/* ============================================
   YANCCE Home – Climate Curve–inspired layout
   Bold hero, big stats, clear sections
   ============================================ */

/* ----- Hero (compact, dark, bold type) + auto-changing photos ----- */
.hero {
  position: relative;
  min-height: min(65vh, 480px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem 2.5rem;
  overflow: hidden;
  background: var(--hero-bg);
  color: var(--hero-text);
}

.hero-slides {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-color: var(--hero-bg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

.hero-slide--active {
  opacity: 1;
  z-index: 1;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 100% 80% at 50% 20%, rgba(0, 0, 0, 0.4), transparent 50%),
    radial-gradient(ellipse 80% 60% at 80% 80%, rgba(0, 0, 0, 0.25), transparent 45%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.35) 50%, rgba(0, 0, 0, 0.5) 100%);
  z-index: 2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 820px;
}

.hero-label {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.5rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}

.hero-title-lg {
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0 0 1rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--hero-text-muted);
  margin: 0 auto 0.5rem;
  font-weight: 600;
  line-height: 1.4;
  max-width: 560px;
}

.hero-tagline {
  font-size: clamp(0.9rem, 1.8vw, 1.05rem);
  color: var(--hero-text-muted);
  margin: 0 auto 1.25rem;
  font-weight: 400;
  line-height: 1.5;
  max-width: 560px;
  opacity: 0.95;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
  margin-bottom: 1rem;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
  font-size: 0.95rem;
}

.hero-links a {
  color: var(--hero-text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.hero-links a:hover {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, 0.5);
}

.hero-scroll {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  color: var(--hero-text-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  z-index: 3;
}

.scroll-line {
  width: 1px;
  height: 28px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  border-radius: 1px;
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ----- Intro strip (one strong sentence) ----- */
.intro-strip {
  padding: 1.25rem 0;
  background: var(--color-surface);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.intro-strip p {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--color-text);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* ----- Stats (big number callouts like Climate Curve) ----- */
.stats-section {
  padding: 1.5rem 0;
  background: var(--color-bg-alt);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-number {
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

@media (max-width: 600px) {
  .stats-grid {
    gap: 1.5rem;
  }
  .stat-number {
    font-size: 2rem;
  }
}

/* ----- Section block (shared pattern: overline + title + content) ----- */
.section-block {
  padding: 2rem 0;
}

.section-block--alt {
  background: var(--color-bg-alt);
}

.section-overline {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 0.35rem;
  text-align: center;
}

.section-block .section-title {
  margin-bottom: 0.75rem;
}

.section-block .section-intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 1.25rem;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.55;
}

/* ----- Why YANCCE / About teaser ----- */
.about-teaser {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 0;
}

.about-teaser p {
  margin: 0 0 0.75rem;
  color: var(--color-text);
  line-height: 1.55;
}

.about-teaser .btn {
  margin-top: 0.35rem;
}

/* ----- Our Approach ----- */
.flowchart-section {
  padding: 2rem 0;
  background: var(--color-surface);
}

.flowchart-title {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin: 0 0 0.35rem;
  text-align: center;
}

.flowchart-intro {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto 0;
  font-size: 0.95rem;
}

/* ----- Climate change data notice (data missing) ----- */
.data-notice-section {
  padding: 1.5rem 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.data-notice-box {
  max-width: 640px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  background: var(--color-bg-alt);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  text-align: center;
}

.data-notice-message {
  margin: 0;
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.data-notice-message strong {
  color: var(--color-primary-dark);
}

/* ----- What Sets YANCCE Apart (one row, animated boxes) ----- */
.pillars-section {
  padding: 2rem 0;
  background: var(--color-bg-alt);
}

.pillars-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 0 auto;
  max-width: 1100px;
}

.pillar-box {
  position: relative;
  padding: 1.25rem 1rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(76, 175, 80, 0.12);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.35s ease,
              border-radius 0.35s ease,
              border-color 0.35s ease;
}

.pillar-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.pillar-box:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 12px 32px rgba(76, 175, 80, 0.2);
  border-radius: 14px;
  border-color: rgba(76, 175, 80, 0.35);
}

.pillar-box:hover::before {
  transform: scaleX(1);
}

.pillar-box__title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.3;
}

.pillar-box__text {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

@media (max-width: 900px) {
  .pillars-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .pillars-row {
    grid-template-columns: 1fr;
  }
}

/* ----- Quick links / Explore ----- */
.quick-links-section {
  padding: 2rem 0;
  background: var(--color-surface);
}

.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.quick-link-card {
  padding: 1rem 1.15rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}

.quick-link-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.quick-link-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  color: var(--color-primary-dark);
}

.quick-link-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .quick-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .quick-links-grid {
    grid-template-columns: 1fr;
  }
}

/* ----- Featured Activities ----- */
.activities-preview-section {
  padding: 2rem 0;
  background: var(--color-bg-alt);
}

.activities-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  max-width: 720px;
  margin: 0 auto 1rem;
}

.activity-preview-card {
  padding: 1rem 1.15rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
}

.activity-preview-card:hover {
  box-shadow: var(--shadow-hover);
}

.activity-preview-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--color-primary-dark);
}

.activity-preview-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.45;
}

.activities-preview-cta {
  text-align: center;
  margin: 0;
}

@media (max-width: 768px) {
  .activities-preview-grid {
    grid-template-columns: 1fr;
  }
}

/* ----- Join CTA (full-width, gradient) ----- */
.join-cta-section {
  padding: 2rem 0;
  background: linear-gradient(135deg, var(--color-primary-darker) 0%, var(--color-primary-dark) 40%, var(--color-primary) 100%);
  color: #fff;
  text-align: center;
}

.join-cta-title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
}

.join-cta-text {
  margin: 0 auto 1rem;
  font-size: 0.95rem;
  opacity: 0.95;
  max-width: 480px;
}

.join-cta-section .btn-primary {
  background: #fff;
  color: var(--color-primary-dark);
}

.join-cta-section .btn-primary:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary-dark);
}