/* ===== Variables ===== */
:root {
    --primary-blue: #0066FF;
    --secondary-blue: #0052CC;
    --light-blue: #E6F0FF;
    --pale-blue: #F5F9FF;
    --dark-blue: #002B5C;
    --accent-blue: #00B8FF;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #6B7280;
    --dark-gray: #1F2937;
    --border-gray: #E5E7EB;
    --shadow-sm: 0 2px 8px rgba(0, 102, 255, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 102, 255, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 102, 255, 0.16);
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

body {
    font-family: var(--font-primary);
    background: var(--pale-blue);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== Login Container ===== */
.login-container {
    width: 100%;
    max-width: 1200px;
    margin: 2rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
    min-height: 600px;
}

/* ===== Login Left ===== */
.login-left {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.login-left::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.login-brand i {
    font-size: 3rem;
}

.login-brand h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

.login-tagline {
    font-size: 1.25rem;
    line-height: 1.8;
    margin-bottom: 3rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.login-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: relative;
    z-index: 1;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.125rem;
}

.feature-item i {
    font-size: 1.5rem;
    color: var(--accent-blue);
}

/* ===== Login Right ===== */
.login-right {
    padding: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-box {
    width: 100%;
    max-width: 400px;
}

.back-link {
    margin-bottom: 2rem;
}

.back-link a {
    color: var(--medium-gray);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s;
}

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

.login-box h2 {
    color: var(--dark-blue);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--medium-gray);
    margin-bottom: 2rem;
}

/* ===== Form Styles ===== */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--dark-blue);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.form-group input {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.password-input {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input input {
    padding-right: 3rem;
}

.toggle-password {
    position: absolute;
    right: 0.875rem;
    background: none;
    border: none;
    color: var(--medium-gray);
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s;
}

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

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

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--medium-gray);
    cursor: pointer;
}

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

.btn-login {
    width: 100%;
    padding: 1rem;
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.btn-login:hover {
    background: var(--secondary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.login-message {
    padding: 1rem;
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 500;
    display: none;
}

.login-message.success {
    background: #D1FAE5;
    color: #065F46;
    display: block;
}

.login-message.error {
    background: #FEE2E2;
    color: #991B1B;
    display: block;
}

.login-info {
    margin-top: 2rem;
    padding: 1rem;
    background: var(--pale-blue);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--primary-blue);
}

.login-info p {
    color: var(--medium-gray);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.login-info code {
    background: var(--white);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: var(--primary-blue);
    font-weight: 600;
}

/* ===== Responsive Design ===== */
@media (max-width: 992px) {
    .login-container {
        grid-template-columns: 1fr;
    }
    
    .login-left {
        padding: 3rem 2rem;
        min-height: auto;
    }
    
    .login-brand h1 {
        font-size: 2rem;
    }
    
    .login-tagline {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .login-features {
        display: none;
    }
}

@media (max-width: 576px) {
    .login-container {
        margin: 1rem;
    }
    
    .login-left,
    .login-right {
        padding: 2rem 1.5rem;
    }
    
    .login-box h2 {
        font-size: 1.5rem;
    }
}