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

    body, html {
      height: 100%;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 50%, #0f0f0f 100%);
      overflow-x: hidden;
    }

    /* Animated Background */
    .bg-animation {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -1;
      opacity: 0.1;
    }

    .bg-animation::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, #333 1px, transparent 1px);
      background-size: 50px 50px;
      animation: moveGrid 20s linear infinite;
    }

    @keyframes moveGrid {
      0% { transform: translate(0, 0); }
      100% { transform: translate(50px, 50px); }
    }

    /* Floating particles */
    .particles {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -1;
      pointer-events: none;
    }

    .particle {
      position: absolute;
      width: 6px;
      height: 6px;
      background: linear-gradient(45deg, rgba(79, 70, 229, 0.3), rgba(124, 58, 237, 0.3));
      border-radius: 50%;
      animation: float 8s ease-in-out infinite;
      box-shadow: 0 0 10px rgba(79, 70, 229, 0.3);
    }

    .particle:nth-child(1) { left: 10%; animation-delay: 0s; }
    .particle:nth-child(2) { left: 20%; animation-delay: 1s; }
    .particle:nth-child(3) { left: 30%; animation-delay: 2s; }
    .particle:nth-child(4) { left: 40%; animation-delay: 3s; }
    .particle:nth-child(5) { left: 50%; animation-delay: 4s; }
    .particle:nth-child(6) { left: 60%; animation-delay: 5s; }
    .particle:nth-child(7) { left: 70%; animation-delay: 0.5s; }
    .particle:nth-child(8) { left: 80%; animation-delay: 1.5s; }
    .particle:nth-child(9) { left: 90%; animation-delay: 2.5s; }

    @keyframes float {
      0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
      }
      10% { opacity: 0.7; }
      50% { opacity: 1; }
      90% { opacity: 0.7; }
    }

    .container {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
      position: relative;
    }

    .login-card {
      background: rgba(20, 20, 20, 0.95);
      backdrop-filter: blur(25px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 28px;
      padding: 50px 45px 45px;
      width: 100%;
      max-width: 460px;
      box-shadow:
        0 25px 70px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
      position: relative;
      animation: slideInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
      transform-style: preserve-3d;
    }

    @keyframes slideInUp {
      from {
        opacity: 0;
        transform: translateY(60px) scale(0.9);
      }
      to {
        opacity: 1;
        transform: translateY(0) scale(1);
      }
    }

    .login-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, transparent, #4f46e5, #7c3aed, #06b6d4, transparent);
      border-radius: 28px 28px 0 0;
      animation: shimmer 3s ease-in-out infinite;
    }

    @keyframes shimmer {
      0%, 100% { opacity: 0.6; }
      50% { opacity: 1; }
    }

    .card-header {
      text-align: center;
      margin-bottom: 45px;
      position: relative;
    }

    .card-header h1 {
      color: #ffffff;
      font-size: 2.8rem;
      font-weight: 700;
      margin-bottom: 15px;
      background: linear-gradient(135deg, #ffffff, #b0b0b0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      animation: fadeInDown 0.8s ease-out 0.2s both;
      letter-spacing: -0.02em;
    }

    .card-header p {
      color: #999;
      font-size: 1.15rem;
      font-weight: 400;
      animation: fadeInDown 0.8s ease-out 0.4s both;
    }

    @keyframes fadeInDown {
      from {
        opacity: 0;
        transform: translateY(-25px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .form-group {
      margin-bottom: 32px;
      position: relative;
      animation: fadeInLeft 0.8s ease-out both;
    }

    .form-group:nth-child(1) { animation-delay: 0.6s; }
    .form-group:nth-child(2) { animation-delay: 0.8s; }

    @keyframes fadeInLeft {
      from {
        opacity: 0;
        transform: translateX(-30px);
      }
      to {
        opacity: 1;
        transform: translateX(0);
      }
    }

    .input-group {
      position: relative;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .input-icon {
      position: absolute;
      left: 20px;
      top: 50%;
      transform: translateY(-50%);
      color: #666;
      font-size: 1.2rem;
      z-index: 3;
      transition: all 0.3s ease;
      pointer-events: none;
    }

    .form-control {
      width: 100%;
      height: 60px;
      background: rgba(30, 30, 30, 0.9) !important;
      border: 2px solid rgba(255, 255, 255, 0.1) !important;
      border-radius: 18px !important;
      padding: 0 25px 0 58px !important;
      font-size: 1.05rem !important;
      font-weight: 500 !important;
      color: #ffffff !important;
      outline: none !important;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
      backdrop-filter: blur(15px);
      box-shadow:
        inset 0 2px 8px rgba(0, 0, 0, 0.3),
        0 0 0 0 rgba(79, 70, 229, 0) !important;
      position: relative;
      z-index: 2;
      -webkit-text-fill-color: #ffffff !important;
      -webkit-appearance: none !important;
    }

    .form-control::placeholder {
      color: #777 !important;
      font-weight: 400 !important;
      transition: all 0.3s ease;
      opacity: 1 !important;
    }

    .form-control:focus {
      border-color: #4f46e5 !important;
      background: rgba(40, 40, 40, 0.95) !important;
      color: #ffffff !important;
      -webkit-text-fill-color: #ffffff !important;
      box-shadow:
        inset 0 2px 8px rgba(0, 0, 0, 0.2),
        0 0 0 4px rgba(79, 70, 229, 0.15),
        0 8px 30px rgba(79, 70, 229, 0.2) !important;
      transform: translateY(-2px);
    }

    .form-control:focus::placeholder {
      color: #999 !important;
      transform: translateX(5px);
    }

    .form-control:focus + .input-icon {
      color: #4f46e5;
      transform: translateY(-50%) scale(1.1);
    }

    .input-group:hover .form-control {
      border-color: rgba(79, 70, 229, 0.3) !important;
      background: rgba(35, 35, 35, 0.9) !important;
      color: #ffffff !important;
      -webkit-text-fill-color: #ffffff !important;
    }

    /* Additional input text visibility fixes */
    input[type="email"], input[type="password"] {
      color: #ffffff !important;
      -webkit-text-fill-color: #ffffff !important;
      background-color: rgba(30, 30, 30, 0.9) !important;
    }

    input[type="email"]:focus, input[type="password"]:focus {
      color: #ffffff !important;
      -webkit-text-fill-color: #ffffff !important;
      background-color: rgba(40, 40, 40, 0.95) !important;
    }

    input[type="email"]:active, input[type="password"]:active {
      color: #ffffff !important;
      -webkit-text-fill-color: #ffffff !important;
    }

    /* Webkit autofill override */
    input:-webkit-autofill,
    input:-webkit-autofill:hover,
    input:-webkit-autofill:focus,
    input:-webkit-autofill:active {
      -webkit-box-shadow: 0 0 0 30px rgba(30, 30, 30, 0.9) inset !important;
      -webkit-text-fill-color: #ffffff !important;
      color: #ffffff !important;
      background-color: rgba(30, 30, 30, 0.9) !important;
    }

    .btn-login {
      width: 100%;
      height: 60px;
      background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #06b6d4 100%);
      border: none;
      border-radius: 18px;
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
      margin: 25px 0;
      animation: fadeInUp 0.8s ease-out 1s both;
      box-shadow: 0 8px 25px rgba(79, 70, 229, 0.3);
    }

    .btn-login::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
      transition: left 0.6s ease;
    }

    .btn-login:hover {
      transform: translateY(-4px);
      box-shadow:
        0 15px 40px rgba(79, 70, 229, 0.4),
        0 0 0 2px rgba(255, 255, 255, 0.1);
      background: linear-gradient(135deg, #5b52f0 0%, #8b46f7 50%, #0ea5e9 100%);
    }

    .btn-login:hover::before {
      left: 100%;
    }

    .btn-login:active {
      transform: translateY(-2px);
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(35px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .signup-link {
      text-align: center;
      margin-top: 35px;
      animation: fadeIn 0.8s ease-out 1.2s both;
    }

    .signup-link p {
      color: #999;
      font-size: 1.05rem;
    }

    .signup-link a {
      color: #4f46e5;
      text-decoration: none;
      font-weight: 600;
      transition: all 0.3s ease;
      position: relative;
    }

    .signup-link a::after {
      content: '';
      position: absolute;
      bottom: -3px;
      left: 0;
      width: 0;
      height: 2px;
      background: linear-gradient(90deg, #4f46e5, #7c3aed);
      transition: width 0.3s ease;
    }

    .signup-link a:hover {
      color: #7c3aed;
      transform: translateY(-1px);
    }

    .signup-link a:hover::after {
      width: 100%;
    }

    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    .alert {
      padding: 18px 22px;
      border-radius: 14px;
      margin-bottom: 28px;
      font-size: 0.98rem;
      font-weight: 500;
      border: 1px solid;
      animation: slideInDown 0.5s ease-out;
    }

    @keyframes slideInDown {
      from {
        opacity: 0;
        transform: translateY(-25px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .alert-danger {
      background: rgba(239, 68, 68, 0.12);
      border-color: rgba(239, 68, 68, 0.3);
      color: #f87171;
    }

    .alert-success {
      background: rgba(34, 197, 94, 0.12);
      border-color: rgba(34, 197, 94, 0.3);
      color: #4ade80;
    }

    .text-danger {
      color: #f87171;
      font-size: 0.9rem;
      margin-top: 10px;
      display: block;
      animation: fadeInUp 0.3s ease-out;
      padding-left: 5px;
    }

    /* Loading animation for button */
    .btn-login.loading {
      pointer-events: none;
      background: linear-gradient(135deg, #6366f1, #8b5cf6);
    }

    .btn-login.loading::after {
      content: '';
      position: absolute;
      width: 22px;
      height: 22px;
      border: 3px solid transparent;
      border-top: 3px solid #ffffff;
      border-radius: 50%;
      animation: spin 1s linear infinite;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
    }

    @keyframes spin {
      0% { transform: translate(-50%, -50%) rotate(0deg); }
      100% { transform: translate(-50%, -50%) rotate(360deg); }
    }

    /* Enhanced hover effects */
    .login-card:hover {
      box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.7),
        0 0 0 1px rgba(255, 255, 255, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .container {
        padding: 10px;
      }

      .login-card {
        padding: 30px 20px;
        max-width: 360px;
        border-radius: 20px;
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
      }

      .card-header h1 {
        font-size: 1.8rem;
      }

      .card-header p {
        font-size: 0.9rem;
      }

      .form-control {
        height: 48px !important;
        font-size: 0.9rem !important;
        padding: 0 18px 0 45px !important;
        border-radius: 14px !important;
      }

      .input-icon {
        left: 12px;
        font-size: 1rem;
      }

      .btn-login {
        height: 48px;
        font-size: 0.95rem;
        border-radius: 14px;
        min-height: 44px;
      }

      .form-group {
        margin-bottom: 20px;
      }

      .signup-link {
        margin-top: 20px;
      }

      .signup-link p {
        font-size: 0.9rem;
      }

      .alert {
        padding: 12px 15px;
        font-size: 0.85rem;
        margin-bottom: 15px;
      }

      .particle {
        width: 4px;
        height: 4px;
        animation-duration: 6s;
      }
    }

    @media (max-width: 480px) {
      .login-card {
        padding: 25px 15px;
        max-width: 320px;
        border-radius: 16px;
      }

      .card-header h1 {
        font-size: 1.6rem;
      }

      .card-header p {
        font-size: 0.85rem;
      }

      .form-control {
        height: 44px !important;
        font-size: 0.85rem !important;
        padding: 0 15px 0 40px !important;
        border-radius: 12px !important;
      }

      .input-icon {
        left: 10px;
        font-size: 0.9rem;
      }

      .btn-login {
        height: 44px;
        font-size: 0.9rem;
        border-radius: 12px;
      }

      .form-group {
        margin-bottom: 15px;
      }

      .signup-link {
        margin-top: 15px;
      }

      .signup-link p {
        font-size: 0.85rem;
      }

      .alert {
        padding: 10px 12px;
        font-size: 0.8rem;
      }

      .text-danger {
        font-size: 0.8rem;
        margin-top: 6px;
      }

      .bg-animation::before {
        animation: none;
      }

      .particles {
        display: none;
      }
    }