.card{position:relative;width:100%;height:100%;cursor:pointer;transform-style:preserve-3d;transition:transform .8s cubic-bezier(.34,1.56,.64,1)}.card.is-flipped{transform:rotateY(180deg)}.card:hover .card-face{border-color:rgba(var(--color-theme),.5);box-shadow:0 0 30px rgba(var(--color-theme),.2)}.card-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:40px;border-radius:32px;background:rgba(var(--color-base),.8);border:2px solid rgba(var(--color-main),.1);box-shadow:0 8px 32px #0000001a;transition:all .3s ease;text-align:center;overflow:hidden}@media (width < 640px){.card-face{padding:30px 20px;border-radius:24px}}.card-face:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(var(--color-theme),.05),transparent);pointer-events:none}.card-front{z-index:2}.card-front .card-title{font-size:.9rem;color:rgba(var(--color-main),.6);margin-bottom:12px;font-weight:500}.card-front h2{font-size:2.22rem;margin:0;line-height:1.3;color:rgb(var(--color-theme))}@media (width < 640px){.card-front h2{font-size:1.4rem}}.card-front .hint{margin-top:24px;font-size:.9rem;color:rgba(var(--color-main),.4);letter-spacing:.2em;font-weight:700}.card-back{transform:rotateY(180deg);padding:30px}.card-back p{font-size:1.1rem;line-height:1.6;margin:0;color:rgba(var(--color-main),.9)}@media (width < 640px){.card-back p{font-size:1rem}}.card-back .content-scroll{width:100%;overflow-y:auto;display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;padding:10px 0;-ms-overflow-style:none;scrollbar-width:none}.card-back .content-scroll::-webkit-scrollbar{display:none}.card-back .link{margin-top:24px;display:inline-flex;align-items:center;color:rgb(var(--color-theme));text-decoration:none;font-weight:700;font-size:.95rem;transition:all .2s;border-bottom:2px solid transparent}.card-back .link:hover{border-bottom-color:rgb(var(--color-theme))}.card-back .link:after{content:"→";margin-left:8px;transition:transform .2s}.card-back .link:hover:after{transform:translate(4px)}.card-animation{animation:cardSlideIn .5s cubic-bezier(.23,1,.32,1)}@keyframes cardSlideIn{0%{opacity:0;transform:translateY(30px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.flashcard-page[data-astro-cid-owie4l4w]{min-height:80vh;display:flex;flex-direction:column;justify-content:center;padding:60px 0}.l-content[data-astro-cid-owie4l4w]{max-width:900px;margin:0 auto;width:100%;padding:0 20px}.header[data-astro-cid-owie4l4w]{text-align:center;margin-bottom:48px}.header[data-astro-cid-owie4l4w] h1[data-astro-cid-owie4l4w]{font-size:2.5rem;margin-bottom:12px;color:rgb(var(--color-theme));font-weight:800}@media (width < 640px){.header[data-astro-cid-owie4l4w] h1[data-astro-cid-owie4l4w]{font-size:1.8rem}}.header[data-astro-cid-owie4l4w] .subtitle[data-astro-cid-owie4l4w]{color:rgba(var(--color-main),.7);font-size:1.1rem;margin:0}.deck-container[data-astro-cid-owie4l4w]{background:rgba(var(--color-base),.4);backdrop-filter:blur(20px);border:1px solid rgba(var(--color-main),.1);border-radius:40px;padding:60px;box-shadow:0 32px 64px #0003}@media (width < 640px){.deck-container[data-astro-cid-owie4l4w]{padding:30px;border-radius:24px}}#flash-card-stage[data-astro-cid-owie4l4w]{perspective:2000px;width:100%;height:400px;margin-bottom:40px}@media (width < 640px){#flash-card-stage[data-astro-cid-owie4l4w]{height:420px}}.controls[data-astro-cid-owie4l4w]{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:32px}.btn-icon[data-astro-cid-owie4l4w]{width:56px;height:56px;border-radius:50%;border:1px solid rgba(var(--color-main),.1);background:rgba(var(--color-base),.8);color:rgb(var(--color-main));display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.btn-icon[data-astro-cid-owie4l4w]:hover{background:rgb(var(--color-theme));color:#fff;transform:scale(1.1);border-color:rgb(var(--color-theme))}.btn-icon[data-astro-cid-owie4l4w]:active{transform:scale(.95)}.btn-icon[data-astro-cid-owie4l4w] svg[data-astro-cid-owie4l4w]{fill:currentColor}.main-controls[data-astro-cid-owie4l4w]{flex:1;display:flex;justify-content:center}.btn-text[data-astro-cid-owie4l4w]{padding:14px 28px;border-radius:100px;border:none;background:linear-gradient(135deg,rgb(var(--color-theme)),rgb(var(--color-caution)));color:#fff;font-weight:700;font-size:1rem;cursor:pointer;display:flex;align-items:center;transition:all .3s;box-shadow:0 8px 20px rgba(var(--color-theme),.3)}.btn-text[data-astro-cid-owie4l4w]:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(var(--color-theme),.4)}.btn-text[data-astro-cid-owie4l4w]:active{transform:translateY(0)}.btn-text[data-astro-cid-owie4l4w] svg[data-astro-cid-owie4l4w]{fill:currentColor}.progress-container[data-astro-cid-owie4l4w] .progress-bar-bg[data-astro-cid-owie4l4w]{height:6px;background:rgba(var(--color-main),.1);border-radius:3px;margin-bottom:12px;overflow:hidden}.progress-container[data-astro-cid-owie4l4w] .progress-bar-fill[data-astro-cid-owie4l4w]{height:100%;background:rgb(var(--color-theme));transition:width .4s cubic-bezier(.16,1,.3,1)}.progress-container[data-astro-cid-owie4l4w] .status-text[data-astro-cid-owie4l4w]{text-align:right;font-size:.9rem;color:rgba(var(--color-main),.5);font-family:monospace;font-weight:600}.keyboard-hint[data-astro-cid-owie4l4w]{margin-top:40px;text-align:center;color:rgba(var(--color-main),.4);font-size:.85rem;transition:all .6s ease-out .4s}.keyboard-hint[data-astro-cid-owie4l4w] span[data-astro-cid-owie4l4w]{padding:6px 12px;background:rgba(var(--color-base),.4);border-radius:8px}.ai-notice[data-astro-cid-owie4l4w]{margin-top:16px;display:flex;align-items:center;justify-content:center;gap:8px;color:rgba(var(--color-main),.35);font-size:.75rem;text-align:center;max-width:600px;margin-left:auto;margin-right:auto;line-height:1.5}.ai-notice[data-astro-cid-owie4l4w] svg[data-astro-cid-owie4l4w]{flex-shrink:0;opacity:.6}.filter-info[data-astro-cid-owie4l4w]{display:inline-flex;align-items:center;gap:8px;background:rgba(var(--color-theme),.1);border:1px solid rgba(var(--color-theme),.2);padding:6px 12px;border-radius:100px;margin-bottom:16px;animation:fadeIn .3s ease-out}.filter-info[data-astro-cid-owie4l4w] .filter-label[data-astro-cid-owie4l4w]{font-size:.8rem;font-weight:700;color:rgb(var(--color-theme))}.filter-info[data-astro-cid-owie4l4w] .filter-value[data-astro-cid-owie4l4w]{font-size:.85rem;font-weight:600;color:rgb(var(--color-main))}.filter-info[data-astro-cid-owie4l4w] .btn-clear[data-astro-cid-owie4l4w]{background:none;border:none;padding:4px;cursor:pointer;color:rgba(var(--color-main),.4);display:flex;align-items:center;border-radius:50%;transition:all .2s}.filter-info[data-astro-cid-owie4l4w] .btn-clear[data-astro-cid-owie4l4w]:hover{background:rgba(var(--color-theme),.2);color:rgb(var(--color-theme))}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}