:root{
  --bg:#f5efe6; --card:#fffaf2; --ink:#2b1f16; --muted:#7a6857; --line:#e3d6c4;
  --cedar:#b9783f; --cedar-d:#8a5128; --green:#2f5d46; --amber:#ffb347;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#1d1611; --card:#2a2019; --ink:#f3e8da; --muted:#b9a891; --line:#43342a; --green:#6fb68f; }
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg); color:var(--ink);
  display:flex; flex-direction:column; min-height:100vh;
}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid var(--line)}
.eyebrow{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--cedar-d);font-weight:600}
h1{font-size:clamp(17px,2.4vw,24px);margin:2px 0 0;font-weight:700}
.badge{font-size:12px;padding:6px 10px;border-radius:999px;background:var(--green);color:#fff;white-space:nowrap}

.stage{flex:1;display:grid;grid-template-columns:1fr 340px;min-height:0}
.viewer{position:relative;min-height:460px;background:radial-gradient(ellipse at 50% 30%,#fff7ea 0%,#ead9c0 100%)}
@media (prefers-color-scheme: dark){ .viewer{background:radial-gradient(ellipse at 50% 30%,#4a382b 0%,#241a13 100%)} }
#c{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}
.loading{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);font-size:14px;pointer-events:none;transition:opacity .4s}
.tools{position:absolute;top:12px;right:12px;display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.tools button{font:inherit;font-size:12px;padding:7px 11px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer}
.tools button[aria-pressed=true]{background:var(--cedar);border-color:var(--cedar);color:#fff}
.hint{position:absolute;left:12px;bottom:10px;font-size:11px;color:var(--muted);pointer-events:none}
.planned{position:absolute;inset:0;display:grid;place-items:center;background:rgba(40,28,18,.45);backdrop-filter:blur(2px)}
.planned[hidden]{display:none}
.planned-card{background:var(--card);padding:22px 26px;border-radius:14px;max-width:340px;text-align:center;border:1px solid var(--line)}
.planned-card h3{margin:10px 0 6px}.planned-card p{margin:0;color:var(--muted);font-size:14px}
.pill{display:inline-block;font-size:11px;padding:4px 9px;border-radius:999px;background:var(--amber);color:#3b2400;font-weight:700}

.panel{padding:20px;background:var(--card);border-left:1px solid var(--line);display:flex;flex-direction:column;gap:6px;overflow:auto}
.step-no{font-size:12px;color:var(--cedar-d);font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.panel h2{margin:2px 0 4px;font-size:21px}
.panel p{margin:0 0 8px;line-height:1.55;color:var(--ink);font-size:14.5px}
.panel h4{margin:10px 0 4px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.panel ul{margin:0;padding-left:18px;font-size:14px;line-height:1.7}
.tip{margin-top:10px;padding:10px 12px;border-left:3px solid var(--amber);background:rgba(255,179,71,.12);font-size:13.5px;line-height:1.5;border-radius:0 8px 8px 0}
.tip b{color:var(--cedar-d)}
.nav{margin-top:auto;padding-top:14px;display:flex;gap:8px}
.nav button{flex:1;white-space:nowrap;font:inherit;font-size:14px;padding:11px 6px;border-radius:10px;cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--ink)}
.nav .primary{background:var(--green);border-color:var(--green);color:#fff;font-weight:600}
.nav button:disabled{opacity:.4;cursor:default}

.steps{position:relative;padding:14px 20px 10px;border-top:1px solid var(--line);background:var(--card)}
.steps ol{list-style:none;margin:0;padding:0;display:flex;gap:8px;overflow-x:auto;position:relative;padding-bottom:6px;scrollbar-width:thin}
.steps li{flex:1 0 118px;position:relative}
.steps li:not(:last-child)::after{content:"";position:absolute;left:46px;right:-6px;top:20px;height:3px;background:var(--line);border-radius:3px}
li.done::after{background:var(--green)!important}
.steps li button{width:100%;text-align:left;font:inherit;background:none;border:0;cursor:pointer;color:var(--ink);padding:0}
.dot{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--bg);border:3px solid var(--line);font-weight:700;font-size:14px;margin-bottom:8px;position:relative;z-index:1;transition:.25s}
.lbl{font-size:12.5px;line-height:1.3;font-weight:600;max-width:118px}
.sub{font-size:11px;color:var(--muted);margin-top:2px}
li.done .dot{background:var(--green);border-color:var(--green);color:#fff}
li.active .dot{background:var(--cedar);border-color:var(--amber);color:#fff;box-shadow:0 0 0 4px rgba(255,179,71,.3)}
li.st-planned .dot{border-style:dashed;color:var(--muted)}
li.st-planned .lbl{color:var(--muted)}
footer{font-size:11.5px;color:var(--muted);text-align:center;padding:8px 16px;background:var(--card)}

@media (max-width:860px){
  .stage{grid-template-columns:1fr;grid-template-rows:58vh auto;flex:none;min-height:auto}
  .viewer{min-height:0}
  .panel{border-left:0;border-top:1px solid var(--line)}
  .badge{display:none}
}