/* -- PlayGridyGame How to Solve Page Styles -- */

.howtosolve-hero {
  margin-bottom: var(--space-5);
  background: linear-gradient(95deg, #ffe8fa 20%, #ddecfd 90%);
  box-shadow: var(--shadow-lg);
  border: 2px dashed var(--color-primary);
  text-align: center;
}
.howtosolve-hero .lead {
  font-size: var(--font-size-lg);
  color: var(--color-gray-700);
  margin: var(--space-3) auto 0;
}

.howtosolve-section {
  margin-bottom: var(--space-8);
  margin-top: var(--space-8);
}

.hts-beginner-steps {
  grid-template-columns: 2fr 1fr;
  gap: var(--space-8);
  align-items: flex-start;
}
.hts-step-list {
  padding-left: 0;
  font-size: var(--font-size-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  counter-reset: hts-steps;
}
.hts-step-list li {
  background: var(--color-surface);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  counter-increment: hts-steps;
  padding-left: 3em;
}
.hts-step-list li::before {
  content: counter(hts-steps, decimal-leading-zero) ".";
  position: absolute;
  left: var(--space-4);
  top: 1.1em;
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: 800;
}
.hts-hero-figure img {
  display: block;
  max-width: 68%;
  height: auto;
  margin: 0 auto;
}
.hts-tips {
  max-width: 320px;
  font-size: var(--font-size-base);
  margin-left: auto;
  margin-right: auto;
}
.hts-tips h3 {
  color: var(--color-success);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-2);
}

/* --- Strategies --- */
.hts-strategies-list {
  display: grid;
  gap: var(--space-4);
  max-width: 700px;
  margin: 0 auto;
}
.expandable-card {
  border: 2px solid var(--color-gray-300);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: var(--space-4);
  margin-bottom: 0;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.expandable-card[aria-expanded="true"] {
  border-color: var(--color-success);
  box-shadow: var(--shadow-md);
  background: linear-gradient(88deg, #fff, #e7e3f7 70%) !important;
}
.expand-toggle {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  background: none;
  border: none;
  outline: none;
  width: 100%;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-family-sans);
  font-weight: 700;
  cursor: pointer;
}
.arrow {
  transition: transform 0.24s;
  font-size: 1.3em;
  margin-left: auto;
  color: var(--color-gray-700);
}
.expandable-card[aria-expanded="true"] .arrow {
  transform: rotate(180deg);
}
.expand-details {
  margin-top: var(--space-4);
  color: var(--color-gray-900);
  font-size: var(--font-size-base);
  animation: fadeIn 0.34s;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.hts-strategy figure {
  margin: var(--space-3) 0 0 0;
}
.hts-strategy img {
  width: 180px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

/* --- Modes --- */
.hts-modes-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
}
.mode-card {
  border-left: 5px solid var(--color-primary);
  background: linear-gradient(88deg, #fff, #f6f5fa 60%);
  text-align: left;
}
.mode-icon {
  font-size: 1.4em;
  vertical-align: middle;
  margin-right: 0.19em;
}
.hts-mode-tip {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-success);
  margin-top: var(--space-1);
}
.hts-cta {
  margin-top: var(--space-2);
  font-size: var(--font-size-sm);
}

/* --- Visual Clues & Aids --- */
.hts-aids-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}
.aid-card {
  text-align: center;
  min-width: 210px;
}
.aid-card img {
  margin: 0 auto;
  margin-bottom: var(--space-2);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  object-fit: cover;
}

/* --- Demo: Animated Walkthrough --- */
.hts-demo {
  gap: var(--space-4);
  align-items: center;
  justify-items: center;
}
.demo-animation-area {
  margin-bottom: var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.demo-board-bg {
  position: relative;
  display: inline-block;
}
.demo-callout {
  position: absolute;
  left: 14%;
  top: 12%;
  background: var(--color-warning);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  min-width: 130px;
  box-shadow: var(--shadow-sm);
  opacity: 0.57;
  transition: opacity 0.4s;
  pointer-events: none;
  z-index: 1;
}
.demo-callout .callout-label {
  font-weight: 800;
  display: block;
  color: var(--color-primary);
}
.demo-callout .callout-tip {
  display: block;
  font-weight: 400;
  font-size: var(--font-size-xs);
}
.demo-step1 { top: 9%; left: 14%; animation: fadeIn 1.2s 0.1s forwards; }
.demo-step2 { top: 41%; left: 56%; animation: fadeIn 1.2s 1.1s forwards; }
.demo-step3 { top: 72%; left: 30%; animation: fadeIn 1.2s 2.0s forwards; }

/* --- Community Carousel --- */
.hts-community-carousel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-3);
  position: relative;
  min-height: 170px;
}
.carousel-track {
  min-width: 270px;
  width: 320px;
  max-width: 100vw;
  display: flex;
  overflow-x: hidden;
  transition: transform 0.4s;
}
.carousel-tip {
  min-width: 100%;
  padding: var(--space-4);
  font-size: var(--font-size-lg);
  color: var(--color-gray-900);
  background: linear-gradient(90deg, #f6f5fa, #ffe8fa 120%);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.carousel-arrow {
  background: var(--color-primary);
  color: #fff;
  border-radius: 100%;
  width: 38px; height: 38px;
  border: none;
  font-size: 1.5em;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center; justify-content: center;
  transition: background 0.2s, box-shadow 0.2s;
}
.carousel-arrow:active, .carousel-arrow:focus-visible {
  background: var(--color-success);
  outline: 2px solid var(--color-warning);
}

.hts-tip-submit-area {
  padding: var(--space-4);
  margin-top: var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-width: 490px;
  margin-left: auto;
  margin-right: auto;
}
.tip-form label {
  font-size: var(--font-size-sm);
  margin-bottom: 2px;
}
.tip-form textarea, .tip-form input[type="text"] {
  margin-bottom: var(--space-3);
  width: 100%;
  font-size: var(--font-size-base);
}
.tip-success {
  color: var(--color-success);
  margin-top: var(--space-3);
  font-size: var(--font-size-base);
  display: block;
  font-weight: 600;
}

/* --- FAQ --- */
.hts-faq-list {
  max-width: 700px;
  margin: 0 auto;
  font-size: var(--font-size-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.faq-item {
  border: 2px solid var(--color-gray-300);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 0;
}
.faq-item[aria-expanded="true"] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
.faq-item .expand-toggle {
  font-size: var(--font-size-base);
  font-weight: bold;
  color: var(--color-primary);
  padding: var(--space-3);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
}
.faq-item .expand-toggle:focus-visible {
  outline: 2px dashed var(--color-primary);
}
.faq-item .expand-details {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-gray-100);
}

/* --------- Animations --------- */
.animate-in {
  animation: fadeInUp 0.7s;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .hts-beginner-steps {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  .hts-aids-grid, .hts-modes-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  .carousel-track {
    width: 95vw;
    min-width: 190px;
  }
}
@media (max-width: 600px) {
  .howtosolve-hero {
    font-size: var(--font-size-sm);
    padding: var(--space-3) !important;
  }
  .hts-tip-submit-area {
    padding: var(--space-3);
  }
}