/* ===========================================================
   TUTORIALS.CSS - Styles for the Tutorials Expanded View
   =========================================================== */

/* Animation */
@keyframes tutorialsFadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes tutorialsWatermarkFade {
  to { opacity: 1; }
}

/* ===== Nav Hide on Scroll ===== */
.ws-nav,
.ws-header-left,
.ws-credits {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.ws-nav.nav-hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

.ws-header-left.nav-hidden,
.ws-credits.nav-hidden {
  transform: translateY(-20px);
  opacity: 0;
  pointer-events: none;
}

.account-shield-ws {
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.account-shield-ws.nav-hidden {
  transform: translateY(-20px);
  opacity: 0;
  pointer-events: none;
}

/* ===== Body State ===== */
body.tutorials-view {
  min-height: 100vh;
  overflow: auto;
  background: var(--bg);
  position: relative;
}

body.tutorials-view::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(14,165,233,.1), transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(139,92,246,.08), transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(236,72,153,.06), transparent 40%);
  pointer-events: none;
  z-index: 0;
}

body.tutorials-view > :not(.expanded-back-to-top) {
  position: relative;
  z-index: 1;
}

body.tutorials-view .timrx-3dprint.workspace {
  display: none;
}

/* Scroll progress bar */
body.tutorials-view::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: rgba(255, 255, 255, 0.3);
  box-shadow: none;
  z-index: 10001;
  transition: width 0.1s ease-out;
}

/* ===== Tutorials Container ===== */
.tutorials-expanded-view {
  display: none;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
  scroll-behavior: smooth;
  background: #0a0a0a;
  min-height: 100vh;
}

body.tutorials-view .tutorials-expanded-view {
  display: block;
  animation: tutorialsFadeInUp .6s ease-out;
}

/* Shell - Clean minimal container */
.tutorials-expanded-shell {
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
  background: #0a0a0a;
  padding: 0;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
}

/* ===== Hero Section ===== */
.tutorials-hero {
  position: relative;
  min-height: clamp(280px, 35vh, 380px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 80px;
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
  animation: tutorialsFadeInUp .8s ease-out .1s forwards;
  opacity: 0;
}

/* Noise texture */
.tutorials-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  mix-blend-mode: overlay;
}

/* Gradient overlay */
.tutorials-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: transparent;
  pointer-events: none;
}

.tutorials-hero-text {
  position: relative;
  z-index: 2;
  flex: 1;
  min-width: 280px;
  max-width: 100%;
  padding: clamp(32px, 5vh, 60px) clamp(24px, 4vw, 60px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Eyebrow pill - clean style */
.tutorials-pill {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 0;
  border-radius: 0;
  background: transparent;
  border: none;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #666;
  margin-bottom: 0;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.tutorials-pill::before {
  content: "";
  width: 36px;
  height: 1px;
  background: linear-gradient(90deg, #666, transparent);
}

.tutorials-hero h1,
.tutorials-title {
  margin: 0;
  font-size: clamp(42px, 8vw, 72px);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: -0.03em;
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
  -webkit-text-fill-color: #fff;
  color: #fff;
}

.tutorials-hero p {
  margin: 0;
  max-width: 600px;
  font-size: clamp(14px, 1rem, 16px);
  line-height: 1.7;
  color: #999;
}

/* Watermark */
.tutorials-watermark {
  position: absolute;
  top: 55%;
  right: 0;
  transform: translateY(-50%);
  font-family: Inter, system-ui, sans-serif;
  font-size: clamp(120px, 18vw, 280px);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.03);
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.04);
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
  line-height: 0.8;
  z-index: 1;
  opacity: 0;
  animation: tutorialsWatermarkFade 1.5s ease forwards 0.5s;
}

/* Hero Stats - clean card style */
.tutorials-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  padding: 0;
  list-style: none;
}

.tutorials-hero-stats li {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  min-width: 80px;
}

.tutorials-hero-stats li span {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
  -webkit-text-fill-color: #fff;
}

.tutorials-hero-stats li small {
  font-size: 10px;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
  max-width: 100px;
  line-height: 1.3;
}

/* Hero Actions */
.tutorials-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* Buttons - clean minimal style */
.tutorials-primary-btn,
.tutorials-secondary-btn {
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.tutorials-primary-btn {
  background: #fff;
  color: #0a0a0a;
  box-shadow: none;
}

.tutorials-primary-btn:hover {
  background: #e5e5e5;
  transform: scale(1.05);
  box-shadow: none;
}

.tutorials-secondary-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ccc;
}

.tutorials-secondary-btn:hover {
  transform: scale(1.05);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

/* Exit Button - Clean style */
.tutorials-exit-btn {
  position: fixed;
  top: 20px;
  right: clamp(24px, 4vw, 60px);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ccc;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 1000;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: none;
}

.tutorials-exit-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  box-shadow: none;
  transform: scale(1.05);
}

/* ===== Sections ===== */
.tutorials-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(32px, 5vh, 60px) clamp(24px, 4vw, 60px);
  animation: tutorialsFadeInUp .8s ease-out forwards;
  opacity: 0;
}

.tutorials-section:nth-of-type(1) { animation-delay: .25s; }
.tutorials-section:nth-of-type(2) { animation-delay: .35s; }
.tutorials-section:nth-of-type(3) { animation-delay: .45s; }
.tutorials-section:nth-of-type(4) { animation-delay: .55s; }
.tutorials-section:nth-of-type(5) { animation-delay: .65s; }
.tutorials-section:nth-of-type(6) { animation-delay: .75s; }
.tutorials-section:nth-of-type(7) { animation-delay: .85s; }

.tutorials-section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.tutorials-section-content {
  flex: 1;
  min-width: 280px;
}

.tutorials-section h2 {
  margin: 0 0 12px;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.02em;
}

.tutorials-section > p,
.tutorials-section-content > p {
  margin: 0;
  color: #999;
  line-height: 1.6;
  max-width: 600px;
  font-size: 14px;
}

/* Section Highlight Badge - Clean style */
.tutorials-highlight {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
  white-space: nowrap;
  flex-shrink: 0;
  animation: none;
  transition: none;
}

/* ===== Cards & Grids ===== */
.tutorials-guides-grid,
.tutorials-resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.tutorials-card {
  padding: 24px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.2s ease;
}

.tutorials-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.tutorials-card__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.tutorials-card__body {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.6;
  color: #999;
}

.tutorials-card__list {
  margin: 0;
  padding: 0 0 0 18px;
  list-style: none;
}

.tutorials-card__list li {
  position: relative;
  padding-left: 8px;
  margin-bottom: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: #888;
}

.tutorials-card__list li::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #666;
}

.tutorials-card__list li:last-child {
  margin-bottom: 0;
}

/* ===== Steps Grid ===== */
.tutorials-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.tutorials-step {
  position: relative;
  padding: 24px 20px 20px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.02);
  text-align: center;
  transition: all 0.2s ease;
}

.tutorials-step:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: none;
}

.tutorials-step:hover > span {
  transform: scale(1.1);
  box-shadow: none;
}

.tutorials-step > span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin: 0 auto 14px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 16px;
  font-weight: 700;
  color: #ccc;
  box-shadow: none;
  transition: transform 0.2s ease;
}

.tutorials-step h3 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
}

.tutorials-step p {
  margin: 0;
  font-size: 13px;
  color: #888;
  line-height: 1.5;
}

/* ===== Video Grid ===== */
.tutorials-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.tutorials-video-card {
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
  transition: all 0.2s ease;
}

.tutorials-video-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.tutorials-video-embed {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: rgba(0, 0, 0, 0.4);
}

.tutorials-video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.tutorials-video-meta {
  padding: 16px 20px;
}

.tutorials-video-meta h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.tutorials-video-meta p {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: #888;
}

/* ===== Tip List ===== */
.tutorials-tip-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 10px;
}

.tutorials-tip-list li {
  position: relative;
  padding: 12px 16px 12px 20px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  line-height: 1.5;
  color: #999;
  transition: all 0.2s ease;
}

.tutorials-tip-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: 2px 0 0 2px;
  background: #444;
  transition: background 0.2s ease;
}

.tutorials-tip-list li:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.tutorials-tip-list li:hover::before {
  background: #888;
}

/* ===== Best Practices Grid ===== */
.tutorials-best-practices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.tutorials-practice-card {
  position: relative;
  overflow: hidden;
  padding: 24px 24px 24px 80px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-align: left;
  transition: all 0.2s ease;
}

.tutorials-practice-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.practice-icon {
  position: absolute;
  left: 20px;
  top: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 24px;
  line-height: 1;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.3s ease;
}

.tutorials-practice-card:hover .practice-icon {
  transform: scale(1.08);
  box-shadow: none;
}

.tutorials-practice-card h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.tutorials-practice-card > p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.5;
  color: #888;
}

.practice-tips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.practice-tips li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.7);
}

.practice-tips li::before {
  content: "";
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  margin-top: 5px;
  border-radius: 50%;
  background: #666;
}

/* ===== FAQ Grid ===== */
.tutorials-faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.tutorials-faq-card {
  padding: 20px 24px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.2s ease;
}

.tutorials-faq-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.tutorials-faq-card h3 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  line-height: 1.4;
}

.tutorials-faq-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== Split Layout with 3D Model ===== */
.tutorials-section--with-model {
  max-width: 1400px;
}

.tutorials-split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 20px;
  align-items: stretch;
}

.tutorials-split-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  order: 2;
}

.tutorials-split-model {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: stretch;
  min-height: 400px;
  background: transparent;
  border: none;
  order: 1;
}

.tutorials-split-model .tutorial-3d-viewer {
  width: 100%;
  height: 100%;
  min-height: 400px;
  flex: 1;
  background: transparent;
  border-radius: 12px;
  overflow: visible;
  display: block;
}

.tutorial-inline-model {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  height: 100%;
  min-height: inherit;
  padding: 14px;
  border-radius: 18px;
  background:
    radial-gradient(circle at top right, rgba(56, 189, 248, 0.1), transparent 34%),
    linear-gradient(180deg, rgba(15, 15, 18, 0.96), rgba(9, 9, 11, 0.98));
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    0 24px 46px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.tutorial-inline-model::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.04), transparent 28%),
    radial-gradient(circle at bottom left, rgba(99, 102, 241, 0.08), transparent 32%);
  pointer-events: none;
}

.tutorial-inline-model__head,
.tutorial-inline-model__frame {
  position: relative;
  z-index: 1;
}

.tutorial-inline-model__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.tutorial-inline-model__tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tutorial-inline-model__tab {
  appearance: none;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
  color: rgba(255, 255, 255, 0.56);
  font: inherit;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tutorial-inline-model__tab:hover {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.85);
}

.tutorial-inline-model__tab.is-active {
  background: rgba(56, 189, 248, 0.14);
  border-color: rgba(56, 189, 248, 0.32);
  color: #d8f6ff;
}

.tutorial-inline-model__swap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.34);
  white-space: nowrap;
}

.tutorial-inline-model__swap::before {
  content: "";
  width: 18px;
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.tutorial-inline-model__frame {
  position: relative;
  flex: 1;
  min-height: 0;
}

.tutorial-inline-model__stage {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  min-height: 360px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(17, 17, 20, 0.96), rgba(10, 10, 12, 0.98));
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.tutorial-inline-model__stage:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.22);
  box-shadow: 0 18px 34px rgba(0, 0, 0, 0.3);
}

.tutorial-inline-model.is-swapping .tutorial-inline-model__stage {
  transform: scale(0.988);
}

.tutorial-inline-model__media,
.tutorial-inline-model__media-inner {
  position: absolute;
  inset: 0;
}

.tutorial-inline-model__media {
  overflow: hidden;
}

.tutorial-inline-model__media-inner {
  animation: tutorialModelFade 0.3s ease;
}

@keyframes tutorialModelFade {
  from {
    opacity: 0;
    transform: scale(0.985);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.tutorial-inline-model__media model-viewer,
.tutorial-inline-model__media img {
  width: 100%;
  height: 100%;
  display: block;
}

.tutorial-inline-model__media model-viewer {
  --poster-color: transparent;
  background:
    radial-gradient(circle at 50% 30%, rgba(255, 255, 255, 0.08), transparent 38%),
    linear-gradient(180deg, #0f1117, #090a0d);
  pointer-events: none;
}

.tutorial-inline-model__media model-viewer::part(default-progress-bar) {
  display: none;
}

.tutorial-inline-model__media img {
  object-fit: cover;
  transform: scale(1.01);
}

.tutorial-inline-model__shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(4, 5, 8, 0.02) 0%, rgba(4, 5, 8, 0.08) 46%, rgba(4, 5, 8, 0.86) 100%);
  pointer-events: none;
}

.tutorial-inline-model__caption {
  position: absolute;
  right: 16px;
  bottom: 16px;
  left: 16px;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 7px;
  align-items: flex-start;
  text-align: left;
}

.tutorial-inline-model__badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.78);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tutorial-inline-model__badge[data-state="refined"] {
  color: #8fe6ff;
  border-color: rgba(56, 189, 248, 0.25);
  background: rgba(56, 189, 248, 0.1);
}

.tutorial-inline-model__badge[data-state="reference"] {
  color: #f4d3a1;
  border-color: rgba(245, 158, 11, 0.24);
  background: rgba(245, 158, 11, 0.1);
}

.tutorial-inline-model__badge[data-state="model"],
.tutorial-inline-model__badge[data-state="preview"] {
  color: #d7f6ff;
}

.tutorial-inline-model__title {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #fff;
}

.tutorial-inline-model__copy {
  max-width: 34ch;
  font-size: 13px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.72);
}

.model-toggle-hint {
  display: block;
  text-align: center;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.46);
  margin-top: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s ease;
}

.tutorials-split-model:hover .model-toggle-hint {
  color: rgba(255, 255, 255, 0.68);
}

.model-toggle-hint.refined {
  color: #8fe6ff;
}

/* Model position modifiers */
.tutorials-section--model-right .tutorials-split-cards {
  order: 1;
}

.tutorials-section--model-right .tutorials-split-model {
  order: 2;
}

/* Grid layout for cards with image */
.tutorials-split-cards--grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Grid with extra card below */
.tutorials-split-cards--grid-with-extra {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.tutorials-card--span-full {
  grid-column: 1 / -1;
}

/* Layout with extra card - align heights */
.tutorials-split-layout--with-extra {
  align-items: stretch;
}

.tutorials-split-model--tall {
  min-height: 0;
}

.tutorials-split-model--tall .tutorial-3d-viewer {
  height: 100%;
  min-height: 650px;
}

.tutorials-reference-img {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tutorials-reference-img[data-target-viewer] {
  cursor: pointer;
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.tutorials-reference-img[data-target-viewer]:hover,
.tutorials-reference-img[data-target-viewer].is-view-active {
  transform: translateY(-3px);
  border-color: rgba(245, 158, 11, 0.26);
  box-shadow: 0 16px 30px rgba(0, 0, 0, 0.22);
}

.tutorials-reference-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.reference-label {
  position: absolute;
  bottom: 10px;
  left: 10px;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.6);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #888;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

/* Model with explained card wrapper */
.tutorials-split-model-wrapper {
  display: flex;
  flex-direction: column;
  gap: 16px;
  order: 1;
}

.tutorials-split-model-wrapper .tutorials-split-model {
  order: unset;
  position: relative;
  top: 0;
}

/* Explained card styling */
.tutorials-card--explained {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.tutorials-card__subtitle {
  margin: 12px 0 8px;
  font-size: 12px;
  font-weight: 600;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Remesh comparison */
.remesh-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0 8px;
}

.remesh-comparison__item {
  position: relative;
  padding: 12px;
  margin-top: 30px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
  cursor: help;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.remesh-comparison__item[role="button"] {
  cursor: pointer;
}

.remesh-comparison__item:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
}

.remesh-comparison__item.is-view-active {
  border-color: rgba(56, 189, 248, 0.28);
  background: rgba(56, 189, 248, 0.08);
}

.remesh-comparison__item.is-view-active strong {
  color: #d8f6ff;
}

.remesh-comparison__item.is-view-active span {
  color: rgba(255, 255, 255, 0.78);
}

.remesh-comparison__item strong {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: #ccc;
  margin-bottom: 4px;
}

.remesh-comparison__item span {
  font-size: 11px;
  color: #666;
  line-height: 1.4;
}

/* Tooltip popup */
.remesh-comparison__item::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(5px);
  width: max-content;
  max-width: 220px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(20, 20, 20, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 11px;
  line-height: 1.5;
  color: #aaa;
  text-align: left;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  pointer-events: none;
  z-index: 10;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

/* Tooltip arrow */
.remesh-comparison__item::before {
  content: "";
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: rgba(20, 20, 20, 0.95);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  z-index: 11;
}

.remesh-comparison__item:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.remesh-comparison__item:hover::before {
  opacity: 1;
  visibility: visible;
}

/* Check list style */
.tutorials-card__list--check li::before {
  content: "✓";
  position: absolute;
  left: -16px;
  top: 0;
  width: auto;
  height: auto;
  border-radius: 0;
  background: none;
  font-size: 11px;
  color: #666;
}

/* ===========================================================
   MESHY-STYLE MODEL SHOWCASE CARDS
   Hover-to-animate using CSS sprite sheets (no WebGL)
   =========================================================== */

/* Model showcase grid */
.tutorials-model-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

/* Individual model card */
.tutorials-model-card {
  position: relative;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
  cursor: pointer;
  transition:
    transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.3s ease,
    box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.tutorials-model-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.08);
}

.tutorials-model-card:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px #0ea5e9;
}

/* Thumbnail container with aspect ratio */
.tutorials-model-card__thumb {
  position: relative;
  aspect-ratio: 1;
  background: linear-gradient(145deg, #0d0d0d, #151515);
  overflow: hidden;
}

/* Static poster image */
.tutorials-model-card__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: transparent;
  transition: opacity 0.3s ease;
  z-index: 1;
}

/* Sprite animation container - hidden by default */
.tutorials-model-card__sprite {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: 0% 0%;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
  /* Animation paused by default */
  animation: spriteRotate 1.2s steps(24) infinite paused;
}

/* On hover: hide poster, show animated sprite */
.tutorials-model-card:hover .tutorials-model-card__poster {
  opacity: 0;
}

.tutorials-model-card:hover .tutorials-model-card__sprite {
  opacity: 1;
  animation-play-state: running;
}

/* Sprite animation keyframes - for horizontal sprite sheet (24 frames) */
@keyframes spriteRotate {
  from { background-position: 0% 0%; }
  to { background-position: 100% 0%; }
}

/* Alternative: vertical sprite sheet */
@keyframes spriteRotateVertical {
  from { background-position: 0% 0%; }
  to { background-position: 0% 100%; }
}

/* Fallback: video-based rotation (if video available) */
.tutorials-model-card__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.tutorials-model-card:hover .tutorials-model-card__video {
  opacity: 1;
}

/* Badge for model type (textured/refined/preview) */
.tutorials-model-card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 5px 10px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.75);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #888;
  z-index: 5;
  transition: color 0.2s ease, background 0.2s ease;
}

.tutorials-model-card:hover .tutorials-model-card__badge {
  background: rgba(0, 0, 0, 0.85);
  color: #aaa;
}

.tutorials-model-card__badge--refined {
  color: #0ea5e9;
}

.tutorials-model-card__badge--textured {
  color: #8b5cf6;
}

.tutorials-model-card__badge--preview {
  color: #f59e0b;
}

/* Hover overlay with view action */
.tutorials-model-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 4;
}

.tutorials-model-card:hover .tutorials-model-card__overlay {
  opacity: 1;
}

.tutorials-model-card__overlay svg {
  width: 36px;
  height: 36px;
  color: white;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.tutorials-model-card__overlay span {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: white;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

/* Card content/meta section */
.tutorials-model-card__content {
  padding: 14px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.tutorials-model-card__title {
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tutorials-model-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: #666;
}

.tutorials-model-card__meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tutorials-model-card__meta svg {
  width: 12px;
  height: 12px;
}

/* Hint text below card */
.tutorials-model-card__hint {
  display: block;
  padding: 10px 14px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  transition: color 0.2s ease;
}

.tutorials-model-card:hover .tutorials-model-card__hint {
  color: rgba(255, 255, 255, 0.6);
}

/* Placeholder when image fails to load */
.tutorials-model-card__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, rgba(255,255,255,0.02), rgba(255,255,255,0.05));
  color: rgba(255, 255, 255, 0.3);
  font-size: 13px;
  font-weight: 500;
}

/* model-viewer inside cards */
.tutorials-model-card__thumb model-viewer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  --poster-color: transparent;
}

.tutorials-model-card__thumb model-viewer::part(default-progress-bar) {
  display: none;
}

/* Inline tutorial split viewers */
.tutorials-split-model model-viewer {
  width: 100%;
  height: 100%;
  min-height: 300px;
  border-radius: 14px;
  background: linear-gradient(145deg, #0d0d0d, #151515);
}

/* Loading shimmer effect */
.tutorials-model-card--loading .tutorials-model-card__thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.04),
    transparent
  );
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}