/* EpubFile Reader — Redesign v3
   哲学：书是主角，UI 是框架。直线、空白、克制。 */

:root {
    --app-bg: #faf9f7;
    --sidebar-bg: #f2f0ec;
    --popover-bg: #ffffff;
    --reader-bg: #faf9f7;

    --text-main: #1c1917;
    --text-sec: #78716c;
    --text-tertiary: #a8a29e;
    --accent: #b45309;
    --accent-light: #fef3c7;
    --btn-text: #ffffff;

    --border: rgba(28, 25, 23, 0.08);
    --border-strong: rgba(28, 25, 23, 0.16);
    --shadow-sm: rgba(28, 25, 23, 0.06);
    --shadow-md: rgba(28, 25, 23, 0.14);

    --hover-bg: rgba(28, 25, 23, 0.05);
    --active-bg: rgba(180, 83, 9, 0.08);

    --sidebar-width: 48px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);

    --transition-fast: 0.12s ease;
    --transition-normal: 0.22s ease;
    --transition-slow: 0.36s cubic-bezier(0.25, 1, 0.5, 1);

    --book-shadow:
        -4px 0 8px rgba(0,0,0,0.14),
        0 8px 24px rgba(0,0,0,0.10),
        0 2px 6px rgba(0,0,0,0.07);
    --book-shadow-hover:
        -6px 0 16px rgba(0,0,0,0.20),
        0 16px 40px rgba(0,0,0,0.14),
        0 4px 10px rgba(0,0,0,0.09);
}

* {
    margin: 0; padding: 0;
    box-sizing: border-box;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--app-bg);
    color: var(--text-main);
    height: 100vh;
    height: 100dvh;
    min-height: -webkit-fill-available;
    overflow: hidden;
    display: flex;
    font-size: 13px;
    -webkit-font-smoothing: antialiased;
}

/* ============================================================
   侧边导航 — 纵向工具栏
   ============================================================ */
#main-nav {
    width: var(--sidebar-width);
    height: 100%;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 0 calc(12px + var(--safe-bottom));
    z-index: 200;
    flex-shrink: 0;
    transition: transform var(--transition-slow), opacity var(--transition-slow);
}

body.reader-immersive #main-nav {
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
    position: absolute;
}

/* 移动端:点击阅读区域中部后,通过 JS 加上这个 class 来呼出导航条 */
body.reader-immersive.mobile-nav-open #main-nav {
    transform: translateX(0);
    opacity: 1;
    pointer-events: all;
}

#nav-trigger {
    display: none;
    position: fixed;
    left: 0; top: 0;
    width: 20px; height: 100%;
    z-index: 190;
}
body.reader-immersive #nav-trigger { display: block; }
body.reader-immersive #nav-trigger:hover ~ #main-nav,
body.reader-immersive #main-nav:hover {
    transform: translateX(0);
    opacity: 1;
    pointer-events: all;
}

.nav-group-top {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 8px;
    flex-shrink: 0;
}
.nav-group-middle {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 2px;
    flex: 1;
    padding-top: 6px;
}
#group-library, #group-reader {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 2px;
}
.nav-group-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    gap: 2px;
    flex-shrink: 0;
    position: relative;
}

.nav-logo {
    width: 20px; height: 20px;
    margin-bottom: 4px;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}
.nav-logo:hover { opacity: 0.7; }
.nav-logo svg { width: 100%; height: 100%; fill: var(--accent); }

/* 导航按钮 — 扁平，无背景，左侧高亮条 */
.nav-item {
    width: var(--sidebar-width);
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: 18px;
    transition: color var(--transition-fast);
    position: relative;
    text-decoration: none;
}
.nav-item:hover { color: var(--text-main); }
.nav-item.active { color: var(--accent); }
.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    transform: translateY(-50%);
    width: 2px; height: 20px;
    background: var(--accent);
}

.nav-divider {
    width: 24px; height: 1px;
    background: var(--border);
    margin: 4px 0;
}

/* ============================================================
   侧滑面板 — 设置 / 目录
   ============================================================ */
.side-panel {
    position: absolute;
    left: var(--sidebar-width);
    top: 0; bottom: 0;
    width: 272px;
    background: var(--popover-bg);
    border-right: 1px solid var(--border);
    z-index: 150;
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    box-shadow: 8px 0 32px var(--shadow-md);
    display: flex;
    flex-direction: column;
}
.side-panel.open { transform: translateX(0); }
body.reader-immersive .side-panel { left: 0; }

.panel-header {
    height: 44px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-weight: 600;
    font-size: 12px;
    letter-spacing: 0.6px;
    text-transform: uppercase;
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    padding-bottom: calc(8px + var(--safe-bottom));
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
.panel-content::-webkit-scrollbar { width: 4px; }
.panel-content::-webkit-scrollbar-thumb { background: var(--border); }

.toc-item {
    padding: 10px 16px;
    font-size: 13px;
    color: var(--text-sec);
    cursor: pointer;
    border-left: 2px solid transparent;
    transition: all var(--transition-fast);
    line-height: 1.4;
}
.toc-item:hover { color: var(--text-main); background: var(--hover-bg); }
.toc-item.active {
    border-left-color: var(--accent);
    color: var(--accent);
    background: var(--active-bg);
    font-weight: 500;
}

/* ============================================================
   设置面板内容
   ============================================================ */
.setting-block {
    padding: 16px;
    border-bottom: 1px solid var(--border);
}
.setting-block:last-child { border-bottom: none; }

.setting-title {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-tertiary);
    letter-spacing: 0.8px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 10px;
}

.options-grid { display: grid; gap: 6px; }

/* 选项按钮 — 线框风格，无多余圆角 */
.option-btn {
    border: 1px solid var(--border-strong);
    background: transparent;
    padding: 0 10px;
    height: 32px;
    border-radius: 3px;
    cursor: pointer;
    color: var(--text-sec);
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all var(--transition-fast);
    font-family: inherit;
}
.option-btn i { font-size: 14px; }
.option-btn:hover { color: var(--text-main); background: var(--hover-bg); }
.option-btn.selected {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--active-bg);
    font-weight: 600;
}

/* 主题色点 — 更大，6列 grid */
.theme-circle-container {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
}
.theme-circle {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 3px;
    cursor: pointer;
    border: 2px solid transparent;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
    position: relative;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
    flex-shrink: 0;
}
.theme-circle:hover { transform: scale(1.08); }
.theme-circle.selected {
    border-color: var(--accent);
    transform: scale(1.08);
}
.theme-circle.selected::after {
    content: "\EB7B";
    font-family: "remixicon";
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 13px;
    color: rgba(0,0,0,0.5);
    mix-blend-mode: multiply;
}

/* Custom 颜色条 — 全宽横栏 */
.custom-color-picker {
    grid-column: 1 / -1;
    height: 28px;
    border-radius: 3px;
    background: conic-gradient(red, yellow, lime, aqua, blue, magenta, red);
    position: relative;
    cursor: pointer;
    border: 2px solid transparent;
    margin-top: 2px;
    display: block;
    aspect-ratio: unset;
    transition: opacity var(--transition-fast);
    opacity: 0.82;
    box-shadow: none;
}
.custom-color-picker:hover { opacity: 1; }
.custom-color-picker::after {
    content: 'Custom';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: rgba(255,255,255,0.95);
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    pointer-events: none;
    font-family: inherit;
    mix-blend-mode: normal;
}
.custom-color-picker input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    border-radius: inherit;
}

/* Font size slider */
.setting-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.font-val-display {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}
.range-wrap { position: relative; }
.range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 7px;
    font-size: 10px;
    color: var(--text-tertiary);
    user-select: none;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 2px;
    background: var(--border-strong);
    border-radius: 1px;
    display: block;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(180,83,9,0.35);
    transition: transform var(--transition-fast);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
input[type="range"]::-moz-range-thumb {
    width: 14px; height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    cursor: pointer;
}

/* ============================================================
   全局设置菜单
   ============================================================ */
#global-settings-menu {
    position: absolute;
    left: 54px;
    bottom: 8px;
    width: 196px;
    background: var(--popover-bg);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    box-shadow: 0 8px 32px var(--shadow-md), 0 2px 8px var(--shadow-sm);
    z-index: 300;
    display: none;
    flex-direction: column;
    padding: 4px;
    animation: menuIn 0.16s ease;
    max-height: 420px;
    overflow-y: auto;
    scrollbar-width: none;
}
#global-settings-menu::-webkit-scrollbar { display: none; }

@keyframes menuIn {
    from { opacity: 0; transform: translateX(-6px); }
    to   { opacity: 1; transform: translateX(0); }
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 8px 10px;
    border-radius: 3px;
    cursor: pointer;
    color: var(--text-main);
    font-size: 12.5px;
    transition: background var(--transition-fast);
}
.menu-item:hover { background: var(--hover-bg); }
.menu-item i,
.menu-item svg {
    font-size: 14px;
    color: var(--text-tertiary);
    width: 16px;
    flex-shrink: 0;
}
.menu-item.danger { color: #c0392b; }
.menu-item.danger i,
.menu-item.danger svg { color: #c0392b; }
.menu-item.danger:hover { background: rgba(192,57,43,0.06); }
.menu-sep { height: 1px; background: var(--border); margin: 4px 0; }
.menu-section-label {
    font-size: 9.5px;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--text-tertiary);
    padding: 8px 10px 3px;
}

/* ============================================================
   主内容区
   ============================================================ */
#main-area {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background: var(--app-bg);
}

/* ============================================================
   阅读头部
   ============================================================ */
#reader-header {
    height: 44px;
    display: none;
    align-items: center;
    padding: 0 16px;
    background: var(--app-bg);
    border-bottom: 1px solid var(--border);
    z-index: 50;
    justify-content: space-between;
    transition: opacity var(--transition-normal);
}
#reader-header.fade-out { opacity: 0; pointer-events: none; }

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 80%;
    overflow: hidden;
}
.breadcrumb {
    display: flex;
    align-items: center;
    font-size: 12.5px;
    gap: 8px;
    overflow: hidden;
    white-space: nowrap;
}
.crumb-book {
    color: var(--text-sec);
    cursor: pointer;
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color var(--transition-fast);
}
.crumb-book:hover { color: var(--accent); }
.crumb-sep { color: var(--text-tertiary); font-size: 10px; }
.crumb-chapter {
    color: var(--text-main);
    font-weight: 500;
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-close-book {
    width: 28px; height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color var(--transition-fast);
    font-size: 16px;
    border-radius: 3px;
}
.btn-close-book:hover { color: var(--text-main); background: var(--hover-bg); }

/* ============================================================
   阅读底部
   ============================================================ */
#reader-footer {
    height: 32px;
    background: var(--app-bg);
    border-top: 1px solid var(--border);
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    font-size: 11px;
    color: var(--text-tertiary);
    z-index: 100;
    position: relative;
    padding-bottom: var(--safe-bottom);
    box-sizing: content-box;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    font-variant-numeric: tabular-nums;
}
#reader-footer.visible,
#reader-footer:hover { opacity: 1; pointer-events: all; }

#footer-trigger {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 80px;
    z-index: 99;
    pointer-events: none;
}
body.reader-active #footer-trigger { pointer-events: all; }
body.reader-active #footer-trigger:hover ~ #reader-footer,
body.reader-active #reader-footer:hover { opacity: 1; pointer-events: all; }

#progress-line-container {
    position: absolute;
    top: -1px; left: 0;
    width: 100%; height: 1px;
    background: var(--border);
}
#progress-line {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.5s ease;
}
.footer-info-left, .footer-info-right { color: var(--text-tertiary); }

/* ============================================================
   视图切换
   ============================================================ */
.view-page { display: none; width: 100%; height: 100%; flex-direction: column; }
.view-page.active { display: flex; }

/* ============================================================
   书库页
   ============================================================ */
#library-view {
    padding: 0;
    overflow-y: auto;
    background: var(--app-bg);
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
#library-view::-webkit-scrollbar { width: 5px; }
#library-view::-webkit-scrollbar-thumb { background: var(--border); }

.lib-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 28px 40px 20px;
    border-bottom: 1px solid var(--border);
}
.lib-title-group h1 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.4px;
    margin-bottom: 2px;
}
.lib-title-group p {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Import 按钮 — 简洁扁平 */
.btn-import {
    background: var(--accent);
    color: #fff;
    padding: 0 16px;
    height: 34px;
    border-radius: 3px;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    gap: 6px;
    align-items: center;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    border: none;
    letter-spacing: 0.1px;
    font-family: inherit;
}
.btn-import:hover { opacity: 0.88; }
.btn-import:active { opacity: 0.78; transform: scale(0.98); }

/* ============================================================
   书本网格
   ============================================================ */
.book-grid-wrap {
    padding: 32px 40px 48px;
}
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
    gap: 32px 24px;
}

.book-card {
    cursor: pointer;
    transition: transform var(--transition-normal);
    position: relative;
}
.book-card:hover { transform: translateY(-6px); }
.book-card:active { transform: translateY(-2px); }

.book-cover-wrap {
    perspective: 600px;
    margin-bottom: 12px;
}
.book-cover {
    aspect-ratio: 1/1.52;
    background: var(--sidebar-bg);
    border-radius: 2px 5px 5px 2px;
    overflow: hidden;
    box-shadow: var(--book-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-sec);
    position: relative;
    transition: box-shadow var(--transition-normal);
}
.book-card:hover .book-cover { box-shadow: var(--book-shadow-hover); }

/* 书脊 */
.book-cover::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 10px;
    background: linear-gradient(to right, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0.06) 60%, transparent 100%);
    z-index: 2;
    border-radius: 2px 0 0 2px;
}
/* 封面光泽 */
.book-cover::after {
    content: '';
    position: absolute;
    top: 0; left: 10px; right: 0; bottom: 0;
    background: linear-gradient(120deg, rgba(255,255,255,0.12) 0%, transparent 45%);
    z-index: 2;
    pointer-events: none;
}
.book-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }

.book-no-cover {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px;
    width: 100%; height: 100%;
    background: linear-gradient(145deg, var(--sidebar-bg) 0%, rgba(28,25,23,0.06) 100%);
}
.book-no-cover i { font-size: 28px; color: var(--text-tertiary); }
.book-no-cover-title {
    font-size: 11px;
    color: var(--text-sec);
    text-align: center;
    line-height: 1.4;
    font-weight: 500;
    max-width: 90%;
    word-break: break-word;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 进度条 */
.cover-progress {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    color: rgba(255,255,255,0.9);
    font-size: 10px;
    font-weight: 600;
    padding: 4px 8px 4px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 3;
}
.cover-progress-bar {
    position: absolute;
    bottom: 0; left: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition-normal);
    z-index: 4;
}

.book-meta h3 {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 3px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}
.book-meta p {
    font-size: 11px;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 删除按钮 */
.book-card-actions {
    position: absolute;
    top: 7px; right: 7px;
    z-index: 10;
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.book-card:hover .book-card-actions { opacity: 1; }
.btn-book-delete {
    width: 26px; height: 26px;
    border-radius: 3px;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(4px);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-sec);
    font-size: 13px;
    transition: all var(--transition-fast);
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}
.btn-book-delete:hover { background: #fff; color: #c0392b; border-color: #f5c6c6; }

/* ============================================================
   空状态
   ============================================================ */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    text-align: center;
}
.empty-state-shelf {
    position: relative;
    width: 180px; height: 120px;
    margin-bottom: 28px;
}
.empty-state-shelf::after {
    content: '';
    position: absolute;
    bottom: 0; left: -20px; right: -20px;
    height: 2px;
    background: var(--border-strong);
}
.shelf-book {
    position: absolute;
    bottom: 2px;
    border-radius: 1px 3px 3px 1px;
}
.shelf-book-1 { left: 8px;  width: 32px; height: 90px;  background: var(--border); opacity: 0.45; }
.shelf-book-2 { left: 46px; width: 24px; height: 104px; background: var(--border); opacity: 0.32; }
.shelf-book-3 { left: 76px; width: 36px; height: 82px;  background: var(--border); opacity: 0.38; }
.shelf-book-4 { left: 118px;width: 28px; height: 96px;  background: var(--border); opacity: 0.28; }
.shelf-book-5 { left: 152px;width: 20px; height: 72px;  background: var(--border); opacity: 0.22; }
.empty-state h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
    letter-spacing: -0.2px;
}
.empty-state p {
    font-size: 13px;
    color: var(--text-sec);
    line-height: 1.6;
    max-width: 260px;
    margin-bottom: 24px;
}

#library-view.drag-over .book-grid {
    outline: 2px dashed var(--accent);
    outline-offset: 8px;
    background: var(--active-bg);
}

/* ============================================================
   书签页
   ============================================================ */
#notes-view { overflow-y: auto; scrollbar-width: thin; }
.notes-inner { max-width: 680px; margin: 0 auto; padding: 36px 32px; }
.notes-inner h2 { font-size: 18px; font-weight: 700; letter-spacing: -0.3px; margin-bottom: 4px; }
.notes-subtitle { font-size: 12px; color: var(--text-sec); margin-bottom: 24px; }

.note-row {
    padding: 14px 16px;
    border: 1px solid var(--border);
    cursor: pointer;
    margin-bottom: 8px;
    background: var(--popover-bg);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    border-radius: 2px;
}
.note-row::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 2px;
    background: var(--accent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.note-row:hover { border-color: var(--border-strong); transform: translateX(2px); }
.note-row:hover::before { opacity: 1; }
.note-book-title {
    font-size: 10px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.6px;
    color: var(--accent); margin-bottom: 3px;
}
.note-chapter { font-weight: 600; font-size: 13.5px; color: var(--text-main); margin-bottom: 4px; line-height: 1.3; }
.note-preview {
    font-size: 12px; color: var(--text-sec); line-height: 1.5; margin-bottom: 7px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
    font-style: italic;
}
.note-info { font-size: 11px; color: var(--text-tertiary); display: flex; gap: 12px; align-items: center; }

/* ============================================================
   阅读器
   ============================================================ */
#reader-view { background: var(--reader-bg); position: relative; }
#epub-viewer { width: 100%; flex: 1; max-width: 1600px; margin: 0 auto; padding-top: 4px; }

.page-arrow {
    position: absolute;
    top: 0; bottom: 40px;
    width: 72px;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.page-arrow:hover { opacity: 1; }
.page-arrow-left { left: 0; }
.page-arrow-right { right: 0; }
.page-arrow-inner {
    width: 36px; height: 36px;
    border-radius: 3px;
    background: var(--popover-bg);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-sec);
    font-size: 17px;
    box-shadow: 0 2px 8px var(--shadow-sm);
    transition: all var(--transition-fast);
}
.page-arrow:hover .page-arrow-inner {
    background: var(--app-bg);
    color: var(--text-main);
    border-color: var(--border-strong);
}


/* ============================================================
   确认模态框
   ============================================================ */
#confirm-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(28,25,23,0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}
.confirm-modal {
    background: var(--popover-bg);
    width: 300px;
    max-width: 90%;
    border-radius: 4px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 16px 48px rgba(0,0,0,0.18);
    border: 1px solid var(--border);
    animation: modalIn 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.confirm-modal h3 { font-size: 15px; font-weight: 700; margin-bottom: 7px; color: var(--text-main); }
.confirm-modal p  { font-size: 12.5px; color: var(--text-sec); margin-bottom: 20px; line-height: 1.5; }
.confirm-actions { display: flex; gap: 8px; justify-content: center; }
.btn-confirm-cancel {
    padding: 8px 18px;
    border-radius: 3px;
    border: 1px solid var(--border-strong);
    background: transparent;
    color: var(--text-main);
    font-size: 13px; font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
    font-family: inherit;
}
.btn-confirm-cancel:hover { background: var(--hover-bg); }
.btn-confirm-delete {
    padding: 8px 18px;
    border-radius: 3px;
    border: none;
    background: #c0392b;
    color: #fff;
    font-size: 13px; font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-fast);
    font-family: inherit;
}
.btn-confirm-delete:hover { opacity: 0.88; }

/* ============================================================
   Toast
   ============================================================ */
#toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--text-main);
    color: var(--app-bg);
    padding: 9px 18px;
    border-radius: 3px;
    font-size: 12.5px; font-weight: 500;
    z-index: 2000;
    opacity: 0;
    transition: all var(--transition-normal);
    pointer-events: none;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============================================================
   拖拽遮罩
   ============================================================ */
#drag-overlay {
    position: fixed; inset: 0;
    background: rgba(180,83,9,0.06);
    border: 2px dashed var(--accent);
    z-index: 500;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}
#drag-overlay.active { display: flex; }
#drag-overlay i { font-size: 44px; color: var(--accent); opacity: 0.65; }
#drag-overlay p { font-size: 16px; font-weight: 600; color: var(--accent); }

/* ============================================================
   移动端
   ============================================================ */
@media (max-width: 600px) {
    .lib-header { flex-direction: column; align-items: flex-start; gap: 14px; padding: 20px; }
    .lib-title-group h1 { font-size: 18px; }
    .btn-import { width: 100%; justify-content: center; height: 42px; }
    .book-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 24px 14px; }
    .book-grid-wrap { padding: 20px; }
    #reader-footer { opacity: 1; pointer-events: all; }

    /* 移动端：箭头变成透明的左右半屏点击热区，不显示视觉按钮 */
    .page-arrow {
        top: 10%;
        bottom: 60px;   /* 避开底部 footer 区域 */
        width: 40%;
        opacity: 1;
        background: transparent;
    }
    .page-arrow-left  { left: 0; }
    .page-arrow-right { right: 0; }
    .page-arrow-inner { display: none; }  /* 隐藏视觉按钮，保留点击区域 */
}
@media (max-width: 400px) {
    .book-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 18px 10px; }
}

/* ============================================================
   主题色块 — 新版 swatch + label 设计
   ============================================================ */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-bottom: 8px;
}
.theme-swatch {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    padding: 8px 4px 6px;
    border: 1px solid var(--border);
    border-radius: 3px;
    cursor: pointer;
    background: transparent;
    transition: all var(--transition-fast);
    font-family: inherit;
}
.theme-swatch:hover { border-color: var(--border-strong); }
.theme-swatch.selected {
    border-color: var(--accent);
    background: var(--active-bg);
}
.sw-bg {
    width: 28px;
    height: 18px;
    border-radius: 2px;
    background: var(--sw);
    border: 1px solid rgba(0,0,0,0.10);
    display: block;
    flex-shrink: 0;
}
.sw-label {
    font-size: 9.5px;
    color: var(--text-sec);
    letter-spacing: 0.1px;
    white-space: nowrap;
}
.theme-swatch.selected .sw-label { color: var(--accent); font-weight: 600; }

/* Custom color 行 */
.theme-custom-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border: 1px dashed var(--border-strong);
    border-radius: 3px;
    cursor: pointer;
    color: var(--text-sec);
    font-size: 12px;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    width: 100%;
    font-family: inherit;
    background: transparent;
}
.theme-custom-row:hover { color: var(--text-main); border-color: var(--border-strong); background: var(--hover-bg); }
.theme-custom-row svg { flex-shrink: 0; opacity: 0.7; }
.theme-custom-row input[type="color"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
    border: none;
    padding: 0;
}
.theme-custom-row.selected { border-color: var(--accent); color: var(--accent); }

/* Remove old circle styles */
.theme-circle-container, .theme-circle, .custom-color-picker { display: none; }

/* ============================================================
   Bookmarks 页面 — 重新设计
   ============================================================ */
#notes-view {
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
#notes-view::-webkit-scrollbar { width: 4px; }
#notes-view::-webkit-scrollbar-thumb { background: var(--border); }

.notes-page {
    max-width: 640px;
    margin: 0 auto;
    padding: 40px 32px 64px;
    width: 100%;
}
.notes-page-header {
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.notes-page-header h1 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.4px;
    color: var(--text-main);
    margin-bottom: 4px;
}
.notes-page-header p {
    font-size: 12px;
    color: var(--text-tertiary);
}

.note-group {
    margin-bottom: 28px;
}
.note-group-title {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}
.note-group-book {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-tertiary);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.note-group-count {
    font-size: 10px;
    color: var(--text-tertiary);
    background: var(--hover-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1px 7px;
    flex-shrink: 0;
    font-variant-numeric: tabular-nums;
}

.note-row {
    border-left: 2px solid var(--border);
    padding: 0;
    margin-bottom: 1px;
    cursor: pointer;
    transition: border-color var(--transition-fast);
    background: transparent;
}
.note-row:hover { border-left-color: var(--accent); }
.note-row:hover .note-row-inner { background: var(--hover-bg); }
.note-row-inner {
    padding: 10px 12px;
    transition: background var(--transition-fast);
}
.note-chapter {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
    line-height: 1.35;
}
.note-preview {
    font-size: 12px;
    color: var(--text-sec);
    line-height: 1.55;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.note-meta {
    font-size: 10.5px;
    color: var(--text-tertiary);
    font-variant-numeric: tabular-nums;
}

.notes-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 60px 0;
    gap: 10px;
    text-align: center;
    color: var(--text-tertiary);
}
.notes-empty p {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-sec);
    margin: 0;
}
.notes-empty span {
    font-size: 12px;
    max-width: 220px;
    line-height: 1.5;
}