/* ==========================================
     Tufts Medical — Custom Styles
     ========================================== */

  /* --- Base & Reset --- */
  *, *::before, *::after {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  body {
    overflow-x: hidden;
  }

  /* --- Scrollbar --- */
  ::-webkit-scrollbar {
    width: 8px;
  }
  ::-webkit-scrollbar-track {
    background: #f5f3ed;
  }
  ::-webkit-scrollbar-thumb {
    background: #1B5E20;
    border-radius: 4px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: #2d5a2d;
  }

  /* --- Selection --- */
  ::selection {
    background: #1B5E20;
    color: #faf9f6;
  }

  /* --- Hero Animations --- */
  .hero-eyebrow {
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeUp 0.8s ease forwards 0.3s;
  }

  .hero-headline {
    opacity: 0;
    transform: translateY(30px);
    animation: heroFadeUp 0.8s ease forwards 0.5s;
  }

  .hero-sub {
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeUp 0.8s ease forwards 0.7s;
  }

  .hero-ctas {
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeUp 0.8s ease forwards 0.9s;
  }

  .hero-stats {
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeUp 0.8s ease forwards 1.1s;
  }

  @keyframes heroFadeUp {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  /* --- Scroll Line Animation --- */
  @keyframes scrollLine {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
  }

  .scroll-line-fill {
    animation: scrollLine 1.5s ease-in-out infinite;
  }

  /* --- Navbar --- */
  #navbar {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
  }

  #navbar.scrolled {
    background: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(27, 94, 32, 0.08);
  }

  #navbar.scrolled .font-serif {
    color: #1B5E20 !important;
  }

  #navbar.scrolled .text-forest-600 {
    color: #2d5a2d !important;
  }

  /* --- Nav Links --- */
  .nav-link {
    position: relative;
  }

  /* --- Mobile Menu --- */
  .mobile-menu-open #mobile-menu {
    opacity: 1;
    pointer-events: all;
  }

  .mobile-nav-link {
    transition: opacity 0.3s ease, transform 0.3s ease;
    opacity: 0;
    transform: translateY(10px);
  }

  .mobile-menu-open .mobile-nav-link {
    opacity: 1;
    transform: translateY(0);
  }

  .mobile-menu-open .mobile-nav-link:nth-child(1) { transition-delay: 0.1s; }
  .mobile-menu-open .mobile-nav-link:nth-child(2) { transition-delay: 0.15s; }
  .mobile-menu-open .mobile-nav-link:nth-child(3) { transition-delay: 0.2s; }
  .mobile-menu-open .mobile-nav-link:nth-child(4) { transition-delay: 0.25s; }

  /* Mobile menu button animation */
  .menu-open .menu-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .menu-open .menu-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .menu-open .menu-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  /* --- CTA Buttons --- */
  .cta-primary {
    position: relative;
    overflow: hidden;
  }

  .cta-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(27, 94, 32, 0.05), transparent);
    transition: left 0.5s ease;
  }

  .cta-primary:hover::before {
    left: 100%;
  }

  /* --- Section Headers --- */
  .section-eyebrow {
    display: inline-flex;
    align-items: center;
  }

  .section-title {
    position: relative;
  }

  .section-desc {
    position: relative;
  }

  /* --- Service Cards --- */
  .service-card {
    position: relative;
  }

  /* --- Input Fields --- */
  .input-field {
    background: transparent;
  }

  .input-field:focus {
    border-color: #1B5E20;
  }

  .input-field option {
    color: #1a1a1a;
    background: #faf9f6;
  }

  /* --- Submit Button --- */
  .btn-submit {
    position: relative;
    overflow: hidden;
  }

  .btn-submit::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .btn-submit:hover::after {
    opacity: 1;
  }

  /* --- Info Items --- */
  .info-item {
    border-left: 3px solid transparent;
    transition: border-color 0.3s ease;
  }

  .info-item:hover {
    border-left-color: #1B5E20;
  }

  /* --- Contact Details --- */
  .contact-detail {
    border-left: 2px solid #d5e5d5;
    padding-left: 0;
    transition: border-color 0.3s ease;
  }

  .contact-detail:hover {
    border-left-color: #1B5E20;
  }

  /* --- Scroll Reveal (progressive enhancement) --- */
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }

    .reveal.revealed {
      opacity: 1;
      transform: translateY(0);
    }

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    .reveal-delay-6 { transition-delay: 0.6s; }
  }

  /* --- Reduced Motion --- */
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
    html {
      scroll-behavior: auto;
    }
  }

  /* --- Responsive --- */
  @media (max-width: 640px) {
    .hero-headline {
      font-size: 3.25rem;
    }

    .section-title {
      font-size: 2.25rem;
    }

    .about-float-card {
      position: relative;
      bottom: auto;
      right: auto;
      margin-top: 1rem;
      max-width: 100%;
    }
  }

  @media (min-width: 641px) and (max-width: 1023px) {
    .hero-headline {
      font-size: 4.5rem;
    }
  }