*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#05060a;--primary:#1e7bff;--accent:#00e5ff;--text:#f2f5f7;--muted:#8a94a6;--surface:#05060ae6;--border:#f2f5f714;--radius:6px;--header-h:48px;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Inter,sans-serif}html,body,#root{background:var(--bg);width:100%;height:100%;color:var(--text);overflow:hidden}.app-layout{flex-direction:column;width:100%;height:100%;display:flex;overflow:hidden}.app-header{height:var(--header-h);border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(16px)saturate(180%);z-index:20;background:#05060af2;flex-shrink:0;align-items:center;padding:0 12px;display:flex;position:relative}.app-header-left{align-items:center;gap:6px;display:flex}.app-header-center{pointer-events:none;gap:8px;display:flex;position:absolute;left:50%;transform:translate(-50%)}.header-lang{gap:4px;display:flex}.app-header-right{align-items:center;gap:4px;margin-left:auto;display:flex}.app-body{flex:1;display:flex;overflow:hidden}.app-sidebar{background:var(--surface);-webkit-backdrop-filter:blur(16px)saturate(180%);border-right:1px solid var(--border);flex-shrink:0;width:260px;overflow-y:auto}.app-visual{background:var(--bg);flex:1;position:relative;overflow:hidden}.app-visual canvas{width:100%;height:100%;display:block}.app-visual:fullscreen{width:100vw;height:100vh}.app-visual:fullscreen{width:100vw;height:100vh}.start-screen{background:var(--bg);justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.start-card{border:1px solid var(--border);text-align:center;background:#1e7bff0a;border-radius:16px;flex-direction:column;align-items:center;gap:16px;max-width:420px;padding:48px 56px;display:flex}.start-logo{color:var(--accent);font-size:40px;line-height:1}.start-title-row{align-items:center;gap:12px;display:flex}.start-lang{gap:4px;padding-top:2px;display:flex}.start-title{letter-spacing:-.5px;color:var(--text);font-size:32px;font-weight:700}.start-subtitle{color:var(--muted);letter-spacing:.04em;font-size:14px}.start-hint{color:var(--muted);margin-top:4px;font-size:11px;line-height:1.6}.btn-primary{background:var(--primary);color:#fff;border-radius:var(--radius);cursor:pointer;letter-spacing:.02em;border:none;padding:12px 32px;font-size:15px;font-weight:600;transition:opacity .15s,transform 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