:root{--bg:#0f1115;--fg:#e7e9ee;--muted:#9aa3b2;--accent:#4ea1ff;--panel:#171a21;--border:#242936}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif}.app-header{padding:12px 16px;background:var(--panel);border-bottom:1px solid var(--border);font-weight:600;display:flex;justify-content:space-between;align-items:center}.lang-selector{background:#1e2430;color:var(--fg);border:1px solid var(--border);padding:6px 8px;border-radius:6px;cursor:pointer;font-size:13px;font-family:inherit}.lang-selector:hover{border-color:var(--accent)}.lang-selector:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px #4ea1ff33}.app-main{display:grid;grid-template-columns:1fr 320px;gap:12px;padding:12px}.viewer{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:8px;display:flex;flex-direction:column}.canvas-wrap{position:relative;flex:1;min-height:320px;background:#0b0d12;border:1px solid var(--border);border-radius:6px;overflow:hidden}canvas{position:absolute;inset:0;width:100%;height:100%}.splitter{position:absolute;top:0;bottom:0;width:2px;left:50%;background:var(--accent);opacity:.7;cursor:ew-resize}.meta{margin-top:8px;color:var(--muted);font-size:12px}.controls{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:12px;display:flex;flex-direction:column;gap:12px}.control-group{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}.control-group>label{grid-column:1/-1;color:var(--muted);font-size:12px}input[type=range]{width:100%}.value{font-variant-numeric:tabular-nums;color:var(--muted)}.checkbox{display:flex;align-items:center;gap:8px;color:var(--muted)}.buttons,.nav{display:flex;gap:8px;flex-wrap:wrap}button{background:#1e2430;color:var(--fg);border:1px solid var(--border);padding:8px 10px;border-radius:6px;cursor:pointer}button:hover{border-color:var(--accent)}.thumbnails{display:flex;gap:8px;overflow:auto;padding:8px 12px}.thumb{width:72px;height:72px;border:1px solid var(--border);border-radius:6px;overflow:hidden;cursor:pointer;opacity:.8}.thumb.active{outline:2px solid var(--accent);opacity:1}.thumb img{width:100%;height:100%;object-fit:cover;display:block}.dropzone{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:#4ea1ff14;border:2px dashed var(--accent);color:var(--accent);font-size:20px;z-index:10}.dropzone.active{display:flex}.info-block{margin-top:auto;padding-top:16px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:8px}.info-block .title{color:var(--fg);font-size:14px;font-weight:500}.info-block .btn-about{width:100%}.info-block .credit{color:var(--muted);font-size:11px;text-align:center;margin-top:4px}.content{padding:16px;max-width:800px;margin:0 auto}.content h1{margin:0 0 16px;font-size:24px}.content h2{margin:24px 0 12px;font-size:18px;border-bottom:1px solid var(--border);padding-bottom:8px}.content h3{margin:16px 0 8px;font-size:16px}.content p{margin:0 0 12px;line-height:1.6}.content ul,.content ol{margin:0 0 16px 16px;line-height:1.6}.content li{margin:0 0 8px}.content a{color:var(--accent);text-decoration:none}.content a:hover{text-decoration:underline}.app-footer{padding:16px;text-align:center;color:var(--muted);font-size:13px}.app-footer a{color:var(--accent);text-decoration:none}.app-footer a:hover{text-decoration:underline}.modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center}.modal[hidden]{display:none}.modal-overlay{position:absolute;inset:0;background:#000c;backdrop-filter:blur(4px)}.modal-content{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:8px;max-width:800px;max-height:90vh;overflow-y:auto;width:calc(100% - 32px);margin:16px}.modal-content .content{padding:24px;max-width:none}.modal-close{position:absolute;top:12px;right:12px;width:32px;height:32px;border:none;background:transparent;color:var(--fg);font-size:28px;line-height:1;cursor:pointer;z-index:1;border-radius:4px}.modal-close:hover{background:#ffffff1a}@media (max-width: 960px){.app-main{grid-template-columns:1fr}}