@import "https://fonts.googleapis.com/css2?family=Manrope:wght@500;600;700;800&family=Noto+Sans+SC:wght@500;700&display=swap";:root{--ink:#1d2e4a;--bg-a:#e6efff;--bg-b:#f7fbff;--shell-a:#f7fbff;--shell-b:#eef3ff;color:var(--ink);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Noto Sans SC,Manrope,PingFang SC,Hiragino Sans GB,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(circle at 80% -20%, #8ebaff42, transparent 35%), radial-gradient(circle at 8% 15%, #72a5fd2e, transparent 32%), linear-gradient(160deg, var(--bg-a) 0%, var(--bg-b) 62%);min-height:100svh;margin:0}#root{background:linear-gradient(170deg, var(--shell-a), var(--shell-b));border-left:1px solid #1e418117;border-right:1px solid #1e418117;width:min(780px,100%);min-height:100svh;margin:0 auto}button,input{font:inherit}.app-shell{min-height:100svh;padding:calc(10px + env(safe-area-inset-top,0px)) 16px calc(10px + env(safe-area-inset-bottom,0px));grid-template-rows:auto 1fr auto;gap:14px;display:grid}.top-bar{justify-content:space-between;align-items:center;gap:12px;display:flex}.score-group{gap:8px;display:flex}.score-pill{border-radius:12px;align-items:center;gap:8px;padding:8px 12px;display:flex;box-shadow:0 8px 22px -18px #162136e6}.score-pill--good{color:#0d7d3a;background:#dbf7e6}.score-pill--bad{color:#c92b37;background:#ffe4e5}.score-label{font-size:13px}.score-value{text-align:center;background:#ffffffa8;border-radius:8px;min-width:22px;padding:2px 6px;font-weight:700}.action-group{gap:8px;display:flex}.icon-btn{color:#223148;cursor:pointer;background:#fff;border:0;border-radius:12px;align-items:center;gap:6px;padding:8px 10px;font-size:13px;font-weight:600;display:inline-flex;box-shadow:0 10px 22px -18px #0a1736d9}.icon-btn svg{fill:currentColor;width:16px;height:16px}.quiz-area{align-content:start;justify-items:center;gap:12px;padding:8px 0 0;display:grid}.quiz-area h1{color:#13233d;margin:8px 0 2px;font-size:34px}.tag-row{gap:8px;display:flex}.tag-chip{color:#334563;background:#eaf0f8;border-radius:999px;padding:6px 10px;font-size:13px}.instruction{text-align:center;color:#2f4668;margin:6px 0 8px;font-size:15px}.play-orb{color:#fff;cursor:pointer;background:radial-gradient(circle at 30% 26%,#8f79ff 0%,#5f68fd 55%,#4562f5 100%);border:0;border-radius:999px;place-items:center;width:122px;height:122px;display:grid;position:relative;box-shadow:0 24px 40px -22px #4562f5e6}.play-orb__icon{z-index:2;background:#ffffff29;border-radius:999px;place-items:center;width:50px;height:50px;display:grid}.play-orb__icon svg{fill:currentColor;width:28px;height:28px}.orb-ripple{border-radius:inherit;border:2px solid #5f68fd57;animation:.66s ease-out ripple;position:absolute;inset:0}.hint-text{color:#4f6282;margin:2px 0 8px;font-size:14px}.playback-controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-top:-2px;display:flex}.mode-switch{background:#dde8ff;border-radius:10px;padding:2px;display:inline-flex}.mode-btn{color:#3b4f73;cursor:pointer;background:0 0;border:0;border-radius:8px;padding:7px 11px;font-size:13px;font-weight:700}.mode-btn.is-active{color:#fff;background:#2f68e0}.pause-btn{color:#fff;cursor:pointer;background:#274a87;border:0;border-radius:10px;padding:8px 14px;font-size:13px;font-weight:700}.pause-btn:disabled{opacity:.5;cursor:not-allowed}.options-area{gap:10px;width:min(100%,680px);margin-top:8px;display:grid}.answer-review{text-align:left;border-radius:14px;gap:6px;width:min(100%,680px);padding:12px 14px;display:grid}.answer-review.is-wrong{color:#8f2c43;background:#fff0f2}.answer-review h3{margin:0;font-size:16px}.answer-review p{margin:0;font-size:14px}.round-complete{color:#21406f;text-align:left;background:#e9f2ff;border-radius:14px;gap:8px;width:min(100%,680px);margin-top:8px;padding:12px 14px;display:grid}.round-complete strong{font-size:16px}.round-complete span{font-size:14px}.round-complete__btn{color:#fff;cursor:pointer;background:#2f68e0;border:0;border-radius:10px;justify-self:start;padding:8px 12px;font-weight:700}.option-item{text-align:left;color:#223554;cursor:pointer;background:#fff;border:0;border-radius:14px;padding:14px 16px;font-size:16px;font-weight:600;transition:transform .16s,box-shadow .2s,background .2s;box-shadow:0 12px 26px -22px #0c162af2}.option-item:hover{transform:translateY(-1px);box-shadow:0 16px 28px -20px #0f1c3080}.option-item.is-selected{color:#224fbe;background:#e9f0ff}.option-item.is-correct{color:#11783f;background:#dcfae8}.option-item.is-wrong{color:#cb2f43;background:#ffe5e8}.bottom-nav{grid-template-columns:1fr 1fr;gap:10px;padding-top:6px;display:grid}.nav-btn{cursor:pointer;border:0;border-radius:16px;padding:14px 10px;font-size:17px;font-weight:700}.nav-btn:disabled{opacity:.54;cursor:not-allowed}.nav-btn--prev{color:#344252;background:#dfe3ea}.nav-btn--next{color:#fff;background:#3d7afe}.settings-mask{padding:16px 14px calc(env(safe-area-inset-bottom,0px) + 116px);z-index:999;pointer-events:auto;background:#080f1f59;place-items:start center;display:grid;position:fixed;inset:0;overflow-y:auto}.settings-card{overscroll-behavior:contain;scrollbar-gutter:stable;pointer-events:auto;background:#fff;border-radius:16px;gap:14px;width:min(100%,420px);max-height:calc(100svh - 140px);padding:18px;display:grid;overflow-y:auto;box-shadow:0 22px 38px -26px #0a1a3af2}.settings-card h2{color:#1b2d4a;margin:0}.settings-subtitle{color:#597091;margin:-8px 0 0;font-size:13px}.settings-row{color:#304564;gap:6px;font-weight:600;display:grid}.settings-row input,.settings-row select{width:100%}.picker-trigger{color:#24406a;text-align:left;cursor:pointer;background:#edf3ff;border:0;border-radius:10px;padding:10px 12px;font-weight:700}.settings-row select{color:#1e3255;background:#f4f8ff;border:1px solid #ccd8f2;border-radius:10px;padding:9px 10px}.settings-actions{grid-template-columns:1fr 1fr;gap:8px;display:grid}.file-input-hidden{display:none}.settings-inline{color:#2f4568;background:#eef4ff;border-radius:12px;justify-content:space-between;align-items:center;padding:10px 12px;font-weight:700;display:flex}.settings-inline input{width:18px;height:18px}.settings-tip{color:#1d4faa;margin:-2px 0 0;font-size:13px}.close-btn{color:#fff;cursor:pointer;background:#2f68e0;border:0;border-radius:12px;padding:10px 12px;font-size:15px;font-weight:700}.inline-picker{background:#050e1d5c;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.inline-picker__panel{background:#fff;border-radius:14px;gap:10px;width:min(100%,420px);padding:14px;display:grid}.inline-picker__panel h3{color:#223a60;margin:0;font-size:16px}.inline-picker__options{flex-wrap:wrap;gap:8px;display:flex}.inline-picker__btn{color:#2d476f;cursor:pointer;background:#e8f0ff;border:0;border-radius:999px;padding:8px 12px;font-size:13px;font-weight:700}.inline-picker__btn.is-active{color:#fff;background:#2f68e0}.inline-picker__close{color:#2f466f;cursor:pointer;background:#dfe7f5;border:0;border-radius:10px;padding:8px 12px;font-weight:700}@keyframes ripple{0%{opacity:.78;transform:scale(1)}to{opacity:0;transform:scale(1.44)}}@media (width<=520px){.app-shell{padding:calc(8px + env(safe-area-inset-top,0px)) 10px calc(8px + env(safe-area-inset-bottom,0px))}.top-bar{flex-direction:column;align-items:start}.action-group{width:100%}.icon-btn{flex:1;justify-content:center}.quiz-area h1{font-size:30px}.option-item{font-size:15px}.nav-btn{padding:12px 8px;font-size:16px}}