/* ===== Bốc thẻ / Luyện tập nhanh ===== */
.fl-tool .left-tool{display:flex;flex-direction:column;align-items:stretch}
.fl-board{position:relative;width:100%;max-width:760px;margin:0 auto;min-height:min(560px,calc(100vh - 200px));background:#fff;border:1px solid #eceef1;border-radius:22px;padding:22px 24px 20px;box-shadow:0 18px 40px -22px rgba(16,24,40,.25);display:flex;flex-direction:column;box-sizing:border-box}
.fl-top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:6px;padding-right:40px;font-size:14px;color:#6b7280}
.fl-count{font-weight:600}
.fl-score{display:flex;gap:10px}
.fl-score b{font-weight:700}.fl-score .ok{color:#16a34a}.fl-score .bad{color:#dc2626}.fl-score .streak{color:#ea580c}
.fl-prompt{text-align:center;color:#4b5563;font-size:16px;margin:8px 0 4px}
.fl-q{display:flex;align-items:center;justify-content:center;text-align:center;min-height:150px;margin:6px 0 4px}
.fl-q--big{gap:14px;font-size:clamp(30px,4.6vw,52px);font-weight:700;color:#111827;line-height:1.15;word-break:break-word}
.fl-q--expr{font-size:clamp(46px,7vw,84px);font-weight:700;color:#111827;font-variant-numeric:tabular-nums;letter-spacing:1px}
.fl-q--letter{font-size:clamp(90px,14vw,160px);font-weight:700;color:#D7382E;line-height:1;letter-spacing:12px}
.fl-q--pic{flex-direction:column;gap:6px;font-size:clamp(26px,3.6vw,38px);font-weight:700;color:#111827}
.fl-q--pic .fl-emoji{font-size:clamp(70px,10vw,110px);line-height:1}
.fl-q--flag{min-height:190px}
.fl-flag{display:block;max-width:100%;height:auto;border-radius:6px;box-shadow:0 0 0 1px rgba(0,0,0,.1),0 6px 16px -8px rgba(0,0,0,.35);background:#f3f4f6}
.fl-flag--big{width:min(340px,80%);aspect-ratio:3/2;object-fit:cover}
.fl-flag--mini{width:56px;aspect-ratio:3/2;object-fit:cover;border-radius:4px}
.fl-flag--ans{width:150px;aspect-ratio:3/2;object-fit:cover;margin:4px auto}
.fl-q--clock{min-height:220px}
.fl-clock{width:min(240px,62vw);height:auto;filter:drop-shadow(0 8px 18px rgba(0,0,0,.15))}
.fl-q--elem{min-height:170px}
.fl-elem{width:150px;height:150px;border-radius:18px;background:linear-gradient(150deg,#e0f2fe,#bae6fd);border:2px solid #0ea5e9;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative}
.fl-elem small{position:absolute;top:10px;left:12px;font-size:16px;font-weight:700;color:#0369a1}
.fl-elem b{font-size:64px;font-weight:700;color:#0c4a6e;line-height:1}
.fl-q__sub{text-align:center;color:#6b7280;font-size:16px;margin-top:-4px}
.fl-say{align-self:center;margin:4px 0 2px;border:1px solid #e5e7eb;background:#fff;border-radius:999px;padding:6px 14px;font-size:14px;cursor:pointer;color:#374151}
.fl-say:hover{border-color:#D7382E;color:#D7382E}

.fl-timer{position:relative;height:8px;border-radius:999px;background:#f1f2f4;margin:10px 0 4px;overflow:hidden}
.fl-timer i{position:absolute;left:0;top:0;bottom:0;background:linear-gradient(90deg,#f59e0b,#D7382E);border-radius:inherit;transition:width .1s linear}
.fl-timer:after{content:attr(data-s);position:absolute;right:0;top:-22px;font-size:12px;color:#6b7280;font-weight:600}

.fl-ans{margin-top:10px}
.fl-opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.fl-opt{position:relative;display:flex;align-items:center;justify-content:center;gap:10px;min-height:62px;padding:10px 14px 10px 38px;border:2px solid #e5e7eb;border-radius:14px;background:#fff;font-size:18px;font-weight:600;color:#1f2328;cursor:pointer;text-align:center;transition:border-color .15s,background .15s,transform .08s;line-height:1.3}
.fl-opt:hover:not(:disabled){border-color:#93c5fd;background:#f8fbff}
.fl-opt:active:not(:disabled){transform:scale(.98)}
.fl-opt:disabled{cursor:default}
.fl-key{position:absolute;left:10px;top:50%;transform:translateY(-50%);width:22px;height:22px;border-radius:7px;background:#f1f2f4;color:#6b7280;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}
.fl-opt.is-right{border-color:#16a34a;background:#f0fdf4;color:#14532d}
.fl-opt.is-right .fl-key{background:#16a34a;color:#fff}
.fl-opt.is-wrong{border-color:#dc2626;background:#fef2f2;color:#7f1d1d}
.fl-opt.is-wrong .fl-key{background:#dc2626;color:#fff}
.fl-opt:disabled:not(.is-right):not(.is-wrong){opacity:.55}
.fl-opts--flags .fl-opt{min-height:110px;padding:10px 10px 10px 36px}
.fl-opts--flags .fl-flag{width:100%;max-width:170px;aspect-ratio:3/2;object-fit:cover}
.fl-opt .fl-emoji{font-size:30px}
.fl-opt-letter{font-size:34px;color:#D7382E}

.fl-form{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end}
.fl-field{flex:1 1 200px;display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;color:#6b7280}
.fl-field input{height:52px;border:2px solid #e5e7eb;border-radius:12px;padding:0 14px;font-size:20px;font-weight:600;color:#111827;background:#fff}
.fl-field input:focus{outline:none;border-color:#3369E8;box-shadow:0 0 0 4px rgba(51,105,232,.12)}
.fl-field input.is-ok{border-color:#16a34a;background:#f0fdf4}
.fl-field input.is-bad{border-color:#dc2626;background:#fef2f2}
.fl-form .fl-btn--primary{height:52px}
.fl-self-hint{text-align:center;color:#6b7280;font-size:15px;padding:10px;background:#f9fafb;border-radius:12px}

.fl-result{margin-top:14px;border-radius:16px;padding:14px 16px;text-align:center;animation:flIn .25s ease}
.fl-result.is-ok{background:#f0fdf4;border:1px solid #bbf7d0}
.fl-result.is-bad{background:#fef2f2;border:1px solid #fecaca}
.fl-result.is-show{background:#eff6ff;border:1px solid #bfdbfe}
.fl-result__head{font-weight:700;font-size:16px}
.fl-result.is-ok .fl-result__head{color:#15803d}.fl-result.is-bad .fl-result__head{color:#b91c1c}.fl-result.is-show .fl-result__head{color:#1d4ed8}
.fl-result__head small{font-weight:500;color:#6b7280;font-size:13px}
.fl-result__ans{font-size:clamp(24px,3.4vw,34px);font-weight:700;color:#111827;margin:4px 0 2px;line-height:1.2}
.fl-result__info{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 16px;font-size:14px;color:#4b5563}
.fl-self{display:flex;justify-content:center;gap:10px;margin-top:10px;flex-wrap:wrap}

.fl-actions{display:flex;justify-content:center;gap:10px;margin-top:auto;padding-top:16px;flex-wrap:wrap}
.fl-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 18px;border:1px solid #e5e7eb;border-radius:12px;background:#fff;color:#374151;font-size:15px;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.fl-btn:hover{border-color:#d1d5db;background:#f9fafb}
.fl-btn:disabled{opacity:.5;cursor:default}
.fl-btn--primary{background:#D7382E;border-color:#D7382E;color:#fff;min-width:150px}
.fl-btn--primary:hover{background:#bf2f26;border-color:#bf2f26;color:#fff}
.fl-btn--ok{background:#16a34a;border-color:#16a34a;color:#fff}.fl-btn--ok:hover{background:#15803d;color:#fff}
.fl-btn--bad{background:#fff;border-color:#fecaca;color:#b91c1c}.fl-btn--bad:hover{background:#fef2f2}
.fl-btn--cat{background:var(--cc);border-color:var(--cc);color:#fff;min-width:130px;height:52px;font-size:17px}
.fl-btn--cat:hover{filter:brightness(1.07);background:var(--cc);color:#fff}

/* thẻ bốc */
.fl-start{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#6b7280;font-size:16px}
.fl-start__ic{font-size:72px;line-height:1;margin-bottom:8px}
.fl-card{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;margin:8px 0;padding:28px 22px;border-radius:20px;background:linear-gradient(160deg,color-mix(in srgb,var(--cc) 12%,#fff),#fff 70%);border:2px solid color-mix(in srgb,var(--cc) 45%,#fff);text-align:center}
.fl-card.is-in{animation:flFlip .35s ease}
.fl-card__tag{display:inline-flex;padding:4px 14px;border-radius:999px;background:var(--cc);color:#fff;font-weight:700;font-size:14px;letter-spacing:.3px}
.fl-card__text{font-size:clamp(22px,3vw,32px);font-weight:700;color:#111827;line-height:1.35;max-width:640px}
.fl-card--pair{flex-direction:row;background:none;border:0;padding:6px 0;gap:12px;align-items:stretch}
.fl-pick{flex:1;min-height:200px;border:0;border-radius:20px;background:var(--pc);color:#fff;font-size:clamp(20px,2.6vw,28px);font-weight:700;padding:20px;cursor:pointer;line-height:1.3;transition:transform .15s,opacity .15s,box-shadow .15s}
.fl-pick:hover{transform:translateY(-2px)}
.fl-pick.is-picked{box-shadow:0 0 0 5px #fde047,0 14px 30px -12px rgba(0,0,0,.4);transform:scale(1.03)}
.fl-pick.is-dim{opacity:.45}
.fl-or{align-self:center;font-weight:700;color:#6b7280;font-size:16px}
@keyframes flFlip{from{transform:rotateY(70deg);opacity:0}to{transform:none;opacity:1}}
@keyframes flIn{from{transform:translateY(6px);opacity:0}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){.fl-card.is-in,.fl-result{animation:none}}

.fl-toast{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);background:#111827;color:#fff;padding:8px 14px;border-radius:10px;font-size:14px;z-index:5}
.fl-toast[hidden]{display:none}
.fl-empty{text-align:center;color:#6b7280;margin:auto}

/* khung cấu hình */
.fl-panel .fl-set{margin-bottom:14px}
.fl-panel .title_box{display:block;font-size:13px;font-weight:600;color:#6b7280;margin-bottom:6px}
.fl-panel .title_box small{font-weight:400}
.fl-panel select,.fl-panel textarea{width:100%;border:1px solid #e7e7ea;border-radius:10px;background:#f7f7f9;font-size:15px;color:#1f2328;box-sizing:border-box}
.fl-panel select{height:42px;padding:0 10px}
.fl-panel textarea{padding:8px 10px;resize:vertical;line-height:1.5}
.fl-seg{display:flex;gap:6px;flex-wrap:wrap}
.fl-seg label{flex:1 1 90px;cursor:pointer;margin:0}
.fl-seg input{position:absolute;opacity:0;width:1px;height:1px}
.fl-seg span{display:flex;align-items:center;justify-content:center;height:40px;padding:0 8px;border:1.5px solid #e5e7eb;border-radius:10px;font-size:14px;font-weight:600;color:#374151;background:#fff;text-align:center}
.fl-seg input:checked+span{border-color:#D7382E;background:#fff5f4;color:#b42318}
.fl-seg input:focus-visible+span{outline:2px solid #D7382E;outline-offset:2px}
.fl-note{font-size:12.5px;color:#6b7280;margin:6px 0 0;line-height:1.5}
.fl-checks{display:flex;flex-wrap:wrap;gap:6px}
.fl-checks label{cursor:pointer;margin:0}
.fl-checks input{position:absolute;opacity:0;width:1px;height:1px}
.fl-checks span{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:36px;padding:0 6px;border:1.5px solid #e5e7eb;border-radius:9px;font-weight:700;color:#6b7280;background:#fff}
.fl-checks input:checked+span{border-color:#3369E8;background:#eff6ff;color:#1d4ed8}
.fl-toggle{display:flex !important;align-items:center;gap:9px;font-size:14px !important;font-weight:500 !important;color:#374151 !important;cursor:pointer;margin:0 0 10px !important}
.fl-toggle input{position:absolute;opacity:0;width:1px;height:1px}
.fl-toggle span{position:relative;width:36px;height:20px;border-radius:999px;background:#cbd5e1;flex:none;transition:background .2s}
.fl-toggle span:after{content:"";position:absolute;top:3px;left:3px;width:14px;height:14px;border-radius:50%;background:#fff;transition:transform .2s}
.fl-toggle input:checked+span{background:#16a34a}
.fl-toggle input:checked+span:after{transform:translateX(16px)}
.fl-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:14px 0 10px;padding:12px 6px;border-radius:14px;background:#f9fafb;text-align:center}
.fl-stats b{display:block;font-size:20px;color:#111827;font-variant-numeric:tabular-nums}
.fl-stats span{font-size:11.5px;color:#6b7280}
.fl-panel-act{display:flex;gap:8px;flex-wrap:wrap}
.fl-panel-act .fl-btn{flex:1 1 140px;height:40px;font-size:14px}

/* toàn màn hình */
.wrapper-tool .left-tool.is-fs .fl-board{width:min(980px,94vw);max-width:none;min-height:min(86vh,760px);font-size:1.15em}
.wrapper-tool .left-tool.is-fs .fl-q--big{font-size:clamp(40px,6vw,72px)}
.wrapper-tool .left-tool.is-fs .fl-flag--big{width:min(480px,70vw)}

/* bảng tra cứu (SEO) */
.fl-ref{max-width:1200px;margin:36px auto 0}
.fl-ref h2{font-size:22px;margin:0 0 12px}
.fl-ref__wrap{max-height:480px;overflow:auto;border:1px solid #eceef1;border-radius:14px}
.fl-table{width:100%;border-collapse:collapse;font-size:15px}
.fl-table th{position:sticky;top:0;background:#1f2328;color:#fff;font-weight:600;padding:9px 10px;text-align:left;z-index:1}
.fl-table td{padding:7px 10px;border-top:1px solid #f0f1f3;vertical-align:middle}
.fl-table tbody tr:nth-child(even) td{background:#fafafa}
.fl-table img{display:block;border-radius:3px;box-shadow:0 0 0 1px rgba(0,0,0,.1);object-fit:cover}
.fl-mult{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.fl-mult__col{display:flex;flex-direction:column;gap:2px;padding:12px;border:1px solid #eceef1;border-radius:14px;background:#fff;font-variant-numeric:tabular-nums}
.fl-mult__col b{color:#D7382E;margin-bottom:4px}

@media (max-width:767px){
  .fl-board{min-height:auto;padding:16px 14px;border-radius:18px}
  .fl-q{min-height:110px}
  .fl-opt{min-height:54px;font-size:16px}
  .fl-card--pair{flex-direction:column}
  .fl-pick{min-height:110px}
  .fl-or{margin:-4px 0}
}