/* Flashcard Studio V2.5.23 */
.flashcard-studio-dialog{width:min(1080px,calc(100vw - 28px));max-width:1080px;height:min(900px,calc(100dvh - 28px));max-height:calc(100dvh - 28px);margin:14px auto;border-radius:24px;display:flex!important;flex-direction:column;overflow:hidden!important;background:#f5f8fc}
.flashcard-studio-dialog>.modal-header{flex:0 0 auto;padding:14px 20px}
.flashcard-studio-dialog>.modal-body{flex:1 1 auto;min-height:0;overflow-y:auto!important;overflow-x:hidden!important;-webkit-overflow-scrolling:touch;touch-action:pan-y;overscroll-behavior-y:contain;padding:0;background:#f5f8fc}
.flashcard-studio-root{min-height:100%;color:#21324a}
.fcs-shell{max-width:1000px;margin:0 auto;padding:18px}
.fcs-loading,.fcs-empty{min-height:520px;display:grid;place-items:center;align-content:center;text-align:center;gap:10px;padding:28px}
.fcs-loading>span,.fcs-empty>span{font-size:56px}.fcs-loading strong,.fcs-empty h3{font-size:22px;margin:0}.fcs-loading small,.fcs-empty p{color:#74859b;max-width:520px;margin:0}
.fcs-toolbar{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;margin-bottom:12px}
.fcs-progress-copy{min-width:0}.fcs-progress-copy>div{display:flex;justify-content:space-between;gap:12px;align-items:center}.fcs-progress-copy strong{font-size:15px}.fcs-progress-copy span{font-size:11px;color:#76879b}.fcs-progress-track{height:7px;border-radius:999px;background:#e1e8f1;overflow:hidden;margin-top:8px}.fcs-progress-track i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#1769e0,#54a7ff);transition:width .25s ease}
.fcs-toolbar-actions{display:flex;gap:8px;align-items:center}.fcs-icon-btn,.fcs-select{border:1px solid #dbe4ef;background:#fff;color:#42566f;border-radius:11px;min-height:40px;padding:0 12px;font:inherit;font-weight:800}.fcs-icon-btn{cursor:pointer}.fcs-icon-btn:hover{border-color:#9fc0ed;background:#f7fbff}.fcs-select{outline:none}
.fcs-modebar{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:2px 0 12px}.fcs-modebar::-webkit-scrollbar{display:none}.fcs-modebar button{white-space:nowrap;border:1px solid #dbe4ef;background:#fff;color:#52667f;border-radius:999px;padding:9px 13px;font-weight:800;cursor:pointer}.fcs-modebar button.active{border-color:#1769e0;background:#eaf3ff;color:#155fbe}
.fcs-study-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:14px;align-items:start}
.fcs-card-wrap{perspective:1500px;min-width:0}.fcs-card{width:100%;min-height:430px;border:0;background:transparent;padding:0;display:block;position:relative;cursor:pointer;touch-action:pan-y;user-select:none}.fcs-card-inner{position:relative;width:100%;min-height:430px;transition:transform .52s cubic-bezier(.2,.75,.2,1);transform-style:preserve-3d}.fcs-card.flipped .fcs-card-inner{transform:rotateY(180deg)}
.fcs-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:1px solid #dfe7f0;border-radius:24px;background:#fff;box-shadow:0 18px 55px rgba(43,73,113,.10);padding:28px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;overflow:hidden}.fcs-face:before{content:"";position:absolute;inset:0 0 auto;height:5px;background:linear-gradient(90deg,#1769e0,#67b5ff)}.fcs-back{transform:rotateY(180deg);justify-content:flex-start;overflow:auto}
.fcs-card-meta{position:absolute;top:20px;left:22px;right:22px;display:flex;justify-content:space-between;align-items:center;gap:10px}.fcs-chip{display:inline-flex;align-items:center;gap:5px;border-radius:999px;background:#edf5ff;color:#1769e0;padding:6px 9px;font-size:10px;font-weight:900}.fcs-status{font-size:10px;color:#7a8a9e}
.fcs-front-main{max-width:800px}.fcs-front-main .hanzi{display:block;font:700 clamp(70px,12vw,126px)/1.05 "Noto Serif SC","Songti SC",serif;color:#162d49;letter-spacing:.02em}.fcs-front-main .meaning-prompt{display:block;font-size:clamp(27px,4vw,44px);line-height:1.35;color:#18314f;font-weight:850}.fcs-front-main p{margin:18px 0 0;color:#7b8b9e;font-size:13px}.fcs-flip-hint{position:absolute;bottom:22px;display:inline-flex;align-items:center;gap:7px;color:#6c7d92;font-size:11px;background:#f6f8fb;border:1px solid #e5eaf1;border-radius:999px;padding:8px 12px}
.fcs-back-content{width:100%;max-width:760px;margin:auto 0}.fcs-back-hanzi{font:700 60px/1.1 "Noto Serif SC","Songti SC",serif;color:#17314f}.fcs-back-pinyin{font-size:21px;color:#1769e0;font-weight:850;margin-top:7px}.fcs-back-meaning{font-size:25px;line-height:1.35;margin:10px auto 0;color:#223950;max-width:700px}.fcs-type-line{display:flex;justify-content:center;gap:7px;flex-wrap:wrap;margin-top:12px}.fcs-type-line span{font-size:10px;border-radius:999px;background:#f1f4f8;color:#697b91;padding:5px 8px}
.fcs-example{width:100%;text-align:left;margin-top:22px;border:1px solid #e1e8f0;border-radius:16px;background:#f8fafd;padding:15px 16px}.fcs-example>span{display:block;font-size:10px;font-weight:900;letter-spacing:.08em;color:#8291a4;margin-bottom:7px}.fcs-example strong{display:block;font-size:19px;line-height:1.5;color:#263d57}.fcs-example em{display:block;font-style:normal;color:#1769e0;font-size:13px;line-height:1.55;margin-top:5px}.fcs-example p{margin:5px 0 0;color:#566a82;font-size:13px;line-height:1.6}
.fcs-side{display:grid;gap:10px}.fcs-side-card{border:1px solid #dfe7f0;border-radius:17px;background:#fff;padding:14px;box-shadow:0 8px 26px rgba(44,73,111,.05)}.fcs-side-card>span{font-size:10px;font-weight:900;letter-spacing:.08em;color:#7f8fa3}.fcs-side-card h3{font-size:16px;margin:5px 0 0}.fcs-mini-stats{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:11px}.fcs-mini-stats div{padding:9px;border-radius:11px;background:#f5f8fc;text-align:center}.fcs-mini-stats strong,.fcs-mini-stats small{display:block}.fcs-mini-stats strong{font-size:18px}.fcs-mini-stats small{font-size:9px;color:#7b8b9e;margin-top:2px}
.fcs-actions{display:grid;gap:8px}.fcs-actions button{border:1px solid #dce5ef;border-radius:12px;background:#fff;color:#40546d;padding:11px 12px;font-weight:850;cursor:pointer;text-align:left}.fcs-actions button:hover{border-color:#9fc2f1;background:#f7fbff}.fcs-actions button.primary{border-color:#1769e0;background:#1769e0;color:#fff;text-align:center}
.fcs-ratings{margin-top:14px;border:1px solid #dfe7f0;border-radius:17px;background:#fff;padding:13px}.fcs-ratings-head{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:9px}.fcs-ratings-head strong{font-size:13px}.fcs-ratings-head small{font-size:10px;color:#8190a3}.fcs-rating-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.fcs-rating-grid button{border:1px solid #dfe6ee;border-radius:12px;background:#fff;padding:10px 7px;cursor:pointer;color:#445970}.fcs-rating-grid button span,.fcs-rating-grid button strong{display:block}.fcs-rating-grid button span{font-size:20px}.fcs-rating-grid button strong{font-size:11px;margin-top:3px}.fcs-rating-grid button:hover{transform:translateY(-1px);border-color:#9ec0ec;background:#f8fbff}.fcs-rating-grid button:disabled{opacity:.55;cursor:wait}
.fcs-nav{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.fcs-nav button{border:1px solid #dce5ef;border-radius:12px;background:#fff;color:#476079;padding:11px;font-weight:850;cursor:pointer}.fcs-nav button:hover{background:#f7fbff;border-color:#a7c5eb}
.fcs-key-hint{text-align:center;color:#8795a7;font-size:10px;margin-top:11px}.fcs-key-hint kbd{display:inline-grid;place-items:center;min-width:20px;height:20px;border:1px solid #d7dfe9;border-bottom-width:2px;border-radius:5px;background:#fff;color:#5d7087;margin:0 2px}
.fcs-toast-note{margin-top:10px;text-align:center;font-size:11px;color:#6d7e92}
.fcs-complete{min-height:500px;display:grid;place-items:center;align-content:center;text-align:center;gap:10px;padding:30px}.fcs-complete>span{font-size:70px}.fcs-complete h2{font-size:28px;margin:0}.fcs-complete p{color:#6e7f94;margin:0;max-width:540px}.fcs-complete div{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:10px}.fcs-complete button{border:1px solid #d9e3ef;border-radius:12px;background:#fff;padding:11px 15px;font-weight:850;cursor:pointer}.fcs-complete button.primary{background:#1769e0;border-color:#1769e0;color:#fff}
@media(max-width:820px){.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}.fcs-shell{padding:12px 12px max(84px,env(safe-area-inset-bottom))}.fcs-study-layout{grid-template-columns:1fr}.fcs-side{grid-template-columns:1fr 1fr}.fcs-card,.fcs-card-inner{min-height:420px}.fcs-face{border-radius:20px}.fcs-ratings{position:sticky;bottom:8px;z-index:4;box-shadow:0 10px 35px rgba(35,60,93,.14)}}
@media(max-width:560px){.fcs-shell{padding:9px 9px max(88px,env(safe-area-inset-bottom))}.fcs-toolbar{grid-template-columns:1fr}.fcs-toolbar-actions{display:grid;grid-template-columns:1fr auto}.fcs-select{width:100%}.fcs-card,.fcs-card-inner{min-height:390px}.fcs-face{padding:20px 15px}.fcs-card-meta{top:15px;left:15px;right:15px}.fcs-front-main .hanzi{font-size:82px}.fcs-front-main .meaning-prompt{font-size:29px}.fcs-back-hanzi{font-size:52px}.fcs-back-pinyin{font-size:18px}.fcs-back-meaning{font-size:21px}.fcs-example{padding:12px}.fcs-example strong{font-size:17px}.fcs-side{grid-template-columns:1fr}.fcs-rating-grid{grid-template-columns:repeat(2,1fr)}.fcs-key-hint{display:none}}
@media(prefers-reduced-motion:reduce){.fcs-card-inner,.fcs-progress-track i{transition:none!important}}