:root{--bg: #f3eadc;--paper: #fbf6ec;--ink: #2b2418;--muted: #6d6254;--line: #e2d5c0;--wine: #6b2424;--wine-deep: #4a1717;--gold: #9a7840;--ok: #2f5d3a;--warn: #8a4b1f;--shadow: 0 0 0 1px var(--line);--safe-top: env(safe-area-inset-top, 0px);--safe-bot: env(safe-area-inset-bottom, 0px)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;min-height:100%;background:#1c1611;color:var(--ink);font-family:Be Vietnam Pro,system-ui,sans-serif}body,#app{min-height:100dvh}.shell{width:min(430px,100%);height:100dvh;margin:0 auto;background:var(--bg);position:relative;display:flex;flex-direction:column;overflow:hidden}.top{position:relative;z-index:8;flex-shrink:0;padding:calc(14px + var(--safe-top)) 18px 14px;background:var(--bg);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px}.top h1,.top h2{margin:0;font-size:17px;font-weight:700;letter-spacing:-.02em;flex:1;line-height:1.25}.icon-btn{width:40px;height:40px;border:0;background:transparent;color:var(--ink);border-radius:12px;display:grid;place-items:center;cursor:pointer;flex-shrink:0}button,input{touch-action:manipulation}.page{flex:1;min-height:0;overflow-y:auto;padding:18px 18px 28px;-webkit-overflow-scrolling:touch}.kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);font-weight:600;margin:0 0 6px}.lede{margin:0 0 18px;color:var(--muted);font-size:14px;line-height:1.5}.hero{background:var(--wine-deep);color:#f6ead7;border-radius:18px;padding:20px 18px 18px;margin-bottom:18px}.hero .kicker{color:#d7b56a}.hero h2{margin:0 0 8px;font-size:22px;line-height:1.25}.hero p{margin:0;color:#e4d3b8;font-size:14px;line-height:1.5}.meter{margin-top:14px;height:8px;background:#3a1c1c;border-radius:99px;overflow:hidden}.meter>span{display:block;height:100%;background:#d7b56a}.stats{display:flex;gap:10px;margin:0 0 20px}.stat{flex:1;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px 12px}.stat b{display:block;font-size:20px;font-weight:700}.stat span{color:var(--muted);font-size:12px}.section-title{margin:8px 0 12px;font-size:13px;font-weight:600;color:var(--muted)}.card{display:flex;align-items:center;gap:14px;width:100%;text-align:left;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:12px;cursor:pointer;color:inherit;font:inherit}.card:active{background:#efe4d2}.num{width:36px;height:36px;border-radius:10px;background:var(--wine);color:#f6ead7;display:grid;place-items:center;font-weight:700;font-size:13px;flex-shrink:0}.num.done{background:var(--ok)}.card .meta{flex:1;min-width:0}.card .meta b{display:block;font-size:15px;line-height:1.35}.card .meta span{display:block;margin-top:4px;font-size:12px;line-height:1.4;color:var(--muted)}.pct{font-size:12px;font-weight:600;color:var(--wine)}.modes{display:flex;gap:8px;overflow-x:auto;margin:0 -18px 4px;padding:0 18px 16px;scrollbar-width:none}.modes::-webkit-scrollbar{display:none}.chip{border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:999px;padding:8px 14px;font:inherit;font-size:13px;font-weight:600;white-space:nowrap;cursor:pointer}.chip.on{background:var(--wine);border-color:var(--wine);color:#f6ead7}.kinh-box{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:18px 16px 14px;min-height:180px;margin-bottom:16px}.group-name{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);margin:12px 0 8px}.line{display:block;width:100%;text-align:left;background:transparent;border:0;border-radius:10px;padding:10px 8px;margin:0 0 8px;font-family:"Noto Serif",Be Vietnam Pro,serif;font-size:18px;line-height:1.7;color:var(--ink);cursor:pointer}.line.current{background:#efe0c4}.line.dim{color:var(--muted)}.line.hidden-line{color:var(--gold);letter-spacing:.04em}.line.cue{font-family:Be Vietnam Pro,sans-serif;font-size:15px;color:var(--muted)}.hint{margin:0 0 14px;font-size:13px;color:var(--muted);line-height:1.5}.icon-btn svg{display:block}.actions{position:static;margin:20px 0 8px;padding:0;background:none;display:flex;flex-direction:column;gap:10px}.btn{min-height:48px;border:0;border-radius:14px;font:inherit;font-weight:600;font-size:15px;cursor:pointer;padding:12px 16px}.btn.primary{background:var(--wine);color:#f6ead7}.btn.ghost{background:var(--paper);color:var(--ink);border:1px solid var(--line)}.row{display:flex;gap:10px}.row .btn{flex:1}.slider-wrap{margin:8px 0 14px}.slider-wrap label{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:6px;font-weight:600}input[type=range]{width:100%;accent-color:var(--wine)}.help ol{margin:0;padding:0 0 0 18px}.help li{margin:0 0 16px;line-height:1.55}.help li b{display:block;margin-bottom:4px}.order-item{width:100%;text-align:left;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px;font-family:"Noto Serif",Be Vietnam Pro,serif;font-size:16px;line-height:1.55;cursor:pointer;color:inherit}.order-item:active{background:#efe4d2}.order-item.wrong{border-color:var(--wine);animation:shake .35s ease}.done-stack{margin-bottom:14px}.done-stack p{margin:0 0 6px;font-family:"Noto Serif",Be Vietnam Pro,serif;color:var(--ok);font-size:15px;line-height:1.5}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.toast{position:fixed;left:50%;bottom:calc(88px + var(--safe-bot));transform:translate(-50%);background:var(--ink);color:#f6ead7;padding:10px 14px;border-radius:12px;font-size:13px;z-index:20}.quiz-prompt{margin:0;font-family:"Noto Serif",Be Vietnam Pro,serif;font-size:18px;line-height:1.7}.gap{display:inline-block;min-width:4.5em;border-bottom:2px solid var(--wine);margin:0 4px 2px;vertical-align:baseline}.quiz-field{width:100%;border:1px solid var(--line);background:var(--bg);border-radius:12px;padding:14px;font:inherit;font-size:16px;color:var(--ink);margin-top:14px;margin-bottom:0}.quiz-field:focus{outline:2px solid var(--wine);outline-offset:1px}.quiz-field:disabled{opacity:.85}.quiz-area{min-height:92px;resize:vertical;font-family:"Noto Serif",Be Vietnam Pro,serif;line-height:1.5}.quiz-right{border-color:var(--ok);color:var(--ok)}.result-ok,.result-bad{margin:6px 0 16px;font-size:14px;font-weight:600;line-height:1.5}.result-ok{color:var(--ok)}.result-bad{color:var(--wine)}.score-big{margin:8px 0 0;font-size:40px;font-weight:700;letter-spacing:-.04em}.quiz-result{min-height:160px}.progress-mini{font-size:12px;color:var(--muted);font-weight:600}.bottom-nav{position:relative;flex-shrink:0;z-index:10;display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:10px 12px calc(12px + var(--safe-bot));background:var(--paper);border-top:1px solid var(--line)}.nav-item{border:0;background:transparent;border-radius:12px;padding:10px 8px;font:inherit;color:var(--ink);display:flex;flex-direction:column;align-items:center;gap:4px;cursor:pointer}.nav-item b{font-size:14px}.nav-item span{font-size:11px;color:var(--muted)}.nav-item.on{background:#efe0c4}.nav-item.on b{color:var(--wine)}.order-item:disabled{opacity:1}