:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --success-color: #4cc9f0;
    --danger-color: #f72585;
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--gradient);
    min-height: 100vh;
}

.auth-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Left Side - Branding */
.auth-brand {
    flex: 1;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    position: relative;
    overflow: hidden;
}

.auth-brand::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(45deg);
    top: -50%;
    left: -50%;
    animation: shine 10s infinite linear;
}

@keyframes shine {
    from {
        transform: rotate(45deg) translateY(-100%);
    }
    to {
        transform: rotate(45deg) translateY(100%);
    }
}

.brand-content {
    position: relative;
    z-index: 1;
    max-width: 500px;
    color: white;
    text-align: center;
}

.brand-logo {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    border: 4px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4);
    }
    70% {
        box-shadow: 0 0 0 20px rgba(255, 255, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    }
}

.brand-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.brand-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 3rem;
}

.brand-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    text-align: left;
}

.feature-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: 10px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.2);
}

.feature-item i {
    color: #4cc9f0;
    margin-right: 0.5rem;
}

/* Right Side - Form */
.auth-form {
    flex: 1;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}

.form-container {
    max-width: 400px;
    width: 100%;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h2 {
    color: var(--dark-color);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: #6c757d;
}

/* Form Elements */
.auth-form-elements .form-group {
    margin-bottom: 1.5rem;
}

.auth-form-elements .form-label {
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.auth-form-elements .input-group {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.auth-form-elements .input-group-text {
    border: none;
    background: white;
    color: var(--primary-color);
}

.auth-form-elements .form-control {
    border: none;
    padding: 0.75rem;
    font-size: 1rem;
}

.auth-form-elements .form-control:focus {
    box-shadow: none;
    background: #f8f9fa;
}

.auth-form-elements .toggle-password {
    border: none;
    background: white;
    color: #6c757d;
}

.auth-form-elements .toggle-password:hover {
    color: var(--primary-color);
}

/* Buttons */
.btn-primary {
    background: var(--primary-color);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 97, 238, 0.4);
}

/* Links */
.forgot-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.forgot-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.back-link {
    color: #6c757d;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.back-link:hover {
    color: var(--primary-color);
}

/* Alerts */
.alert {
    border: none;
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    animation: slideIn 0.5s;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.alert-success {
    background: #d4edda;
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
}

/* Password Strength */
.password-strength {
    margin-top: 0.5rem;
}

.progress-bar {
    transition: width 0.3s;
}

/* Responsive Design */
@media (max-width: 992px) {
    .auth-wrapper {
        flex-direction: column;
    }
    
    .auth-brand {
        padding: 2rem;
    }
    
    .brand-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .auth-form {
        padding: 2rem;
    }
    
    .brand-title {
        font-size: 2rem;
    }
}

/* Custom Checkbox */
.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Modal */
.modal-content {
    border: none;
    border-radius: 15px;
    overflow: hidden;
}

.modal-header {
    background: var(--gradient);
    color: white;
    border: none;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

/* Loading Spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.25rem;
}

/* Input Focus Animation */
.form-control:focus + .input-group-text {
    color: var(--primary-color);
}

/* Floating Animation */
@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

.brand-logo {
    animation: pulse 2s infinite, float 3s ease-in-out infinite;
}

/* Hover Effects */
.input-group:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    transition: all 0.3s;
}

/* Social Login (for future use) */
.social-login {
    margin-top: 2rem;
    text-align: center;
}

.social-login::before {
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background: #dee2e6;
    margin-bottom: 1rem;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-color);
    text-decoration: none;
    transition: all 0.3s;
}

.social-icon:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}

.social-icon.google:hover {
    background: #db4437;
    color: white;
}

.social-icon.facebook:hover {
    background: #4267B2;
    color: white;
}

.social-icon.linkedin:hover {
    background: #0077b5;
    color: white;
}