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

/*Variables*/
:root {
  --primary-color: #8957E5;
  /* violeta */
  --background-color: #010409;
  /* azul oscuro */
  --card-background: #0D1117;
  /* gris oscuro */
  --text-color: #f7faff;
  --secondary-text: #b1b1b3;
}

/* Animación de entrada */
.container {
  animation: fadeIn 0.8s ease-in-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body {
  font-family: 'Segoe UI', 'Inter', Arial, sans-serif;
  background: linear-gradient(180deg, #0D1117, #010409);
  color: var(--text-color);
  margin: 0;
  font-size: 16px;
}

.container {
  max-width: 900px;
  margin: 60px auto;
  padding: 40px;
  background: var(--card-background);
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.lang-switch {
  position: absolute;
  top: 20px;
  right: 20px;
}

.lang-switch button {
  background: transparent;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  margin-left: 5px;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
}

.lang-switch button:hover {
  background: var(--primary-color);
  color: white;
}

.lang-switch button.active {
  background: var(--primary-color);
  color: white;
}

.lang {
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lang.visible {
  opacity: 1;
}

header {
  text-align: center;
  margin-bottom: 50px;
}

h1 {
  font-size: 34px;
  margin-bottom: 5px;
  letter-spacing: -0.5px;
}

h2 {
  font-size: 18px;
  color: var(--secondary-text);
  font-weight: 400;
}

.headline {
  margin-top: 15px;
  font-size: 15px;
  color: var(--secondary-text);
  text-align: center;
}

section {
  margin-bottom: 60px;
}

h3 {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary-color);
  margin-bottom: 20px;
}

p {
  color: var(--secondary-text);
  line-height: 1.7;
  font-size: 16px;
  margin-bottom: 16px;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

a:hover {
  color: #8957E5;
  text-decoration: underline;
}

hr {
  border: none;
  height: 1px;
  background: var(--secondary-text);
  margin: 30px 0;
}

section p+p {
  margin-top: 10px;
}

/* Proyectos más elegantes */
.projects {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-top: 20px;
}

.card {
  background: var(--card-background);
  padding: 24px;
  border-radius: 10px;
  transition: all 0.25s ease;
  border: 1px solid var(--secondary-text);
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-color);
  background-color: #8957e550;
}

.card h4 {
  margin: 10px 0 5px 0;
}

.card p {
  font-size: 15px;
  color: var(--secondary-text);
}

.card a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.icon {
  font-size: 22px;
  color: var(--primary-color);
}

.experience {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-top: 20px;
}

.exp-card {
  background: var(--card-background);
  padding: 24px;
  border-radius: 10px;
  border: 1px solid var(--secondary-text);
  transition: all 0.25s ease;
}

.exp-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-color);
  background-color: #8957e550;
}

.exp-card h4 {
  margin: 0;
  font-size: 18px;
}

.exp-card span {
  font-size: 13px;
  color: var(--primary-color);
}

.exp-card p {
  margin-top: 10px;
  font-size: 15px;
  color: var(--secondary-text);
}

.closing {
  text-align: center;
  color: var(--secondary-text);
  font-size: 14px;
  opacity: 0.8;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

/* Tablet: 600px – 768px */
@media (max-width: 768px) {
  .container {
    margin: 20px;
    padding: 28px 24px;
    border-radius: 10px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 16px;
  }

  h3 {
    font-size: 13px;
  }
  /* En tablet las cards bajan a 2 columnas automáticamente con auto-fit */
}

/* Mobile: hasta 480px — una sola columna */
@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .container {
    margin: 0;
    padding: 24px 18px;
    border-radius: 0;
    box-shadow: none;
  }

  h1 {
    font-size: 22px;
  }

  h2 {
    font-size: 15px;
  }

  .headline {
    font-size: 14px;
  }

  section {
    margin-bottom: 40px;
  }

  /* Cards en columna única en mobile */
  .projects,
  .experience {
    grid-template-columns: 1fr;
  }

  .card,
  .exp-card {
    padding: 18px;
  }

  /* El hover con transform puede ser molesto en touch — lo desactivamos */
  .card:hover,
  .exp-card:hover {
    transform: none;
  }

  p {
    font-size: 15px;
  }
}