:root {
  --mint: #e6f7f4;
  --mint-dark: #c6eae2;
  --mint-gradient: linear-gradient(120deg, #e6f7f4 0%, #f5fcfa 100%);
  --mint-gradient-soft: linear-gradient(120deg, rgba(230,247,244,0.85) 0%, rgba(245,252,250,0.85) 100%);
  --mint-gradient-faint: linear-gradient(120deg, rgba(230,247,244,0.30) 0%, rgba(245,252,250,0.30) 100%);
  --red: #ff3b3f;
  --red-hover: #e02d32;
  --red-light: #ffb3b5;
  --text-main: #222;
  --text-muted: #6e7c7a;
  --card-bg: #fff;
  --shadow: 0 4px 24px 0 rgba(80,120,110,0.07), 0 1.5px 6px 0 rgba(80,120,110,0.06);
  --shadow-hover: 0 6px 32px 0 rgba(80,120,110,0.10), 0 2px 8px 0 rgba(80,120,110,0.09);
  --border-radius: 18px;
  --border-radius-lg: 32px;
  --border-radius-sm: 10px;
  --border: 1px solid var(--red);
  --transition: all 0.22s cubic-bezier(.5,.2,.3,1);
  --max-width: 1240px;
  --font-main: 'Inter', 'Segoe UI', Arial, sans-serif;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  font-size: 14px;
  color: var(--text-main);
  background: var(--mint-gradient);
  min-height: 100vh;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body.stickerbookpuzzle-body {
  background: var(--mint-gradient-soft);
  min-height: 100vh;
  letter-spacing: 0.01em;
}

.stickerbookpuzzle-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.stickerbookpuzzle-header {
  background: var(--mint-gradient-faint);
  box-shadow: var(--shadow);
  border-bottom: none;
}

.stickerbookpuzzle-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px 10px 24px;
}

.stickerbookpuzzle-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.stickerbookpuzzle-logo__img {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(80,120,110,0.12);
  background: #fff;
  object-fit: cover;
}

.stickerbookpuzzle-logo__title {
  font-size: 1.22em;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.01em;
}

.stickerbookpuzzle-nav {
  margin-left: 36px;
}

.stickerbookpuzzle-nav__list {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.stickerbookpuzzle-nav__item {}

.stickerbookpuzzle-nav__link {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  position: relative;
}
.stickerbookpuzzle-nav__link:hover,
.stickerbookpuzzle-nav__link:focus {
  color: var(--red);
  background: rgba(255,59,63,0.08);
  box-shadow: 0 2px 8px rgba(255,59,63,0.10);
}

.stickerbookpuzzle-main {
  margin-top: 0;
  padding-bottom: 60px;
}

/* HERO SECTION */
.stickerbookpuzzle-hero {
  background: var(--mint-gradient-faint);
  padding: 48px 0 38px 0;
  box-shadow: var(--shadow);
}
.stickerbookpuzzle-hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  align-items: stretch;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.stickerbookpuzzle-hero__column--left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 20px;
}
.stickerbookpuzzle-hero__title {
  font-size: 2.0em;
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: 0.01em;
}
.stickerbookpuzzle-hero__tagline {
  font-size: 1.08em;
  color: var(--red);
  font-weight: 500;
  margin-bottom: 18px;
}

.stickerbookpuzzle-hero__summary {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 18px 22px 16px 22px;
  margin-bottom: 12px;
  font-size: 1em;
  color: var(--text-main);
}
.stickerbookpuzzle-hero__meta {
  margin: 14px 0 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.96em;
}
.stickerbookpuzzle-hero__meta li {
  position: relative;
  padding-left: 14px;
}
.stickerbookpuzzle-hero__meta li::before {
  content: '';
  display: block;
  position: absolute;
  left: 0; top: 7px;
  width: 6px; height: 6px;
  background: var(--red);
  border-radius: 50%;
}

.stickerbookpuzzle-hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
}
.stickerbookpuzzle-btn {
  background: var(--red);
  color: #fff;
  border: none;
  border-radius: var(--border-radius-sm);
  padding: 10px 24px;
  font-size: 1em;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-decoration: none;
  outline: none;
  display: inline-block;
  position: relative;
}
.stickerbookpuzzle-btn:hover,
.stickerbookpuzzle-btn:focus {
  background: #fff;
  color: var(--red);
  box-shadow: var(--shadow-hover);
  border: var(--border);
}
.stickerbookpuzzle-btn--alt {
  background: #fff;
  color: var(--red);
  border: var(--border);
}
.stickerbookpuzzle-btn--alt:hover,
.stickerbookpuzzle-btn--alt:focus {
  background: var(--red);
  color: #fff;
}
.stickerbookpuzzle-btn--alt2 {
  background: var(--mint-dark);
  color: var(--red);
  border: none;
}
.stickerbookpuzzle-btn--alt2:hover,
.stickerbookpuzzle-btn--alt2:focus {
  background: var(--red);
  color: #fff;
}
.stickerbookpuzzle-btn--alt3 {
  background: #fff;
  color: var(--red);
  border: var(--border);
}
.stickerbookpuzzle-btn--alt3:hover,
.stickerbookpuzzle-btn--alt3:focus {
  background: var(--red);
  color: #fff;
}
.stickerbookpuzzle-btn--primary {
  background: var(--red);
  color: #fff;
}
.stickerbookpuzzle-btn--primary:hover,
.stickerbookpuzzle-btn--primary:focus {
  background: #fff;
  color: var(--red);
  border: var(--border);
}
.stickerbookpuzzle-btn--secondary {
  background: #fff;
  color: var(--red);
  border: var(--border);
}
.stickerbookpuzzle-btn--secondary:hover,
.stickerbookpuzzle-btn--secondary:focus {
  background: var(--red);
  color: #fff;
}

.stickerbookpuzzle-hero__column--right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.stickerbookpuzzle-hero__card {
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 18px 18px 12px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 260px;
  max-width: 370px;
  width: 100%;
  gap: 14px;
}
.stickerbookpuzzle-hero__image {
  width: 100%;
  max-width: 320px;
  max-height: 240px;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 12px rgba(80,120,110,0.10);
}
.stickerbookpuzzle-hero__notes {
  font-size: 0.97em;
  color: var(--text-muted);
  margin-top: 4px;
}

/* WORLD SECTION */
.stickerbookpuzzle-world {
  background: var(--mint-gradient);
  padding: 54px 0 44px 0;
}
.stickerbookpuzzle-world__inner {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 44px;
  align-items: stretch;
  margin-top: 18px;
}
.stickerbookpuzzle-world__media {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.stickerbookpuzzle-world__image {
  width: 100%;
  max-width: 340px;
  max-height: 300px;
  object-fit: cover;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
}
.stickerbookpuzzle-world__content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 28px 36px 24px 36px;
}
.stickerbookpuzzle-list {
  margin: 10px 0 0 0;
  padding: 0;
  list-style: none;
}
.stickerbookpuzzle-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 7px;
  color: var(--text-main);
}
.stickerbookpuzzle-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 7px;
  width: 7px; height: 7px;
  background: var(--red);
  border-radius: 50%;
  opacity: 0.7;
}

/* HEADINGS */
.stickerbookpuzzle-heading {
  font-size: 1.55em;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
  letter-spacing: 0.01em;
}
.stickerbookpuzzle-subheading {
  font-size: 1.08em;
  font-weight: 700;
  margin-top: 12px;
  margin-bottom: 7px;
  color: var(--red);
}

/* HOWTO SECTION */
.stickerbookpuzzle-howto {
  background: var(--mint-gradient-faint);
  padding: 54px 0 44px 0;
}
.stickerbookpuzzle-howto__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: stretch;
  margin-top: 18px;
}
.stickerbookpuzzle-howto__steps {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 28px 32px 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.stickerbookpuzzle-steps {
  margin: 8px 0 0 0;
  padding: 0 0 0 18px;
  color: var(--text-main);
}
.stickerbookpuzzle-steps li {
  margin-bottom: 7px;
}
.stickerbookpuzzle-howto__systems {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.stickerbookpuzzle-card {
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 20px 24px 16px 24px;
  margin-bottom: 0;
  transition: var(--transition);
  border-left: 3px solid var(--mint-dark);
}
.stickerbookpuzzle-card__title {
  font-size: 1em;
  font-weight: 700;
  color: var(--red);
  margin-bottom: 6px;
}
.stickerbookpuzzle-card__text {
  color: var(--text-main);
  font-size: 0.98em;
}

/* SCREENSHOTS SECTION */
.stickerbookpuzzle-screenshots {
  background: var(--mint-gradient);
  padding: 54px 0 44px 0;
}
.stickerbookpuzzle-lead {
  color: var(--text-muted);
  font-size: 1em;
  margin-bottom: 18px;
}
.stickerbookpuzzle-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 24px;
}
.stickerbookpuzzle-gallery__item {
  background: var(--card-bg);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow);
  padding: 12px 12px 10px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition);
}
.stickerbookpuzzle-gallery__item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px) scale(1.025);
}
.stickerbookpuzzle-gallery__img {
  width: 100%;
  max-width: 220px;
  max-height: 140px;
  object-fit: cover;
  border-radius: var(--border-radius);
  margin-bottom: 9px;
  box-shadow: 0 2px 8px rgba(80,120,110,0.10);
}
.stickerbookpuzzle-gallery__caption {
  color: var(--text-muted);
  font-size: 0.98em;
  text-align: center;
  margin-top: 0;
}

/* FEATURES SECTION */
.stickerbookpuzzle-features {
  background: var(--mint-gradient-faint);
  padding: 50px 0 40px 0;
}
.stickerbookpuzzle-features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 18px;
}
.stickerbookpuzzle-feature {
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 22px 24px 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 160px;
  transition: var(--transition);
}
.stickerbookpuzzle-feature__title {
  color: var(--red);
  font-size: 1.01em;
  font-weight: 700;
  margin-bottom: 5px;
}
.stickerbookpuzzle-feature__text {
  color: var(--text-main);
  font-size: 0.98em;
}

/* EXPERIENCE SECTION */
.stickerbookpuzzle-experience {
  background: var(--mint-gradient);
  padding: 50px 0 40px 0;
}
.stickerbookpuzzle-experience__cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 18px;
}
.stickerbookpuzzle-experience__col {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 26px 34px 22px 34px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* OPINIONS SECTION */
.stickerbookpuzzle-opinions {
  background: var(--mint-gradient-faint);
  padding: 50px 0 40px 0;
}
.stickerbookpuzzle-opinions__list {
  display: flex;
  flex-direction: row;
  gap: 22px;
  margin-top: 18px;
  flex-wrap: wrap;
}
.stickerbookpuzzle-opinion {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 18px 22px 14px 22px;
  min-width: 210px;
  max-width: 340px;
  flex: 1 1 220px;
  font-size: 0.99em;
  color: var(--text-main);
  transition: var(--transition);
}
.stickerbookpuzzle-opinion__text {
  color: var(--text-main);
  font-style: italic;
}

.stickerbookpuzzle-opinions__summary {
  margin-top: 22px;
  background: var(--mint-gradient);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow);
  padding: 14px 18px 10px 18px;
  color: var(--text-muted);
  font-size: 0.98em;
}

/* FAQ SECTION */
.stickerbookpuzzle-faq {
  background: var(--mint-gradient);
  padding: 50px 0 40px 0;
}
.stickerbookpuzzle-faq__list {
  margin-top: 18px;
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 28px 38px 18px 38px;
  font-size: 1em;
}
.stickerbookpuzzle-faq__q {
  font-weight: 700;
  color: var(--red);
  margin-top: 18px;
  margin-bottom: 4px;
}
.stickerbookpuzzle-faq__a {
  color: var(--text-main);
  margin-bottom: 8px;
  font-size: 0.98em;
}

/* CTA SECTION */
.stickerbookpuzzle-cta {
  background: var(--mint-gradient-faint);
  padding: 54px 0 44px 0;
}
.stickerbookpuzzle-cta__box {
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: 38px 44px 30px 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  max-width: 640px;
  margin: 0 auto;
}
.stickerbookpuzzle-cta__title {
  font-size: 1.45em;
  font-weight: 800;
  color: var(--red);
  margin-bottom: 6px;
}
.stickerbookpuzzle-cta__text {
  color: var(--text-main);
  font-size: 1em;
  text-align: center;
  margin-bottom: 12px;
}
.stickerbookpuzzle-cta__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 8px;
}

/* FOOTER */
.stickerbookpuzzle-footer {
  background: var(--mint-gradient);
  box-shadow: 0 -2px 16px rgba(80,120,110,0.07);
  padding: 0;
  margin-top: 0;
}
.stickerbookpuzzle-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 18px 24px;
  display: grid;
  grid-template-columns: 2.2fr 1.2fr 1fr;
  gap: 38px;
}
.stickerbookpuzzle-footer__col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.stickerbookpuzzle-footer__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05em;
  color: var(--red);
}
.stickerbookpuzzle-footer__logoimg {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
  background: #fff;
  box-shadow: 0 1px 6px rgba(80,120,110,0.13);
}
.stickerbookpuzzle-footer__about {
  color: var(--text-muted);
  font-size: 0.97em;
  margin-top: 8px;
}
.stickerbookpuzzle-footer__heading {
  color: var(--red);
  font-size: 1em;
  font-weight: 700;
  margin-bottom: 8px;
  margin-top: 0;
}
.stickerbookpuzzle-footer__links,
.stickerbookpuzzle-footer__anchors {
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.stickerbookpuzzle-footer__links a,
.stickerbookpuzzle-footer__anchors a {
  color: var(--text-main);
  text-decoration: none;
  padding: 2px 0;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  font-size: 0.98em;
}
.stickerbookpuzzle-footer__links a:hover,
.stickerbookpuzzle-footer__anchors a:hover {
  color: var(--red);
  background: rgba(255,59,63,0.08);
  box-shadow: 0 2px 8px rgba(255,59,63,0.10);
}
.stickerbookpuzzle-footer__bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.94em;
  padding: 12px 0 18px 0;
  border-top: 1px solid rgba(255,59,63,0.08);
  margin-top: 0;
}

/* RESPONSIVE */
@media (max-width: 1080px) {
  .stickerbookpuzzle-header__inner {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 14px 10px 14px;
  }
  .stickerbookpuzzle-hero__grid,
  .stickerbookpuzzle-world__inner,
  .stickerbookpuzzle-howto__grid,
  .stickerbookpuzzle-experience__cols,
  .stickerbookpuzzle-footer__inner {
    grid-template-columns: 1fr 1fr !important;
    gap: 24px !important;
  }
  .stickerbookpuzzle-hero__card,
  .stickerbookpuzzle-world__content,
  .stickerbookpuzzle-howto__steps,
  .stickerbookpuzzle-experience__col {
    padding-left: 18px;
    padding-right: 18px;
  }
  .stickerbookpuzzle-cta__box {
    padding: 28px 18px 20px 18px;
  }
}
@media (max-width: 820px) {
  .stickerbookpuzzle-header__inner {
    flex-direction: column;
    gap: 18px;
    align-items: flex-start;
    padding: 12px 8px 8px 8px;
  }
  .stickerbookpuzzle-nav__list {
    flex-wrap: wrap;
    gap: 10px;
  }
  .stickerbookpuzzle-hero__grid,
  .stickerbookpuzzle-world__inner,
  .stickerbookpuzzle-howto__grid,
  .stickerbookpuzzle-experience__cols,
  .stickerbookpuzzle-footer__inner {
    grid-template-columns: 1fr !important;
    gap: 18px !important;
  }
  .stickerbookpuzzle-hero__column--right,
  .stickerbookpuzzle-world__media {
    justify-content: center;
  }
  .stickerbookpuzzle-gallery {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
  }
  .stickerbookpuzzle-footer__inner {
    padding: 24px 8px 12px 8px;
  }
}
@media (max-width: 540px) {
  .stickerbookpuzzle-header__inner {
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
    padding: 10px 4px 6px 4px;
  }
  .stickerbookpuzzle-logo__img {
    width: 28px;
    height: 28px;
  }
  .stickerbookpuzzle-logo__title {
    font-size: 1em;
  }
  .stickerbookpuzzle-nav__list {
    gap: 7px;
    font-size: 0.98em;
  }
  .stickerbookpuzzle-hero,
  .stickerbookpuzzle-world,
  .stickerbookpuzzle-howto,
  .stickerbookpuzzle-screenshots,
  .stickerbookpuzzle-features,
  .stickerbookpuzzle-experience,
  .stickerbookpuzzle-opinions,
  .stickerbookpuzzle-faq,
  .stickerbookpuzzle-cta {
    padding: 24px 0 18px 0;
  }
  .stickerbookpuzzle-hero__card,
  .stickerbookpuzzle-world__content,
  .stickerbookpuzzle-howto__steps,
  .stickerbookpuzzle-experience__col,
  .stickerbookpuzzle-cta__box,
  .stickerbookpuzzle-faq__list {
    padding: 12px 6px 10px 6px;
  }
  .stickerbookpuzzle-heading {
    font-size: 1.13em;
  }
  .stickerbookpuzzle-subheading {
    font-size: 1em;
  }
  .stickerbookpuzzle-footer__inner {
    padding: 14px 2px 8px 2px;
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }
  .stickerbookpuzzle-footer__about {
    font-size: 0.95em;
  }
  .stickerbookpuzzle-footer__bottom {
    font-size: 0.92em;
    padding: 8px 0 12px 0;
  }
}

/* Hide default list markers if using ::before */
.stickerbookpuzzle-list,
.stickerbookpuzzle-footer__links,
.stickerbookpuzzle-footer__anchors,
.stickerbookpuzzle-nav__list {
  list-style: none;
  padding-left: 0;
  margin-left: 0;
}