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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --text-primary: #111111;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --border-color: #ebebeb;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-hover);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    gap: 40px;
}

.site-logo img {
    height: 32px;
    width: auto;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-item {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-item:hover {
    color: var(--text-primary);
}

.nav-item.active {
    color: var(--text-primary);
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-color);
    border-radius: 1px;
}

.header-actions {
    margin-left: auto;
}

.search-form {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-form:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-form input {
    border: none;
    background: transparent;
    padding: 8px 14px;
    font-size: 14px;
    width: 200px;
    color: var(--text-primary);
    outline: none;
}

.search-form input::placeholder {
    color: var(--text-tertiary);
}

.search-form button {
    border: none;
    background: transparent;
    padding: 8px 14px;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color 0.2s ease;
}

.search-form button:hover {
    color: var(--accent-color);
}

.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 100px;
}

.announce-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--text-secondary);
}

.announce-bar i {
    color: var(--accent-color);
}

.content-wrapper {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-tertiary);
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--accent-color);
}

.breadcrumb .separator {
    color: var(--border-color);
}

.search-title {
    color: var(--text-primary);
}

.result-count {
    color: var(--text-tertiary);
}

.admin-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.action-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--text-tertiary);
    color: var(--text-primary);
}

.action-btn i {
    font-size: 12px;
}

.file-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.file-table {
    width: 100%;
    border-collapse: collapse;
}

.file-table thead th {
    padding: 14px 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-tertiary);
    text-align: left;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.file-table tbody td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.file-table tbody tr:last-child td {
    border-bottom: none;
}

.file-table tbody tr {
    transition: background 0.15s ease;
}

.file-table tbody tr:hover {
    background: var(--bg-secondary);
}

.col-check {
    width: 48px;
    padding-left: 20px !important;
}

.col-name {
    min-width: 300px;
}

.col-info {
    width: 80px;
}

.col-time {
    width: 160px;
    color: var(--text-tertiary);
    font-size: 13px;
}

.col-size {
    width: 100px;
    color: var(--text-tertiary);
    font-size: 13px;
}

.col-action {
    width: 200px;
    white-space: nowrap;
}

.file-name {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-size: 14px;
}

.file-name:hover {
    color: var(--accent-color);
}

.file-name i {
    font-size: 16px;
    width: 20px;
    text-align: center;
    color: var(--text-tertiary);
}

.file-name.folder i {
    color: var(--accent-color);
}

.row-parent .file-name i {
    color: var(--text-tertiary);
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    color: var(--text-tertiary);
    transition: all 0.15s ease;
}

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

.icon-btn i {
    font-size: 14px;
}

.dropdown {
    display: inline-block;
}

.dropdown-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
}

.dropdown-menu {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 6px;
    min-width: 140px;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    font-size: 13px;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: all 0.15s ease;
}

.dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.dropdown-item i {
    width: 16px;
    color: var(--text-tertiary);
}

.checkbox {
    display: flex;
    align-items: center;
    justify-content: center;
}

.checkbox input {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-color);
    cursor: pointer;
}

.password-card {
    max-width: 400px;
    margin: 80px auto;
    text-align: center;
    padding: 48px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.password-icon {
    font-size: 48px;
    color: var(--accent-color);
    margin-bottom: 24px;
}

.password-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.password-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.password-form input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s ease;
}

.password-form input:focus {
    border-color: var(--accent-color);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
}

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

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-tertiary);
    font-size: 13px;
}

.back-link:hover {
    color: var(--accent-color);
}

.error-card {
    max-width: 400px;
    margin: 80px auto;
    text-align: center;
    padding: 48px;
}

.error-icon {
    font-size: 48px;
    color: #ef4444;
    margin-bottom: 24px;
}

.error-card h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.readme-card {
    margin-top: 32px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.readme-header {
    padding: 14px 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.readme-content {
    padding: 24px;
}

.site-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    padding: 20px;
    font-size: 13px;
    color: var(--text-tertiary);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
}

.site-footer .sep {
    margin: 0 12px;
    color: var(--border-color);
}

.site-footer a {
    color: var(--text-tertiary);
}

.site-footer a:hover {
    color: var(--accent-color);
}

.site-footer.static {
    position: relative;
}

.login-page {
    min-height: calc(100vh - 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
}

.login-wrapper {
    width: 100%;
    max-width: 400px;
}

.login-card {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.login-header p {
    font-size: 14px;
    color: var(--text-tertiary);
}

.login-field {
    margin-bottom: 20px;
}

.login-field label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.login-field .input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.login-field .input-wrapper i {
    position: absolute;
    left: 14px;
    color: var(--text-tertiary);
    font-size: 14px;
}

.login-field input {
    width: 100%;
    padding: 12px 14px 12px 40px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.login-field input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.login-field input::placeholder {
    color: var(--text-tertiary);
}

.login-btn {
    width: 100%;
    padding: 13px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
    margin-top: 8px;
}

.login-btn:hover {
    background: var(--accent-hover);
}

.admin-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.admin-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: 10px;
    margin-bottom: 24px;
}

.admin-tabs .tab-btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    text-decoration: none;
}

.admin-tabs .tab-btn:hover {
    color: var(--text-primary);
}

.admin-tabs .tab-btn.active {
    background: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.admin-tabs .logout-btn {
    color: #dc2626;
}

.admin-tabs .logout-btn:hover {
    color: #b91c1c;
}

.admin-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
}

.admin-card .tab-content {
    display: none;
}

.admin-card .tab-content.active {
    display: block;
}

.admin-card .form-group {
    margin-bottom: 20px;
}

.admin-card .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.admin-card .form-group input,
.admin-card .form-group textarea,
.admin-card .form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: border-color 0.2s ease;
}

.admin-card .form-group input:focus,
.admin-card .form-group textarea:focus,
.admin-card .form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.admin-card .form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.admin-card .form-hint {
    display: block;
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 6px;
}

.admin-card .form-actions {
    display: flex;
    gap: 12px;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.admin-card .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.admin-card .btn-secondary:hover {
    background: var(--bg-primary);
    border-color: var(--text-tertiary);
    color: var(--text-primary);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1050;
}

.modal.show {
    display: flex;
}

.modal-dialog {
    background: var(--bg-primary);
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-header .close {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.modal-header .close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-body p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.modal-body .code-block {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: "SF Mono", Monaco, Consolas, monospace;
    font-size: 13px;
    overflow-x: auto;
    white-space: pre;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.modal-footer .btn-secondary {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
}

.modal-footer .btn-secondary:hover {
    background: var(--bg-primary);
    border-color: var(--text-tertiary);
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 16px;
        gap: 20px;
    }

    .main-nav {
        display: none;
    }

    .search-form input {
        width: 140px;
    }

    .main-content {
        padding: 24px 16px 80px;
    }

    .toolbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .admin-actions {
        flex-wrap: wrap;
    }

    .file-table {
        font-size: 13px;
    }

    .file-table thead th {
        padding: 12px 14px;
    }

    .file-table tbody td {
        padding: 14px;
    }

    .col-time,
    .col-size {
        display: none !important;
    }

    .col-action {
        width: auto !important;
    }

    .password-card {
        margin: 40px 16px;
        padding: 32px 24px;
    }

    .login-card {
        padding: 32px 24px;
    }

    .admin-card {
        padding: 24px 20px;
    }

    .admin-tabs {
        flex-wrap: wrap;
    }

    .admin-tabs .tab-btn {
        flex: none;
        width: calc(50% - 2px);
    }
}

@media (max-width: 576px) {
    .header-actions {
        display: none;
    }
}