/* ==========================================================================
   NOIR 2.0 — Conan School theme kit
   Một nguồn sáng, bóng đen đặc, viền hổ phách, hẻm đêm, mưa.
   ========================================================================== */

html[data-kit] {
  /* Màu gốc */
  --ink: #08080a;          /* mực đêm */
  --ink-2: #0e0e12;        /* nền trang */
  --coal: #141418;         /* than chì: thẻ */
  --coal-2: #1b1b21;       /* than nổi: thẻ nổi, input */
  --coal-3: #26262e;       /* viền, đường chia */
  --smoke: #8c8a84;        /* chữ phụ */
  --ivory: #ede6d6;        /* ngà màn bạc */
  --ivory-dim: #b9b2a3;
  --amber: #f2a93b;        /* đèn đường */
  --amber-hi: #ffc66b;
  --amber-lo: #b8761a;
  --amber-ink: #2a1a04;    /* chữ trên nền hổ phách */
  --neon: #ff3d4a;
  --neon-lo: #a3142a;
  --rain: #8c93a3;
  --ok: #7fc8a0;           /* chỉ dùng trong trạng thái đúng, rất tiết chế */

  --amber-glow: 242 169 59;
  --neon-glow: 255 61 74;

  /* Chữ */
  /* Bảng đen thẻ phim (tiêu đề), giọng kể nghiêng (lời dẫn, trích), chữ máy hồ sơ (số, mã hồ sơ) */
  --f-display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --f-voice: "Newsreader", Georgia, serif;
  --f-body: "Be Vietnam Pro", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, monospace;

  --t-xs: 0.75rem;
  --t-sm: 0.875rem;
  --t-md: 1rem;
  --t-lg: 1.25rem;
  --t-xl: 1.75rem;
  --t-2xl: 2.5rem;
  --t-3xl: clamp(3rem, 6.5vw, 5.5rem);
  --t-hero: clamp(3.75rem, 10vw, 8.75rem);

  /* Hình */
  --r-1: 2px;
  --r-2: 4px;
  --r-pill: 999px;
  --blind-angle: 24deg;

  /* Chuyển động */
  --ease-film: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --d-fast: 160ms;
  --d-mid: 320ms;
  --d-slow: 560ms;

  --shadow-deep: 0 1px 0 rgb(255 255 255 / 0.04) inset, 0 24px 48px -24px rgb(0 0 0 / 0.9);
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .55 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");

  --ink-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='m'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.6' numOctaves='3' seed='4' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -4 0 0 0 3.7'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23m)'/%3E%3C/svg%3E");

  color-scheme: dark;
}

html[data-kit] [data-palette="rouge"] {
  --amber: #e8b04a; --amber-hi: #ffd27e; --amber-lo: #9c6a17;
  --coal: #161214; --coal-2: #1f181b; --coal-3: #2e2428; --ink-2: #0f0b0d;
  --neon: #ff2d55;
}
html[data-kit] [data-palette="teal"] {
  --ink: #050b0d; --ink-2: #081215; --coal: #0e1a1d; --coal-2: #142327; --coal-3: #1f3337;
  --rain: #9fb7bf; --smoke: #7f918f;
}

/* -------------------------------------------------------------------------- */
/* Nền                                                                         */
/* -------------------------------------------------------------------------- */
html[data-kit] *, html[data-kit] *::before, html[data-kit] *::after { box-sizing: border-box; }
html[data-kit] { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html[data-kit] body {
  margin: 0;
  background: var(--ink-2);
  color: var(--ivory);
  font-family: var(--f-body);
  font-size: var(--t-md);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
html[data-kit] body.nr-grain::after {
  content: ""; position: fixed; inset: -50%; z-index: 9990; pointer-events: none;
  background-image: var(--grain); opacity: 0.07; mix-blend-mode: overlay;
  animation: nr-grain 0.9s steps(4) infinite;
}
@keyframes nr-grain {
  0% { transform: translate(0, 0); } 25% { transform: translate(-3%, 2%); }
  50% { transform: translate(2%, -3%); } 75% { transform: translate(-1%, -1%); }
}
html[data-kit] img, html[data-kit] svg, html[data-kit] canvas { display: block; max-width: 100%; }
html[data-kit] a { color: inherit; }
html[data-kit] ::selection { background: var(--amber); color: var(--amber-ink); }
html[data-kit] :focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; border-radius: var(--r-1); }

html[data-kit] .nr-wrap { width: min(1200px, 100% - 32px); margin-inline: auto; }
html[data-kit] .nr-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* -------------------------------------------------------------------------- */
/* Chữ                                                                          */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-display, html[data-kit] h1.nr, html[data-kit] h2.nr, html[data-kit] h3.nr {
  font-family: var(--f-display); font-weight: 800; text-transform: uppercase;
  letter-spacing: 0.005em; line-height: 0.98; margin: 0; text-wrap: balance;
  font-kerning: normal;
}
html[data-kit] .nr-hero-title { font-size: var(--t-hero); font-weight: 900; line-height: 1; letter-spacing: -0.005em; }
html[data-kit] .nr-h1 { font-size: var(--t-3xl); }
html[data-kit] .nr-h2 { font-size: var(--t-2xl); line-height: 1; }
html[data-kit] .nr-h3 { font-family: var(--f-display); font-size: var(--t-xl); font-weight: 700; text-transform: uppercase; letter-spacing: 0.02em; line-height: 1; margin: 0; }
/* Lời dẫn: giọng người kể chuyện, serif nghiêng, chỉ dùng từ 20px trở lên */
html[data-kit] .nr-lead { font-family: var(--f-voice); font-style: normal; font-weight: 400; font-optical-sizing: auto; font-size: clamp(1.2rem, 1.05rem + 0.5vw, 1.5rem); line-height: 1.5; color: var(--ivory-dim); max-width: 46ch; margin: 0; }
html[data-kit] .nr-voice { font-family: var(--f-voice); font-style: normal; font-weight: 500; font-optical-sizing: auto; font-size: max(1.15rem, 1em); line-height: 1.45; }
html[data-kit] .nr-body { color: var(--ivory-dim); max-width: 66ch; }
html[data-kit] .nr-small { font-size: var(--t-sm); color: var(--smoke); }
/* Mã hồ sơ: chữ máy đánh, có số thứ tự thật của vụ án */
html[data-kit] .nr-file {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--f-mono); font-weight: 500; font-size: 0.8125rem;
  letter-spacing: 0.02em; color: var(--amber);
}
html[data-kit] .nr-file::before { content: ""; width: 18px; height: 1px; background: currentColor; }
html[data-kit] .nr-num { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
html[data-kit] .nr-lit-text { color: var(--amber); text-shadow: 0 0 24px rgb(var(--amber-glow) / 0.35); }
/* Biển neon: nhấp nháy lúc bật điện rồi đứng yên */
html[data-kit] .nr-neon-text {
  color: #ffd9dc;
  text-shadow: 0 0 2px #fff, 0 0 8px var(--neon), 0 0 22px var(--neon), 0 0 46px rgb(var(--neon-glow) / 0.6);
  animation: nr-neon 1.4s steps(1, end) 0.3s both;
}
@keyframes nr-neon {
  0% { opacity: 0.12; text-shadow: none; }
  8% { opacity: 1; } 12% { opacity: 0.2; text-shadow: none; } 18% { opacity: 1; }
  40% { opacity: 0.45; } 44%, 100% { opacity: 1; }
}

/* -------------------------------------------------------------------------- */
/* Hiệu ứng chữ                                                                 */
/* -------------------------------------------------------------------------- */
/* Thớ mực: tiêu đề lớn có vân in, không phẳng như chữ số */
/* Dấu tiếng Việt cao hơn chữ hoa: chừa đệm trên để mặt nạ và bộ lọc không cắt mất dấu */
html[data-kit] .nr-inked, html[data-kit] .nr-boil { padding-top: 0.32em; margin-top: -0.32em; }
html[data-kit] .nr-inked { -webkit-mask-image: var(--ink-mask); mask-image: var(--ink-mask); -webkit-mask-size: 240px; mask-size: 240px; }

/* Thẻ tựa phim: từng dòng trồi lên qua khe, rồi một luồng đèn quét qua đúng một lần */
html[data-kit] .nr-titlecard .nr-tl { display: block; overflow: clip; padding-top: 0.32em; margin-top: -0.32em; padding-bottom: 0.08em; margin-bottom: -0.08em; }
/* nền quét đèn phải phủ cả phần dấu nằm trên hộp chữ */
html[data-kit] .nr-titlecard .nr-tl > span { display: block; padding-top: 0.32em; margin-top: -0.32em; transform: translateY(130%); }
html[data-kit] .nr-titlecard.is-in .nr-tl > span { transform: none; transition: transform 900ms var(--ease-out); transition-delay: calc(var(--i) * 110ms + 80ms); }
html[data-kit] .nr-titlecard.is-in .nr-tl > span {
  background: linear-gradient(100deg, var(--ivory) 40%, #fff6dc 47%, var(--amber-hi) 50%, #fff6dc 53%, var(--ivory) 60%) 100% 0 / 300% 100% no-repeat;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: nr-sweep 1.6s var(--ease-film) both; animation-delay: calc(var(--i) * 110ms + 700ms);
}
@keyframes nr-sweep { from { background-position: 100% 0; } to { background-position: 0% 0; } }

/* Chữ sôi mực: viền chữ rung nhẹ 8 lần/giây như vẽ tay (bộ lọc nạp từ noir-fx.js) */
html[data-kit] .nr-boil { filter: url(#nr-boil); }

/* Bút xoá: vạch mực đen che chữ, rút đi để lộ manh mối */
html[data-kit] .nr-redact { position: relative; color: var(--amber-hi); white-space: nowrap; }
html[data-kit] .nr-redact::after {
  content: ""; position: absolute; inset: 0.08em -0.12em 0.02em; background: #050506;
  border-radius: 1px 3px 2px 1px; box-shadow: 0 0 0 1px rgb(237 230 214 / 0.06);
  transform-origin: right; transition: transform 700ms var(--ease-film);
  -webkit-mask-image: var(--ink-mask); mask-image: var(--ink-mask); -webkit-mask-size: 120px; mask-size: 120px;
}
html[data-kit] .nr-redact.is-out::after { transform: scaleX(0); }

/* Máy đánh chữ: gõ một lần, con trỏ chớp ba nhịp rồi tắt */
html[data-kit] .nr-typewriter { font-family: var(--f-mono); }
html[data-kit] .nr-typewriter .nr-caret { display: inline-block; width: 0.55em; height: 1.05em; margin-left: 1px; vertical-align: -0.15em; background: var(--amber); animation: nr-caret 0.5s steps(1) 6 both; }
html[data-kit] .nr-typewriter.is-done .nr-caret { opacity: 0; }
@keyframes nr-caret { 50% { opacity: 0; } }

/* Con dấu: ấn xuống, nảy nhẹ, để lại vết mực */
html[data-kit] .nr-stamp-in { animation: nr-stamp-in 520ms var(--ease-spring) both; }
@keyframes nr-stamp-in {
  0% { opacity: 0; transform: rotate(-8deg) scale(2.2); filter: blur(2px); }
  55% { opacity: 1; transform: rotate(-8deg) scale(0.94); filter: none; }
  100% { transform: rotate(-8deg) scale(1); }
}

/* -------------------------------------------------------------------------- */
/* NÚT                                                                          */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-btn {
  --h: 48px;
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: var(--h); padding: 0 22px;
  font: 600 var(--t-md)/1 var(--f-body); letter-spacing: 0.01em; text-decoration: none;
  border: 0; border-radius: var(--r-2); cursor: pointer; white-space: nowrap;
  transition: transform var(--d-fast) var(--ease-out), box-shadow var(--d-mid) var(--ease-out),
              background-color var(--d-mid), color var(--d-mid), border-color var(--d-mid);
  -webkit-tap-highlight-color: transparent; user-select: none;
}
html[data-kit] .nr-btn > * { position: relative; z-index: 2; }
html[data-kit] .nr-btn .nr-btn-ico { width: 20px; height: 20px; flex: none; transition: transform var(--d-mid) var(--ease-spring); }
html[data-kit] .nr-btn:hover .nr-btn-ico--go { transform: translateX(4px); }
html[data-kit] .nr-btn--sm { --h: 38px; padding: 0 14px; font-size: var(--t-sm); }
html[data-kit] .nr-btn--lg { --h: 58px; padding: 0 30px; font-size: 1.0625rem; }
html[data-kit] .nr-btn--block { width: 100%; }

/* Đèn (primary): khối hổ phách có gờ đáy, bấm thì lún, hover có vệt sáng quét chéo */
html[data-kit] .nr-btn--lamp {
  background: linear-gradient(180deg, var(--amber-hi) 0%, var(--amber) 42%, #e2952a 100%);
  color: var(--amber-ink);
  box-shadow: 0 1px 0 rgb(255 255 255 / 0.55) inset, 0 -2px 0 rgb(0 0 0 / 0.18) inset,
              0 3px 0 var(--amber-lo), 0 10px 30px -8px rgb(var(--amber-glow) / 0.55);
}
html[data-kit] .nr-btn--lamp::before {
  content: ""; position: absolute; z-index: 1; inset: -20% auto -20% -60%; width: 46%;
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / 0.55), transparent);
  transform: skewX(calc(-1 * var(--blind-angle))); transition: none; pointer-events: none;
}
html[data-kit] .nr-btn--lamp::after {
  content: ""; position: absolute; z-index: -1; inset: -40%;
  background: radial-gradient(closest-side, rgb(var(--amber-glow) / 0.45), transparent);
  opacity: 0; transition: opacity var(--d-mid);
}
html[data-kit] .nr-btn--lamp:hover { transform: translateY(-1px); box-shadow: 0 1px 0 rgb(255 255 255 / 0.6) inset, 0 -2px 0 rgb(0 0 0 / 0.18) inset, 0 4px 0 var(--amber-lo), 0 16px 44px -8px rgb(var(--amber-glow) / 0.75); }
html[data-kit] .nr-btn--lamp:hover::before { left: 120%; transition: left 700ms var(--ease-film); }
html[data-kit] .nr-btn--lamp:active { transform: translateY(3px); box-shadow: 0 1px 0 rgb(255 255 255 / 0.4) inset, 0 0 0 var(--amber-lo), 0 4px 14px -6px rgb(var(--amber-glow) / 0.6); }

/* Bóng (secondary): viền ngà mảnh, hover thì đèn bật từ trái */
html[data-kit] .nr-btn--ghost {
  background: transparent; color: var(--ivory);
  box-shadow: inset 0 0 0 1px rgb(237 230 214 / 0.28);
}
html[data-kit] .nr-btn--ghost::before {
  content: ""; position: absolute; z-index: 1; inset: 0;
  background: linear-gradient(calc(90deg + var(--blind-angle)), rgb(237 230 214 / 0.1), rgb(237 230 214 / 0.03));
  clip-path: polygon(0 0, 0 0, -30% 100%, -30% 100%);
  transition: clip-path var(--d-slow) var(--ease-film);
}
html[data-kit] .nr-btn--ghost:hover { box-shadow: inset 0 0 0 1px rgb(237 230 214 / 0.6); }
html[data-kit] .nr-btn--ghost:hover::before { clip-path: polygon(0 0, 130% 0, 100% 100%, -30% 100%); }
html[data-kit] .nr-btn--ghost:active { transform: translateY(1px) scale(0.99); }

/* Than (tertiary trên nền tối) */
html[data-kit] .nr-btn--coal {
  background: var(--coal-2); color: var(--ivory);
  box-shadow: 0 1px 0 rgb(255 255 255 / 0.06) inset, 0 3px 0 #000, 0 0 0 1px var(--coal-3);
}
html[data-kit] .nr-btn--coal:hover { background: #22222a; }
html[data-kit] .nr-btn--coal:active { transform: translateY(3px); box-shadow: 0 1px 0 rgb(255 255 255 / 0.06) inset, 0 0 0 #000, 0 0 0 1px var(--coal-3); }

/* Neon: chỉ cho khoảnh khắc biển hiệu/thương hiệu, tối đa một nút mỗi trang */
html[data-kit] .nr-btn--neon {
  background: rgb(var(--neon-glow) / 0.06); color: #ffe3e5;
  box-shadow: inset 0 0 0 1.5px var(--neon), 0 0 18px -2px rgb(var(--neon-glow) / 0.55), inset 0 0 16px -4px rgb(var(--neon-glow) / 0.6);
  text-shadow: 0 0 10px rgb(var(--neon-glow) / 0.8);
}
html[data-kit] .nr-btn--neon:hover { animation: nr-neon-btn 1.1s steps(1) 1; background: rgb(var(--neon-glow) / 0.14); }
@keyframes nr-neon-btn { 0%, 100% { opacity: 1; } 10% { opacity: 0.4; } 16% { opacity: 1; } 22% { opacity: 0.6; } 30% { opacity: 1; } }

/* Chữ (link button) */
html[data-kit] .nr-btn--text { background: none; height: auto; padding: 4px 0; color: var(--ivory); border-radius: 0; }
html[data-kit] .nr-btn--text::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--amber);
  transform: scaleX(0.25); transform-origin: left; transition: transform var(--d-mid) var(--ease-film);
}
html[data-kit] .nr-btn--text:hover { color: var(--amber); }
html[data-kit] .nr-btn--text:hover::after { transform: scaleX(1); }

/* Nút icon tròn */
html[data-kit] .nr-btn--icon { --h: 44px; width: var(--h); padding: 0; border-radius: 50%; background: var(--coal-2); color: var(--ivory); box-shadow: inset 0 0 0 1px var(--coal-3); }
html[data-kit] .nr-btn--icon:hover { color: var(--amber); box-shadow: inset 0 0 0 1px rgb(var(--amber-glow) / 0.5), 0 0 24px -6px rgb(var(--amber-glow) / 0.6); }

html[data-kit] .nr-btn[disabled], html[data-kit] .nr-btn[aria-disabled="true"] { cursor: not-allowed; filter: grayscale(1) brightness(0.55); transform: none !important; }

/* Trạng thái: đang tải (dây tóc bóng đèn) và đã xong */
html[data-kit] .nr-btn.is-loading { pointer-events: none; color: transparent !important; }
html[data-kit] .nr-btn.is-loading > * { opacity: 0; }
html[data-kit] .nr-btn.is-loading::after {
  content: ""; position: absolute; z-index: 3; inset: auto; left: 50%; top: 50%; width: 46px; height: 6px; margin: -3px 0 0 -23px;
  opacity: 1; border-radius: 3px; background: linear-gradient(90deg, transparent, var(--amber-ink), transparent);
  background-size: 200% 100%; animation: nr-filament 900ms linear infinite;
}
html[data-kit] .nr-btn--ghost.is-loading::after, html[data-kit] .nr-btn--coal.is-loading::after { background-image: linear-gradient(90deg, transparent, var(--amber), transparent); }
@keyframes nr-filament { from { background-position: 100% 0; } to { background-position: -100% 0; } }
html[data-kit] .nr-btn.is-done { pointer-events: none; }
html[data-kit] .nr-btn .nr-btn-done { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0; transform: scale(0.6); transition: all var(--d-mid) var(--ease-spring); }
html[data-kit] .nr-btn.is-done > :not(.nr-btn-done) { opacity: 0; transform: translateY(-8px); transition: all var(--d-fast); }
html[data-kit] .nr-btn.is-done .nr-btn-done { opacity: 1; transform: none; }

/* -------------------------------------------------------------------------- */
/* HỒ SƠ (card) với đèn pin: viền và nền sáng theo vị trí con trỏ               */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-case {
  --mx: 50%; --my: -30%;
  position: relative; isolation: isolate;
  background: linear-gradient(180deg, #17171c, var(--coal));
  border-radius: var(--r-2);
  padding: 24px;
  box-shadow: var(--shadow-deep);
}
html[data-kit] .nr-case::before { /* viền sáng theo đèn pin */
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit; padding: 1px;
  background: radial-gradient(260px circle at var(--mx) var(--my), rgb(var(--amber-glow) / 0.85), rgb(237 230 214 / 0.1) 45%, rgb(237 230 214 / 0.06));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
html[data-kit] .nr-case::after { /* quầng sáng trong lòng thẻ */
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgb(var(--amber-glow) / 0.08), transparent 60%);
  opacity: 0; transition: opacity var(--d-mid);
}
html[data-kit] .nr-case:hover::after, html[data-kit] .nr-case:focus-within::after { opacity: 1; }
html[data-kit] .nr-case--link { cursor: pointer; transition: transform var(--d-mid) var(--ease-out); }
html[data-kit] .nr-case--link:hover { transform: translateY(-3px); }
html[data-kit] .nr-case--featured { background: linear-gradient(180deg, #1d1a14, #141310); }
html[data-kit] .nr-case--featured::before { background: radial-gradient(320px circle at var(--mx) var(--my), var(--amber-hi), rgb(var(--amber-glow) / 0.45) 50%, rgb(var(--amber-glow) / 0.25)); }

/* Mép bìa hồ sơ: tab nhỏ phía trên chứa số hồ sơ */
html[data-kit] .nr-case-tab {
  position: absolute; top: -11px; left: 20px; padding: 3px 10px; border-radius: var(--r-1);
  background: var(--coal-2); box-shadow: inset 0 0 0 1px var(--coal-3);
  font: 600 0.6875rem/1.4 var(--f-mono); letter-spacing: 0.08em; color: var(--amber);
}

/* -------------------------------------------------------------------------- */
/* HỘP THÔNG TIN (callout)                                                      */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-note {
  --tone: var(--amber); --tone-rgb: var(--amber-glow);
  position: relative; display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: start;
  padding: 16px 18px 16px 16px; border-radius: var(--r-2);
  background:
    linear-gradient(90deg, rgb(var(--tone-rgb) / 0.10), rgb(var(--tone-rgb) / 0.02) 55%),
    var(--coal);
  box-shadow: inset 0 0 0 1px rgb(var(--tone-rgb) / 0.22);
  overflow: hidden;
}
html[data-kit] .nr-note::before { /* dải đèn bên trái */
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--tone); box-shadow: 0 0 16px 1px rgb(var(--tone-rgb) / 0.8);
}
html[data-kit] .nr-note::after { /* quầng đèn hắt từ dải bên trái */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 120% at 0 50%, rgb(var(--tone-rgb) / 0.10), transparent 70%);
}
html[data-kit] .nr-note > * { position: relative; z-index: 1; }
html[data-kit] .nr-note-ico { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; color: var(--tone); background: rgb(var(--tone-rgb) / 0.12); }
html[data-kit] .nr-note-ico svg { width: 22px; height: 22px; }
html[data-kit] .nr-note-title { font-weight: 700; font-size: var(--t-md); margin: 0 0 2px; color: var(--ivory); }
html[data-kit] .nr-note-text { margin: 0; color: var(--ivory-dim); font-size: 0.9375rem; }
html[data-kit] .nr-note-close { background: none; border: 0; color: var(--smoke); cursor: pointer; padding: 4px; border-radius: 50%; line-height: 0; }
html[data-kit] .nr-note-close:hover { color: var(--ivory); background: rgb(255 255 255 / 0.06); }
html[data-kit] .nr-note--warn { --tone: var(--neon); --tone-rgb: var(--neon-glow); }
html[data-kit] .nr-note--memo { --tone: var(--ivory); --tone-rgb: 237 230 214; }
html[data-kit] .nr-note--ok { --tone: var(--ok); --tone-rgb: 127 200 160; }
html[data-kit] .nr-note--rain { --tone: var(--rain); --tone-rgb: 140 147 163; }
html[data-kit] .nr-note.is-entering { animation: nr-note-in var(--d-slow) var(--ease-out) both; }
@keyframes nr-note-in { from { opacity: 0; transform: translateY(8px); clip-path: inset(0 100% 0 0); } to { opacity: 1; transform: none; clip-path: inset(0 0 0 0); } }

/* Hộp lời nhân vật: nhân vật nhỏ + bóng thoại */
html[data-kit] .nr-says { display: grid; grid-template-columns: 76px 1fr; gap: 12px; align-items: end; }
html[data-kit] .nr-says noir-character { width: 76px; height: 76px; }
html[data-kit] .nr-bubble {
  position: relative; padding: 14px 16px; border-radius: 4px 4px 4px 0;
  background: var(--coal-2); box-shadow: inset 0 0 0 1px var(--coal-3); color: var(--ivory);
}
html[data-kit] .nr-bubble::before { content: ""; position: absolute; left: -8px; bottom: 0; border: 8px solid transparent; border-right-color: var(--coal-2); border-bottom-color: var(--coal-2); border-width: 0 8px 8px 0; }
html[data-kit] .nr-bubble b { color: var(--amber); font-weight: 600; }

/* -------------------------------------------------------------------------- */
/* Badge, chip, tag                                                             */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-badge {
  display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 9px;
  border-radius: var(--r-1); font: 600 0.75rem/1 var(--f-body); letter-spacing: 0.02em;
  background: rgb(237 230 214 / 0.07); color: var(--ivory-dim); box-shadow: inset 0 0 0 1px rgb(237 230 214 / 0.1);
}
html[data-kit] .nr-badge--lit { background: rgb(var(--amber-glow) / 0.14); color: var(--amber-hi); box-shadow: inset 0 0 0 1px rgb(var(--amber-glow) / 0.35); }
html[data-kit] .nr-badge--neon { background: rgb(var(--neon-glow) / 0.12); color: #ffb3b9; box-shadow: inset 0 0 0 1px rgb(var(--neon-glow) / 0.4); }
html[data-kit] .nr-badge--solid { background: var(--amber); color: var(--amber-ink); box-shadow: none; }
html[data-kit] .nr-badge .nr-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 8px currentColor; }
html[data-kit] .nr-badge .nr-dot--live { animation: nr-pulse 1.6s ease-in-out infinite; }
@keyframes nr-pulse { 50% { opacity: 0.3; } }

html[data-kit] .nr-chip {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 10px 18px;
  border-radius: var(--r-pill); border: 0; cursor: pointer; font: 500 0.9375rem/1.2 var(--f-body);
  background: var(--coal-2); color: var(--ivory); box-shadow: inset 0 0 0 1px var(--coal-3), 0 3px 0 #000;
  transition: all var(--d-fast) var(--ease-out);
}
html[data-kit] .nr-chip:hover { box-shadow: inset 0 0 0 1px rgb(237 230 214 / 0.3), 0 3px 0 #000; }
html[data-kit] .nr-chip:active { transform: translateY(3px); box-shadow: inset 0 0 0 1px var(--coal-3), 0 0 0 #000; }
html[data-kit] .nr-chip[aria-pressed="true"], html[data-kit] .nr-chip.is-on {
  background: rgb(var(--amber-glow) / 0.12); color: var(--amber-hi);
  box-shadow: inset 0 0 0 1.5px var(--amber), 0 3px 0 var(--amber-lo), 0 0 26px -8px rgb(var(--amber-glow) / 0.8);
}

/* -------------------------------------------------------------------------- */
/* Form                                                                         */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-field { display: grid; gap: 8px; }
html[data-kit] .nr-label { font-size: var(--t-sm); font-weight: 600; color: var(--ivory); }
html[data-kit] .nr-hint { font-size: 0.8125rem; color: var(--smoke); }
html[data-kit] .nr-input, html[data-kit] .nr-select, html[data-kit] .nr-textarea {
  width: 100%; height: 50px; padding: 0 16px; border: 0; border-radius: var(--r-2);
  background: var(--coal-2); color: var(--ivory); font: 400 var(--t-md)/1.4 var(--f-body);
  box-shadow: inset 0 0 0 1px var(--coal-3), inset 0 2px 6px rgb(0 0 0 / 0.4);
  transition: box-shadow var(--d-mid), background-color var(--d-mid);
}
html[data-kit] .nr-textarea { height: auto; min-height: 120px; padding: 14px 16px; resize: vertical; }
html[data-kit] .nr-input::placeholder, html[data-kit] .nr-textarea::placeholder { color: #6c6a66; }
html[data-kit] .nr-input:hover, html[data-kit] .nr-textarea:hover { box-shadow: inset 0 0 0 1px #3a3a44, inset 0 2px 6px rgb(0 0 0 / 0.4); }
html[data-kit] .nr-input:focus, html[data-kit] .nr-select:focus, html[data-kit] .nr-textarea:focus {
  outline: none; background: #1f1d1a;
  box-shadow: inset 0 0 0 1.5px var(--amber), 0 0 0 4px rgb(var(--amber-glow) / 0.14), 0 0 30px -6px rgb(var(--amber-glow) / 0.45);
}
html[data-kit] .nr-field.is-error .nr-input, html[data-kit] .nr-field.is-error .nr-textarea { box-shadow: inset 0 0 0 1.5px var(--neon), 0 0 0 4px rgb(var(--neon-glow) / 0.12); animation: nr-shake 360ms; }
html[data-kit] .nr-field.is-error .nr-hint { color: #ff8a93; }
@keyframes nr-shake { 20%, 60% { transform: translateX(-5px); } 40%, 80% { transform: translateX(5px); } }
html[data-kit] .nr-input-wrap { position: relative; }
html[data-kit] .nr-input-wrap .nr-input { padding-left: 46px; }
html[data-kit] .nr-input-wrap > :is(svg, noir-icon) { position: absolute; left: 14px; top: 50%; width: 20px; height: 20px; transform: translateY(-50%); color: var(--smoke); pointer-events: none; transition: color var(--d-mid); }
html[data-kit] .nr-input-wrap:focus-within > :is(svg, noir-icon) { color: var(--amber); }

/* Công tắc đèn */
html[data-kit] .nr-switch { position: relative; display: inline-flex; align-items: center; gap: 12px; cursor: pointer; font-size: var(--t-sm); }
html[data-kit] .nr-switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
html[data-kit] .nr-switch-track { width: 46px; height: 26px; border-radius: 13px; background: var(--coal-3); box-shadow: inset 0 2px 4px rgb(0 0 0 / 0.6); position: relative; transition: background var(--d-mid); flex: none; }
html[data-kit] .nr-switch-track::after { content: ""; position: absolute; left: 3px; top: 3px; width: 20px; height: 20px; border-radius: 50%; background: #5d5b57; transition: all var(--d-mid) var(--ease-spring); }
html[data-kit] .nr-switch input:checked + .nr-switch-track { background: rgb(var(--amber-glow) / 0.3); }
html[data-kit] .nr-switch input:checked + .nr-switch-track::after { left: 23px; background: var(--amber-hi); box-shadow: 0 0 14px 2px rgb(var(--amber-glow) / 0.8); }
html[data-kit] .nr-switch input:focus-visible + .nr-switch-track { outline: 2px solid var(--amber); outline-offset: 3px; }

/* Lựa chọn đáp án (kiểu Brilliant) */
html[data-kit] .nr-option {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left; padding: 16px 18px;
  border: 0; border-radius: var(--r-2); cursor: pointer; font: 500 var(--t-md)/1.4 var(--f-body);
  background: var(--coal); color: var(--ivory); box-shadow: inset 0 0 0 1.5px var(--coal-3), 0 3px 0 #000;
  transition: all var(--d-fast) var(--ease-out);
}
html[data-kit] .nr-option:hover { box-shadow: inset 0 0 0 1.5px #44444e, 0 3px 0 #000; }
html[data-kit] .nr-option:active { transform: translateY(3px); box-shadow: inset 0 0 0 1.5px var(--coal-3), 0 0 0 #000; }
html[data-kit] .nr-option-key { width: 28px; height: 28px; flex: none; display: grid; place-items: center; border-radius: var(--r-1); font: 700 0.8125rem/1 var(--f-mono); color: var(--smoke); box-shadow: inset 0 0 0 1px var(--coal-3); }
html[data-kit] .nr-option[aria-checked="true"] { background: #1e1a12; box-shadow: inset 0 0 0 2px var(--amber), 0 3px 0 var(--amber-lo); }
html[data-kit] .nr-option[aria-checked="true"] .nr-option-key { background: var(--amber); color: var(--amber-ink); box-shadow: none; }
html[data-kit] .nr-option.is-right { background: #12201a; box-shadow: inset 0 0 0 2px var(--ok), 0 3px 0 #2f5a43; }
html[data-kit] .nr-option.is-wrong { background: #221215; box-shadow: inset 0 0 0 2px var(--neon), 0 3px 0 var(--neon-lo); animation: nr-shake 360ms; }

/* -------------------------------------------------------------------------- */
/* Tabs với dải đèn trượt                                                       */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-tabs { position: relative; display: inline-flex; gap: 4px; padding: 4px; border-radius: var(--r-2); background: var(--coal); box-shadow: inset 0 0 0 1px var(--coal-3); max-width: 100%; overflow-x: auto; scrollbar-width: none; }
html[data-kit] .nr-tab { position: relative; z-index: 1; height: 38px; padding: 0 16px; border: 0; background: none; color: var(--smoke); font: 500 var(--t-sm)/1 var(--f-body); cursor: pointer; border-radius: var(--r-1); white-space: nowrap; transition: color var(--d-mid); }
html[data-kit] .nr-tab:hover { color: var(--ivory); }
html[data-kit] .nr-tab[aria-selected="true"] { color: var(--amber-ink); }
html[data-kit] .nr-tabs-light { position: absolute; z-index: 0; top: 4px; bottom: 4px; left: 0; width: 0; border-radius: var(--r-1); background: var(--amber); box-shadow: 0 0 22px -4px rgb(var(--amber-glow) / 0.8); transition: all var(--d-mid) var(--ease-out); }

/* -------------------------------------------------------------------------- */
/* Tiến độ                                                                      */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-progress { position: relative; height: 10px; border-radius: 5px; background: var(--coal-3); box-shadow: inset 0 1px 3px rgb(0 0 0 / 0.6); overflow: hidden; }
html[data-kit] .nr-progress > i {
  position: absolute; left: 0; top: 0; bottom: 0; width: var(--v, 0%); border-radius: inherit;
  background: linear-gradient(90deg, var(--amber-lo), var(--amber) 70%, var(--amber-hi));
  box-shadow: 0 0 14px rgb(var(--amber-glow) / 0.7); transition: width 900ms var(--ease-out);
}
html[data-kit] .nr-progress > i::after { content: ""; position: absolute; right: 0; top: -4px; bottom: -4px; width: 14px; background: radial-gradient(closest-side, #fff8e6, transparent); }

/* Chuỗi ngày học: hàng cột đèn bật lần lượt (Brilliant streak, đổi thành cột đèn) */
html[data-kit] .nr-streak { display: flex; gap: 10px; }
html[data-kit] .nr-streak-day { display: grid; justify-items: center; gap: 6px; font-size: 0.75rem; color: var(--smoke); }
html[data-kit] .nr-streak-lamp { width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--coal-2); box-shadow: inset 0 0 0 1px var(--coal-3); color: #4a4944; }
html[data-kit] .nr-streak-lamp svg { width: 18px; height: 18px; }
html[data-kit] .nr-streak-day.is-on .nr-streak-lamp { background: radial-gradient(circle at 50% 40%, var(--amber-hi), var(--amber) 60%, var(--amber-lo)); color: var(--amber-ink); box-shadow: 0 0 20px -2px rgb(var(--amber-glow) / 0.8); }
html[data-kit] .nr-streak-day.is-on { color: var(--ivory); }
html[data-kit] .nr-streak-day.is-today .nr-streak-lamp { box-shadow: inset 0 0 0 2px var(--amber), 0 0 0 4px rgb(var(--amber-glow) / 0.15); color: var(--amber); }

/* Vòng tiến độ */
html[data-kit] .nr-ring { --v: 0; width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--amber) calc(var(--v) * 1%), var(--coal-3) 0); position: relative; }
html[data-kit] .nr-ring::before { content: ""; position: absolute; inset: 6px; border-radius: 50%; background: var(--coal); }
html[data-kit] .nr-ring > span { position: relative; font: 600 0.875rem/1 var(--f-mono); }

/* -------------------------------------------------------------------------- */
/* Toast, thanh phản hồi, modal, tooltip                                        */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-toasts { position: fixed; z-index: 9000; right: 16px; bottom: 16px; display: grid; gap: 10px; width: min(380px, calc(100vw - 32px)); }
html[data-kit] .nr-toast {
  display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; padding: 14px 14px 14px 16px;
  background: rgb(27 27 33 / 0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-radius: var(--r-2); box-shadow: inset 0 0 0 1px var(--coal-3), 0 20px 40px -12px #000;
  animation: nr-toast-in var(--d-slow) var(--ease-spring) both; overflow: hidden; position: relative;
}
html[data-kit] .nr-toast::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%; background: var(--amber); transform-origin: left; animation: nr-toast-timer var(--life, 4s) linear forwards; }
html[data-kit] .nr-toast.is-leaving { animation: nr-toast-out var(--d-mid) var(--ease-film) forwards; }
html[data-kit] .nr-toast svg { width: 22px; height: 22px; }
@keyframes nr-toast-in { from { opacity: 0; transform: translateY(16px) scale(0.96); } }
@keyframes nr-toast-out { to { opacity: 0; transform: translateX(30px); } }
@keyframes nr-toast-timer { to { transform: scaleX(0); } }

/* Thanh phản hồi đáy (Brilliant "Correct" → "Vụ án khép lại") */
html[data-kit] .nr-verdict {
  position: fixed; z-index: 8000; left: 0; right: 0; bottom: 0; transform: translateY(calc(100% + 80px)); visibility: hidden;
  background: linear-gradient(180deg, #1c1912, #121110); box-shadow: 0 -1px 0 rgb(var(--amber-glow) / 0.35), 0 -30px 60px -20px rgb(var(--amber-glow) / 0.25);
  transition: transform var(--d-slow) var(--ease-out), visibility 0s linear var(--d-slow);
}
html[data-kit] .nr-verdict.is-open { transform: none; visibility: visible; transition: transform var(--d-slow) var(--ease-out), visibility 0s; }
html[data-kit] .nr-verdict--wrong { background: linear-gradient(180deg, #1f1214, #120d0e); box-shadow: 0 -1px 0 rgb(var(--neon-glow) / 0.4), 0 -30px 60px -20px rgb(var(--neon-glow) / 0.2); }
html[data-kit] .nr-verdict-in { display: flex; align-items: center; gap: 16px; padding: 18px 0 calc(18px + env(safe-area-inset-bottom)); }
html[data-kit] .nr-verdict noir-character { width: 72px; height: 72px; flex: none; }
html[data-kit] .nr-verdict-text { flex: 1; min-width: 0; }
html[data-kit] .nr-verdict-title { font-family: var(--f-display); font-weight: 800; font-size: 1.75rem; text-transform: uppercase; letter-spacing: 0.01em; color: var(--amber); margin: 0; line-height: 1.1; }
html[data-kit] .nr-verdict--wrong .nr-verdict-title { color: #ff8a93; }
html[data-kit] .nr-verdict-sub { margin: 2px 0 0; color: var(--ivory-dim); font-size: 0.9375rem; }
html[data-kit] .nr-stamp {
  font: 700 0.8125rem/1 var(--f-mono); letter-spacing: 0.08em; color: var(--amber); padding: 6px 10px;
  box-shadow: inset 0 0 0 2px var(--amber); border-radius: var(--r-1); transform: rotate(-8deg);
}
html[data-kit] .nr-verdict.is-open .nr-stamp { animation: nr-stamp 520ms var(--ease-spring) 180ms both; }
@keyframes nr-stamp { from { opacity: 0; transform: rotate(-8deg) scale(2.4); } 60% { opacity: 1; transform: rotate(-8deg) scale(0.92); } to { transform: rotate(-8deg) scale(1); } }

html[data-kit] .nr-modal { position: fixed; inset: 0; z-index: 8500; display: grid; place-items: center; padding: 16px; visibility: hidden; }
html[data-kit] .nr-modal.is-open { visibility: visible; }
html[data-kit] .nr-modal-scrim { position: absolute; inset: 0; background: rgb(4 4 6 / 0.72); backdrop-filter: blur(4px); opacity: 0; transition: opacity var(--d-mid); }
html[data-kit] .nr-modal.is-open .nr-modal-scrim { opacity: 1; }
html[data-kit] .nr-modal-card { position: relative; width: min(520px, 100%); padding: 28px; border-radius: var(--r-2); background: var(--coal); box-shadow: inset 0 0 0 1px var(--coal-3), 0 40px 80px -20px #000; opacity: 0; transform: translateY(20px) scale(0.97); transition: all var(--d-slow) var(--ease-out); }
html[data-kit] .nr-modal-card::before { content: ""; position: absolute; left: 10%; right: 10%; top: -1px; height: 1px; background: linear-gradient(90deg, transparent, var(--amber), transparent); }
html[data-kit] .nr-modal.is-open .nr-modal-card { opacity: 1; transform: none; }

html[data-kit] [data-tip] { position: relative; }
html[data-kit] [data-tip]::after {
  content: attr(data-tip); position: absolute; left: 50%; bottom: calc(100% + 10px); transform: translate(-50%, 4px);
  padding: 6px 10px; border-radius: var(--r-1); background: var(--ivory); color: var(--ink); font: 500 0.75rem/1.3 var(--f-body);
  white-space: nowrap; opacity: 0; pointer-events: none; transition: all var(--d-fast) var(--ease-out); z-index: 50;
}
html[data-kit] [data-tip]:hover::after, html[data-kit] [data-tip]:focus-visible::after { opacity: 1; transform: translate(-50%, 0); }

/* -------------------------------------------------------------------------- */
/* Bảng, thống kê, avatar, accordion                                            */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-stat { display: grid; gap: 4px; }
html[data-kit] .nr-stat-value { font: 800 2.75rem/0.9 var(--f-display); letter-spacing: 0; }
html[data-kit] .nr-stat-label { font-size: var(--t-sm); color: var(--smoke); }
html[data-kit] .nr-stat-delta { font: 600 0.75rem/1 var(--f-mono); color: var(--amber); }
html[data-kit] .nr-stat-delta.is-down { color: #ff8a93; }

html[data-kit] .nr-table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
html[data-kit] .nr-table th { text-align: left; font-weight: 600; font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--smoke); padding: 10px 14px; border-bottom: 1px solid var(--coal-3); }
html[data-kit] .nr-table td { padding: 14px; border-bottom: 1px solid rgb(38 38 46 / 0.6); }
html[data-kit] .nr-table tbody tr { transition: background var(--d-fast); }
html[data-kit] .nr-table tbody tr:hover { background: linear-gradient(90deg, rgb(var(--amber-glow) / 0.07), transparent 60%); }

html[data-kit] .nr-avatar { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; flex: none; font: 600 0.875rem/1 var(--f-body); background: var(--coal-2); color: var(--ivory); box-shadow: 0 0 0 2px var(--ink-2), 0 0 0 3px var(--coal-3); filter: grayscale(1) contrast(1.2); }
html[data-kit] .nr-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; }
html[data-kit] .nr-avatars { display: flex; }
html[data-kit] .nr-avatars .nr-avatar + .nr-avatar { margin-left: -10px; }

html[data-kit] .nr-acc { border-bottom: 1px solid var(--coal-3); }
html[data-kit] .nr-acc summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 0; font-weight: 600; font-size: 1.0625rem; }
html[data-kit] .nr-acc summary::-webkit-details-marker { display: none; }
html[data-kit] .nr-acc summary::after { content: ""; width: 12px; height: 12px; flex: none; border-right: 2px solid var(--amber); border-bottom: 2px solid var(--amber); transform: rotate(45deg) translateY(-4px); transition: transform var(--d-mid) var(--ease-out); }
html[data-kit] .nr-acc[open] summary::after { transform: rotate(225deg) translateY(-2px); }
html[data-kit] .nr-acc[open] summary { color: var(--amber); }
html[data-kit] .nr-acc-body { padding: 0 0 20px; color: var(--ivory-dim); max-width: 66ch; animation: nr-acc 400ms var(--ease-out); }
@keyframes nr-acc { from { opacity: 0; transform: translateY(-6px); } }

/* -------------------------------------------------------------------------- */
/* Khung cảnh: đèn, hẻm đêm, mưa, vũng nước                                     */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-scene { position: relative; overflow: hidden; isolation: isolate; background: radial-gradient(120% 90% at 50% -10%, #1a1712 0%, var(--ink) 55%); }
html[data-kit] .nr-scene-blinds, html[data-kit] .nr-backdrop { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
html[data-kit] .nr-backdrop > canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
/* sương trôi: hai dải mờ lệch nhịp, rất chậm */
html[data-kit] .nr-fog {
  position: absolute; left: -30%; right: -30%; bottom: 6%; height: 46%;
  background: radial-gradient(40% 50% at 30% 60%, rgb(150 140 130 / 0.10), transparent 70%),
              radial-gradient(35% 45% at 75% 55%, rgb(150 140 130 / 0.08), transparent 70%);
  filter: blur(18px); animation: nr-fog 46s linear infinite alternate;
}
html[data-kit] .nr-fog--2 { bottom: 0; height: 30%; opacity: 0.8; animation-duration: 63s; animation-direction: alternate-reverse; }
@keyframes nr-fog { from { transform: translateX(-8%); } to { transform: translateX(8%); } }
html[data-kit] .nr-rain { position: absolute; inset: 0; z-index: 1; pointer-events: none; width: 100%; height: 100%; }
html[data-kit] .nr-flashlight {
  --fx: 50%; --fy: 40%;
  position: absolute; inset: 0; z-index: 3; pointer-events: none;
  background: radial-gradient(340px circle at var(--fx) var(--fy), transparent 0, rgb(4 4 6 / 0.32) 70%, rgb(4 4 6 / 0.58) 100%);
  transition: background 60ms linear;
}
html[data-kit] .nr-puddle { position: absolute; left: 50%; bottom: 0; width: 70%; height: 14%; transform: translateX(-50%); background: radial-gradient(50% 50% at 50% 50%, rgb(var(--amber-glow) / 0.14), transparent 70%); }

/* Lộ diện khi cuộn: "đèn bật" — chỉ dùng cho một nhóm nội dung mỗi trang */
html[data-kit] .nr-lampon { opacity: 0; filter: brightness(0.2); transform: translateY(10px); transition: opacity 700ms var(--ease-film), filter 900ms var(--ease-film), transform 700ms var(--ease-out); }
html[data-kit] .nr-lampon.is-lit { opacity: 1; filter: none; transform: none; }

/* Chuyển trang: đèn tắt, quầng sáng thu về chỗ vừa bấm */
@property --wr { syntax: "<length>"; inherits: false; initial-value: 150vmax; }
html[data-kit] .nr-wipe {
  position: fixed; inset: 0; z-index: 9500; pointer-events: none; visibility: hidden;
  background: radial-gradient(circle at var(--wx, 50%) var(--wy, 50%), transparent calc(var(--wr) * 0.6), rgb(var(--amber-glow) / 0.16) calc(var(--wr) * 0.8), var(--ink) var(--wr));
}
html[data-kit] .nr-wipe.is-run { visibility: visible; animation: nr-wipe 640ms var(--ease-film) both; }
@keyframes nr-wipe { 0% { --wr: 150vmax; } 100% { --wr: 0px; } }

/* Thanh điều hướng */
html[data-kit] .nr-nav { position: sticky; top: 0; z-index: 500; background: rgb(8 8 10 / 0.72); backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); box-shadow: 0 1px 0 rgb(237 230 214 / 0.06); }
html[data-kit] .nr-nav-in { display: flex; align-items: center; gap: 24px; height: 68px; }
html[data-kit] .nr-logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 800 1.375rem/1 var(--f-display); text-transform: uppercase; letter-spacing: 0.04em; }
html[data-kit] .nr-logo-mark { width: 30px; height: 30px; }
html[data-kit] .nr-nav-links { display: flex; gap: 4px; margin-left: auto; }
html[data-kit] .nr-nav-link { position: relative; padding: 8px 12px; border-radius: var(--r-1); text-decoration: none; font-size: 0.9375rem; color: var(--ivory-dim); transition: color var(--d-fast); }
html[data-kit] .nr-nav-link:hover, html[data-kit] .nr-nav-link[aria-current="page"] { color: var(--ivory); }
html[data-kit] .nr-nav-link[aria-current="page"]::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px; background: var(--amber); box-shadow: 0 0 10px var(--amber); }

/* -------------------------------------------------------------------------- */
/* Giảm chuyển động                                                             */
/* -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html[data-kit] *, html[data-kit] *::before, html[data-kit] *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
  html[data-kit] body.nr-grain::after { animation: none; }
  html[data-kit] .nr-lampon { opacity: 1; filter: none; transform: none; }
  html[data-kit] .nr-boil { filter: none; }
  html[data-kit] .nr-redact::after { transform: scaleX(0); }
}

/* Toast: nội dung và tông */
html[data-kit] .nr-toast strong { display: block; font-weight: 700; font-size: 0.9375rem; }
html[data-kit] .nr-toast div > span { display: block; color: var(--ivory-dim); font-size: 0.875rem; line-height: 1.45; }
html[data-kit] .nr-toast noir-icon { color: var(--amber); }
html[data-kit] .nr-toast--warn::after, html[data-kit] .nr-toast--neon::after { background: var(--neon); }
html[data-kit] .nr-toast--warn noir-icon, html[data-kit] .nr-toast--neon noir-icon { color: var(--neon); }
html[data-kit] .nr-toast--info::after { background: var(--ivory); }

/* Điều hướng trên điện thoại: một hàng cuộn ngang, chữ không xuống dòng */
html[data-kit] .nr-nav-link { white-space: nowrap; }
@media (max-width: 720px) {
  html[data-kit] .nr-nav-in { gap: 12px; }
  html[data-kit] .nr-logo { flex-shrink: 0; white-space: nowrap; font-size: 0.9375rem; }
  html[data-kit] .nr-nav-links { min-width: 0; overflow-x: auto; scrollbar-width: none; -webkit-mask-image: linear-gradient(90deg, #000 85%, transparent); mask-image: linear-gradient(90deg, #000 85%, transparent); }
  html[data-kit] .nr-nav-links::-webkit-scrollbar { display: none; }
  html[data-kit] .nr-nav-link { padding: 8px 10px; font-size: 0.875rem; }
}

/* Thuộc tính hidden luôn thắng display của class */
html[data-kit] [hidden] { display: none !important; }

/* -------------------------------------------------------------------------- */
/* Nút chuyển phong cách (dùng chung cho mọi phong cách)                            */
/* -------------------------------------------------------------------------- */
html[data-kit] .nr-stylepick {
  position: fixed; z-index: 9100; right: 16px; top: 80px;
  display: inline-flex; gap: 4px; padding: 4px; border-radius: 10px;
  background: rgb(14 12 10 / 0.9); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: inset 0 0 0 1px rgb(237 230 214 / 0.18), 0 12px 30px -10px #000;
  font: 600 0.8125rem/1 "Be Vietnam Pro", system-ui, sans-serif;
}
html[data-kit] .nr-stylepick button {
  min-height: 36px; padding: 0 12px; border: 0; border-radius: 7px; cursor: pointer;
  background: none; color: #b9b2a3; font: inherit; white-space: nowrap;
}
html[data-kit] .nr-stylepick button:hover { color: #ede6d6; }
html[data-kit] .nr-stylepick button[aria-pressed="true"] { background: #ede6d6; color: #16110b; }
html[data-kit] .nr-stylepick button:focus-visible { outline: 2px solid #f2a93b; outline-offset: 2px; }
/* Màn hẹp: dời xuống dưới để khỏi đè tiêu đề; chừa chỗ cho thanh nút đáy của bài học */
@media (max-width: 720px) {
  html[data-kit] .nr-stylepick { top: auto; right: 12px; bottom: calc(96px + env(safe-area-inset-bottom)); font-size: 0.75rem; }
  html[data-kit] .nr-stylepick button { min-height: 32px; padding: 0 10px; }
}
/* Bản nằm trong thanh điều hướng: theo dòng chảy trang, đứng sau các liên kết */
html[data-kit] .nr-stylepick--nav { position: static; flex: none; margin-left: 4px; }
html[data-kit] .nr-stylepick select { display: none; }
/* Gọn thành ô chọn khi màn hẹp hoặc nav không đủ chỗ cho dãy nút (noir-style.js đặt .is-compact) */
html[data-kit] .nr-stylepick--nav.is-compact { margin-left: auto; padding: 0; background: none; box-shadow: none; backdrop-filter: none; -webkit-backdrop-filter: none; }
html[data-kit] .nr-stylepick--nav.is-compact button { display: none; }
html[data-kit] .nr-stylepick--nav.is-compact select {
  display: block; max-width: 7.5rem; min-height: 36px; padding: 0 26px 0 10px; border: 0; border-radius: 8px; cursor: pointer;
  appearance: none; -webkit-appearance: none; font: 600 0.75rem/1 "Be Vietnam Pro", system-ui, sans-serif; color: #ede6d6;
  background: rgb(14 12 10 / 0.9) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23ede6d6' stroke-width='1.6'/%3E%3C/svg%3E") no-repeat right 9px center;
  box-shadow: inset 0 0 0 1px rgb(237 230 214 / 0.18); text-overflow: ellipsis;
}
html[data-kit] .nr-stylepick--nav.is-compact select:focus-visible { outline: 2px solid #f2a93b; outline-offset: 2px; }