:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --secondary: #64748b;
    --accent: #f59e0b;
    --light: #f8fafc;
    --dark: #1e293b;
    --border-radius: 12px;
    --border-color: #e2e8f0;
    --box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    max-width: 1000px;
    width: 100%;
    margin: 20px;
}

.brand-section {
    background: var(--gradient-primary);
    color: white;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 600px;
}

.brand-logo {
    max-width: 200px;
    height: auto;
    margin-bottom: 30px;
}

.brand-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.brand-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.6;
}

.form-section {
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 600px;
}

.form-title {
    color: var(--dark);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.form-subtitle {
    color: var(--secondary);
    font-size: 1rem;
    margin-bottom: 40px;
    line-height: 1.5;
}

.form-control {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 15px 20px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--light);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
    background-color: white;
}

.form-label {
    color: var(--dark);
    font-weight: 600;
    margin-bottom: 8px;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius);
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
}

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

.form-check-input:focus {
    box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25);
}

.forgot-password {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.forgot-password:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

.footer-text {
    color: var(--secondary);
    font-size: 0.9rem;
    text-align: center;
    margin-top: 30px;
}

.footer-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.footer-link:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

.input-group-text {
    background-color: var(--light);
    border: 2px solid var(--border-color);
    border-right: none;
    color: var(--secondary);
}

.input-group .form-control {
    border-left: none;
}

.input-group:focus-within .input-group-text {
    border-color: var(--primary);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .login-container {
        margin: 10px;
    }

    .brand-section {
        padding: 40px 30px;
        min-height: auto;
    }

    .form-section {
        padding: 40px 30px;
        min-height: auto;
    }

    .brand-title {
        font-size: 2rem;
    }

    .form-title {
        font-size: 1.75rem;
    }

    .brand-logo {
        max-width: 150px;
    }
}

@media (max-width: 576px) {
    .brand-section,
    .form-section {
        padding: 30px 20px;
    }

    .brand-title {
        font-size: 1.75rem;
    }

    .form-title {
        font-size: 1.5rem;
    }
}