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

    :root {
      --white: #ffffff;
      --navy: #2a2a2a;
      --green: #4caf50;
      --transition: 0.3s ease;
    }

    body {
      font-family: 'Work Sans', sans-serif !important;
      overflow-x: hidden;
    }

    /* ── NAV ──────────────────────────────────────────────────── */
    .main-nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 22px 48px;
      background: transparent;
      transition: background 0.4s ease, padding 0.4s ease, box-shadow 0.4s ease;
    }
    .main-nav.scrolled {
      background: rgba(44, 44, 44, 0.97);
      padding: 14px 48px;
      box-shadow: 0 2px 20px rgba(0,0,0,0.3);
      backdrop-filter: blur(8px);
    }
    .nav__brand { text-decoration: none; color: #fff; }
    .nav__links {
      display: flex; list-style: none; gap: 36px; margin: 0; padding: 0;
    }
    .nav__links a {
      font-size: 12px; font-weight: 400; letter-spacing: 0.14em;
      text-transform: uppercase; color: rgba(255,255,255,0.8);
      text-decoration: none; position: relative; transition: color 0.3s ease;
    }
    .nav__links a::after {
      content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
      height: 1px; background: var(--green);
      transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease;
    }
    .nav__links a:hover { color: #fff; }
    .nav__links a:hover::after,
    .nav__links a.active::after { transform: scaleX(1); }
    .nav__links a.active { color: #fff; }

    #menuOpen {
      background: none; border: none; color: #fff;
      font-size: 26px; cursor: pointer; display: none; padding: 4px;
    }

    /* ── MOBILE MENU ──────────────────────────────────────────── */
    .mobile-menu {
      display: none;
      position: fixed; top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(44,44,44,0.98); z-index: 190;
      flex-direction: column; align-items: center; justify-content: center; gap: 32px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a {
      font-size: 22px; font-weight: 200; letter-spacing: 0.1em;
      text-transform: uppercase; color: rgba(255,255,255,0.85);
      text-decoration: none; transition: color 0.3s ease;
    }
    .mobile-menu a:hover, .mobile-menu a.active { color: #fff; }
    .mobile-menu__close {
      position: absolute; top: 20px; right: 24px;
      background: none; border: none; color: #fff; font-size: 32px; cursor: pointer;
    }

    /* ── HERO ─────────────────────────────────────────────────── */
   .hero {
      position: relative;
      width: 100%;
      height: 60vh;
      min-height: 480px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      padding-top: 80px;
    }
    .hero__bg {
      position: absolute;
      inset: 0;
      z-index: 0;
      background-size: cover;
      background-position: center;
      transition: opacity 0.7s ease;
      opacity: 0;
    }
    .hero__bg.active { opacity: 1; }
    .hero__bg--default {
      background-image: url('../images/air.jpeg');
      opacity: 1;
    }
    .hero__overlay {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(to top, rgba(0,0,0,0.80) 0%, rgba(0,0,0,0.1) 55%),
        linear-gradient(to right, rgba(0,0,0,0.25) 0%, rgba(0,0,0,0.0) 60%);
      z-index: 1;
    }

    /* ── HERO BODY ────────────────────────────────────────────── */
    .hero__body {
      position: relative;
      z-index: 5;
      display: flex;
      flex-direction: column;
      flex: 1;
      padding: 0 48px 0;
      justify-content: center;
      gap: 40px;
      /* ensure body never overflows outside hero on mobile */
      min-height: 0;
    }

    .hero__text {
      opacity: 0;
      animation: fadeUp 0.8s 0.2s ease forwards;
    }

    .hero__breadcrumb {
      font-size: 14px;
      font-weight: 400;
      letter-spacing: 0.12em;
      color: rgba(255,255,255,0.6);
      text-transform: uppercase;
      margin-bottom: 20px;
      opacity: 0;
      animation: fadeUp 0.7s 0.15s ease forwards;
    }
    .hero__breadcrumb a { color: rgba(255,255,255,0.6); text-decoration: none; }
    .hero__breadcrumb a:hover { color: #fff; }
    .hero__breadcrumb span { color: var(--green); }

    .hero__heading {
      font-size: clamp(40px, 7vw, 80px);
      font-weight: 200;
      color: var(--white);
      line-height: 1.0;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
    }

    .hero__sub {
      font-size: clamp(16px, 2vw, 18px);
      font-weight: 300;
      color: rgba(255,255,255,0.82);
      max-width: 560px;
      line-height: 1.6;
    }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(22px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    /* ── PANELS ROW ───────────────────────────────────────────── */
    .hero__panels {
      display: flex;
      gap: 0;
      opacity: 0;
      animation: fadeUp 0.8s 0.45s ease forwards;
      margin: 0 -48px;
      align-self: flex-end;
      width: calc(100% + 96px);
      /* Prevent panels from being clipped outside hero bounds */
      position: relative;
      z-index: 5;
    }

    .panel {
      flex: 1;
      padding: 32px 32px 36px;
      border-top: 1px solid rgba(255,255,255,0.18);
      border-right: 1px solid rgba(255,255,255,0.18);
      cursor: pointer;
      transition: background 0.4s ease, flex 0.5s cubic-bezier(0.4,0,0.2,1);
      background: rgba(0,0,0,0.25);
      backdrop-filter: blur(2px);
      position: relative;
      overflow: hidden;
    }
    .panel:last-child { border-right: none; }

    .panel.active,
    .panel:hover {
      background: rgba(42, 42, 42, 0.72);
      flex: 1.4;
    }

    .hero__panels.has-hover .panel:not(.active) {
      background: rgba(42, 42, 42, 0.62);
      backdrop-filter: none;
    }

    .panel::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
      background: var(--green);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.4s ease;
    }
    .panel.active::before,
    .panel:hover::before { transform: scaleX(1); }

    .panel__number {
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.2em;
      color: rgba(255,255,255,0.45);
      margin-bottom: 14px;
    }

    .panel__title {
      font-size: clamp(16px, 2vw, 22px);
      font-weight: 300;
      color: #fff;
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }

    .panel__desc {
      font-size: 15px;
      font-weight: 300;
      color: rgba(255,255,255,0.72);
      line-height: 1.6;
      margin-bottom: 20px;
      max-width: 240px;
    }

    .panel__link {
      font-size: 10px;
      font-weight: 600;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: #fff;
      text-decoration: none;
      border-bottom: 1px solid rgba(255,255,255,0.5);
      padding-bottom: 2px;
      display: inline-block;
      transition: border-color 0.3s ease;
    }
    .panel__link:hover { border-color: #fff; color: #fff; }


    /* ── WHO WE WORK WITH ─────────────────────────────────────── */
    .who-section {
      background: #2a2a2a;
      padding: 72px 0 0;
    }
    .who-section__intro {
      padding: 0 64px 32px;
    }
    .who-section__label {
      font-size: 10px; font-weight: 600; letter-spacing: 0.22em;
      text-transform: uppercase; color: var(--green); margin-bottom: 12px;
    }
    .who-section__title {
      font-size: clamp(28px, 4vw, 48px);
      font-weight: 200; color: #fff;
      letter-spacing: -0.02em; line-height: 1.1;
    }
    /* panels now live outside hero so override positioning */
    .who-section .hero__panels {
      position: relative;
      z-index: auto;
      opacity: 1;
      animation: none;
      margin: 0;
      width: 100%;
      align-self: auto;
    }

    /* ── SERVICES GRID SECTION ────────────────────────────────── */
    .services-section {
      background-color: #2a2a2a;
      padding: 80px 64px;
      display: flex;
      gap: 60px;
      align-items: flex-start;
    }

    .services-section__intro {
      flex: 0 0 260px;
      padding-top: 8px;
      position: sticky;
      top: 100px;
    }

    .services-section__title {
      font-size: clamp(48px, 6vw, 76px);
      font-weight: 200;
      color: #fff;
      letter-spacing: -0.02em;
      line-height: 1.0;
      margin-bottom: 24px;
    }

    .services-section__desc {
      font-size: 18px;
      font-weight: 300;
      color: rgba(255,255,255,0.7);
      line-height: 1.75;
    }

    .services-grid {
      flex: 1;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
    }

    .service-card {
      position: relative;
      aspect-ratio: 1 / 1.05;
      overflow: hidden;
      cursor: pointer;
      border: 1px solid rgba(255,255,255,0.12);
    }

    .services-grid {
      width: 100%;
    }

    .service-card__bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      transition: transform 0.6s ease;
    }
    .service-card:hover .service-card__bg { transform: scale(1.07); }

    .service-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(42, 42, 42, 0.52);
      transition: background 0.4s ease;
      z-index: 1;
    }
    .service-card:hover::before { background: rgba(42, 42, 42, 0.75); }

    .service-card__content {
      position: absolute;
      inset: 0;
      z-index: 2;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      padding: 22px 20px;
    }

    .service-card__name {
      font-size: clamp(16px, 2vw, 23px);
      font-weight: 300;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 0;
      transition: margin-bottom 0.35s ease;
    }
    .service-card:hover .service-card__name { margin-bottom: 10px; }

    .service-card__desc {
      font-size: 15px;
      font-weight: 300;
      color: rgba(255,255,255,0.82);
      line-height: 1.55;
      max-height: 0;
      overflow: hidden;
      opacity: 0;
      transition: max-height 0.4s ease, opacity 0.35s ease 0.05s;
    }
    .service-card:hover .service-card__desc {
      max-height: 100px;
      opacity: 1;
    }

    /* ── FOOTER ───────────────────────────────────────────────── */
    .site-footer {
      background-color: #2a2a2a;
      color: rgba(255,255,255,0.75);
      font-family: 'Work Sans', sans-serif;
    }
    .footer-inner {
      display: grid;
      grid-template-columns: 1.2fr 1fr 0.8fr 1.4fr;
      gap: 48px;
      padding: 72px 64px 56px;
    }
    .footer-heading { font-size: 15px; font-weight: 500; color: #fff; letter-spacing: 0.04em; margin-bottom: 24px; }
    .footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 14px; font-weight: 300; transition: color 0.25s ease; }
    .footer-links a:hover { color: #fff; }
    .footer-social-list a { display: flex; align-items: center; gap: 10px; }
    .footer-social-list i { font-size: 15px; }
    .footer-logo-placeholder { margin-bottom: 32px; }
    .footer-logo-placeholder img { max-width: 140px; height: auto; }
    .footer-office { margin-bottom: 24px; }
    .office-name { font-size: 13px; font-weight: 600; color: #fff; margin-bottom: 6px; }
    .footer-office p { font-size: 13px; font-weight: 300; line-height: 1.7; color: rgba(255,255,255,0.65); margin: 0 0 3px; }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 18px 64px; font-size: 12px; font-weight: 300; color: rgba(255,255,255,0.35); }

    /* ── RESPONSIVE ───────────────────────────────────────────── */

    /* ≤1280px — tighten grid to 3 columns */
    @media (max-width: 1280px) {
      .services-grid { grid-template-columns: repeat(3, 1fr); }
      .services-section { padding: 64px 48px; gap: 40px; }
    }

    /* ≤1024px — nav compress, 2-col footer */
    @media (max-width: 1024px) {
      .main-nav { padding: 18px 32px; }
      .main-nav.scrolled { padding: 12px 32px; }
      .nav__links { gap: 22px; }

      .hero__body { padding: 0 32px; gap: 32px; }
      .hero__panels { margin: 0 -32px; width: calc(100% + 64px); }
      .panel { padding: 24px 22px 28px; }

      .services-section { padding: 56px 32px; gap: 32px; }
      .services-section__intro { flex: 0 0 200px; position: static; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }

      .footer-inner { grid-template-columns: 1fr 1fr; gap: 36px; padding: 48px 40px 40px; }
      .footer-bottom { padding: 18px 40px; }
    }

    /* ≤900px — hamburger */
    @media (max-width: 900px) {
      #menuOpen { display: block !important; }
      .nav__links { display: none; }
      .main-nav { padding: 16px 24px; }
      .main-nav.scrolled { padding: 12px 24px; }
    }

    /* ≤768px — panels stack, single-col intro */
    @media (max-width: 768px) {
      .hero { min-height: 320px; height: 44vh; }
      .hero__body { padding: 80px 24px 0; }
      .who-section { padding: 48px 0 0; }
      .who-section__intro { padding: 0 24px 24px; }
      .who-section .hero__panels {
        flex-direction: column;
        width: 100%;
      }
      .panel {
        border-right: none;
        border-bottom: 1px solid rgba(255,255,255,0.18);
        padding: 20px 24px;
        flex: none !important;
      }
      .panel:last-child { border-bottom: none; }
      .panel.active, .panel:hover { flex: none !important; }
      .panel__desc { max-width: 100%; font-size: 15px; }

      .services-section {
        flex-direction: column;
        padding: 48px 24px;
        gap: 28px;
      }
      .services-section__intro { flex: none; width: 100%; }
      .services-section .services-grid { flex: none; width: 100%; }

      /* 2-column grid — fixed height so cards are never tiny */
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        width: 100%;
      }
      .service-card {
        aspect-ratio: unset !important;
        height: 180px;
        width: 100%;
      }
      /* Always show name + desc on touch devices */
      .service-card__name {
        font-size: 15px;
        margin-bottom: 6px !important;
      }
      .service-card__desc {
        font-size: 12px;
        max-height: 80px !important;
        opacity: 1 !important;
        display: block;
        line-height: 1.5;
      }
      /* Darken overlay so text is readable without hover */
      .service-card::before {
        background: rgba(20, 20, 20, 0.60) !important;
      }

      .footer-inner { grid-template-columns: 1fr 1fr; gap: 28px; padding: 40px 24px 32px; }
      .footer-bottom { padding: 16px 24px; }
    }

    /* ≤576px */
    @media (max-width: 576px) {
      .who-section__intro { padding: 0 20px 20px; }
      .panel { padding: 18px 20px; }

      .services-section { padding: 40px 20px; }
      .services-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; width: 100%; }
      .service-card { aspect-ratio: unset !important; height: 160px; width: 100%; }
      .service-card__name { font-size: 13px; }
      .service-card__desc { font-size: 11px; }
      .service-card__content { padding: 14px 12px; }

      .footer-inner { grid-template-columns: 1fr; gap: 28px; padding: 36px 20px 28px; }
      .footer-bottom { padding: 14px 20px; }
      .footer-heading { margin-bottom: 16px; }
    }

    /* ≤400px — single column for very small phones */
    @media (max-width: 400px) {
      .services-grid { grid-template-columns: 1fr; gap: 6px; width: 100%; }
      .service-card { aspect-ratio: unset !important; height: 140px; width: 100%; }
      .service-card__name { font-size: 16px; }
      .service-card__desc { font-size: 13px; max-height: 60px !important; }
    }