.collections-page { min-height: 100vh; }
.collections-main { min-height: calc(100vh - 76px); padding: 48px clamp(24px, 4.8vw, 78px) 100px; }
.collections-toolbar { display: flex; align-items: center; gap: 28px; }
.collection-tabs { display: flex; min-width: 0; align-items: center; gap: 8px; overflow-x: auto; padding-bottom: 8px; scrollbar-width: none; }
.collection-tabs::-webkit-scrollbar { display: none; }
.collection-tabs button { flex: none; padding: 7px 11px; border: 1px solid #dcdcd7; border-radius: 8px; background: #fff; color: #777773; font-size: 14px; font-weight: 450; cursor: pointer; transition: border-color 180ms ease,background-color 180ms ease,color 180ms ease; }
.collection-tabs button:is(.is-active,:hover) { border-color: #111; background: #111; color: #fff; }
.collection-tabs button.is-active { font-weight: 500; }
.collection-tabs button:focus-visible { outline: 2px solid #2e7df2; outline-offset: 2px; }
.add-collection-button { display: inline-flex; height: 38px; flex: none; align-items: center; gap: 3px; margin: 0 0 8px auto; padding: 0 5px 0 12px; border: 0; border-radius: 6px; background: transparent; color: #2e7df2; font-size: 14px; cursor: pointer; }
.add-collection-button:hover { background: #f2f6fd; }
.add-collection-button span { font-size: 20px; }
.collections-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 56px clamp(16px,2.1vw,34px); padding-top: 46px; }
.collection-card { min-width: 0; }
.collection-mosaic { display: grid; width: 100%; aspect-ratio: 1; gap: 3px; overflow: hidden; border-radius: 7px; background: #f1f1ee; transition: transform 420ms cubic-bezier(.16,1,.3,1); }
.collection-card:hover .collection-mosaic,.collection-card:focus-visible .collection-mosaic { transform: scale(1.008); }
.collection-mosaic[data-count="1"] { grid-template-columns: 1fr; }
.collection-mosaic[data-count="2"] { grid-template-columns: repeat(2,1fr); }
.collection-mosaic[data-count="3"],.collection-mosaic[data-count="4"] { grid-template: repeat(2,1fr)/repeat(2,1fr); }
.collection-mosaic[data-count="3"] img:nth-child(3) { grid-column: 1/-1; }
.collection-mosaic img { width: 100%; height: 100%; min-width: 0; min-height: 0; object-fit: cover; transition: transform 500ms cubic-bezier(.16,1,.3,1); }
.collection-card:hover .collection-mosaic img { transform: scale(1.018); }
.collection-card h2 { display: flex; align-items: center; gap: 4px; margin: 10px 0 0; font-size: 16px; line-height: 1.2; font-weight: 550; letter-spacing: -.35px; }
.collection-card h2 span { font-size: 16px; }
.collection-card p { margin: 5px 0 0; color: #999994; font-size: 14px; }

.collection-detail-main { min-height: calc(100vh - 76px); padding: 0 clamp(24px,3.4vw,58px) 110px; }
.collection-detail-bar { display: flex; height: 64px; align-items: center; justify-content: space-between; border-bottom: 1px solid #e6e6e2; }
.collection-breadcrumb,.detail-actions { display: flex; align-items: center; gap: 8px; }
.collection-breadcrumb { color: #999994; font-size: 14px; }
.collection-breadcrumb > a { display: grid; width: 32px; height: 32px; place-items: center; border: 1px solid #deded9; border-radius: 7px; color: #111; }
.collection-breadcrumb > a:hover { background: #f6f6f3; }
.collection-breadcrumb .separator { font-size: 18px; }
.collection-breadcrumb strong { color: #111; font-weight: 550; }
.detail-actions button { display: inline-flex; height: 38px; align-items: center; gap: 5px; padding: 0 11px; border: 1px solid #dcdcd7; border-radius: 6px; background: #fff; color: #111; font-size: 14px; cursor: pointer; }
.detail-actions button:hover { background: #f6f6f3; }
.detail-actions span { font-size: 18px; }
.collection-hero { display: grid; justify-items: center; padding: 38px 12px 58px; text-align: center; }
.collection-hero h1 { margin: 0; font-size: clamp(32px,3.1vw,48px); line-height: 1; font-weight: 560; letter-spacing: -1.8px; }
.collection-hero > p { max-width: 720px; margin: 14px 0 0; color: #92928d; font-size: 17px; line-height: 1.4; }
.collection-counts { display: flex; align-items: center; gap: 12px; margin-top: 18px; font-size: 14px; }
.collection-counts i { width: 4px; height: 4px; border-radius: 50%; background: #aaa; }
.collection-owner { display: flex; align-items: center; gap: 8px; margin-top: 26px; font-size: 14px; }
.collection-owner img { width: 34px; height: 34px; border-radius: 5px; object-fit: cover; }
.follow-collection { height: 38px; margin-top: 18px; padding: 0 15px; border: 1px solid #111; border-radius: 6px; background: #111; color: #fff; font-size: 14px; cursor: pointer; }
.follow-collection.is-following { background: #fff; color: #111; }
.collection-people-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 32px clamp(12px,1.3vw,20px); }
.collection-people-grid .person-card img { aspect-ratio: 4/5; }

.collection-dialog { width: min(512px,calc(100vw - 28px)); padding: 0; overflow: visible; border: 0; border-radius: 12px; background: transparent; box-shadow: 0 28px 80px rgba(0,0,0,.2); }
.collection-dialog::backdrop { background: rgba(20,20,18,.28); backdrop-filter: blur(9px); -webkit-backdrop-filter: blur(9px); }
.collection-dialog-card { overflow: hidden; border-radius: 12px; background: #fff; }
.collection-dialog-card > header { display: flex; height: 70px; align-items: center; justify-content: space-between; padding: 0 22px; border-bottom: 1px solid #e5e5e1; }
.collection-dialog-card h2 { margin: 0; font-size: 16px; font-weight: 560; }
.dialog-close { display: grid; width: 34px; height: 34px; padding: 0; place-items: center; border: 0; border-radius: 6px; background: transparent; cursor: pointer; }
.dialog-close:hover { background: #f2f2ef; }
.dialog-close span { font-size: 20px; }
.collection-dialog-body { display: grid; gap: 22px; padding: 24px 22px 30px; }
.collection-dialog-body > label:not(.privacy-toggle) { display: grid; gap: 9px; font-size: 14px; font-weight: 520; }
.collection-dialog input[type="text"],.collection-dialog input[name="title"],.collection-dialog textarea { width: 100%; border: 1px solid transparent; border-radius: 5px; outline: 0; background: #f4f4f2; font-size: 14px; font-weight: 400; }
.collection-dialog input[name="title"] { height: 46px; padding: 0 12px; }
.collection-dialog textarea { min-height: 116px; padding: 12px; resize: vertical; }
.collection-dialog input:focus,.collection-dialog textarea:focus { border-color: #111; background: #fff; }
.privacy-toggle { display: flex; width: fit-content; align-items: center; gap: 10px; font-size: 14px; cursor: pointer; }
.privacy-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.privacy-toggle > span { position: relative; width: 39px; height: 23px; border-radius: 999px; background: #d8d8d4; transition: 180ms ease; }
.privacy-toggle > span::after { position: absolute; top: 3px; left: 3px; width: 17px; height: 17px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.25); content: ""; transition: 180ms ease; }
.privacy-toggle input:checked + span { background: #111; }
.privacy-toggle input:checked + span::after { transform: translateX(16px); }
.collection-dialog-card > footer { display: flex; min-height: 70px; align-items: center; justify-content: space-between; gap: 12px; padding: 15px 22px; border-top: 1px solid #e5e5e1; }
.collection-dialog-card > footer > div { display: flex; gap: 7px; margin-left: auto; }
.collection-dialog-card footer button { height: 38px; padding: 0 12px; border-radius: 6px; font-size: 14px; cursor: pointer; }
.dialog-delete { border: 1px solid #e2e2dd; background: #fff; color: #e32626; }
.button-secondary { border: 1px solid #deded9; background: #fff; color: #111; }
.button-primary { border: 1px solid #111; background: #111; color: #fff; }

@media (max-width: 1080px) { .collections-grid { grid-template-columns: repeat(3,minmax(0,1fr)); } .collection-people-grid { grid-template-columns: repeat(4,minmax(0,1fr)); } }
@media (max-width: 720px) {
  .collections-page { padding-top: 0; }
  .collections-page .sidebar { display: none; }
  .collections-main { padding: 78px 14px 92px; }
  .collections-toolbar { align-items: flex-start; }
  .collection-tabs { gap: 8px; }
  .collection-tabs button { padding: 7px 10px; font-size: 13px; }
  .add-collection-button { width: 38px; padding: 0; justify-content: center; font-size: 0; }
  .collections-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 34px 10px; padding-top: 28px; }
  .collection-card h2 { font-size: 15px; }
  .collection-detail-main { padding: 0 14px 90px; }
  .collection-detail-bar { height: 64px; }
  .collection-breadcrumb > span:not(.separator) { display: none; }
  .collection-hero { padding: 38px 8px 42px; }
  .collection-hero > p { font-size: 15px; }
  .collection-people-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px 10px; }
  .collection-dialog-card > footer { align-items: stretch; flex-direction: column-reverse; }
  .collection-dialog-card > footer > div { width: 100%; margin: 0; }
  .collection-dialog-card > footer > div button { flex: 1; }
}