:root{
    --yellow:#f6e27a;
    --green:#6aa84f;
    --soft-green:#8bb56c;
    --khaki:#c8c29a;
    --beige:#f5f0e1;
    --cream:#fcfaf0;
    --white:#ffffff;
    --darkgreen:#274e13;
    --forest:#1f3b11;
    --muted:#5f674f;
    --shadow:0 24px 70px rgba(39,78,19,0.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; margin:0; background:linear-gradient(180deg, #f7f4e7 0%, #f0e9d7 100%); color:#19220f; line-height:1.6}
img,video{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:1.25rem}
section{margin-top:2rem}
.site-header{background:rgba(250,248,239,0.95);backdrop-filter:blur(10px);padding:.95rem 0;position:sticky;top:0;z-index:50;box-shadow:0 12px 30px rgba(16,24,16,0.08)}
.header-row{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.logo{font-weight:900;color:var(--forest);text-decoration:none;font-size:1.4rem;letter-spacing:.02em}
.site-nav{flex:1}
.site-nav ul{list-style:none;padding:0;margin:0;display:flex;gap:.75rem;flex-wrap:wrap;align-items:center}
.site-nav a{color:var(--forest);padding:.55rem .75rem;border-radius:999px;transition:background .25s,border .25s}
.site-nav a:hover{background:rgba(106,168,79,.12)}
.controls{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}
.controls .btn{white-space:nowrap}
.lang-switch{display:flex;gap:.4rem;}
.mobile-toggle{display:none}
.flash-top{margin:0.75rem 0 0;}
.hero{display:grid;grid-template-columns:1.2fr 0.8fr;gap:2rem;align-items:center;padding:3.25rem 0}
.hero .hero-card{background:rgba(255,255,255,0.85);border:1px solid rgba(106,168,79,.14);box-shadow:var(--shadow);border-radius:28px;padding:2rem}
.hero .eyebrow{display:inline-block;font-size:.9rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--green);margin-bottom:1rem}
.hero h1{font-size:3rem;line-height:1.05;max-width:10ch;color:var(--forest);margin:0}
.hero p{max-width:660px;color:var(--muted);font-size:1.05rem;margin:1.2rem 0}
.hero-cta{display:flex;flex-wrap:wrap;gap:1rem;margin-top:1.5rem}
.cta-large{background:var(--forest);color:var(--cream);padding:.95rem 1.5rem;border-radius:999px;box-shadow:0 18px 40px rgba(39,78,19,0.15);font-weight:700}
.card{background:var(--white);border-radius:24px;padding:2rem;margin:1.5rem 0;box-shadow:var(--shadow);border:1px solid rgba(39,78,19,.08)}
.grid{display:grid;gap:1.5rem}
.grid.columns-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.columns-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.sponsors-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:1rem;align-items:stretch}
.team-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem}
.participant{perspective:1000px;cursor:pointer}
.participant .inner{transition:transform .6s;transform-style:preserve-3d;position:relative;height:100%}
.participant.open .inner{transform:rotateY(180deg)}
.participant .front,.participant .back{position:absolute;inset:0;border-radius:18px;padding:1.2rem;backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;gap:.85rem}
.participant .front{background:linear-gradient(180deg,rgba(255,255,255,.96),#fefdf5);border:1px solid rgba(106,168,79,.18)}
.participant .back{transform:rotateY(180deg);background:linear-gradient(180deg,rgba(230,236,219,.95),#eff3df);border:1px solid rgba(39,78,19,.18)}
.participant h4{margin:0;color:var(--forest)}
.participant p{margin:0;color:var(--muted);font-size:.95rem;line-height:1.5}
.hero-panel{display:grid;gap:1rem}
.hero-panel .panel-card{background:rgba(255,255,255,.95);border-radius:20px;padding:1.5rem;box-shadow:0 18px 44px rgba(39,78,19,.08);border:1px solid rgba(39,78,19,.08)}
.hero-panel strong{display:block;margin-bottom:.5rem;color:var(--darkgreen)}
.hero-panel p{margin:0;color:var(--muted)}
.section-heading{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.section-heading h2{margin:0;font-size:1.75rem;color:var(--forest)}
.section-description{color:var(--muted);max-width:48rem;margin-top:.5rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.35rem;background:var(--green);color:var(--white);padding:.75rem 1.1rem;border-radius:999px;transition:transform .2s,background .2s}
.btn:hover{transform:translateY(-1px);background:var(--soft-green)}
.btn.ghost{background:transparent;color:var(--forest);border:1px solid rgba(39,78,19,.18)}
.btn.ghost:hover{background:rgba(106,168,79,.08)}
.muted{color:var(--muted)}
form{display:grid;gap:1rem}
form label{font-size:.95rem;font-weight:600;color:var(--forest)}
input[type="text"],input[type="email"],input[type="password"],textarea,select{width:100%;padding:1rem;border:1px solid rgba(39,78,19,.14);border-radius:16px;background:#fbfaf4;color:var(--forest);font-size:1rem}
textarea{min-height:160px;resize:vertical}
button{background:var(--forest);color:var(--cream);border:none;padding:1rem 1.2rem;border-radius:999px;font-weight:700;cursor:pointer}
button:hover{background:var(--green)}
.site-footer{background:var(--forest);color:var(--cream);padding:3rem 0;margin-top:3rem}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem}
.footer-grid h3{margin-top:0;color:var(--yellow)}
.footer-grid p, .footer-grid a, .footer-grid li{color:var(--cream);font-size:.95rem}
.footer-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:.75rem}
.footer-grid a:hover{text-decoration:underline}
.footer-bottom{display:flex;justify-content:space-between;gap:1rem;padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.12);font-size:.95rem}
.table-card{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:1rem 0.75rem;text-align:left;border-bottom:1px solid rgba(39,78,19,.12)}
th{color:var(--forest);font-weight:700}
@media(max-width:1100px){.hero{grid-template-columns:1fr}.grid.columns-3,.grid.columns-4{grid-template-columns:repeat(2,minmax(0,1fr))}} 
@media(max-width:900px){.team-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:780px){.footer-grid{grid-template-columns:1fr}.site-nav{order:3;width:100%;display:none}.site-nav.open{display:block}.site-nav ul{flex-direction:column;gap:.5rem}.mobile-toggle{display:inline-flex}.controls{order:2;width:100%;justify-content:flex-end}}
@media(max-width:600px){.team-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;align-items:flex-start}.hero h1{font-size:2.25rem}}
/* dark mode */
:root.dark{background:#081406;color:#e7f1db}
:root.dark body{background:#081406}
:root.dark .site-header{background:#08150f;box-shadow:0 24px 60px rgba(0,0,0,.35)}
:root.dark .site-nav a{color:#e8f3d8}
:root.dark .btn{background:#6aab50;color:#f7f7eb}
:root.dark .btn.ghost{border-color:rgba(255,255,255,.18);color:#e7f1db}
:root.dark .card{background:#0d1c0e;color:#dce6ca;border:1px solid rgba(112,150,102,.18)}
:root.dark input, :root.dark textarea, :root.dark select{background:#12220f;color:#e7f1db;border:1px solid rgba(112,150,102,.2)}
:root.dark .site-footer{background:#0c1a0d}
:root.dark .footer-grid a, :root.dark .footer-grid p, :root.dark .footer-grid li{color:#dce6ca}
:root.dark table, :root.dark th, :root.dark td{border-color:rgba(112,150,102,.2)}