:root{--bg-0: #0b0d10;--bg-1: #111418;--bg-2: #161a20;--bg-3: #1c222a;--border: #262d36;--border-strong: #323a45;--text-0: #e6e9ee;--text-1: #b6bcc6;--text-2: #7f8897;--accent: #60a5fa;--accent-strong: #3b82f6;--danger: #ef4444;--success: #22c55e;--axis-x: #ef4444;--axis-y: #22c55e;--axis-z: #3b82f6;--shadow-panel: 0 10px 30px rgba(0, 0, 0, .35);--radius-sm: 4px;--radius-md: 6px;--radius-lg: 10px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;width:100%}body{background:var(--bg-0);color:var(--text-0);font-family:var(--font-sans);font-size:13px;line-height:1.4;-webkit-font-smoothing:antialiased;overflow:hidden}button{font-family:inherit;font-size:inherit;color:inherit;background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 10px;cursor:pointer;transition:background .12s ease,border-color .12s ease}button:hover:not(:disabled){background:var(--bg-3);border-color:var(--border-strong)}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}button.primary:hover:not(:disabled){background:var(--accent);border-color:var(--accent)}button.danger{background:#e11d48;border-color:#e11d48;color:#fff}button.danger:hover:not(:disabled){background:#f43f5e;border-color:#f43f5e}input,select{font-family:inherit;font-size:inherit;color:var(--text-0);background:var(--bg-1);border:1px solid var(--border);border-radius:var(--radius-sm);padding:4px 6px;outline:none}input:focus,select:focus{border-color:var(--accent)}.app-shell{display:grid;grid-template-rows:44px 1fr;grid-template-columns:1fr 320px;grid-template-areas:"toolbar toolbar" "viewer  panel";height:100%;width:100%}.toolbar{grid-area:toolbar;display:flex;align-items:center;gap:10px;padding:0 12px;background:var(--bg-1);border-bottom:1px solid var(--border)}.toolbar .brand{font-weight:600;letter-spacing:.2px;color:var(--text-0)}.toolbar .brand .brand-icon{margin-right:6px}.toolbar .spacer{flex:1}.language-select{margin-left:4px;min-width:72px;padding:5px 8px}.viewer{grid-area:viewer;position:relative;background:radial-gradient(circle at 50% 40%,#1a2029,#0b0d10 70%);overflow:hidden}.panel{grid-area:panel;background:var(--bg-1);border-left:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column}.panel .section{padding:10px 12px;border-bottom:1px solid var(--border)}.panel .section h3{margin:0 0 8px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-2)}.panel .row{display:grid;grid-template-columns:80px 1fr;gap:8px;align-items:center;margin-bottom:6px}.panel .row:last-child{margin-bottom:0}.panel .row label{color:var(--text-1)}.placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;pointer-events:none;color:var(--text-2)}.placeholder .hint{font-size:12px}.rotation-fix-overlay{position:absolute;inset:0;z-index:5;pointer-events:none;display:flex;flex-direction:column;align-items:center;padding:20px 12px}.rotation-fix-spacer{flex:1;min-height:0}.rotation-fix-controls{display:flex;flex-direction:column;align-items:center;gap:14px;pointer-events:none}.rotation-hint{padding:8px 14px;border-radius:var(--radius-md);background:#111418c2;border:1px solid rgba(96,165,250,.25);color:var(--text-1);font-size:12px;pointer-events:none;white-space:nowrap}.rotation-control-bar,.rotation-action-bar,.rotation-slider-bar{display:flex;align-items:center;gap:8px;padding:10px 12px;border:1px solid rgba(38,45,54,.95);border-radius:var(--radius-lg);background:#111418eb;box-shadow:var(--shadow-panel);pointer-events:auto}.rotation-slider-bar{width:min(420px,calc(100vw - 360px));gap:12px}.rotation-slider-label,.rotation-degree-unit{flex:0 0 auto;color:var(--text-2);font-size:12px;white-space:nowrap}.rotation-degree-input{flex:0 0 auto;width:72px;text-align:center;font-family:var(--font-mono);padding:4px 6px}.rotation-slider{flex:1;min-width:0;height:4px;appearance:none;-webkit-appearance:none;border:none;border-radius:999px;background:var(--border-strong);padding:0;cursor:pointer}.rotation-slider:focus{outline:none}.rotation-slider:focus-visible{box-shadow:0 0 0 2px #60a5fa59}.rotation-slider::-webkit-slider-runnable-track{height:4px;border-radius:999px;background:var(--border-strong)}.rotation-slider::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:16px;height:16px;margin-top:-6px;border-radius:50%;border:2px solid var(--accent-strong);background:var(--text-0);box-shadow:0 1px 4px #00000059}.rotation-slider::-moz-range-track{height:4px;border-radius:999px;background:var(--border-strong)}.rotation-slider::-moz-range-thumb{width:16px;height:16px;border-radius:50%;border:2px solid var(--accent-strong);background:var(--text-0);box-shadow:0 1px 4px #00000059}.rotation-control-bar input[type=number]{width:78px;text-align:center;font-family:var(--font-mono)}.rotation-control-bar label{display:inline-flex;align-items:center;gap:6px;color:var(--text-2)}.confirm-overlay{position:fixed;inset:0;z-index:20;display:flex;align-items:center;justify-content:center;padding:16px;background:#0000008c}.confirm-dialog{width:min(420px,100%);padding:16px 18px;border:1px solid var(--border-strong);border-radius:var(--radius-lg);background:var(--bg-1);box-shadow:var(--shadow-panel)}.confirm-dialog h4{margin:0 0 8px;font-size:14px;font-weight:600;color:var(--text-0)}.confirm-dialog p{margin:0 0 14px;font-size:12px;line-height:1.5;color:var(--text-1)}.confirm-dialog-actions{display:flex;justify-content:flex-end;gap:8px}