/* ===== Estilo base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", system-ui, sans-serif;
  scroll-behavior: smooth;
}
#video-fondo {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  z-index: -1;
  background-size: cover;
  filter: brightness(40%); /* oscurece un poco para que el texto se lea bien */
  object-fit: cover;
}


body {
  background: #f8f9fb;
  color: #1a1a1a;
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.4s, color 0.4s;
}

/* ===== Animaciones globales ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Encabezado ===== */
header {
  text-align: center;
  padding: 90px 20px 60px;
  background: linear-gradient(145deg, #ffffff, #f0f2f5);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  animation: fadeInUp 0.8s ease-out;
}

header h1 {
  font-size: 3rem;
  font-weight: 700;
  color: #0b0b0b;
  letter-spacing: -0.5px;
}

header p {
  font-size: 1.2rem;
  color: #555;
  margin-top: 12px;
}

/* ===== Secciones generales ===== */
section {
  max-width: 1000px;
  margin: 80px auto;
  padding: 0 20px;
  animation: fadeInUp 1s ease-out;
}

section h2 {
  font-size: 2rem;
  margin-bottom: 25px;
  color: #0b0b0b;
  position: relative;
  font-weight: 600;
  letter-spacing: -0.5px;
}

section h2::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, #007aff, #00b4d8);
}

section p {
  font-size: 1.05rem;
  color: #333;
}

/* ===== Herramientas / Skills ===== */
.skills .tools {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-top: 25px;
}

.tools span {
  background: #fff;
  border: 1px solid #e3e3e3;
  border-radius: 50px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 500;
  color: #333;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.tools span:hover {
  background: linear-gradient(135deg, #007aff, #00b4d8);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 122, 255, 0.25);
}

/* ===== Proyectos ===== */
.project-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.07);
  overflow: hidden;
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  transition: all 0.4s ease;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.project-card img {
  width: 100%;
  max-height: 250px;
  object-fit: contain;
  background: #f9f9f9;
  padding: 40px;
  transition: transform 0.3s ease;
}

.project-card:hover img {
  transform: scale(1.04);
}

.project-info {
  padding: 35px;
}

.project-info h3 {
  font-size: 1.6rem;
  color: #0b0b0b;
  margin-bottom: 15px;
  font-weight: 600;
}

.project-info p {
  color: #444;
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ===== Botón PDF ===== */
.pdf-link {
  display: inline-block;
  margin: 60px auto;
  padding: 14px 36px;
  background: linear-gradient(135deg, #007aff, #00b4d8);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 500;
  border-radius: 50px;
  text-decoration: none;
  text-align: center;
  transition: all 0.4s ease;
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.3);
}

.pdf-link:hover {
  transform: translateY(-4px);
  background: linear-gradient(135deg, #005fd1, #0090c1);
  box-shadow: 0 8px 30px rgba(0, 122, 255, 0.45);
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 60px 20px;
  font-size: 0.95rem;
  color: #666;
  background: #f4f4f4;
  margin-top: 100px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* ===== Modo oscuro automático ===== */
@media (prefers-color-scheme: dark) {
  body {
    background: #0d1117;
    color: #e6edf3;
  }

  header {
    background: linear-gradient(145deg, #161b22, #0d1117);
  }

  header h1 {
    color: #f2f6fc; /* blanco suave */
  }

  header p {
    color: #c9d1d9;
  }

  section h2 {
    color: #e6edf3; /* gris claro legible */
  }

  section p {
    color: #c9d1d9; /* gris claro */
  }

  section h2::after {
    background: linear-gradient(90deg, #007aff, #00b4d8);
  }

  .tools span {
    background: #161b22;
    border: 1px solid #222;
    color: #e6edf3; /* texto claro */
  }

  .project-card {
    background: #161b22;
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.05);
  }

  .project-info h3 {
    color: #f0f6fc; /* título claro */
  }

  .project-info p {
    color: #c9d1d9;
  }

  .pdf-link {
    background: linear-gradient(135deg, #007aff, #00b4d8);
  }

  footer {
    background: #161b22;
    color: #aaa;
    border-top: 1px solid #222;
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  header h1 {
    font-size: 2.2rem;
  }

  section h2 {
    font-size: 1.6rem;
  }

  .project-info {
    padding: 25px;
  }

  .pdf-link {
    margin: 40px auto;
    font-size: 0.95rem;
    padding: 12px 28px;
  }
}