body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(to right, #1e293b, #0f172a); /* Gradient gelap */
  color: white;
  min-height: 100vh;
}

.input-bbfs {
  width: 50px;
  height: 50px;
  text-align: center;
  font-size: 1.5rem;
  border-radius: 0.5rem;
  border: 2px solid #ffffff;
  background-color: #ffffff;
  color: #000000;
  transition: 0.3s ease;
}

.input-bbfs:focus {
  outline: 2px solid #6366f1;
  border-color: #6366f1;
}

.input-bbfs::placeholder {
  color: #888;
  font-size: 1rem;
}


.btn {
  background-color: #6366f1;
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: 0.5rem;
  font-weight: 600;
  transition: background 0.3s;
}

.btn:hover {
  background-color: #4f46e5;
}

.card {
  background-color: #1f2937;
  padding: 1.5rem;
  border-radius: 1rem;
  text-align: center;
  box-shadow: 0 0 10px rgba(0,0,0,0.4);
}

.card h2 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #a5b4fc;
}

.angka {
  font-size: 2rem;
  font-weight: bold;
  color: #facc15;
}

a.btn-back {
  background-color: #6366f1;
  padding: 0.6rem 1.2rem;
  border-radius: 0.5rem;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 0 10px #6366f1aa;
  transition: background 0.3s;
}

a.btn-back:hover {
  background-color: #4f46e5;
}

.glass-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  }
  .glass-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.5);
  }
  body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
  }
  .input-bbfs {
    width: 50px;
    height: 50px;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    color: white;
    font-size: 20px;
    font-weight: bold;
  }
  .input-bbfs:focus {
    outline: none;
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
  }
  .btn {
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
  }
  .card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
  }
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(31, 38, 135, 0.4);
  }
  .angka {
    font-size: 24px;
    font-weight: bold;
    color: #ffffff;
    margin-top: 10px;
  }
  .pulse {
    animation: pulse 2s infinite;
  }
  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }

  /* Styling untuk tombol AI */
  .btn-ai {
    position: relative;
    overflow: hidden;
  }
  
  .btn-ai::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
  }
  
  .btn-ai:hover::before {
    left: 100%;
  }
  
  /* Notifikasi AI */
  .ai-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #8b5cf6, #a855f7);
    color: white;
    padding: 16px 20px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
    z-index: 1000;
    animation: slideInRight 0.5s ease, fadeOut 0.5s ease 3.5s;
    max-width: 300px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
  }
  
  .ai-content {
    font-size: 14px;
    line-height: 1.4;
  }
  
  @keyframes slideInRight {
    from {
      transform: translateX(100%);
      opacity: 0;
    }
    to {
      transform: translateX(0);
      opacity: 1;
    }
  }
  
  @keyframes fadeOut {
    from {
      opacity: 1;
    }
    to {
      opacity: 0;
      transform: translateX(100%);
    }
  }
  
  /* Responsive untuk mobile */
  @media (max-width: 640px) {
    .ai-notification {
      top: 10px;
      right: 10px;
      left: 10px;
      max-width: none;
    }
  }