/* ─── TOKENS ─────────────────────────────────────────────────────────── */
    :root {
      --bg-color:        #F9F9F9;
      --text-main:       #1A1A1A;
      --text-muted:      #888888;
      --accent-color:    #C5A059;
      --dark-bg:         #111111;
      --font-serif:      'Playfair Display', serif;
      --font-sans:       'Montserrat', sans-serif;
      --container-width: 1400px;
      --nav-height:      80px;
    }

    /* ─── BASE ───────────────────────────────────────────────────────────── */
    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

    body {
      padding-top: var(--nav-height);
      background-color: var(--bg-color);
      color: var(--text-main);
      font-family: var(--font-sans);
      font-weight: 300;
      line-height: 1.8;
      overflow-x: hidden;
    }

    a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
    a:hover { color: var(--accent-color); }

    /* ─── NAV ────────────────────────────────────────────────────────────── */
    nav {
      padding: 0 5%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: fixed;
      width: 100%;
      top: 0;
      height: var(--nav-height);
      background: rgba(255, 255, 255, 0.98);
      z-index: 1000;
      border-bottom: 1px solid #eee;
    }

    .logo-img { height: 40px; width: auto; display: block; }

    .menu-links {
      display: flex;
      gap: 3rem;
      list-style: none;
      align-items: center;
    }

    .menu-links a {
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      font-weight: 500;
      color: var(--text-main);
      transition: color 0.3s;
    }

    .menu-links a:hover,
    .menu-links a.active-link { color: var(--accent-color); }

    .contact-icon { display: flex; align-items: center; justify-content: center; }
    .contact-icon svg { width: 20px; height: 20px; transition: stroke 0.3s; }
    .contact-icon:hover svg { stroke: var(--accent-color); }

    .hamburger { display: none; cursor: pointer; }
    .bar {
      display: block;
      width: 25px; height: 2px;
      margin: 5px auto;
      transition: all 0.3s ease-in-out;
      background-color: var(--text-main);
    }

    /* ─── PAGE HEADER ────────────────────────────────────────────────────── */
    .page-hero {
      text-align: center;
      padding: 5rem 5% 3.5rem;
      border-bottom: 1px solid #e5e5e5;
      position: relative;
      overflow: hidden;
    }

    .page-hero .pre-title {
      display: block;
      font-size: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 4px;
      color: var(--text-muted);
      margin-bottom: 1rem;
    }

    .page-hero h1 {
      font-family: var(--font-serif);
      font-style: italic;
      font-size: clamp(3rem, 7vw, 5.5rem);
      font-weight: 400;
      line-height: 1.1;
      margin-bottom: 1rem;
    }

    .page-hero .subhead {
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 3px;
      color: var(--text-muted);
    }

    /* Signature element — giant category watermark */
    .watermark {
      position: absolute;
      bottom: -2rem;
      left: 50%;
      transform: translateX(-50%);
      font-family: var(--font-serif);
      font-style: italic;
      font-size: clamp(6rem, 18vw, 14rem);
      color: var(--text-main);
      opacity: 0.035;
      white-space: nowrap;
      pointer-events: none;
      user-select: none;
      line-height: 1;
      transition: opacity 0.6s ease;
    }

    /* ─── FILTER BAR ─────────────────────────────────────────────────────── */
    .filter-section {
      position: sticky;
      top: var(--nav-height);
      z-index: 100;
      background: var(--bg-color);
      border-bottom: 1px solid #e5e5e5;
      padding: 0 5%;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .filter-bar {
      display: flex;
      gap: 0;
    }

    .filter-btn {
      background: none;
      border: none;
      border-bottom: 2px solid transparent;
      padding: 1.1rem 1.6rem;
      font-family: var(--font-sans);
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      font-weight: 500;
      color: var(--text-muted);
      cursor: pointer;
      transition: all 0.3s ease;
      margin-bottom: -1px; /* overlap the section border */
    }

    .filter-btn:hover { color: var(--text-main); }

    .filter-btn.active {
      color: var(--text-main);
      border-bottom-color: var(--accent-color);
    }

    .project-count {
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: var(--text-muted);
    }

    /* ─── PROJECTS GRID ──────────────────────────────────────────────────── */
    .projects-main {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 5rem 5%;
    }

    .projects-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 3rem 2.5rem;
    }

    /* ─── PROJECT CARD ───────────────────────────────────────────────────── */
    .project-card {
      display: block;
      cursor: pointer;
      transition: opacity 0.35s ease;
    }

    .project-card.hidden {
      display: none;
    }

    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(16px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    .project-card.visible {
      animation: fadeInUp 0.45s ease both;
    }

    /* Image container */
    .image-wrapper {
      position: relative;
      width: 100%;
      aspect-ratio: 4 / 5;
      background-color: #E5E5E5;
      overflow: hidden;
      margin-bottom: 1rem;
    }

    .image-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.65s ease, filter 0.65s ease;
      filter: grayscale(100%);
      display: block;
    }

    /* Hover overlay */
    .image-overlay {
      position: absolute;
      inset: 0;
      background: rgba(17, 17, 17, 0);
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 1.75rem;
      transition: background 0.5s ease;
    }

    .overlay-content {
      transform: translateY(8px);
      opacity: 0;
      transition: transform 0.4s ease, opacity 0.4s ease;
    }

    .overlay-desc {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.85);
      line-height: 1.6;
      margin-bottom: 0.75rem;
      max-width: 240px;
    }

    .overlay-link {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      font-size: 0.7rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: var(--accent-color);
      font-weight: 500;
    }

    .overlay-link i { font-size: 0.65rem; }

    /* Hover states */
    .project-card:hover .image-wrapper img {
      transform: scale(1.06);
      filter: grayscale(0%);
    }

    .project-card:hover .image-overlay {
      background: rgba(17, 17, 17, 0.45);
    }

    .project-card:hover .overlay-content {
      transform: translateY(0);
      opacity: 1;
    }

    /* Category badge */
    .category-badge {
      position: absolute;
      top: 1rem;
      right: 1rem;
      font-size: 0.65rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      font-weight: 500;
      padding: 0.3rem 0.7rem;
      background: rgba(255,255,255,0.92);
      color: var(--text-main);
      backdrop-filter: blur(4px);
    }

    .category-badge.exterior { background: rgba(255,255,255,0.92); }
    .category-badge.interior { background: rgba(255,255,255,0.92); }
    .category-badge.bim      { background: rgba(17,17,17,0.75); color: #fff; }

    /* Card meta below image */
    .project-meta {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 1rem;
    }

    .project-title {
      font-family: var(--font-serif);
      font-size: 1.15rem;
      font-weight: 400;
    }

    .project-year {
      font-size: 0.75rem;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 1px;
      white-space: nowrap;
    }

    .project-location {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-top: 0.15rem;
      letter-spacing: 0.5px;
    }

    /* ─── CTA STRIP ──────────────────────────────────────────────────────── */
    .cta-strip {
      background: var(--dark-bg);
      color: #fff;
      padding: 5rem 5%;
      text-align: center;
    }

    .cta-strip p.eyebrow {
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 3px;
      color: var(--accent-color);
      margin-bottom: 1.25rem;
    }

    .cta-strip h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.8rem, 4vw, 3rem);
      font-weight: 400;
      margin-bottom: 2.5rem;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.25;
    }

    .btn-whatsapp {
      background-color: #25D366;
      color: #ffffff;
      border: 1px solid rgba(255,255,255,0.3);
      padding: 1rem 2.25rem;
      text-transform: uppercase;
      letter-spacing: 2px;
      font-size: 0.8rem;
      font-family: var(--font-sans);
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      cursor: pointer;
      transition: all 0.3s ease;
      font-weight: 400;
    }

    .btn-whatsapp:hover {
      background-color: #1ebe5d;
      transform: translateY(-2px);
      color: #fff;
    }

    /* ─── FOOTER ─────────────────────────────────────────────────────────── */
    footer {
      background-color: var(--dark-bg);
      color: #fff;
      padding: 5rem 5%;
      font-size: 0.85rem;
      font-family: var(--font-sans);
      border-top: 1px solid rgba(255, 255, 255, 0.07);
    }

    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2.5rem;
      text-align: center;
    }

    .footer-menu {
      display: flex;
      gap: 2.5rem;
      list-style: none;
      padding: 0; margin: 0;
    }

    .footer-menu a {
      color: #aaa;
      text-transform: uppercase;
      letter-spacing: 2px;
      transition: color 0.3s ease;
    }

    .footer-menu a:hover { color: #fff; }

    .social-icons {
      list-style: none;
      display: flex;
      justify-content: center;
      gap: 1.25rem;
      padding: 0; margin: 0;
    }

    .social-icons a {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 42px; height: 42px;
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 50%;
      color: #fff;
      font-size: 1.1rem;
      transition: all 0.3s ease;
    }

    .social-icons a:hover {
      background-color: #fff;
      color: #111;
      transform: translateY(-3px);
      border-color: #fff;
    }

    .footer-bottom {
      color: #555;
      font-size: 0.72rem;
      letter-spacing: 1px;
      text-transform: uppercase;
    }

    /* ─── RESPONSIVE ─────────────────────────────────────────────────────── */
    @media (max-width: 1100px) {
      .projects-grid { grid-template-columns: repeat(2, 1fr); gap: 2.5rem 2rem; }
    }

    @media (max-width: 768px) {
      .projects-grid { grid-template-columns: 1fr; gap: 3rem; }
      .projects-main { padding: 3rem 5%; }

      .filter-section { padding: 0 4%; }
      .filter-btn { padding: 1rem 0.9rem; font-size: 0.7rem; letter-spacing: 1px; }
      .project-count { display: none; }

      .page-hero { padding: 3.5rem 5% 2.5rem; }
      .watermark { font-size: 5rem; opacity: 0.04; }

      .footer-menu { flex-direction: column; gap: 1.25rem; }
      footer { padding: 3.5rem 5%; }

      /* Hamburger */
      .hamburger { display: block; z-index: 1001; }
      .hamburger.active .bar:nth-child(2) { opacity: 0; }
      .hamburger.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
      .hamburger.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

      .menu-links {
        position: fixed;
        left: -100%;
        top: 0;
        flex-direction: column;
        background-color: #fff;
        width: 100%;
        height: 100vh;
        justify-content: center;
        align-items: center;
        text-align: center;
        transition: 0.4s ease;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        gap: 0;
      }
      .menu-links.active { left: 0; }
      .menu-links li { margin: 1.4rem 0; }
      .menu-links a { font-size: 1.15rem; }
    }

    /* Reduced motion */
    @media (prefers-reduced-motion: reduce) {
      .project-card, .image-wrapper img, .overlay-content { transition: none; animation: none; }
    }