/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Common Utility Classes ===== */
.clickable {
    cursor: pointer;
}

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

.page-footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-color-soft);
    font-size: 0.8rem;
    background-color: var(--bg-color-dark);
    border-top: 1px solid var(--border-color);
}

.footer-content p {
    margin: 0.5rem 0;
}

.footer-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-content a:hover {
    text-decoration: underline;
}

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* ===== Main Container ===== */
.container {
    min-height: 70vh;
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-color);
}

.empty-state-subtext {
    font-size: 14px;
    color: var(--text-tertiary);
}

.lyrics-content {
    white-space: pre-wrap;
    line-height: 1.8;
    font-size: 14px;
    margin: 20px 5px 5px 5px;
    color: var(--text-color);
    font-family: inherit;
}

/* ===== 全局滚动条样式 ===== */

/* Webkit浏览器（Chrome, Safari, Edge）滚动条 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.35);
}

/* 夜间模式滚动条 */
[data-theme="dark"] ::-webkit-scrollbar-track {
    background: #1a1a1a;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* 容器内滚动条（更细致的样式） */
.container::-webkit-scrollbar,
.modal-content::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

/* Firefox滚动条（使用标准属性） */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.2) var(--bg-color);
}

[data-theme="dark"] * {
    scrollbar-color: rgba(255, 255, 255, 0.15) #1a1a1a;
}

/* ===== 懒加载指示器 ===== */
.lazy-loader {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px 20px;
    color: var(--text-secondary);
}

.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.loader-content span {
    font-size: 14px;
    color: var(--text-tertiary);
}

/* 旋转动画的加载器 */
.spinner {
    width: 30px;
    height: 30px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* SortableJS styles for drag and drop */
.sortable-ghost {
    opacity: 0.4;
    background-color: var(--hover-bg);
}

.sortable-chosen {
    /* Element being dragged */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    cursor: grabbing;
}

.sortable-drag {
    /* Original element being dragged (can hide if desired) */
    opacity: 0;
}

/* ===== 评论和笔记的展开/折叠按钮样式 ===== */
.btn-expand-comment,
.btn-expand-note {
    font-weight: 550;
    display: inline-block;
    margin-left: 6px;
    padding: 4px 8px;
    background: transparent;
    border: none;
    border-radius: 3px;
    color: var(--primary-color);
    cursor: pointer;
    transition: all 0.2s ease;
    vertical-align: baseline;
}

.btn-expand-comment:hover,
.btn-expand-note:hover {
    background: var(--primary-color-alpha);
}