:root{--bg: #f5f6f8;--panel: #ffffff;--ink: #1c2333;--muted: #5b6472;--line: #e3e6ec;--accent: #2f6fed;--accent-ink: #ffffff;--ok: #1f9d55;--ok-bg: #e5f6ec;--bad: #d64545;--bad-bg: #fdeaea;--chip-bg: #eef1f6;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--ink)}#app{display:flex;flex-direction:column;height:100vh}header.appbar{display:flex;align-items:center;gap:16px;padding:10px 18px;background:var(--panel);border-bottom:1px solid var(--line)}header.appbar h1{font-size:17px;margin:0;font-weight:650}header.appbar .sub{color:var(--muted);font-size:12.5px}.spacer{flex:1}.unit-toggle{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden}.unit-toggle button{border:0;background:var(--panel);padding:6px 14px;font-size:13px;cursor:pointer;color:var(--muted)}.unit-toggle button.active{background:var(--accent);color:var(--accent-ink)}.layout{flex:1;display:flex;min-height:0}aside.panel{width:330px;min-width:330px;overflow-y:auto;background:var(--panel);border-right:1px solid var(--line);padding:14px 16px 24px}.presets{display:flex;gap:8px;margin-bottom:14px}.presets button{flex:1;padding:7px 0;border:1px solid var(--line);border-radius:8px;background:var(--panel);font-size:13px;cursor:pointer}.presets button:hover{border-color:var(--accent);color:var(--accent)}section.group{margin-bottom:18px}details.advanced{margin-bottom:18px;border-top:1px solid var(--line);padding-top:4px}details.advanced>summary{cursor:pointer;font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);padding:8px 0;-webkit-user-select:none;user-select:none;list-style-position:inside}details.advanced>summary:hover{color:var(--accent)}details.advanced[open]>summary{margin-bottom:8px}section.group>h2{font-size:11.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:0 0 8px}.field{margin-bottom:10px}.field label{display:block;font-size:13px;margin-bottom:3px}.field .row{display:flex;align-items:center;gap:8px}.field input[type=number],.field select{width:100px;padding:6px 8px;font-size:13.5px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--ink)}.field select{width:100%}.field input[type=range]{flex:1;accent-color:var(--accent)}.field .unit{font-size:12px;color:var(--muted);width:22px}.field .derived{font-size:11.5px;color:var(--muted);margin-top:2px}.field .error{display:none;font-size:11.5px;color:var(--bad);margin-top:2px}.field.invalid input[type=number]{border-color:var(--bad);background:var(--bad-bg)}.field.invalid .error{display:block}.custom-bed{display:none;gap:8px}.custom-bed.visible{display:flex}.custom-bed input{width:70px}.card{border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:12.5px;background:#fafbfd}.card h3{margin:0 0 8px;font-size:13px}.card table{width:100%;border-collapse:collapse}.card td{padding:2.5px 0;vertical-align:top}.card td:first-child{color:var(--muted);padding-right:10px;white-space:nowrap}.card .note{margin-top:8px;color:var(--muted);font-size:11.5px}main.viewport{flex:1;position:relative;min-width:0}#preview{position:absolute;top:0;right:0;bottom:0;left:0}#preview canvas{display:block}.chips{position:absolute;top:12px;left:12px;display:flex;flex-wrap:wrap;gap:8px;max-width:calc(100% - 160px)}.chip{background:var(--chip-bg);border-radius:999px;padding:5px 12px;font-size:12.5px;color:var(--ink);box-shadow:0 1px 2px #141e3c14}.chip.ok{background:var(--ok-bg);color:var(--ok)}.chip.bad{background:var(--bad-bg);color:var(--bad)}.viewbtns{position:absolute;top:12px;right:12px;display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel)}.viewbtns button{border:0;background:transparent;padding:6px 12px;font-size:12.5px;cursor:pointer;color:var(--muted)}.viewbtns button.active{background:var(--accent);color:var(--accent-ink)}.actionbar{display:flex;align-items:center;gap:10px;padding:10px 18px;background:var(--panel);border-top:1px solid var(--line)}.actionbar .status{font-size:12.5px;color:var(--muted)}button.primary{background:var(--accent);color:var(--accent-ink);border:0;border-radius:8px;padding:9px 18px;font-size:14px;font-weight:600;cursor:pointer}button.primary:disabled{background:#aab6cc;cursor:not-allowed}button.secondary{background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:8px 16px;font-size:13.5px;cursor:pointer}button.secondary:hover{border-color:var(--accent);color:var(--accent)}footer.disclaimer{padding:8px 18px;font-size:11.5px;color:var(--muted);background:var(--panel);border-top:1px solid var(--line)}dialog{border:0;border-radius:12px;padding:22px;max-width:460px;box-shadow:0 12px 40px #141e3c40}dialog::backdrop{background:#14192873}dialog h3{margin-top:0}dialog p{font-size:13.5px;line-height:1.5}dialog .dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:14px}@media (max-width: 900px){.layout{flex-direction:column}aside.panel{width:100%;min-width:0;border-right:0;border-bottom:1px solid var(--line)}main.viewport{min-height:420px}}