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

:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --secondary: #0d9488;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --error: #ef4444;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-light);
    min-height: 100vh;
}

.login-container {
    display: flex;
    min-height: 100vh;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}


.login-left {
    width: 100%;
    max-width: 480px;
    display: flex;
    flex-direction: column;
    padding: 40px 60px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    margin: 20px;
}

.brand {
    margin-bottom: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo i {
    font-size: 1.8rem;
}

.login-content {
    max-width: 400px;
    margin: auto 0;
}

.login-content h1 {
    font-size: 2.2rem;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.login-content > p {
    color: var(--text-light);
    margin-bottom: 35px;
    font-size: 1.05rem;
}


.login-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.form-group label i {
    color: var(--primary);
}

.form-group input {
    padding: 14px 18px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

.form-group input::placeholder {
    color: #94a3b8;
}

.password-input {
    position: relative;
}

.password-input input {
    width: 100%;
    padding-right: 50px;
}

.toggle-password {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 5px;
    font-size: 1.1rem;
    transition: var(--transition);
}

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

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-light);
    font-size: 0.95rem;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    cursor: pointer;
}

.btn-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.btn-login:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
}

.btn-login:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}


.error-message {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 10px;
    color: var(--error);
    margin-top: 20px;
    font-size: 0.95rem;
}

.error-message i {
    font-size: 1.1rem;
}


.back-link {
    margin-top: 30px;
    text-align: center;
}

.back-link a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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


.demo-credentials {
    background: linear-gradient(135deg, #0ea5e9 0%, #0d9488 100%);
    color: white;
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 25px;
    text-align: center;
}

.demo-credentials p {
    margin: 5px 0;
    font-size: 0.95rem;
}

.demo-credentials code {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}


@media (max-width: 1024px) {
    .login-left {
        padding: 40px 30px;
    }

    .brand {
        margin-bottom: 30px;
    }

    .login-content {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .login-left {
        padding: 30px 20px;
    }

    .login-content h1 {
        font-size: 1.8rem;
    }

    .form-options {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}