:root {
    --primary-green: #00AB4E;
    --secondary-green: #72BF44;
    --dark-green: #004E44;
    --light-green: #BFD730;
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f4;
    --gray-200: #e8eaed;
    --gray-300: #dadce0;
    --gray-400: #bdc1c6;
    --gray-500: #9aa0a6;
    --gray-600: #80868b;
    --gray-700: #5f6368;
    --gray-800: #3c4043;
    --gray-900: #202124;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
    background: linear-gradient(135deg, var(--light-green) 0%, var(--white) 50%, var(--gray-50) 100%);
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.login-container {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

.brand-section {
    text-align: center;
    margin-bottom: 48px;
}

.brand-logo {
    width: 90px;
    height: 64px;
    margin-bottom: 16px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.brand-title {
    color: var(--dark-green);
    font-weight: 700;
    font-size: 28px;
    line-height: 1.2;
    margin-bottom: 8px;
    letter-spacing: -0.025em;
}

.brand-subtitle {
    color: var(--gray-600);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.5;
}

.login-card {
    background: var(--white);
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    padding: 48px 40px;
    border: 1px solid var(--gray-200);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-title {
    font-weight: 600;
    font-size: 24px;
    color: var(--gray-900);
    margin-bottom: 8px;
    line-height: 1.3;
}

.login-subtitle {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.5;
}

.role-tabs {
    display: flex;
    background: var(--gray-100);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 32px;
    gap: 4px;
}

.role-tab {
    flex: 1;
    border: none;
    background: transparent;
    font-weight: 500;
    font-size: 14px;
    color: var(--gray-700);
    padding: 12px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.role-tab.active {
    background: var(--white);
    color: var(--primary-green);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
}

.role-tab:hover:not(.active) {
    background: var(--gray-200);
    color: var(--gray-800);
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-weight: 500;
    font-size: 14px;
    color: var(--gray-700);
    margin-bottom: 8px;
    line-height: 1.4;
}

.form-input {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    font-size: 16px;
    font-family: inherit;
    background: var(--white);
    color: var(--gray-900);
    transition: all 0.2s ease;
    line-height: 1.5;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(0, 171, 78, 0.1);
}

.form-input::placeholder {
    color: var(--gray-400);
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--secondary-green) 100%);
    border: none;
    color: var(--white);
    font-weight: 600;
    font-size: 16px;
    padding: 16px 24px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #008f3a 0%, #5a9e2e 100%);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.register-link {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
}

.register-text {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 8px;
}

.register-link a {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.register-link a:hover {
    color: var(--dark-green);
    text-decoration: underline;
}

@media (max-width: 480px) {
    .login-card {
        padding: 32px 24px;
        margin: 0 8px;
    }
    
    .brand-title {
        font-size: 24px;
    }
    
    .login-title {
        font-size: 20px;
    }
}