:root {
      --color-primary: #3485e1;
      --color-secondary: #111111;
      --color-accent: #fed816;
      --color-brand-dot: #22c55e;
      --color-bg: #f7f8f3;
      --color-surface: #ffffff;
      --color-text: #222222;

      --font-base: "Inter", Arial, sans-serif;

      --space-1: 0.5rem;
      --space-2: 1rem;
      --space-3: 1.5rem;
      --space-4: 2rem;
      --space-5: 3rem;
      --space-6: 4rem;

      --radius: 1.25rem;
      --radius-sm: 0.75rem;
      --line: color-mix(in srgb, var(--color-text) 14%, transparent);
      --shadow: 0 1rem 3rem color-mix(in srgb, var(--color-secondary) 10%, transparent);
      --container: 1180px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background:
        linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 10%, transparent), transparent 32rem),
        var(--color-bg);
      color: var(--color-text);
      font-family: var(--font-base);
      font-size: 1rem;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
      text-decoration-thickness: 0.08em;
      text-underline-offset: 0.18em;
    }

    a:focus-visible,
    button:focus-visible {
      outline: 3px solid var(--color-primary);
      outline-offset: 3px;
      border-radius: var(--radius-sm);
    }

    p {
      margin: 0;
      line-height: 1.6;
    }

    h1,
    h2,
    h3,
    h4 {
      margin: 0;
      color: var(--color-secondary);
      line-height: 1.05;
      letter-spacing: -0.035em;
    }

    h1 {
      font-size: clamp(2rem, 6vw, 3.75rem);
      font-weight: 900;
    }

    h2 {
      font-size: clamp(2rem, 4vw, 3.75rem);
      font-weight: 900;
    }

    h3 {
      font-size: clamp(1.35rem, 2.2vw, 2rem);
      font-weight: 850;
    }

    h4 {
      font-size: 0.88rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .disclosure {
      background: var(--color-secondary);
      color: var(--color-surface);
      padding: var(--space-1) var(--space-2);
      text-align: center;
    }

    .disclosure p {
      max-width: 72rem;
      margin-inline: auto;
      font-size: 0.82rem;
      line-height: 1.45;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      border-bottom: 1px solid var(--line);
      background: color-mix(in srgb, var(--color-surface) 94%, transparent);
      backdrop-filter: blur(18px);
    }

    .header-inner {
      width: min(100% - 2rem, var(--container));
      min-height: 5rem;
      margin-inline: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-3);
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 0.55rem;
      flex: 0 0 auto;
      color: var(--color-secondary);
      font-weight: 900;
      font-size: clamp(1.15rem, 2.2vw, 1.35rem);
      letter-spacing: -0.025em;
      line-height: 1;
    }

    .brand:hover {
      text-decoration: none;
    }

    .brand-dot {
      width: 0.7rem;
      height: 0.7rem;
      border-radius: 50%;
      background: var(--color-brand-dot);
      box-shadow:
        0 0 0 0.18rem color-mix(in srgb, var(--color-brand-dot) 22%, transparent),
        0 0 0.7rem color-mix(in srgb, var(--color-brand-dot) 55%, transparent);
      flex: 0 0 auto;
    }

    .brand-text {
      display: inline-block;
    }

    .brand-text-accent {
      color: var(--color-primary);
    }

    .nav-toggle {
      position: absolute;
      opacity: 0;
      pointer-events: none;
    }

    .nav-label {
      display: none;
      align-items: center;
      gap: var(--space-1);
      min-height: 2.75rem;
      padding: 0 var(--space-2);
      border: 1px solid var(--line);
      border-radius: 999px;
      color: var(--color-secondary);
      font-weight: 800;
      cursor: pointer;
    }

    .primary-nav {
      display: flex;
      align-items: center;
      gap: var(--space-1);
    }

    .primary-nav a {
      padding: 0.75rem 1rem;
      border-radius: 999px;
      color: var(--color-secondary);
      font-size: 0.92rem;
      font-weight: 800;
    }

    .primary-nav a:hover {
      background: color-mix(in srgb, var(--color-primary) 12%, transparent);
      text-decoration: none;
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 3.25rem;
      padding: 0.85rem 1.25rem;
      border: 1px solid transparent;
      border-radius: 999px;
      font-weight: 850;
      line-height: 1.2;
      text-align: center;
      transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
    }

    .button:hover {
      transform: translateY(-1px);
      text-decoration: none;
    }

    .button-primary {
      background: var(--color-primary);
      color: var(--color-surface);
    }

    .button-primary:hover {
      background: color-mix(in srgb, var(--color-primary) 82%, var(--color-secondary));
    }

    .button-secondary {
      border-color: var(--color-secondary);
      color: var(--color-secondary);
      background: transparent;
    }

    .button-secondary:hover {
      background: var(--color-secondary);
      color: var(--color-surface);
    }

    .page-shell {
      width: min(100% - 2rem, var(--container));
      margin: var(--space-5) auto var(--space-6);
      display: grid;
      grid-template-columns: minmax(0, 1fr) 19rem;
      gap: var(--space-4);
      align-items: start;
    }

    .content {
      min-width: 0;
      display: grid;
      gap: var(--space-4);
    }

    .hero {
      display: block;
    }

    .hero-copy {
      display: grid;
      gap: var(--space-3);
    }

    .eyebrow {
      width: fit-content;
      padding-block: 0.25rem;
      border-top: 0.25rem solid var(--color-accent);
      color: var(--color-secondary);
      font-size: 0.82rem;
      font-weight: 900;
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }

    .dek {
      max-width: 44rem;
      color: var(--color-text);
      font-size: clamp(1.1rem, 2vw, 1.35rem);
      line-height: 1.55;
      font-weight: 500;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: var(--space-2);
      align-items: center;
    }

    .hero-media {
      overflow: hidden;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: var(--color-surface);
      box-shadow: var(--shadow);
      margin: 0;
    }

    .hero-media img {
      width: 100%;
      object-fit: cover;
    }

    .section {
      padding: var(--space-5);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--color-surface);
    }

    .section-muted {
      background:
        linear-gradient(135deg, color-mix(in srgb, var(--color-accent) 26%, transparent), transparent 22rem),
        var(--color-surface);
    }

    .section-header {
      display: grid;
      gap: var(--space-2);
      max-width: 47rem;
      margin-bottom: var(--space-4);
    }

    .section-header p {
      font-size: 1.08rem;
    }

    .text-flow {
      display: grid;
      gap: var(--space-3);
      max-width: 44rem;
    }

    .text-flow strong {
      color: var(--color-secondary);
      font-weight: 850;
    }

    .article-note {
      padding: var(--space-3);
      border-left: 0.35rem solid var(--color-accent);
      border-radius: var(--radius-sm);
      background: color-mix(in srgb, var(--color-accent) 18%, var(--color-surface));
      font-weight: 700;
    }

    .article-media {
      margin: 0;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--color-surface);
      width: fit-content;
      max-width: 300px;
    }

    .article-media img {
      width: 100%;
      object-fit: cover;
    }

    .article-media figcaption {
      padding: 0.75rem var(--space-3) var(--space-3);
      color: color-mix(in srgb, var(--color-text) 76%, transparent);
      font-size: 0.9rem;
      line-height: 1.45;
    }

    .pull-quote {
      margin: var(--space-1) 0;
      padding: var(--space-3);
      border-top: 0.35rem solid var(--color-secondary);
      border-bottom: 1px solid var(--line);
      color: var(--color-secondary);
      font-size: clamp(1.35rem, 2.6vw, 2rem);
      font-weight: 900;
      line-height: 1.2;
      letter-spacing: .02rem;
    }

    .rank-title {
      display: grid;
      gap: var(--space-1);
    }

    .rank-title span {
      color: color-mix(in srgb, var(--color-text) 74%, transparent);
      font-size: 0.98rem;
      font-weight: 700;
      letter-spacing: normal;
    }

    .source-list {
      margin: 0;
      padding-left: 1.25rem;
      display: grid;
      gap: var(--space-1);
      overflow-wrap: anywhere;
    }

    .source-list li {
      padding-left: 0.25rem;
      scroll-margin-top: 7rem;
    }

    sup a {
      color: var(--color-primary);
      font-weight: 900;
    }

    .criteria-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: var(--space-2);
    }

    .criteria-card {
      min-height: 100%;
      padding: var(--space-3);
      border: 1px solid var(--line);
      border-radius: var(--radius-sm);
      background: color-mix(in srgb, var(--color-bg) 72%, var(--color-surface));
      display: grid;
      gap: var(--space-1);
    }

    .criteria-card h3 {
      font-size: 1.15rem;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }

    .criteria-card p {
      font-size: 0.96rem;
    }

    .product-list {
      display: grid;
      gap: var(--space-3);
    }

    .product-card {
      display: grid;
      grid-template-columns: 14rem minmax(0, 1fr);
      gap: var(--space-3);
      align-items: center;
      padding: var(--space-3);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--color-surface);
    }

    /* Direct .text-flow sibling (e.g. Oura): span both columns — width comes from placement, not a new template. */
    .product-card > .text-flow {
      grid-column: 1 / -1;
      max-width: none;
      min-width: 0;
    }

    .product-card:has(> .text-flow) {
      align-items: start;
    }

    .product-card img {
      width: 100%;
      max-height: 14rem;
      object-fit: contain;
      border-radius: var(--radius-sm);
      background: color-mix(in srgb, var(--color-bg) 82%, var(--color-surface));
    }

    .product-card > .article-media {
      grid-column: 1;
      grid-row: 1;
    }

    .product-card > .article-media + .product-copy {
      display: contents;
    }

    .product-card > .article-media + .product-copy > .rank-title {
      grid-column: 2;
      grid-row: 1;
      align-self: center;
    }

    .product-card > .article-media + .product-copy > p {
      grid-column: 1 / -1;
      max-width: none;
    }

    .product-copy {
      display: grid;
      gap: var(--space-2);
    }

    .product-card > .product-copy:only-child {
      grid-column: 1 / -1;
    }

    .product-copy h3 {
      line-height: 1.1;
    }

    .product-copy p {
      max-width: 38rem;
    }

    .legal-shell,
    .narrow-shell {
      grid-template-columns: minmax(0, 1fr);
    }

    .legal-flow {
      max-width: 52rem;
    }

    .about-flow {
      max-width: 50rem;
      font-size: 1.05rem;
    }

    .about-flow p {
      line-height: 1.7;
    }

    .contact-card {
      display: grid;
      gap: var(--space-2);
      padding: var(--space-4);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background:
        linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 8%, transparent), transparent 18rem),
        var(--color-bg);
    }

    .contact-label {
      font-size: 0.82rem;
      font-weight: 900;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: color-mix(in srgb, var(--color-text) 70%, transparent);
    }

    .contact-email {
      display: inline-block;
      color: var(--color-primary);
      font-size: clamp(1.5rem, 4vw, 2.25rem);
      font-weight: 900;
      letter-spacing: -0.02em;
      line-height: 1.1;
      word-break: break-all;
    }

    .contact-email:hover {
      text-decoration: underline;
      text-decoration-thickness: 0.06em;
      text-underline-offset: 0.18em;
    }

    .contact-note {
      color: color-mix(in srgb, var(--color-text) 78%, transparent);
      font-size: 0.95rem;
    }

    .legal-flow h2 {
      margin-top: var(--space-3);
      font-size: clamp(1.5rem, 2.6vw, 2rem);
      letter-spacing: -0.02em;
    }

    .legal-flow h3 {
      margin-top: var(--space-2);
      font-size: 1.15rem;
      letter-spacing: -0.01em;
    }

    .legal-flow a {
      color: var(--color-primary);
      text-decoration: underline;
      text-decoration-thickness: 0.06em;
      text-underline-offset: 0.18em;
    }

    .legal-list {
      margin: 0;
      padding-left: 1.25rem;
      display: grid;
      gap: var(--space-2);
    }

    .legal-list li {
      padding-left: 0.25rem;
    }

    .sidebar {
      position: sticky;
      top: 6.5rem;
      display: grid;
      gap: var(--space-3);
    }

    .sidebar-card {
      padding: var(--space-3);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--color-surface);
      box-shadow: 0 0.75rem 2rem color-mix(in srgb, var(--color-secondary) 7%, transparent);
      display: grid;
      gap: var(--space-2);
    }

    .sidebar-card h2 {
      font-size: 1.25rem;
      letter-spacing: -0.02em;
    }

    .sidebar-card p {
      font-size: 0.94rem;
    }

    .sidebar-link {
      color: var(--color-primary);
      font-size: 0.94rem;
      font-weight: 800;
      letter-spacing: -0.005em;
    }

    .sidebar-link:hover {
      text-decoration: underline;
      text-decoration-thickness: 0.08em;
      text-underline-offset: 0.18em;
    }

    .sidebar-product {
      display: grid;
      gap: var(--space-2);
    }

    .sidebar-product img {
      width: 100%;
      max-height: 8rem;
      object-fit: contain;
      border-radius: var(--radius-sm);
      background: var(--color-bg);
    }

    .site-footer {
      border-top: 1px solid var(--line);
      background: var(--color-secondary);
      color: var(--color-surface);
    }

    .footer-primary {
      width: min(100% - 2rem, var(--container));
      margin-inline: auto;
      padding: var(--space-3) 0;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: var(--space-2);
      font-size: 0.92rem;
      font-weight: 700;
    }

    .footer-primary a {
      color: var(--color-surface);
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: var(--space-2);
    }

    .footer-disclaimer {
      background: var(--color-bg);
      color: var(--color-text);
    }

    .footer-disclaimer p {
      width: min(100% - 2rem, var(--container));
      margin-inline: auto;
      padding: var(--space-3) 0;
      font-size: 0.78rem;
      line-height: 1.55;
      text-align: center;
    }

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

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

      .hero-media img {
        aspect-ratio: 16 / 10;
      }

      .sidebar {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 720px) {
      .header-inner {
        min-height: 4.5rem;
      }

      .nav-label {
        display: inline-flex;
      }

      .primary-nav {
        position: absolute;
        left: 1rem;
        right: 1rem;
        top: calc(100% + 0.5rem);
        padding: var(--space-2);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: var(--color-surface);
        box-shadow: var(--shadow);
        display: none;
        flex-direction: column;
        align-items: stretch;
      }

      .primary-nav a {
        text-align: center;
      }

      .nav-toggle:checked ~ .primary-nav {
        display: flex;
      }

      .page-shell {
        width: min(100% - 1rem, var(--container));
        margin-top: var(--space-3);
        gap: var(--space-3);
      }

      .section {
        padding: var(--space-3);
      }

      .criteria-grid,
      .sidebar {
        grid-template-columns: 1fr;
      }

      .product-card {
        grid-template-columns: 1fr;
      }

      .product-card > .article-media,
      .product-card > .article-media + .product-copy,
      .product-card > .article-media + .product-copy > .rank-title,
      .product-card > .article-media + .product-copy > p,
      .product-card > .text-flow {
        grid-column: auto;
        grid-row: auto;
        margin: auto;
      }

      .footer-primary {
        flex-direction: column;
        align-items: center;
        text-align: center;
      }
    }