:root {
  --primary: #1e293b;
  --accent: #00a896;
  --accent-hover: #028090;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --whatsapp: #25d366;
  --border-radius: 16px;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-bottom: 80px; 
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Encabezado */
header {
  background: var(--card-bg);
  padding: 1rem 2rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand { display: flex; align-items: center; text-decoration: none; }
.brand-title { font-size: 1.35rem; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; }
.brand-tagline { font-size: 0.8rem; color: var(--text-muted); }

/* Navegación Escritorio */
nav.desktop-nav { display: flex; align-items: center; gap: 0.5rem; }
nav.desktop-nav button, nav.desktop-nav a.nav-btn {
  background: none; border: none; font-size: 0.95rem; font-weight: 600;
  color: var(--text-muted); cursor: pointer; padding: 0.5rem 1rem;
  border-radius: 8px; transition: all 0.2s ease; text-decoration: none;
  display: inline-flex; align-items: center; gap: 4px;
}
nav.desktop-nav button.active, nav.desktop-nav button:hover, nav.desktop-nav a.nav-btn:hover {
  color: var(--accent); background: #eef9f8;
}

/* Contenedor Principal */
.container {
  flex: 1;
  width: 100%;
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.view-section { display: none; }
.view-section.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

/* Botones Principales */
.btn-primary {
  background-color: var(--accent); color: white; border: none;
  padding: 0.75rem 1.4rem; font-weight: 700; border-radius: 30px;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 0.5rem;
  transition: background 0.2s ease;
}
.btn-primary:hover { background-color: var(--accent-hover); }

/* Grilla de Tarjetas */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; margin-top: 1rem; }
.card {
  background: var(--card-bg); border-radius: var(--border-radius); padding: 1.5rem;
  box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s;
  display: flex; flex-direction: column; justify-content: space-between;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 15px 30px rgba(0,0,0,0.07); }
.card-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.card-badge {
  align-self: flex-start; background: #eef9f8; color: var(--accent);
  font-size: 0.75rem; font-weight: 700; padding: 0.3rem 0.8rem;
  border-radius: 12px; margin-bottom: 0.8rem;
}
.card h3 { margin-bottom: 0.5rem; color: var(--primary); font-size: 1.15rem; }
.card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.2rem; }

/* Estilos específicos de la sección de tests */
.test-banner {
  background: #dc2626;
  color: white;
  text-align: center;
  padding: 1.2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}
.test-banner h1 { font-size: 1.4rem; margin-bottom: 0.3rem; }
.test-banner p { font-size: 0.95rem; opacity: 0.95; }

.test-container {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
  display: none;
}
.test-container.active { display: block; animation: fadeIn 0.3s ease; }

.question-box { 
  margin-bottom: 1.2rem; 
  background: #f8fafc; 
  padding: 1rem; 
  border-radius: 8px; 
  border: 1px solid #cbd5e1; 
}
.question-box p { font-weight: 600; font-size: 0.9rem; margin-bottom: 8px; color: var(--text); }

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 0.6rem;
}
.option-btn, select.option-btn {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  text-align: left;
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  width: 100%;
  transition: all 0.2s;
}
.option-btn:hover { background: #e2e8f0; border-color: var(--accent); }

.result-box {
  background: #f1f5f9;
  padding: 1.5rem;
  border-radius: 12px;
  border-left: 5px solid var(--accent);
  margin-top: 1.5rem;
  display: none;
}

/* Footer Legal */
footer {
  background: var(--card-bg); 
  border-top: 1px solid #e2e8f0;
  padding: 0.8rem 1.5rem; 
  margin-top: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 8px;
  margin-bottom: 0.2rem;
  text-align: center;
  width: 100%;
}