/* ============================================
   S03_PRODUCT.CSS
   Section 03: Product
   ============================================ */

/* --------------------------------------------
   1. Section Base
   -------------------------------------------- */
.product {
  background-color: var(--color-bg-white);
  position: relative;
  overflow: hidden;
}

.product::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50%;
  height: 60%;
  background: radial-gradient(
    ellipse 80% 60% at 0% 100%,
    var(--color-accent-pale) 0%,
    transparent 70%
  );
  pointer-events: none;
  z-index: 0;
}

.product .container {
  position: relative;
  z-index: 1;
}

/* --------------------------------------------
   2. Header
   -------------------------------------------- */
.product__header {
  max-width: 640px;
  margin-bottom: var(--space-16);
}

.product__heading {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

.product__heading-em {
  font-style: normal;
  color: var(--color-accent);
}

/* --------------------------------------------
   3. Intro
   -------------------------------------------- */
.product__intro {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-16);
  align-items: center;
  margin-bottom: var(--space-20);
}

.product__visual-wrap {
  position: relative;
}

.product__visual-placeholder {
  aspect-ratio: 1;
  background: linear-gradient(
    135deg,
    var(--color-bg-dark) 0%,
    var(--color-primary-light) 100%
  );
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  position: relative;
  overflow: hidden;
}

.product__visual-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(200, 146, 42, 0.2);
  animation: pulseRing 3s ease-in-out infinite;
}

.product__visual-ring--1 {
  width: 60%;
  height: 60%;
  animation-delay: 0s;
}

.product__visual-ring--2 {
  width: 85%;
  height: 85%;
  animation-delay: 0.8s;
}

.product__visual-label {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  color: rgba(255,255,255,0.8);
  letter-spacing: var(--tracking-wide);
  position: relative;
  z-index: 1;
}

.product__visual-badge {
  position: absolute;
  bottom: -12px;
  right: 16px;
  background: var(--color-accent);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  letter-spacing: var(--tracking-wide);
}

.product__intro-copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.product__intro-text {
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--color-text-secondary);
}

.product__intro-text strong {
  color: var(--color-text-primary);
  font-weight: 700;
}

/* --------------------------------------------
   4. Features
   -------------------------------------------- */
.product__features {
  margin-bottom: var(--space-16);
}

.product__features-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-10);
  text-align: center;
}

.product__features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.product__feature {
  background: var(--color-bg-light);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.product__feature:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.product__feature-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product__feature-num {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-primary-pale);
  line-height: 1;
  letter-spacing: -0.02em;
}

.product__feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.product__feature-title {
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
}

.product__feature-title span {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.product__feature-text {
  font-size: var(--text-sm);
  line-height: var(--leading-loose);
  color: var(--color-text-secondary);
  flex: 1;
}

.product__feature-tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-accent-pale);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  letter-spacing: var(--tracking-wide);
  align-self: flex-start;
}

/* --------------------------------------------
   5. For Block
   -------------------------------------------- */
.product__for {
  margin-bottom: var(--space-12);
}

.product__for-inner {
  background: var(--color-primary-pale);
  border-radius: var(--radius-xl);
  padding: var(--space-12);
  border-left: 4px solid var(--color-primary);
}

.product__for-heading {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.product__for-text {
  font-size: var(--text-base);
  line-height: var(--leading-loose);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.product__for-text strong {
  color: var(--color-primary);
  font-weight: 700;
}

.product__for-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.product__for-tag {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(45, 90, 64, 0.1);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid rgba(45, 90, 64, 0.2);
}

/* --------------------------------------------
   6. CTA
   -------------------------------------------- */
.product__cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* --------------------------------------------
   7. Responsive
   -------------------------------------------- */
@media (max-width: 767px) {
  .product__intro {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .product__features-grid {
    grid-template-columns: 1fr;
  }

  .product__for-inner {
    padding: var(--space-8) var(--space-6);
  }

  .product__cta {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .product__intro {
    grid-template-columns: 1fr;
  }

  .product__features-grid {
    grid-template-columns: 1fr;
  }
}