:root{--color-primary: #0f3460;--color-primary-dark: #16213e;--color-bg-dark: #1a1a2e;--color-accent: #27ae60;--color-warning: #f39c12;--color-danger: #e74c3c;--color-info: #3498db;--font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Roboto", "Oxygen", "Ubuntu", sans-serif;--font-size-base: 16px;--font-size-sm: .875rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--touch-target-min: 44px;--touch-target-comfortable: 48px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .12);--shadow-md: 0 4px 12px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .2);--transition-fast: .15s ease;--transition-normal: .25s ease;--z-dropdown: 100;--z-modal: 200;--z-toast: 300;--square-size: 40px;--piece-size: 34px;--label-size: 20px}@media (min-width: 600px){:root{--square-size: 52px;--piece-size: 44px;--label-size: 22px}}@media (min-width: 900px){:root{--square-size: 64px;--piece-size: 54px;--label-size: 24px}}@media (min-width: 1200px){:root{--square-size: 70px;--piece-size: 60px;--label-size: 26px}}*{box-sizing:border-box}html,body{margin:0;padding:0;font-family:var(--font-family);font-size:var(--font-size-base);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%;text-size-adjust:100%}body{background-color:var(--color-bg-dark);color:#333;overscroll-behavior:none}h1,h2,h3,h4,h5,h6,p{margin:0}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}html{scroll-behavior:smooth}::selection{background-color:var(--color-primary);color:#fff}button,[role=button],a,input[type=checkbox],input[type=radio],select{min-height:var(--touch-target-min);min-width:var(--touch-target-min)}button,.btn,[role=button]{padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-base);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:rgba(0,0,0,.1)}::-webkit-scrollbar{width:6px;height:6px}@media (min-width: 600px){::-webkit-scrollbar{width:8px;height:8px}}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb{background:#888;border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:#555}.mobile-only{display:block}.tablet-up,.desktop-only{display:none}@media (min-width: 600px){.mobile-only{display:none}.tablet-up{display:block}}@media (min-width: 900px){.desktop-only{display:block}}.text-center-mobile{text-align:center}@media (min-width: 600px){.text-center-mobile{text-align:left}}.safe-area-padding{padding-left:env(safe-area-inset-left,0);padding-right:env(safe-area-inset-right,0);padding-bottom:env(safe-area-inset-bottom,0)}@media screen and (max-width: 600px){input,select,textarea{font-size:16px!important}}