/* Shell visual alineado con login_accordion (páginas públicas: activación acudiente) */
:root {
  --primary-color: #007bff;
  --accent-color: #4e54c8;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --card-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  --card-shadow-hover: 0 15px 30px rgba(0, 0, 0, 0.15);
  --transition-speed: 0.3s;
}
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  overflow-x: hidden;
  background-color: var(--light-color);
}
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 0;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  pointer-events: none;
}
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
  position: relative;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}
.page-wrapper.loaded { opacity: 1; }
.login-container {
  max-width: 1000px;
  margin: 0 auto;
  background-color: rgba(255, 255, 255, 0.4);
  border-radius: 20px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  backdrop-filter: blur(3px);
}
.login-header {
  position: relative;
  padding: 20px;
  background: linear-gradient(to right, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0.35));
  display: flex;
  flex-direction: column;
  align-items: center;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.logos-container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 15px;
  margin-bottom: 15px;
}
.silerni-logo { height: 50px; transition: all var(--transition-speed) ease; }
.college-logo { height: 100px; transition: all var(--transition-speed) ease; }
.platform-title {
  text-align: center;
  margin-bottom: 12px;
  color: var(--dark-color);
  font-weight: 600;
  text-shadow: 0 1px 3px rgba(255, 255, 255, 0.7);
  font-size: 1.35rem;
}
.login-content { padding: 30px; }
.description-container {
  background-color: rgba(248, 249, 250, 0.3);
  padding: 20px;
  border-radius: 15px;
  margin-bottom: 24px;
  text-align: center;
  border-left: 5px solid var(--primary-color);
  backdrop-filter: blur(2px);
}
.description-container h4 { color: var(--dark-color); margin-bottom: 8px; }
.login-card {
  background-color: rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(2px);
  border-radius: 15px;
  box-shadow: var(--card-shadow);
  padding: 30px;
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.login-card h3 {
  color: var(--primary-color);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  font-weight: 700;
}
.login-card h3 i { margin-right: 10px; color: var(--accent-color); }
.form-control {
  border-radius: 10px;
  padding: 12px 15px;
  height: auto;
  border: 1px solid #ced4da;
  transition: all var(--transition-speed) ease;
  font-size: 16px;
  background-color: rgba(255, 255, 255, 0.85);
}
.form-control:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 0.2rem rgba(78, 84, 200, 0.25);
  background-color: rgba(255, 255, 255, 0.95);
}
.input-group-text {
  border-radius: 10px 0 0 10px;
  background-color: var(--light-color);
  border-right: none;
}
.input-group .form-control {
  border-left: none;
  border-radius: 0 10px 10px 0;
}
.btn-login {
  background: linear-gradient(to right, var(--primary-color), var(--accent-color));
  color: white;
  border: none;
  border-radius: 10px;
  padding: 12px 20px;
  font-size: 18px;
  font-weight: 500;
  box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
}
.btn-login:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 123, 255, 0.4);
}
.footer {
  text-align: center;
  padding: 15px;
  color: #6c757d;
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: rgba(248, 249, 250, 0.3);
  border-top: 1px solid rgba(0,0,0,0.05);
}
.footer img { height: 40px; margin-bottom: 10px; }
.form-label { font-weight: 600; }
@media (max-width: 768px) {
  .login-container { margin: 15px; }
  .logos-container { flex-direction: column; gap: 16px; }
  .login-content { padding: 20px 15px; }
}