/* RadarAI — hệ thống thiết kế v4 (nền tối, HUD).
   Nguồn: docs/Thiết kế platform chuyên nghiệp/design_handoff_radarai/README.md
   Nguyên tắc: bo góc 0 ở mọi nơi (trừ chấm/vòng radar), không đổ bóng ngoài — chỉ glow. */

:root{
  --bg:#05070a; --bg2:#070a0f;
  --card:rgba(255,255,255,.03); --card2:rgba(255,255,255,.025);
  --fg:#eef1f5; --fg2:#a5aebb; --fg3:#8b96a5; --fg4:#5c6673;
  --blue:#5b9bea; --blue-d:#2a78d6; --blue-dk:#2e4d75; --blue-dkr:#1c3560;
  --red:#e5484d; --amber:#e0a534; --green:#4cc38a;
  --line:rgba(91,155,234,.22); --line-2:rgba(91,155,234,.3); --line-3:rgba(255,255,255,.06);
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --disp:Archivo,'Arial Narrow',system-ui,sans-serif;
  --body:'Be Vietnam Pro',system-ui,-apple-system,sans-serif;
  --wrap:1240px; --gap-sec:clamp(80px,10vw,140px);
}

html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);
  font-family:var(--body);-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}
/* Thuộc tính hidden phải THẮNG các class có display riêng (.app, .btn, .toolbar).
   Không có dòng này thì <div class="app" hidden> vẫn hiện vì .app{display:flex}
   đè lên display:none mặc định của trình duyệt. */
[hidden]{display:none!important}
a{color:var(--blue);text-decoration:none}
a:hover{color:#9cc3f5}
input,select,textarea{font-family:inherit}
input::placeholder{color:var(--fg4)}
input:focus,select:focus,textarea:focus{outline:none}
button{font-family:inherit;cursor:pointer}
button:disabled{cursor:default;opacity:.75}
img{max-width:100%}

/* ---------- chuyển động ---------- */
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
@keyframes sweep{from{transform:rotate(0)}to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{opacity:.25}50%{opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@keyframes scanline{from{top:-10%}to{top:110%}}
@keyframes ringpulse{0%{transform:scale(.6);opacity:.6}100%{transform:scale(1.6);opacity:0}}
[data-reveal]{opacity:0;transform:translateY(28px);
  transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
[data-reveal="in"]{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none}
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important}
}

/* ---------- chữ ---------- */
.mono{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--fg4)}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--blue);display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--blue);flex:none}
.label{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--fg3)}
.label.b{color:var(--blue)}
h1,h2,h3{font-family:var(--disp);font-weight:800;letter-spacing:-.04em;margin:0;line-height:1}
.h-hero{font-variation-settings:'wdth' 90;font-size:clamp(30px,4.4vw,62px);line-height:1;
  letter-spacing:-.04em;text-wrap:balance}
.h-sec{font-size:clamp(32px,4.5vw,64px)}
.h-app{font-size:clamp(24px,3vw,34px);letter-spacing:-.03em}
.h-sub{font-size:clamp(26px,3.2vw,40px);line-height:1.1;letter-spacing:-.035em;text-wrap:balance}
.lead{font-size:16px;line-height:1.65;color:var(--fg2);margin:0;text-wrap:pretty}
.small{font-size:13px;color:var(--fg3)}
.blue{color:var(--blue)}
.red{color:var(--red)}

/* ---------- bố cục ---------- */
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px;width:100%}
.sec{padding:var(--gap-sec) 24px 0}
.grid{display:grid;gap:6px}
.auto-220{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.auto-260{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.auto-280{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.auto-300{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}

/* ---------- khung HUD ---------- */
.hud{position:fixed;inset:14px;pointer-events:none;z-index:50;opacity:.55}
.hud i{position:absolute;width:22px;height:22px}
.hud i:nth-child(1){left:0;top:0;border-left:1px solid var(--blue);border-top:1px solid var(--blue)}
.hud i:nth-child(2){right:0;top:0;border-right:1px solid var(--blue);border-top:1px solid var(--blue)}
.hud i:nth-child(3){left:0;bottom:0;border-left:1px solid var(--blue);border-bottom:1px solid var(--blue)}
.hud i:nth-child(4){right:0;bottom:0;border-right:1px solid var(--blue);border-bottom:1px solid var(--blue)}
.corners{position:relative}
.corners>u{position:absolute;width:18px;height:18px;z-index:2}
.corners>u:nth-of-type(1){left:-1px;top:-1px;border-left:1.5px solid var(--blue);border-top:1.5px solid var(--blue)}
.corners>u:nth-of-type(2){right:-1px;top:-1px;border-right:1.5px solid var(--blue);border-top:1.5px solid var(--blue)}
.corners>u:nth-of-type(3){left:-1px;bottom:-1px;border-left:1.5px solid var(--blue);border-bottom:1.5px solid var(--blue)}
.corners>u:nth-of-type(4){right:-1px;bottom:-1px;border-right:1.5px solid var(--blue);border-bottom:1.5px solid var(--blue)}

/* ---------- thẻ & nút ---------- */
.card{border:1px solid var(--line-2);padding:24px}
.card.light{background:var(--fg);color:var(--bg);border:0}
.card.solid{background:var(--blue);color:var(--bg);border:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;
  background:var(--blue-d);color:#fff;font-family:var(--disp);font-weight:800;font-size:17px;
  letter-spacing:-.01em;padding:14px 24px;text-align:center}
.btn:hover{background:#3a8ae6;color:#fff}
.btn.light{background:var(--fg);color:var(--bg);font-family:var(--body);font-weight:600;font-size:15px;padding:13px 22px}
.btn.light:hover{background:#fff;color:var(--bg)}
.btn.dark{background:var(--bg);color:#fff;font-family:var(--body);font-weight:600;font-size:15px;padding:13px 22px}
.btn.line{background:transparent;border:1px solid var(--fg);color:var(--fg);
  font-family:var(--body);font-weight:600;font-size:15px;padding:13px 22px}
.btn.line:hover{background:rgba(255,255,255,.06);color:var(--fg)}
.btn.mono-btn{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  padding:10px 16px;background:transparent;border:1px solid var(--blue);color:var(--fg);font-weight:400}
.btn.mono-btn:hover{background:rgba(91,155,234,.12);color:var(--fg)}
.btn:disabled{background:var(--blue-dk)}

/* ---------- dữ liệu ---------- */
.bar-track{height:10px;background:rgba(255,255,255,.05);overflow:hidden}
.bar-fill{height:100%;background:var(--blue);box-shadow:0 0 8px var(--blue)}
.progress{height:2px;background:rgba(255,255,255,.08)}
.progress>span{display:block;height:100%;background:var(--blue);box-shadow:0 0 12px var(--blue);
  transition:width .6s ease}
.quote{margin:0;padding-left:16px;border-left:1px solid var(--blue);font-size:15px;line-height:1.6;color:#d5dbe3}
.quote .src{margin-top:8px;font-size:12px;color:var(--fg3)}
table{border-collapse:collapse;width:100%}
.err{border:1px solid var(--red);color:#ffb4b6;background:rgba(229,72,77,.08);padding:12px 14px;font-size:14px}
.ok{color:var(--green)}
.tag{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid var(--blue);color:var(--blue);padding:2px 6px;display:inline-block}
.tag.fill{background:var(--blue-d);border-color:var(--blue-d);color:#fff;padding:5px 9px}

/* ---------- khung ứng dụng (dashboard / admin) ---------- */
.app{display:flex;min-height:100vh;align-items:stretch}
.side{width:232px;flex:none;border-right:1px solid var(--line);padding:28px 0;
  display:flex;flex-direction:column;gap:28px}
.side .brandmark{padding:0 22px;display:flex;align-items:center;gap:10px;
  font-family:var(--disp);font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--fg)}
.side nav{display:flex;flex-direction:column}
.side nav a{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--fg3);padding:11px 22px;display:flex;justify-content:space-between;gap:10px;align-items:center}
.side nav a:hover{color:var(--fg);background:rgba(91,155,234,.07)}
.side nav a[aria-current]{background:rgba(91,155,234,.14);color:var(--fg);
  box-shadow:inset 2px 0 0 var(--blue)}
.main{flex:1 1 600px;min-width:0;padding:28px clamp(20px,3vw,40px) 64px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:6px;margin:22px 0}
.kpi{border:1px solid var(--line);padding:18px}
.kpi .n{font-family:var(--disp);font-size:34px;font-weight:800;letter-spacing:-.04em;line-height:1;margin-top:8px}
.tbl-wrap{overflow-x:auto;border:1px solid var(--line)}
.tbl-head,.tbl-row{display:grid;gap:12px;align-items:center;padding:12px 16px}
.tbl-head{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--fg4);border-bottom:1px solid var(--line)}
.tbl-row{border-bottom:1px solid rgba(255,255,255,.06);font-size:14px}
.tbl-row:last-child{border-bottom:0}
.tbl-row.click{cursor:pointer}
.tbl-row.click:hover{background:rgba(91,155,234,.07)}

@media (max-width:900px){
  .app{flex-direction:column}
  .side{width:auto;border-right:0;border-bottom:1px solid var(--line);
    flex-direction:row;flex-wrap:wrap;align-items:center;gap:14px;padding:16px 0}
  .side nav{flex-direction:row;flex-wrap:wrap}
  .side nav a[aria-current]{box-shadow:inset 0 -2px 0 var(--blue)}
}