:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--bg: #556580;--panel: rgba(255, 255, 255, .11);--panel-strong: rgba(255, 255, 255, .17);--border: rgba(255, 255, 255, .16);--text: #f3f6ff;--muted: rgba(243, 246, 255, .74);--primary: #6f7bff;--secondary: #00d6c7;--accent: #ff9a7a;--danger: #ff5a83;--radius: 18px;--shadow: 0 12px 28px rgba(0, 0, 0, .22)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:radial-gradient(900px 560px at 12% 12%,#6b7aa0 0%,transparent 60%),radial-gradient(760px 520px at 86% 18%,#5c6e95 0%,transparent 60%),radial-gradient(980px 760px at 50% 105%,#46526d 0%,transparent 72%),var(--bg);min-height:100vh}.app{min-height:100%;display:flex;flex-direction:column}.header{padding:14px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0000002e;border-bottom:1px solid var(--border);position:relative;top:0;z-index:10}.topbar{display:flex;justify-content:space-between;align-items:center;max-width:1100px;margin:0 auto;gap:12px}.brand{display:flex;align-items:center;gap:10px;font-weight:800}.logo{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary))}.nav{display:flex;gap:8px}.tab-btn{border:1px solid var(--border);background:var(--panel);color:var(--text);padding:8px 14px;border-radius:999px;font-weight:700;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.tab-btn.is-active{background:linear-gradient(135deg,var(--primary),var(--secondary));border-color:transparent;color:#fff}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.muted{color:var(--muted);font-size:14px}.screen-pad{padding-bottom:24px}.admin-layout{display:grid;gap:16px}@media(min-width:980px){.admin-layout{grid-template-columns:350px 1fr;align-items:start}}.stack{display:grid;gap:14px}.deck-list{display:grid;gap:10px;margin-top:12px}.deck-item{border:1px solid var(--border);border-radius:14px;padding:12px;background:var(--panel-strong)}.deck-title{display:flex;justify-content:space-between;align-items:center;gap:10px}.deck-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.deck-actions{margin-top:10px}.pill{font-size:12px;padding:4px 10px;border-radius:999px;background:#ffffff26;border:1px solid rgba(255,255,255,.12);text-align:center}.row-tight{margin-top:10px;align-items:center}.scroll{margin-top:12px;max-height:55vh;overflow:auto;padding-right:6px;border-top:1px solid rgba(255,255,255,.1)}.card-row{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.1)}.card-row:last-child{border-bottom:none}.q{font-weight:800}.a{margin-top:6px}.input{background:var(--panel-strong);border:1px solid var(--border);color:var(--text)}.input::placeholder,textarea::placeholder,select::placeholder{color:#f3f6ff8c;opacity:1}.input:focus::placeholder{color:#f3f6ffb3}.app{min-height:100vh}.main{padding:16px;max-width:1100px;margin:0 auto}.header{width:100%}.topbar{max-width:1100px;margin:0 auto;padding:0}.container{width:min(1100px,calc(100% - 32px));margin-left:auto!important;margin-right:auto!important}.main{padding:16px 0}.topbar,body #root,body .app{width:100%}.screen-pad{padding-bottom:48px}.progress{display:flex;justify-content:space-between;margin-top:12px;font-size:14px;color:var(--muted)}.flashcard{margin-top:20px;padding:36px 28px;border-radius:22px;background:var(--panel-strong);border:1px solid var(--border);box-shadow:var(--shadow);min-height:280px;display:flex;flex-direction:column;justify-content:center;align-items:stretch;text-align:left}.label{font-size:12px;text-transform:uppercase;letter-spacing:1px;font-weight:800;color:var(--muted)}.side{font-size:22px;font-weight:600;line-height:1.4}.side.muted{opacity:.6;font-weight:600}.row{display:flex;gap:12px;flex-wrap:wrap}.row>*{flex:1 1 140px}.btn{padding:12px 16px;border-radius:14px;font-weight:700;cursor:pointer;transition:transform .12s ease,opacity .12s ease;border:1px solid var(--border);background:var(--panel-strong);color:var(--text)}.btn:hover{transform:translateY(-2px);opacity:.95}.btn:active{transform:translateY(0)}.btn.primary{background:linear-gradient(135deg,var(--primary),var(--secondary));border-color:transparent;color:#fff}.btn.success{background:linear-gradient(135deg,var(--secondary),#54f0e1);border-color:transparent;color:#05211f}.btn.accent{background:linear-gradient(135deg,var(--accent),#ffc0ad);border-color:transparent;color:#2a0c05}.btn.danger{background:linear-gradient(135deg,var(--danger),#ff9ab0);border-color:transparent;color:#2a0010}select{background:var(--panel-strong);border:1px solid var(--border);color:var(--text);border-radius:14px;padding:10px 12px}.flip-wrap{display:flex;justify-content:center}.flip-card{width:100%;max-width:780px;min-height:300px;perspective:1800px;perspective-origin:50% 40%}.flip-inner{position:relative;width:100%;min-height:300px;transform-style:preserve-3d;transition:transform .82s cubic-bezier(.18,.88,.2,1);will-change:transform}.flip-card.is-flipped .flip-inner{transform:rotateY(180deg) rotateX(2deg)}.flip-card:not(.is-flipped) .flip-inner{transform:rotateY(0) rotateX(2deg)}.flip-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--panel-strong);border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow);padding:36px 28px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;gap:14px;background-image:radial-gradient(800px 280px at 30% 10%,rgba(255,255,255,.1),transparent 55%),radial-gradient(700px 260px at 80% 90%,rgba(0,0,0,.18),transparent 60%)}.flip-back{transform:rotateY(180deg)}.flip-face:before{content:"";position:absolute;inset:0;border-radius:22px;pointer-events:none;box-shadow:inset 0 1px #ffffff1f,inset 0 -1px #0003}@media(max-width:520px){.flip-card,.flip-inner{min-height:260px}.flip-face{padding:26px 18px}}.admin-layout>*{min-width:0}@media(min-width:980px){.admin-layout{grid-template-columns:minmax(0,350px) minmax(0,1fr)}}.admin-layout,.admin-layout *{overflow-wrap:anywhere;word-break:break-word}.admin-layout .card{overflow:hidden}.admin-layout .scroll{overflow:auto}.topbar{flex-wrap:wrap;align-items:center}.nav{flex-wrap:wrap;justify-content:flex-end;width:100%;gap:8px}@media(max-width:520px){.tab-btn{padding:8px 10px;font-size:13px;white-space:nowrap}}.flip-face{align-items:stretch;text-align:left}.flip-face{justify-content:flex-start}.flip-card{width:100%;max-width:400px}select option{background:#46526d;color:#f3f6ff}.admin-layout--grid{display:grid;gap:16px;min-height:0}@media(min-width:980px){.admin-layout--grid{grid-template-columns:350px minmax(0,1fr);grid-template-rows:minmax(0,1fr) auto;grid-template-areas:"decks view" "tools tools";align-items:stretch}.admin-decks{grid-area:decks;min-height:0}.admin-view{grid-area:view;min-height:0}.admin-tools{grid-area:tools}}@media(max-width:979px){.admin-layout--grid{grid-template-columns:1fr;grid-template-areas:"decks" "view" "tools"}}.admin-decks .card{display:flex;flex-direction:column;min-height:0}.admin-decks .deck-list{overflow:auto;min-height:0;flex:1;padding-right:6px}.admin-tools-grid{display:grid;gap:16px}@media(min-width:980px){.admin-tools-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:start}}@media(min-width:980px){.admin-layout--grid{grid-template-columns:minmax(0,350px) minmax(0,1fr);grid-template-rows:minmax(0,1fr) auto;grid-template-areas:"decks view" "tools tools";height:calc(100vh - 140px)}.admin-decks,.admin-view{min-height:0}}.admin-decks .card{height:100%;display:flex;flex-direction:column;min-height:0}.admin-decks .deck-list{flex:1;min-height:0;overflow:auto;padding-right:6px}.admin-view .card{height:100%;display:flex;flex-direction:column;min-height:0}.admin-view .scroll{flex:1;min-height:0;overflow:auto}.about-hero{position:relative;overflow:hidden;border-radius:22px;padding:18px;border:1px solid var(--border);background:#080e1c4d;box-shadow:var(--shadow)}.about-card{border:1px solid rgba(255,255,255,.16);border-radius:18px;padding:14px;background:#0f16288c;box-shadow:0 10px 22px #00000038;opacity:0;transform:translateY(10px);animation:aboutIn .52s ease forwards}.card:has(h2:contains("About ReactCards")){background:#0a10208c!important;border-color:#ffffff2e!important}.about-hero,.about-flow,.about-card{background:#0a10208c!important;border:1px solid rgba(255,255,255,.16)!important}.about-hero:before{opacity:1!important;filter:blur(14px) saturate(1.35)!important}.about-flow{position:relative;overflow:hidden}.about-flow:before{content:"";position:absolute;inset:-40px;background:radial-gradient(520px 320px at 18% 20%,rgba(111,123,255,.55),transparent 60%),radial-gradient(480px 320px at 80% 30%,rgba(0,214,199,.45),transparent 60%),radial-gradient(620px 380px at 55% 110%,rgba(255,154,122,.45),transparent 70%);opacity:.75;filter:blur(10px) saturate(1.5);pointer-events:none}.about-flow>*{position:relative;z-index:1}.flow-pill{background:#0f1628b3!important;border-color:#ffffff2e!important}.flow-pill:nth-of-type(1){box-shadow:0 0 0 1px #6f7bff40,0 10px 22px #00000038;background:linear-gradient(135deg,#6f7bff61,#0f1628bf)!important}.flow-pill:nth-of-type(2){box-shadow:0 0 0 1px #00d6c738,0 10px 22px #00000038;background:linear-gradient(135deg,#00d6c757,#0f1628bf)!important}.flow-pill:nth-of-type(3){box-shadow:0 0 0 1px #ff9a7a38,0 10px 22px #00000038;background:linear-gradient(135deg,#ff9a7a57,#0f1628bf)!important}.flow-pill:nth-of-type(4){box-shadow:0 0 0 1px #ff5a8338,0 10px 22px #00000038;background:linear-gradient(135deg,#ff5a834d,#0f1628bf)!important}.about-card{background:#0f1628b8!important;border-color:#ffffff2e!important;box-shadow:0 12px 26px #00000040!important}@media(min-width:980px){.admin-tools-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:stretch!important;grid-auto-rows:1fr}.admin-tools-grid>*{height:100%;min-height:0}.admin-tools-grid>.card{height:100%;display:flex;flex-direction:column}.admin-tools-grid>*>.card{height:100%;display:flex;flex-direction:column}}.brand-logo{width:60px;height:60px;object-fit:contain}.flip-face{background:#fff!important;border-width:3px!important;border-style:solid!important;box-shadow:0 12px 28px #00000026!important}.flip-card:not(.is-flipped) .flip-face{border-color:var(--primary)!important;color:var(--primary)!important}.flip-card.is-flipped .flip-face,.flip-back{border-color:var(--danger)!important;color:var(--danger)!important}.label{font-weight:900;letter-spacing:1px;opacity:.8}.flip-card:not(.is-flipped) .label{color:var(--primary)}.flip-card.is-flipped .label,.flip-back .label{color:var(--danger)}.flip-face p,.flip-face strong,.flip-face em{color:inherit}.flip-card:not(.is-flipped)~.row .next-btn{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff}.screen-pad .btn.primary,.screen-pad .btn.primary:visited{background:linear-gradient(135deg,var(--danger),#ff9ab0)!important;border-color:transparent!important;color:#2a0010!important}.screen-pad .btn.primary:hover{opacity:.95}.btn.next{background:linear-gradient(135deg,var(--primary),var(--secondary))!important;border-color:transparent!important;color:#fff!important}.btn.next:hover{opacity:.95}.btn.select{background:linear-gradient(135deg,var(--primary),#4f63ff)!important;border-color:transparent!important;color:#fff!important}.btn.select:hover{opacity:.95}.btn.rename{background:linear-gradient(135deg,var(--primary),var(--secondary))!important;border-color:transparent!important;color:#fff!important}.btn.rename:hover{opacity:.95}.btn.shuffle{background:linear-gradient(135deg,var(--primary),#4f63ff)!important;border-color:transparent!important;color:#fff!important}.btn.shuffle:hover{opacity:.95}.footer{margin-top:40px;padding:20px 0;border-top:1px solid var(--border);background:#00000040;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.footer-inner{text-align:center}.footer-text{font-size:14px;color:var(--muted)}.footer-link{color:var(--primary);font-weight:700;text-decoration:none;transition:opacity .2s ease}.footer-link:hover{opacity:.75}.topbar{flex-wrap:nowrap}.brand{flex:0 0 auto;min-width:0}.nav{width:auto;flex:0 0 auto;flex-wrap:nowrap}.topbar{justify-content:space-between}.nav{margin-left:auto}@media(max-width:420px){.topbar{flex-wrap:wrap}.nav{width:100%;flex-wrap:wrap;justify-content:flex-end}}