@import"https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap";.card-deck{position:relative;width:min(100%,340px);height:min(52vh,420px);margin:0 auto}.swipe-card{position:absolute;inset:0;touch-action:none;cursor:grab}.swipe-card--top:active{cursor:grabbing}.swipe-stamp{position:absolute;top:1.5rem;padding:.35rem .75rem;border-radius:8px;font-size:.8125rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;z-index:2;pointer-events:none;border:3px solid currentColor}.swipe-stamp--remember{right:1.25rem;color:var(--success);transform:rotate(12deg)}.swipe-stamp--forget{left:1.25rem;color:var(--danger);transform:rotate(-12deg)}.flip-card{width:100%;height:100%;border-radius:24px;padding:0;position:relative;perspective:1200px;background:transparent;box-shadow:0 20px 50px #00000073,0 0 0 1px #ffffff14}.flip-card__inner{width:100%;height:100%;position:relative;transform-style:preserve-3d}.flip-card__face{width:100%;height:100%;border-radius:24px;padding:2rem 1.5rem;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:linear-gradient(160deg,var(--surface-elevated) 0%,var(--surface) 100%);backface-visibility:hidden;-webkit-backface-visibility:hidden}.flip-card__face--back{background:linear-gradient(160deg,#2a2840 0%,var(--surface) 100%);border:1px solid rgba(108,92,231,.35);transform:rotateY(180deg);position:absolute;inset:0}.flip-card__label{font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);margin-bottom:1rem}.flip-card__face--back .flip-card__label{color:var(--accent-secondary)}.flip-card__text{margin:0;font-size:1.375rem;font-weight:600;line-height:1.35;word-break:break-word;max-height:60%;overflow:auto}:root{--bg: #0f0f14;--surface: #1a1a24;--surface-elevated: #242433;--text: #f4f4f8;--muted: #9898b0;--accent: #ff5c7a;--accent-secondary: #6c5ce7;--success: #2dd4a8;--danger: #ff6b4a;--radius: 20px;--fab-size: 56px;font-family:DM Sans,system-ui,-apple-system,sans-serif;line-height:1.45;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,*:before,*:after{box-sizing:border-box}html,body,#root{margin:0;min-height:100%;min-height:100dvh;background:var(--bg);color:var(--text)}body{overflow:hidden;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button,textarea{font:inherit}button{cursor:pointer;border:none;background:none;color:inherit}.app{position:relative;display:flex;flex-direction:column;min-height:100dvh;padding:max(1rem,env(safe-area-inset-top)) 1.25rem max(1.5rem,env(safe-area-inset-bottom));background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(108,92,231,.35),transparent),radial-gradient(ellipse 60% 40% at 100% 100%,rgba(255,92,122,.2),transparent),var(--bg)}.app__header{text-align:center;padding:.5rem 0 1rem}.app__title{margin:0;font-size:1.125rem;font-weight:600;letter-spacing:.02em}.app__level-badge{margin-top:.35rem;font-size:.8125rem;color:var(--muted)}.app__level-badge strong{color:var(--accent-secondary);font-weight:600}.app__main{flex:1;display:flex;align-items:center;justify-content:center;position:relative}.fab{position:fixed;width:var(--fab-size);height:var(--fab-size);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 24px #00000073,0 0 0 1px #ffffff0f inset;z-index:40;transition:transform .2s ease,box-shadow .2s ease}.fab:active{transform:scale(.94)}.fab--add{right:max(1.25rem,env(safe-area-inset-right));bottom:max(1.5rem,env(safe-area-inset-bottom));background:linear-gradient(135deg,var(--accent),#ff8fa3);color:#fff;font-size:1.75rem;font-weight:300;line-height:1}.fab--level{left:max(1.25rem,env(safe-area-inset-left));bottom:max(1.5rem,env(safe-area-inset-bottom));background:var(--surface-elevated);color:var(--text);font-size:1.125rem;font-weight:700;border:2px solid var(--accent-secondary)}.dialog-backdrop{position:fixed;inset:0;background:#08080cb8;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:100;display:flex;align-items:flex-end;justify-content:center;padding:1rem;padding-bottom:max(1rem,env(safe-area-inset-bottom))}@media(min-width:480px){.dialog-backdrop{align-items:center}}.dialog{width:100%;max-width:400px;background:var(--surface);border-radius:var(--radius);padding:1.5rem;box-shadow:0 24px 80px #00000080;border:1px solid rgba(255,255,255,.08)}.dialog h2{margin:0 0 1.25rem;font-size:1.25rem;font-weight:600}.dialog label{display:block;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:.4rem}.dialog textarea{width:100%;min-height:88px;padding:.75rem 1rem;border-radius:12px;border:1px solid rgba(255,255,255,.1);background:var(--bg);color:var(--text);resize:vertical;margin-bottom:1rem}.dialog textarea:focus{outline:2px solid var(--accent-secondary);outline-offset:0}.dialog__actions{display:flex;gap:.75rem;margin-top:.5rem}.btn{flex:1;padding:.85rem 1rem;border-radius:12px;font-weight:600;font-size:.9375rem}.btn--ghost{background:transparent;color:var(--muted)}.btn--primary{background:linear-gradient(135deg,var(--accent-secondary),#8b7cf7);color:#fff}.empty-state{text-align:center;max-width:280px;animation:fade-up .5s ease}.empty-state__icon{width:72px;height:72px;margin:0 auto 1.25rem;border-radius:20px;background:linear-gradient(145deg,var(--surface-elevated),var(--surface));display:flex;align-items:center;justify-content:center;font-size:2rem;border:1px solid rgba(255,255,255,.06)}.empty-state h2{margin:0 0 .5rem;font-size:1.375rem;font-weight:600}.empty-state p{margin:0 0 1.5rem;color:var(--muted);font-size:.9375rem}.deck-done{text-align:center;color:var(--muted);animation:fade-up .4s ease}.deck-done strong{display:block;color:var(--text);font-size:1.125rem;margin-bottom:.35rem}.level-picker{display:flex;flex-direction:column;gap:.5rem}.level-option{display:flex;align-items:center;justify-content:space-between;padding:.9rem 1rem;border-radius:14px;background:var(--bg);border:2px solid transparent;text-align:left;width:100%;transition:border-color .15s,background .15s}.level-option--active{border-color:var(--accent-secondary);background:#6c5ce71f}.level-option__name{font-weight:600}.level-option__meta{font-size:.8125rem;color:var(--muted)}.swipe-hint{position:absolute;bottom:calc(var(--fab-size) + 2.5rem);left:0;right:0;text-align:center;font-size:.75rem;color:var(--muted);pointer-events:none;opacity:.85}@keyframes fade-up{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}