:root {
    --primary-color: #4ECDC4;
    --secondary-color: #FF6B6B;
    --accent-color: #FFE66D;
    --text-color: #2C3E50;
    --bg-color: #F7F9FC;
    --card-bg: #FFFFFF;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 12px;
}

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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* Header */
.site-header {
    background-color: var(--primary-color);
    padding: 40px 0;
    color: white;
    text-align: center;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    border-bottom-left-radius: 30px;
    border-bottom-right-radius: 30px;
}

.logo-area h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 0px rgba(0,0,0,0.1);
}

.logo-area p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.search-box {
    margin-top: 25px;
}

#searchInput {
    padding: 15px 25px;
    width: 100%;
    max-width: 500px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    outline: none;
    transition: all 0.3s ease;
}

#searchInput:focus {
    transform: scale(1.02);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* Navigation */
.breadcrumb {
    background: white;
    padding: 15px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.breadcrumb-item {
    cursor: pointer;
    color: var(--primary-color);
    font-weight: bold;
    transition: color 0.2s;
}

.breadcrumb-item:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.breadcrumb-separator {
    color: #ccc;
}

/* Grid Content */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    min-height: 300px;
}

.item-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 2px solid transparent;
}

.item-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.item-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.item-name {
    font-weight: bold;
    font-size: 1.1rem;
    word-break: break-word;
}

.item-type-folder .item-icon {
    color: var(--accent-color);
    text-shadow: 1px 1px 0 #e0c650;
}

.item-type-file .item-icon {
    color: var(--secondary-color);
}

/* Loading & Empty States */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    font-size: 1.5rem;
    color: #888;
    padding: 50px;
}

/* Footer */
.site-footer {
    margin-top: 50px;
    padding: 30px 0;
    text-align: center;
    color: #888;
    background: white;
    border-top: 1px solid #eee;
}

.source-link a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Responsive */
@media (max-width: 600px) {
    .grid-container {
        grid-template-columns: repeat(2, 1fr); /* 2 columns on mobile */
        gap: 10px;
    }
    
    .item-card {
        padding: 15px 10px;
    }
    
    .item-icon {
        font-size: 2.5rem;
    }
    
    .item-name {
        font-size: 0.9rem;
    }
}