* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

::selection {
    background: #a65b5b;
    color: #fff;
}

nav {
    position: fixed;
    top: 0;
    background: rgba(27, 27, 27, 0.95);
    width: 100%;
    padding: 15px 0;
    z-index: 12;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

nav .menu {
    max-width: 900px;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
}

.menu .logo a {
    text-decoration: none;
    color: #f0f;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 1px;
}

.menu ul {
    display: inline-flex;
    list-style: none;
}

.menu ul li {
    margin-left: 10px;
}

.menu ul li a {
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    padding: 8px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
    background: rgba(255,255,255,0.1);
}

.menu ul li a:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.hero-section {
    padding: 120px 20px 30px;
    text-align: center;
}

.hero-section .title {
    color: #fff;
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-section .sub_title {
    color: #0ff;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
}

.back-link {
    display: inline-block;
    text-decoration: none;
    color: rgba(255,255,255,0.85);
    font-size: 14px;
    padding: 7px 18px;
    border-radius: 20px;
    background: rgba(255,255,255,0.14);
    border: 1px solid rgba(255,255,255,0.25);
    transition: all 0.2s ease;
}

.back-link:hover {
    background: rgba(255,255,255,0.26);
}

.list-section {
    max-width: 900px;
    margin: 10px auto 0;
    padding: 0 20px 50px;
}

.section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
    color: #fff;
}

.section-head h2 {
    font-size: 22px;
    letter-spacing: 1px;
}

.section-head .count {
    font-size: 13px;
    color: rgba(255,255,255,0.75);
}

.list-card {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 16px;
    backdrop-filter: blur(8px);
    overflow: hidden;
}

.file-list {
    max-height: 620px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.35) transparent;
}

.file-list::-webkit-scrollbar {
    width: 8px;
}

.file-list::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.3);
    border-radius: 4px;
}

.file-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    color: #fff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    transition: background 0.2s ease;
}

.file-row:last-child {
    border-bottom: none;
}

.file-row:hover {
    background: rgba(255,255,255,0.12);
}

.badge {
    flex: 0 0 auto;
    min-width: 44px;
    text-align: center;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .5px;
    padding: 4px 8px;
    border-radius: 6px;
    background: rgba(255,255,255,0.22);
}

.file-name {
    flex: 1;
    min-width: 0;
    font-size: 14px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.folder-badge {
    background: rgba(255,255,255,0.3);
}

.folder-block {
    display: block;
}

.folder-children[hidden] {
    display: none;
}

button.folder-row {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    font-family: inherit;
    font-size: 14px;
    color: #fff;
    text-align: left;
    cursor: pointer;
}

button.folder-row:hover {
    background: rgba(255,255,255,0.12);
}

.folder-arrow {
    flex: 0 0 12px;
    font-size: 11px;
    color: rgba(255,255,255,0.7);
    transition: transform 0.2s ease;
}

.folder-arrow.open {
    transform: rotate(90deg);
}

.level .state {
    text-align: left;
}

.file-size {
    flex: 0 0 auto;
    font-size: 12px;
    color: rgba(255,255,255,0.7);
    font-variant-numeric: tabular-nums;
}

.state {
    padding: 24px;
    text-align: center;
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    line-height: 1.6;
}

.more-wrap {
    display: none;
    text-align: center;
    padding: 14px;
    border-top: 1px solid rgba(255,255,255,0.12);
}

.more-btn {
    padding: 9px 26px;
    border: none;
    border-radius: 20px;
    background: rgba(255,255,255,0.2);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.more-btn:hover:not(:disabled) {
    background: rgba(255,255,255,0.32);
}

.more-btn:disabled {
    opacity: .6;
    cursor: not-allowed;
}

.site-footer {
    text-align: center;
    padding: 0 20px 40px;
    color: rgba(255,255,255,0.72);
    font-size: 13px;
}

@media (max-width: 640px) {
    .menu .logo a {
        font-size: 20px;
    }

    .menu ul li a {
        padding: 8px 12px;
        font-size: 14px;
    }

    .hero-section .title {
        font-size: 34px;
    }

    .hero-section .sub_title {
        font-size: 20px;
    }
}