/* =====================================================================
   Liquid Glass UI — glassmorphism theme
   Cùng bộ class cũ nên mọi view giữ nguyên.
   ===================================================================== */
:root{
  --brand:#7aa2ff; --brand2:#b98cff; --brand3:#63e6e2;
  --ok:#4ade80; --warn:#fbbf24; --err:#ff6b6b;

  --text:#eaf0fb; --muted:#9aa7bd;
  --radius:20px; --radius-sm:13px;

  /* glass tokens */
  --glass:rgba(255,255,255,.10);
  --glass-strong:rgba(255,255,255,.16);
  --glass-brd:rgba(255,255,255,.22);
  --glass-hi:rgba(255,255,255,.5);
  --shadow:0 8px 32px rgba(0,0,0,.37);
  --blur:26px;
}
:root[data-theme="light"]{
  --text:#182031; --muted:#5a6478;
  --glass:rgba(255,255,255,.55);
  --glass-strong:rgba(255,255,255,.72);
  --glass-brd:rgba(255,255,255,.7);
  --glass-hi:rgba(255,255,255,.9);
  --shadow:0 8px 30px rgba(60,80,140,.16);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  color:var(--text);
  font:15px/1.55 'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;
  min-height:100vh; display:flex; flex-direction:column;
  background:#070912; position:relative; overflow-x:hidden;
}
:root[data-theme="light"] body{background:#dfe6f5}
/* Blobs màu chuyển động phía sau lớp kính */
body::before,body::after{
  content:""; position:fixed; z-index:-2; border-radius:50%;
  filter:blur(90px); opacity:.55; pointer-events:none;
  animation:float 18s ease-in-out infinite;
}
body::before{width:52vw;height:52vw;top:-16vw;left:8vw;opacity:.7;
  background:radial-gradient(circle at 30% 30%,#6d8bff,#9a3bff 70%)}
body::after{width:46vw;height:46vw;bottom:-14vw;right:-6vw;
  background:radial-gradient(circle at 60% 40%,#2fd3c9,#8a5bff 70%);animation-delay:-9s}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(4vw,3vw) scale(1.12)}}
@media(prefers-reduced-motion:reduce){body::before,body::after{animation:none}}

a{color:var(--brand); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{width:100%; max-width:1120px; margin:0 auto; padding:0 20px}
.lg-svg{position:absolute; width:0; height:0; pointer-events:none; overflow:hidden}

/* ---- glass mixin cơ bản ---- */
.card,.topbar,.topbar-slim,.sidebar,.langsw,.btn,.tablewrap,.flash,.feature,.pill,.token-reveal,.qrimg{
  -webkit-backdrop-filter:blur(var(--blur)) saturate(160%);
  backdrop-filter:blur(var(--blur)) saturate(160%);
}

/* ---- topbar (1 hàng, liquid glass) ---- */
.topbar{position:sticky; top:0; z-index:20;
  background:var(--glass); border-bottom:1px solid var(--glass-brd);
  -webkit-backdrop-filter:blur(28px) saturate(200%); backdrop-filter:blur(28px) saturate(200%);
  box-shadow:0 1px 0 var(--glass-hi) inset, 0 6px 24px rgba(0,0,0,.28)}
.topbar .wrap{display:flex; align-items:center; gap:14px; height:66px;
  max-width:1500px; flex-wrap:nowrap}
.brand{font-weight:800; font-size:17px; color:var(--text); display:flex; align-items:center; gap:8px;
  letter-spacing:.3px; white-space:nowrap; flex:0 0 auto}
.brand:hover{text-decoration:none}
.logo{background:linear-gradient(135deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
/* nav vuốt ngang được (cuộn mượt kiểu iOS), fade 2 mép báo còn nội dung */
.mainnav{display:flex; gap:4px; margin-left:2px; flex:1 1 auto; min-width:0;
  overflow-x:auto; overscroll-behavior-x:contain; -webkit-overflow-scrolling:touch;
  scroll-snap-type:x proximity; scrollbar-width:none; -ms-overflow-style:none;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 20px,#000 calc(100% - 20px),transparent);
  mask-image:linear-gradient(90deg,transparent,#000 20px,#000 calc(100% - 20px),transparent)}
.mainnav::-webkit-scrollbar{display:none}
.mainnav a{color:var(--muted); padding:8px 13px; border-radius:12px; font-weight:600; transition:.18s;
  white-space:nowrap; flex:0 0 auto; scroll-snap-align:start}
.mainnav a:hover{color:var(--text); background:var(--glass-strong); text-decoration:none;
  box-shadow:0 1px 0 var(--glass-hi) inset}
.mainnav a:active{transform:scale(.95)}
.topright{margin-left:auto; display:flex; align-items:center; gap:10px; flex:0 0 auto}
.langsw{display:flex; border:1px solid var(--glass-brd); border-radius:999px; overflow:hidden;
  background:var(--glass); box-shadow:0 1px 0 var(--glass-hi) inset}
.langsw a{padding:6px 12px; color:var(--muted); font-size:13px; font-weight:700; white-space:nowrap}
.langsw a.on{background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff}
.langsw a:hover{text-decoration:none}
.usermenu{display:flex; align-items:center; gap:9px; flex:0 0 auto}
.avatar{width:32px; height:32px; border-radius:50%; border:1.5px solid var(--glass-hi); flex:0 0 auto}
.uname{font-weight:700; font-size:14px; white-space:nowrap}
.admin-btn{border-color:rgba(251,191,36,.5); color:var(--warn)}
/* màn nhỏ: ẩn bớt để nav luôn hiện & vuốt được (không ẩn nav) */
@media(max-width:1180px){.uname{display:none}}
@media(max-width:1050px){.mainnav a{padding:8px 11px; font-size:13.5px}}
@media(max-width:640px){.brand span:not(.logo){display:none} .langsw a{padding:6px 10px}}

/* ---- page ---- */
.page{flex:1; padding:38px 20px 70px}
h1{font-size:28px; margin:0 0 4px; letter-spacing:-.3px}
h2{font-size:19px; margin:0 0 14px}
.sub{color:var(--muted); margin:0 0 26px}
.grid{display:grid; gap:18px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:760px){.grid.cols-3,.grid.cols-2{grid-template-columns:1fr}}

/* ---- glass card ---- */
.card{
  position:relative; background:var(--glass); border:1px solid var(--glass-brd);
  border-radius:var(--radius); padding:22px; box-shadow:var(--shadow); overflow:hidden;
}
/* highlight bóng kính phía trên */
.card::before{content:""; position:absolute; inset:0 0 auto 0; height:1px;
  background:linear-gradient(90deg,transparent,var(--glass-hi),transparent); opacity:.7}
.card h2{margin-top:0}
.stat{display:flex; flex-direction:column; gap:6px}
.stat .n{font-size:30px; font-weight:800; letter-spacing:.3px}
.stat .l{color:var(--muted); font-size:12px; text-transform:uppercase; letter-spacing:.7px}

/* ---- buttons ---- */
.btn{display:inline-flex; align-items:center; gap:8px; white-space:nowrap;
  border:1px solid var(--glass-brd); background:var(--glass-strong); color:var(--text);
  padding:10px 17px; border-radius:12px; font-weight:700; cursor:pointer; font-size:14px;
  transition:.16s; box-shadow:0 1px 0 var(--glass-hi) inset, 0 2px 10px rgba(0,0,0,.12)}
.btn:hover{text-decoration:none; transform:translateY(-1.5px); box-shadow:0 8px 22px rgba(0,0,0,.22)}
.btn:active{transform:translateY(0)}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2)); border:none; color:#fff;
  box-shadow:0 6px 22px rgba(122,110,255,.45)}
.btn.ok{background:linear-gradient(135deg,#34d399,#4ade80); border:none; color:#04210f}
.btn.danger{background:var(--glass); border-color:rgba(255,107,107,.55); color:var(--err)}
.btn.ghost{background:var(--glass)}
.btn.tiny{padding:6px 12px; font-size:13px; border-radius:10px}
.btn.block{width:100%; justify-content:center}
.btn:disabled{opacity:.5; cursor:not-allowed}

/* ---- forms ---- */
label{display:block; font-weight:700; margin:14px 0 6px; font-size:14px}
input[type=text],input[type=number],input[type=search],select{
  width:100%; background:var(--glass); border:1px solid var(--glass-brd); color:var(--text);
  padding:12px 14px; border-radius:12px; font-size:15px; transition:.16s;
  -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px)}
input::placeholder{color:var(--muted)}
input:focus,select:focus{outline:none; border-color:var(--brand); box-shadow:0 0 0 3px rgba(122,162,255,.22)}
select option{color:#111}
.checkbox{display:flex; align-items:center; gap:9px; margin-top:14px}
.checkbox input{width:18px; height:18px; accent-color:var(--brand)}
.hint{color:var(--muted); font-size:13px; margin-top:6px}

/* ---- table ---- */
table{width:100%; border-collapse:collapse; font-size:14px}
.tablewrap{overflow-x:auto; border:1px solid var(--glass-brd); border-radius:var(--radius-sm); background:var(--glass)}
th,td{padding:12px 14px; text-align:left; border-bottom:1px solid var(--glass-brd); white-space:nowrap}
th{color:var(--muted); font-size:11.5px; text-transform:uppercase; letter-spacing:.6px; background:var(--glass-strong)}
tr:last-child td{border-bottom:none}
tbody tr{transition:.14s}
tbody tr:hover{background:var(--glass-strong)}
code,.mono,.keycell{font-family:ui-monospace,Menlo,Consolas,monospace}
.keycell{font-size:13px}

/* ---- badges / pills ---- */
.badge{display:inline-block; padding:3px 11px; border-radius:999px; font-size:12px; font-weight:800}
.badge.ok{background:rgba(74,222,128,.16); color:var(--ok); border:1px solid rgba(74,222,128,.35)}
.badge.warn{background:rgba(251,191,36,.16); color:var(--warn); border:1px solid rgba(251,191,36,.35)}
.badge.muted{background:rgba(154,167,189,.16); color:var(--muted); border:1px solid var(--glass-brd)}
.badge.err{background:rgba(255,107,107,.16); color:var(--err); border:1px solid rgba(255,107,107,.35)}
.pill{font-size:12px; padding:3px 10px; border-radius:999px; background:var(--glass);
  border:1px solid var(--glass-brd); color:var(--muted); font-weight:700}
.pill.seller{color:var(--brand2); border-color:rgba(185,140,255,.5)}
.pill.admin{color:var(--warn); border-color:rgba(251,191,36,.5)}

/* ---- flash ---- */
.flash{padding:13px 17px; border-radius:14px; margin-bottom:16px; border:1px solid var(--glass-brd);
  font-weight:600; background:var(--glass)}
.flash.success{background:rgba(74,222,128,.14); border-color:rgba(74,222,128,.45)}
.flash.error{background:rgba(255,107,107,.14); border-color:rgba(255,107,107,.45)}
.flash.info{background:rgba(122,162,255,.14); border-color:rgba(122,162,255,.45)}

/* ---- hero ---- */
.hero{text-align:center; padding:80px 20px}
.hero h1{font-size:48px; line-height:1.05; margin-bottom:14px;
  background:linear-gradient(135deg,#fff 10%,var(--brand) 55%,var(--brand2));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent}
:root[data-theme="light"] .hero h1{background:linear-gradient(135deg,#1a2440,var(--brand2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{color:var(--muted); font-size:18px; max-width:580px; margin:0 auto 30px}
.hero .btn{font-size:16px; padding:14px 30px}
.features{display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-top:56px; text-align:left}
@media(max-width:760px){.features{grid-template-columns:1fr}.hero h1{font-size:34px}}
.feature{background:var(--glass); border:1px solid var(--glass-brd); border-radius:var(--radius);
  padding:24px; box-shadow:var(--shadow); position:relative; overflow:hidden}
.feature::before{content:""; position:absolute; inset:0 0 auto 0; height:1px;
  background:linear-gradient(90deg,transparent,var(--glass-hi),transparent)}
.feature .ic{font-size:28px; margin-bottom:10px}

/* ---- qr / invoice ---- */
.qrbox{display:flex; gap:28px; flex-wrap:wrap; align-items:flex-start}
.qrimg{background:#fff; padding:14px; border-radius:var(--radius); width:288px; height:288px;
  display:flex; align-items:center; justify-content:center; box-shadow:0 10px 34px rgba(0,0,0,.3)}
.qrimg img{max-width:100%; max-height:100%}
.kv{display:flex; justify-content:space-between; gap:20px; padding:10px 0; border-bottom:1px solid var(--glass-brd)}
.kv .k{color:var(--muted)}
.kv .v{font-weight:800}
.amount-big{font-size:30px; font-weight:800; color:var(--ok)}
.token-reveal{background:var(--glass); border:1px dashed rgba(122,162,255,.6); border-radius:12px;
  padding:14px; word-break:break-all; font-family:ui-monospace,monospace; margin:10px 0}
.row-actions{display:flex; gap:8px; flex-wrap:wrap}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:var(--brand);
  border-radius:50%;display:inline-block;animation:spin .7s linear infinite;vertical-align:-3px}
@keyframes spin{to{transform:rotate(360deg)}}

/* Đếm ngược cooldown reset HWID: vòng xoay vàng + thời gian */
.countdown{display:inline-flex; align-items:center; gap:8px}
.cd-spin{width:15px; height:15px; border-radius:50%; flex:0 0 auto;
  border:2.5px solid rgba(251,191,36,.25); border-top-color:var(--warn);
  animation:spin .8s linear infinite;
  box-shadow:0 0 8px rgba(251,191,36,.45)}
.cd-time{color:var(--warn); font-weight:800; font-variant-numeric:tabular-nums; letter-spacing:.5px}

/* ---- footer ---- */
.foot{border-top:1px solid var(--glass-brd); padding:22px 0; color:var(--muted); font-size:13px;
  background:var(--glass); -webkit-backdrop-filter:blur(var(--blur)); backdrop-filter:blur(var(--blur))}
.foot .wrap{display:flex; justify-content:space-between}

/* =====================================================================
   Refraction "uốn kính" (liquid glass) — progressive enhancement.
   Đặt CUỐI FILE để thắng mọi rule backdrop-filter phía trên.
   • Chromium (Chrome/Edge/Android Chrome): áp SVG displacement -> khúc xạ thật.
   • Safari iOS/Mac & Firefox: bỏ qua url(), giữ nguyên frosted blur.
   ===================================================================== */
@supports (backdrop-filter: blur(1px) url("#lg-distort")) or (-webkit-backdrop-filter: blur(1px) url("#lg-distort")){
  .card, .feature{
    -webkit-backdrop-filter:blur(var(--blur)) saturate(180%) url("#lg-distort");
    backdrop-filter:blur(var(--blur)) saturate(180%) url("#lg-distort");
  }
  .topbar{
    -webkit-backdrop-filter:blur(28px) saturate(200%) url("#lg-distort");
    backdrop-filter:blur(28px) saturate(200%) url("#lg-distort");
  }
  .foot{
    -webkit-backdrop-filter:blur(var(--blur)) url("#lg-distort");
    backdrop-filter:blur(var(--blur)) url("#lg-distort");
  }
}
@media (prefers-reduced-motion: reduce){ /* không animate filter, giữ tĩnh */ }

/* =====================================================================
   MENU DẠNG SIDEBAR (bố cục khi đã đăng nhập)
   ===================================================================== */
.layout{min-height:100vh}
.sidebar{position:fixed; inset:0 auto 0 0; width:254px; z-index:40;
  display:flex; flex-direction:column; padding:18px 14px;
  background:var(--glass); border-right:1px solid var(--glass-brd);
  box-shadow:1px 0 0 var(--glass-hi) inset}
.side-brand{display:flex; align-items:center; gap:9px; font-weight:800; font-size:17px;
  color:var(--text); padding:6px 10px 16px; letter-spacing:.3px}
.side-brand:hover{text-decoration:none}
.side-brand .logo{background:linear-gradient(135deg,var(--brand),var(--brand2));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; font-size:20px}

.sidemenu{display:flex; flex-direction:column; gap:3px; flex:1 1 auto; overflow-y:auto; min-height:0}
.sidemenu a{display:flex; align-items:center; gap:12px; padding:11px 12px; border-radius:12px;
  color:var(--muted); font-weight:600; transition:.15s; border:1px solid transparent}
.sidemenu a .ic{flex:0 0 auto; opacity:.85}
.sidemenu a:hover{background:var(--glass-strong); color:var(--text); text-decoration:none}
.sidemenu a.active{color:#fff; border-color:var(--glass-brd);
  background:linear-gradient(135deg,rgba(122,162,255,.30),rgba(185,140,255,.24));
  box-shadow:0 1px 0 var(--glass-hi) inset, 0 6px 18px rgba(122,110,255,.25)}
.sidemenu a.active .ic{opacity:1}
.sidemenu a.admin.active{background:linear-gradient(135deg,rgba(251,191,36,.28),rgba(251,146,60,.22))}
.side-sep{font-size:11px; text-transform:uppercase; letter-spacing:.7px; color:var(--muted);
  padding:16px 12px 6px; opacity:.7}

.side-foot{margin-top:12px; display:flex; flex-direction:column; gap:12px;
  padding-top:14px; border-top:1px solid var(--glass-brd)}
.side-foot .langsw{align-self:flex-start}
.side-user{display:flex; align-items:center; gap:10px}
.side-user .avatar{width:38px; height:38px}
.su-meta{display:flex; flex-direction:column; line-height:1.25; min-width:0; flex:1}
.su-meta .uname{font-size:14px; font-weight:700; white-space:nowrap; overflow:hidden; text-overflow:ellipsis}
.su-role{font-size:12px; color:var(--muted)}
.su-logout{display:inline-flex; align-items:center; justify-content:center; width:38px; height:38px;
  border-radius:11px; border:1px solid var(--glass-brd); color:var(--muted); background:var(--glass); flex:0 0 auto}
.su-logout:hover{color:var(--err); border-color:rgba(255,107,107,.5); text-decoration:none}

/* vùng nội dung */
.content{margin-left:254px; display:flex; flex-direction:column; min-height:100vh}
.topbar-slim{position:sticky; top:0; z-index:20; display:flex; align-items:center; gap:14px;
  height:60px; padding:0 22px; background:var(--glass); border-bottom:1px solid var(--glass-brd);
  box-shadow:0 1px 0 var(--glass-hi) inset}
.topbar-slim .page-title{font-weight:800; font-size:16px; letter-spacing:-.2px}
.hamb{display:none; flex-direction:column; gap:4px; width:42px; height:38px; border-radius:11px;
  border:1px solid var(--glass-brd); background:var(--glass); cursor:pointer; align-items:center; justify-content:center}
.hamb span{width:18px; height:2px; background:var(--text); border-radius:2px; transition:.2s}
.drawer-backdrop{display:none; position:fixed; inset:0; z-index:35; background:rgba(0,0,0,.5);
  -webkit-backdrop-filter:blur(3px); backdrop-filter:blur(3px)}
.has-sidebar .page{padding-top:30px}

/* mobile: sidebar thành drawer trượt, mở bằng nút hamburger */
@media(max-width:900px){
  .sidebar{transform:translateX(-100%); transition:transform .26s ease; width:270px; box-shadow:var(--shadow)}
  body.nav-open .sidebar{transform:translateX(0)}
  body.nav-open .drawer-backdrop{display:block}
  .content{margin-left:0}
  .hamb{display:flex}
}

/* refraction cho sidebar/topbar-slim (Chromium; khác thì frosted) */
@supports (backdrop-filter: blur(1px) url("#lg-distort")) or (-webkit-backdrop-filter: blur(1px) url("#lg-distort")){
  .sidebar, .topbar-slim{
    -webkit-backdrop-filter:blur(var(--blur)) saturate(180%) url("#lg-distort");
    backdrop-filter:blur(var(--blur)) saturate(180%) url("#lg-distort");
  }
}