:root {
    --primary-blue: #004B87;
    --secondary-blue: #0066cc;
    --accent-yellow: #FFC107;
    --hover-yellow: #FFB300;
    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #E0E0E0;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --hover-shadow: 0 8px 15px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--primary-blue);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
    border-bottom: 5px solid var(--accent-yellow);
}

.header-container h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.header-container p {
    font-size: 1.1rem;
    color: #E1EFFF;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    flex-grow: 1;
    width: 100%;
}

.explorer-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 2rem;
    background: var(--card-bg);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: bold;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--accent-yellow);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--hover-yellow);
}

.btn-secondary {
    background-color: #e9ecef;
    color: var(--text-main);
}

.btn-secondary:hover:not(:disabled) {
    background-color: #dee2e6;
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.path-display {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--secondary-blue);
    word-break: break-all;
    flex-grow: 1;
}

#status-bar {
    padding: 1rem;
    text-align: center;
    background-color: #E1EFFF;
    color: var(--primary-blue);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: bold;
}

.hidden {
    display: none !important;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
    border-color: var(--secondary-blue);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.card-icon.folder {
    color: var(--accent-yellow);
}

.card-title {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    word-break: break-word;
}

.card-actions {
    margin-top: auto;
    display: flex;
    gap: 10px;
    width: 100%;
}

.card-actions .btn {
    flex: 1;
    justify-content: center;
    font-size: 0.9rem;
    padding: 0.5rem;
}

footer {
    background-color: var(--primary-blue);
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border-top: 5px solid var(--accent-yellow);
}

.preview-content {
    max-width: 800px;
    height: 80vh;
    display: flex;
    flex-direction: column;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--primary-blue);
}

.modal h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-blue);
}

#preview-body {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem;
    background: #fdfdfd;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    white-space: pre-wrap;
    font-family: inherit;
}

#preview-body pre {
    background: #f4f4f4;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

#preview-body img {
    max-width: 100%;
    height: auto;
}

.modal-footer, .modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.modal-actions {
    margin-top: 2rem;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-blue);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .header-container h1 {
        font-size: 1.8rem;
    }
    .header-container p {
        font-size: 0.95rem;
    }
    .container {
        padding: 1rem;
    }
    .explorer-header {
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
        gap: 10px;
    }
    .path-display {
        font-size: 0.9rem;
        text-align: center;
    }
    .btn {
        padding: 0.8rem 1rem; /* Better touch targets */
        font-size: 1rem;
    }
    .grid {
        grid-template-columns: 1fr; /* Full width cards on mobile */
        gap: 1rem;
    }
    .card {
        padding: 1.25rem;
    }
    
    /* Modals for Mobile */
    .modal-content {
        width: 95%;
        padding: 1.25rem;
        margin: auto;
    }
    .preview-content {
        height: 90vh;
        max-height: 92vh;
    }
    #preview-body {
        padding: 0.75rem;
    }
    .close-btn {
        top: 10px;
        right: 15px;
        font-size: 2rem; 
        padding: 5px;
    }
    .modal h2 {
        font-size: 1.3rem;
        margin-right: 2rem; /* Avoid overlap with close btn */
        margin-bottom: 1rem;
    }
    .modal-footer {
        flex-direction: column;
        align-items: stretch;
    }
    .modal-actions {
        flex-direction: column;
        gap: 10px;
    }
}