USACO Mordenize by hinin

/* ==UserStyle== 
@name         USACO Modernize
@version      0.0
@namespace    github.com/hin1n  
@description  Modern redesign for USACO platform with enhanced visual hierarchy and interaction.
@author       hinin
@license      BSD-v3
==/UserStyle== */
 
@-moz-document domain("usaco.org")  {
    /* 基础变量 */
    :root {
        --primary-color: #2c3e50;
        --secondary-color: #3498db;
        --background-color: #f8f9fa;
        --text-color: #34495e;
        --border-radius: 8px;
        --shadow: 0 4px 6px rgba(0,0,0,0.1);
    }
 
    /* 通用样式增强 */
    body {
        font-family: 'Roboto', 'Segoe UI', sans-serif;
        background: var(--background-color);
        line-height: 1.6;
        color: var(--text-color);
        padding: 20px;
    }
 
    /* 导航栏动态效果 */
    .navbar {
        background: linear-gradient(145deg, 
            var(--primary-color), 
            #1a2833); /* darken(primary-color 15%) */
        border-radius: var(--border-radius);
        margin: 1rem 0;
        box-shadow: var(--shadow);
        transition: transform 0.3s ease;
 
        &:hover {
            transform: translateY(-2px);
        }
 
        ul {
            padding: 0.8rem;
            display: flex;
            justify-content: center;
        }
 
        li {
            list-style: none;
            margin: 0 1.2rem;
            position: relative;
        }
 
        a {
            color: white;
            padding: 0.8rem 1.5rem;
            border-radius: 30px;
            transition: all 0.3s ease;
            font-weight: 500;
 
            &::after {
                content: '';
                position: absolute;
                bottom: -5px;
                left: 50%;
                width: 0;
                height: 2px;
                background: rgba(255,255,255,0.5);
                transition: all 0.3s;
            }
 
            &:hover {
                background: rgba(255,255,255,0.15);
                
                &::after {
                    width: 80%;
                    left: 10%;
                }
            }
        }
    }
 
    /* 智能面板系统 */
    .panel {
        background: white;
        border-radius: var(--border-radius);
        padding: 2rem;
        margin-bottom: 2rem;
        box-shadow: var(--shadow);
        position: relative;
        transition: box-shadow 0.3s ease;
 
        &::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border-radius: inherit;
            box-shadow: 0 8px 32px rgba(0,0,0,0.05);
            opacity: 0;
            transition: opacity 0.3s;
        }
 
        &:hover::before {
            opacity: 1;
        }
 
        h2 {
            color: var(--secondary-color);
            border-bottom: 2px solid #a3d5ff; /* lighten(secondary-color 30%) */
            padding-bottom: 1rem;
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
            position: relative;
            
            &::after {
                content: '';
                position: absolute;
                bottom: -2px;
                left: 0;
                width: 50px;
                height: 3px;
                background: var(--secondary-color);
            }
        }
 
        ul {
            padding-left: 1.5rem;
            
            li {
                margin: 1rem 0;
                padding-left: 1rem;
                border-left: 3px solid #cce7ff; /* lighten(secondary-color 40%) */
                transition: transform 0.3s;
                
                &:hover {
                    transform: translateX(10px);
                }
            }
        }
    }
 
    /* 动态按钮系统 */
    .panel[style*="background-color:#FFF;"] button {
        background: var(--secondary-color);
        color: white;
        border: none;
        padding: 0.8rem 1.5rem;
        border-radius: 30px;
        margin: 0.5rem;
        cursor: pointer;
        position: relative;
        overflow: hidden;
        
        &::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                120deg,
                transparent,
                rgba(255,255,255,0.3),
                transparent 
            );
            transition: left 0.6s;
        }
 
        &:hover {
            background: #2980b9; /* darken(secondary-color 10%) */
            
            &::before {
                left: 100%;
            }
        }
    }
 
    /* 时间线效果 */
    .panel:has(h2:contains("2024-2025 Schedule")) {
        background: #f5fbff; /* lighten(secondary-color 95%) */
        position: relative;
        padding-left: 2rem;
 
        &::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            width: 4px;
            height: 100%;
            background: var(--secondary-color);
            border-radius: var(--border-radius);
        }
    }
 
    /* 赞助商动效增强 */
    .sponsors {
        a {
            display: inline-block;
            margin: 1rem;
            padding: 1rem;
            background: white;
            border-radius: var(--border-radius);
            position: relative;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
 
            &::after {
                content: '';
                position: absolute;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                box-shadow: 0 8px 24px rgba(52,152,219,0.2);
                opacity: 0;
                transition: opacity 0.3s;
            }
 
            &:hover {
                transform: translateY(-5px) scale(1.02);
                
                &::after {
                    opacity: 1;
                }
                
                img {
                    filter: none;
                    transform: rotate(-2deg);
                }
            }
        }
 
        img {
            transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
            filter: grayscale(100%);
        }
    }
 
    /* 响应式设计增强 */
    @media (max-width: 768px) {
        .navbar {
            ul {
                flex-direction: column;
                text-align: center;
                
                li {
                    margin: 0.8rem 0;
                }
            }
        }
 
        .panel {
            margin: 1rem;
            padding: 1.5rem;
            
            h2 {
                font-size: 1.5rem;
            }
        }
 
        div[style*="width:300px;"] {
            width: 100% !important;
            margin-top: 1.5rem;
        }
    }
}