:root {
    --primary-gradient: linear-gradient(135deg, #1B578E 0%, #1B578E 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--primary-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow-x: hidden;
}

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

.particle {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100px) rotate(360deg);
        opacity: 0;
    }
}

/* Login Container */
.login-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-left {
    background: var(--primary-gradient);
    color: white;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-left::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
            45deg,
            transparent,
            transparent 10px,
            rgba(255,255,255,0.05) 10px,
            rgba(255,255,255,0.05) 20px
    );
    animation: move 20s linear infinite;
}

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

.login-left h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    position: relative;
    z-index: 2;
}

.login-left p {
    font-size: 1.1rem;
    opacity: 0.9;
    position: relative;
    z-index: 2;
}

.login-right {
    padding: 3rem;
}

.form-floating {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-control {
    background: rgba(248, 249, 250, 0.8);
    border: 2px solid #e9ecef;
    border-radius: 15px;
    padding: 1.2rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    background: white;
    border-color: #1B578E;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    transform: translateY(-2px);
}

.form-label {
    font-weight: 600;
    color: #495057;
}

.btn-login {
    background: var(--primary-gradient);
    border: none;
    border-radius: 15px;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    width: 100%;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-login::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 0.5s ease;
}

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

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
    color: white;
}

.social-login {
    margin-top: 2rem;
    text-align: center;
}

.social-btn {
    display: inline-block;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin: 0 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-btn.google {
    background: #db4437;
}

.social-btn.microsoft {
    background: #0078d4;
}

.social-btn.linkedin {
    background: #0077b5;
}

.social-btn:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.divider {
    text-align: center;
    margin: 2rem 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #dee2e6;
}

.divider span {
    background: white;
    padding: 0 1rem;
    color: #6c757d;
    font-size: 0.9rem;
}

.forgot-password {
    text-align: center;
    margin-top: 1rem;
}

.forgot-password a {
    color: #1B578E;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password a:hover {
    color: #5a67d8;
    text-decoration: underline;
}

.register-link {
    text-align: center;
    margin-top: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8f9ff 0%, #e3f2fd 100%);
    border-radius: 15px;
}

.register-link a {
    color: #1B578E;
    text-decoration: none;
    font-weight: 600;
}

.register-link a:hover {
    text-decoration: underline;
}

.back-home {
    position: absolute;
    top: 2rem;
    left: 2rem;
    z-index: 1000;
}

.back-home a {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.back-home a:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.security-info {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
    padding: 1rem;
    margin-top: 1.5rem;
    border-radius: 0 10px 10px 0;
}

.security-info h6 {
    color: #1976d2;
    margin-bottom: 0.5rem;
}

.security-info p {
    color: #424242;
    font-size: 0.9rem;
    margin: 0;
}

/* Form Validation Styles */
.form-control.is-invalid {
    border-color: #dc3545;
    animation: shake 0.5s ease;
}

.form-control.is-valid {
    border-color: #28a745;
}

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

.invalid-feedback {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

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

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

/* Responsive */
@media (max-width: 768px) {
    .login-left {
        padding: 2rem 1.5rem;
    }

    .login-right {
        padding: 2rem 1.5rem;
    }

    .login-left h2 {
        font-size: 2rem;
    }
}