/* ============================================================
   shared.css — Mesa de Trabajo para Artista · Dos Islas
   Estilos compartidos entre todas las páginas del proyecto:
   - Reset
   - Variables CSS (:root)
   - Base (body, grid de fondo)
   - Barra de navegación
   ============================================================ */

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

/* ── Variables ── */
:root {
  --bg:     #0d1b2a;
  --ink:    #e8eff7;
  --accent: #4a9ecd;
  --yellow: #f4c842;
  --green:  #6ec9a0;
  --red:    #e07070;
  --dim:    rgba(232, 239, 247, 0.38);
  --grid:   rgba(74, 158, 205, 0.065);

  /* Materiales (usados en planos SVG) */
  --mdf:      rgba(200, 170, 100, 0.55);
  --mdf-fill: rgba(200, 170, 100, 0.12);
  --alum:     rgba(180, 200, 220, 0.8);
  --alum-fill:rgba(180, 200, 220, 0.18);
}

/* ── Base ── */
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(rgba(74, 158, 205, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 158, 205, 0.025) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  pointer-events: none;
  z-index: 0;
}

/* ── Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 20, 34, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(74, 158, 205, 0.25);
  padding: 0 28px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.navbar-brand-icon {
  width: 30px;
  height: 30px;
  border: 1.5px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(45deg);
  transition: background 0.2s;
}
.navbar-brand:hover .navbar-brand-icon {
  background: rgba(74, 158, 205, 0.15);
}
.navbar-brand-icon svg {
  transform: rotate(-45deg);
}
.navbar-brand-text {
  font-family: 'Bebas Neue';
  font-size: 1.15rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  line-height: 1;
}
.navbar-brand-sub {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.6rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

/* Desktop nav links */
.navbar-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.navbar-links a {
  display: flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--dim);
  padding: 6px 14px;
  border: 1px solid transparent;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: color 0.18s, border-color 0.18s, background 0.18s;
}
.navbar-links a:hover {
  color: var(--ink);
  border-color: rgba(74, 158, 205, 0.3);
  background: rgba(74, 158, 205, 0.07);
}
.navbar-links a.active {
  color: var(--accent);
  border-color: rgba(74, 158, 205, 0.4);
  background: rgba(74, 158, 205, 0.1);
}
.navbar-links a .nav-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
  opacity: 0.6;
}

/* Hamburger button (mobile only) */
.navbar-burger {
  display: none;
  background: none;
  border: 1px solid rgba(74, 158, 205, 0.4);
  color: var(--ink);
  cursor: pointer;
  padding: 6px 9px;
  transition: background 0.18s, border-color 0.18s;
}
.navbar-burger:hover {
  background: rgba(74, 158, 205, 0.1);
  border-color: var(--accent);
}

/* Mobile dropdown */
.navbar-mobile-menu {
  display: none;
  position: absolute;
  top: 54px;
  left: 0;
  right: 0;
  background: rgba(10, 20, 34, 0.97);
  border-bottom: 1px solid rgba(74, 158, 205, 0.25);
  padding: 8px 0;
  z-index: 99;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}
.navbar-mobile-menu.open {
  display: block;
}
.navbar-mobile-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--dim);
  padding: 13px 28px;
  border-left: 3px solid transparent;
  transition: color 0.18s, border-color 0.18s, background 0.18s;
}
.navbar-mobile-menu a:hover {
  color: var(--ink);
  background: rgba(74, 158, 205, 0.07);
  border-left-color: rgba(74, 158, 205, 0.5);
}
.navbar-mobile-menu a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(74, 158, 205, 0.08);
}
.navbar-wrapper {
  position: relative;
}

@media (max-width: 900px) {
  .navbar-links  { display: none; }
  .navbar-burger { display: block; }
  .navbar        { padding: 0 18px; }
}