/* Acertijo del Día — guia.css */
:root {
  --bg: hsl(220 20% 98.5%);
  --fg: hsl(240 10% 12%);
  --card-bg: #fff;
  --border: hsl(240 6% 88%);
  --muted: hsl(240 4% 46%);
  --primary: hsl(250 85% 60%);
  --secondary: hsl(220 18% 95.8%);
  --shell-bg: hsla(243, 26%, 87%, 0.96);
  --shell-border: hsl(250 18% 78% / 0.95);
  --trail-parity: hsl(280 70% 58%);
  --trail-probability: hsl(200 80% 50%);
  --trail-masters: hsl(340 70% 55%);
  --trail-lateral: hsl(35 85% 52%);
}

[data-theme="dark"] {
  --bg: hsl(242 12% 7%);
  --fg: hsl(240 5% 96%);
  --card-bg: hsl(242 10% 11%);
  --border: hsl(242 6% 18%);
  --muted: hsl(240 5% 64%);
  --primary: hsl(252 80% 68%);
  --secondary: hsl(242 10% 16%);
  --shell-bg: hsla(243, 12%, 10%, 0.96);
  --shell-border: hsl(242 8% 20% / 0.95);
  --trail-parity: hsl(280 65% 68%);
  --trail-probability: hsl(200 70% 62%);
  --trail-masters: hsl(340 60% 65%);
  --trail-lateral: hsl(35 75% 62%);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { min-height: 100%; background: var(--bg); color: var(--fg); }
body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
  padding-bottom: 3rem;
}
button { cursor: pointer; font: inherit; border: 0; background: transparent; color: inherit; -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }

/* ═══════════════════════════════════════════
   PAGE LAYOUT
   ═══════════════════════════════════════════ */
.page-main {
  width: min(42rem, calc(100% - 2rem));
  margin-inline: auto;
  padding-top: 5.78rem;
  padding-bottom: 3rem;
}

/* ═══════════════════════════════════════════
   PAGE HEADER
   ═══════════════════════════════════════════ */
.page-title {
  font-family: "Crimson Pro", Georgia, serif;
  font-size: 2.4rem; font-weight: 600; letter-spacing: -0.02em;
  color: var(--fg); margin: 0 0 0.3rem;
  animation: pageIn 0.38s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.page-subtitle {
  font-family: "Crimson Pro", Georgia, serif;
  font-size: 1.05rem; font-style: italic; font-weight: 400;
  color: var(--muted); margin: 0 0 1.8rem; line-height: 1.6;
  animation: pageIn 0.38s 0.07s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ═══════════════════════════════════════════
   SECTION HEADERS (shared)
   ═══════════════════════════════════════════ */
.section-hd {
  margin-bottom: 1rem;
}
.section-hd h2 {
  font-family: "Crimson Pro", Georgia, serif;
  font-size: 1.5rem; font-weight: 600; letter-spacing: -0.015em;
  color: var(--fg); margin: 0 0 0.2rem;
}
.section-hd p {
  font-size: 0.84rem; color: var(--muted); font-weight: 450;
  margin: 0;
}

/* ═══════════════════════════════════════════
   GUIDED PUZZLE (HERO)
   ═══════════════════════════════════════════ */
.guided-section {
  margin-bottom: 3rem;
  animation: pageIn 0.38s 0.12s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.guided-card {
  border: 1px solid rgba(113, 84, 232, 0.2);
  border: 1px solid hsl(from var(--primary) h s l / 0.2);
  border-top: 3px solid var(--primary);
  border-radius: 20px;
  background: var(--card-bg);
  padding: 1.5rem;
  box-shadow: 0 4px 16px rgba(113, 84, 232, 0.05);
  transition: box-shadow 0.2s ease;
}
[data-theme="dark"] .guided-card {
  background: linear-gradient(180deg, hsl(242 12% 14%) 0%, hsl(242 12% 10%) 100%);
  border-color: hsl(252 60% 50% / 0.25);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 1px 0 rgba(255,255,255,0.06) inset,
    0 8px 28px hsl(242 44% 3% / 0.4);
}

.guided-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 0.8rem;
}
.guided-badge {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.68rem; font-weight: 780; letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(113, 84, 232, 0.08);
  background: hsl(from var(--primary) h s l / 0.08);
  padding: 0.28rem 0.7rem; border-radius: 999px;
}
.guided-badge::before {
  content: '';
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.7;
}
[data-theme="dark"] .guided-badge {
  background: hsl(252 50% 50% / 0.15);
}
.guided-step-count {
  font-size: 0.72rem; font-weight: 600; color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.guided-progress {
  display: flex; gap: 0.35rem; margin-bottom: 1.2rem;
}
.guided-dot {
  width: 100%; height: 4px; border-radius: 3px;
  background: var(--border);
  transition: background 0.28s ease, box-shadow 0.28s ease;
}
.guided-dot.done { background: rgba(113, 84, 232, 0.38); background: hsl(from var(--primary) h s l / 0.38); }
.guided-dot.active {
  background: var(--primary);
  box-shadow: 0 0 6px rgba(113, 84, 232, 0.3);
  box-shadow: 0 0 6px hsl(from var(--primary) h s l / 0.3);
}

.guided-step-content {
  min-height: 10rem;
  animation: guidedFade 0.28s ease both;
}
@keyframes guidedFade { from { opacity: 0; transform: translateX(8px); } to { opacity: 1; transform: none; } }

.guided-step-heading {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.guided-step-icon {
  width: 2.2rem; height: 2.2rem; border-radius: 10px;
  background: rgba(113, 84, 232, 0.08);
  background: hsl(from var(--primary) h s l / 0.08);
  display: grid; place-items: center; flex-shrink: 0;
  color: var(--primary);
}
[data-theme="dark"] .guided-step-icon {
  background: hsl(252 40% 20% / 0.5);
}

.guided-step-label {
  font-size: 1.05rem; font-weight: 720; letter-spacing: -0.015em;
  color: var(--fg); margin: 0; line-height: 1.2;
}
.guided-step-body p {
  font-size: 0.88rem; line-height: 1.65; color: var(--muted);
  margin: 0 0 0.55rem;
}
.guided-step-body p.p-lead {
  margin-top: 0.3rem;
}
.guided-step-body p:last-child { margin-bottom: 0; }
.guided-step-body strong { color: var(--fg); font-weight: 700; }
.guided-step-body .guide-list {
  margin: 0.3rem 0 0.55rem 0; padding-left: 1.3rem;
  display: flex; flex-direction: column; gap: 0.3rem;
}
.guided-step-body .guide-list li {
  font-size: 0.88rem; line-height: 1.62; color: var(--muted);
}
.guided-step-body ol.guide-list { list-style: decimal; }
.guided-step-body ol.guide-list li { padding-left: 0.15rem; }
.guided-step-body .guide-list:last-child { margin-bottom: 0; }

.guided-nav {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 1.4rem; padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.guided-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.82rem; font-weight: 660; padding: 0.55rem 1rem;
  border-radius: 10px; transition: all 0.16s cubic-bezier(0.22, 1, 0.36, 1);
  text-decoration: none;
}
.guided-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.guided-btn.hidden { visibility: hidden; pointer-events: none; }

.guided-btn-prev {
  color: var(--muted);
  background: var(--secondary);
}
.guided-btn-prev:hover { background: var(--border); color: var(--fg); transform: translateX(-2px); }

.guided-btn-next, .guided-btn-cta {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 2px 8px rgba(113, 84, 232, 0.25);
}
.guided-btn-next:hover, .guided-btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(113, 84, 232, 0.38);
}
.guided-btn-next:active, .guided-btn-cta:active {
  transform: translateY(0);
  transition-duration: 80ms;
}
.guided-btn-next svg, .guided-btn-cta svg { width: 14px; height: 14px; }

[data-theme="dark"] .guided-btn-prev { background: hsl(242 10% 16%); }
[data-theme="dark"] .guided-btn-prev:hover { background: hsl(242 10% 22%); color: var(--fg); }
[data-theme="dark"] .guided-btn-next,
[data-theme="dark"] .guided-btn-cta {
  background: var(--primary);
  box-shadow: 0 2px 12px rgba(113, 84, 232, 0.35);
}

/* ═══════════════════════════════════════════
   TRAILS
   ═══════════════════════════════════════════ */
.trails-section {
  margin-bottom: 3rem;
  animation: pageIn 0.38s 0.18s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.trails-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
}
@media (max-width: 640px) {
  .trails-grid { grid-template-columns: 1fr; }
}

.trail-card {
  border: 1px solid hsl(240 6% 88% / 0.7);
  border: 1px solid hsl(from var(--border) h s l / 0.7);
  border-left: 3px solid transparent;
  border-radius: 16px;
  background: var(--card-bg);
  padding: 1.1rem 1.1rem 1.1rem 0.95rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
  transition: border-color 0.2s ease, border-left-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}
.trail-card:hover {
  border-left-color: var(--primary);
  border-color: rgba(113, 84, 232, 0.22);
  border-color: hsl(from var(--primary) h s l / 0.22);
  box-shadow: 0 8px 24px rgba(113, 84, 232, 0.07);
  transform: translateY(-2px);
}
.trail-card:focus-within {
  border-left-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(113, 84, 232, 0.15);
  box-shadow: 0 0 0 2px hsl(from var(--primary) h s l / 0.15);
}
[data-theme="dark"] .trail-card {
  background: linear-gradient(180deg, hsl(242 10% 13%) 0%, hsl(242 10% 10%) 100%);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03) inset,
    0 1px 0 rgba(255,255,255,0.05) inset,
    0 4px 14px hsl(242 44% 3% / 0.35);
}
[data-theme="dark"] .trail-card:hover {
  border-left-color: var(--primary);
  border-color: hsl(252 60% 50% / 0.28);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 1px 0 rgba(255,255,255,0.06) inset,
    0 8px 24px rgba(113, 84, 232, 0.12);
}

.trail-card-header {
  display: flex; align-items: flex-start; gap: 0.7rem;
  margin-bottom: 0.9rem;
}
.trail-icon {
  width: 2.4rem; height: 2.4rem; border-radius: 10px;
  background: hsl(220 18% 95.8% / 0.8);
  background: hsl(from var(--secondary) h s l / 0.8);
  display: grid; place-items: center; flex-shrink: 0;
}
[data-theme="dark"] .trail-icon {
  background: hsl(242 10% 16%);
}
.trail-meta { flex: 1; min-width: 0; }
.trail-title {
  font-size: 0.92rem; font-weight: 740; letter-spacing: -0.012em;
  color: var(--fg); margin: 0 0 0.15rem;
  line-height: 1.2;
}
.trail-desc {
  font-size: 0.76rem; color: var(--muted); line-height: 1.4;
  margin: 0;
}

.trail-puzzles {
  display: flex; flex-direction: column; gap: 0;
}
.trail-puzzle-link {
  display: grid; grid-template-columns: 1.4rem 1fr auto;
  align-items: center; gap: 0.5rem;
  padding: 0.5rem 0.3rem;
  border-top: 1px solid hsl(240 6% 88% / 0.5);
  border-top: 1px solid hsl(from var(--border) h s l / 0.5);
  font-size: 0.78rem; color: var(--fg);
  transition: background 0.12s ease;
  text-decoration: none;
}
.trail-puzzle-link:first-child { border-top: none; }
.trail-puzzle-link:hover { background: hsl(220 18% 95.8% / 0.5); background: hsl(from var(--secondary) h s l / 0.5); border-radius: 6px; }
[data-theme="dark"] .trail-puzzle-link:hover { background: hsl(250 15% 15%); }

.trail-puzzle-num {
  width: 1.4rem; height: 1.4rem; border-radius: 999px;
  display: grid; place-items: center;
  background: hsl(220 18% 95.8% / 0.7);
  background: hsl(from var(--secondary) h s l / 0.7);
  font-size: 0.62rem; font-weight: 780; color: var(--muted);
}
[data-theme="dark"] .trail-puzzle-num { background: hsl(242 10% 16%); }

.trail-puzzle-title {
  font-weight: 530; line-height: 1.25;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.trail-puzzle-diff {
  font-size: 0.62rem; font-weight: 660; letter-spacing: 0.02em;
  color: var(--muted); white-space: nowrap;
  padding: 0.15rem 0.45rem; border-radius: 999px;
  background: var(--secondary);
}
[data-theme="dark"] .trail-puzzle-diff { background: hsl(242 10% 16%); }
.trail-puzzle-diff[data-diff="1"] { color: hsl(160 60% 42%); }
.trail-puzzle-diff[data-diff="2"] { color: hsl(200 60% 45%); }
.trail-puzzle-diff[data-diff="3"] { color: hsl(35 70% 48%); }
.trail-puzzle-diff[data-diff="4"] { color: hsl(350 60% 50%); }
.trail-puzzle-diff[data-diff="5"] { color: hsl(280 60% 50%); }
[data-theme="dark"] .trail-puzzle-diff[data-diff="1"] { color: hsl(160 55% 58%); }
[data-theme="dark"] .trail-puzzle-diff[data-diff="2"] { color: hsl(200 55% 62%); }
[data-theme="dark"] .trail-puzzle-diff[data-diff="3"] { color: hsl(35 65% 60%); }
[data-theme="dark"] .trail-puzzle-diff[data-diff="4"] { color: hsl(350 55% 62%); }
[data-theme="dark"] .trail-puzzle-diff[data-diff="5"] { color: hsl(280 55% 65%); }

/* ═══════════════════════════════════════════
   ACCORDION (Reference)
   ═══════════════════════════════════════════ */
.reference-section {
  margin-bottom: 0;
  animation: pageIn 0.38s 0.24s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.accordion { display: grid; gap: 0.5rem; }

.accordion-item {
  border: 1px solid hsl(240 6% 88% / 0.7);
  border: 1px solid hsl(from var(--border) h s l / 0.7);
  border-left: 3px solid transparent;
  border-radius: 16px;
  background: var(--card-bg);
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
  overflow: hidden;
  transition: border-color 0.2s ease, border-left-color 0.2s ease, box-shadow 0.2s ease;
}
.accordion-item.open {
  border-color: rgba(113, 84, 232, 0.28);
  border-color: hsl(from var(--primary) h s l / 0.28);
  border-left-color: var(--primary);
  box-shadow: 0 6px 20px rgba(113, 84, 232, 0.06);
}
.accordion-trigger:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
  border-radius: 14px;
}

.accordion-trigger {
  width: 100%; min-height: 3.2rem; padding: 0.8rem 1rem;
  display: grid; grid-template-columns: 1.8rem minmax(0, 1fr) 1.2rem;
  align-items: center; gap: 0.6rem;
  text-align: left; color: var(--fg);
  transition: background 0.14s ease;
}
.accordion-trigger:hover { background: hsl(220 18% 95.8% / 0.5); background: hsl(from var(--secondary) h s l / 0.5); }

.accordion-num {
  width: 1.8rem; height: 1.8rem; border-radius: 999px;
  display: grid; place-items: center;
  background: hsl(250 72% 95%); color: var(--primary);
  font-size: 0.65rem; font-weight: 860;
  transition: background 0.18s ease, color 0.18s ease;
}
[data-theme="dark"] .accordion-num { background: hsl(250 30% 18%); }
.accordion-item.open .accordion-num {
  background: var(--primary); color: #fff;
}

.accordion-question {
  font-size: 0.88rem; font-weight: 680; letter-spacing: -0.012em;
  line-height: 1.25; color: var(--fg);
}

.accordion-chevron {
  display: flex; align-items: center; color: var(--muted);
  transition: transform 0.24s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.accordion-item.open .accordion-chevron { transform: rotate(180deg); color: var(--primary); }

.accordion-body {
  padding: 0 1rem 1rem calc(1.8rem + 0.6rem + 1rem);
  animation: fadeIn 0.22s ease both;
}
.accordion-body p {
  margin: 0 0 0.5rem; font-size: 0.82rem; line-height: 1.6; color: var(--muted);
}
.accordion-body p:last-child { margin-bottom: 0; }
.accordion-body strong { color: var(--fg); font-weight: 700; }
.accordion-body .guide-list {
  margin: 0.25rem 0 0.5rem 0; padding-left: 1.2rem;
  display: flex; flex-direction: column; gap: 0.28rem;
}
.accordion-body .guide-list li {
  font-size: 0.82rem; line-height: 1.6; color: var(--muted);
}
.accordion-body ol.guide-list { list-style: decimal; }
.accordion-body ol.guide-list li { padding-left: 0.15rem; }
.accordion-body .guide-list:last-child { margin-bottom: 0; }

/* ═══════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════ */
@keyframes fadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }
@keyframes pageIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ═══════════════════════════════════════════
   DARK MODE — ACCORDION
   ═══════════════════════════════════════════ */
[data-theme="dark"] .accordion-item {
  background: linear-gradient(180deg, hsl(242 10% 13%) 0%, hsl(242 10% 10%) 100%);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.03) inset,
    0 1px 0 rgba(255,255,255,0.05) inset,
    0 4px 14px hsl(242 44% 3% / 0.35);
}
[data-theme="dark"] .accordion-item.open {
  border-color: hsl(252 60% 50% / 0.32);
  border-left-color: var(--primary);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 1px 0 rgba(255,255,255,0.06) inset,
    0 8px 24px rgba(113, 84, 232, 0.15);
}
[data-theme="dark"] .accordion-trigger:hover {
  background: hsl(250 15% 15%);
}
[data-theme="dark"] .accordion-item.open .accordion-num {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(113, 84, 232, 0.3);
}
[data-theme="dark"] .accordion-body p {
  color: var(--muted);
}
[data-theme="dark"] .accordion-body strong {
  color: var(--fg);
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 768px) {
  .page-main { width: min(42rem, calc(100% - 1.2rem)); padding-top: 5.5rem; }
  .page-title { font-size: 1.8rem; }
  .guided-card { padding: 1.2rem; }
  .guided-step-content { min-height: 7rem; }
  .section-hd h2 { font-size: 1.3rem; }
  .accordion-trigger { padding: 0.7rem 0.8rem; }
  .accordion-body { padding-left: calc(1.8rem + 0.6rem + 0.8rem); padding-right: 0.8rem; }
}

/* ═══════════════════════════════════════════
   SUPPORT CTA
   ═══════════════════════════════════════════ */
.support-cta {
  display: grid;
  grid-template-columns: 44px 1fr 16px;
  align-items: center;
  gap: 0.9rem;
  margin: 2.4rem 0 0;
  padding: 1.3rem 1.2rem;
  border: 1px solid #4b3c72;
  border-radius: 20px;
  background: radial-gradient(circle at 16% 0, rgba(255,255,255,0.18), transparent 38%), linear-gradient(135deg, #241f2c, #4b3c72);
  box-shadow: 0 12px 32px rgba(45,39,54,0.18);
  color: #fff;
  text-decoration: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}
.support-cta:hover { transform: translateY(-2px); box-shadow: 0 18px 42px rgba(45,39,54,0.26); }
.support-cta-icon {
  width: 44px; height: 44px; border-radius: 14px;
  background: rgba(255,255,255,0.13);
  display: grid; place-items: center; flex-shrink: 0;
}
.support-cta-body strong { display: block; font-size: 1rem; font-weight: 860; letter-spacing: -0.02em; }
.support-cta-body p { margin: 0.18rem 0 0; font-size: 0.76rem; font-weight: 500; color: rgba(255,255,255,0.7); line-height: 1.4; }
.support-cta-arrow { opacity: 0.7; flex-shrink: 0; }

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
.site-footer-std {
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
}
[data-theme="dark"] .site-footer-std { border-top-color: var(--border); }
.footer-top-std { display: flex; flex-direction: column; align-items: center; gap: 0.35rem; margin-bottom: 0.5rem; }
.footer-links-std { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.3rem 0.6rem; }
.footer-links-std a { font-size: 0.75rem; font-weight: 500; color: var(--muted); transition: color 0.12s ease; }
.footer-links-std a:hover { color: var(--fg); }
.footer-legal-std a { font-size: 0.72rem; color: var(--muted); opacity: 0.72; }
.footer-sep-std { font-size: 0.68rem; color: var(--muted); opacity: 0.5; user-select: none; }
.footer-copy-std { text-align: center; font-size: 0.72rem; color: var(--muted); opacity: 0.7; line-height: 1.4; }
.heart-std { color: #fb7185; }