.course-catalog-v4 {
    --ink: #102f35; --muted: #667c80; --line: #dce8e6;
    --teal: #087f78; --mint: #e9f7f4;
    background: linear-gradient(180deg, #f2f8f7, #fff 40rem);
    color: var(--ink); min-height: 100vh; padding-bottom: 4rem;
}
.catalog-v4-shell { margin: auto; max-width: 1440px; padding: 0 clamp(1rem, 3vw, 2.5rem); }
.catalog-v4-hero {
    background: radial-gradient(circle at 10% 15%, rgba(89,214,194,.22), transparent 24rem),
        linear-gradient(135deg, #073f42, #087f78); color: #fff;
    overflow: hidden; padding: clamp(3rem, 7vw, 6.5rem) 0 5.5rem; position: relative;
}
.catalog-v4-hero::after { background-image: linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px); background-size: 34px 34px; content: ""; inset: 0; position: absolute; }
.catalog-v4-hero-inner { align-items: end; display: grid; gap: 2rem; grid-template-columns: minmax(0,1fr) minmax(340px,.75fr); position: relative; z-index: 1; }
.catalog-v4-eyebrow { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22); border-radius: 999px; display: inline-flex; font-size: .82rem; font-weight: 800; gap: .45rem; padding: .55rem .85rem; }
.catalog-v4-hero h1 { font-size: clamp(2.2rem,4.5vw,4.4rem); font-weight: 900; letter-spacing: -.05em; line-height: 1.08; margin: 1rem 0 .85rem; }
.catalog-v4-hero-copy>p { color: rgba(255,255,255,.78); font-size: 1.08rem; line-height: 1.9; margin: 0; max-width: 690px; }
.catalog-v4-search { backdrop-filter: blur(14px); background: rgba(255,255,255,.11); border: 1px solid rgba(255,255,255,.2); border-radius: 24px; box-shadow: 0 25px 60px rgba(0,28,30,.23); padding: 1rem; }
.catalog-v4-search label { display: block; font-size: .8rem; font-weight: 800; margin: 0 .25rem .55rem; }
.catalog-v4-search-row { align-items: center; background: #fff; border-radius: 16px; display: flex; gap: .65rem; padding: .45rem .5rem .45rem .85rem; }
.catalog-v4-search-row>i { color: var(--teal); font-size: 1.15rem; }
.catalog-v4-search-row input { border: 0; box-shadow: none!important; flex: 1; min-width: 0; padding: .75rem .2rem; }
.catalog-v4-search-row button { border-radius: 12px; font-weight: 800; min-height: 44px; }
.catalog-v4-workspace { align-items: start; display: grid; gap: 1.5rem; grid-template-columns: 285px minmax(0,1fr); margin-top: -2.7rem; position: relative; z-index: 3; }
.catalog-v4-filters { background: #fff; border: 1px solid var(--line); border-radius: 24px; box-shadow: 0 18px 50px rgba(12,65,67,.1); max-height: calc(100vh - 2rem); overflow: auto; padding: 1.2rem; position: sticky; top: 1rem; }
.catalog-v4-filter-head { align-items: center; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; margin-bottom: 1rem; padding-bottom: .9rem; }
.catalog-v4-filter-head h2 { font-size: 1.05rem; font-weight: 900; margin: 0; }
.catalog-v4-filter-close { display: none; }
.catalog-v4-filter-group { margin-bottom: 1rem; }
.catalog-v4-filter-group label { color: #38565b; display: block; font-size: .78rem; font-weight: 800; margin-bottom: .45rem; }
.catalog-v4-filter-group .form-select,.catalog-v4-filter-group .form-control { border-color: var(--line); border-radius: 12px; font-size: .88rem; min-height: 44px; }
.catalog-v4-filter-group .form-select:focus,.catalog-v4-filter-group .form-control:focus { border-color: var(--teal); box-shadow: 0 0 0 .2rem rgba(8,127,120,.1); }
.catalog-v4-radio-grid { display: grid; gap: .45rem; grid-template-columns: repeat(2,1fr); }
.catalog-v4-radio { cursor: pointer; margin: 0; position: relative; }
.catalog-v4-radio input { opacity: 0; position: absolute; }
.catalog-v4-radio span { align-items: center; background: #f7faf9; border: 1px solid var(--line); border-radius: 11px; display: flex; font-size: .75rem; font-weight: 800; justify-content: center; min-height: 40px; padding: .45rem; text-align: center; }
.catalog-v4-radio input:checked+span { background: var(--mint); border-color: var(--teal); color: #075f5b; box-shadow: inset 0 0 0 1px var(--teal); }
.catalog-v4-filter-actions { display: grid; gap: .55rem; margin-top: 1.15rem; }
.catalog-v4-filter-actions .btn { border-radius: 12px; font-weight: 800; min-height: 44px; }
.catalog-v4-results { background: #fff; border: 1px solid var(--line); border-radius: 26px; box-shadow: 0 18px 60px rgba(12,65,67,.08); min-width: 0; padding: clamp(1rem,2.5vw,1.8rem); }
.catalog-v4-results-head { align-items: center; display: flex; gap: 1rem; justify-content: space-between; margin-bottom: 1.2rem; }
.catalog-v4-results-head h2 { font-size: clamp(1.2rem,2vw,1.65rem); font-weight: 900; margin: 0; }
.catalog-v4-results-head p { color: var(--muted); font-size: .86rem; margin: .3rem 0 0; }
.catalog-v4-mobile-filter { border-radius: 12px; display: none; font-weight: 800; }
.catalog-v4-active { align-items: center; display: flex; flex-wrap: wrap; gap: .5rem; margin: -.2rem 0 1.25rem; }
.catalog-v4-active-label { color: var(--muted); font-size: .78rem; font-weight: 800; }
.catalog-v4-chip { background: var(--mint); border: 1px solid #c8e9e3; border-radius: 999px; color: #075f5b; font-size: .75rem; font-weight: 800; padding: .42rem .7rem; text-decoration: none; }
.catalog-v4-grid { display: grid; gap: 1.1rem; grid-template-columns: repeat(2,minmax(0,1fr)); }
.catalog-v4-card { background: #fff; border: 1px solid var(--line); border-radius: 20px; display: flex; flex-direction: column; overflow: hidden; transition: .22s ease; }
.catalog-v4-card:hover { border-color: #b8dcd7; box-shadow: 0 18px 38px rgba(7,95,91,.12); transform: translateY(-4px); }
.catalog-v4-cover { background: linear-gradient(135deg,#dff4ef,#f6fbfa); min-height: 172px; overflow: hidden; position: relative; }
.catalog-v4-cover img { height: 100%; inset: 0; object-fit: cover; position: absolute; transition: .4s ease; width: 100%; }
.catalog-v4-card:hover .catalog-v4-cover img { transform: scale(1.035); }
.catalog-v4-cover-fallback { align-items: center; background: linear-gradient(135deg,#0b766f,#073f42); color: #fff; display: flex; font-size: 3.3rem; inset: 0; justify-content: center; position: absolute; }
.catalog-v4-cover-badges { display: flex; flex-wrap: wrap; gap: .4rem; inset: .8rem .8rem auto .8rem; position: absolute; z-index: 2; }
.catalog-v4-badge { backdrop-filter: blur(8px); background: rgba(255,255,255,.93); border-radius: 999px; font-size: .68rem; font-weight: 900; padding: .38rem .58rem; }
.catalog-v4-badge.medical { background: rgba(225,249,244,.95); color: #08655f; }
.catalog-v4-card-body { display: flex; flex: 1; flex-direction: column; padding: 1.05rem; }
.catalog-v4-meta { color: var(--teal); font-size: .72rem; font-weight: 800; margin-bottom: .5rem; }
.catalog-v4-card h3 { font-size: 1.08rem; font-weight: 900; line-height: 1.55; margin: 0 0 .45rem; }
.catalog-v4-card h3 a { color: var(--ink); text-decoration: none; }
.catalog-v4-description { color: var(--muted); display: -webkit-box; font-size: .82rem; line-height: 1.75; margin: 0 0 .85rem; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.catalog-v4-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: .8rem; }
.catalog-v4-tags span { background: #f3f7f6; border-radius: 7px; color: #536d71; font-size: .66rem; font-weight: 700; padding: .3rem .45rem; }
.catalog-v4-fit { background: #f8fbfa; border: 1px solid #e6efed; border-radius: 11px; color: #426065; display: flex; font-size: .74rem; gap: .45rem; line-height: 1.55; margin-bottom: .8rem; padding: .6rem .7rem; }
.catalog-v4-fit i { color: var(--teal); }
.catalog-v4-progress { margin-bottom: 1rem; }
.catalog-v4-progress-head { color: #526b70; display: flex; font-size: .69rem; font-weight: 800; justify-content: space-between; margin-bottom: .35rem; }
.catalog-v4-progress-track { background: #edf3f2; border-radius: 999px; height: 6px; overflow: hidden; }
.catalog-v4-progress-fill { background: linear-gradient(90deg,var(--teal),#28b49f); height: 100%; }
.catalog-v4-card-footer { align-items: center; border-top: 1px solid #edf2f1; display: flex; gap: .8rem; justify-content: space-between; margin-top: auto; padding-top: .85rem; }
.catalog-v4-facts { color: var(--muted); display: flex; flex-wrap: wrap; font-size: .69rem; gap: .7rem; }
.catalog-v4-price { font-size: .88rem; font-weight: 900; white-space: nowrap; }
.catalog-v4-detail-link { color: var(--teal); display: inline-flex; font-size: .76rem; font-weight: 900; gap: .3rem; margin-top: .8rem; text-decoration: none; }
.catalog-v4-empty { align-items: center; display: flex; flex-direction: column; justify-content: center; min-height: 390px; padding: 2rem; text-align: center; }
.catalog-v4-empty-icon { align-items: center; background: var(--mint); border-radius: 24px; color: var(--teal); display: flex; font-size: 2.2rem; height: 84px; justify-content: center; margin-bottom: 1rem; width: 84px; }
.catalog-v4-empty h3 { font-weight: 900; }.catalog-v4-empty p { color: var(--muted); max-width: 430px; }
@media(max-width:1100px){.catalog-v4-grid{grid-template-columns:1fr}}
@media(max-width:900px){.catalog-v4-hero-inner{grid-template-columns:1fr}.catalog-v4-workspace{display:block;margin-top:-2rem}.catalog-v4-mobile-filter{display:inline-flex}.catalog-v4-filter-close{align-items:center;background:#edf5f3;border:0;border-radius:10px;display:inline-flex;height:38px;justify-content:center;width:38px}.catalog-v4-filters{border-radius:24px 0 0 24px;bottom:0;max-height:none;position:fixed;right:0;top:0;transform:translateX(110%);transition:.25s ease;width:min(92vw,360px);z-index:1055}.catalog-v4-filters.open{transform:none}.course-catalog-v4.filters-open::after{background:rgba(3,33,35,.55);content:"";inset:0;position:fixed;z-index:1050}}
@media(max-width:575px){.catalog-v4-shell{padding-inline:.8rem}.catalog-v4-hero h1{font-size:2.25rem}.catalog-v4-search-row{flex-wrap:wrap}.catalog-v4-search-row button{width:100%}.catalog-v4-card-footer{align-items:flex-start;flex-direction:column}}