/* ==========================================================================
   Project Detail Stylesheet - Raspberry Pi Homelab
   Monochrome (black/white) & highly rounded ("circly") design philosophy.
   ========================================================================== */

/* ==========================================================================
   1. VARIABLES & SYSTEM DEFAULTS
   ========================================================================== */
:root {
  /* Color Palette - Monochrome white, light grey, dark grey, black */
  --bg-primary: #ffffff;
  --bg-secondary: #f6f6f6;
  --bg-card: #f9f9f9;
  
  --accent-primary: #000000;
  --accent-primary-hover: #333333;
  --accent-light: #f1f1f1;

  /* Borders & Dividers */
  --border-light: #e5e5e5;
  --border-active: #111111;
  
  /* Typography Colors */
  --text-primary: #111111;
  --text-secondary: #444444;
  --text-muted: #777777;
  
  /* Fonts */
  --font-display: 'Bitcount Single', 'Courier New', monospace, sans-serif;
  --font-body: 'Montserrat', Arial, sans-serif;
  
  /* Layout */
  --container-width: 1000px;
}

/* ==========================================================================
   2. RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: #bbb;
  border-radius: 50px; /* Circly */
  border: 2px solid var(--bg-secondary);
}
::-webkit-scrollbar-thumb:hover {
  background: #999;
}

/* ==========================================================================
   3. NAVIGATION BAR
   ========================================================================== */
.project-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  height: 70px;
  display: flex;
  align-items: center;
}

.nav-container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 400;
  transition: color 0.2s ease, transform 0.2s ease;
  padding: 6px 16px;
  border-radius: 50px; /* Circly */
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
}

.back-link svg {
  transition: transform 0.2s ease;
}

.back-link:hover {
  color: #fff;
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.back-link:hover svg {
  transform: translateX(-4px);
}

.nav-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ==========================================================================
   4. CONTENT LAYOUT & HERO
   ========================================================================== */
.project-content-wrapper {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 50px 24px 80px 24px;
}

.project-hero {
  position: relative;
  text-align: center;
  padding: 40px 0 50px 0;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border-light);
}

.project-title {
  font-family: var(--font-display);
  font-size: 4.2rem;
  font-weight: 500;
  margin: 0 0 16px 0;
  letter-spacing: -0.01em;
  color: var(--accent-primary);
}

.project-subtitle {
  font-size: 1.2rem;
  font-weight: 300;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 30px auto;
  line-height: 1.5;
}

/* ==========================================================================
   5. CARDS (CIRCLY MINIMALIST PANELS)
   ========================================================================== */
.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 24px; /* Highly Rounded "Circly" */
  padding: 35px;
  margin-bottom: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.015);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.section-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.04);
}

.section-card h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 18px 0;
  color: var(--accent-primary);
  position: relative;
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.section-card h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--accent-primary);
}

.section-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0;
}

/* ==========================================================================
   6. LISTS & TYPOGRAPHY UTILITIES
   ========================================================================== */
.styled-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0 0;
}

.styled-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-size: 0.98rem;
}

.styled-list li::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 9px;
  width: 6px;
  height: 6px;
  background-color: var(--accent-primary);
  border-radius: 50%; /* Circly bullet */
}

.styled-list li strong {
  color: var(--accent-primary);
  font-weight: 500;
}

.styled-list.compact li {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.section-card a, .system-body a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--accent-primary);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.section-card a:hover, .system-body a:hover {
  color: #555555;
  border-bottom-color: #555555;
}

/* ==========================================================================
   7. INFRASTRUCTURE & HARDWARE GRID
   ========================================================================== */
.infrastructure-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 35px;
  margin-top: 24px;
}

.infra-block h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  margin: 0 0 16px 0;
  color: var(--accent-primary);
}

.service-badges {
  display: flex;
  flex-direction: column;
  gap: 12px;
  justify-content: center;
  height: 100%;
}

.service-badge {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 50px; /* Highly Rounded "Circly" */
  padding: 12px 22px;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.005);
}

.service-badge:hover {
  border-color: var(--accent-primary);
  background: var(--accent-primary);
  color: #ffffff;
  transform: translateX(4px);
}

/* ==========================================================================
   8. SYSTEMS SHOWCASE SECTION
   ========================================================================== */
.systems-showcase {
  margin-bottom: 50px;
}

.section-heading {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 500;
  text-align: center;
  margin: 0 0 35px 0;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--accent-primary);
}

.system-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 24px; /* Highly Rounded "Circly" */
  margin-bottom: 35px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.015);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.system-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.04);
}

.system-header {
  padding: 20px 28px;
  background: #f1f1f1;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.system-icon-title {
  display: flex;
  align-items: center;
  gap: 14px;
}

.system-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%; /* Circular Icons */
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  background: #ffffff;
  border: 1px solid var(--border-light);
}

.system-icon-title h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  margin: 0;
  color: var(--accent-primary);
}

.system-tag {
  font-size: 0.78rem;
  font-weight: 400;
  padding: 4px 14px;
  border-radius: 50px; /* Highly Rounded "Circly" */
  background: var(--accent-primary);
  color: #ffffff;
}

/* System Body Two-Column Grid Setup */
.system-body {
  padding: 30px;
  background: #ffffff;
}

.system-layout-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 30px;
  align-items: start;
}

.system-body h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--accent-primary);
  margin: 0 0 10px 0;
}

.system-info-block {
  margin-bottom: 20px;
}

.system-info-block p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin: 0;
}

.system-tech {
  margin-bottom: 20px;
}

.system-features {
  margin-bottom: 24px;
}

.feature-tags {
  list-style: none;
  padding: 0;
  margin: 10px 0 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.feature-tags li {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 5px 14px;
  font-size: 0.85rem;
  border-radius: 50px; /* Highly Rounded "Circly" */
  font-weight: 400;
}

/* Challenges Solved component styling */
.challenge-solved-box {
  padding: 16px 20px;
  border-radius: 16px; /* Rounded "Circly" corners */
  margin-top: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-left: 5px solid var(--accent-primary); /* Monochrome dark left bar */
}

.challenge-solved-box h5 {
  font-size: 0.95rem;
  font-weight: 500;
  margin: 0 0 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-primary);
}

.challenge-solved-box p {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
}

/* System Image Showcase Column styling */
.system-image-col {
  width: 100%;
}

.system-showcase-img {
  width: 100%;
  height: auto;
  border-radius: 20px; /* Circly Rounded */
  border: 1px solid var(--border-light);
  object-fit: cover;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
  transition: transform 0.3s ease;
}

.system-card:hover .system-showcase-img {
  transform: scale(1.02);
}

code {
  font-family: Consolas, Monaco, monospace;
  background: #f3f3f3;
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.9em;
  color: #333;
  border: 1px solid #e0e0e0;
}

/* ==========================================================================
   9. SKILLS SUMMARY
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 35px;
  margin-top: 24px;
}

.skills-category h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent-primary);
  margin: 0 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

/* ==========================================================================
   10. TECH STACK FOOTER
   ========================================================================== */
.detail-footer {
  text-align: center;
  padding: 35px 0 0 0;
  border-top: 1px solid var(--border-light);
}

.detail-footer h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 20px 0;
  color: var(--accent-primary);
  text-transform: uppercase;
}

.tech-tags-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 800px;
  margin: 0 auto;
}

.tech-tag {
  background: var(--accent-primary);
  color: #ffffff;
  padding: 5px 16px;
  border-radius: 50px; /* Highly Rounded "Circly" */
  font-size: 0.8rem;
  font-weight: 300;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.tech-tag:hover {
  background-color: var(--accent-primary-hover);
  transform: translateY(-2px);
}

/* ==========================================================================
   11. RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 900px) {
  .project-title {
    font-size: 3.2rem;
  }
  
  .infrastructure-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .skills-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  
  .system-layout-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .system-image-col {
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .project-content-wrapper {
    padding: 30px 16px 60px 16px;
  }

  .project-hero {
    padding: 20px 0 30px 0;
  }

  .project-title {
    font-size: 2.6rem;
  }

  .project-subtitle {
    font-size: 1.05rem;
    margin-bottom: 20px;
  }

  .section-card {
    padding: 24px;
    margin-bottom: 24px;
  }

  .system-header {
    padding: 16px 20px;
  }

  .system-body {
    padding: 20px;
  }

  .system-icon-title h3 {
    font-size: 1.1rem;
  }

  .section-card h2 {
    font-size: 1.3rem;
  }

  .section-heading {
    font-size: 1.5rem;
    margin-bottom: 25px;
  }
}

@media (max-width: 480px) {
  .project-title {
    font-size: 2.1rem;
  }

  .hero-links {
    flex-direction: column;
    align-items: stretch;
    padding: 0 20px;
  }

  .hero-btn {
    justify-content: center;
  }

  .system-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .system-tag {
    align-self: flex-start;
  }
}