:root{color-scheme:dark;--bg:#07111f;--panel:#0e1b2e;--line:#233a55;--text:#f5f8fc;--muted:#9fb2c8;--cyan:#44d7e8;--green:#6ee7a8;--coral:#ff7d75;--yellow:#ffd166}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 20% 0,#173456 0,transparent 37%),linear-gradient(145deg,#07111f,#0a1525 58%,#091d2a);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}.shell{width:min(1500px,100%);margin:auto;padding:30px}.hero{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}.eyebrow{margin:0 0 8px;color:var(--cyan);font-size:.77rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.hero h1{margin:0;font-size:clamp(2rem,4vw,4.1rem);line-height:.98;letter-spacing:-.055em}.hero p:not(.eyebrow){max-width:720px;margin:13px 0 0;color:var(--muted);font-size:1.03rem}.legend{display:grid;grid-template-columns:repeat(2,max-content);gap:9px 18px;color:var(--muted);font-size:.82rem}.legend span{display:flex;align-items:center;gap:7px}.legend i{display:block;width:13px;height:13px;border-radius:4px}.legend .start{background:var(--green)}.legend .goal{background:var(--coral)}.legend .seen{background:#2e6782}.legend .route{background:var(--yellow)}.workspace{display:grid;grid-template-columns:245px minmax(0,1fr);overflow:hidden;border:1px solid rgba(128,175,210,.2);border-radius:22px;background:rgba(9,21,37,.78);box-shadow:0 30px 80px rgba(0,0,0,.3);backdrop-filter:blur(14px)}.controls{padding:22px;border-right:1px solid rgba(128,175,210,.15);background:rgba(15,31,51,.82)}label{display:block;margin-bottom:18px;color:var(--muted);font-size:.77rem;font-weight:760;letter-spacing:.05em;text-transform:uppercase}select,input[type=range]{width:100%;margin-top:8px}select{padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#091726;color:var(--text);font:inherit;text-transform:none;letter-spacing:0}.check{display:flex;align-items:center;gap:9px;text-transform:none;letter-spacing:0}.check input{width:18px;height:18px;accent-color:var(--cyan)}output{float:right;color:var(--cyan)}input[type=range]{accent-color:var(--cyan)}.buttonStack{display:grid;grid-template-columns:1fr 1fr;gap:9px}button{min-height:42px;border:1px solid var(--line);border-radius:10px;background:#142840;color:var(--text);font-weight:760;cursor:pointer}button:hover:not(:disabled){border-color:#4d789d;background:#1b3553}button:disabled{opacity:.42;cursor:not-allowed}.buttonStack .primary{grid-column:1/-1;border-color:transparent;background:linear-gradient(135deg,#25b9d2,#3f89e8);color:white}.tip{margin-top:20px;padding:13px;border:1px solid rgba(68,215,232,.16);border-radius:12px;background:rgba(68,215,232,.06);color:var(--muted);font-size:.77rem;line-height:1.55}.tip strong{color:var(--text)}.stage{min-width:0;padding:18px}canvas{display:block;width:100%;height:auto;border:1px solid #28435e;border-radius:14px;background:#091523;touch-action:none;cursor:crosshair}.statusbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 4px 0}.statusbar p{margin:0;color:var(--muted);font-size:.86rem}.statusbar dl{display:flex;gap:24px;margin:0}.statusbar dl div{display:grid;grid-template-columns:auto auto;gap:6px}.statusbar dt{color:var(--muted);font-size:.72rem;text-transform:uppercase}.statusbar dd{margin:0;color:var(--cyan);font-weight:800}footer{padding:18px 0 0;text-align:center;color:#70859c;font-size:.74rem}@media(max-width:850px){.shell{padding:16px}.hero{display:block}.legend{margin-top:16px}.workspace{grid-template-columns:1fr}.controls{border-right:0;border-bottom:1px solid rgba(128,175,210,.15)}.buttonStack{grid-template-columns:repeat(4,1fr)}.buttonStack .primary{grid-column:auto}.tip{display:none}.statusbar{align-items:flex-start;flex-direction:column}.statusbar dl{width:100%;justify-content:space-between}}@media(max-width:560px){.buttonStack{grid-template-columns:1fr 1fr}.buttonStack .primary{grid-column:1/-1}.stage{padding:9px}.hero h1{font-size:2.4rem}}