:root{--ink: #1d2733;--paper: #fffdf5;--accent: #2ea6a0;--accent-deep: #1b7d78;--shadow: 0 10px 30px rgba(10, 30, 40, .25);--radius: 18px;font-size:16px}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:Avenir Next,Trebuchet MS,Verdana,system-ui,sans-serif;color:var(--ink);background:#0d1420;-webkit-tap-highlight-color:transparent;user-select:none;touch-action:none}#app{position:fixed;inset:0}#scene{position:absolute;inset:0;width:100%;height:100%;display:block}#loader{position:absolute;inset:0;z-index:50;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;text-align:center;background:radial-gradient(120% 120% at 50% 20%,#12333c,#0d1420 70%);color:#f2fbf9;transition:opacity .8s ease;padding:24px}#loader.done{opacity:0;pointer-events:none}#loader h1{font-size:clamp(26px,5vw,44px);line-height:1.1;letter-spacing:.5px}#loader h1 span{font-size:.55em;opacity:.8;font-weight:500}#loader-status{font-size:15px;opacity:.75}.loader-spark{width:56px;height:56px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#ffe9a8,#ffd166 45%,#f28c28 80%);box-shadow:0 0 40px #ffd16688;animation:spark-pulse 1.6s ease-in-out infinite}@keyframes spark-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.18)}}#topbar{position:absolute;top:0;left:0;right:0;z-index:20;display:flex;justify-content:space-between;align-items:flex-start;padding:calc(12px + env(safe-area-inset-top)) 16px 0 16px;pointer-events:none}#topbar>*{pointer-events:auto}#phase-badge{display:flex;align-items:center;gap:10px;background:var(--paper);border-radius:999px;padding:8px 16px 8px 8px;box-shadow:var(--shadow)}#phase-num{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;font-size:17px}#phase-name{font-weight:800;font-size:16px;letter-spacing:.3px}#topbar-right{display:flex;gap:8px;align-items:center}#spark-chip{display:flex;align-items:center;gap:8px;background:var(--paper);border-radius:999px;padding:6px 14px 6px 8px;box-shadow:var(--shadow);font-size:13px;font-weight:700;max-width:46vw}#spark-icon{width:26px;height:26px;border-radius:50%;flex:none;background:radial-gradient(circle at 35% 30%,#fdf6df,#d8c9a3);box-shadow:inset 0 0 0 2px #b7a87e;transition:background .6s ease}#spark-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chip-btn{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;border:none;cursor:pointer;background:var(--paper);color:var(--ink);box-shadow:var(--shadow);transition:transform .15s ease}.chip-btn:hover{transform:scale(1.1)}.chip-btn:active{transform:scale(.92)}.chip-btn[aria-pressed=true]{background:var(--accent);color:#fff}#info-card{position:absolute;left:16px;bottom:96px;z-index:20;max-width:min(460px,calc(100vw - 32px));background:var(--paper);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 18px;transform-origin:bottom left}#child-line{font-size:18px;font-weight:700;line-height:1.35}#tech-toggle{margin-top:10px;background:none;border:none;cursor:pointer;color:var(--accent-deep);font-weight:800;font-size:13px;padding:4px 0;letter-spacing:.3px;text-decoration:underline dotted}#tech-detail{margin-top:8px;font-size:13.5px;line-height:1.5;color:#3c4a58;border-top:1px dashed #cfd8dd;padding-top:8px}#tech-detail ul{padding-left:18px;display:grid;gap:4px}#tech-detail b{color:var(--ink)}#btn-rerun{position:absolute;right:16px;bottom:96px;z-index:20;display:flex;align-items:center;gap:7px;border:none;cursor:pointer;border-radius:999px;background:var(--paper);color:var(--ink);box-shadow:var(--shadow);padding:10px 16px;font:inherit;font-weight:800;font-size:14px;transition:transform .15s ease,background .3s ease}#btn-rerun:hover{transform:scale(1.06);background:#fff}#btn-rerun:active{transform:scale(.94)}#btn-tour{position:absolute;right:16px;top:calc(64px + env(safe-area-inset-top));z-index:20;border:none;cursor:pointer;border-radius:999px;background:#1d2733;color:#ffd166;box-shadow:var(--shadow);padding:8px 14px;font:inherit;font-weight:800;font-size:13px;transition:transform .15s ease}#btn-tour:hover{transform:scale(1.05)}#btn-tour.active{background:#ffd166;color:#1d2733}#navbar{position:absolute;left:50%;transform:translate(-50%);bottom:calc(14px + env(safe-area-inset-bottom));z-index:20;display:flex;align-items:center;gap:10px;background:var(--paper);border-radius:999px;box-shadow:var(--shadow);padding:8px 10px;max-width:calc(100vw - 24px)}#navbar button{font:inherit;cursor:pointer;border:none;background:none}#nav-prev,#nav-next{font-weight:800;font-size:15px;color:var(--accent-deep);display:flex;align-items:center;gap:4px;padding:8px 10px;border-radius:999px;transition:background .2s ease}#nav-prev span,#nav-next span{font-size:20px;line-height:.8}#nav-prev:hover,#nav-next:hover{background:#e8f4f3}#nav-prev[disabled],#nav-next[disabled]{opacity:.35;cursor:default;background:none}#phase-dots{display:flex;gap:6px;align-items:center}.dot{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:800;color:#51606d;background:#eceff1;transition:all .25s ease;position:relative}.dot:hover{transform:scale(1.15)}.dot.current{background:var(--accent);color:#fff;box-shadow:0 0 0 4px #2ea6a033;transform:scale(1.12)}.dot.visited:after{content:"";position:absolute;right:1px;top:1px;width:8px;height:8px;border-radius:50%;background:#ffd166;border:2px solid var(--paper)}#hint{position:absolute;left:50%;transform:translate(-50%);top:calc(66px + env(safe-area-inset-top));z-index:15;background:#131e29b8;color:#eef6f9;border-radius:999px;padding:7px 16px;font-size:13px;font-weight:600;pointer-events:none;opacity:0;transition:opacity .6s ease;white-space:nowrap;max-width:92vw;overflow:hidden;text-overflow:ellipsis}#hint.show{opacity:1}#help-overlay{position:absolute;inset:0;z-index:60;display:grid;place-items:center;background:#0a121c8c;backdrop-filter:blur(4px);padding:20px}#help-overlay[hidden]{display:none}.help-card{background:var(--paper);border-radius:24px;padding:26px 28px;max-width:480px;box-shadow:var(--shadow)}.help-card h2{font-size:24px;margin-bottom:14px}.help-card ul{list-style:none;display:grid;gap:10px;font-size:14.5px;line-height:1.45}.help-card li{padding-left:4px}#help-close{margin-top:18px;width:100%;border:none;cursor:pointer;background:var(--accent);color:#fff;font:inherit;font-weight:800;font-size:16px;padding:12px;border-radius:14px}#help-close:hover{background:var(--accent-deep)}@media(max-width:760px){#phase-name{font-size:14px;max-width:38vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#spark-chip{max-width:40vw;font-size:12px}#info-card{bottom:88px;left:10px;right:auto;padding:10px 14px;max-width:calc(100vw - 20px)}#child-line{font-size:15px}#tech-detail{font-size:12.5px}#btn-rerun{bottom:88px;right:10px;padding:9px 12px;font-size:13px}#btn-rerun span{display:none}#navbar{gap:3px;padding:6px 7px}#nav-prev,#nav-next{font-size:0;padding:10px}#nav-prev span,#nav-next span{font-size:22px}#phase-dots{gap:3px}.dot{width:23px;height:23px;font-size:10.5px}.dot.visited:after{width:6px;height:6px;border-width:1.5px}#hint{font-size:12px}#btn-tour{font-size:11.5px;padding:7px 10px}}@media(max-width:380px){.dot{width:21px;height:21px;font-size:10px}}