/* V2.5.25 — Flashcard Focus Studio */
.flashcard-studio-dialog{width:min(1120px,calc(100vw - 28px));max-width:1120px;height:min(920px,calc(100dvh - 28px));max-height:calc(100dvh - 28px);margin:14px auto;border-radius:24px;display:flex!important;flex-direction:column;overflow:hidden!important;background:#f4f7fb}
.flashcard-studio-dialog>.modal-header{flex:0 0 auto;padding:14px 20px;border-bottom:1px solid #e2e8f1;background:#fff}
.flashcard-studio-dialog>.modal-body{flex:1 1 0%!important;min-height:0!important;height:auto!important;overflow-y:auto!important;overflow-x:hidden!important;-webkit-overflow-scrolling:touch;touch-action:pan-y;overscroll-behavior-y:contain;padding:0!important;background:#f4f7fb}
.flashcard-studio-root{min-height:100%;color:#17263d}
.fcs25-shell{max-width:1040px;margin:0 auto;padding:22px}
.fcs25-loading,.fcs25-empty{min-height:560px;display:grid;place-items:center;align-content:center;text-align:center;gap:10px;padding:30px}.fcs25-loading>span,.fcs25-empty>span{font-size:58px}.fcs25-loading strong,.fcs25-empty h3{font-size:23px;margin:0}.fcs25-loading small,.fcs25-empty p{max-width:560px;margin:0;color:#74849a;line-height:1.65}

/* Setup */
.fcs25-hero{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:18px;align-items:center;padding:26px 28px;border-radius:24px;background:linear-gradient(135deg,#113f7e,#196fd6 62%,#3e96ef);color:#fff;box-shadow:0 18px 45px rgba(32,91,166,.18)}
.fcs25-eyebrow{display:inline-block;font-size:11px;font-weight:900;letter-spacing:.12em;opacity:.78}.fcs25-hero h2{max-width:680px;margin:8px 0 8px;font-size:clamp(26px,3.2vw,40px);line-height:1.13;letter-spacing:-.03em}.fcs25-hero p{max-width:650px;margin:0;color:rgba(255,255,255,.82);font-size:14px;line-height:1.65}
.fcs25-hero-score{min-height:150px;border:1px solid rgba(255,255,255,.24);border-radius:20px;background:rgba(255,255,255,.12);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:16px}.fcs25-hero-score strong{font-size:46px;line-height:1}.fcs25-hero-score span{font-weight:850;margin-top:7px}.fcs25-hero-score small{margin-top:8px;color:rgba(255,255,255,.76);font-size:11px}
.fcs25-setup-card{margin-top:14px;border:1px solid #dfe6ef;border-radius:20px;background:#fff;padding:18px;box-shadow:0 8px 30px rgba(42,67,101,.045)}
.fcs25-section-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}.fcs25-section-head>div{display:flex;gap:10px;align-items:center}.fcs25-section-head>div>span{display:grid;place-items:center;width:28px;height:28px;border-radius:9px;background:#eaf3ff;color:#1769d2;font-size:12px;font-weight:900}.fcs25-section-head strong,.fcs25-section-head small{display:block}.fcs25-section-head strong{font-size:16px}.fcs25-section-head small{font-size:11px;color:#7b899b;margin-top:2px}.fcs25-section-head em{font-style:normal;font-size:11px;color:#6d7d91}
.fcs25-source-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:9px}.fcs25-source{position:relative;display:grid;grid-template-columns:auto 1fr;gap:8px;align-items:center;min-height:76px;border:1px solid #dfe6ef;border-radius:15px;background:#fff;padding:12px;text-align:left;color:#33475f;cursor:pointer;transition:.18s ease}.fcs25-source:hover{border-color:#aac7ec;transform:translateY(-1px)}.fcs25-source.active{border-color:#2674df;background:#eef6ff;box-shadow:0 0 0 2px rgba(38,116,223,.08)}.fcs25-source>span{font-size:21px}.fcs25-source strong,.fcs25-source small{display:block}.fcs25-source strong{font-size:13px}.fcs25-source small{font-size:10px;line-height:1.4;color:#7d8da1;margin-top:3px}.fcs25-source>b{position:absolute;top:8px;right:9px;font-size:10px;color:#1769d2;background:#e8f2ff;border-radius:999px;padding:3px 6px}
.fcs25-setup-two{display:grid;grid-template-columns:1fr 1fr;gap:14px}.fcs25-field-label{font-size:11px;font-weight:850;color:#677990;margin:12px 0 7px}.fcs25-pills{display:flex;gap:7px;flex-wrap:wrap}.fcs25-pills button{border:1px solid #dce5ef;border-radius:999px;background:#fff;color:#53677f;padding:8px 11px;font-weight:800;font-size:11px;cursor:pointer}.fcs25-pills button.active{border-color:#1769d2;background:#1769d2;color:#fff}
.fcs25-mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.fcs25-mode{display:grid;grid-template-columns:36px 1fr;gap:9px;align-items:center;border:1px solid #dfe6ef;border-radius:14px;background:#fff;padding:11px;text-align:left;color:#3d526b;cursor:pointer}.fcs25-mode>span{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:#f2f6fb;color:#1769d2;font-weight:900}.fcs25-mode strong,.fcs25-mode small{display:block}.fcs25-mode strong{font-size:12px}.fcs25-mode small{font-size:10px;color:#7b8b9e;margin-top:2px}.fcs25-mode.active{border-color:#2774db;background:#f1f7ff}.fcs25-mode.active>span{background:#1769d2;color:#fff}
.fcs25-switch{display:flex;align-items:center;gap:9px;margin-top:12px;font-size:11px;color:#52677f;cursor:pointer}.fcs25-switch input{position:absolute;opacity:0;pointer-events:none}.fcs25-switch>span{position:relative;width:38px;height:22px;border-radius:999px;background:#d7e0eb;transition:.2s}.fcs25-switch>span:after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.18);transition:.2s}.fcs25-switch input:checked+span{background:#1769d2}.fcs25-switch input:checked+span:after{transform:translateX(16px)}
.fcs25-startbar{position:sticky;bottom:0;z-index:5;display:flex;justify-content:space-between;gap:18px;align-items:center;margin-top:14px;padding:14px 16px;border:1px solid #dbe4ee;border-radius:17px;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);box-shadow:0 12px 35px rgba(32,57,91,.12)}.fcs25-startbar strong,.fcs25-startbar span{display:block}.fcs25-startbar strong{font-size:14px}.fcs25-startbar span{font-size:10px;color:#75869a;margin-top:3px}.fcs25-startbar button{min-width:210px;border:0;border-radius:13px;background:#1769d2;color:#fff;padding:13px 18px;font-weight:900;cursor:pointer}.fcs25-startbar button:disabled{background:#aeb9c8;cursor:not-allowed}

/* Study */
.fcs25-study{max-width:920px}.fcs25-study-head{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center}.fcs25-study-head>button{border:1px solid #dce5ef;border-radius:11px;background:#fff;color:#53667c;padding:9px 11px;font-weight:800;cursor:pointer}.fcs25-study-progress>div{display:flex;justify-content:space-between;gap:12px;align-items:center}.fcs25-study-progress strong{font-size:13px}.fcs25-study-progress span{font-size:10px;color:#77889c}.fcs25-study-progress>i{display:block;height:7px;border-radius:999px;background:#dfe7f0;overflow:hidden;margin-top:7px}.fcs25-study-progress>i>b{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#1769d2,#54a4ee);transition:width .2s ease}.fcs25-live-score{display:flex;gap:6px}.fcs25-live-score span{border:1px solid #dce5ef;border-radius:999px;background:#fff;padding:6px 9px;font-size:10px;font-weight:850;color:#587089}
.fcs25-stage{max-width:800px;margin:18px auto 0}.fcs25-card{position:relative;min-height:430px;border:1px solid #dfe6ef;border-radius:26px;background:#fff;box-shadow:0 22px 60px rgba(44,68,101,.11);overflow:hidden;display:flex;align-items:center;justify-content:center;text-align:center;cursor:pointer}.fcs25-card:before{content:"";position:absolute;inset:0 0 auto;height:5px;background:linear-gradient(90deg,#1769d2,#58a8f1)}.fcs25-card.is-revealed{cursor:default;align-items:stretch}.fcs25-card-meta{position:absolute;top:20px;left:22px;right:22px;display:flex;justify-content:space-between;gap:10px;z-index:2}.fcs25-card-meta span,.fcs25-card-meta b{font-size:10px;border-radius:999px;padding:6px 9px}.fcs25-card-meta span{background:#eaf3ff;color:#1769d2;font-weight:900}.fcs25-card-meta b{background:#f2f5f9;color:#728398;font-weight:800}
.fcs25-question{max-width:680px;padding:74px 34px 52px;display:flex;flex-direction:column;align-items:center}.fcs25-prompt-label{font-size:10px;font-weight:900;letter-spacing:.11em;color:#7f8fa2;margin-bottom:18px}.fcs25-front-hanzi{font:700 clamp(82px,12vw,128px)/1.05 "Noto Serif SC","Songti SC",serif;color:#142d49}.fcs25-front-meaning{font-size:clamp(30px,5vw,48px);line-height:1.3;letter-spacing:-.02em;color:#18314d}.fcs25-front-pinyin{font-size:clamp(38px,6vw,62px);line-height:1.2;color:#1769d2}.fcs25-question>small{margin-top:20px;color:#7b8b9e;font-size:12px;line-height:1.55}.fcs25-listen-orb{width:104px;height:104px;border:0;border-radius:50%;background:#1769d2;color:#fff;font-size:38px;cursor:pointer;box-shadow:0 16px 38px rgba(23,105,210,.25)}.fcs25-listen-title{font-size:20px;margin-top:18px;color:#273d57}
.fcs25-answer{width:100%;padding:68px 30px 28px;overflow:auto}.fcs25-answer-top>div{display:flex;justify-content:center;align-items:center;gap:12px}.fcs25-answer-top>div>strong{font:700 62px/1.1 "Noto Serif SC","Songti SC",serif;color:#162f4c}.fcs25-answer-top button{border:1px solid #dbe5ef;border-radius:50%;width:38px;height:38px;background:#fff;cursor:pointer}.fcs25-answer-top>em{display:block;font-style:normal;color:#1769d2;font-size:21px;font-weight:850;margin-top:7px}.fcs25-answer-top>p{font-size:24px;line-height:1.4;margin:8px auto 0;color:#253c55}.fcs25-answer-top>span{display:inline-block;margin-top:10px;border-radius:999px;background:#f1f5f9;color:#75869a;padding:5px 9px;font-size:10px}
.fcs25-example,.fcs25-note{max-width:690px;margin:18px auto 0;border:1px solid #e1e7ef;border-radius:16px;background:#f8fafc;text-align:left;padding:14px 16px}.fcs25-example>div{display:flex;justify-content:space-between;gap:10px;align-items:center}.fcs25-example>div>span,.fcs25-note>span{font-size:10px;font-weight:900;letter-spacing:.08em;color:#7c8c9f}.fcs25-example button{border:0;background:transparent;color:#1769d2;font-size:10px;font-weight:850;cursor:pointer}.fcs25-example>strong{display:block;font-size:18px;line-height:1.55;margin-top:7px;color:#273e58}.fcs25-example>em{display:block;font-style:normal;color:#1769d2;font-size:13px;line-height:1.55;margin-top:4px}.fcs25-example>p,.fcs25-note>p{margin:5px 0 0;color:#5a6e84;font-size:12px;line-height:1.6}
.fcs25-reveal-row{text-align:center;margin-top:14px}.fcs25-reveal-row button{border:0;border-radius:13px;background:#1769d2;color:#fff;padding:13px 24px;font-weight:900;cursor:pointer}.fcs25-reveal-row button span{display:inline-block;margin-left:8px;border-radius:6px;background:rgba(255,255,255,.18);padding:2px 6px;font-size:10px}.fcs25-reveal-row small{display:block;margin-top:8px;color:#8190a2;font-size:10px}
.fcs25-rate-zone{margin-top:14px;border:1px solid #dfe6ef;border-radius:19px;background:#fff;padding:14px}.fcs25-rate-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}.fcs25-rate-head strong{font-size:13px}.fcs25-rate-head small{font-size:10px;color:#7d8c9f}.fcs25-rating-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.fcs25-rating-grid button{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center;border:1px solid #dfe6ee;border-radius:13px;background:#fff;padding:10px;text-align:left;color:#41566f;cursor:pointer;transition:.16s}.fcs25-rating-grid button:hover{border-color:#8fb7ea;background:#f6faff;transform:translateY(-1px)}.fcs25-rating-grid button:disabled{opacity:.55;cursor:wait;transform:none}.fcs25-rating-grid button>span{font-size:20px}.fcs25-rating-grid strong,.fcs25-rating-grid small{display:block}.fcs25-rating-grid strong{font-size:11px}.fcs25-rating-grid small{font-size:9px;color:#8291a4;margin-top:2px}.fcs25-rating-grid button>b{font-size:9px;color:#1769d2;background:#edf5ff;border-radius:999px;padding:4px 6px;white-space:nowrap}.fcs25-rate-tools{display:flex;justify-content:flex-end;gap:8px;margin-top:9px}.fcs25-rate-tools button{border:0;background:transparent;color:#6e8197;font-size:10px;font-weight:800;cursor:pointer}
.fcs25-study-foot{display:flex;justify-content:center;gap:14px;align-items:center;flex-wrap:wrap;margin-top:13px;color:#8593a5;font-size:10px}.fcs25-study-foot kbd{display:inline-grid;place-items:center;min-width:20px;height:20px;border:1px solid #d6dee8;border-bottom-width:2px;border-radius:5px;background:#fff;color:#5a6f87;margin:0 2px}.fcs25-study-foot button{border:0;background:transparent;color:#62778e;font-size:10px;font-weight:850;cursor:pointer}

/* Summary */
.fcs25-summary{max-width:850px}.fcs25-summary-hero{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:center;padding:26px;border-radius:23px;background:linear-gradient(135deg,#123d77,#1b74dc);color:#fff}.fcs25-summary-hero>span{font-size:64px}.fcs25-summary-hero small{font-size:10px;font-weight:900;letter-spacing:.12em;opacity:.75}.fcs25-summary-hero h2{font-size:36px;margin:5px 0 5px}.fcs25-summary-hero p{max-width:590px;margin:0;color:rgba(255,255,255,.8);font-size:13px;line-height:1.6}.fcs25-summary-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:12px}.fcs25-summary-stats div{border:1px solid #dfe6ef;border-radius:15px;background:#fff;padding:15px;text-align:center}.fcs25-summary-stats strong,.fcs25-summary-stats span{display:block}.fcs25-summary-stats strong{font-size:22px}.fcs25-summary-stats span{font-size:10px;color:#7d8da0;margin-top:3px}
.fcs25-hard-list,.fcs25-perfect{margin-top:12px;border:1px solid #dfe6ef;border-radius:18px;background:#fff;padding:16px}.fcs25-hard-list>div:first-child strong,.fcs25-hard-list>div:first-child span{display:block}.fcs25-hard-list>div:first-child strong{font-size:14px}.fcs25-hard-list>div:first-child span{font-size:10px;color:#7a8a9e;margin-top:2px}.fcs25-hard-chips{display:grid;grid-template-columns:repeat(2,1fr);gap:7px;margin-top:12px}.fcs25-hard-chips>span{border-radius:12px;background:#f5f8fb;padding:9px 11px}.fcs25-hard-chips b,.fcs25-hard-chips small{display:block}.fcs25-hard-chips b{font-size:17px}.fcs25-hard-chips small{font-size:10px;color:#708298;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}.fcs25-perfect{display:flex;gap:12px;align-items:center}.fcs25-perfect>span{font-size:32px}.fcs25-perfect strong,.fcs25-perfect small{display:block}.fcs25-perfect strong{font-size:14px}.fcs25-perfect small{font-size:10px;color:#77899d;margin-top:3px}.fcs25-skipped{text-align:center;color:#7d8c9f;font-size:10px}.fcs25-summary-actions{display:flex;justify-content:flex-end;gap:8px;flex-wrap:wrap;margin-top:14px}.fcs25-summary-actions button{border:1px solid #dbe4ee;border-radius:12px;background:#fff;color:#536980;padding:11px 14px;font-weight:850;cursor:pointer}.fcs25-summary-actions button.primary{border-color:#1769d2;background:#1769d2;color:#fff}

@media(max-width:900px){.fcs25-source-grid{grid-template-columns:repeat(3,1fr)}.fcs25-setup-two{grid-template-columns:1fr}.fcs25-rating-grid{grid-template-columns:1fr 1fr}.fcs25-summary-stats{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.flashcard-studio-dialog{width:100vw;max-width:none;height:100dvh;max-height:100dvh;margin:0;border-radius:0}.flashcard-studio-dialog>.modal-body{height:0}.fcs25-shell{padding:12px 10px max(78px,env(safe-area-inset-bottom))}.fcs25-hero{grid-template-columns:1fr;padding:20px}.fcs25-hero-score{min-height:auto;display:grid;grid-template-columns:auto 1fr;column-gap:10px;text-align:left;align-items:center}.fcs25-hero-score strong{grid-row:1/3;font-size:42px}.fcs25-hero-score small{margin:0}.fcs25-source-grid{grid-template-columns:1fr 1fr}.fcs25-startbar{border-radius:14px}.fcs25-startbar button{min-width:0}.fcs25-study-head{grid-template-columns:auto 1fr}.fcs25-live-score{display:none}.fcs25-card{min-height:400px;border-radius:21px}.fcs25-question{padding:68px 20px 46px}.fcs25-answer{padding:64px 18px 22px}.fcs25-rate-head{display:block}.fcs25-rate-head small{display:block;margin-top:3px}.fcs25-summary-hero{grid-template-columns:1fr;text-align:center}.fcs25-summary-hero>span{font-size:48px}.fcs25-hard-chips{grid-template-columns:1fr}}
@media(max-width:480px){.fcs25-source-grid{grid-template-columns:1fr}.fcs25-mode-grid{grid-template-columns:1fr 1fr}.fcs25-startbar{align-items:stretch;flex-direction:column}.fcs25-startbar button{width:100%}.fcs25-rating-grid{grid-template-columns:1fr 1fr}.fcs25-rating-grid button{grid-template-columns:auto 1fr}.fcs25-rating-grid button>b{grid-column:1/3;justify-self:start}.fcs25-study-foot span{display:none}.fcs25-summary-stats{grid-template-columns:1fr 1fr}.fcs25-summary-actions{display:grid}.fcs25-summary-actions button{width:100%}}
@media(prefers-reduced-motion:reduce){.fcs25-source,.fcs25-rating-grid button,.fcs25-study-progress>i>b{transition:none!important}}