:root{color:#0f3034;background:#f7f2e8;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input{font:inherit}button{border:1px solid #b9c5bd;border-radius:8px;background:#fff;color:#0f3034;min-height:44px;padding:.65rem .9rem;cursor:pointer}button:disabled,input:disabled{cursor:not-allowed;opacity:.55}button:focus-visible,input:focus-visible{outline:3px solid rgba(20,92,90,.28);outline-offset:2px}.app-shell{height:100dvh;overflow:hidden;padding:max(1rem,env(safe-area-inset-top)) max(1rem,env(safe-area-inset-right)) max(1rem,env(safe-area-inset-bottom)) max(1rem,env(safe-area-inset-left))}.workspace{width:min(1180px,100%);height:100%;margin:0 auto;display:grid;grid-template-rows:auto minmax(0,1fr);gap:1rem}.top-bar,.board-toolbar,.actions,.capture-actions{display:flex;align-items:center}.top-bar{justify-content:space-between;gap:1rem;padding:.25rem 0 0}h1,h2,p{margin:0}.brand-button{display:grid;justify-items:start;min-height:0;border:0;padding:0;background:transparent;text-align:left}.brand-stack{display:grid;gap:.35rem;min-width:0}h1{font-size:clamp(2rem,5vw,4.8rem);line-height:.95}h2{font-size:1.25rem}.eyebrow{color:#d0523f;font-size:.74rem;font-weight:800;letter-spacing:0;text-transform:uppercase}.top-menu{position:relative;display:flex;gap:.45rem;flex:0 0 auto}.icon-button{display:grid;place-items:center;width:44px;min-width:44px;padding:0;font-size:1.45rem;line-height:1;font-weight:800}.menu-popover{position:absolute;right:0;top:calc(100% + .4rem);z-index:10;display:grid;gap:.25rem;width:190px;padding:.4rem;border:1px solid #d7ddd4;border-radius:8px;background:#fff;box-shadow:0 16px 42px #0f303429}.menu-popover button{justify-content:start;width:100%;border:0;text-align:left}.breadcrumbs{display:flex;align-items:center;gap:.35rem;margin:0;color:#0f3034;font-size:1rem;font-weight:800}.breadcrumbs button,.breadcrumbs span{min-height:32px;display:inline-flex;align-items:center}.breadcrumbs button{min-height:34px;border-color:#145c5a33;padding:.25rem .65rem;background:#ffffffc2;color:#145c5a;font-weight:800}.breadcrumbs [aria-current=page]{min-height:34px;border:1px solid rgba(69,99,102,.18);border-radius:8px;padding:.25rem .65rem;background:#ffffff94;color:#0f3034}.content-grid{display:grid;grid-template-columns:minmax(280px,360px) minmax(0,1fr);gap:1rem;align-items:stretch;min-height:0;overflow:hidden}.route-library,.route-add-sudoku,.route-account,.route-settings{grid-template-columns:minmax(260px,320px) minmax(0,1fr)}.auth-panel,.capture-panel,.saved-panel,.settings-panel,.side-panel,.board-panel{background:#ffffffd1;border:1px solid #d7ddd4;border-radius:8px;padding:1rem}.main-route-panel{width:100%;height:100%;min-height:0;align-content:start;overflow:auto}.account-page-shell{display:grid;justify-items:center;align-content:center;background:linear-gradient(#ffffffad,#ffffffbd),url(/SparrowsNest-banner.webp) center / cover;border:1px solid #d7ddd4;border-radius:8px;padding:1rem}.account-page-panel{width:50%;min-width:320px}.capture-panel,.saved-panel{display:grid;gap:.85rem}.settings-panel{display:grid;gap:1rem}.settings-group{display:grid;gap:1rem;max-width:560px}.settings-group h3{margin:0 0 .35rem;font-size:1rem}.language-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.55rem}.language-option{min-height:52px;font-weight:800}.language-option.active{border-color:#145c5a;background:#e0f0ef;color:#0f3034;box-shadow:inset 0 0 0 2px #145c5a}.home-sidebar{display:grid;grid-template-rows:minmax(0,1fr) auto;gap:1rem;height:100%;min-height:0;overflow:hidden}.side-panel{display:grid;gap:.85rem;min-height:0;overflow:auto}.account-side-panel{align-self:end;overflow:visible}.account-side-banner{background:linear-gradient(#ffffffdb,#ffffffe6),url(/SparrowsNest-banner.webp) center / cover}.account-side-panel form,.account-side-panel .account-panel{justify-items:center}.account-side-panel label{width:100%}.account-side-panel .primary-button,.account-side-panel .text-button{justify-self:center;text-align:center}.stretch-side-panel{align-content:start}.panel-heading,.board-toolbar{margin-bottom:1rem}.auth-panel form{display:grid;gap:1rem}.auth-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:.45rem;border-bottom:1px solid #b9c5bd}.auth-tabs button{min-height:38px;padding:.45rem .35rem;border:0;border-bottom:3px solid transparent;border-radius:0;background:transparent;font-size:.86rem;font-weight:800}.auth-tabs .active{border-bottom-color:#145c5a;color:#145c5a}.auth-links{display:grid;justify-items:center;gap:.25rem;margin-top:auto;text-align:center}.auth-links .text-button{min-height:32px;padding-block:.2rem}.compact-form{display:grid;gap:.85rem}.account-panel{display:grid;gap:1rem}.auth-panel form,.side-panel form{gap:1rem}.auth-panel .primary-button,.side-panel .primary-button{justify-self:center;margin-top:.25rem}.account-page-panel .primary-button{justify-self:center;width:min(100%,33%);min-width:180px}label{display:grid;gap:.35rem;color:#456366;font-weight:700}input{width:100%;min-height:46px;border:1px solid #b9c5bd;border-radius:8px;padding:0 .75rem;background:#fff;color:#0f3034}input[type=file]{min-height:auto;border:0;padding:0;background:transparent}.checkbox-row{display:flex;align-items:center;gap:.55rem}.checkbox-row input{width:18px;min-height:18px;accent-color:#145c5a}.hidden-input{display:none}.capture-actions{gap:.55rem}.preview-image{width:100%;aspect-ratio:4 / 3;object-fit:cover;border:1px solid #d7ddd4;border-radius:8px;background:#fff}.full-width{width:100%}.primary-button{border-color:#145c5a;background:#145c5a;color:#fff;font-weight:800}.text-button{border:0;padding-inline:0;color:#145c5a;background:transparent;font-weight:800}.message{color:#456366;margin-top:.8rem;line-height:1.45}.small-note{color:#456366;font-size:.9rem;line-height:1.35}.saved-list{display:grid;gap:.45rem;max-height:min(64vh,680px);overflow:auto}.main-library{height:100%;min-height:0;align-content:start;overflow:hidden}.main-library .saved-list{max-height:none;min-height:0}.saved-item{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.4rem;align-items:stretch}.saved-main{display:grid;justify-items:start;gap:.2rem;min-width:0;text-align:left}.saved-main span,.saved-main small{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.saved-main small{color:#456366;font-size:.78rem}.delete-button{color:#a33b28;padding-inline:.65rem}.board-toolbar{justify-content:space-between;gap:1rem}.status-ok,.status-error{min-width:84px;text-align:center;border-radius:999px;padding:.35rem .7rem;font-weight:800}.status-ok{background:#d9ede2;color:#145c5a}.status-error{background:#ffe0d9;color:#a33b28}.sudoku-board{display:grid;grid-template-columns:repeat(9,1fr);width:min(100%,610px);aspect-ratio:1;border:3px solid #0f3034;background:#0f3034}.cell{display:grid;place-items:center;min-height:0;padding:0;border:1px solid #b9c5bd;border-radius:0;background:#fff;color:#145c5a;font-size:clamp(1.1rem,6vw,2.2rem);font-weight:800}.cell:nth-child(3n){border-right-color:#0f3034;border-right-width:3px}.cell:nth-child(n+19):nth-child(-n+27),.cell:nth-child(n+46):nth-child(-n+54){border-bottom-color:#0f3034;border-bottom-width:3px}.cell:nth-child(9n){border-right-width:1px}.cell.selected{background:#e0f0ef;box-shadow:inset 0 0 0 3px #d0523f}.cell.given{color:#0f3034}.digit-pad{display:grid;grid-template-columns:repeat(10,minmax(44px,1fr));gap:.4rem;margin-top:1rem}.digit-pad button{padding-inline:.3rem;font-weight:800}.actions{gap:.6rem;margin-top:1rem}@media(max-width:820px){.top-bar{display:flex;align-items:flex-start}.app-shell{min-height:100dvh;height:auto;overflow:visible}.workspace{height:auto}.content-grid{display:grid;overflow:visible}.content-grid{grid-template-columns:1fr}.account-page-panel{width:100%;min-width:0}.breadcrumbs,.home-sidebar{display:none}.top-menu{justify-self:end}.digit-pad{grid-template-columns:repeat(5,minmax(44px,1fr))}}