.page {
      width: min(var(--container), calc(100% - 48px));
      min-height: calc(100vh - 98px);
      margin: auto;
      padding: 102px 0 72px;
    }

    .crumb {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin: 0 0 16px;
      color: var(--muted);
      font-size: 0.84rem;
      font-weight: 500;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    .crumb::before {
      content: "";
      width: 6px;
      height: 6px;
      border-left: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      transform: rotate(45deg);
    }
    .crumb:hover { color: var(--accent); }

    .page-heading {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 56px;
      align-items: end;
      margin-bottom: 34px;
    }

    .eyebrow {
      margin: 0 0 6px;
      color: var(--accent);
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.11em;
      text-transform: uppercase;
    }

    h1, h2, h3 { font-family: var(--heading); text-wrap: balance; }
    h1 {
      margin: 0;
      font-size: clamp(2.6rem, 5.2vw, 4rem);
      font-weight: 500;
      line-height: 1.02;
      letter-spacing: -0.04em;
    }

    .page-intro p { max-width: 58ch; margin: 0; color: var(--muted); font-size: 0.98rem; line-height: 1.65; text-wrap: pretty; }
    .page-intro p + p { margin-top: 8px; }
    .page-intro p a { color: var(--accent); text-underline-offset: 3px; }
    .actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 22px; margin-top: 18px; }
    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 40px;
      padding: 8px 15px;
      border: 1px solid var(--ink);
      border-radius: 8px;
      color: var(--paper);
      background: var(--ink);
      font-size: 0.82rem;
      font-weight: 600;
      text-decoration: none;
      white-space: nowrap;
      transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }
    .button:hover { color: #fff; border-color: var(--accent); background: var(--accent); transform: translateY(-2px); }
    .button:active { transform: translateY(0) scale(0.98); }
    .text-link {
      color: var(--accent);
      font-size: 0.86rem;
      font-weight: 600;
      text-decoration: none;
      text-underline-offset: 3px;
    }
    .text-link:hover { text-decoration: underline; }

    .search {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      align-items: center;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }
    .search input {
      width: 100%;
      min-height: 54px;
      padding: 14px 3px;
      border: 0;
      border-radius: 4px;
      color: var(--ink);
      background: transparent;
      font: inherit;
      font-size: 0.94rem;
    }
    .search input::placeholder { color: var(--muted); opacity: 0.8; }
    .search input:focus-visible { background: var(--accent-soft); outline-offset: -3px; }
    .search-status {
      min-width: 104px;
      margin: 0;
      padding: 4px 2px 4px 20px;
      border-left: 1px solid var(--line);
      color: var(--muted);
      font-size: 0.75rem;
      font-variant-numeric: tabular-nums;
      text-align: right;
      white-space: nowrap;
    }

    .topic-nav { padding: 16px 0; border-bottom: 1px solid var(--line); }
    .topic-nav ul { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
    .topic-nav a {
      display: inline-flex;
      align-items: baseline;
      gap: 7px;
      padding: 5px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      color: var(--ink);
      font-size: 0.84rem;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
    }
    .topic-nav a:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
    .topic-nav a[aria-disabled="true"] { opacity: 0.42; pointer-events: none; }
    .topic-nav span { color: var(--accent); font-size: 0.72rem; font-weight: 600; font-variant-numeric: tabular-nums; }

    .video-section {
      display: grid;
      grid-template-columns: 0.55fr 1.45fr;
      gap: 56px;
      align-items: start;
      padding: 40px 0;
      border-bottom: 1px solid var(--line);
      scroll-margin-top: 88px;
    }
    .section-label { position: sticky; top: 104px; }
    .section-label h2 { margin: 0; font-size: clamp(1.5rem, 2.6vw, 1.95rem); font-weight: 500; line-height: 1.15; letter-spacing: -0.02em; }
    .section-label p { max-width: 30ch; margin: 8px 0 0; color: var(--muted); font-size: 0.86rem; line-height: 1.55; text-wrap: pretty; }
    .section-label a { color: var(--accent); text-underline-offset: 3px; }

    .video-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
    .lesson-video {
      position: relative;
      display: grid;
      grid-template-columns: 88px minmax(0, 1fr);
      gap: 18px;
      align-items: start;
      padding: 12px;
      border: 1px solid var(--line);
      border-radius: 12px;
      background: var(--paper);
      transition: border-color 0.2s ease, transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .lesson-video.wide { grid-template-columns: 216px minmax(0, 1fr); }
    .lesson-video:hover { border-color: var(--accent); transform: translateY(-2px); }
    .thumb { position: relative; overflow: hidden; border-radius: 8px; background: var(--paper-soft); }
    .thumb img { display: block; width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; }
    .wide .thumb img { aspect-ratio: 16 / 9; }
    .thumb::after {
      content: "";
      position: absolute;
      right: 6px;
      bottom: 6px;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: rgba(20, 18, 30, 0.72) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M3 2l5 3-5 3z' fill='white'/%3E%3C/svg%3E") center / 11px no-repeat;
    }
    .video-copy { min-width: 0; padding: 2px 4px 2px 0; }
    .kicker { margin: 0 0 2px; color: var(--accent); font-size: 0.7rem; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; }
    .lesson-video h3 { margin: 0; font-size: 1.1rem; font-weight: 500; line-height: 1.32; overflow-wrap: anywhere; }
    .lesson-video h3 a { color: var(--ink); text-decoration: none; transition: color 0.2s ease; }
    .lesson-video h3 a::after { content: ""; position: absolute; inset: 0; border-radius: 12px; }
    .lesson-video:hover h3 a { color: var(--accent); }
    .lesson-video h3 a:focus-visible { outline: none; }
    .lesson-video h3 a:focus-visible::after { outline: 3px solid var(--accent); outline-offset: 3px; }
    .blurb { margin: 6px 0 0; color: var(--muted); font-size: 0.86rem; line-height: 1.58; text-wrap: pretty; }
    .video-list:has(> .tall) { grid-template-columns: repeat(auto-fill, minmax(148px, 1fr)); gap: 14px; }
    .lesson-video.tall { grid-template-columns: 1fr; gap: 10px; padding: 8px 8px 12px; }
    .lesson-video.tall .video-copy { padding: 0 2px; }
    .lesson-video.tall h3 { font-size: 0.94rem; line-height: 1.36; }
    .wide .blurb { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .badge {
      display: inline-block;
      padding: 1px 9px;
      border-radius: 999px;
      color: var(--accent);
      background: var(--accent-soft);
      font-family: var(--body);
      font-size: 0.68rem;
      font-weight: 600;
      letter-spacing: 0.07em;
      text-transform: uppercase;
      vertical-align: middle;
    }

    .empty-state { padding: 48px 0 52px; border-bottom: 1px solid var(--line); }
    .empty-state h2 { margin: 0; font-size: 1.6rem; font-weight: 500; }
    .empty-state p { max-width: 44ch; margin: 7px 0 0; color: var(--muted); font-size: 0.9rem; }

    .plan { padding-top: 6px; }
    .plan h2 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.15rem); font-weight: 500; letter-spacing: -0.02em; }
    .plan > p { max-width: 62ch; margin: 6px 0 8px; color: var(--muted); font-size: 0.9rem; }
    .plan-group {
      display: grid;
      grid-template-columns: 0.55fr 1.45fr;
      gap: 56px;
      align-items: start;
      padding: 26px 0;
      border-bottom: 1px solid var(--line);
    }
    .plan-group h3 { position: sticky; top: 104px; margin: 0; font-size: 1.25rem; font-weight: 500; line-height: 1.25; }
    .plan-group ol { grid-column: 2; margin: 0; padding: 0 0 0 2.2em; }
    .plan-group li { padding: 7px 0 7px 6px; font-size: 0.94rem; line-height: 1.5; text-wrap: pretty; }
    .plan-group li + li { border-top: 1px solid var(--line); }
    .plan-group li::marker { color: var(--accent); font-size: 0.8rem; font-weight: 600; font-variant-numeric: tabular-nums; }

    .more-series { margin-top: 40px; }
    .more-series h2 { margin: 0 0 12px; font-size: 1.3rem; font-weight: 500; }
    .more-series ul { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 0; padding: 0; list-style: none; }
    .more-series li {
      position: relative;
      padding: 14px 16px;
      border: 1px solid var(--line);
      border-left: 4px solid var(--accent);
      border-radius: 12px;
      background: var(--paper);
      transition: border-color 0.2s ease;
    }
    .more-series li:hover { border-color: var(--accent); }
    .more-series a { color: var(--ink); font-family: var(--heading); font-size: 1.05rem; text-decoration: none; }
    .more-series a::after { content: ""; position: absolute; inset: 0; border-radius: 12px; }
    .more-series a:focus-visible { outline: none; }
    .more-series a:focus-visible::after { outline: 3px solid var(--accent); outline-offset: 3px; }
    .more-series li:hover a { color: var(--accent); }
    .more-series p { margin: 2px 0 0; color: var(--muted); font-size: 0.82rem; line-height: 1.5; }

    [hidden] { display: none !important; }

    @media (max-width: 860px) {
      .page-heading { grid-template-columns: 1fr; gap: 16px; margin-bottom: 28px; }
      .video-section { grid-template-columns: 1fr; gap: 18px; padding: 32px 0; scroll-margin-top: 76px; }
      .section-label { position: static; }
      .section-label p { max-width: 60ch; }
      .more-series ul { grid-template-columns: 1fr; }
      .plan-group { grid-template-columns: 1fr; gap: 10px; padding: 22px 0; }
      .plan-group h3 { position: static; }
      .plan-group ol { grid-column: 1; }
    }

    @media (max-width: 700px) {
      .page { width: min(100% - 40px, var(--container)); padding: 98px 0 56px; }
      h1 { font-size: clamp(2.3rem, 11vw, 3.2rem); }
      .page-intro p { font-size: 0.94rem; }
      .button { min-height: 44px; padding: 10px 17px; }
      .search input { min-height: 52px; font-size: 1rem; }
      .search-status { min-width: 88px; padding-left: 13px; }
      .topic-nav ul { gap: 6px; }
      .topic-nav a { padding: 4px 10px; font-size: 0.8rem; }
      .lesson-video { grid-template-columns: 68px minmax(0, 1fr); gap: 14px; padding: 10px; }
      .video-list:has(> .tall) { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
      .lesson-video.tall { grid-template-columns: 1fr; gap: 8px; padding: 6px 6px 10px; }
      .lesson-video.wide { grid-template-columns: 1fr; gap: 12px; }
      .lesson-video.wide .video-copy { padding: 0 4px 4px; }
      .lesson-video h3 { font-size: 1.04rem; }
      .blurb { font-size: 0.85rem; }
      .lesson-video:hover { transform: none; }
    }

    @keyframes rise-in {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @media (prefers-reduced-motion: no-preference) {
      .page-heading, .search, .topic-nav, .video-section, .plan { animation: rise-in 0.58s cubic-bezier(0.16, 1, 0.3, 1) backwards; }
      .search, .topic-nav { animation-delay: 0.05s; }
      .video-section, .plan { animation-delay: 0.09s; }
    }