:root {
    --color-bg: #ffffff;
    --color-text: #24292e;
    --color-border: #e1e4e8;
    --color-primary: #0366d6;
    --color-primary-hover: #0256b9;
    --color-error: #d73a49;
    --color-success: #28a745;
    --color-header-bg: #f6f8fa;
    --color-footer-bg: #f6f8fa;
    --border-radius: 6px;
    --spacing: 16px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing);
}

header {
    text-align: center;
    margin-bottom: calc(var(--spacing) * 2);
    padding: calc(var(--spacing) * 2) 0;
    border-bottom: 1px solid var(--color-border);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing);
}

.description {
    font-size: 1.2rem;
    color: #586069;
}

.search-container {
    display: flex;
    margin-bottom: calc(var(--spacing));
}

input[type="text"], input[type="number"] {
    flex: 1;
    padding: 12px;
    font-size: 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    outline: none;
}

input[type="text"]:focus, input[type="number"]:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(3, 102, 214, 0.3);
}

button {
    padding: 12px 20px;
    background-color: var(--color-primary);
    color: white;
    font-size: 16px;
    border: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.hidden {
    display: none;
}

/* 高级选项样式 */
.advanced-options {
    margin-bottom: calc(var(--spacing) * 2);
}

.advanced-options summary {
    cursor: pointer;
    color: var(--color-primary);
    font-size: 0.9rem;
    padding: 8px 0;
    user-select: none;
}

.advanced-options summary:hover {
    text-decoration: underline;
}

.advanced-options-content {
    background-color: var(--color-header-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing);
    margin-top: 8px;
}

.option-group {
    margin-bottom: 12px;
}

.option-group:last-child {
    margin-bottom: 0;
}

.option-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
    font-size: 0.9rem;
}

.option-group input {
    width: 100%;
    border-radius: var(--border-radius);
}

.option-hint {
    display: block;
    font-size: 0.8rem;
    color: #586069;
    margin-top: 4px;
}

#resultContainer {
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: calc(var(--spacing) * 2);
}

.result-header {
    background-color: var(--color-header-bg);
    padding: var(--spacing);
    border-bottom: 1px solid var(--color-border);
}

.result-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.result-content {
    padding: var(--spacing);
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--spacing);
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

#loadingIndicator {
    text-align: center;
    padding: var(--spacing) 0;
}

.error-message {
    color: var(--color-error);
    padding: var(--spacing);
    background-color: rgba(215, 58, 73, 0.1);
    border-radius: var(--border-radius);
}

.download-box {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: #f6f8fa;
}

.download-icon {
    margin-right: var(--spacing);
    color: var(--color-primary);
    padding-top: 4px;
}

.download-details {
    flex: 1;
    overflow: hidden;
}

.download-details h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.download-details p {
    color: #586069;
    font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    word-break: break-all;
}

.timestamp {
    font-size: 0.8rem;
    margin-top: 10px;
    color: #6a737d;
    border-top: 1px dashed var(--color-border);
    padding-top: 8px;
}

.account-info {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--color-border);
}

.account-info h4 {
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.account-info-content {
    font-size: 0.85rem;
}

.download-button {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--color-success);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: background-color 0.2s;
    white-space: nowrap;
    margin-left: var(--spacing);
}

.download-button:hover {
    background-color: #249540;
}

footer {
    margin-top: calc(var(--spacing) * 3);
    padding-top: var(--spacing);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: #586069;
    font-size: 0.9rem;
}

.cache-info {
    margin-top: 8px;
    font-size: 0.8rem;
    color: #6a737d;
}

/* 历史按钮和设置按钮样式 */
.history-button-container {
    position: absolute;
    top: var(--spacing);
    left: var(--spacing);
}

.history-button {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    padding: 0;
}

.history-button:hover {
    background-color: var(--color-header-bg);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.settings-button-container {
    position: absolute;
    top: var(--spacing);
    right: var(--spacing);
}

.settings-button {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    padding: 0;
}

.settings-button:hover {
    background-color: var(--color-header-bg);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* 历史面板样式 */
.history-panel {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    width: 320px;
    background-color: var(--color-bg);
    box-shadow: 3px 0 15px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    transition: var(--transition-smooth);
    overflow-y: auto;
    padding: 0;
    transform: translateX(0);
    opacity: 1;
    border-right: 1px solid var(--color-border);
}

.history-panel.hidden {
    transform: translateX(-100%);
    opacity: 0;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-header-bg);
}

.history-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--color-text);
}

.history-content {
    padding: var(--spacing);
}

.history-items {
    margin-bottom: var(--spacing);
}

.history-item {
    display: flex;
    flex-direction: column;
    padding: 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    margin-bottom: 10px;
    background-color: #f8f9fa;
    transition: all 0.2s;
}

.history-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.history-item-md5 {
    font-family: monospace;
    font-size: 0.85rem;
    color: #586069;
    margin-bottom: 8px;
    word-break: break-all;
}

.history-item-time {
    font-size: 0.75rem;
    color: #6a737d;
    margin-bottom: 10px;
}

.history-item-actions {
    display: flex;
    justify-content: flex-end;
}

.history-download-button {
    padding: 6px 12px;
    font-size: 0.85rem;
    background-color: var(--color-success);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s;
}

.history-download-button:hover {
    background-color: #249540;
}

.history-empty {
    text-align: center;
    padding: 20px;
    color: #586069;
}

.history-actions {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing);
    padding-top: var(--spacing);
    border-top: 1px solid var(--color-border);
}

.danger-button {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--color-error);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 8px 16px;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 0.9rem;
}

.danger-button:hover {
    background-color: #c5383d;
}

/* 设置按钮和面板样式 */
.settings-panel {
    position: fixed;
    right: 0;
    top: 0;
    height: 100%;
    width: 320px;
    background-color: var(--color-bg);
    box-shadow: -3px 0 15px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    transition: var(--transition-smooth);
    overflow-y: auto;
    padding: 0;
    transform: translateX(0);
    opacity: 1;
    border-left: 1px solid var(--color-border);
}

.settings-panel.hidden {
    transform: translateX(100%);
    opacity: 0;
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-header-bg);
}

.settings-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--color-text);
}

.close-button {
    background: transparent;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    padding: 0;
}

.close-button:hover {
    background-color: rgba(0, 0, 0, 0.08);
    transform: rotate(90deg);
}

.close-button:active {
    transform: rotate(90deg) scale(0.9);
}

.close-button svg {
    transition: stroke 0.2s;
}

.close-button:hover svg {
    stroke: var(--color-error);
}

.settings-content {
    padding: var(--spacing);
}

.setting-group {
    margin-bottom: var(--spacing);
    display: flex;
    flex-direction: column;
}

.setting-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--color-text);
}

.setting-group label svg {
    color: var(--color-primary);
}

.setting-group input {
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-bottom: 10px;
}

.saved-indicator {
    color: var(--color-success);
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-block;
    padding: 8px 12px;
    background-color: rgba(40, 167, 69, 0.1);
    border-radius: 4px;
    animation: fade-in 0.3s ease;
    margin-top: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    border-left: 3px solid var(--color-success);
}

.saved-indicator.hidden {
    display: none;
    animation: none;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.settings-info {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: var(--spacing);
    font-size: 0.85rem;
    color: #6a737d;
    line-height: 1.5;
    padding: 10px;
    background-color: rgba(3, 102, 214, 0.05);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--color-primary);
}

.settings-info svg {
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 3px;
}

/* 密码输入框和查看按钮 */
.password-input-container {
    position: relative;
    width: 100%;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}

.password-input-container input {
    flex: 1;
    padding-right: 40px;
    transition: all 0.3s ease;
    background-color: rgba(255, 255, 255, 0.9);
    height: 42px;
    font-size: 0.95rem;
}

.password-input-container input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(3, 102, 214, 0.2);
    background-color: #fff;
}

.toggle-visibility-button {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: #586069;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 2;
}

.toggle-visibility-button:hover {
    background-color: rgba(3, 102, 214, 0.1);
    color: var(--color-primary);
}

.toggle-visibility-button:active {
    transform: translateY(-50%) scale(0.95);
}

.toggle-visibility-button .eye-off-icon {
    display: none;
}

.toggle-visibility-button.visible .eye-icon {
    display: none;
}

.toggle-visibility-button.visible .eye-off-icon {
    display: block;
}

/* 通知弹窗 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1100;
    width: 300px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    animation: slide-in 0.3s ease;
    transition: opacity 0.5s ease;
}

.notification.fade-out {
    opacity: 0;
}

@keyframes slide-in {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification-content {
    padding: 16px;
    position: relative;
}

.notification p {
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.notification-button {
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 8px 16px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

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

.close-notification {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: none;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #586069;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.close-notification:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* 按钮容器 */
.button-action-container {
    margin-top: 12px;
    margin-bottom: 12px;
}

/* 保存按钮 */
.save-button {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 10px 18px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(3, 102, 214, 0.2);
}

.save-button:hover {
    background-color: var(--color-primary-hover);
    box-shadow: 0 3px 6px rgba(3, 102, 214, 0.3);
    transform: translateY(-1px);
}

.save-button:active {
    transform: translateY(1px);
    box-shadow: 0 1px 2px rgba(3, 102, 214, 0.2);
}

.save-button svg {
    transition: transform 0.2s;
}

.save-button:hover svg {
    transform: translateY(-1px);
}

/* 图书信息容器样式 */
.book-info-container {
    margin: 12px 0;
    padding: 15px;
    background-color: rgba(3, 102, 214, 0.05);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--color-primary);
}

.book-title {
    font-size: 1.1rem;
    margin: 0 0 10px 0;
    color: var(--color-primary);
    font-weight: 600;
}

.book-details {
    font-size: 0.9rem;
    color: var(--color-text);
}

.book-details p {
    margin: 6px 0;
    line-height: 1.4;
}

.book-details strong {
    font-weight: 600;
    margin-right: 5px;
    color: #444;
}

.book-raw-info {
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.4;
    margin: 5px 0;
    word-break: break-word;
}

/* 调整下载框样式，使其能更好地显示图书信息 */
.download-box {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: #f6f8fa;
}

.download-details {
    flex: 1;
    overflow: hidden;
}

.download-details h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.timestamp {
    font-size: 0.8rem;
    margin-top: 10px;
    color: #6a737d;
    border-top: 1px dashed var(--color-border);
    padding-top: 8px;
}

/* 密钥信息容器 */
.key-info-container {
    margin-top: 20px;
    padding: 15px;
    background-color: #f8f9fa;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition-smooth);
}

.key-info-container.hidden {
    display: none;
}

.key-info-container h4 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--color-text);
    display: flex;
    align-items: center;
}

.key-info-content {
    font-size: 0.9rem;
}

.key-info-content p {
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px dashed #e1e4e8;
    display: flex;
    justify-content: space-between;
}

.key-info-content p:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.key-info-content strong {
    font-weight: 600;
    color: #24292e;
}

.key-info-content span {
    color: #586069;
}

.history-info {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-top: var(--spacing);
    font-size: 0.85rem;
    color: #6a737d;
    line-height: 1.5;
    padding: 10px;
    background-color: rgba(3, 102, 214, 0.05);
    border-radius: var(--border-radius);
    border-left: 3px solid var(--color-primary);
}

.history-info svg {
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 3px;
}