:root{--bg:#07111e;--panel:rgba(9,18,32,.78);--line:rgba(226,232,240,.16);--text:#eef6ff;--muted:#9fb3c8;--cyan:#38bdf8;--gold:#facc15}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Segoe UI",sans-serif}button,input{font:inherit}button{border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.09);color:var(--text);border-radius:999px;padding:9px 12px;font-weight:800}button:active{transform:translateY(1px)}.shell{position:fixed;inset:0;overflow:hidden;background:radial-gradient(circle at 50% 35%,#132c4c 0,#07111e 55%,#020617 100%)}#scene{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}.topbar{position:absolute;left:16px;right:16px;top:14px;display:flex;align-items:center;gap:12px;z-index:2}.back{width:40px;height:40px;display:grid;place-items:center;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid var(--line);color:#dbeafe;text-decoration:none;font-size:22px;font-weight:900}.eyebrow{margin:0;color:#7dd3fc;letter-spacing:.14em;font-size:11px;font-weight:900}.topbar h1{margin:2px 0 0;font-size:clamp(22px,4vw,38px);line-height:1;letter-spacing:-.04em}.topbar #reset{margin-left:auto}.readout{position:absolute;top:86px;left:16px;z-index:2;display:flex;gap:8px;flex-wrap:wrap;align-items:center;max-width:min(520px,calc(100% - 32px));padding:10px 12px;border:1px solid var(--line);border-radius:16px;background:rgba(2,6,23,.52);backdrop-filter:blur(12px);box-shadow:0 12px 30px rgba(0,0,0,.25)}.readout span{color:#cbd5e1;font-size:13px}.panel{position:absolute;right:16px;bottom:16px;z-index:2;width:min(360px,calc(100% - 32px));padding:14px;border:1px solid var(--line);border-radius:22px;background:var(--panel);backdrop-filter:blur(16px);box-shadow:0 20px 60px rgba(0,0,0,.35)}.panel-head{display:flex;justify-content:space-between;gap:8px;margin-bottom:12px}.panel-head strong{font-size:15px}.panel-head span{font-size:12px;color:var(--muted);text-align:right}.panel label{display:grid;grid-template-columns:86px 52px 1fr;gap:8px;align-items:center;margin:10px 0;color:#dbeafe;font-size:13px}.panel output{color:var(--gold);font-variant-numeric:tabular-nums;text-align:right;font-weight:900}.panel input{width:100%;accent-color:var(--cyan)}.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:10px 0;color:#dbeafe;font-size:13px}.toggle-row button{min-width:64px;padding:8px 12px;font-size:12px}.toggle-row button.active{background:linear-gradient(135deg,#e0f2fe,#93c5fd);color:#03111f;border:0}.mode-row{display:grid;grid-template-columns:76px 1fr;gap:8px;align-items:center;margin:10px 0;color:#dbeafe;font-size:13px}.mode-buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.mode-buttons button{font-size:11px;padding:8px 4px}.mode-buttons button.active{background:linear-gradient(135deg,#f8fafc,#93c5fd);color:#03111f;border:0}.buttons{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}.buttons button{font-size:12px;padding:9px 6px}.buttons button.active{background:linear-gradient(135deg,#38bdf8,#22c55e);color:#03111f;border:0}.note{position:absolute;left:16px;bottom:16px;z-index:2;width:min(360px,calc(100% - 32px));padding:13px 14px;border:1px solid rgba(56,189,248,.28);border-radius:18px;background:rgba(8,47,73,.58);backdrop-filter:blur(12px)}.note b{color:#bae6fd}.note p{margin:6px 0 0;color:#dbeafe;font-size:13px;line-height:1.55}@media(max-width:760px){.topbar{left:12px;right:12px;top:10px}.back{width:36px;height:36px}.topbar h1{font-size:24px}.topbar #reset{padding:8px 10px;font-size:12px}.readout{top:70px;left:12px;right:12px}.panel{left:12px;right:12px;bottom:12px;width:auto;border-radius:18px;padding:12px}.panel label{grid-template-columns:76px 44px 1fr;margin:8px 0}.note{display:none}.buttons{gap:6px}.buttons button{font-size:11px}.shell:after{content:"";position:absolute;left:0;right:0;bottom:0;height:238px;background:linear-gradient(transparent,rgba(2,6,23,.42));pointer-events:none}}.editor-box{margin-top:12px;padding-top:12px;border-top:1px solid var(--line);display:grid;gap:10px}.editor-head{display:flex;justify-content:space-between;gap:8px;align-items:center}.editor-head span{color:var(--muted);font-size:12px}.interaction-row{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:4px;border:1px solid var(--line);border-radius:999px;background:rgba(2,6,23,.34)}.interaction-row button{padding:8px 6px;font-size:12px;border-color:transparent}.interaction-row button.active{background:linear-gradient(135deg,#38bdf8,#a7f3d0);color:#03111f}.brush-row{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.brush-row button{padding:8px 6px;font-size:12px}.brush-row button.active{background:#dffcf7;color:#052e2b;border-color:transparent}body[data-interaction="view"] .brush-row,body[data-interaction="view"] #brush,body[data-interaction="view"] #clearEdits{opacity:.55}body[data-interaction="view"] .brush-row button{border-style:dashed}.editor-box #clearEdits{width:100%;border-radius:14px;color:#fecdd3;background:rgba(244,63,94,.12)}@media(max-width:760px){.panel{max-height:56vh;overflow-y:auto;overscroll-behavior:contain}.brush-row{grid-template-columns:repeat(2,1fr)}}
/* proto17 realism pass: keep the Earth visible while controls stay available */
.panel-head{align-items:center}.panel-head #panelToggle{margin-left:auto;padding:6px 10px;font-size:12px;border-color:rgba(125,211,252,.28);background:rgba(14,165,233,.14);color:#dff7ff}.panel-collapsed .panel{width:auto;min-width:112px;padding:10px 12px;border-radius:999px}.panel-collapsed .panel-head{margin:0}.panel-collapsed .panel-head span,.panel-collapsed .panel label,.panel-collapsed .panel .toggle-row,.panel-collapsed .panel .mode-row,.panel-collapsed .panel .buttons,.panel-collapsed .panel .editor-box{display:none}.panel-collapsed .panel-head strong{font-size:12px;white-space:nowrap}.note{max-width:min(430px,calc(100% - 32px));background:rgba(3,10,22,.48)}
@media(max-width:640px){.panel{max-height:46vh;overflow:auto}.panel-collapsed .panel{max-height:none;overflow:visible}.readout{top:76px}.note{display:none}.topbar h1{font-size:21px}.topbar #reset{padding:8px 10px}.panel-head{gap:6px}.panel-head span{font-size:11px}.panel-head #panelToggle{padding:6px 9px}}

/* proto19 seeded terrain UI */
#seedInput{grid-column:2/4;width:100%;min-width:0;color:#e0f2fe;background:rgba(2,6,23,.35);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:7px 9px}#randomSeed{width:100%;border-color:rgba(125,211,252,.32);background:rgba(14,165,233,.16);color:#e0faff}.panel-collapsed .panel #randomSeed{display:none}