:root {
  --models-bg: #f5f9fc;
  --models-surface: rgba(255, 255, 255, 0.9);
  --models-ink: #10283d;
  --models-muted: #6f8497;
  --models-line: rgba(17, 168, 242, 0.18);
  --models-accent: #11a8f2;
  --models-accent-deep: #007fc2;
  --models-shadow: 0 22px 58px rgba(16, 40, 61, 0.1);
}

body {
  background:
    radial-gradient(circle at 12% 0%, rgba(17, 168, 242, 0.16), transparent 32%),
    linear-gradient(180deg, #fbfdff 0%, var(--models-bg) 100%);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  min-height: 82px;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.topnav a {
  position: relative;
  padding: 11px 17px;
  border-radius: 999px;
  text-decoration: none;
  color: #38566c;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: 0.25s ease;
}

.topnav a:hover {
  background: rgba(17, 168, 242, 0.1);
  color: var(--models-accent-deep);
}

.topnav a.active {
  background: linear-gradient(135deg, var(--models-accent), var(--models-accent-deep));
  color: #fff;
  box-shadow: 0 18px 46px rgba(17, 168, 242, 0.14);
}

.catalog {
  padding-bottom: 80px;
  padding-top: 80px;
}

.catalog-hero {
  padding: 34px 0 18px;
}

.catalog-hero-inner {
  /* padding: clamp(24px, 4vw, 44px); */
}

.catalog-hero h1 {
  margin: 0 0 22px;
  font-family: "Inter", "Segoe UI", sans-serif;
  font-size: clamp(54px, 7vw, 96px);
  font-weight: 900;
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: #0f4f82;
}

.model-search {
  display: grid;
  gap: 8px;
  max-width: 100%;
}

.model-search span {
  color: var(--models-accent-deep);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-left: 5px;
}

.model-search input {
  width: 100%;
  min-height: 58px;
  padding: 0 20px;
  border: 1px solid rgba(17, 168, 242, 0.24);
  border-radius: 16px;
  outline: 0;
  background: #fff;
  color: var(--models-ink);
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 14px 34px rgba(16, 40, 61, 0.08);
}

.model-search input:focus {
  border-color: var(--models-accent);
  box-shadow: 0 0 0 4px rgba(17, 168, 242, 0.12);
}

.models-section {
  padding: 14px 0 0;
}

.model-viewer {
  margin-bottom: 22px;
  padding: 16px;
  border: 1px solid var(--models-line);
  border-radius: 24px;
  background: var(--models-surface);
  box-shadow: var(--models-shadow);
}

.model-viewer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.model-viewer-head p {
  margin: 0 0 6px;
  color: var(--models-accent-deep);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.model-viewer-head h2 {
  margin: 0;
  font-size: clamp(22px, 2.2vw, 34px);
  line-height: 1.1;
}

.viewer-close {
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: #eef8ff;
  color: var(--models-accent-deep);
  cursor: pointer;
  font-size: 28px;
  line-height: 1;
}

.model-frame {
  overflow: hidden;
  min-height: min(68vh, 680px);
  border: 1px solid rgba(17, 168, 242, 0.22);
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 0%, rgba(17, 168, 242, 0.14), transparent 42%),
    linear-gradient(180deg, #fafdff, #eef8ff);
}

.model-frame iframe {
  display: block;
  width: 100%;
  height: min(68vh, 680px);
  min-height: 520px;
  border: 0;
}

.models-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.model-card {
  min-width: 0;
}

.model-open {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  align-items: stretch;
  gap: 14px;
  width: 100%;
  min-height: 128px;
  padding: 14px;
  border: 1px solid var(--models-line);
  border-radius: 20px;
  background: var(--models-surface);
  color: inherit;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 16px 42px rgba(16, 40, 61, 0.08);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.model-open:hover {
  transform: translateY(-3px);
  border-color: rgba(17, 168, 242, 0.36);
  box-shadow: 0 24px 58px rgba(16, 40, 61, 0.12);
}

.model-preview {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 16px;
  background:
    radial-gradient(circle at 30% 18%, rgba(255, 255, 255, 0.72), transparent 30%),
    linear-gradient(135deg, var(--models-accent), var(--models-accent-deep));
}

.model-preview img {
  width: 100%;
  height: 100%;
  min-height: 100px;
  object-fit: cover;
  filter: saturate(1.06) contrast(1.03);
}

.model-preview span {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 8px;
  padding: 6px 8px;
  border-radius: 999px;
  background: rgba(0, 127, 194, 0.86);
  color: #fff;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
}

.model-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.model-tag {
  margin-bottom: 8px;
  color: var(--models-accent-deep);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.model-copy strong {
  display: block;
  color: var(--models-ink);
  font-size: 17px;
  line-height: 1.25;
}

.empty-search {
  margin: 22px 0 0;
  padding: 18px;
  border: 1px dashed rgba(17, 168, 242, 0.34);
  border-radius: 16px;
  color: var(--models-muted);
  font-weight: 700;
  text-align: center;
}

@media (max-width: 1100px) {
  .models-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .topbar-inner {
    flex-direction: column;
    justify-content: center;
    padding: 14px 0;
    min-height: auto;
  }

  .topnav {
    justify-content: center;
  }

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

  .catalog-hero {
    padding-top: 24px;
  }

  .model-open {
    grid-template-columns: 78px minmax(0, 1fr);
  }

  .model-frame,
  .model-frame iframe {
    min-height: 420px;
  }
}

/* ===================================================
   MODELS PAGE — Mobile improvements
   =================================================== */

@media (max-width: 760px) {
  /* Catalog header — keep brand + hamburger in one row */
  .topbar-inner {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0 6px;
    min-height: auto;
    gap: 10px;
  }

  /* Nav links scroll horizontally instead of wrapping */
  .topnav {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 4px;
    padding: 8px 0 10px;
    border-top: 1px solid rgba(17,168,242,0.12);
  }

  .topnav.open {
    display: flex;
  }

  .topnav a {
    padding: 13px 16px;
    font-size: 13px;
    border-radius: 12px;
    text-align: left;
    width: 100%;
  }

  /* Catalog hero */
  .catalog-hero {
    padding-top: 18px;
  }

  .catalog-hero-inner {
    padding: 18px;
    border-radius: 16px;
  }

  .catalog-hero h1 {
    font-size: clamp(44px, 14vw, 72px);
    margin-bottom: 14px;
  }

  /* Search */
  .model-search input {
    font-size: 16px; /* prevent iOS zoom */
    min-height: 50px;
    border-radius: 12px;
  }

  /* Models grid — single column on mobile */
  .models-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* Model card */
  .model-open {
    grid-template-columns: 76px minmax(0,1fr);
    gap: 12px;
    min-height: 108px;
    padding: 12px;
    border-radius: 16px;
  }

  .model-preview {
    border-radius: 12px;
  }

  .model-preview img {
    min-height: 84px;
  }

  .model-preview span {
    font-size: 9px;
    padding: 4px 6px;
  }

  .model-copy strong {
    font-size: 16px;
    line-height: 1.25;
  }

  .model-tag {
    font-size: 10px;
    margin-bottom: 5px;
  }

  /* Model viewer (iframe) */
  .model-viewer {
    padding: 12px;
    border-radius: 18px;
    margin-bottom: 16px;
  }

  .model-viewer-head {
    margin-bottom: 10px;
    gap: 10px;
  }

  .model-viewer-head h2 {
    font-size: 20px;
  }

  .model-viewer-head p {
    font-size: 11px;
  }

  .viewer-close {
    width: 40px;
    height: 40px;
    font-size: 24px;
    flex-shrink: 0;
  }

  .model-frame {
    min-height: min(70vw, 380px);
    border-radius: 14px;
  }

  .model-frame iframe {
    height: min(70vw, 380px);
    min-height: 280px;
  }
}

/* Very small phones */
@media (max-width: 390px) {
  .model-open {
    grid-template-columns: 64px minmax(0,1fr);
    gap: 10px;
  }

  .model-copy strong {
    font-size: 14px;
  }

  .catalog-hero h1 {
    font-size: 42px;
  }
}

/* Touch improvements */
@media (hover: none) and (pointer: coarse) {
  .model-open:hover {
    transform: none;
    box-shadow: 0 16px 42px rgba(16,40,61,0.08);
    border-color: rgba(17,168,242,0.18);
  }

  .topnav a {
    -webkit-tap-highlight-color: rgba(17,168,242,0.15);
  }
}

/* Show hamburger in catalog header on mobile */
@media (max-width: 760px) {
  .topbar-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .menu-toggle {
    display: grid;
  }
}