/* ============================================
   KDSS Website — Page-Specific Styles
   ============================================ */

/* --- Hero Section (index.html) --- */
.hero {
  position: relative;
  padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-4xl);
  text-align: center;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1200px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(37,99,235,0.1) 0%, rgba(124,58,237,0.05) 40%, transparent 70%);
  pointer-events: none;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.6;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.hero h1 {
  font-size: 56px;
  max-width: 800px;
  margin: 0 auto var(--space-lg);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 20px;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl);
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 17px;
  }
}

/* --- Contact Section --- */
.contact-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.contact-card {
  max-width: 480px;
  margin: 0 auto;
  text-align: center;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl) var(--space-2xl);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(37,99,235,0.1);
  color: var(--accent-blue);
  margin-bottom: var(--space-lg);
}

.contact-card h3 {
  font-size: 20px;
  margin-bottom: var(--space-md);
}

.contact-email {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-md);
}

.contact-email:hover {
  opacity: 0.8;
}

.contact-card p {
  font-size: 15px;
  color: var(--text-secondary);
}

/* --- Architecture Preview --- */
.arch-preview {
  text-align: center;
}

.arch-preview .arch-diagram {
  max-width: 900px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
}

/* --- Features Page --- */
.features-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

.feature-section {
  scroll-margin-top: calc(var(--nav-height) + var(--space-xl));
}

.feature-section .feature-badge {
  margin-bottom: var(--space-md);
}

/* --- Architecture Page --- */
.arch-section {
  scroll-margin-top: calc(var(--nav-height) + var(--space-xl));
}

.arch-full-diagram {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  margin-bottom: var(--space-3xl);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

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

.component-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.component-card h4 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.component-card .port {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-cyan);
  background: rgba(8,145,178,0.08);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

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

/* --- Download Page --- */
.download-hero {
  text-align: center;
  padding-bottom: var(--space-2xl);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  margin-bottom: var(--space-xl);
}

.version-badge .version {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-green);
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.download-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  box-shadow: var(--shadow-sm);
}

.download-card h4 {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.download-card .meta {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

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

/* --- About Page --- */
.about-hero {
  text-align: center;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.about-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
}

.about-card h3 {
  margin-bottom: var(--space-md);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.tech-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-secondary);
}

.roadmap-timeline {
  position: relative;
  padding-left: var(--space-xl);
}

.roadmap-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.roadmap-item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.roadmap-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-xl) - 4px);
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-blue);
  border: 2px solid var(--bg-secondary);
}

.roadmap-item h4 {
  font-size: 16px;
  margin-bottom: var(--space-xs);
}

.roadmap-item p {
  font-size: 14px;
}

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

/* --- Solutions Page --- */
.solution-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-slow);
}

.solution-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.solution-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.solution-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  padding: 10px;
}

.solution-icon.blue {
  background: rgba(37,99,235,0.12);
  color: var(--accent-blue);
}

.solution-icon.green {
  background: rgba(22,163,74,0.12);
  color: var(--accent-green);
}

.solution-icon.purple {
  background: rgba(124,58,237,0.12);
  color: var(--accent-purple);
}

.solution-icon.cyan {
  background: rgba(8,145,178,0.12);
  color: var(--accent-cyan);
}

.solution-header .badge {
  margin-bottom: var(--space-xs);
}

.solution-header h3 {
  margin-top: var(--space-xs);
}

.solution-desc {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.solution-detail h5 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.solution-detail ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.solution-detail ul li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.solution-detail ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
}

.solution-stats {
  display: flex;
  gap: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-color);
}

.solution-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.solution-stat .stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.solution-stat .stat-desc {
  font-size: 13px;
  color: var(--text-muted);
}

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

  .solution-stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .solution-header {
    flex-direction: column;
    gap: var(--space-md);
  }
}

/* --- Docs Search --- */
.docs-search {
  position: relative;
  margin-bottom: var(--space-lg);
}

.docs-search input {
  width: 100%;
  padding: 10px var(--space-md) 10px 40px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.docs-search input:focus {
  border-color: var(--accent-blue);
}

.docs-search input::placeholder {
  color: var(--text-muted);
}

.docs-search svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-secondary);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-hover);
}