// Variables
@primary-color: #2c3e50;
@secondary-color: #3498db;
@accent-color: #e74c3c;
@success-color: #27ae60;
@warning-color: #f39c12;
@background-color: #ecf0f1;
@card-background: #ffffff;
@text-color: #2c3e50;
@border-color: #bdc3c7;
@shadow: 0 2px 10px rgba(0,0,0,0.1);

// Mixins
.button-style(@bg-color) {
    background: @bg-color;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    transition: all 0.3s ease;
    
    &:hover {
        background: darken(@bg-color, 10%);
        transform: translateY(-1px);
    }
    
    &:active {
        transform: translateY(0);
    }
}

.card-style() {
    background: @card-background;
    border-radius: 8px;
    box-shadow: @shadow;
    padding: 20px;
    margin-bottom: 20px;
}

// Reset and base styles
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: @background-color;
    color: @text-color;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

// Header styles
header {
    text-align: center;
    margin-bottom: 40px;
    
    h1 {
        color: @primary-color;
        font-size: 2.5em;
        margin-bottom: 10px;
    }
    
    p {
        color: lighten(@text-color, 20%);
        font-size: 1.1em;
    }
}

// Main content styles
.archive-section {
    .card-style();
    
    h2 {
        color: @primary-color;
        margin-bottom: 10px;
        font-size: 1.8em;
    }
    
    > p {
        color: lighten(@text-color, 20%);
        margin-bottom: 30px;
    }
}

.package-list {
    display: grid;
    gap: 20px;
}

.package-item {
    .card-style();
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-left: 4px solid @secondary-color;
    transition: all 0.3s ease;
    
    &:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    }
    
    .package-info {
        flex: 1;
        
        h3 {
            color: @primary-color;
            margin-bottom: 8px;
            font-size: 1.3em;
        }
        
        .package-details {
            display: flex;
            gap: 20px;
            
            span {
                color: lighten(@text-color, 30%);
                font-size: 0.9em;
                
                &.version {
                    font-weight: 600;
                }
            }
        }
    }
    
    .package-actions {
        display: flex;
        gap: 10px;
        
        .download-btn {
            .button-style(@secondary-color);
            font-size: 13px;
            padding: 8px 16px;
            
            &.docs-download {
                .button-style(@warning-color);
            }
        }
    }
}

.no-packages {
    text-align: center;
    padding: 40px;
    color: lighten(@text-color, 30%);
}

// Footer styles
footer {
    margin-top: 40px;
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid @border-color;
    
    .admin-link {
        margin-bottom: 10px;
        
        a {
            color: @secondary-color;
            text-decoration: none;
            font-weight: 600;
            
            &:hover {
                text-decoration: underline;
            }
        }
    }
    
    p {
        color: lighten(@text-color, 30%);
        font-size: 0.9em;
    }
}

// Admin styles
.admin-body {
    background: darken(@background-color, 5%);
}

.login-container {
    .card-style();
    max-width: 400px;
    margin: 50px auto;
    text-align: center;
    
    h2 {
        color: @primary-color;
        margin-bottom: 10px;
    }
    
    p {
        color: lighten(@text-color, 20%);
        margin-bottom: 30px;
    }
}

.login-form {
    .form-group {
        margin-bottom: 20px;
        text-align: left;
        
        label {
            display: block;
            margin-bottom: 5px;
            color: @primary-color;
            font-weight: 600;
        }
        
        input {
            width: 100%;
            padding: 10px;
            border: 1px solid @border-color;
            border-radius: 4px;
            font-size: 14px;
            
            &:focus {
                outline: none;
                border-color: @secondary-color;
                box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
            }
        }
    }
    
    .login-btn {
        .button-style(@primary-color);
        width: 100%;
        padding: 12px;
        font-size: 16px;
    }
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid @secondary-color;
    
    h1 {
        color: @primary-color;
        font-size: 2em;
    }
    
    .admin-nav {
        display: flex;
        align-items: center;
        gap: 20px;
        
        span {
            color: @primary-color;
            font-weight: 600;
        }
        
        .logout-btn {
            .button-style(@accent-color);
        }
    }
}

.admin-main {
    .upload-section {
        .card-style();
        margin-bottom: 40px;
        
        h2 {
            color: @primary-color;
            margin-bottom: 20px;
        }
        
        .upload-form {
            .form-row {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
                margin-bottom: 20px;
                
                @media (max-width: 768px) {
                    grid-template-columns: 1fr;
                }
            }
            
            .form-group {
                label {
                    display: block;
                    margin-bottom: 5px;
                    color: @primary-color;
                    font-weight: 600;
                }
                
                input {
                    width: 100%;
                    padding: 10px;
                    border: 1px solid @border-color;
                    border-radius: 4px;
                    font-size: 14px;
                    
                    &:focus {
                        outline: none;
                        border-color: @secondary-color;
                        box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
                    }
                }
                
                &:not(.form-row .form-group) {
                    margin-bottom: 20px;
                }
            }
            
            .upload-btn {
                .button-style(@success-color);
                padding: 12px 30px;
                font-size: 16px;
            }
        }
    }
    
    .package-management {
        .card-style();
        
        h2 {
            color: @primary-color;
            margin-bottom: 20px;
        }
        
        .package-table {
            overflow-x: auto;
            
            table {
                width: 100%;
                border-collapse: collapse;
                
                thead {
                    background: @primary-color;
                    color: white;
                    
                    th {
                        padding: 12px;
                        text-align: left;
                        font-weight: 600;
                    }
                }
                
                tbody {
                    tr {
                        border-bottom: 1px solid @border-color;
                        
                        &:hover {
                            background: lighten(@background-color, 2%);
                        }
                        
                        td {
                            padding: 12px;
                            
                            .file-indicator {
                                display: inline-block;
                                padding: 2px 8px;
                                border-radius: 12px;
                                font-size: 11px;
                                font-weight: 600;
                                margin-right: 5px;
                                
                                &.docs {
                                    background: @warning-color;
                                    color: white;
                                }
                                
                                &.package {
                                    background: @secondary-color;
                                    color: white;
                                }
                            }
                            
                            .delete-btn {
                                .button-style(@accent-color);
                                padding: 6px 12px;
                                font-size: 12px;
                            }
                        }
                    }
                }
            }
        }
    }
}

.back-link {
    margin-top: 30px;
    
    a {
        color: @secondary-color;
        text-decoration: none;
        font-weight: 600;
        
        &:hover {
            text-decoration: underline;
        }
    }
}

// Message styles
.error {
    background: lighten(@accent-color, 40%);
    color: @accent-color;
    padding: 15px;
    border-radius: 4px;
    border-left: 4px solid @accent-color;
    margin-bottom: 20px;
}

.success {
    background: lighten(@success-color, 40%);
    color: @success-color;
    padding: 15px;
    border-radius: 4px;
    border-left: 4px solid @success-color;
    margin-bottom: 20px;
}

// Responsive design
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header {
        h1 {
            font-size: 2em;
        }
    }
    
    .package-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        
        .package-actions {
            width: 100%;
            justify-content: flex-end;
        }
    }
    
    .admin-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
        
        .admin-nav {
            justify-content: center;
        }
    }
    
    .package-table {
        font-size: 14px;
        
        table {
            min-width: 600px;
        }
    }
}

@media (max-width: 480px) {
    .package-actions {
        flex-direction: column;
        width: 100%;
        
        .download-btn {
            width: 100%;
            text-align: center;
        }
    }
    
    .login-container {
        margin: 20px auto;
        padding: 15px;
    }
}