 900; color: #fff; flex-shrink: 0; }
.footer__col-title { font-size: var(--text-xs); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: #fff; margin-bottom: var(--space-5); }
.footer__links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer__link { font-size: var(--text-sm); color: #8fa0b4; transition: color var(--transition-fast); }
.footer__link:hover { color: #fff; }
.footer__bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: var(--text-sm); color: #6a7d94;
}
.footer__social { display: flex; gap: var(--space-3); }
.footer__social-link {
  width: 34px; height: 34px; border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--text-xs); color: #8fa0b4;
  transition: all var(--transition-fast);
}
.footer__social-link:hover { border-color: var(--color-primary); color: #fff; background: var(--color-primary); }

@media (max-width: 768px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .footer__brand { grid-column: 1 / -1; }
  .footer__bottom { flex-direction: column; gap: var(--space-3); text-align: center; }
}
@media (max-width: 480px) { .footer__grid { grid-template-columns: 1fr; } }

/* ── 8. Utilidades ───────────────────────────────────────────── */
.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; }
.text-center { text-align: center; }
.hidden { display: none !important; }

/* Input */
.input {
  width: 100%;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}
.input::placeholder { color: var(--color-text-light); }
.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-surface); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

::selection { background: var(--color-primary-light); color: var(--color-primary-dark); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

/* Page loader */
.page-loader {
  position: fixed; inset: 0;
  background: #fff; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 300ms ease, visibility 300ms ease;
}
.page-loader.hidden { opacity: 0; visibility: hidden; }
.loader-ring {
  width: 40px; height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spinSlow 700ms linear infinite;
}
@keyframes spinSlow { to { transform: rotate(360deg); } }