* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 20px;
      position: relative;
      overflow: hidden;
    }

    /* Animated background particles */
    body::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="25" cy="25" r="2" fill="rgba(255,255,255,0.1)"><animate attributeName="r" values="2;4;2" dur="3s" repeatCount="indefinite"/></circle><circle cx="75" cy="75" r="3" fill="rgba(255,255,255,0.15)"><animate attributeName="r" values="3;6;3" dur="4s" repeatCount="indefinite"/></circle><circle cx="50" cy="10" r="1" fill="rgba(255,255,255,0.2)"><animate attributeName="r" values="1;3;1" dur="2s" repeatCount="indefinite"/></circle></svg>') repeat;
      animation: float 20s linear infinite;
    }

    @keyframes float {
      0% { transform: translateY(0px) rotate(0deg); }
      100% { transform: translateY(-100vh) rotate(360deg); }
    }

    .login-container {
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 24px;
      padding: 50px 40px;
      width: 100%;
      max-width: 420px;
      box-shadow: 
        0 25px 45px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
      position: relative;
      z-index: 1;
      animation: slideUp 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }

    @keyframes slideUp {
      from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    h1 {
      text-align: center;
      color: white;
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 10px;
      text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
      background: linear-gradient(135deg, #fff 0%, #f8f9ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .subtitle {
      text-align: center;
      color: rgba(255, 255, 255, 0.8);
      font-size: 1rem;
      margin-bottom: 40px;
      font-weight: 400;
    }

    .input-group {
      position: relative;
      margin-bottom: 25px;
    }

    .input-group input {
      width: 100%;
      padding: 18px 24px;
      border: 2px solid rgba(255, 255, 255, 0.2);
      border-radius: 16px;
      font-size: 1.1rem;
      background: rgba(255, 255, 255, 0.1);
      color: white;
      transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      backdrop-filter: blur(10px);
    }

    .input-group input::placeholder {
      color: rgba(255, 255, 255, 0.6);
      font-weight: 400;
    }

    .input-group input:focus {
      outline: none;
      border-color: rgba(255, 255, 255, 0.6);
      background: rgba(255, 255, 255, 0.15);
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    }

    .input-group input:valid {
      border-color: rgba(72, 187, 120, 0.8);
    }

    .input-group input:invalid:not(:placeholder-shown) {
      border-color: rgba(245, 101, 101, 0.8);
    }

    /* Floating label effect */
    .input-group label {
      position: absolute;
      left: 24px;
      top: 50%;
      transform: translateY(-50%);
      color: rgba(255, 255, 255, 0.6);
      font-size: 1.1rem;
      pointer-events: none;
      transition: all 0.3s ease;
    }

    .input-group input:focus + label,
    .input-group input:not(:placeholder-shown) + label {
      top: -10px;
      left: 16px;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.9);
      background: rgba(103, 126, 234, 0.8);
      padding: 4px 8px;
      border-radius: 8px;
    }

    .otp-container {
      display: flex;
      gap: 12px;
      justify-content: center;
      margin: 20px 0;
    }

    .otp-input {
      width: 50px !important;
      height: 50px;
      text-align: center;
      font-size: 1.5rem !important;
      font-weight: 700;
      border-radius: 12px !important;
      padding: 0 !important;
    }

    .remember-forgot {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin: 30px 0;
      font-size: 0.95rem;
    }

    .remember-forgot label {
      display: flex;
      align-items: center;
      color: rgba(255, 255, 255, 0.8);
      cursor: pointer;
      transition: color 0.3s ease;
    }

    .remember-forgot label:hover {
      color: white;
    }

    .remember-forgot input[type="checkbox"] {
      margin-right: 8px;
      transform: scale(1.2);
      accent-color: #667eea;
    }

    .remember-forgot a {
      color: rgba(255, 255, 255, 0.8);
      text-decoration: none;
      transition: all 0.3s ease;
      position: relative;
    }

    .remember-forgot a::after {
      content: '';
      position: absolute;
      width: 0;
      height: 2px;
      bottom: -2px;
      left: 0;
      background: white;
      transition: width 0.3s ease;
    }

    .remember-forgot a:hover {
      color: white;
    }

    .remember-forgot a:hover::after {
      width: 100%;
    }

    .btn-container {
      margin-top: 35px;
    }

    button {
      width: 100%;
      padding: 18px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      border: none;
      border-radius: 16px;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
      position: relative;
      overflow: hidden;
    }

    button::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.6s;
    }

    button:hover {
      transform: translateY(-3px);
      box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
    }

    button:hover::before {
      left: 100%;
    }

    button:active {
      transform: translateY(-1px);
    }

    .send-otp-btn {
      background: rgba(255, 255, 255, 0.2);
      color: white;
      border: 1px solid rgba(255, 255, 255, 0.3);
      padding: 12px 20px;
      border-radius: 12px;
      font-size: 0.9rem;
      margin-top: 10px;
      width: auto;
      float: right;
    }

    .send-otp-btn:hover {
      background: rgba(255, 255, 255, 0.3);
      transform: translateY(-2px);
    }

    .timer {
      color: rgba(255, 255, 255, 0.7);
      font-size: 0.9rem;
      text-align: center;
      margin-top: 15px;
    }

    .success-animation {
      animation: successPulse 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }

    @keyframes successPulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    .shake {
      animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97);
    }

    @keyframes shake {
      10%, 90% { transform: translate3d(-1px, 0, 0); }
      20%, 80% { transform: translate3d(2px, 0, 0); }
      30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
      40%, 60% { transform: translate3d(4px, 0, 0); }
    }

    /* Mobile responsiveness */
    @media (max-width: 480px) {
      .login-container {
        padding: 40px 25px;
        margin: 10px;
      }
      
      h1 {
        font-size: 2rem;
      }
      
      .otp-input {
        width: 45px !important;
        height: 45px;
      }
      
      .remember-forgot {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
      }
    }

    /* Loading state */
    .loading {
      position: relative;
      color: transparent;
    }

    .loading::after {
      content: '';
      position: absolute;
      width: 20px;
      height: 20px;
      top: 50%;
      left: 50%;
      margin-left: -10px;
      margin-top: -10px;
      border: 2px solid rgba(255, 255, 255, 0.3);
      border-radius: 50%;
      border-top-color: white;
      animation: spin 1s linear infinite;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }