:root {
    --primary-color: #8B4513;
    --secondary-color: #D2691E;
    --accent-color: #F4A460;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --error-color: #e74c3c;
    --success-color: #2ecc71;
    --light-color: #F5F5DC;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, 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;
    margin: 0;
}

.login-container {
    width: 100%;
    max-width: 420px;
    animation: fadeIn 0.5s ease-out;
}

.login-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.login-card:hover {
    transform: translateY(-5px);
}

.login-header {
    background: var(--primary-color);
    color: white;
    padding: 30px 20px;
    text-align: center;
}

.logo-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

.logo-placeholder i {
    font-size: 2.5rem;
    margin-right: 15px;
}

.logo-placeholder h2 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

.login-header h3 {
    margin: 0;
    font-weight: 400;
    font-size: 1.2rem;
}

.login-form {
    padding: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
    box-sizing: border-box;
}

.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(139, 69, 19, 0.2);
    outline: none;
}

.form-group input.error {
    border-color: var(--error-color);
}

.password-container {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #777;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
}

.toggle-password:hover {
    background: #f0f0f0;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.remember-me {
    display: flex;
    align-items: center;
}

.remember-me input {
    margin-right: 8px;
}

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

.forgot-password:hover {
    text-decoration: underline;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
    text-decoration: none;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--secondary-color);
}

.btn-primary:disabled {
    background: #cccccc;
    cursor: not-allowed;
}

.btn i {
    margin-right: 0;
}

.alert {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

.login-footer {
    text-align: center;
    padding: 15px;
    background: #f9f9f9;
    color: #777;
    font-size: 0.85rem;
}

.loading {
    display: none;
}

.loading.active {
    display: inline-block;
    animation: spin 1s linear infinite;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 480px) {
    .login-form {
        padding: 20px;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .forgot-password {
        margin-top: 0;
    }
    
    .login-header {
        padding: 20px 15px;
    }
    
    .logo-placeholder i {
        font-size: 2rem;
    }
    
    .logo-placeholder h2 {
        font-size: 1.5rem;
    }
}