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

body {
    background: #0a0a0a;
    color: #e5e5e5;
    font-family: 'Segoe UI', system-ui, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    padding: 2rem 3rem;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 1px;
    color: #e5e5e5;
    cursor: pointer;
}

.logo:hover {
    color: #ffffff;
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.hero h1 {
    font-size: 9rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    text-shadow: 0 0 40px rgba(255,255,255,0.5);
}

.hero h2 {
    font-size: 2.1rem;
    font-weight: 400;
    letter-spacing: 0.35em;
    color: #777777;
    margin-top: 0.6rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    width: 90%;
    max-width: 720px;
    background: #1f1f1f;
    border: 1px solid #555;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.9);
}

.title-bar {
    background: #2d2d2d;
    padding: 10px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #444;
}

.close-btn {
    background: none;
    border: none;
    color: #e5e5e5;
    font-size: 1.6rem;
    cursor: pointer;
}

.close-btn:hover {
    color: #ff5555;
}

/* Explorer Layout */
.explorer-body {
    display: flex;
    min-height: 420px;
}

.sidebar {
    width: 240px;
    background: #252525;
    padding: 16px;
    border-right: 1px solid #444;
}

.sidebar p {
    color: #aaa;
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    padding: 8px 14px;
    border-radius: 4px;
}

.sidebar li.active {
    background: #3a3a3a;
    color: white;
}

.main-folder {
    flex: 1;
    padding: 25px;
}

.folder-path {
    color: #888;
    margin-bottom: 20px;
}

.note {
    color: #bbbbbb;
    line-height: 1.7;
}

.note h3 {
    color: #e5e5e5;
    margin-bottom: 18px;
    border-bottom: 1px solid #444;
    padding-bottom: 8px;
}

.note strong {
    color: #ddd;
}

.note a {
    color: #00b4d8;
    text-decoration: none;
}

.note a:hover {
    text-decoration: underline;
}

/* Mobile */
@media (max-width: 768px) {
    header {
        padding: 1.5rem 1.8rem;
    }
    
    .hero h1 {
        font-size: 5.8rem;
    }
    
    .hero h2 {
        font-size: 1.85rem;
    }
    
    .explorer-body {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 160px;
        border-right: none;
        border-bottom: 1px solid #444;
    }
    
    .modal-content {
        width: 94%;
    }
}