/* Reset & Base Styles */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 600;
  color: var(--accent-1);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.5px;
}

a { color: var(--accent-1); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-1-hover); }

img, svg { max-width: 100%; display: block; }

/* Accessibility Focus */
*:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

/* Layout */
.container { width: 90%; max-width: 1100px; margin: 0 auto; }
section { padding: var(--spacing-xl) 0; }

/* Header & Navigation */
header {
  background-color: transparent;
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
header.scrolled {
  position: fixed;
  background-color: var(--bg-color);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border-color);
  animation: slideDown 0.3s ease-out;
}
@keyframes slideDown { from { transform: translateY(-100%); } to { transform: translateY(0); } }

.nav-container {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--spacing-sm) 0;
}

.logo {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-1);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.nav-links { display: flex; gap: var(--spacing-md); align-items: center; }
.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 1px;
  background-color: var(--accent-1); transition: width var(--transition-fast);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.theme-toggle, .menu-toggle {
  background: none; border: none; cursor: pointer; color: var(--text-color);
  padding: 0.5rem; border-radius: var(--radius-round); display: flex; align-items: center;
}
.theme-toggle:hover, .menu-toggle:hover { background-color: var(--bg-color-alt); }
.menu-toggle { display: none; }

/* Buttons */
.btn {
  display: inline-block; padding: 1rem 2rem; border-radius: 0; /* Bordes rectos elegantes */
  font-family: var(--font-body); font-weight: 600; text-transform: uppercase; letter-spacing: 1px;
  text-align: center; cursor: pointer; border: 1px solid transparent;
  transition: all var(--transition-fast); font-size: 0.9rem;
}
.btn-primary { background-color: var(--accent-1); color: var(--bg-color); }
.btn-primary:hover { background-color: var(--accent-1-hover); color: var(--bg-color); }
.btn-secondary { background-color: transparent; color: var(--accent-1); border-color: var(--accent-1); }
.btn-secondary:hover { background-color: var(--accent-1); color: var(--bg-color); }

/* Cards / Menu Items */
.card {
  background-color: var(--card-bg);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  transition: border-color var(--transition-normal);
}
.card:hover { border-color: var(--accent-1); }

/* Footer */
footer {
  background-color: var(--bg-color-alt);
  padding: var(--spacing-lg) 0;
  text-align: center;
  border-top: 1px solid var(--border-color);
  font-family: var(--font-title);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 0; right: -100%; height: 100vh; width: 100%;
    background-color: var(--bg-color); flex-direction: column; justify-content: center;
    transition: right var(--transition-normal); z-index: 200;
  }
  .nav-links.open { right: 0; }
  .menu-toggle { display: flex; z-index: 201; }
}