:root{--bg:#0d1117;--panel:#161d29;--panel2:#1c2534;--ink:#e9edf4;--ink-dim:#8b95a7;--accent:#36d1a0;--accent-ink:#06251b;--danger:#ff6b7a;--radius:14px;--safe-b:env(safe-area-inset-bottom,0px);--safe-t:env(safe-area-inset-top,0px)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{background:var(--bg);color:var(--ink);touch-action:none;-webkit-user-select:none;user-select:none;font-family:ui-rounded,SF Pro Rounded,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}#app{position:fixed;inset:0}#c3d{touch-action:none;width:100%;height:100%;display:block;position:absolute;inset:0}#topbar{padding:calc(8px + var(--safe-t)) 14px 8px;z-index:30;background:linear-gradient(#0d1117eb 0%,#0d111700 100%);align-items:center;gap:8px;display:flex;position:absolute;top:0;left:0;right:0}#logo{letter-spacing:-.5px;margin-right:auto;font-size:24px;font-style:italic;font-weight:800}#logo span{color:var(--accent)}.tb-btn{-webkit-backdrop-filter:blur(10px);width:40px;height:40px;color:var(--ink);cursor:pointer;background:#161d29bf;border:1px solid #fff2;border-radius:12px;place-items:center;display:grid}.tb-btn:active{background:var(--panel2);transform:scale(.94)}#regionbar{top:calc(60px + var(--safe-t));scrollbar-width:none;z-index:20;-ms-overflow-style:none;gap:6px;display:flex;position:absolute;left:10px;right:10px;overflow-x:auto;-webkit-mask-image:linear-gradient(90deg,#0000,#000 18px calc(100% - 24px),#0000);mask-image:linear-gradient(90deg,#0000,#000 18px calc(100% - 24px),#0000)}#regionbar::-webkit-scrollbar{display:none}.rchip{-webkit-backdrop-filter:blur(8px);color:var(--ink-dim);cursor:pointer;background:#161d29b8;border:1px solid #ffffff1a;border-radius:999px;flex:none;padding:7px 14px;font-size:13px;font-weight:600}.rchip.active{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}#hint{left:50%;bottom:calc(140px + var(--safe-b));color:var(--ink-dim);z-index:15;-webkit-backdrop-filter:blur(8px);pointer-events:none;white-space:nowrap;background:#161d29d9;border:1px solid #ffffff1a;border-radius:999px;padding:8px 18px;font-size:13px;transition:opacity .4s,transform .4s;position:absolute;transform:translate(-50%)}#hint.gone{opacity:0;transform:translate(-50%)translateY(8px)}#label-layer{pointer-events:none;z-index:12;position:absolute;inset:0}#label-line{background:var(--accent);height:2px;position:absolute;box-shadow:0 0 8px #36d1a088}#label-line:before{content:"";background:var(--accent);border-radius:50%;width:8px;height:8px;position:absolute;top:-3px;left:-3px}#label-tag{background:var(--accent);color:var(--accent-ink);white-space:nowrap;text-overflow:ellipsis;border-radius:10px;max-width:70vw;padding:8px 14px;font-size:15px;font-weight:700;position:absolute;overflow:hidden;box-shadow:0 6px 24px #0006,0 0 0 4px #36d1a022}#progress-pill{left:14px;bottom:calc(14px + var(--safe-b));z-index:14;-webkit-backdrop-filter:blur(8px);background:#161d29cc;border:1px solid #ffffff14;border-radius:8px;align-items:center;height:34px;display:flex;position:absolute;right:14px;overflow:hidden}#progress-bar{background:linear-gradient(90deg,#36d1a055,#36d1a0aa);width:0%;transition:width .5s cubic-bezier(.2,.8,.2,1);position:absolute;top:0;bottom:0;left:0}#progress-text{text-align:center;width:100%;color:var(--ink);letter-spacing:.5px;text-shadow:0 1px 2px #000a;font-size:12px;font-weight:700;position:relative}#credit{left:0;right:0;bottom:calc(52px + var(--safe-b));text-align:center;color:#ffffff38;z-index:13;pointer-events:none;letter-spacing:.3px;font-size:10px;position:absolute}#view-controls{z-index:14;flex-direction:column;gap:8px;display:flex;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.vc-btn{width:38px;height:38px;color:var(--ink);cursor:pointer;-webkit-backdrop-filter:blur(8px);background:#161d29bf;border:1px solid #ffffff1a;border-radius:11px;font-size:14px;font-weight:800}.vc-btn:active{background:var(--panel2);transform:scale(.92)}#loading{z-index:60;background:var(--bg);flex-direction:column;justify-content:center;align-items:center;gap:18px;transition:opacity .55s;display:flex;position:absolute;inset:0}#loading.done{opacity:0;pointer-events:none}#loading-text{color:var(--ink-dim);letter-spacing:.5px;font-size:15px}.bone-spin{border:3px solid #ffffff18;border-top-color:var(--accent);border-radius:50%;width:44px;height:44px;animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}#sheet{z-index:40;background:var(--panel);padding:8px 20px calc(20px + var(--safe-b));border-top:1px solid #ffffff14;border-radius:20px 20px 0 0;transition:transform .28s cubic-bezier(.2,.8,.2,1);position:absolute;bottom:0;left:0;right:0;transform:translateY(110%)}#sheet.open{transform:translateY(0)}#sheet.hidden{display:none}#sheet-grip{background:#ffffff2e;border-radius:3px;width:44px;height:5px;margin:4px auto 12px}.sh-title{letter-spacing:-.3px;font-size:24px;font-weight:800}.sh-sub{color:var(--ink-dim);margin-top:3px;font-size:14px}.sh-meta{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.chip{background:var(--panel2);color:var(--ink-dim);border:1px solid #ffffff12;border-radius:999px;padding:5px 11px;font-size:12px;font-weight:600}.sh-actions{gap:10px;margin-top:16px;display:flex}.sh-btn{background:var(--accent);color:var(--accent-ink);cursor:pointer;border:none;border-radius:12px;flex:1;padding:13px;font-size:15px;font-weight:700}.sh-btn.ghost{color:var(--ink);background:0 0;border:1px solid #ffffff26}.sh-btn:active{transform:scale(.97)}#list-overlay{z-index:50;-webkit-backdrop-filter:blur(16px);background:#0d1117f5;flex-direction:column;display:flex;position:absolute;inset:0}#list-overlay.hidden,#quiz-overlay.hidden{display:none}#list-head{padding:calc(10px + var(--safe-t)) 14px 10px;gap:10px;display:flex}#search-input{background:var(--panel2);color:var(--ink);border:1px solid #ffffff1c;border-radius:12px;outline:none;flex:1;padding:12px 16px;font-size:16px}#search-input:focus{border-color:var(--accent)}#list-close,#quiz-close{background:var(--panel2);width:46px;color:var(--ink);cursor:pointer;border:1px solid #ffffff1c;border-radius:12px;font-size:17px}#region-tabs{scrollbar-width:none;-ms-overflow-style:none;gap:6px;padding:0 14px 10px;display:flex;overflow-x:auto}#region-tabs::-webkit-scrollbar{display:none}.rtab{color:var(--ink-dim);cursor:pointer;background:0 0;border:1px solid #ffffff1a;border-radius:999px;flex:none;padding:7px 14px;font-size:13px;font-weight:600}.rtab.active{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}#list-body{padding:4px 14px calc(20px + var(--safe-b));flex:1;overflow-y:auto}.lg-title{text-transform:uppercase;letter-spacing:1.2px;color:var(--ink-dim);margin:18px 4px 8px;font-size:12px;font-weight:800}.litem{background:var(--panel);width:100%;color:var(--ink);cursor:pointer;text-align:left;border:1px solid #ffffff10;border-radius:12px;justify-content:space-between;align-items:center;margin-bottom:7px;padding:13px 14px;font-size:15px;font-weight:600;display:flex}.litem:active{background:var(--panel2)}.litem .lcheck{visibility:hidden;color:var(--accent);font-weight:800}.litem.learned .lcheck{visibility:visible}.lg-empty{text-align:center;color:var(--ink-dim);padding:40px 0}#quiz-overlay{z-index:45;pointer-events:none;background:#0d111780;flex-direction:column;display:flex;position:absolute;inset:0}#quiz-overlay>*{pointer-events:auto}#quiz-head{padding:calc(10px + var(--safe-t)) 14px 8px;align-items:center;gap:10px;width:fit-content;margin-left:auto;margin-right:44px;display:flex}#quiz-close{width:40px;height:40px;color:var(--ink);background:#161d29d9;border:1px solid #fff2;border-radius:12px;font-size:15px}#quiz-score{background:#161d29d9;border:1px solid #ffffff1a;border-radius:999px;padding:9px 16px;font-size:14px;font-weight:800}#quiz-prompt{top:calc(64px + var(--safe-t));white-space:nowrap;background:#161d29e6;border:1px solid #ffffff1a;border-radius:999px;padding:9px 18px;font-size:14px;font-weight:700;position:absolute;left:50%;transform:translate(-50%)}#quiz-choices{left:12px;right:12px;bottom:calc(64px + var(--safe-b));grid-template-columns:1fr 1fr;gap:8px;display:grid;position:absolute}.qchoice{color:var(--ink);cursor:pointer;background:#161d29eb;border:1px solid #ffffff1c;border-radius:14px;padding:15px 10px;font-size:14.5px;font-weight:700;transition:transform .1s}.qchoice:active{transform:scale(.96)}.qchoice.right{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.qchoice.wrong{background:var(--danger);color:#2b070c;border-color:var(--danger)}.qchoice:disabled{opacity:.92}#quiz-feedback{left:50%;bottom:calc(8px + var(--safe-b));white-space:nowrap;background:#161d29e6;border:1px solid #ffffff14;border-radius:999px;padding:8px 16px;font-size:14px;font-weight:700;position:absolute;transform:translate(-50%)}#quiz-feedback.good{color:var(--accent)}#quiz-feedback.bad{color:var(--danger)}@media (width>=760px){#regionbar{left:24px;right:24px}#topbar{padding:14px 24px 8px}#logo{font-size:28px}#quiz-choices{grid-template-columns:repeat(2,1fr);max-width:620px;margin:0 auto;left:0;right:0}#sheet{max-width:560px;margin:0 auto}.vc-btn{width:42px;height:42px}#view-controls{right:20px}}