:root {
  --turquesa: #1AB394;
  --turquesa-dark: #159378;
  --gris-oscuro: #2D2D2D;
  --gris: #4A4A4A;
  --gris-claro: #F5F5F5;
  --blanco: #FFFFFF;
  --sombra: 0 2px 16px rgba(0,0,0,0.08);
  --radio: 8px;
  --max-ancho: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--gris-oscuro);
  line-height: 1.6;
  background: var(--blanco);
}

img { max-width: 100%; display: block; }
a { color: var(--turquesa-dark); text-decoration: none; }

.container { max-width: var(--max-ancho); margin: 0 auto; padding: 0 24px; }

/* NAV */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
nav .logo { height: 32px; }
nav ul { display: flex; list-style: none; gap: 32px; }
nav ul a { color: var(--gris); font-size: 0.9rem; font-weight: 500; transition: color 0.2s; }
nav ul a:hover { color: var(--turquesa); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--gris-oscuro); margin: 5px 0; transition: 0.3s; }

/* HERO */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(160deg, var(--gris-claro) 0%, var(--blanco) 100%);
}
.hero .container {
  display: flex; align-items: center; gap: 60px;
}
.hero-text { flex: 1; }
.hero-text h1 { font-size: 2.4rem; line-height: 1.2; margin-bottom: 20px; color: var(--gris-oscuro); }
.hero-text p { font-size: 1.15rem; color: var(--gris); margin-bottom: 32px; max-width: 540px; }
.hero-foto {
  width: 280px; height: 280px; border-radius: 50%; object-fit: cover;
  border: 4px solid var(--turquesa);
  flex-shrink: 0;
}
.btn {
  display: inline-block; padding: 14px 32px;
  background: var(--turquesa); color: var(--blanco);
  font-weight: 600; font-size: 1rem; border-radius: var(--radio);
  transition: background 0.2s, transform 0.2s; border: none; cursor: pointer;
}
.btn:hover { background: var(--turquesa-dark); transform: translateY(-1px); }
.btn-outline {
  background: transparent; color: var(--turquesa); border: 2px solid var(--turquesa);
}
.btn-outline:hover { background: var(--turquesa); color: var(--blanco); }

/* SECCIONES */
section { padding: 80px 0; }
section:nth-child(even) { background: var(--gris-claro); }
.section-title { font-size: 1.8rem; margin-bottom: 12px; }
.section-subtitle { color: var(--gris); margin-bottom: 48px; font-size: 1.05rem; }

/* QUIEN SOY */
.sobre-mi p { font-size: 1.05rem; color: var(--gris); max-width: 700px; line-height: 1.8; }

/* SERVICIOS */
.servicios-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.servicio-card {
  background: var(--blanco); padding: 40px; border-radius: var(--radio);
  box-shadow: var(--sombra); border-top: 3px solid var(--turquesa);
}
.servicio-card h3 { font-size: 1.2rem; margin-bottom: 12px; }
.servicio-card p { color: var(--gris); }

/* PROYECTOS */
.proyectos-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.proyecto-card {
  background: var(--blanco); border-radius: var(--radio);
  box-shadow: var(--sombra); overflow: hidden;
  display: flex; flex-direction: column; transition: transform 0.2s, box-shadow 0.2s;
}
.proyecto-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.proyecto-card-img {
  width: 100%; height: 180px; object-fit: cover; object-position: top left;
  border-bottom: 1px solid #eee;
}
.proyecto-card-body { padding: 28px 24px; display: flex; flex-direction: column; flex: 1; }
.proyecto-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.proyecto-card p { color: var(--gris); font-size: 0.95rem; flex: 1; margin-bottom: 20px; }
.proyecto-card .btn { text-align: center; font-size: 0.9rem; padding: 10px 20px; }

/* CONTACTO */
.contacto-form {
  max-width: 560px;
}
.contacto-form input,
.contacto-form textarea {
  width: 100%; padding: 14px 16px; border: 1px solid #ddd;
  border-radius: var(--radio); font-size: 1rem; font-family: inherit;
  margin-bottom: 16px; transition: border-color 0.2s;
}
.contacto-form input:focus,
.contacto-form textarea:focus { outline: none; border-color: var(--turquesa); }
.contacto-form textarea { min-height: 140px; resize: vertical; }
.contacto-linkedin { margin-top: 24px; display: flex; align-items: center; gap: 8px; color: var(--gris); }
.contacto-linkedin a { font-weight: 500; }

/* FOOTER */
footer {
  background: var(--gris-oscuro); color: rgba(255,255,255,0.6);
  padding: 32px 0; text-align: center; font-size: 0.85rem;
}
footer .logo-footer { height: 28px; margin: 0 auto 12px; opacity: 0.8; }

/* CASO PAGE */
.caso-header {
  padding: 120px 0 60px;
  background: linear-gradient(160deg, var(--gris-claro) 0%, var(--blanco) 100%);
}
.caso-header h1 { font-size: 2.2rem; margin-bottom: 12px; }
.caso-header .subtitulo { font-size: 1.15rem; color: var(--gris); max-width: 700px; }
.caso-body { padding: 60px 0; }
.caso-body .container { max-width: 820px; }
.caso-body h2 { font-size: 1.5rem; margin: 48px 0 16px; color: var(--gris-oscuro); }
.caso-body h2:first-child { margin-top: 0; }
.caso-body p { color: var(--gris); margin-bottom: 16px; line-height: 1.8; }
.caso-body ul { color: var(--gris); margin: 0 0 16px 20px; line-height: 1.8; }
.caso-metricas {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px; margin: 32px 0;
}
.metrica {
  background: var(--gris-claro); padding: 24px; border-radius: var(--radio);
  text-align: center; border-left: 3px solid var(--turquesa);
}
.metrica .valor { font-size: 1.8rem; font-weight: 700; color: var(--turquesa); }
.metrica .label { font-size: 0.85rem; color: var(--gris); margin-top: 4px; }
.stack-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.stack-table td { padding: 12px 16px; border-bottom: 1px solid #eee; }
.stack-table td:first-child { font-weight: 600; white-space: nowrap; width: 180px; }
.stack-table td:last-child { color: var(--gris); }
.caso-nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 40px 0; border-top: 1px solid #eee; margin-top: 40px;
}

/* CAPTURAS CASO */
.caso-screenshot {
  margin: 28px 0; border-radius: var(--radio);
  box-shadow: 0 2px 20px rgba(0,0,0,0.1); border: 1px solid #e5e5e5;
}
.caso-screenshot-caption {
  font-size: 0.85rem; color: var(--gris); text-align: center;
  margin: -16px 0 28px; font-style: italic;
}
.caso-screenshots-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 28px 0;
}
.caso-screenshots-grid .screenshot-item { text-align: center; }
.caso-screenshots-grid img {
  border-radius: var(--radio); box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  border: 1px solid #e5e5e5;
}
.caso-screenshots-grid .screenshot-label {
  font-size: 0.8rem; color: var(--gris); margin-top: 8px; font-weight: 500;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero .container { flex-direction: column-reverse; text-align: center; }
  .hero-text h1 { font-size: 1.8rem; }
  .hero-text p { margin: 0 auto 24px; }
  .hero-foto { width: 200px; height: 200px; }
  .servicios-grid { grid-template-columns: 1fr; }
  .proyectos-grid { grid-template-columns: 1fr; }
  nav ul { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--blanco); flex-direction: column; padding: 20px 24px; gap: 16px; box-shadow: var(--sombra); }
  nav ul.active { display: flex; }
  .nav-toggle { display: block; }
  .caso-metricas { grid-template-columns: 1fr 1fr; }
}