/* ============================================
       KATONOMETRICA PORTFOLIO - Clean Grid Style
       ============================================ */

    .container {
      max-width: 1200px;
      margin: 0 auto;
    }

    /* ===== HERO SECTION ===== */
    /* Hero styles are now unified in styles.css */

    /* ===== ARCHITECTURE OVERVIEW ===== */
    .architecture-overview {
      background: var(--bg-alt);
      padding: 7.5rem 4rem;
    }

    .section-header {
      margin-bottom: 80px;
    }

    .overline {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      font-weight: 400;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 16px;
      display: block;
    }

    .section-header h2 {
      color: var(--text-secondary);
      font-size: clamp(1.75rem, 3.5vw, 3rem);
      font-weight: 700;
      line-height: 1.15;
    }

    .architecture-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .architecture-flow {
      display: flex;
      flex-direction: column;
      gap: 0;
      font-family: var(--font-mono);
      font-size: 0.9rem;
    }

    .arch-step {
      background: var(--surface);
      border: 1px solid var(--border-strong);
      padding: 16px 20px;
    }

    .arch-step:not(:last-child)::after {
      content: " ↓";
      margin-left: 12px;
      color: var(--accent);
      font-weight: 600;
    }

    .stats-sidebar {
      background: var(--surface);
      border: 1px solid var(--border);
      padding: 32px;
    }

    .stats-sidebar .overline {
      margin-bottom: 20px;
    }

    .stat-item {
      margin-bottom: 24px;
    }

    .stat-item:last-child {
      margin-bottom: 0;
    }

    .stat-metric {
      font-family: var(--font-display);
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
    }

    .stat-description {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--text-secondary);
      margin-top: 8px;
    }

    /* ===== PORTFOLIO GRID SECTION ===== */
    .portfolio-section {
      padding: 7.5rem 4rem;
      background: var(--bg);
    }

    .portfolio-section .container {
      max-width: 1200px;
      margin: 0 auto;
    }

    /* Grid Layout */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    /* ===== PROJECT CARDS ===== */
    .project-card {
      background: var(--surface);
      border: 1px solid var(--border);
      padding: 40px;
      transition: border-color var(--duration-fast) var(--ease);
    }

    .project-card:hover {
      border-color: var(--border-strong);
    }

    .project-sector {
      font-family: var(--font-mono);
      font-size: 0.65rem;
      font-weight: 400;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 16px;
      display: block;
    }

    .project-card h3 {
      margin-bottom: 8px;
    }

    .project-subtitle {
      font-family: var(--font-body);
      font-style: italic;
      font-size: 1rem;
      color: var(--text-secondary);
      margin-bottom: 20px;
      line-height: 1.5;
    }

    .project-description {
      font-size: 0.95rem;
      line-height: 1.7;
      color: var(--text-secondary);
      margin-bottom: 24px;
    }

    .project-line {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      letter-spacing: 0.04em;
      color: var(--text-secondary);
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .project-line strong {
      color: var(--text-secondary);
      font-weight: 500;
    }

    .project-tech {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }

    .tech-tag {
      font-family: var(--font-mono);
      font-size: 0.7rem;
      letter-spacing: 0.04em;
      padding: 6px 12px;
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--text-secondary);
    }

    .project-metrics {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      padding-top: 20px;
      border-top: 1px solid var(--border);
    }

    .project-metrics .metric-item {
      font-family: var(--font-display);
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.3;
    }

    /* ===== CTA SECTION ===== */
    .cta-section {
      background: var(--bg-alt);
      color: var(--text);
      padding: 7.5rem 4rem;
      text-align: center;
    }

    .cta-section h2 {
      font-size: clamp(1.75rem, 4vw, 2.5rem);
      font-weight: 700;
      margin: 0 0 1rem 0;
      letter-spacing: -0.02em;
    }

    .cta-section p {
      color: var(--text);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto 2rem;
      line-height: 1.7;
    }

    .cta-section .cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 1rem 2.5rem;
      background: var(--accent);
      color: var(--bg);
      text-decoration: none;
      font-family: var(--font-display);
      font-weight: 600;
      font-size: 1rem;
      letter-spacing: 0.02em;
      text-transform: uppercase;
      border-radius: 0;
      transition: all 0.3s ease;
      border: none;
      cursor: pointer;
    }

    .cta-section .cta-btn:hover {
      background: var(--accent-hover);
      border-color: var(--accent);
    }

    /* Footer styles unified in styles.css */

    /* ===== RESPONSIVE ===== */
    @media (max-width: 768px) {
      .portfolio-hero {
        padding: 6rem 0 4rem;
        padding-top: calc(5rem + var(--header-height));
        min-height: calc(60vh - var(--header-height));
      }

      .portfolio-hero .container,
      .portfolio-section {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
      }

      .portfolio-hero h1 {
        font-size: 2.5rem;
      }

      .portfolio-hero .hero-tagline {
        font-size: 1.1rem;
      }

      .portfolio-hero .hero-desc {
        font-size: 0.9rem;
      }

      .portfolio-section {
        padding-top: 4rem;
        padding-bottom: 4rem;
      }

      .cta-section {
        padding: 4rem 1.5rem;
      }

      .architecture-overview {
        padding: 4rem 1.5rem;
      }

      .architecture-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .grid-2 {
        grid-template-columns: 1fr;
      }
    }

    /* Extended Portfolio Accordion */
    .extended-portfolio-accordion {
      margin-top: 2rem;
    }

    .accordion-toggle {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      background: var(--bg-alt);
      border: 1px solid var(--border);
      border-radius: 0;
      padding: 1.25rem 1.5rem;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .accordion-toggle:hover {
      border-color: var(--accent);
    }

    .accordion-toggle h2 {
      font-size: 1.3rem;
      color: var(--text);
    }

    .accordion-icon {
      color: var(--accent);
      font-size: 1rem;
      transition: transform 0.3s ease;
    }

    .accordion-toggle[aria-expanded="true"] .accordion-icon {
      transform: rotate(180deg);
    }

    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.5s ease;
    }

    .accordion-content.expanded {
      max-height: 6000px;
    }

    /* Navbar auto-hide on scroll */
    .navbar.nav-hidden {
      transform: translateY(-100%);
    }