:root{--bg: #0e2a47;--bg-soft: #12385e;--primary: #ffd400;--card: #0d2a46;--card-border: rgba(255,255,255,.15);--muted: #9bb1c8;--white: #fff}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:linear-gradient(180deg,var(--bg) 0%,var(--bg-soft) 100%);color:var(--white)}.app{min-height:100%;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.08);background:#00000026;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);position:sticky;top:0;z-index:10}.brand{font-weight:800;letter-spacing:.4px}.spacer{flex:1}.tab{background:transparent;color:var(--white);border:1px solid rgba(255,255,255,.2);padding:6px 12px;border-radius:10px;cursor:pointer}.tab.active{background:#ffffff26}.tab:disabled{opacity:.5;cursor:not-allowed}.topbar h1{text-align:center}.site-header{margin-bottom:20px}.site-title{font-size:3rem;font-weight:900;color:var(--primary);text-shadow:2px 2px 6px rgba(0,0,0,.5);margin:0}.site-subtitle{font-size:1.2rem;color:var(--muted);margin-top:6px}.builder{padding:24px;max-width:1100px;margin:0 auto}.toolbar .row{display:flex;gap:8px;align-items:center;margin-bottom:10px;flex-wrap:wrap}.label{width:90px;color:var(--muted)}.input,.select,.btn{font:inherit}.input,.select{background:#0b2a47;color:var(--white);border:1px solid var(--card-border);border-radius:10px;padding:8px 10px;min-width:220px}.input.answer{min-height:70px;resize:vertical}.input.value{width:110px}.btn{border:1px solid var(--card-border);padding:8px 12px;border-radius:10px;background:#0b2a47;color:var(--white);cursor:pointer}.btn.primary{background:var(--primary);color:#111;border-color:#e6c200}.btn.ghost{background:transparent}.btn.danger{border-color:#ff6b6b99;color:#ff9a9a}.btn.tiny{padding:4px 8px}.categories-editor{display:grid;gap:16px}.category-editor{border:1px solid var(--card-border);background:#ffffff0a;border-radius:12px;padding:12px}.category-header{display:flex;gap:10px;align-items:center;justify-content:space-between}.category-title-input{flex:1}.category-actions{display:flex;gap:8px}.rows{margin-top:10px;display:grid;gap:8px}.row-editor{display:grid;grid-template-columns:120px 1fr 40px;gap:8px;align-items:stretch}.muted{color:var(--muted);margin:0}.add-category{display:flex;align-items:center;justify-content:center;margin-top:8px}.board-wrap{max-width:1200px;margin:0 auto;padding:24px}.board-header{text-align:center;margin-bottom:12px}.app-title{margin:0;font-size:28px}.subtitle{color:var(--muted);margin:6px 0 0}.grid{display:grid;gap:10px}.col{display:grid;gap:10px;grid-auto-rows:minmax(80px,auto)}.category-title{background:#082445;color:var(--primary);border:1px solid var(--card-border);border-radius:12px;display:grid;place-items:center;font-weight:800;text-align:center;padding:8px;min-height:68px}.empty-cell{border-radius:12px;border:1px dashed rgba(255,255,255,.12);opacity:.4}.card{perspective:1000px;position:relative;border:none;padding:0;background:transparent;cursor:pointer;border-radius:12px}.card:disabled{cursor:not-allowed}.card-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.8,.2,1)}.card.is-flipped .card-inner{transform:rotateY(180deg)}.card-face{position:absolute;inset:0;display:grid;place-items:center;border-radius:12px;border:1px solid var(--card-border);background:linear-gradient(180deg,#0d2a46,#0a1f35);padding:10px;backface-visibility:hidden}.card-front .money{font-size:28px;font-weight:900;color:var(--primary);text-shadow:0 1px 0 rgba(0,0,0,.4)}.card-back{transform:rotateY(180deg);background:linear-gradient(180deg,#0a1f35,#0d2a46)}.card-back .answer{font-size:16px;line-height:1.25;color:#e7eef7;text-align:center;white-space:pre-wrap}.card.is-used .card-front .money{text-decoration:line-through;opacity:.5}