/* ===== CUSTOM PROPERTIES ===== */
  :root {
    --terra-500: #C0603A;
    --terra-600: #a84e2e;
    --sand-100: #faf5eb;
    --sand-50: #fdfbf7;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-3xl: 2.5rem;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 14px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.1), 0 4px 10px rgba(0,0,0,0.06);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.08);
  }

  /* ===== BASE ===== */
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body { margin: 0; }
  img { max-width: 100%; height: auto; display: block; }
  select, input, textarea { font-family: inherit; font-size: inherit; }

  /* ===== NAV ===== */
  .nav-fixed {
    background: rgba(253, 251, 247, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
  }
  .nav-fixed.scrolled {
    background: rgba(253, 251, 247, 0.97);
    box-shadow: var(--shadow-md);
  }
  .nav-link { position: relative; }
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--terra-500);
    border-radius: 2px;
    transition: width 0.25s ease;
  }
  .nav-link:hover::after { width: 100%; }

  /* ===== BUTTONS ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--terra-500);
    color: #fff;
    font-weight: 700;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-xl);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
    box-shadow: var(--shadow-md);
  }
  .btn-primary:hover {
    background: var(--terra-600);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
  }
  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--terra-500);
    font-weight: 700;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-xl);
    text-decoration: none;
    border: 2px solid var(--terra-500);
    cursor: pointer;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  }
  .btn-secondary:hover {
    background: var(--terra-500);
    color: #fff;
    box-shadow: var(--shadow-md);
  }

  /* ===== FORM INPUTS ===== */
  .input-field {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #e8e0d4;
    border-radius: var(--radius-lg);
    background: var(--sand-50);
    color: var(--gray-800);
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    outline: none;
  }
  .input-field::placeholder { color: #b0a090; }
  .input-field:focus {
    border-color: var(--terra-500);
    box-shadow: 0 0 0 4px rgba(192, 96, 58, 0.12);
    background: #fff;
  }

  /* ===== CARD HOVER ===== */
  .card-hover { cursor: default; }

  /* ===== SCROLL REVEAL ===== */
  .reveal-up, .reveal-left, .reveal-right {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  @media (prefers-reduced-motion: no-preference) {
    .reveal-up { opacity: 0; transform: translateY(32px); }
    .reveal-left { opacity: 0; transform: translateX(-32px); }
    .reveal-right { opacity: 0; transform: translateX(32px); }
    .reveal-up.revealed,
    .reveal-left.revealed,
    .reveal-right.revealed {
      opacity: 1;
      transform: none;
    }
  }

  /* ===== MOBILE MENU ===== */
  #mobileMenu { max-height: 0; }
  #mobileMenu.open { max-height: 400px; }
  .mobile-link { display: block; }

  /* ===== RESPONSIVE ===== */
  @media (max-width: 767px) {
    .nav-fixed { padding: 0.75rem 0; }
  }