:root {
  --color-bg: #0d0d0d;
  --color-panel: rgba(10, 8, 6, 0.7);
  --color-panel-border: rgba(180, 140, 80, 0.3);
  --color-text: #e8dcc8;
  --color-text-muted: #a09080;
  --color-accent: #c8a050;
  --color-accent-hover: #e0b860;
  --color-btn: rgba(30, 24, 16, 0.9);
  --color-btn-primary: rgba(150, 110, 40, 0.9);
  --color-btn-hover: rgba(200, 160, 60, 0.95);
  --radius: 8px;
  --sidebar-width: 300px;
  --transition: 0.3s ease;
  --font-main: 'Georgia', 'Times New Roman', serif;
  --font-ui: 'Segoe UI', system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; background: var(--color-bg); color: var(--color-text); font-family: var(--font-main); }
.novel-screen { position: relative; width: 100vw; height: 100vh; display: flex; flex-direction: column; overflow: hidden; }
.bg-wrap { position: absolute; inset: 0; z-index: 0; }
.bg-img { width: 100%; height: 100%; object-fit: cover; transition: opacity 0.6s ease; }
.bg-overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.15) 30%, rgba(0,0,0,0.6) 65%, rgba(0,0,0,0.92) 100%); }
.top-bar { position: relative; z-index: 10; display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: rgba(0,0,0,0.4); backdrop-filter: blur(4px); }
.location-counter { font-family: var(--font-ui); font-size: 0.8rem; color: var(--color-text-muted); white-space: nowrap; }
.progress-bar-wrap { flex: 1; height: 3px; background: rgba(255,255,255,0.15); border-radius: 2px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--color-accent); border-radius: 2px; transition: width 0.4s ease; width: 0%; }
.btn-icon { background: none; border: none; color: var(--color-text); font-size: 1.2rem; cursor: pointer; padding: 4px 8px; border-radius: 4px; transition: background var(--transition); line-height: 1; flex-shrink: 0; }
.btn-icon:hover { background: rgba(255,255,255,0.15); }
.content-panel { position: relative; z-index: 10; flex: 1; overflow-y: auto; padding: 20px 16px 8px; scrollbar-width: thin; scrollbar-color: var(--color-accent) transparent; }
.content-panel::-webkit-scrollbar { width: 4px; }
.content-panel::-webkit-scrollbar-thumb { background: var(--color-accent); border-radius: 2px; }
.content-inner { max-width: 720px; margin: 0 auto; background: var(--color-panel); border: 1px solid var(--color-panel-border); border-radius: var(--radius); padding: 24px 28px;}
.period-badge { display: inline-block; font-family: var(--font-ui); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent); border: 1px solid var(--color-panel-border); padding: 2px 10px; border-radius: 20px; margin-bottom: 12px; }
.loc-title { font-size: clamp(1.3rem, 4vw, 2rem); font-weight: 700; line-height: 1.2; color: #fff; margin-bottom: 16px; }
.loc-body { font-size: clamp(0.9rem, 2.2vw, 1rem); line-height: 1.75; color: var(--color-text); }
.loc-body p { margin-bottom: 1em; }
.loc-body p:last-child { margin-bottom: 0; }
.loc-address { margin-top: 18px; padding: 12px 16px; background: rgba(200, 160, 80, 0.08); border-left: 3px solid var(--color-accent); border-radius: 0 var(--radius) var(--radius) 0; font-family: var(--font-ui); font-size: 0.9rem; color: var(--color-text-muted); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.loc-address:empty { display: none; }
.btn-map { display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px; background: var(--color-btn-primary); color: var(--color-accent-hover); border: 1px solid var(--color-accent); border-radius: 20px; text-decoration: none; font-size: 0.82rem; font-family: var(--font-ui); transition: background var(--transition), color var(--transition); white-space: nowrap; }
.btn-map:hover { background: var(--color-btn-hover); color: #fff; }
.loc-facts, .loc-sources { margin-top: 14px; border: 1px solid var(--color-panel-border); border-radius: var(--radius); overflow: hidden; }
.loc-facts summary, .loc-sources summary { cursor: pointer; padding: 10px 16px; font-family: var(--font-ui); font-size: 0.85rem; color: var(--color-accent); user-select: none; list-style: none; background: rgba(200,160,80,0.06); transition: background var(--transition); }
.loc-facts summary::-webkit-details-marker, .loc-sources summary::-webkit-details-marker { display: none; }
.loc-facts summary::before, .loc-sources summary::before { content: '+ '; }
.loc-facts[open] summary::before, .loc-sources[open] summary::before { content: '- '; }
.loc-facts summary:hover, .loc-sources summary:hover { background: rgba(200,160,80,0.12); }
.loc-facts ul, .loc-sources ul { padding: 12px 16px 14px 32px; font-size: 0.88rem; color: var(--color-text-muted); line-height: 1.6; }
.loc-facts li, .loc-sources li { margin-bottom: 6px; }
.nav-controls { position: relative; z-index: 10; display: flex; gap: 10px; padding: 12px 16px; background: rgba(0,0,0,0.5); backdrop-filter: blur(4px); }
.btn-nav { flex: 1; padding: 12px 20px; border: 1px solid var(--color-panel-border); border-radius: var(--radius); background: var(--color-btn); color: var(--color-text); font-family: var(--font-ui); font-size: 0.9rem; cursor: pointer; transition: background var(--transition), border-color var(--transition); }
.btn-nav:hover { background: rgba(60, 48, 28, 0.95); border-color: var(--color-accent); }
.btn-nav:disabled { opacity: 0.35; cursor: default; }
.btn-nav--primary { background: var(--color-btn-primary); border-color: var(--color-accent); color: var(--color-accent-hover); font-weight: 600; }
.btn-nav--primary:hover { background: var(--color-btn-hover); color: #fff; }
.sidebar { position: fixed; top: 0; left: 0; height: 100%; width: var(--sidebar-width); max-width: 85vw; background: rgba(12, 10, 6, 0.97); border-right: 1px solid var(--color-panel-border); z-index: 100; display: flex; flex-direction: column; transform: translateX(-100%); transition: transform var(--transition); backdrop-filter: blur(12px); }
.sidebar.open { transform: translateX(0); }
.sidebar-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--color-panel-border); font-family: var(--font-ui); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-accent); }
.nav-list { flex: 1; overflow-y: auto; list-style: none; padding: 8px 0; scrollbar-width: thin; scrollbar-color: var(--color-accent) transparent; }
.nav-list li { display: flex; }
.nav-list button { flex: 1; background: none; border: none; text-align: left; padding: 10px 18px; color: var(--color-text-muted); font-family: var(--font-ui); font-size: 0.85rem; line-height: 1.3; cursor: pointer; transition: background var(--transition), color var(--transition); display: flex; align-items: baseline; gap: 8px; }
.nav-list button:hover { background: rgba(200,160,80,0.08); color: var(--color-text); }
.nav-list button.active { background: rgba(200,160,80,0.15); color: var(--color-accent); }
.nav-list .num { font-size: 0.72rem; color: var(--color-accent); flex-shrink: 0; width: 18px; text-align: right; }
.sidebar-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 99; opacity: 0; pointer-events: none; transition: opacity var(--transition); }
.sidebar-overlay.visible { opacity: 1; pointer-events: auto; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.content-inner { animation: fadeIn 0.35s ease; }
@media (max-width: 600px) { .content-inner { padding: 16px 14px; } .loc-title { font-size: 1.2rem; } .btn-nav { padding: 11px 10px; font-size: 0.82rem; } .top-bar { padding: 10px 12px; } .content-panel { padding: 14px 10px 6px; } }
@media (max-width: 400px) { .nav-controls { padding: 10px 10px; gap: 8px; } }