/* style.css - Trazos & Papel */
@import 'variables.css';

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  font-weight: 400;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  font-weight: 700;
  color: var(--text-color);
}
h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.5px; }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.4rem, 3vw, 2rem); }
p { margin-bottom: var(--space-sm); }

a { color: var(--accent-color); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--accent-color-hover); }
ul { list-style: none; }
img, svg { max-width: 100%; height: auto; display: block; }

/* A11y Focus */
:focus-visible { outline: 3px solid var(--secondary-color); outline-offset: 3px; border-radius: 4px; }

/* Layout Utils */
.container { width: 90%; max-width: var(--container-width); margin: 0 auto; }
.section { padding: var(--space-xl) 0; }
.text-center { text-align: center; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.8rem 2rem;
  font-family: var(--font-heading); font-weight: 700; font-size: 1rem;
  cursor: pointer; transition: all var(--transition-fast);
  border: 2px solid transparent; border-radius: 50px;
}
.btn-primary {
  background-color: var(--accent-color);
  color: white;
}
.btn-primary:hover {
  background-color: var(--accent-color-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
[data-theme="dark"] .btn-primary { color: var(--bg-color); }
[data-theme="dark"] .btn-primary:hover { box-shadow: 0 4px 12px hsla(260, 50%, 75%, 0.2); }

.btn-secondary {
  background-color: transparent;
  color: var(--text-color);
  border-color: var(--text-color);
}
.btn-secondary:hover {
  background-color: var(--text-color);
  color: var(--bg-color);
}

/* Header */
.header {
  position: sticky; top: 0;
  background-color: var(--overlay-bg); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000; padding: 1.2rem 0;
  transition: all var(--transition-normal);
}
.header.scrolled { padding: 0.8rem 0; box-shadow: 0 4px 20px rgba(0,0,0,0.03); }
.nav-container { display: flex; justify-content: space-between; align-items: center; }

.logo {
  font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700;
  color: var(--text-color);
  display: flex; align-items: center; gap: 0.5rem;
}
.logo svg { stroke: var(--accent-color); width: 28px; height: 28px; }

.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-link {
  font-family: var(--font-heading); font-weight: 600; font-size: 1rem;
  color: var(--text-color-muted); position: relative; padding: 0.5rem 0;
}
.nav-link::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 100%; height: 3px; background-color: var(--accent-color);
  transform: scaleX(0); transform-origin: right; transition: transform var(--transition-fast);
  border-radius: 2px;
}
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); transform-origin: left; }
.nav-link:hover, .nav-link.active { color: var(--text-color); }

/* Theme Toggle & Mobile Menu */
.theme-toggle { background: none; border: none; cursor: pointer; color: var(--text-color); padding: 0.5rem; border-radius: 50%; transition: background-color var(--transition-fast); }
.theme-toggle:hover { background-color: var(--border-color); }
.mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; color: var(--text-color); padding: 0.5rem; }

@media (max-width: 992px) {
  .mobile-menu-btn { display: block; }
  .nav-links {
    position: fixed; top: 0; right: -100%;
    width: 100%; height: 100vh;
    background-color: var(--bg-color);
    flex-direction: column; justify-content: center; align-items: center; gap: var(--space-md);
    transition: right var(--transition-normal);
  }
  .nav-links.open { right: 0; }
  .nav-link { font-size: 1.5rem; }
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color); padding: var(--space-xl) 0 var(--space-md);
  margin-top: var(--space-xl); background-color: var(--card-bg);
}
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-lg); }
.footer h3 { font-size: 1.2rem; color: var(--text-color); margin-bottom: 1.5rem; }
.footer p, .footer-links a { font-size: 0.95rem; color: var(--text-color-muted); }
.footer-links li { margin-bottom: 0.8rem; }
.footer-links a:hover { color: var(--accent-color); }
.footer-bottom {
  text-align: center; margin-top: var(--space-lg); padding-top: var(--space-md);
  border-top: 1px solid var(--border-color); font-size: 0.85rem; color: var(--text-color-muted);
}