/* ==========================================================================
   XQChess · Hướng dẫn (guide) — lacquer parchment editorial
   Complements xq-app.css tokens. Scoped under .xq-guide.
   ========================================================================== */

.xq-guide {
  --g-cinnabar: #c23a22;
  --g-cinnabar-deep: #8a2414;
  --g-lacquer: #2a1810;
  --g-ink: #1a120c;
  --g-gold: #f0c56a;
  --g-gold-soft: rgba(240, 197, 106, 0.22);
  --g-paper: #f3e2b8;
  --g-paper-dim: rgba(243, 226, 184, 0.08);
  --g-river: #3d6b5c;
  --g-ease: cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  margin: 0 auto 2.5rem;
  max-width: 920px;
  animation: xq-guide-enter 0.7s var(--g-ease) both;
}

@keyframes xq-guide-enter {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---- Hero --------------------------------------------------------------- */

.xq-guide-hero {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid var(--xq-border);
  background:
    radial-gradient(ellipse 80% 70% at 88% 0%, rgba(240, 197, 106, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 50% at 0% 100%, rgba(194, 58, 34, 0.16), transparent 50%),
    linear-gradient(165deg, rgba(48, 34, 22, 0.96), rgba(22, 16, 12, 0.98));
  box-shadow: var(--xq-shadow);
  padding: 1.35rem 1.35rem 1.5rem;
  margin-bottom: 1.25rem;
}

.xq-guide-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.xq-guide-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1.1rem;
  align-items: center;
}

@media (min-width: 768px) {
  .xq-guide-hero {
    padding: 1.75rem 1.85rem 1.9rem;
  }

  .xq-guide-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 1.5rem;
  }
}

.xq-guide-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  align-items: center;
  font-size: 0.82rem;
  color: var(--xq-muted);
  margin-bottom: 0.65rem;
}

.xq-guide-breadcrumb a {
  color: var(--g-gold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.xq-guide-breadcrumb a:hover,
.xq-guide-breadcrumb a:focus-visible {
  color: var(--xq-paper-strong);
  border-bottom-color: rgba(240, 197, 106, 0.55);
}

.xq-guide-breadcrumb__sep {
  opacity: 0.45;
  user-select: none;
}

.xq-guide-seal {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.22rem 0.65rem 0.22rem 0.35rem;
  border-radius: 999px;
  border: 1px solid rgba(240, 197, 106, 0.35);
  background: rgba(0, 0, 0, 0.28);
  color: var(--g-gold);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.55rem;
}

.xq-guide-seal__dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #ff8a6a, var(--g-cinnabar));
  box-shadow: 0 0 0 2px rgba(194, 58, 34, 0.25);
}

.xq-guide-hero h1 {
  font-family: XQDisplay, Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 3.6vw, 2.35rem);
  line-height: 1.15;
  color: var(--xq-paper-strong);
  margin: 0 0 0.65rem;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.35);
  letter-spacing: 0.01em;
}

.xq-guide-hero__lead {
  color: rgba(246, 234, 212, 0.9);
  font-size: 1.02rem;
  line-height: 1.55;
  margin: 0 0 1rem;
  max-width: 38rem;
}

.xq-guide-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.xq-guide-hero__art {
  position: relative;
  min-height: 168px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.xq-guide-hero__art svg {
  width: min(100%, 320px);
  height: auto;
  filter: drop-shadow(0 12px 28px rgba(0, 0, 0, 0.4));
  animation: xq-guide-float 5.5s ease-in-out infinite;
}

@keyframes xq-guide-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

/* ---- TOC chips ---------------------------------------------------------- */

.xq-guide-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 1.25rem;
  padding: 0.55rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 218, 141, 0.16);
  background: rgba(20, 14, 10, 0.45);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 72px;
  z-index: 5;
}

.xq-guide-toc a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--xq-muted);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s var(--g-ease);
}

.xq-guide-toc a:hover,
.xq-guide-toc a:focus-visible {
  color: var(--xq-paper);
  background: var(--g-gold-soft);
  border-color: rgba(240, 197, 106, 0.35);
  transform: translateY(-1px);
}

.xq-guide-toc a span {
  display: inline-grid;
  place-items: center;
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  font-size: 0.68rem;
  font-weight: 800;
  background: rgba(194, 58, 34, 0.85);
  color: #fff8e8;
}

/* ---- Sections ----------------------------------------------------------- */

.xq-guide-section {
  position: relative;
  margin-bottom: 1rem;
  padding: 1.15rem 1.2rem 1.25rem;
  border-radius: 18px;
  border: 1px solid rgba(255, 218, 141, 0.18);
  background:
    linear-gradient(180deg, rgba(55, 40, 26, 0.72), rgba(28, 20, 14, 0.88)),
    var(--g-paper-dim);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
  overflow: hidden;
}

.xq-guide-section::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12%;
  bottom: 12%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--g-gold), var(--g-cinnabar));
  opacity: 0.85;
}

.xq-guide-section h2 {
  font-family: XQDisplay, Georgia, serif;
  font-size: 1.28rem;
  color: var(--xq-paper-strong);
  margin: 0 0 0.65rem;
  padding-left: 0.35rem;
}

.xq-guide-section h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--g-gold);
  margin: 1rem 0 0.4rem;
}

.xq-guide-section p,
.xq-guide-section li {
  color: rgba(246, 234, 212, 0.92);
  line-height: 1.62;
}

.xq-guide-section p {
  margin: 0 0 0.75rem;
}

.xq-guide-section p:last-child {
  margin-bottom: 0;
}

.xq-guide-section ol,
.xq-guide-section ul {
  margin: 0 0 0.75rem;
  padding-left: 1.2rem;
}

.xq-guide-section a {
  color: var(--g-gold);
  text-underline-offset: 0.15em;
}

.xq-guide-section a:hover {
  color: var(--xq-paper-strong);
}

/* ---- Step path ---------------------------------------------------------- */

.xq-guide-steps {
  display: grid;
  gap: 0.75rem;
  margin: 0.25rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: gstep;
}

.xq-guide-steps li {
  counter-increment: gstep;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
  padding: 0.85rem 0.95rem;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 218, 141, 0.12);
  transition: border-color 0.2s ease, transform 0.25s var(--g-ease), background 0.2s ease;
}

.xq-guide-steps li:hover {
  border-color: rgba(240, 197, 106, 0.4);
  transform: translateX(3px);
  background: rgba(0, 0, 0, 0.32);
}

.xq-guide-steps li::before {
  content: counter(gstep);
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  font-family: XQDisplay, Georgia, serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--g-ink);
  background: linear-gradient(145deg, var(--g-gold), #c99a3a);
  box-shadow: 0 4px 12px rgba(240, 197, 106, 0.28);
  flex-shrink: 0;
}

.xq-guide-steps strong {
  display: block;
  color: var(--xq-paper-strong);
  margin-bottom: 0.15rem;
}

/* ---- Hub cards ---------------------------------------------------------- */

.xq-guide-hub {
  display: grid;
  gap: 0.9rem;
  margin: 0 0 1.25rem;
}

@media (min-width: 768px) {
  .xq-guide-hub {
    grid-template-columns: repeat(3, 1fr);
  }
}

.xq-guide-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  border-radius: 18px;
  border: 1px solid rgba(255, 218, 141, 0.2);
  background: linear-gradient(165deg, rgba(52, 38, 24, 0.92), rgba(22, 16, 12, 0.95));
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  transition: transform 0.28s var(--g-ease), border-color 0.2s ease, box-shadow 0.28s ease;
}

.xq-guide-card:hover,
.xq-guide-card:focus-visible {
  transform: translateY(-5px);
  border-color: rgba(240, 197, 106, 0.5);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
  color: inherit;
  outline: none;
}

.xq-guide-card__art {
  position: relative;
  height: 118px;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 70% 30%, rgba(240, 197, 106, 0.2), transparent 55%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.45));
  border-bottom: 1px solid rgba(255, 218, 141, 0.12);
}

.xq-guide-card__art svg {
  width: 92px;
  height: 92px;
}

.xq-guide-card__body {
  padding: 1rem 1.05rem 1.15rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.45rem;
}

.xq-guide-card__body h2 {
  font-family: XQDisplay, Georgia, serif;
  font-size: 1.15rem;
  color: var(--xq-paper-strong);
  margin: 0;
  line-height: 1.25;
}

.xq-guide-card__body p {
  margin: 0;
  flex: 1;
  font-size: 0.92rem;
  color: var(--xq-muted);
  line-height: 1.5;
}

.xq-guide-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.35rem;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--g-gold);
}

.xq-guide-card__cta::after {
  content: "→";
  transition: transform 0.2s var(--g-ease);
}

.xq-guide-card:hover .xq-guide-card__cta::after {
  transform: translateX(4px);
}

.xq-guide-card--play .xq-guide-card__art {
  background:
    radial-gradient(circle at 30% 40%, rgba(119, 179, 0, 0.22), transparent 50%),
    linear-gradient(180deg, rgba(30, 40, 18, 0.5), rgba(0, 0, 0, 0.45));
}

.xq-guide-card--rules .xq-guide-card__art {
  background:
    radial-gradient(circle at 60% 50%, rgba(240, 197, 106, 0.25), transparent 50%),
    linear-gradient(180deg, rgba(40, 28, 16, 0.5), rgba(0, 0, 0, 0.45));
}

.xq-guide-card--blind .xq-guide-card__art {
  background:
    radial-gradient(circle at 50% 40%, rgba(194, 58, 34, 0.28), transparent 52%),
    linear-gradient(180deg, rgba(40, 18, 16, 0.55), rgba(0, 0, 0, 0.45));
}

/* ---- Piece strip (rules) ------------------------------------------------ */

.xq-guide-pieces {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 0.65rem;
  margin: 0.75rem 0 0;
}

.xq-guide-piece {
  text-align: center;
  padding: 0.75rem 0.5rem 0.7rem;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 218, 141, 0.14);
  transition: transform 0.2s var(--g-ease), border-color 0.2s ease;
}

.xq-guide-piece:hover {
  transform: translateY(-3px);
  border-color: rgba(240, 197, 106, 0.4);
}

.xq-guide-piece__glyph {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  margin: 0 auto 0.45rem;
  border-radius: 50%;
  font-family: XQDisplay, "Noto Sans SC", "Songti SC", serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #3a120c;
  background:
    radial-gradient(circle at 32% 28%, #fff0c8, #e8b84a 55%, #b8842a);
  border: 2px solid rgba(90, 40, 12, 0.45);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.45),
    0 6px 14px rgba(0, 0, 0, 0.35);
}

.xq-guide-piece__glyph--black {
  color: #f5e6c8;
  background:
    radial-gradient(circle at 32% 28%, #4a4038, #1e1814 60%, #0c0a08);
  border-color: rgba(240, 197, 106, 0.35);
}

.xq-guide-piece strong {
  display: block;
  font-size: 0.88rem;
  color: var(--xq-paper-strong);
  margin-bottom: 0.2rem;
}

.xq-guide-piece span {
  display: block;
  font-size: 0.75rem;
  line-height: 1.35;
  color: var(--xq-muted);
}

/* ---- Flip duo (cờ úp) --------------------------------------------------- */

.xq-guide-flip {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

@media (min-width: 576px) {
  .xq-guide-flip {
    grid-template-columns: 1fr 1fr;
  }
}

.xq-guide-flip__cell {
  position: relative;
  padding: 1rem;
  border-radius: 16px;
  text-align: center;
  border: 1px solid rgba(255, 218, 141, 0.16);
  background: rgba(0, 0, 0, 0.25);
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.xq-guide-flip__cell h3 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--g-gold);
}

.xq-guide-flip__cell p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--xq-muted);
}

.xq-guide-coin {
  width: 4.25rem;
  height: 4.25rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: XQDisplay, serif;
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.xq-guide-coin--down {
  color: transparent;
  background:
    radial-gradient(circle at 30% 25%, #5a4630, #2a1c12 55%, #120c08);
  border: 3px solid rgba(240, 197, 106, 0.45);
  position: relative;
}

.xq-guide-coin--down::after {
  content: "？";
  color: rgba(240, 197, 106, 0.55);
  font-size: 1.6rem;
}

.xq-guide-coin--up {
  color: #3a120c;
  background: radial-gradient(circle at 32% 28%, #fff0c8, #e8b84a 55%, #b8842a);
  border: 3px solid rgba(90, 40, 12, 0.4);
}

/* ---- Compare table ------------------------------------------------------ */

.xq-guide-compare {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  overflow: hidden;
  border-radius: 12px;
}

.xq-guide-compare th,
.xq-guide-compare td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid rgba(255, 218, 141, 0.12);
  text-align: left;
  vertical-align: top;
}

.xq-guide-compare th {
  background: rgba(0, 0, 0, 0.35);
  color: var(--g-gold);
  font-weight: 700;
  width: 32%;
}

.xq-guide-compare td {
  background: rgba(0, 0, 0, 0.18);
  color: rgba(246, 234, 212, 0.9);
}

.xq-guide-compare tr:last-child th,
.xq-guide-compare tr:last-child td {
  border-bottom: 0;
}

/* ---- FAQ accordion-ish -------------------------------------------------- */

.xq-guide-faq details {
  border-radius: 12px;
  border: 1px solid rgba(255, 218, 141, 0.14);
  background: rgba(0, 0, 0, 0.22);
  margin-bottom: 0.5rem;
  padding: 0.15rem 0.85rem;
  transition: border-color 0.2s ease;
}

.xq-guide-faq details[open] {
  border-color: rgba(240, 197, 106, 0.35);
}

.xq-guide-faq summary {
  cursor: pointer;
  list-style: none;
  padding: 0.7rem 0;
  font-weight: 700;
  color: var(--xq-paper-strong);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.xq-guide-faq summary::-webkit-details-marker {
  display: none;
}

.xq-guide-faq summary::after {
  content: "+";
  font-family: XQDisplay, serif;
  font-size: 1.25rem;
  color: var(--g-gold);
  transition: transform 0.2s ease;
}

.xq-guide-faq details[open] summary::after {
  content: "−";
}

.xq-guide-faq details p {
  margin: 0 0 0.85rem;
  color: var(--xq-muted);
  line-height: 1.55;
}

/* ---- Bottom CTA ribbon -------------------------------------------------- */

.xq-guide-ribbon {
  position: relative;
  margin-top: 1.25rem;
  padding: 1.25rem 1.35rem;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(240, 197, 106, 0.35);
  background:
    radial-gradient(ellipse 70% 100% at 100% 50%, rgba(194, 58, 34, 0.28), transparent 55%),
    linear-gradient(110deg, rgba(48, 32, 18, 0.95), rgba(28, 18, 12, 0.98));
  box-shadow: var(--xq-shadow);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.xq-guide-ribbon h2 {
  font-family: XQDisplay, Georgia, serif;
  font-size: 1.25rem;
  color: var(--xq-paper-strong);
  margin: 0 0 0.25rem;
}

.xq-guide-ribbon p {
  margin: 0;
  color: var(--xq-muted);
  font-size: 0.92rem;
}

.xq-guide-ribbon__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ---- Answer callout ----------------------------------------------------- */

.xq-guide-callout {
  position: relative;
  margin: 0 0 1rem;
  padding: 1.1rem 1.2rem 1.15rem 1.35rem;
  border-radius: 16px;
  border: 1px solid rgba(240, 197, 106, 0.28);
  background:
    linear-gradient(135deg, rgba(240, 197, 106, 0.1), transparent 40%),
    rgba(30, 22, 14, 0.88);
}

.xq-guide-callout::before {
  content: "Tóm tắt";
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--g-ink);
  background: linear-gradient(90deg, var(--g-gold), #d4a84a);
  padding: 0.18rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.55rem;
}

.xq-guide-callout p {
  margin: 0;
  color: rgba(246, 234, 212, 0.95);
  line-height: 1.6;
  font-size: 1.02rem;
}

/* ---- Related links row -------------------------------------------------- */

.xq-guide-related {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.35rem;
}

.xq-guide-related a {
  display: inline-flex;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--xq-paper);
  border: 1px solid rgba(255, 218, 141, 0.22);
  background: rgba(0, 0, 0, 0.25);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.xq-guide-related a:hover {
  background: var(--g-gold-soft);
  border-color: rgba(240, 197, 106, 0.45);
  color: var(--xq-paper-strong);
}

/* ---- Reduced motion ----------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .xq-guide,
  .xq-guide-hero__art svg,
  .xq-guide-card,
  .xq-guide-steps li {
    animation: none !important;
    transition: none !important;
  }
}