:root{
  color-scheme: dark;
  --bg: #020617;

  --cyan: 56 189 248;
  --indigo: 99 102 241;
  --pink: 244 114 182;
  --green: 34 197 94;
  --amber: 245 158 11;
  --red: 248 113 113;
}

body{ background: var(--bg); overflow-x:hidden; }

/* ===== nền dày đặc ===== */
.bg-art{
  position: fixed;
  inset: 0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 12% 10%, rgba(var(--indigo), .28), transparent 60%),
    radial-gradient(900px 520px at 88% 18%, rgba(var(--cyan), .24), transparent 55%),
    radial-gradient(950px 680px at 50% 110%, rgba(var(--pink), .20), transparent 62%),
    radial-gradient(700px 420px at 35% 55%, rgba(var(--cyan), .11), transparent 62%),
    radial-gradient(700px 500px at 70% 65%, rgba(var(--indigo), .12), transparent 62%),
    linear-gradient(180deg, rgba(2,6,23,1), rgba(2,6,23,1));
  filter: saturate(1.30) contrast(1.07);
  animation: bgBreath 7s ease-in-out infinite alternate;
}
@keyframes bgBreath{ from{ transform: scale(1); } to{ transform: scale(1.02); } }

.grid-floor{
  position: fixed;
  inset: -45vh -25vw;
  pointer-events:none;
  transform: perspective(900px) rotateX(70deg) translateY(25vh);
  transform-origin: center;
  opacity: .42;
  background:
    linear-gradient(to right, rgba(var(--cyan), .16) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(to bottom, rgba(var(--cyan), .10) 1px, transparent 1px) 0 0 / 42px 42px,
    radial-gradient(closest-side, rgba(var(--cyan), .22), transparent 70%) 50% 30% / 1000px 1000px no-repeat;
  mask-image: radial-gradient(circle at 50% 35%, rgba(0,0,0,1), rgba(0,0,0,.25) 55%, rgba(0,0,0,0) 75%);
  animation: gridMove 1.6s linear infinite;
  filter: drop-shadow(0 0 18px rgba(var(--cyan), .22));
}
@keyframes gridMove{
  from{ background-position: 0 0, 0 0, 50% 30%; }
  to{ background-position: 0 42px, 42px 0, 50% 30%; }
}

.particle-field{
  position: fixed;
  inset: 0;
  pointer-events:none;
  opacity: .40;
  mix-blend-mode: screen;
  background:
    radial-gradient(1px 1px at 8% 18%, rgba(255,255,255,.6), transparent 60%),
    radial-gradient(1px 1px at 16% 40%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(1px 1px at 28% 26%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(1px 1px at 38% 14%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(1px 1px at 52% 30%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(1px 1px at 64% 16%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(1px 1px at 76% 34%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1px 1px at 88% 22%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(1px 1px at 12% 78%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(1px 1px at 34% 86%, rgba(255,255,255,.55), transparent 60%),
    radial-gradient(1px 1px at 58% 78%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(1px 1px at 82% 86%, rgba(255,255,255,.5), transparent 60%);
  animation: drift 8s ease-in-out infinite alternate;
}
@keyframes drift{
  from{ transform: translateY(0); }
  to{ transform: translateY(-10px); }
}

.streaks{
  position: fixed;
  inset: -20vh -20vw;
  pointer-events:none;
  background:
    linear-gradient(120deg, transparent 0 45%, rgba(var(--cyan), .10) 48%, transparent 52%),
    linear-gradient(120deg, transparent 0 55%, rgba(var(--indigo), .10) 58%, transparent 62%),
    linear-gradient(120deg, transparent 0 65%, rgba(var(--pink), .08) 68%, transparent 72%);
  opacity: .35;
  filter: blur(0.2px);
  animation: streakMove 3.2s linear infinite;
}
@keyframes streakMove{
  from{ transform: translateX(-6%); }
  to{ transform: translateX(6%); }
}

.scanlines{
  position: fixed; inset:0; pointer-events:none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,.05),
    rgba(255,255,255,.05) 1px,
    rgba(0,0,0,0) 3px,
    rgba(0,0,0,0) 6px
  );
  opacity: .08;
  mix-blend-mode: overlay;
}
.noise{
  position: fixed; inset:0; pointer-events:none;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.25'/%3E%3C/svg%3E");
  opacity: .04;
  mix-blend-mode: overlay;
}

/* ===== title glitch ===== */
.glitch{
  position: relative;
  display:inline-block;
  text-shadow: 0 0 16px rgba(var(--cyan), .22), 0 0 28px rgba(var(--indigo), .18);
}
.glitch::before, .glitch::after{
  content: attr(data-text);
  position:absolute; left:0; top:0; width:100%;
  opacity:.85;
}
.glitch::before{
  transform: translate(1px,-1px);
  color: rgba(var(--cyan), .90);
  clip-path: inset(0 0 55% 0);
  animation: g1 2.2s infinite linear alternate;
}
.glitch::after{
  transform: translate(-1px,1px);
  color: rgba(var(--pink), .90);
  clip-path: inset(50% 0 0 0);
  animation: g2 1.9s infinite linear alternate;
}
@keyframes g1{
  0%{ clip-path: inset(0 0 60% 0); }
  40%{ clip-path: inset(0 0 40% 0); }
  100%{ clip-path: inset(0 0 62% 0); }
}
@keyframes g2{
  0%{ clip-path: inset(48% 0 0 0); }
  35%{ clip-path: inset(58% 0 0 0); }
  100%{ clip-path: inset(46% 0 0 0); }
}

.pill{
  font-size: 12px;
  border: 1px solid rgba(var(--cyan), .35);
  background: rgba(2,6,23,.60);
  border-radius: 999px;
  padding: 6px 10px;
  color: rgb(226 232 240);
  box-shadow: 0 0 18px rgba(var(--cyan), .14);
  white-space: nowrap;
}

/* ===== card neon + HUD corners ===== */
.card{
  border-radius: 22px;
  padding: 18px;
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(2,6,23,.74), rgba(2,6,23,.46)) padding-box,
    linear-gradient(135deg, rgba(var(--cyan), .80), rgba(var(--indigo), .92), rgba(var(--pink), .80)) border-box;
  background-size: 100% 100%, 260% 260%;
  animation: borderFlow 5.2s linear infinite;
  box-shadow:
    0 0 0 1px rgba(148,163,184,.10) inset,
    0 22px 60px rgba(0,0,0,.46),
    0 0 34px rgba(var(--indigo), .10);
  backdrop-filter: blur(10px);
  position: relative;
}
@keyframes borderFlow{
  0%{ background-position: 0 0, 0% 50%; }
  100%{ background-position: 0 0, 100% 50%; }
}

.hud-corner{
  position:absolute;
  width: 26px;
  height: 26px;
  border: 2px solid rgba(var(--cyan), .35);
  filter: drop-shadow(0 0 14px rgba(var(--cyan), .12));
  opacity: .85;
}
.hud-corner.tl{ top: 10px; left: 10px; border-right: 0; border-bottom: 0; border-radius: 14px 0 0 0; }
.hud-corner.tr{ top: 10px; right: 10px; border-left: 0; border-bottom: 0; border-radius: 0 14px 0 0; }
.hud-corner.bl{ bottom: 10px; left: 10px; border-right: 0; border-top: 0; border-radius: 0 0 0 14px; }
.hud-corner.br{ bottom: 10px; right: 10px; border-left: 0; border-top: 0; border-radius: 0 0 14px 0; }

.field span{ display:block; margin-bottom:6px; font-size:12px; color: rgb(148 163 184); }
.input-wrap{ position: relative; }

.input{
  width:100%;
  border-radius: 16px;
  border: 1px solid rgba(148,163,184,.18);
  background: rgba(2,6,23,.40);
  padding: 11px 12px;
  outline:none;
  transition: 140ms ease;
  box-shadow: 0 0 0 1px rgba(255,255,255,.02) inset;
}
.input::placeholder{ color: rgba(148,163,184,.60); }
.input:focus{
  border-color: rgba(var(--cyan), .58);
  box-shadow: 0 0 0 4px rgba(var(--cyan), .12), 0 0 26px rgba(var(--cyan), .12);
}

.icon-btn{
  position:absolute; top:50%; right:8px; transform: translateY(-50%);
  width: 34px; height: 34px;
  border-radius: 14px;
  border: 1px solid rgba(var(--cyan), .25);
  background: rgba(2,6,23,.50);
  color: rgb(226 232 240);
  transition: 140ms ease;
  box-shadow: 0 0 18px rgba(var(--cyan), .10);
}
.icon-btn:hover{ border-color: rgba(var(--cyan), .40); filter: brightness(1.08); }
.icon-btn:active{ transform: translateY(-50%) scale(.98); }

.btn{
  border-radius: 16px;
  padding: 11px 16px;
  font-size: 14px;
  border: 1px solid rgba(148,163,184,.18);
  transition: 140ms ease;
  user-select:none;
  display:inline-flex;
  align-items:center;
  gap: 10px;
}
.btn:disabled{ opacity:.7; cursor:not-allowed; }

.btn-primary{
  position: relative;
  overflow: hidden;
  color: #eaf2ff;
  border-color: rgba(var(--cyan), .25);
  background: linear-gradient(90deg, rgba(var(--indigo), .95), rgba(var(--cyan), .88), rgba(var(--pink), .88));
  box-shadow: 0 0 0 1px rgba(255,255,255,.06) inset, 0 16px 40px rgba(0,0,0,.35), 0 0 34px rgba(var(--indigo), .18);
  animation: btnPulse 1.45s ease-in-out infinite alternate;
}
@keyframes btnPulse{ from{ filter: brightness(1.00); } to{ filter: brightness(1.12); } }
.btn-primary:active{ transform: translateY(1px) scale(.995); }

.spinner{
  width:16px; height:16px; border-radius:999px;
  border:2px solid rgba(255,255,255,.35);
  border-top-color: rgba(255,255,255,.95);
  animation: spin .8s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }

.badge{
  font-size: 12px;
  border: 1px solid rgba(148,163,184,.18);
  background: rgba(2,6,23,.42);
  border-radius: 999px;
  padding: 6px 10px;
  color: rgb(226 232 240);
  box-shadow: 0 0 14px rgba(var(--cyan), .10);
  white-space: nowrap;
}
.badge.ok{ border-color: rgba(var(--green), .40); background: rgba(var(--green), .10); }
.badge.warn{ border-color: rgba(var(--amber), .45); background: rgba(var(--amber), .10); }
.badge.info{ border-color: rgba(var(--cyan), .45); background: rgba(var(--cyan), .10); }
.badge.err{ border-color: rgba(var(--red), .45); background: rgba(var(--red), .10); }

.stat{
  border: 1px solid rgba(148,163,184,.16);
  background: rgba(2,6,23,.28);
  border-radius: 18px;
  padding: 12px;
  box-shadow: 0 0 26px rgba(var(--indigo), .06);
}
.stat-label{ font-size:12px; color: rgb(148 163 184); }
.stat-value{
  margin-top: 6px;
  font-weight: 900;
  color: rgb(226 232 240);
  text-shadow: 0 0 16px rgba(var(--cyan), .12);
}

.result-icon{
  width: 40px; height: 40px;
  border-radius: 16px;
  display:flex; align-items:center; justify-content:center;
  border: 1px solid rgba(var(--cyan), .35);
  background: rgba(2,6,23,.35);
  font-weight: 900;
  box-shadow: 0 0 28px rgba(var(--cyan), .14);
}

.toast{
  border: 1px solid rgba(148,163,184,.18);
  background: rgba(2,6,23,.88);
  border-radius: 16px;
  padding: 10px 12px;
  box-shadow: 0 14px 34px rgba(0,0,0,.40);
  font-size: 14px;
}

/* ===== popup modal ===== */
.modal{
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 18px;
  background: radial-gradient(900px 520px at 50% 20%, rgba(var(--cyan), .12), transparent 60%), rgba(0,0,0,.66);
  backdrop-filter: blur(10px);
}

.modal-panel{
  width: min(560px, 92vw);
  border-radius: 22px;
  padding: 16px;
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(2,6,23,.82), rgba(2,6,23,.56)) padding-box,
    linear-gradient(135deg, rgba(var(--cyan), .85), rgba(var(--indigo), .96), rgba(var(--pink), .85)) border-box;
  box-shadow: 0 0 0 1px rgba(255,255,255,.04) inset, 0 30px 80px rgba(0,0,0,.55), 0 0 44px rgba(var(--cyan), .12);
  position: relative;
}

.modal-close{
  position: absolute;
  right: 12px;
  top: 12px;
  width: 40px;
  height: 40px;
  border-radius: 16px;
  border: 1px solid rgba(var(--cyan), .28);
  background: rgba(2,6,23,.55);
  color: rgb(226 232 240);
  box-shadow: 0 0 22px rgba(var(--cyan), .12);
  transition: 140ms ease;
}
.modal-close:hover{ border-color: rgba(var(--cyan), .42); filter: brightness(1.10); }
.modal-close:active{ transform: scale(.98); }

/* ===== confetti (CSS-only) ===== */
.confetti{ position: fixed; inset:0; pointer-events:none; z-index: 90; }
.c{
  position: absolute;
  top: -12vh;
  left: calc(var(--x) * 1%);
  width: calc(var(--s) * 1px);
  height: calc(var(--s) * 1px);
  background: hsl(var(--h) 92% 62%);
  border-radius: 2px;
  box-shadow: 0 0 18px rgba(255,255,255,.12);
  animation: fall calc(var(--t) * 1s) ease-in forwards;
  animation-delay: calc(var(--d) * 1s);
  opacity: 0;
}
.c.tri{ border-radius: 0; clip-path: polygon(50% 0%, 0% 100%, 100% 100%); }
@keyframes fall{
  0%{ transform: translate3d(0,0,0) rotate(0deg); opacity: 0; }
  10%{ opacity: 1; }
  100%{ transform: translate3d(0, 120vh, 0) rotate(720deg); opacity: 0; }
}

@media (prefers-reduced-motion: reduce){
  .bg-art, .grid-floor, .particle-field, .streaks, .btn-primary, .glitch::before, .glitch::after, .c{ animation: none !important; }
}
/* ===== POPUP: nền sau mờ + tối mạnh ===== */
.modal{
  /* tối + vignette + glow */
  background:
    radial-gradient(900px 520px at 50% 15%, rgba(var(--cyan), .18), transparent 55%),
    radial-gradient(1200px 900px at 50% 100%, rgba(var(--indigo), .16), transparent 60%),
    radial-gradient(1000px 800px at 50% 50%, rgba(0,0,0,.35), rgba(0,0,0,.75)),
    rgba(0,0,0,.74);

  /* mờ phía sau */
  backdrop-filter: blur(16px) saturate(1.15) contrast(1.05);
  -webkit-backdrop-filter: blur(16px) saturate(1.15) contrast(1.05);
}

/* thêm lớp dim overlay cho chắc ăn (một số máy blur nhẹ) */
.modal::before{
  content:"";
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.30);
  pointer-events: none;
}

/* ===== POPUP: panel đậm + neon mạnh ===== */
.modal-panel{
  /* nền tối hơn, có chiều sâu */
  background:
    linear-gradient(180deg, rgba(1,4,18,.92), rgba(2,6,23,.80)) padding-box,
    linear-gradient(135deg,
      rgba(var(--cyan), .92),
      rgba(var(--indigo), .98),
      rgba(var(--pink), .92)
    ) border-box;

  /* viền neon rõ, glow mạnh */
  box-shadow:
    0 0 0 1px rgba(255,255,255,.06) inset,
    0 30px 90px rgba(0,0,0,.70),
    0 0 55px rgba(var(--cyan), .20),
    0 0 75px rgba(var(--indigo), .16);

  /* nhìn “đậm” hơn */
  border: 1px solid transparent;
}

/* lớp highlight phía trên panel (holo shine) */
.modal-panel::before{
  content:"";
  position:absolute;
  inset: -2px;
  border-radius: 22px;
  pointer-events:none;
  background:
    radial-gradient(500px 220px at 25% 10%, rgba(255,255,255,.10), transparent 60%),
    radial-gradient(420px 220px at 75% 12%, rgba(var(--cyan), .10), transparent 62%),
    radial-gradient(520px 260px at 50% 0%, rgba(var(--pink), .08), transparent 62%);
  mix-blend-mode: screen;
  opacity: .9;
}

/* nút đóng rõ nét hơn */
.modal-close{
  background: rgba(1,4,18,.72);
  border-color: rgba(var(--cyan), .40);
  box-shadow:
    0 0 0 1px rgba(255,255,255,.05) inset,
    0 0 26px rgba(var(--cyan), .18);
}
.modal-close:hover{
  border-color: rgba(var(--cyan), .60);
  box-shadow:
    0 0 0 1px rgba(255,255,255,.06) inset,
    0 0 34px rgba(var(--cyan), .22);
}

/* badge trong popup nổi hơn */
.modal .badge{
  box-shadow: 0 0 18px rgba(var(--cyan), .12);
}

/* icon kết quả neon mạnh */
.modal .result-icon{
  border-color: rgba(var(--cyan), .55);
  box-shadow:
    0 0 0 1px rgba(255,255,255,.05) inset,
    0 0 34px rgba(var(--cyan), .22);
}