/* ZEYN student tools: shared look (matches oyunlar.html) */
:root{--bg:#ffffff;--card:#fff;--ink:#10284a;--muted:#5b6b82;--line:#e2e7ee;--blue:#1559c9;--blue-2:#f3f6fa;--green:#2e9e5b;--green-2:#e6f6ec;--red:#d64545;--red-2:#fdeaea;--gold:#f4b63f;--gold-2:#fff6dd;--r:18px}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.5;-webkit-text-size-adjust:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
.zt-w{width:min(1080px,100% - 32px);margin:0 auto}
header.zt-h{background:#fff;border-bottom:1px solid var(--line)}
.zt-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px;flex-wrap:wrap}
.zt-nav nav{display:flex;gap:6px;flex-wrap:wrap}
.zt-nav nav a{font-weight:800;color:var(--blue);padding:8px 12px;border-radius:12px;font-size:15px}
.zt-nav nav a.on,.zt-nav nav a:hover{background:var(--blue-2)}
.zt-logo img{display:block;height:40px;width:auto}
main{padding:22px 0 60px}
h1{font-size:clamp(26px,5vw,38px);line-height:1.15;margin:6px 0 8px;letter-spacing:-.5px}
h2{font-size:22px;margin:0 0 10px;line-height:1.25}
h3{font-size:18px;margin:0 0 6px}
.lead{color:var(--muted);font-size:17px;max-width:720px;margin:0 0 18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:14px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.muted{color:var(--muted)} .small{font-size:13px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:10px;padding:12px 18px;font-weight:700;cursor:pointer;background:var(--ink);color:#fff;font-size:16px;min-height:46px;text-align:center}
.btn:hover{filter:brightness(1.06)} .btn:disabled{opacity:.5;cursor:default}
.btn.green{background:var(--ink)} .btn.gold{background:#fff;color:var(--ink);border:1.5px solid var(--ink)} .btn.ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line)} .btn.red{background:var(--red-2);color:var(--red)}
.btn.wa{background:#25d366;color:#05371b}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
label{display:block;font-weight:800;font-size:14px;margin:10px 0 4px}
input[type=text],input[type=number],input:not([type]),select,textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:11px 12px;background:#fff;font-size:16px}
input:focus,select:focus,textarea:focus,.btn:focus-visible{outline:3px solid rgba(18,108,243,.35);outline-offset:1px}
.pill{display:inline-block;border-radius:0;padding:0;font-size:14px;font-weight:600;background:none;color:var(--muted)}
.pill.green,.pill.gold,.pill.red{background:none;color:var(--muted)}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums}
.tbl{overflow-x:auto;-webkit-overflow-scrolling:touch}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 12px}
.tabs button{border:1.5px solid var(--line);background:#fff;border-radius:12px;padding:9px 14px;font-weight:800;cursor:pointer}
.tabs button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.zt-toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);opacity:0;background:#082c5d;color:#fff;padding:12px 18px;border-radius:14px;font-weight:700;z-index:9999;transition:.25s;max-width:calc(100% - 32px)}
.zt-toast.on{opacity:1;transform:translate(-50%,0)}
.empty{color:var(--muted);text-align:center;padding:18px}
.need-login{background:var(--blue-2);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
@media (max-width:560px){.card{padding:16px}.btn{width:100%}.row .btn{flex:1 1 auto}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}