:root {
    --bg-color: #f4f7f6;
    --text-color: #333;
    --card-bg: #fff;
    --border-color: #ddd;
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --danger-color: #dc3545;
    --hover-bg: #f8f9fa;
    --error-color: #dc3545;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --border-color: #333;
    --primary-color: #375a7f;
    --primary-hover: #2b4764;
    --hover-bg: #2a2a2a;
    --error-color: #ff6b6b;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

#app {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--primary-hover);
}

button.btn-cancel {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

button.btn-cancel:hover {
    background-color: var(--hover-bg);
}

.header-actions {
    display: flex;
    gap: 10px;
}

.icon-btn {
    background: transparent;
    color: var(--text-color);
    font-size: 24px;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background-color: var(--hover-bg);
}

.view {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border: 1px solid var(--border-color);
}

.hidden {
    display: none !important;
}

.login-container {
    max-width: 400px;
    margin: 40px auto;
    text-align: center;
}

.login-container h2 {
    margin-bottom: 20px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.error-msg {
    color: var(--error-color);
    margin-top: 10px;
    font-size: 14px;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.breadcrumb {
    font-size: 18px;
    font-weight: bold;
}

.breadcrumb span {
    cursor: pointer;
    color: var(--primary-color);
}

.breadcrumb span:hover {
    text-decoration: underline;
}

.file-list-header, .file-item {
    display: flex;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.file-list-header {
    font-weight: bold;
    background-color: var(--hover-bg);
}

.file-item {
    cursor: pointer;
    align-items: center;
}

.file-item:hover {
    background-color: var(--hover-bg);
}

.col-checkbox {
    width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.col-name {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
}

.col-size {
    width: 100px;
    text-align: right;
    color: #888;
}

.icon {
    font-size: 20px;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: #888;
}

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--card-bg);
    padding: 24px;
    border-radius: 8px;
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
}

.modal-content h3 {
    margin-bottom: 16px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

.progress-bar-bg {
    background-color: var(--border-color);
    border-radius: 4px;
    height: 10px;
    width: 100%;
    overflow: hidden;
}

.progress-bar-fill {
    background-color: var(--primary-color);
    height: 100%;
    width: 0%;
    transition: width 0.1s linear;
}