/* Matrits Guía IA - Base Styles */

:root {
  /* Colors */
  --navy: #2B80ED;
  --navy-dark: #1E52B0;
  --navy-light: #3b8ded;
  --navy-tint: #E4ECFB;

  --bg: #FAFAFA;
  --surface: #FFFFFF;
  --border: #E3DED2;
  --text: #0B1F3A;
  --text-soft: #6B7078;
  --text-muted: #999;

  --accent: #C97B5C;
  --accent-dark: #A85D40;

  /* Typography */
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: ui-monospace, "SF Mono", "Monaco", monospace;

  /* Spacing */
  --radius: 8px;
  --radius-lg: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1419;
    --surface: #1A1E27;
    --border: #2E3139;
    --text: #E0E0E0;
    --text-soft: #A0A0A0;
    --text-muted: #666;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

a {
  color: var(--navy);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--navy-dark);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--navy);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn:hover {
  background-color: var(--navy-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(43, 128, 237, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--navy);
  border: 2px solid var(--navy);
}

.btn-secondary:hover {
  background-color: var(--navy-tint);
}

/* Grid */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Cards */
.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  border-color: var(--navy-light);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--navy);
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-soft);
  line-height: 1.6;
}

.card-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--navy);
  font-weight: 600;
  text-decoration: underline;
}

/* Utilities */
.text-center {
  text-align: center;
}

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

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.flex {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Animations */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fade-in-up 0.6s ease-out;
}

/* Responsive */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }

  .container {
    padding: 0 1.5rem;
  }

  .grid {
    gap: 1.5rem;
  }
}