/* ===== VIETITPRO — Bộ công cụ test laptop (dùng chung cho mọi trang /tools/) ===== */
:root{
  --bg:#0d1520; --bg2:#141f2e; --card:#182636; --line:#24384f;
  --pri:#2f8fff; --pri2:#0b5fa5; --gold:#f5a400;
  --ok:#22c55e; --bad:#ef4444; --txt:#e8f0fa; --mut:#8ea4bd;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--txt);font:16px/1.6 'Segoe UI',Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--pri);text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}

/* header */
.top{background:linear-gradient(135deg,#083f70,#0b5fa5);padding:14px 0;position:sticky;top:0;z-index:50;box-shadow:0 4px 20px rgba(0,0,0,.35)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand{font-weight:800;font-size:20px;color:#fff;letter-spacing:.5px}
.brand span{color:var(--gold)}
.top nav{display:flex;gap:8px;flex-wrap:wrap}
.top nav a{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:#fff;padding:7px 14px;border-radius:999px;font-size:14px;font-weight:600}
.top nav a:hover{background:rgba(255,255,255,.24)}

/* breadcrumb */
.crumb{padding:14px 0 0;font-size:13.5px;color:var(--mut)}
.crumb a{color:var(--mut)}
.crumb a:hover{color:var(--pri)}

/* hero */
.hero{text-align:center;padding:34px 0 24px}
.hero h1{font-size:29px;font-weight:800;margin-bottom:10px}
.hero p{color:var(--mut);max-width:700px;margin:0 auto}
.phead{padding:22px 0 18px}
.phead h1{font-size:25px;font-weight:800;margin-bottom:8px}
.phead p{color:var(--mut);font-size:15px}

/* grid công cụ */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;padding-bottom:44px}
.tool{display:block;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;transition:transform .15s,border-color .15s,box-shadow .15s;color:var(--txt)}
.tool:hover{transform:translateY(-3px);border-color:var(--pri);box-shadow:0 12px 30px rgba(47,143,255,.18)}
.tool .ic{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--pri),var(--pri2));display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:12px}
.tool h3{font-size:17px;margin-bottom:6px}
.tool p{font-size:13.5px;color:var(--mut);line-height:1.5}

/* thành phần chung */
.btn{background:var(--pri);color:#fff;border:0;padding:9px 16px;border-radius:9px;font-weight:600;cursor:pointer;font-size:14px}
.btn:hover{background:#1c7ae8}
.btn.g{background:#31465f}.btn.g:hover{background:#3d5877}
.btn.r{background:var(--bad)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.hint{background:rgba(245,164,0,.1);border-left:4px solid var(--gold);padding:11px 14px;border-radius:0 9px 9px 0;color:#ffd98a;font-size:14px;margin-bottom:18px}
.row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:14px}
.box h4{margin-bottom:10px;color:var(--gold);font-size:15px}
.box p{font-size:14px;color:var(--mut)}
canvas{max-width:100%;border-radius:10px;background:#0a1119;display:block}
video{max-width:100%;border-radius:12px;background:#000}
table{width:100%;border-collapse:collapse;font-size:14.5px}
td{padding:9px 6px;border-bottom:1px solid var(--line)}
td:first-child{color:var(--mut);width:44%}
td:last-child{font-weight:600}
.led{display:inline-block;width:10px;height:10px;border-radius:50%;background:#3b5675;margin-right:7px}
.led.on{background:var(--ok);box-shadow:0 0 8px var(--ok)}

/* bàn phím */
.kbd{display:flex;flex-direction:column;gap:6px;align-items:center;user-select:none}
.krow{display:flex;gap:6px}
.k{min-width:44px;height:44px;padding:0 8px;border:1px solid #3b5675;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:12px;color:#c7d8ec;background:#16283c;transition:.06s}
.k.hit{background:var(--ok);border-color:var(--ok);color:#04220f;font-weight:700}
.k.now{background:var(--gold);border-color:var(--gold);color:#3a2600;transform:scale(.94)}
.kstat{text-align:center;margin:16px 0;color:var(--mut);font-size:14px}
.kstat b{color:var(--ok);font-size:20px}

/* màn hình */
#scr{position:fixed;inset:0;z-index:200;display:none;cursor:pointer}
#scr.on{display:block}
#scrTip{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:rgba(0,0,0,.75);color:#fff;padding:9px 18px;border-radius:999px;font-size:14px;pointer-events:none}

/* touchpad / cảm ứng */
.pad{height:230px;background:#16283c;border:2px dashed #3b5675;border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--mut);position:relative;overflow:hidden;touch-action:none}
.dot{position:absolute;width:34px;height:34px;border-radius:50%;background:var(--gold);transform:translate(-50%,-50%);pointer-events:none;opacity:.85}

/* điều hướng cuối trang */
.other{border-top:1px solid var(--line);margin-top:30px;padding-top:22px}
.other h4{font-size:15px;color:var(--mut);margin-bottom:12px}
.other .list{display:flex;gap:9px;flex-wrap:wrap}
.other .list a{background:var(--card);border:1px solid var(--line);padding:8px 14px;border-radius:999px;font-size:13.5px;color:var(--txt)}
.other .list a:hover{border-color:var(--pri);color:var(--pri)}

.cta{background:linear-gradient(135deg,#083f70,#0b5fa5);border-radius:16px;padding:22px;margin:28px 0;text-align:center}
.cta h4{color:#fff;font-size:18px;margin-bottom:8px}
.cta p{color:#cfe3fa;font-size:14.5px;margin-bottom:14px}
.cta a{display:inline-block;background:var(--gold);color:#3a2600;font-weight:700;padding:10px 22px;border-radius:999px}

.foot{border-top:1px solid var(--line);padding:26px 0;text-align:center;color:var(--mut);font-size:14px}
.foot b{color:var(--txt)}
@media(max-width:640px){
  .hero h1{font-size:23px}.phead h1{font-size:21px}
  .k{min-width:34px;height:38px;font-size:10px}
}