:root{--color-bg: #ffffff;--color-surface: #f7f9fb;--color-elevated: #ffffff;--color-border: #e6e9ee;--color-muted: #667085;--color-text: #0f1720;--color-primary: #4172A1;--color-primary-600: #355d82;--color-accent: #EFBF00;--color-danger: #d92d20;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--shadow-1: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 1px rgba(16, 24, 40, .04);--shadow-2: 0 10px 20px rgba(16, 24, 40, .08);--font-sans: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";--text-xs: 12px;--text-sm: 14px;--text-md: 16px;--text-lg: 18px;--text-xl: 22px;--text-2xl: 28px}*,*:before,*:after{box-sizing:border-box}*{margin:0}html,body,#root{height:100%}body{line-height:1.5;-webkit-font-smoothing:antialiased}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-600)}body{font-family:var(--font-sans);background:radial-gradient(1000px 600px at 0% -20%,rgba(65,114,161,.06) 0%,transparent 60%),radial-gradient(1000px 600px at 120% -20%,rgba(239,191,0,.06) 0%,transparent 60%),var(--color-bg);color:var(--color-text)}.container{max-width:1200px;margin:0 auto;padding:var(--space-3)}.muted{color:var(--color-muted)}hr{border:none;border-top:1px solid var(--color-border);margin:var(--space-6) 0}.btn{display:inline-flex;align-items:center;gap:var(--space-2);padding:10px 14px;border-radius:var(--radius-sm);border:1px solid transparent;font-size:var(--text-sm);background:var(--color-elevated);color:var(--color-text);box-shadow:var(--shadow-1);transition:background .12s ease,border-color .12s ease,transform 80ms ease}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn:disabled,.btn[aria-disabled=true]{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.btn:disabled:hover,.btn[aria-disabled=true]:hover{transform:none;background:var(--color-elevated)}.btn--primary{background:var(--color-primary);color:#fff}.btn--primary:hover{background:var(--color-primary-600)}.btn--secondary{background:var(--color-elevated);border-color:var(--color-border)}.btn--secondary:hover{background:var(--color-surface)}.btn--ghost{background:transparent}.btn--ghost:hover{background:var(--color-surface)}.btn--danger{background:var(--color-danger);color:#fff}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-1);overflow:hidden}.card__header{padding:var(--space-5);border-bottom:1px solid var(--color-border)}.card__title{font-size:var(--text-xl);font-weight:600}.card__body{padding:var(--space-5)}.app-shell{display:grid;grid-template-columns:240px 1fr;grid-template-rows:60px 1fr;grid-template-areas:"sidebar topbar" "sidebar main";min-height:100vh}@media (max-width: 900px){.app-shell{grid-template-columns:1fr;grid-template-rows:56px auto;grid-template-areas:"topbar" "main"}}.topbar{grid-area:topbar;display:flex;align-items:center;justify-content:space-between;padding:0 var(--space-6);border-bottom:1px solid var(--color-border);background:var(--color-elevated);position:sticky;top:0;z-index:20}.sidebar{grid-area:sidebar;border-right:1px solid var(--color-border);background:var(--color-surface);padding:var(--space-4);position:sticky;top:0;height:100vh}.main{grid-area:main;padding:var(--space-6)}.brand{display:flex;align-items:center;gap:var(--space-3);font-weight:700;letter-spacing:.2px}.side-nav{display:flex;flex-direction:column;gap:6px;margin-top:var(--space-4)}.side-nav a{padding:12px 14px;border-radius:var(--radius-sm);color:var(--color-text);display:block}.side-nav a:hover{background:var(--color-surface)}.side-nav .active{background:var(--color-elevated);border:1px solid var(--color-border);box-shadow:inset 3px 0 0 var(--color-primary)}.desktop-only{display:block}.mobile-only{display:none}@media (max-width: 900px){.desktop-only{display:none}.mobile-only{display:inline-flex}}.drawer{position:fixed;top:0;left:0;height:100vh;width:82vw;max-width:320px;transform:translate(-100%);transition:transform .18s ease;z-index:30;border-right:1px solid var(--color-border);box-shadow:var(--shadow-2)}.drawer.open{transform:translate(0)}.backdrop{position:fixed;inset:0;background:#0f172059;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:25}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;border:1px solid var(--color-border);background:var(--color-elevated);color:var(--color-text)}.icon-btn:hover{background:var(--color-surface)}.contest-actions{display:flex;gap:8px;flex-wrap:wrap;width:100%}.contest-action{width:100%;flex:1 1 100%;white-space:nowrap}@media (min-width: 901px){.contest-actions{justify-content:flex-end;width:auto;flex:0 1 260px}.contest-action{width:auto;flex:0 0 auto}}