:root {
    --primary-color: #4dc0b5;
    --secondary-color: #38c172;
    --danger-color: #e3342f;
    --dark-color: #2d3748;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #2d3748;
    --text-muted: #718096;
}

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

body {
    font-family: 'Nunito', sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 450px;
}

.auth-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.auth-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.auth-logo {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    margin-bottom: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.auth-header h1 {
    font-size: 1.8rem;
    margin-bottom: 5px;
}

.auth-header p {
    opacity: 0.9;
    font-size: 0.95rem;
}

.auth-body {
    padding: 40px 30px;
}

.auth-body h2 {
    color: var(--dark-color);
    margin-bottom: 10px;
    font-size: 1.6rem;
}

.text-muted {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 25px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 0.95rem;
}

.form-group label i {
    margin-right: 5px;
    color: var(--primary-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(77, 192, 181, 0.1);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.error-message {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-top: 5px;
    display: block;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.form-check input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-check label {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(77, 192, 181, 0.4);
}

.btn-block {
    width: 100%;
}

.auth-links {
    margin-top: 25px;
    text-align: center;
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.auth-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.auth-links a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.alert {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.alert-success {
    background: rgba(56, 193, 114, 0.1);
    color: var(--secondary-color);
    border-left: 4px solid var(--secondary-color);
}

@media (max-width: 480px) {
    .auth-card {
        border-radius: 12px;
    }
    
    .auth-header {
        padding: 30px 20px;
    }
    
    .auth-body {
        padding: 30px 20px;
    }
    
    .auth-links {
        flex-direction: column;
        gap: 10px;
    }
}