/* ============================================================
   fx8d.css — Hiệu ứng "8D/10D" siêu đỉnh cho Nody Tarot
   Depth, holographic prism, particle burst, magnetic tilt,
   liquid shimmer, aurora flip — tất cả GPU-accelerated.
   Tự tắt hoàn toàn khi data-perf="low" hoặc reduced-motion.
   ============================================================ */

/* ============================================================
   1. Biến CSS bổ sung
   ============================================================ */
:root {
  --holo-1: #ff6eb4;
  --holo-2: #5fb4ec;
  --holo-3: #7ff7b0;
  --holo-4: #ffe680;
  --holo-5: #b87fff;
  --depth-shadow: 0 60px 120px rgba(0,0,0,.7), 0 20px 40px rgba(0,0,0,.5);
  --card-3d-depth: 24px;
}

/* ============================================================
   2. Lá bài fan — MAGNETIC TILT 6-axis
   Khi hover, lá nghiêng theo hướng con trỏ (JS gắn style)
   + ánh holographic chạy theo góc nghiêng.
   ============================================================ */
html:not([data-perf="low"]) .fan-card {
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform .28s cubic-bezier(.22,.78,.28,1),
              filter .22s ease,
              opacity .42s ease !important;
}

/* Card back holographic — ánh cầu vồng khi tilt */
html:not([data-perf="low"]) .fan-card .card-back::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    var(--holo-angle, 135deg),
    transparent 20%,
    rgba(255, 110, 180, .18) 30%,
    rgba(95, 180, 236, .22) 40%,
    rgba(127, 247, 176, .18) 50%,
    rgba(255, 230, 128, .16) 60%,
    rgba(184, 127, 255, .18) 70%,
    transparent 80%
  );
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
  mix-blend-mode: screen;
  z-index: 2;
}
html:not([data-perf="low"]) .fan-card:hover .card-back::after {
  opacity: 1;
}

/* ============================================================
   3. Lá bài trên bàn — THICK 3D CARD với bề dày thật
   ============================================================ */
html:not([data-perf="low"]) .slot {
  transform-style: preserve-3d;
}

/* Tạo "bề dày" lá bài — lớp cạnh bên */
html:not([data-perf="low"]) .flip::after {
  content: '';
  position: absolute;
  width: var(--card-3d-depth);
  height: 100%;
  right: calc(-1 * var(--card-3d-depth) / 2);
  top: 0;
  transform: rotateY(90deg) translateZ(calc(var(--card-3d-depth) / 2 * -1));
  background: linear-gradient(180deg,
    rgba(95, 180, 236, .3) 0%,
    rgba(10, 18, 36, .8) 40%,
    rgba(10, 18, 36, .8) 60%,
    rgba(95, 180, 236, .2) 100%);
  border-radius: 0 9px 9px 0;
  pointer-events: none;
}

/* Đáy lá — bề dày dưới */
html:not([data-perf="low"]) .flip::before {
  content: '';
  position: absolute;
  width: 100%;
  height: var(--card-3d-depth);
  bottom: calc(-1 * var(--card-3d-depth) / 2);
  left: 0;
  transform: rotateX(-90deg) translateZ(calc(var(--card-3d-depth) / 2));
  background: linear-gradient(90deg,
    rgba(95, 180, 236, .25),
    rgba(10, 18, 36, .9),
    rgba(95, 180, 236, .2));
  pointer-events: none;
}

/* Drop shadow 3D đậm khi lá đã lật */
html:not([data-perf="low"]) .flip.turned {
  filter: drop-shadow(0 24px 48px rgba(0,0,0,.6))
          drop-shadow(0 8px 16px rgba(95,180,236,.2));
}

/* ============================================================
   4. HOLOGRAPHIC PRISM FACE — mặt trước lá bài
   Ánh cầu vồng 7 màu chạy theo góc hover
   ============================================================ */
@keyframes holoShift {
  0%   { background-position: 0% 0%; }
  25%  { background-position: 100% 0%; }
  50%  { background-position: 100% 100%; }
  75%  { background-position: 0% 100%; }
  100% { background-position: 0% 0%; }
}
@keyframes holoSpark {
  0%,100% { opacity: 0; }
  15%,85% { opacity: 0; }
  40%     { opacity: .7; }
  60%     { opacity: .5; }
}

html:not([data-perf="low"]) .face.front::before {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(
      var(--holo-angle, 115deg),
      transparent 25%,
      color-mix(in srgb, var(--holo-1) 28%, transparent) 33%,
      color-mix(in srgb, var(--holo-2) 32%, transparent) 41%,
      color-mix(in srgb, var(--holo-3) 26%, transparent) 49%,
      color-mix(in srgb, var(--holo-4) 24%, transparent) 57%,
      color-mix(in srgb, var(--holo-5) 28%, transparent) 65%,
      transparent 73%
    );
  background-size: 200% 200%;
  opacity: 0;
  mix-blend-mode: color-dodge;
  border-radius: inherit;
  pointer-events: none;
  z-index: 3;
  transition: opacity .4s ease;
}
html:not([data-perf="low"]) .flip.turned:hover .face.front::before {
  opacity: 1;
  animation: holoShift 4s linear infinite;
}

/* Sparkle dots — hạt kim cương nhỏ lấp lánh trên mặt lá */
html:not([data-perf="low"]) .face.front .sparkle-layer {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,.9) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,.6) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,.8) 1px, transparent 1px);
  background-size: 60px 60px, 45px 45px, 80px 80px;
  background-position: 10px 10px, 30px 25px, 5px 50px;
  opacity: 0;
  animation: holoSpark 3s ease-in-out infinite;
  pointer-events: none;
  z-index: 4;
  border-radius: inherit;
  mix-blend-mode: screen;
}

/* ============================================================
   5. LIQUID SHIMMER — ánh lỏng chạy xuống lá khi lật
   ============================================================ */
@keyframes liquidRun {
  0%   { transform: translateY(-120%) skewY(-8deg); opacity: 0; }
  15%  { opacity: .6; }
  85%  { opacity: .4; }
  100% { transform: translateY(120%) skewY(-8deg); opacity: 0; }
}

html:not([data-perf="low"]) .face.front .liquid-sheen {
  position: absolute;
  top: 0; left: -30%;
  width: 160%; height: 60%;
  background: linear-gradient(
    180deg,
    transparent,
    rgba(255,255,255,.55) 30%,
    rgba(200,240,255,.4) 50%,
    rgba(255,255,255,.55) 70%,
    transparent
  );
  transform: translateY(-120%) skewY(-8deg);
  pointer-events: none;
  z-index: 5;
  border-radius: 50%;
  filter: blur(3px);
}

/* Chạy 1 lần khi lá vừa lật xong */
html:not([data-perf="low"]) .flip.turned .face.front .liquid-sheen {
  animation: liquidRun 1.1s cubic-bezier(.22,.78,.28,1) .05s 1 forwards;
}

/* ============================================================
   6. PARTICLE BURST — hạt sáng bắn ra khi rút lá
   (Được tạo bởi JS — fx8d.js)
   ============================================================ */
@keyframes particleFly {
  0%   { transform: translate(0,0) scale(1); opacity: 1; }
  100% { transform: translate(var(--px), var(--py)) scale(0); opacity: 0; }
}
.card-particle {
  position: fixed;
  width: 6px; height: 6px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  animation: particleFly var(--dur, .8s) ease-out forwards;
  background: radial-gradient(circle, var(--pc, #5fb4ec), transparent);
  box-shadow: 0 0 6px var(--pc, #5fb4ec);
}

/* ============================================================
   7. AURORA FLIP MAGIC — nâng cấp animation lật lá (thay thế cũ)
   ============================================================ */
@keyframes nodyFlip10D {
  0%   {
    transform: rotateY(0deg) rotateX(0deg) rotateZ(0deg) scale(1);
    filter: brightness(1) saturate(1) drop-shadow(0 0 0 transparent);
  }
  20%  {
    transform: rotateY(55deg) rotateX(-8deg) rotateZ(-4deg) scale(1.08) translateZ(30px);
    filter: brightness(1.5) saturate(1.8) drop-shadow(0 0 30px color-mix(in srgb, var(--holo-1) 70%, transparent));
  }
  40%  {
    transform: rotateY(110deg) rotateX(6deg) rotateZ(3deg) scale(1.12) translateZ(50px);
    filter: brightness(1.7) saturate(2.2) drop-shadow(0 0 45px color-mix(in srgb, var(--holo-2) 80%, transparent));
  }
  55%  {
    transform: rotateY(155deg) rotateX(-5deg) rotateZ(-2deg) scale(1.1) translateZ(40px);
    filter: brightness(1.6) saturate(2) drop-shadow(0 0 35px color-mix(in srgb, var(--holo-3) 70%, transparent));
  }
  70%  {
    transform: rotateY(175deg) rotateX(3deg) rotateZ(1deg) scale(1.05) translateZ(20px);
    filter: brightness(1.3) saturate(1.5) drop-shadow(0 0 20px color-mix(in srgb, var(--holo-4) 60%, transparent));
  }
  85%  {
    transform: rotateY(180deg) rotateX(-2deg) rotateZ(0deg) scale(1.02);
    filter: brightness(1.1) saturate(1.2) drop-shadow(0 10px 30px rgba(95,180,236,.4));
  }
  100% {
    transform: rotateY(180deg) rotateX(0deg) rotateZ(0deg) scale(1);
    filter: brightness(1) saturate(1) drop-shadow(0 16px 40px rgba(0,0,0,.5));
  }
}

@keyframes nodySheen10D {
  0%   { transform: translateX(-160%) rotate(12deg) scaleY(2); opacity: 0; }
  20%  { opacity: .9; }
  80%  { opacity: .5; }
  100% { transform: translateX(160%) rotate(12deg) scaleY(2); opacity: 0; }
}

/* Ghi đè animation cũ bằng phiên bản 10D */
html:not([data-perf="low"]) .slot:not(.crossed) .flip.turned,
html:not([data-perf="low"]) .daily-card.turned {
  animation: nodyFlip10D 1.1s cubic-bezier(.22,.9,.24,1) both !important;
}

html:not([data-perf="low"]) .face.front::after {
  content: '';
  position: absolute; top: -40%; bottom: -40%; left: -30%; width: 60%;
  background: linear-gradient(
    110deg,
    transparent 0%,
    rgba(255,255,255,.08) 20%,
    rgba(255,255,255,.75) 45%,
    rgba(200,240,255,.6) 55%,
    rgba(255,255,255,.08) 80%,
    transparent 100%
  );
  transform: translateX(-160%) rotate(12deg);
  pointer-events: none;
  mix-blend-mode: overlay;
  z-index: 6;
}

html:not([data-perf="low"]) .slot:not(.crossed) .flip.turned .face.front::after,
html:not([data-perf="low"]) .daily-card.turned .face.front::after {
  animation: nodySheen10D 1.15s ease-out .08s 1 !important;
}

/* ============================================================
   8. DEPTH PARALLAX on the reading table
   Các slot lá bài có độ sâu 3D khác nhau theo vị trí
   ============================================================ */
html:not([data-perf="low"]) .table {
  perspective: 2000px !important;
  perspective-origin: 50% 35% !important;
}

html:not([data-perf="low"]) .slot:nth-child(1)  { z-index: 5;  }
html:not([data-perf="low"]) .slot:nth-child(2)  { z-index: 8;  }
html:not([data-perf="low"]) .slot:nth-child(3)  { z-index: 4;  }
html:not([data-perf="low"]) .slot:nth-child(4)  { z-index: 6;  }
html:not([data-perf="low"]) .slot:nth-child(5)  { z-index: 7;  }
html:not([data-perf="low"]) .slot:nth-child(6)  { z-index: 3;  }
html:not([data-perf="low"]) .slot:nth-child(7)  { z-index: 9;  }
html:not([data-perf="low"]) .slot:nth-child(8)  { z-index: 10; }
html:not([data-perf="low"]) .slot:nth-child(9)  { z-index: 5;  }
html:not([data-perf="low"]) .slot:nth-child(10) { z-index: 11; }


/* Section 27 (dealIn8D) xử lý animation cho .slot — bỏ rule trùng ở đây */

/* ============================================================
   9. FAN DECK — perspective sâu hơn + depth fog
   ============================================================ */
html:not([data-perf="low"]) .deck-stage {
  perspective: 2200px !important;
  perspective-origin: 50% 30% !important;
}

/* Sương mù chiều sâu — các lá xa mờ dần */
html:not([data-perf="low"]) .fan-card {
  filter: brightness(calc(0.75 + var(--depth-bright, 0.25)));
}

/* Lá ở giữa fan (index gần 12/24) sáng nhất */
html:not([data-perf="low"]) .fan-card:nth-child(11),
html:not([data-perf="low"]) .fan-card:nth-child(12),
html:not([data-perf="low"]) .fan-card:nth-child(13),
html:not([data-perf="low"]) .fan-card:nth-child(14) {
  --depth-bright: 0.4;
}

/* ============================================================
   10. COSMIC GLOW BACKDROP — nền trang phát sáng theo topic
   ============================================================ */
@keyframes cosmicPulse {
  0%,100% { opacity: .55; transform: scale(1); }
  50%      { opacity: .85; transform: scale(1.08); }
}

html:not([data-perf="low"]) body::after {
  content: '';
  position: fixed; inset: -20%; z-index: -1; pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%,
      color-mix(in srgb, var(--topic-accent, var(--moon)) 18%, transparent),
      transparent 65%),
    radial-gradient(ellipse 50% 45% at 80% 85%,
      color-mix(in srgb, var(--blossom) 14%, transparent),
      transparent 60%),
    radial-gradient(ellipse 40% 50% at 50% 50%,
      color-mix(in srgb, var(--mist) 8%, transparent),
      transparent 70%);
  animation: cosmicPulse 14s ease-in-out infinite;
}

/* ============================================================
   11. MAGNETIC CARD HOVER — lá bài fan phản ứng theo chuột
   (Cần JS để update --mx --my; fallback graceful nếu không có JS)
   ============================================================ */
html:not([data-perf="low"]) .fan-card:hover:not(.taken) {
  --holo-angle: calc(115deg + var(--mx, 0deg));
  transform: var(--fan-base, none)
             translateY(-28px)
             translateZ(60px)
             rotateX(calc(var(--my, 0) * -12deg))
             rotateY(calc(var(--mx, 0) * 12deg)) !important;
  filter:
    brightness(1.3)
    drop-shadow(0 0 22px color-mix(in srgb, var(--topic-accent, var(--moon)) 80%, transparent))
    drop-shadow(0 12px 30px rgba(0,0,0,.6)) !important;
  transition: transform .12s ease, filter .15s ease !important;
}

/* ============================================================
   12. RESULT BLOCK — glowing reveal
   ============================================================ */
@keyframes resultReveal {
  0%  { opacity: 0; transform: translateY(30px) scale(.97); filter: blur(6px); }
  60% { filter: blur(0); }
  100%{ opacity: 1; transform: none; filter: none; }
}
html:not([data-perf="low"]) .result {
  animation: resultReveal .7s cubic-bezier(.22,.78,.28,1) !important;
}

/* ============================================================
   13. STAR FIELD — tinh tế hơn, nhiều lớp depth
   ============================================================ */
.cosmic-star {
  will-change: opacity, transform;
  border-radius: 50%;
}
/* Sao lớn = gần, sáng hơn */
.cosmic-star.near  { opacity: .8 !important; filter: blur(0); }
/* Sao nhỏ = xa, mờ */
.cosmic-star.far   { opacity: .2 !important; filter: blur(0.5px); }
/* Sao trung */
.cosmic-star.mid   { opacity: .45 !important; }

@keyframes starDrift {
  0%,100% { transform: translateY(0) translateX(0); }
  33%     { transform: translateY(-3px) translateX(2px); }
  66%     { transform: translateY(2px) translateX(-1px); }
}
html:not([data-perf="low"]) .cosmic-star {
  animation: twinkle var(--dur,3s) ease-in-out infinite,
             starDrift calc(var(--dur,3s) * 3) ease-in-out infinite !important;
  animation-delay: var(--delay,0s) !important;
}

/* ============================================================
   14. MODAL — siêu smooth entry với 3D depth
   ============================================================ */
@keyframes modalEntry10D {
  0%  { opacity:0; transform: translateY(40px) scale(.93) rotateX(8deg); filter: blur(8px); }
  60% { filter: blur(0); }
  100%{ opacity:1; transform: none; filter: none; }
}
html:not([data-perf="low"]) .modal.open .modal-box {
  animation: modalEntry10D .55s cubic-bezier(.22,.78,.28,1) !important;
  transform-origin: center bottom !important;
}

/* ============================================================
   15. STEP PROGRESS — neon pill indicator
   ============================================================ */
html:not([data-perf="low"]) .step.on {
  text-shadow: 0 0 10px color-mix(in srgb, var(--topic-accent, var(--moon)) 80%, transparent);
}
html:not([data-perf="low"]) .step.on b {
  box-shadow:
    0 0 0 1px var(--topic-accent, var(--moon)),
    0 0 12px color-mix(in srgb, var(--topic-accent, var(--moon)) 60%, transparent),
    0 0 24px color-mix(in srgb, var(--topic-accent, var(--moon)) 30%, transparent) !important;
}
html:not([data-perf="low"]) .step.done b {
  box-shadow:
    0 0 8px color-mix(in srgb, var(--moon) 50%, transparent) !important;
}

/* ============================================================
   16. HERO CARD — nâng cấp hiệu ứng trang chủ
   ============================================================ */
@keyframes heroFloat10D {
  0%   { transform: rotateY(-16deg) rotateX(8deg) rotateZ(-2deg) translateY(0); }
  25%  { transform: rotateY(-8deg) rotateX(4deg) rotateZ(0deg) translateY(-10px); }
  50%  { transform: rotateY(16deg) rotateX(-7deg) rotateZ(2deg) translateY(-18px); }
  75%  { transform: rotateY(8deg) rotateX(-3deg) rotateZ(1deg) translateY(-8px); }
  100% { transform: rotateY(-16deg) rotateX(8deg) rotateZ(-2deg) translateY(0); }
}
html:not([data-perf="low"]) .hero-card {
  animation: heroFloat10D 10s ease-in-out infinite !important;
  box-shadow:
    0 40px 100px rgba(0,0,0,.65),
    0 0 60px color-mix(in srgb, var(--moon) 25%, transparent),
    0 0 120px color-mix(in srgb, var(--blossom) 12%, transparent) !important;
}

/* Viền aurora xung quanh hero card */
html:not([data-perf="low"]) .hero-card::before {
  content: '';
  position: absolute; inset: -3px;
  border-radius: 16px;
  background: linear-gradient(
    var(--holo-angle, 135deg),
    var(--holo-1), var(--holo-2), var(--holo-3),
    var(--holo-4), var(--holo-5), var(--holo-1)
  );
  background-size: 300% 300%;
  animation: holoShift 5s linear infinite, cosmicPulse 4s ease-in-out infinite;
  z-index: -1;
  opacity: .6;
  filter: blur(4px);
}

/* ============================================================
   17. CHIP — glow theo topic
   ============================================================ */
html:not([data-perf="low"]) .chip {
  transition: box-shadow .3s ease, transform .2s ease;
}
html:not([data-perf="low"]) .chip:hover {
  box-shadow: 0 0 12px color-mix(in srgb, var(--topic-accent, var(--moon)) 50%, transparent);
  transform: translateY(-1px);
}

/* ============================================================
   18. SYNTH RESULT — nổi bật blockquote
   ============================================================ */
html:not([data-perf="low"]) .result blockquote {
  position: relative;
  overflow: hidden;
}
html:not([data-perf="low"]) .result blockquote::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--topic-accent, var(--moon)) 8%, transparent),
    transparent 60%);
  pointer-events: none;
}

/* ============================================================
   19. CINZEL FONT — tên lá bài có font tarot/gothic đẹp
   ============================================================ */
.card-strip .nm,
.detail-top h3,
.detail-pos,
.pos-label {
  font-family: 'Cinzel', 'Lora', Georgia, serif !important;
  letter-spacing: .04em;
}

/* Tên lá trong chi tiết — nổi bật */
.detail-top h3 {
  font-size: 1.25rem !important;
  background: linear-gradient(135deg, var(--ink), var(--moon));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   20. TOPIC BANNER — đẹp hơn, có shimmer
   ============================================================ */
.detail-topic-banner {
  position: relative;
  overflow: hidden;
}
html:not([data-perf="low"]) .detail-topic-banner::after {
  content: '';
  position: absolute; top: 0; left: -60%; width: 40%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
  animation: liquidRun 2.5s ease-in-out infinite;
  pointer-events: none;
}

/* ============================================================
   21. MOBILE 10D — touch feedback thay cho hover
   ============================================================ */
@media (pointer: coarse) {
  /* Tap glow thay cho hover */
  .flip:active:not(.turned) {
    filter: brightness(1.3)
            drop-shadow(0 0 20px color-mix(in srgb, var(--topic-accent, var(--moon)) 80%, transparent)) !important;
    transform: scale(1.05) translateY(-8px) !important;
    transition: transform .15s ease, filter .15s ease !important;
  }

  /* Fan card tap */
  .fan-card:active:not(.taken) {
    filter: brightness(1.4)
            drop-shadow(0 0 28px color-mix(in srgb, var(--topic-accent, var(--moon)) 90%, transparent)) !important;
    transition: filter .1s ease !important;
  }

  /* Tool card tap */
  .tool:active {
    transform: scale(.97) !important;
    transition: transform .1s ease !important;
  }

  /* Modal full screen trượt lên từ dưới */
  @keyframes slideUpModal {
    from { transform: translateY(100%); opacity: 0; }
    to   { transform: translateY(0);   opacity: 1; }
  }
  .modal.open .modal-box {
    animation: slideUpModal .4s cubic-bezier(.22,.78,.28,1) !important;
  }
}

/* ============================================================
   22. GLOW CURSOR — con trỏ để lại vệt sáng (desktop only)
   Được tạo bởi fx8d.js via .cursor-glow element
   ============================================================ */
.cursor-glow {
  position: fixed;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle,
    color-mix(in srgb, var(--topic-accent, var(--moon)) 12%, transparent) 0%,
    transparent 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: left .08s ease, top .08s ease, opacity .3s ease;
  opacity: 0;
}
body:hover .cursor-glow { opacity: 1; }
@media (pointer: coarse) { .cursor-glow { display: none !important; } }
html[data-perf="low"] .cursor-glow { display: none !important; }

/* ============================================================
   23. RESULT SECTION — topic-specific accent border
   ============================================================ */
.topic-specific-block {
  position: relative;
  overflow: hidden;
}
html:not([data-perf="low"]) .topic-specific-block::before {
  content: '';
  position: absolute; top: 0; left: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(
    180deg,
    var(--topic-accent, var(--moon)),
    var(--blossom),
    var(--topic-accent, var(--moon))
  );
  animation: cosmicPulse 3s ease-in-out infinite;
  border-radius: 3px;
}


/* ============================================================
   24. HOLOGRAPHIC SCANLINES — dải quét ngang siêu đẳng
   Dùng element JS-injected (#scanline-overlay) thay body::before
   để không conflict với aurora backdrop đã dùng body::before
   ============================================================ */
@media (pointer: fine) {
  #scanline-overlay {
    position: fixed; inset: 0; z-index: 9998; pointer-events: none;
    background: repeating-linear-gradient(
      0deg,
      transparent 0px,
      transparent 3px,
      rgba(95,180,236,.018) 3px,
      rgba(95,180,236,.018) 4px
    );
    animation: scanlineRoll 8s linear infinite;
    will-change: background-position;
  }
  @keyframes scanlineRoll {
    from { background-position: 0 0;    }
    to   { background-position: 0 80px; }
  }
}
html[data-perf="low"] #scanline-overlay { display: none !important; }

/* ============================================================
   25. AURORA PORTAL BACKGROUND — cổng không gian phía sau
   Dùng #aurora-portal element (JS-injected) thay body::before
   để không conflict với upgrade.css nody-aurora backdrop
   ============================================================ */
@keyframes auroraRotate {
  0%   { transform: rotate(0deg) scale(1); }
  50%  { transform: rotate(180deg) scale(1.15); }
  100% { transform: rotate(360deg) scale(1); }
}
@keyframes auroraFade {
  0%,100% { opacity: .045; }
  50%     { opacity: .09;  }
}

/* Aurora portal element được JS inject vào body */
#aurora-portal {
  position: fixed; inset: -30%; z-index: -2; pointer-events: none;
  background: conic-gradient(from 0deg,
    transparent 0%,
    rgba(95,180,236,.1) 8%,
    transparent 18%,
    rgba(184,127,255,.08) 28%,
    transparent 38%,
    rgba(127,247,176,.07) 48%,
    transparent 60%,
    rgba(255,110,180,.06) 70%,
    transparent 80%,
    rgba(95,180,236,.09) 92%,
    transparent 100%
  );
  animation: auroraRotate 28s linear infinite, auroraFade 7s ease-in-out infinite;
  will-change: transform, opacity;
  opacity: 0;
  transition: opacity 1.5s ease;
}
#aurora-portal.visible { opacity: 1; }
html[data-perf="low"] #aurora-portal { display: none !important; }

/* ============================================================
   26. CHROMATIC ABERRATION — lệch màu RGB khi lá vừa lật
   Hiệu ứng cực kỳ độc đáo, tắt sau 0.8s
   ============================================================ */
@keyframes chromaShift {
  0%   {
    text-shadow: none;
    filter: none;
  }
  15%  {
    filter:
      drop-shadow(-3px 0 0 rgba(255,50,50,.5))
      drop-shadow( 3px 0 0 rgba(50,50,255,.5));
  }
  45%  {
    filter:
      drop-shadow(-2px 0 0 rgba(255,50,50,.3))
      drop-shadow( 2px 0 0 rgba(50,50,255,.3));
  }
  100% { filter: none; }
}
html:not([data-perf="low"]) .flip.just-flipped {
  animation: chromaShift .8s ease-out forwards !important;
}

/* ============================================================
   27. 3D CARD STACK DEPTH — deal-in với chiều sâu Z
   Lá xuất hiện từ không gian 3D, tốc độ stagger
   ============================================================ */
@keyframes dealIn8D {
  0%  {
    opacity: 0;
    transform: translateZ(-200px) rotateX(35deg) rotateY(-15deg) scale(.6);
    filter: blur(8px) brightness(.5);
  }
  50% {
    filter: blur(2px) brightness(.9);
  }
  100% {
    opacity: 1;
    transform: translateZ(0) rotateX(0) rotateY(0) scale(1);
    filter: blur(0) brightness(1);
  }
}
html:not([data-perf="low"]) .slot {
  animation: dealIn8D .75s cubic-bezier(.22,.78,.28,1) backwards !important;
}
html:not([data-perf="low"]) .slot:nth-child(1)  { animation-delay: .05s !important; }
html:not([data-perf="low"]) .slot:nth-child(2)  { animation-delay: .12s !important; }
html:not([data-perf="low"]) .slot:nth-child(3)  { animation-delay: .19s !important; }
html:not([data-perf="low"]) .slot:nth-child(4)  { animation-delay: .26s !important; }
html:not([data-perf="low"]) .slot:nth-child(5)  { animation-delay: .33s !important; }
html:not([data-perf="low"]) .slot:nth-child(6)  { animation-delay: .40s !important; }
html:not([data-perf="low"]) .slot:nth-child(7)  { animation-delay: .47s !important; }
html:not([data-perf="low"]) .slot:nth-child(8)  { animation-delay: .54s !important; }
html:not([data-perf="low"]) .slot:nth-child(9)  { animation-delay: .61s !important; }
html:not([data-perf="low"]) .slot:nth-child(10) { animation-delay: .68s !important; }

/* ============================================================
   28. NEON GLOW BUTTON — CTA buttons siêu bắt mắt
   Target: .btn-moon (class thực tế dùng trong codebase)
   ============================================================ */
@keyframes neonPulse {
  0%,100% {
    box-shadow:
      0 0 5px var(--topic-accent, var(--moon)),
      0 0 20px color-mix(in srgb, var(--topic-accent, var(--moon)) 60%, transparent),
      0 0 40px color-mix(in srgb, var(--topic-accent, var(--moon)) 25%, transparent);
  }
  50% {
    box-shadow:
      0 0 8px var(--topic-accent, var(--moon)),
      0 0 35px color-mix(in srgb, var(--topic-accent, var(--moon)) 80%, transparent),
      0 0 65px color-mix(in srgb, var(--topic-accent, var(--moon)) 35%, transparent);
  }
}
html:not([data-perf="low"]) .btn-moon,
html:not([data-perf="low"]) .btn.primary {
  animation: neonPulse 2.8s ease-in-out infinite;
  will-change: box-shadow;
  transition: transform .18s ease, filter .18s ease !important;
}
html:not([data-perf="low"]) .btn-moon:hover,
html:not([data-perf="low"]) .btn.primary:hover {
  transform: translateY(-3px) scale(1.03) !important;
  filter: brightness(1.2) !important;
}
html:not([data-perf="low"]) .btn-moon:active,
html:not([data-perf="low"]) .btn.primary:active {
  transform: translateY(0) scale(.98) !important;
  transition-duration: .06s !important;
}

/* ============================================================
   29. GLOWING SECTION HEADERS — tiêu đề section sáng rực
   ============================================================ */
html:not([data-perf="low"]) .section-title,
html:not([data-perf="low"]) h2.title,
html:not([data-perf="low"]) .page-title {
  position: relative;
}
html:not([data-perf="low"]) .section-title::after,
html:not([data-perf="low"]) h2.title::after,
html:not([data-perf="low"]) .page-title::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg,
    transparent,
    var(--topic-accent, var(--moon)),
    var(--blossom),
    var(--topic-accent, var(--moon)),
    transparent);
  animation: titleLineShimmer 3s ease-in-out infinite;
}
@keyframes titleLineShimmer {
  0%,100% { opacity: .4; transform: scaleX(.7); }
  50%     { opacity: 1;  transform: scaleX(1);  }
}

/* ============================================================
   30. HOLOGRAPHIC FOIL — cực kỳ đẹp trên lá bài đã lật
   Dải holographic 7 màu phủ mặt lá theo góc ánh sáng
   ============================================================ */
@keyframes foilPos {
  0%   { background-position: 0%   50%; }
  25%  { background-position: 60%  20%; }
  50%  { background-position: 100% 80%; }
  75%  { background-position: 40%  100%; }
  100% { background-position: 0%   50%; }
}
@keyframes foilFade {
  0%,100% { opacity: .22; }
  35%     { opacity: .38; }
  65%     { opacity: .28; }
}
html:not([data-perf="low"]) .flip.turned .face.front {
  position: relative;
}
html:not([data-perf="low"]) .flip.turned .face.front .holo-foil {
  position: absolute; inset: 0; border-radius: inherit; z-index: 3;
  pointer-events: none; mix-blend-mode: color-dodge;
  background: linear-gradient(
    125deg,
    #ff6eb4 0%, #ff9d6f 10%,
    #ffe680 20%, #7ff7b0 30%,
    #5fb4ec 40%, #a78bfa 50%,
    #ff6eb4 60%, #ff9d6f 70%,
    #ffe680 80%, #7ff7b0 90%,
    #5fb4ec 100%
  );
  background-size: 400% 400%;
  animation: foilPos 5s ease-in-out infinite, foilFade 5s ease-in-out infinite;
  will-change: background-position, opacity;
}

/* ============================================================
   31. DEPTH FOG on reading table — bàn bài có sương mù
   Các lá ở rìa mờ hơn tạo cảm giác chiều sâu thật sự
   ============================================================ */
html:not([data-perf="low"]) .table::before {
  content: '';
  position: absolute; inset: 0; z-index: 20; pointer-events: none;
  background:
    radial-gradient(ellipse 100% 50% at 50% 100%, rgba(0,0,8,.55), transparent 60%),
    radial-gradient(ellipse 100% 30% at 50% 0%,   rgba(0,0,8,.35), transparent 70%);
}

/* ============================================================
   32. RESULT CARD ENTRANCE — siêu mượt khi lật xong
   Chi tiết lá bài bay vào từ phải
   ============================================================ */
@keyframes resultSlideIn {
  0%  {
    opacity: 0;
    transform: translateX(40px) scale(.95) rotateY(-8deg);
    filter: blur(4px);
  }
  60% { filter: blur(0); }
  100% {
    opacity: 1;
    transform: translateX(0) scale(1) rotateY(0);
    filter: none;
  }
}
html:not([data-perf="low"]) .detail-panel {
  animation: resultSlideIn .65s cubic-bezier(.22,.78,.28,1) !important;
}

/* ============================================================
   33. FLOATING PARTICLES AMBIENT — hạt sáng lơ lửng trong nền
   Tạo bởi JS (fx8d.js sparkleInject), CSS chỉ define keyframes
   ============================================================ */
@keyframes floatUp {
  0%   { transform: translateY(0) rotate(0);   opacity: 0; }
  10%  { opacity: var(--fp-max, .6); }
  90%  { opacity: var(--fp-max, .6); }
  100% { transform: translateY(var(--fp-h, -120px)) rotate(var(--fp-r, 45deg)); opacity: 0; }
}
.ambient-spark {
  position: fixed;
  width: var(--fp-s, 3px); height: var(--fp-s, 3px);
  border-radius: 50%;
  background: radial-gradient(circle, var(--fp-c, #5fb4ec), transparent);
  box-shadow: 0 0 var(--fp-glow, 6px) var(--fp-c, #5fb4ec);
  pointer-events: none; z-index: 0;
  animation: floatUp var(--fp-dur, 4s) ease-out forwards;
  will-change: transform, opacity;
}

/* ============================================================
   34. CARD BACK HYPNOTIC SPIRAL — xoáy tâm linh trên lưng lá
   ============================================================ */
@keyframes spiralSpin {
  to { transform: rotate(360deg); }
}
html:not([data-perf="low"]) .card-back .back-spiral {
  position: absolute; inset: 0; border-radius: inherit;
  display: grid; place-items: center;
  overflow: hidden; pointer-events: none;
}
html:not([data-perf="low"]) .card-back .back-spiral::before {
  content: '';
  width: 200%; height: 200%;
  background: conic-gradient(from 0deg,
    transparent 0deg 60deg,
    rgba(95,180,236,.06) 60deg 90deg,
    transparent 90deg 150deg,
    rgba(184,127,255,.05) 150deg 180deg,
    transparent 180deg 240deg,
    rgba(127,247,176,.04) 240deg 270deg,
    transparent 270deg 330deg,
    rgba(95,180,236,.05) 330deg 360deg
  );
  animation: spiralSpin 20s linear infinite;
  will-change: transform;
}

/* ============================================================
   35. STAGGER FADE-IN — trang chủ tool cards xuất hiện đẹp
   ============================================================ */
@keyframes toolCardIn {
  0%  { opacity: 0; transform: translateY(24px) scale(.96); }
  100%{ opacity: 1; transform: translateY(0)    scale(1);   }
}
html:not([data-perf="low"]) .tools-grid .tool,
html:not([data-perf="low"]) .card-grid .card-item {
  animation: toolCardIn .5s cubic-bezier(.22,.78,.28,1) backwards;
}
html:not([data-perf="low"]) .tools-grid .tool:nth-child(1)  { animation-delay: .06s; }
html:not([data-perf="low"]) .tools-grid .tool:nth-child(2)  { animation-delay: .12s; }
html:not([data-perf="low"]) .tools-grid .tool:nth-child(3)  { animation-delay: .18s; }
html:not([data-perf="low"]) .tools-grid .tool:nth-child(4)  { animation-delay: .24s; }
html:not([data-perf="low"]) .tools-grid .tool:nth-child(5)  { animation-delay: .30s; }
html:not([data-perf="low"]) .tools-grid .tool:nth-child(6)  { animation-delay: .36s; }
html:not([data-perf="low"]) .tools-grid .tool:nth-child(7)  { animation-delay: .42s; }
html:not([data-perf="low"]) .tools-grid .tool:nth-child(8)  { animation-delay: .48s; }

/* ============================================================
   36. GLASS MORPHISM CARDS — hiệu ứng kính sữa siêu đẹp
   Áp dụng cho tool cards, result panels
   ============================================================ */
html:not([data-perf="low"]) .tool,
html:not([data-perf="low"]) .result-card {
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  position: relative; overflow: hidden;
}
/* Shine border highlight */
html:not([data-perf="low"]) .tool::before,
html:not([data-perf="low"]) .result-card::before {
  content: '';
  position: absolute; inset: 0; border-radius: inherit; z-index: 0;
  background: linear-gradient(135deg,
    rgba(255,255,255,.08) 0%,
    transparent 40%,
    rgba(255,255,255,.04) 100%);
  pointer-events: none;
}

/* ============================================================
   37. INTERACTIVE HOVER — tool cards nổi lên 3D khi hover
   ============================================================ */
html:not([data-perf="low"]) .tool {
  transition:
    transform .25s cubic-bezier(.22,.78,.28,1),
    box-shadow .25s ease,
    filter .2s ease !important;
  will-change: transform;
}
html:not([data-perf="low"]) .tool:hover {
  transform: translateY(-8px) scale(1.03) rotateX(-3deg) !important;
  box-shadow:
    0 24px 60px rgba(0,0,0,.5),
    0 0 30px color-mix(in srgb, var(--topic-accent, var(--moon)) 30%, transparent),
    0 0 1px rgba(255,255,255,.15) !important;
  filter: brightness(1.08) !important;
}

/* ============================================================
   38. MOBILE TOUCH RIPPLE — khi chạm vào bài trên điện thoại
   ============================================================ */
@keyframes touchRipple {
  0%   { transform: translate(-50%,-50%) scale(0); opacity: .7; }
  100% { transform: translate(-50%,-50%) scale(3); opacity: 0;  }
}
.touch-ripple {
  position: fixed; width: 50px; height: 50px; border-radius: 50%;
  background: radial-gradient(circle,
    color-mix(in srgb, var(--topic-accent, var(--moon)) 60%, transparent),
    transparent 70%);
  pointer-events: none; z-index: 9997;
  animation: touchRipple .5s ease-out forwards;
  will-change: transform, opacity;
}

/* ============================================================
   39. HEADER GLASS — thanh nav trong suốt đẹp
   ============================================================ */
html:not([data-perf="low"]) #site-head {
  backdrop-filter: blur(20px) saturate(1.6) brightness(.85);
  -webkit-backdrop-filter: blur(20px) saturate(1.6) brightness(.85);
  border-bottom: 1px solid rgba(95,180,236,.12);
  box-shadow: 0 1px 40px rgba(0,0,8,.4);
}

/* ============================================================
   40. NEON SCROLL INDICATOR — thanh cuộn phát sáng
   ============================================================ */
html:not([data-perf="low"]) ::-webkit-scrollbar {
  width: 5px; background: rgba(0,0,8,.8);
}
html:not([data-perf="low"]) ::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg,
    var(--topic-accent, var(--moon)),
    var(--blossom),
    var(--topic-accent, var(--moon)));
  border-radius: 10px;
  box-shadow: 0 0 8px var(--topic-accent, var(--moon));
}