/* Shared responsive contract: 360/390/430/768/1024/1440/1920. */
html{overflow-x:hidden}body{max-width:100%;overflow-x:hidden}img,svg,video{max-width:100%;height:auto}button,input,select,textarea{max-width:100%;font:inherit}pre,code{max-width:100%;overflow:auto}.wrap{width:min(100% - 40px,var(--container-reading));margin-inline:auto}.mobile-nav-toggle{display:none}
@media (min-width:1440px){.shell{width:min(100% - 64px,var(--container-wide))}.hero{gap:var(--space-8)}.hub{gap:var(--space-5)}}
@media (max-width:1023px){.hero{grid-template-columns:1fr;min-height:auto}.arena{max-width:none;min-height:320px}.results.show{grid-template-columns:repeat(2,minmax(0,1fr))}.choice:last-child{grid-column:1/-1}.hub{grid-template-columns:1fr}.mobile-nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;margin-left:auto;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface-interactive);color:var(--text-strong)}.nav-links{display:none;position:absolute;top:calc(100% + var(--space-2));left:20px;right:20px;z-index:10;flex-direction:column;align-items:stretch;gap:var(--space-1);margin:0;padding:var(--space-2);border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface-raised);box-shadow:var(--shadow-lg)}.nav-links.is-open{display:flex}.nav-links a,.nav-links button{display:flex;align-items:center;min-height:44px;padding:var(--space-2) var(--space-3)}}
@media (max-width:767px){.shell,.wrap{width:min(100% - 32px,100%)}.bar{min-height:66px;gap:var(--space-2)}.logo-mark{width:86px;height:58px}.logo-wordmark{font-size:16px}.tagline{display:none}main{padding-block:var(--space-6)}.hero{gap:var(--space-5)}.intro h1{font-size:clamp(40px,11vw,58px)}.intro p{font-size:16px}.lookup{grid-template-columns:1fr}.lookup input,.lookup select,.lookup button{width:100%;min-height:46px}.hero-proof{grid-template-columns:1fr}.hero-proof>div{min-height:64px}.arena{min-height:280px}.sectionhead{align-items:start;flex-direction:column;gap:var(--space-2);margin-top:var(--space-6)}.sectionhead h2{font-size:var(--type-h2)}.sectionhead p{text-align:left}.results.show,.info{grid-template-columns:1fr}.choice:last-child{grid-column:auto}.choicebody{padding:var(--space-3)}.deck-card-grid,.day-cards{grid-template-columns:repeat(4,minmax(0,1fr))}.deck-card,.day-card{padding:5px}.hub-panel,.info article,.tool-card,.generated-deck{padding:var(--space-4)}.how-it-works{grid-template-columns:1fr;margin-block:var(--space-5)}.manual-actions,.copy-deck-action,.generated-deck-actions,.day-actions{display:grid;grid-template-columns:1fr}.btn-game-primary,.btn-game-secondary,.btn-game-tertiary,.day-primary{width:100%;min-height:48px}.footer{font-size:var(--type-body-small)}}
@media (max-width:479px){.shell,.wrap{width:min(100% - 28px,100%)}.bar{min-height:62px}.logo-mark{width:76px;height:51px}.logo-wordmark{font-size:14px}.intro h1{font-size:clamp(36px,12vw,49px)}.intro p{font-size:15px}.hero-points span{font-size:var(--type-label)}.arena{min-height:244px}.arena-card{width:76px;padding:6px;font-size:var(--type-label)}.arena-card i{font-size:20px}.choicehead{padding:var(--space-3)}.choicehead h3{font-size:20px}.card{min-height:90px;padding:5px}.card b,.deck-card b,.day-card b{font-size:11px}.card small,.deck-card small{font-size:11px}.generated-deck{scroll-margin-top:76px}.scores{gap:6px}}