:root{--gem-blue: #4285f4;--gem-blue-500: #078efb;--gem-purple: #9b72cb;--gem-purple-400: #ac87eb;--gem-purple-500: #743ad5;--gem-red: #d96570;--gem-red-500: #d53a9d}.gem-gradient-bg{background:linear-gradient(135deg,var(--gem-blue) 0%,var(--gem-purple) 50%,var(--gem-red) 100%)}.gem-text{display:inline-block;background:linear-gradient(89.78deg,var(--gem-blue) 18.23%,var(--gem-purple) 33.43%,var(--gem-red) 48.03%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;padding-bottom:.1em}.gem-text-2{background:linear-gradient(90deg,var(--gem-blue-500) 0,var(--gem-purple-400) 66.7%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.reader-theme-light{--reader-bg: #ffffff;--reader-text: #1a1a1a;--reader-text-muted: #6b7280;--reader-header-bg: #ffffff;--reader-card-bg: #ffffff;--reader-border: #e5e7eb;--reader-hover: #f3f4f6;--reader-font-size: 18px}.reader-theme-sepia{--reader-bg: #f5f1e8;--reader-text: #3d3929;--reader-text-muted: #6b6555;--reader-header-bg: #ebe7de;--reader-card-bg: #faf8f3;--reader-border: #ddd8cb;--reader-hover: #e8e3d8;--reader-font-size: 18px}.reader-theme-dark{--reader-bg: #1a1a1a;--reader-text: #e5e5e5;--reader-text-muted: #9ca3af;--reader-header-bg: #262626;--reader-card-bg: #262626;--reader-border: #404040;--reader-hover: #333333;--reader-font-size: 18px}.reader-theme-dark-blue{--reader-bg: #0d1b2a;--reader-text: #e0e6ed;--reader-text-muted: #8b9db5;--reader-header-bg: #1b2838;--reader-card-bg: #1b2838;--reader-border: #2d3e50;--reader-hover: #243447;--reader-font-size: 18px}#book-reader{position:relative}#book-reader>header{position:fixed;top:0;left:0;right:0;z-index:100;transform:translateY(0);transition:transform .3s ease}#book-reader>header.header-hidden{transform:translateY(-100%)}.header-spacer{height:64px}.header-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid #e5e5e5;background:transparent;color:#bbb;cursor:pointer;transition:all .15s ease}.header-btn:hover{background:#fafafa;color:#888;border-color:#ddd}.header-btn.active{background:#f5f5f5;color:#666;border-color:#ccc}.header-btn svg{width:18px;height:18px}.header-popover{position:absolute;top:calc(100% + 8px);right:0;z-index:60;min-width:200px;background:#fff;border:1px solid #e5e7eb;border-radius:16px;box-shadow:0 8px 24px #0000001f;animation:header-popover-in .15s ease-out}.header-popover .popover-content{padding:16px}@keyframes header-popover-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.reader-sidebar{position:fixed;left:calc(50% - 520px);top:50%;transform:translateY(-50%);z-index:50;display:flex;flex-direction:column;gap:6px;padding:0;background:transparent;border:none;border-radius:0;box-shadow:none}@media (max-width: 1200px){.reader-sidebar{left:24px}}@media (max-width: 768px){.reader-sidebar{display:none}}.sidebar-btn{width:46px;height:46px;display:flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid #eee;background:transparent;color:#ccc;cursor:pointer;transition:all .15s ease}.sidebar-btn:hover{background:#fafafa;color:#999;border-color:#ddd}.sidebar-btn.active{background:#f8f8f8;color:#888;border-color:#078efb}.sidebar-btn svg{width:20px;height:20px;stroke-width:1.5}.reader-bottom-bar{display:none;position:fixed;bottom:0;left:0;right:0;z-index:50;padding:12px 16px;padding-bottom:calc(12px + env(safe-area-inset-bottom));background:var(--reader-card-bg);border-top:1px solid var(--reader-border);box-shadow:0 -4px 12px #00000014}@media (max-width: 768px){.reader-bottom-bar{display:flex;justify-content:space-around;align-items:center}}.bottom-bar-btn{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid var(--reader-border);background:var(--reader-card-bg);color:var(--reader-text-muted);cursor:pointer;transition:all .15s ease}.bottom-bar-btn:hover,.bottom-bar-btn:active{background:var(--reader-hover);color:var(--reader-text)}.bottom-bar-btn.active{background:var(--reader-hover);color:var(--reader-text);border-color:#078efb}.reader-main{max-width:680px;margin:0 auto;padding:32px 20px 100px}@media (min-width: 769px){.reader-main{padding:48px 24px;margin-left:auto;margin-right:auto}}.section-divider{border:none;border-top:1px solid #e5e5e5;margin:3rem 0}.section-label{display:inline-block;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.15em;margin-bottom:.75rem;background:linear-gradient(90deg,var(--gem-blue-500) 0%,var(--gem-purple-400) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.section-header{font-size:1.875rem;font-weight:700;margin-bottom:1.75rem;color:#1a1a1a;line-height:1.25}.sidebar-popover{position:absolute;left:calc(100% + 16px);top:0;z-index:60;min-width:200px;background:#fff;border:1px solid #e5e7eb;border-radius:16px;box-shadow:0 8px 24px #0000001f;animation:popover-in .15s ease-out}.sidebar-popover .popover-content{padding:16px}.mobile-popover{position:absolute;bottom:calc(100% + 12px);left:50%;transform:translate(-50%);z-index:60;min-width:240px;background:var(--reader-card-bg);border:1px solid var(--reader-border);border-radius:16px;box-shadow:0 -8px 24px #0000001f;animation:popover-in-mobile .15s ease-out}.mobile-popover .popover-content{padding:16px}@keyframes popover-in{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}@keyframes popover-in-mobile{0%{opacity:0;transform:translate(-50%) translateY(8px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.toc-list{list-style:none;padding:0;margin:0;max-height:300px;overflow-y:auto}.toc-list li{margin-bottom:4px}.toc-item{display:block;padding:8px 12px;color:var(--reader-text-muted);text-decoration:none;border-radius:8px;font-size:14px;line-height:1.4;transition:all .15s ease}.toc-item:hover{background:var(--reader-hover);color:var(--reader-text)}.toc-item.active{background:var(--reader-hover);color:var(--reader-text);font-weight:500}.toc-item-label{display:block;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--reader-text-muted);margin-bottom:2px}.toc-item-title{display:block;color:var(--reader-text);font-weight:500}.reader-prose{line-height:1.8;letter-spacing:.01em;color:#374151}.reader-prose *{color:inherit!important}.reader-prose .text-black,.reader-prose .text-white,.reader-prose .dark\:text-white,.reader-prose .dark\:text-black{color:var(--reader-text)!important}.reader-prose blockquote{background-color:var(--reader-hover)!important;border-color:var(--reader-border)!important}.reader-prose p{margin-bottom:1.5em}.reader-prose h1,.reader-prose h2,.reader-prose h3,.reader-prose h4{font-weight:600;line-height:1.3;margin-top:1.5em;margin-bottom:.75em}.reader-prose h1{font-size:calc(var(--reader-font-size) * 1.5)}.reader-prose h2{font-size:calc(var(--reader-font-size) * 1.3)}.reader-prose h3{font-size:calc(var(--reader-font-size) * 1.15)}.reader-prose h4{font-size:var(--reader-font-size)}.reader-prose ul,.reader-prose ol{margin-top:.75em;margin-bottom:1.25em;padding-left:1.5em}.reader-prose li{margin-bottom:.5em}.reader-prose blockquote{border-left:4px solid var(--reader-border);padding-left:1em;margin:1.25em 0;font-style:italic;color:var(--reader-text-muted)}.reader-prose strong{font-weight:600}.reader-prose em{font-style:italic}.theme-btn.active{border-color:#078efb!important;box-shadow:0 0 0 2px #078efb4d}#book-reader,#book-reader *{transition:background-color .2s ease,color .2s ease,border-color .2s ease}.summary-section{scroll-margin-top:24px}@media (max-width: 768px){.summary-section{scroll-margin-top:100px}}.line-clamp-1{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.line-clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}button:focus,a:focus,input:focus{outline:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid #078EFB;outline-offset:2px}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;height:6px;border-radius:3px;background:var(--reader-border, #e5e7eb)}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:#078efb;cursor:pointer;border:2px solid #ffffff;box-shadow:0 1px 3px #0003}input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#078efb;cursor:pointer;border:2px solid #ffffff;box-shadow:0 1px 3px #0003}.dig-deeper-card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:24px;box-shadow:0 1px 3px #0000000d}.dig-deeper-btn{display:flex;align-items:center;justify-content:center;width:100%;padding:12px 24px;border:2px solid #078EFB;border-radius:12px;color:#078efb;font-weight:600;font-size:16px;text-decoration:none;transition:all .15s ease}.dig-deeper-btn:hover{background:#078efb;color:#fff}.hidden{display:none!important}