/**
 * Te Puo Website - Homepage Styles
 * 
 * Styles specific to the homepage (index.html) featuring:
 * - Hero section with spherical design elements
 * - Text sections with earth tones
 * - Responsive layout for mobile/tablet/desktop
 * - Smooth scroll behavior
 * 
 * Requirements: 7.1, 7.2, 7.3, 8.2
 */

/* ============================================
   HEADER AND NAVIGATION
   ============================================ */

header {
  background-color: var(--color-bg-primary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: var(--z-index-sticky);
  transition: box-shadow var(--transition-base);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin: 0;
  letter-spacing: 0.05em;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--color-text-medium);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-small);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-secondary);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-accent);
  background-color: var(--color-bg-secondary);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  background: linear-gradient(135deg, var(--color-sand) 0%, var(--color-bg-secondary) 100%);
  padding: var(--spacing-xl) var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

/* Decorative spherical elements in background */
.hero::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--color-earth-light) 0%, transparent 70%);
  border-radius: var(--border-radius-sphere);
  opacity: 0.3;
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--color-clay) 0%, transparent 70%);
  border-radius: var(--border-radius-sphere);
  opacity: 0.2;
  z-index: 0;
}

.hero-content {
  text-align: center;
  z-index: 1;
  max-width: 800px;
}

.hero-title {
  font-size: var(--font-size-3xl);
  color: var(--color-earth-dark);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-medium);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
}

.hero-image {
  z-index: 1;
  max-width: 500px;
  width: 100%;
}

.sphere-image {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-sphere);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-slow);
}

.sphere-image:hover {
  transform: scale(1.05);
}

/* ============================================
   SECTION CONTAINERS
   ============================================ */

.section-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section-title {
  text-align: center;
  color: var(--color-earth-dark);
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

/* Decorative underline with spherical accent */
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--color-accent);
  border-radius: var(--border-radius-soft);
}

/* ============================================
   BRAND STORY SECTION
   ============================================ */

.brand-story {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-primary);
}

.story-content {
  max-width: 800px;
  margin: 0 auto;
}

.story-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-medium);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
  text-align: justify;
}

.story-text:last-child {
  margin-bottom: 0;
}

/* ============================================
   DORODANGO TECHNIQUE SECTION
   ============================================ */

.dorodango-technique {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-secondary);
}

.technique-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

.technique-text {
  flex: 1;
  min-width: 300px;
}

.technique-text p {
  font-size: var(--font-size-base);
  color: var(--color-text-medium);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
  text-align: justify;
}

.technique-text p:last-child {
  margin-bottom: 0;
}

.technique-image {
  flex: 1;
  min-width: 300px;
  max-width: 500px;
}

.process-image {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-soft);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   PHILOSOPHY SECTION
   ============================================ */

.philosophy {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-primary);
}

.philosophy-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.philosophy-card {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-soft);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* Spherical decorative element in card */
.philosophy-card::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
  border-radius: var(--border-radius-sphere);
  opacity: 0.1;
  transition: opacity var(--transition-base);
}

.philosophy-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.philosophy-card:hover::before {
  opacity: 0.2;
}

.card-title {
  color: var(--color-accent);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--color-text-medium);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.commercial-brief {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-md);
  background-color: var(--color-sand);
  border-radius: var(--border-radius-soft);
  border-left: 4px solid var(--color-accent);
}

.brief-text {
  font-size: var(--font-size-base);
  color: var(--color-text-medium);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-sm);
  text-align: justify;
}

.brief-text:last-child {
  margin-bottom: 0;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background-color: var(--color-earth-dark);
  color: var(--color-text-light);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.footer-section {
  margin-bottom: var(--spacing-sm);
}

.footer-title {
  color: var(--color-sand);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.footer-text {
  color: var(--color-earth-light);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.footer-links,
.social-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li,
.social-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-link,
.social-link {
  color: var(--color-earth-light);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover,
.social-link:hover {
  color: var(--color-sand);
  text-decoration: none;
}

.footer-bottom {
  max-width: 1280px;
  margin: var(--spacing-md) auto 0;
  padding: var(--spacing-md) var(--spacing-md) 0;
  border-top: 1px solid var(--color-earth-medium);
  text-align: center;
}

.copyright {
  color: var(--color-earth-light);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* ============================================
   RESPONSIVE DESIGN - TABLET
   ============================================ */

@media (min-width: 768px) {
  /* Header */
  .header-container {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .logo {
    font-size: var(--font-size-3xl);
  }

  .nav-list {
    gap: var(--spacing-lg);
  }

  /* Hero */
  .hero {
    flex-direction: row;
    justify-content: space-between;
    padding: var(--spacing-xxl) var(--spacing-lg);
  }

  .hero-content {
    text-align: left;
    max-width: 50%;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-xl);
  }

  .hero-image {
    max-width: 45%;
  }

  /* Technique Section */
  .technique-content {
    flex-direction: row;
    align-items: flex-start;
  }

  /* Philosophy Cards */
  .philosophy-content {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Footer */
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================
   RESPONSIVE DESIGN - DESKTOP
   ============================================ */

@media (min-width: 1024px) {
  /* Hero */
  .hero {
    padding: var(--spacing-xxl) var(--spacing-xl);
  }

  .hero::before {
    width: 400px;
    height: 400px;
  }

  .hero::after {
    width: 500px;
    height: 500px;
  }

  /* Section Containers */
  .section-container {
    padding: 0 var(--spacing-lg);
  }

  /* Philosophy Cards */
  .philosophy-content {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
  }

  /* Footer */
  .footer-container {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
  }
}

/* ============================================
   RESPONSIVE DESIGN - LARGE DESKTOP
   ============================================ */

@media (min-width: 1280px) {
  /* Hero */
  .hero-title {
    font-size: 4.5rem;
  }

  .hero-subtitle {
    font-size: var(--font-size-2xl);
  }
}

/* ============================================
   SMOOTH SCROLL BEHAVIOR
   ============================================ */

html {
  scroll-behavior: smooth;
}

/* Smooth scroll for anchor links */
a[href^="#"] {
  scroll-behavior: smooth;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  header {
    position: static;
  }

  .hero::before,
  .hero::after,
  .philosophy-card::before {
    display: none;
  }

  footer {
    page-break-before: always;
  }
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

/* High contrast mode support */
@media (prefers-contrast: high) {
  .hero {
    background: var(--color-bg-primary);
  }

  .philosophy-card {
    border: 2px solid var(--color-text-dark);
  }
}

/* Dark mode support (optional future enhancement) */
@media (prefers-color-scheme: dark) {
  /* Dark mode styles can be added here if needed */
}