:root {
      --bg: #ffffff;
      --text: #101828;
      --muted: #667085;
      --brand: #2b77e7;
      --brand-700: #1d5fc2;
      --accent: #f0f6ff;
      --card: #ffffff;
      --border: #e5e7eb;
      --success: #16a34a;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-padding-top: 80px;
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
      color: var(--text);
      background: var(--bg);
      line-height: 1.55;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    a {
      color: var(--brand);
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible {
      outline: 3px solid rgba(43, 119, 231, 0.35);
      outline-offset: 3px;
    }

    .container {
      max-width: 1120px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Header */
    header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .9);
      backdrop-filter: blur(6px);
      border-bottom: 1px solid var(--border);
    }

    .nav {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }

    .nav nav {
      margin-left: auto;
      display: flex;
      align-items: center;
      gap: 8px;
      justify-content: flex-end;
    }

    .brand {
      display: flex;
      align-items: baseline;
      gap: 6px;
      font-weight: 700;
      letter-spacing: .2px;
    }

    .brand span:first-child {
      color: var(--brand);
    }

    /* Header nav buttons: subtle by default; primary stands out */
    .nav a.btn {
      background: transparent;
      color: var(--text);
      padding: 10px 12px;
      border-radius: 10px;
      font-weight: 600;
      border-color: var(--border);
    }

    .nav a.btn:hover {
      background: var(--accent);
      text-decoration: none;
    }

    .nav a.btn.primary {
      background: var(--brand);
      color: #fff;
      border-color: var(--brand);
    }

    .btn.whatsapp, .nav a.btn.whatsapp {
      background: #25d366;
      color: #ffffff;
      border-color: #25d366;
      text-decoration: none;
    }



    .whatsapp-icon {
      width: 20px;
      height: 20px;
      flex: 0 0 auto;
      display: inline-block;
      fill: currentColor;
    }

    .whatsapp-icon-small {
      width: 18px;
      height: 18px;
    }

    .whatsapp-contact-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #25d366;
      font-weight: 500;
    }

    .contact-actions {
      margin-top: 16px;
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .contact-action {
      flex: 1 1 200px;
      justify-content: center;
      text-align: center;
      cursor: pointer;
    }

    button.contact-action {
      font-family: inherit;
      font-size: inherit;
    }

    .btn.whatsapp:hover, .nav a.btn.whatsapp:hover {
      background: #20bc59;
      border-color: #20bc59;
      box-shadow: 0 4px 12px rgba(37, 211, 102, 0.25);
      color: #ffffff;
    }

    /* Dropdown */
    .dropdown {
      position: relative;
    }
    
    .dropdown-toggle {
      cursor: pointer;
    }
    
    .dropdown-menu {
      position: absolute;
      top: calc(100% + 8px);
      left: 50%;
      transform: translateX(-50%) translateY(10px);
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 8px;
      min-width: 240px;
      box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
      opacity: 0;
      pointer-events: none;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      z-index: 100;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    
    .dropdown.open .dropdown-menu {
      opacity: 1;
      pointer-events: auto;
      transform: translateX(-50%) translateY(0);
    }
    
    .dropdown-item {
      padding: 10px 14px;
      border-radius: 8px;
      color: var(--text);
      font-weight: 500;
      font-size: 15px;
      transition: background-color 0.2s ease, color 0.2s ease;
    }
    
    .dropdown-item:hover {
      background: var(--accent);
      color: var(--brand);
      text-decoration: none;
    }
    
    .dropdown-toggle svg {
      transition: transform 0.2s ease;
    }
    
    .dropdown.open .dropdown-toggle svg {
      transform: rotate(180deg);
    }

    @media (max-width: 700px) {
      .dropdown-menu {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        background: #f8fafc;
        margin-top: 8px;
        display: none;
        padding: 4px;
        width: 100%;
      }
      .dropdown.open .dropdown-menu {
        display: flex;
        transform: none;
      }
    }

    /* Hero */
    .hero {
      padding: 56px 0 24px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr .8fr;
      gap: 24px;
      align-items: center;
    }

    h1 {
      font-size: clamp(28px, 3.5vw, 44px);
      line-height: 1.15;
      margin: 0 0 12px;
    }

    .sub {
      font-size: clamp(16px, 2vw, 18px);
      color: var(--muted);
      margin-bottom: 20px;
    }

    .ctas {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 12px 16px;
      border-radius: 12px;
      border: 1px solid var(--border);
      background: #fff;
      color: var(--text);
      font-weight: 600;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    }

    .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    }

    .btn.primary {
      background: var(--brand);
      color: #fff;
      border-color: var(--brand);
    }

    .btn.primary:hover {
      background: var(--brand-700);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(43, 119, 231, 0.25);
    }

    .badge {
      display: inline-block;
      background: var(--accent);
      color: var(--brand-700);
      padding: 6px 10px;
      border-radius: 999px;
      font-weight: 600;
      font-size: 12px;
    }

    .card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 16px;
    }

    .media {
      position: relative;
      overflow: hidden;
      border-radius: 16px;
      border: 1px solid var(--border);
      background: #f8fafc;
    }

    .media img {
      width: 100%;
      height: auto;
      display: block;
    }

    .map-embed {
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
      background: #f8fafc;
    }

    .map-embed iframe {
      width: 100%;
      aspect-ratio: 4 / 3;
      min-height: 350px;
      border: 0;
      display: block;
    }



    /* Mobile menu toggle */
    .menu-toggle {
      display: none;
      margin-left: auto;
      border: 1px solid var(--border);
      background: #fff;
      color: var(--text);
      border-radius: 10px;
      padding: 8px 10px;
      font-weight: 600;
    }

    .menu-toggle .bars {
      display: inline-flex;
      flex-direction: column;
      gap: 3px;
      margin-left: 6px;
    }

    .menu-toggle .bar {
      width: 16px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
    }

    /* Sections */
    section {
      padding: 40px 0;
    }

    h2 {
      font-size: clamp(22px, 2.5vw, 28px);
      margin: 0 0 16px;
    }

    .grid {
      display: grid;
      gap: 16px;
    }

    .grid.cols-3 {
      grid-template-columns: repeat(3, 1fr);
    }

    .grid.cols-2 {
      grid-template-columns: repeat(2, 1fr);
    }

    /* Info cards */
    .kpis {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }

    .kpi {
      padding: 16px;
      border: 1px solid var(--border);
      border-radius: 12px;
    }

    .kpi .label {
      color: var(--muted);
      font-size: 13px;
    }

    .kpi .value {
      font-weight: 700;
      font-size: 18px;
    }

    /* Footer */
    footer {
      background: #0b1220;
      color: #e5e7eb;
      padding: 32px 0;
      margin-top: 32px;
    }

    footer a {
      color: #93c5fd;
    }

    /* Utilities */
    .muted {
      color: var(--muted);
    }

    .stack-8>*+* {
      margin-top: 8px;
    }

    .stack-12>*+* {
      margin-top: 12px;
    }

    .stack-16>*+* {
      margin-top: 16px;
    }

    .stack-24>*+* {
      margin-top: 24px;
    }

    @media (max-width: 900px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }

      .grid.cols-3 {
        grid-template-columns: 1fr;
      }

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

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

    @media (max-width: 700px) {
      .menu-toggle {
        display: inline-flex;
        align-items: center;
      }

      .nav {
        height: 64px;
        padding: 0;
      }

      .nav nav {
        position: absolute;
        top: 64px;
        right: 20px;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 8px;
        box-shadow: 0 10px 24px rgba(2, 6, 23, .12);
        display: none;
        flex-direction: column;
        gap: 6px;
        min-width: 220px;
      }

      .nav nav.open {
        display: flex;
      }

      .nav a.btn {
        padding: 10px 12px;
        font-size: 14px;
        width: 100%;
        justify-content: center;
      }
    }


    .service-card {
      position: relative;
      overflow: hidden;
      padding-top: 180px;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      isolation: isolate;
      transform: translateZ(0);
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 260px;
      background-size: cover;
      background-position: center;
      z-index: 0;
    }

    .service-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.6) 120px, rgba(255, 255, 255, 1) 190px);
      z-index: 1;
    }

    .service-card>* {
      position: relative;
      z-index: 2;
    }

    .card-checkups::before {
      background-image: url('../images/service_checkups.png?v=2');
    }

    .card-restorative::before {
      background-image: url('../images/service_restorative.png?v=2');
    }

    .card-cosmetic::before {
      background-image: url('../images/service_cosmetic.png?v=2');
    }

    /* Modal Styles */
    .modal-overlay {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(17, 24, 39, 0.6);
      backdrop-filter: blur(4px);
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .modal-overlay[hidden] {
      display: none;
    }

    .modal-overlay.open {
      opacity: 1;
      pointer-events: auto;
    }

    .modal-content {
      background: var(--card);
      border-radius: 20px;
      width: 100%;
      max-width: 550px;
      padding: 32px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
      transform: translateY(20px) scale(0.95);
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
      opacity: 0;
      max-height: 90vh;
      overflow-y: auto;
    }

    .modal-content:focus {
      outline: none;
    }

    select.form-control {
      appearance: none;
      background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
      background-repeat: no-repeat;
      background-position: right 16px center;
      background-size: 16px;
      padding-right: 40px;
    }

    /* Time selection radio buttons */
    .time-btn-group {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 8px;
    }
    
    @media (min-width: 500px) {
      .time-btn-group {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    .time-btn {
      position: relative;
      cursor: pointer;
    }

    .time-btn input {
      position: absolute;
      opacity: 0;
      width: 0;
      height: 0;
    }

    .time-btn span {
      display: block;
      text-align: center;
      padding: 10px 4px;
      background: #f8fafc;
      border: 1px solid var(--border);
      border-radius: 10px;
      font-size: 14px;
      font-weight: 500;
      color: var(--muted);
      transition: all 0.2s ease;
    }

    .time-btn input:checked + span {
      background: var(--accent);
      border-color: var(--brand);
      color: var(--brand-700);
      font-weight: 600;
      box-shadow: 0 0 0 2px rgba(43, 119, 231, 0.1);
    }

    .time-btn:hover span {
      border-color: var(--brand);
    }

    .modal-overlay.open .modal-content {
      transform: translateY(0) scale(1);
      opacity: 1;
    }

    .modal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
    }

    .modal-header h3 {
      margin: 0;
      font-size: 24px;
      color: var(--text);
    }

    .close-btn {
      background: transparent;
      border: none;
      font-size: 28px;
      cursor: pointer;
      color: var(--muted);
      transition: color 0.2s ease;
      line-height: 1;
      padding: 4px;
    }

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

    .form-group {
      margin-bottom: 16px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border);
      border-radius: 12px;
      font-family: inherit;
      font-size: 16px;
      background: #f8fafc;
      transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
      color: var(--text);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--brand);
      background: #fff;
      box-shadow: 0 0 0 4px var(--accent);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .submit-btn {
      width: 100%;
      padding: 14px;
      margin-top: 8px;
      font-size: 16px;
      justify-content: center;
      cursor: pointer;
    }