body {
        font-family: 'Cairo', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        min-height: 100vh;
        margin: 0;
        padding: 0;
        overflow-x: hidden;
    }

    /* Background Animation */
    .login-background {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        z-index: -2;
    }

    .floating-shapes {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        overflow: hidden;
    }

    .shape {
        position: absolute;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
        animation: float 6s ease-in-out infinite;
    }

    .shape:nth-child(1) {
        width: 80px;
        height: 80px;
        top: 20%;
        left: 20%;
        animation-delay: 0s;
    }

    .shape:nth-child(2) {
        width: 60px;
        height: 60px;
        top: 70%;
        right: 20%;
        animation-delay: 1s;
    }

    .shape:nth-child(3) {
        width: 100px;
        height: 100px;
        top: 40%;
        left: 80%;
        animation-delay: 2s;
    }

    .shape:nth-child(4) {
        width: 40px;
        height: 40px;
        top: 80%;
        left: 10%;
        animation-delay: 3s;
    }

    @keyframes float {
        0%, 100% { transform: translateY(0px) rotate(0deg); }
        50% { transform: translateY(-20px) rotate(180deg); }
    }

    /* Main Login Container */
    .login-wrapper {
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 20px;
        position: relative;
    }

    .login-container {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        border-radius: 25px;
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
        border: 1px solid rgba(255, 255, 255, 0.3);
        padding: 50px 40px;
        max-width: 450px;
        width: 100%;
        position: relative;
        overflow: hidden;
        animation: slideInUp 0.8s ease-out;
    }

    .login-container::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 5px;
        background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #667eea 100%);
        background-size: 200% 100%;
        animation: gradientShift 3s ease-in-out infinite;
    }

    @keyframes slideInUp {
        from {
            transform: translateY(30px);
            opacity: 0;
        }
        to {
            transform: translateY(0);
            opacity: 1;
        }
    }

    @keyframes gradientShift {
        0%, 100% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
    }

    /* Header */
    .login-header {
        text-align: center;
        margin-bottom: 40px;
    }

    .login-header .logo {
        width: 80px;
        height: 80px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 20px;
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
        animation: pulse 2s ease-in-out infinite;
    }

    .login-header .logo i {
        font-size: 2.5rem;
        color: white;
    }

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

    .login-header h2 {
        color: #2c3e50;
        font-weight: 700;
        font-size: 2rem;
        margin-bottom: 10px;
    }

    .login-header p {
        color: #7f8c8d;
        font-size: 1rem;
        margin: 0;
    }

    /* Alert Styles */
    .alert-modern {
        background: rgba(231, 76, 60, 0.1);
        border: 1px solid rgba(231, 76, 60, 0.3);
        border-radius: 15px;
        color: #c0392b;
        padding: 15px 20px;
        margin-bottom: 25px;
        display: flex;
        align-items: center;
        gap: 10px;
        animation: shake 0.5s ease-in-out;
    }

    @keyframes shake {
        0%, 100% { transform: translateX(0); }
        25% { transform: translateX(-5px); }
        75% { transform: translateX(5px); }
    }

    .alert-modern i {
        font-size: 1.2rem;
    }

    /* Form Styles */
    .form-group {
        margin-bottom: 25px;
        position: relative;
    }

    .form-label {
        display: block;
        color: #2c3e50;
        font-weight: 600;
        margin-bottom: 8px;
        font-size: 1rem;
    }

    .input-group {
        position: relative;
        display: flex;
        align-items: center;
    }

    .input-icon {
        position: absolute;
        left: 15px;
        top: 50%;
        transform: translateY(-50%);
        color: #7f8c8d;
        font-size: 1.1rem;
        z-index: 2;
        transition: all 0.3s ease;
    }

    .form-control-modern {
        width: 100%;
        padding: 15px 20px 15px 50px;
        border: 2px solid #e9ecef;
        border-radius: 15px;
        font-size: 1rem;
        background: rgba(255, 255, 255, 0.9);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        outline: none;
        font-family: 'Cairo', sans-serif;
    }

    .form-control-modern:focus {
        border-color: #667eea;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        background: white;
    }

    .form-control-modern:focus + .input-icon {
        color: #667eea;
        transform: translateY(-50%) scale(1.1);
    }

    .form-control-modern::placeholder {
        color: #bdc3c7;
        font-weight: 400;
    }

    /* Password Toggle */
    .password-toggle {
        position: absolute;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
        color: #7f8c8d;
        cursor: pointer;
        font-size: 1.1rem;
        transition: all 0.3s ease;
        z-index: 2;
    }

    .password-toggle:hover {
        color: #667eea;
    }

    /* Submit Button */
    .btn-login {
        width: 100%;
        padding: 16px 30px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border: none;
        border-radius: 15px;
        color: white;
        font-size: 1.1rem;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
        overflow: hidden;
        margin-top: 10px;
        box-shadow: 0 8px 25px rgba(102, 126, 234, 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, 0.3), transparent);
        transition: left 0.5s;
    }

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

    .btn-login:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
        background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    }

    .btn-login:active {
        transform: translateY(0);
    }

    /* Loading State */
    .btn-login.loading {
        pointer-events: none;
        opacity: 0.8;
    }

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

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

    /* Footer */
    .login-footer {
        text-align: center;
        margin-top: 30px;
        padding-top: 20px;
        border-top: 1px solid #e9ecef;
    }

    .login-footer p {
        color: #7f8c8d;
        font-size: 0.9rem;
        margin: 0;
    }

    /* Responsive Design */
    @media (max-width: 576px) {
        .login-container {
            margin: 10px;
            padding: 40px 25px;
        }

        .login-header h2 {
            font-size: 1.7rem;
        }

        .form-control-modern {
            padding: 14px 18px 14px 45px;
        }

        .btn-login {
            padding: 14px 25px;
            font-size: 1rem;
        }
    }

    /* Accessibility */
    .form-control-modern:focus,
    .btn-login:focus {
        outline: 2px solid #667eea;
        outline-offset: 2px;
    }