:root{
    --ex-bg: #ffffff;
    --ex-ink: #0f172a;
    --ex-muted: rgba(15,23,42,.70);
    --ex-muted2: rgba(15,23,42,.56);
    --ex-border: rgba(15,23,42,.10);
    --ex-shadow: 0 18px 55px rgba(2,6,23,.10);
    --ex-radius: 18px;
    --ex-accent: #2563eb;
    --ex-accent2: #0ea5e9;
    --ex-chip: rgba(37,99,235,.10);
    --ex-chip-border: rgba(37,99,235,.22);
  }

  .expertise{
    background: var(--ex-bg);
    color: var(--ex-ink);
    padding: clamp(56px, 7vw, 96px) 0;
  }

  .expertise__container{
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
  }

  .expertise__header{
    display: block;
    max-width: 920px;
    margin: 0 0 22px;
  }

  .expertise__eyebrow{
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(15,23,42,.04);
    border: 1px solid rgba(15,23,42,.08);
    color: rgba(15,23,42,.78);
    font-size: 13px;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin: 0 0 14px;
  }

  .expertise__title{
    font-size: clamp(28px, 3.6vw, 42px);
    line-height: 1.08;
    margin: 0 0 10px;
    letter-spacing: -0.02em;
  }

  .expertise__lead{
    margin: 0;
    color: var(--ex-muted);
    font-size: clamp(15px, 1.55vw, 18px);
    line-height: 1.6;
  }

  .expertise__controls{
    margin-top: 18px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .expertise__search{
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(15,23,42,.04);
    border: 1px solid rgba(15,23,42,.10);
    border-radius: 14px;
    padding: 12px 12px;
    box-shadow: 0 10px 30px rgba(2,6,23,.04);
  }

  .expertise__search svg{ color: rgba(15,23,42,.60); }

  .expertise__input{
    width: 100%;
    border: 0;
    outline: none;
    background: transparent;
    font-size: 14px;
    color: var(--ex-ink);
  }

  .expertise__chips{
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .expertise__chip{
    border: 1px solid rgba(15,23,42,.12);
    background: rgba(255,255,255,.0);
    color: rgba(15,23,42,.80);
    border-radius: 999px;
    padding: 9px 12px;
    font-size: 13px;
    font-weight: 650;
    cursor: pointer;
    transition: transform .15s ease, background .15s ease, border-color .15s ease;
  }

  .expertise__chip:hover{ transform: translateY(-1px); }

  .expertise__chip.is-active{
    background: var(--ex-chip);
    border-color: var(--ex-chip-border);
    color: rgba(37,99,235,.95);
  }

  .expertise__grid{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 18px;
  }

  @media (max-width: 980px){
    .expertise__grid{ grid-template-columns: 1fr; }
  }

  .service-card{
    border: 1px solid var(--ex-border);
    border-radius: var(--ex-radius);
    background: rgba(255,255,255,.96);
    box-shadow: var(--ex-shadow);
    padding: 18px;
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: 14px;
    min-height: 250px;
    transition: transform .18s ease, box-shadow .18s ease;
  }

  .service-card:hover{
    transform: translateY(-2px);
    box-shadow: 0 22px 60px rgba(2,6,23,.12);
  }

  .service-card__top{
    display: flex;
    gap: 12px;
    align-items: flex-start;
  }

  .service-card__icon{
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(37,99,235,.12), rgba(14,165,233,.10));
    border: 1px solid rgba(37,99,235,.18);
    display: grid;
    place-items: center;
    color: rgba(37,99,235,.95);
    flex: 0 0 auto;
  }

  .service-card__title{
    margin: 0;
    font-size: 16px;
    letter-spacing: -0.01em;
  }

  .service-card__desc{
    margin: 6px 0 0;
    color: var(--ex-muted);
    font-size: 13.5px;
    line-height: 1.5;
  }

  .service-card__body{
    display: grid;
    gap: 10px;
  }

  .service-card__benefit{
    margin: 0;
    color: rgba(15,23,42,.82);
    line-height: 1.55;
    font-size: 13.5px;
  }

  .service-card__list{
    margin: 0;
    padding-left: 18px;
    color: rgba(15,23,42,.78);
    line-height: 1.55;
    font-size: 13.5px;
  }

  .service-card__actions{
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
  }

  .btn{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 11px 14px;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 750;
    font-size: 14px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform .15s ease, filter .15s ease, background .15s ease, border-color .15s ease;
  }

  .btn:hover{ transform: translateY(-1px); filter: brightness(1.02); }

  .btn--primary{
    background: rgba(37,99,235,.95);
    border-color: rgba(37,99,235,.35);
    color: #fff;
    box-shadow: 0 12px 30px rgba(37,99,235,.18);
  }

  .btn--ghost{
    background: rgba(255,255,255,.0);
    border-color: rgba(15,23,42,.14);
    color: rgba(15,23,42,.86);
    box-shadow: none;
  }

  /* Filtering */
  .service-card.is-hidden{ display: none; }

  /* Footer callout */
  .expertise__footer{
    display: block;
    margin-top: 18px;
  }

  .expertise__callout{
    border-radius: calc(var(--ex-radius) + 2px);
    border: 1px solid rgba(37,99,235,.18);
    background: linear-gradient(135deg, rgba(37,99,235,.08), rgba(14,165,233,.06));
    padding: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
  }

  .expertise__calloutTitle{ margin: 0; font-size: 16px; }
  .expertise__calloutText{ margin: 6px 0 0; color: rgba(15,23,42,.76); max-width: 640px; line-height: 1.5; }

  /* Modal */
  .modal{
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 18px;
    z-index: 9999;
  }

  .modal.is-open{ display: flex; }

  .modal__backdrop{
    position: absolute;
    inset: 0;
    background: rgba(2,6,23,.55);
    backdrop-filter: blur(6px);
  }

  .modal__panel{
    position: relative;
    width: min(720px, 100%);
    border-radius: 18px;
    background: rgba(255,255,255,.98);
    border: 1px solid rgba(15,23,42,.12);
    box-shadow: 0 30px 90px rgba(2,6,23,.25);
    overflow: hidden;
  }

  .modal__head{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 14px 14px;
    border-bottom: 1px solid rgba(15,23,42,.10);
  }

  .modal__title{ margin: 0; font-size: 16px; }

  .modal__close{
    width: 42px;
    height: 42px;
    border-radius: 14px;
    border: 1px solid rgba(15,23,42,.12);
    background: rgba(15,23,42,.03);
    cursor: pointer;
  }

  .modal__content{
    padding: 14px 14px;
    color: rgba(15,23,42,.82);
    line-height: 1.6;
  }

  .modal__content ul{ margin: 10px 0 0; padding-left: 18px; }

  .modal__foot{
    padding: 14px 14px;
    border-top: 1px solid rgba(15,23,42,.10);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
  }