:root {
  --bg: #ffffff;
  --primary: rgba(24, 47, 92, 1);
  --text: #333333;
  --card-bg: #f8f9fa;
  --btn-bg: var(--primary);
  --btn-hover: rgba(80, 140, 200, 1);
}
* { box-sizing: border-box; margin:0; padding:0; }
body { font-family:'Segoe UI',sans-serif; background:var(--bg); color:var(--text); line-height:1.6; }

nav {
  position:fixed; top:0; width:100%; padding:20px;
  background:rgba(255,255,255,0.9); backdrop-filter:blur(10px);
  display:flex; justify-content:space-between; align-items:center; z-index:10;
}
nav .brand { font-size:1.6rem; color:var(--primary); font-weight:700; }
nav a {
  margin-left:20px; color:var(--text); text-decoration:none; font-weight:500;
  transition:color .3s;
}
nav a:hover { color:var(--primary); }

.hero {
  padding:120px 20px 60px; text-align:center;
  background:url('https://via.placeholder.com/1600x900') center/cover no-repeat;
  background-size:cover;
}
.hero h1 { font-size:3rem; color:var(--primary); }
.hero .search-bar { margin:20px auto; display:inline-flex; }
.hero .search-bar input {
  padding:12px 20px; width:280px; border:1px solid var(--primary);
  border-radius:30px 0 0 30px;
}
.hero .search-bar button {
  padding:12px 20px; border:none; background:var(--btn-bg);
  color:white; border-radius:0 30px 30px 0; cursor:pointer;
  transition:background .3s;
}
.hero .search-bar button:hover { background:var(--btn-hover); }
.hero .hero-btn {
  margin-top:20px; padding:14px 32px; background:var(--btn-bg);
  color:white; border:none; border-radius:30px; font-size:1.1rem;
  cursor:pointer; transition:background .3s;
}
.hero .hero-btn:hover { background:var(--btn-hover); }

.filters-container {
  background:var(--card-bg); padding:20px; margin:40px auto;
  max-width:1200px; border-radius:10px;
  box-shadow:0 4px 10px rgba(0,0,0,0.05);
}
.filter-title { font-size:1.4rem; color:var(--primary); margin-bottom:15px; }
.filter-group { margin-bottom:15px; }
.filter-group h5 { margin-bottom:8px; color:var(--text); }
.filter-options {
  display:flex; flex-wrap:wrap; gap:10px;
}
.filter-btn {
  padding:8px 16px; border:none; border-radius:20px;
  background:rgba(80,140,200,0.2); color:var(--text);
  cursor:pointer; transition:background .3s, transform .2s;
}
.filter-btn.active,
.filter-btn:hover {
  background:var(--btn-bg); color:white;
  transform:scale(1.05);
}

.doctors {
  padding:40px 20px;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:20px;
  max-width:1200px;
  margin:auto;
}
.card {
  background:var(--card-bg); border-radius:10px;
  overflow:hidden; box-shadow:0 4px 12px rgba(0,0,0,0.05);
  transition:transform .3s;
}
.card:hover { transform:translateY(-4px); }
.card img {
  width:100%; aspect-ratio:4/3; object-fit:cover;
}
.card-content {
  padding:15px;
}
.card-content h3 { color:var(--primary); margin-bottom:6px; }
.card-content p { font-size:0.9rem; margin-bottom:12px; }
.card-content button {
  padding:8px 16px; border:none;
  background:var(--btn-bg); color:white; border-radius:20px;
  cursor:pointer; transition:background .3s;
}
.card-content button:hover { background:var(--btn-hover); }

footer {
  padding:30px; text-align:center;
  background:var(--card-bg); border-top:1px solid rgba(0,0,0,0.1);
}
footer a {
  color:var(--primary); text-decoration:none; margin:0 8px;
}
footer a:hover { text-decoration:underline; }

@media(max-width:768px) {
  nav { padding:15px; }
  .hero h1 { font-size:2.4rem; }
}
/* Estilo del modal (fondo oscuro semitransparente) */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background-color: rgba(0,0,0,0.5);
}
/* Contenido del modal */
.modal-content {
  background-color: white;
  margin: 80px auto;
  padding: 20px;
  border-radius: 10px;
  width: 90%; max-width: 600px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
/* Botón cerrar */
.close {
  color: #333;
  float: right;
  font-size: 24px;
  font-weight: 600;
  cursor: pointer;
}
.close:hover {
  color: #000;
}
.btn-agendar {
  display: inline-block;
  margin-top: 15px;
  padding: 12px 24px;
  background: var(--btn-bg);
  color: white;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s;
}
.btn-agendar:hover {
  background: var(--btn-hover);
}
    .bg-light {
    background-color: #f8f9fa;
    }