/* ---------- RESET & BASE (modern, dark, startup-style) ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-deep: #0a0c10;
  --bg-surface: #111317;
  --card-bg: #161a22;
  --card-border: #262c38;
  --text-primary: #f0f3f8;
  --text-secondary: #a9b3c9;
  --text-muted: #6c7a91;
  --accent: #4f9eff;
  --accent-glow: rgba(79, 158, 255, 0.2);
  --accent-hover: #7bb3ff;
  --transition-smooth: all 0.25s cubic-bezier(0.2, 0, 0, 1);
  --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 16px 28px -8px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(79, 158, 255, 0.2);
  --border-radius-card: 1.25rem;
  --border-radius-element: 0.75rem;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, 'Segoe UI', 'Inter', 'Helvetica Neue', sans-serif;
  line-height: 1.5;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

/* tipografía clara y jerarquía */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  background: linear-gradient(135deg, #ffffff 0%, #c0d9ff 100%);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
  border-left: 4px solid var(--accent);
  padding-left: 1rem;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-smooth);
}

/* layout contenedor */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------- NAVBAR (modern, sticky, elegante) ---------- */
.navbar {
  background: rgba(10, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(38, 44, 56, 0.6);
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 1.5rem;
  max-width: 1280px;
  margin: 0 auto;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(120deg, #fff, var(--accent));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  transition: var(--transition-smooth);
}

.logo:hover {
  opacity: 0.85;
}

.nav-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  font-weight: 500;
}

.nav-links a {
  font-size: 1rem;
  position: relative;
  padding-bottom: 0.25rem;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.25s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover {
  color: var(--accent);
}

/* hero section (startup vibe) */
.hero {
  padding: 4rem 0 3rem 0;
  text-align: center;
}

.hero p {
  font-size: clamp(1rem, 3vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: rgba(79, 158, 255, 0.12);
  backdrop-filter: blur(4px);
  padding: 0.4rem 1rem;
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1.5rem;
  border: 1px solid rgba(79, 158, 255, 0.2);
}

/* sección posts (cards grid) */
.posts-section {
  padding: 2rem 0 4rem 0;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

/* cards elegantes con hover suave */
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-card);
  padding: 1.75rem;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
  backdrop-filter: blur(2px);
}

.post-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
  background: #181e28;
}

.card-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(79, 158, 255, 0.1);
  padding: 0.25rem 0.9rem;
  border-radius: 40px;
  width: fit-content;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.01em;
  border: 0.5px solid rgba(79, 158, 255, 0.3);
}

.post-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  border-bottom: 1px dashed #2a2f3c;
  padding-bottom: 0.75rem;
}

.post-excerpt {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex: 1;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--accent);
  transition: var(--transition-smooth);
  margin-top: 0.5rem;
}

.read-more:hover {
  gap: 0.75rem;
  color: var(--accent-hover);
}

/* estilo para el contenido de los posts individuales */
.post-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}

.post-content h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.post-content h3 {
  font-size: 1.4rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--accent);
}

.post-content p {
  margin-bottom: 1.2rem;
  color: var(--text-secondary);
}

.post-content ul, .post-content ol {
  margin: 1rem 0 1.5rem 1.8rem;
  color: var(--text-secondary);
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content .cta-box {
  background: rgba(79, 158, 255, 0.08);
  border-left: 4px solid var(--accent);
  padding: 1.5rem;
  border-radius: 1rem;
  margin: 2rem 0;
  text-align: center;
}

/* footer simple y elegante */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid #1e232e;
  margin-top: 3rem;
  padding: 2.5rem 0 2rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* responsive */
@media (max-width: 680px) {
  .nav-container {
    flex-direction: column;
    align-items: center;
  }
  .nav-links {
    gap: 1.2rem;
    justify-content: center;
  }
  .hero {
    padding: 2rem 0 2rem;
  }
  .cards-grid {
    gap: 1.5rem;
  }
  .post-card {
    padding: 1.25rem;
  }
  .container {
    padding: 0 1.2rem;
  }
}

::selection {
  background: var(--accent);
  color: #0a0c10;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #111317;
}
::-webkit-scrollbar-thumb {
  background: #2e3a48;
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}