:root{
  --bg:#f4f7fb;
  --surface:#ffffff;
  --surface-2:#eef4fb;
  --ink:#152033;
  --muted:#65758b;
  --soft:#8a9aaf;
  --line:#dbe4ef;
  --accent:#106bff;
  --accent-2:#00b8a9;
  --danger:#ef476f;
  --success:#10b981;
  --warning:#f59e0b;
  --shadow:0 24px 80px rgba(21,32,51,.12);
  --radius:22px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
html[data-theme="dark"]{
  --bg:#07101f;
  --surface:#0e1a2d;
  --surface-2:#12223a;
  --ink:#f7fbff;
  --muted:#b6c4d6;
  --soft:#8fa4bf;
  --line:#24344d;
  --accent:#59a5ff;
  --accent-2:#5eead4;
  --shadow:0 24px 80px rgba(0,0,0,.34);
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:linear-gradient(135deg,var(--bg),var(--surface-2));color:var(--ink);overflow:hidden}
button,input,select{font:inherit}
button{cursor:pointer}
.app-shell{height:100vh;width:100vw;display:grid;grid-template-rows:78px 1fr 74px;gap:12px;padding:12px}
.topbar,.workspace,.bottom-dock{background:rgba(255,255,255,.78);backdrop-filter:blur(18px);border:1px solid var(--line);box-shadow:var(--shadow)}
html[data-theme="dark"] .topbar,html[data-theme="dark"] .workspace,html[data-theme="dark"] .bottom-dock{background:rgba(14,26,45,.82)}
.topbar{border-radius:24px;display:grid;grid-template-columns:250px 1fr auto;align-items:center;gap:16px;padding:10px 14px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-mark{height:46px;width:46px;border-radius:16px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:white;display:grid;place-items:center;font-size:22px}
.brand strong{display:block;font-size:18px;line-height:1}
.brand small{display:block;color:var(--muted);font-weight:800;margin-top:2px}
.steps{display:flex;gap:8px;overflow:auto;justify-content:center;padding:4px}
.step-link{min-width:max-content;text-decoration:none;color:var(--muted);display:flex;align-items:center;gap:8px;border:1px solid transparent;padding:11px 13px;border-radius:999px;font-weight:900;font-size:13px;transition:.2s}
.step-link.active,.step-link:hover{background:var(--ink);color:var(--surface);border-color:var(--ink);transform:translateY(-1px)}
.top-actions{display:flex;gap:8px;align-items:center}
.icon-btn,.ghost-btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);min-height:42px;border-radius:14px;padding:0 12px;display:inline-flex;gap:8px;align-items:center;justify-content:center;font-weight:900;transition:.2s}
.icon-btn:hover,.ghost-btn:hover{transform:translateY(-1px);border-color:var(--accent)}
.workspace{border-radius:28px;display:grid;grid-template-columns:1fr 320px;gap:12px;padding:12px;min-height:0}
.module-stage{min-width:0;min-height:0;overflow:hidden}
.module-page{height:100%;display:grid;grid-template-rows:auto 1fr;gap:12px}
.module-header{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.module-kicker{display:inline-flex;gap:8px;color:var(--accent);font-weight:950;font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.module-header h1{margin:6px 0 5px;font-size:clamp(24px,3vw,38px);letter-spacing:-.055em;line-height:1}
.module-header p{margin:0;color:var(--muted);max-width:900px;line-height:1.45}
.shortcut-badge{background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:10px 13px;color:var(--muted);font-weight:950;white-space:nowrap}
.module-grid{min-height:0;display:grid;grid-template-columns:330px minmax(360px,1fr) 280px;gap:12px}
.tool-panel,.sheet-zone,.result-stack{min-height:0;background:var(--surface);border:1px solid var(--line);border-radius:24px;box-shadow:0 10px 34px rgba(21,32,51,.06)}
.tool-panel{padding:14px;overflow:auto}
.panel-title{margin-bottom:12px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.panel-title strong{display:block;font-size:18px}
.panel-title span{display:block;color:var(--muted);font-size:13px;margin-top:3px}
.field{display:block;margin-bottom:12px}
.field>span{display:flex;align-items:center;justify-content:space-between;gap:8px;color:var(--ink);font-size:13px;font-weight:950;margin-bottom:7px}
input,select{width:100%;min-height:42px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2);color:var(--ink);padding:9px 11px;outline:none}
input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 15%, transparent)}
.help-dot{height:22px;width:22px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--accent);font-weight:950;display:inline-grid;place-items:center}
.split{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.check-line{display:flex;align-items:center;gap:10px;margin:10px 0;padding:11px;border-radius:15px;background:var(--surface-2);color:var(--ink);font-weight:850}
.check-line input{width:18px;min-height:18px;accent-color:var(--accent)}
.sheet-zone{position:relative;display:grid;grid-template-rows:50px 1fr;overflow:hidden}
.sheet-toolbar{display:flex;justify-content:center;align-items:center;gap:8px;border-bottom:1px solid var(--line);background:var(--surface)}
.canvas-board{position:relative;overflow:hidden;display:grid;place-items:center;background:
  linear-gradient(var(--line) 1px, transparent 1px),
  linear-gradient(90deg,var(--line) 1px, transparent 1px);
  background-size:28px 28px;
}
.paper{position:relative;width:min(68%,520px);aspect-ratio:210/297;background:white;border:1px solid #cbd5e1;border-radius:8px;box-shadow:0 24px 80px rgba(21,32,51,.18);overflow:hidden;transition:.25s}
html[data-theme="dark"] .paper{background:#f8fafc}
.paper-grid{position:absolute;inset:0;background:
  linear-gradient(rgba(15,23,42,.08) 1px, transparent 1px),
  linear-gradient(90deg,rgba(15,23,42,.08) 1px, transparent 1px);
  background-size:24px 24px;
}
.safe-area{position:absolute;inset:8%;border:2px dashed rgba(16,107,255,.5);border-radius:4px}
.draggable-item{position:absolute;left:18%;top:18%;width:24%;height:18%;border-radius:6px;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 10px 24px rgba(16,107,255,.24);touch-action:none}
.ruler{position:absolute;background:rgba(255,255,255,.78);z-index:2;border-color:var(--line)}
.ruler-x{top:0;left:0;right:0;height:26px;border-bottom:1px solid var(--line);background-image:repeating-linear-gradient(90deg,transparent 0 18px,rgba(21,32,51,.34) 18px 19px)}
.ruler-y{top:0;bottom:0;left:0;width:26px;border-right:1px solid var(--line);background-image:repeating-linear-gradient(0deg,transparent 0 18px,rgba(21,32,51,.34) 18px 19px)}
.result-stack{display:grid;align-content:start;gap:10px;padding:12px;overflow:auto}
.result-card{border:1px solid var(--line);background:var(--surface-2);border-radius:18px;padding:14px}
.result-card small{display:block;color:var(--muted);font-weight:950;text-transform:uppercase;letter-spacing:.06em;font-size:11px;margin-bottom:8px}
.result-card strong{display:block;font-size:28px;line-height:1;letter-spacing:-.05em}
.result-card span,.result-card p{color:var(--muted);font-size:13px;line-height:1.45;margin:8px 0 0}
.hero-result{background:linear-gradient(135deg,var(--ink),color-mix(in srgb,var(--ink) 85%,var(--accent)));color:var(--surface)}
.hero-result small,.hero-result span{color:color-mix(in srgb,var(--surface) 75%, transparent)}
.wide{grid-column:1/-1}
.mini-table{display:grid;gap:8px}
.table-row{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;padding:9px 10px;border-radius:12px;background:var(--surface);border:1px solid var(--line);font-size:13px}
.checklist{margin:0;padding-left:18px;color:var(--ink);line-height:1.75}
.preset-grid{display:grid;grid-template-columns:1fr;gap:10px}
.preset-card{border:1px solid var(--line);background:var(--surface-2);color:var(--ink);padding:14px;border-radius:18px;text-align:left;display:grid;gap:4px;transition:.2s}
.preset-card:hover{transform:translateY(-1px);border-color:var(--accent)}
.preset-card i{font-size:22px;color:var(--accent)}
.preset-card span{color:var(--muted)}
.info-zone{display:grid;place-items:center}
.empty-state{max-width:420px;text-align:center;color:var(--muted);display:grid;gap:8px}
.empty-state i{font-size:54px;color:var(--accent)}
.empty-state strong{font-size:24px;color:var(--ink)}
.rightbar{display:grid;align-content:start;gap:12px;min-height:0;overflow:auto}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:15px}
.side-title{display:flex;gap:9px;align-items:center;margin-bottom:10px}
.side-title i{color:var(--accent)}
.side-card p{color:var(--muted);line-height:1.5;margin:0}
.switch-line{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--ink);font-weight:850;padding:10px 0;border-bottom:1px solid var(--line);font-size:13px}
.switch-line:last-child{border-bottom:0}
.switch-line input{width:18px;min-height:18px;accent-color:var(--accent)}
.metric-card strong{display:block;font-size:42px;letter-spacing:-.07em}
.metric-card small,.metric-card span{color:var(--muted);display:block}
.site-cta{display:flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;color:white;background:linear-gradient(135deg,var(--accent),var(--accent-2));border-radius:16px;min-height:46px;font-weight:950}
.bottom-dock{position:relative;border-radius:24px;padding:10px;display:flex;align-items:center;justify-content:center}
.dock-tabs{display:flex;gap:8px;max-width:100%;overflow:auto}
.dock-tab{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:11px 15px;font-weight:950}
.dock-tab.active{background:var(--ink);color:var(--surface)}
.dock-panel{position:absolute;left:50%;bottom:68px;transform:translate(-50%,16px) scale(.98);opacity:0;pointer-events:none;display:flex;gap:10px;padding:12px;border-radius:22px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:.22s;max-width:min(900px,90vw);overflow:auto}
.dock-panel.open{transform:translate(-50%,0) scale(1);opacity:1;pointer-events:auto}
.dock-action{min-width:150px;text-decoration:none;color:var(--ink);background:var(--surface-2);border:1px solid var(--line);border-radius:17px;padding:12px;display:grid;gap:6px;font-weight:900}
.dock-action i{font-size:22px;color:var(--accent)}
.modal-backdrop{position:fixed;inset:0;background:rgba(10,20,35,.38);display:none;place-items:center;z-index:99;padding:18px}
.modal-backdrop.open{display:grid}
.modal-card{width:min(560px,100%);background:var(--surface);border:1px solid var(--line);border-radius:26px;padding:24px;box-shadow:var(--shadow);position:relative;animation:pop .18s ease}
@keyframes pop{from{transform:translateY(12px) scale(.98);opacity:.3}to{transform:none;opacity:1}}
.modal-close{position:absolute;right:14px;top:14px;border:1px solid var(--line);background:var(--surface-2);border-radius:999px;height:38px;width:38px}
.modal-kicker{display:inline-flex;color:var(--accent);font-weight:950;text-transform:uppercase;font-size:12px;letter-spacing:.08em}
.modal-card h2{margin:8px 0;font-size:28px;letter-spacing:-.04em}
.modal-card p{color:var(--muted);line-height:1.6}
.easy-mode .field>span,.easy-mode .panel-title span,.easy-mode .module-header p{font-size:15px}
.easy-mode .help-dot{display:inline-grid}
.help-mode .field{outline:2px dashed color-mix(in srgb,var(--accent) 45%, transparent);outline-offset:3px;border-radius:12px}
.help-mode .field::after{content:"Ctrl + " attr(data-help-key);display:inline-flex;margin-top:4px;background:var(--accent);color:white;border-radius:999px;padding:3px 8px;font-size:11px;font-weight:950}
@media(max-width:1180px){
  body{overflow:auto}
  .app-shell{height:auto;min-height:100vh;grid-template-rows:auto auto auto}
  .workspace{grid-template-columns:1fr}
  .module-grid{grid-template-columns:1fr}
  .rightbar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .topbar{grid-template-columns:1fr;justify-items:stretch}
  .steps{justify-content:flex-start}
}
@media(max-width:720px){
  .app-shell{padding:8px}
  .split,.rightbar{grid-template-columns:1fr}
  .module-header{display:grid}
  .icon-btn span{display:none}
}