.ece-platform {
  --ece-purple: #512888;
  --ece-ink: #292536;
  --ece-muted: #706a7c;
  --ece-border: #e4dfea;
  --ece-paper: #fbfafc;
  max-width: 1380px !important;
  color: var(--ece-ink);
  font-size: 16px;
}
.ece-platform [hidden] { display: none !important; }
.ece-platform a { color: var(--ece-purple); text-decoration: none; }
.ece-platform a:hover { text-decoration: underline; }
.ece-platform :focus-visible { outline: 3px solid #9a71c5; outline-offset: 4px; }
.ece-topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--ece-border); padding: 1rem 0; margin-bottom: 2rem; font-size: .75rem; }
.ece-topbar > span { color: var(--ece-muted); font-size: .65rem; letter-spacing: .07em; }
.ece-topbar__separator { margin: 0 .65rem; color: #c6b9d4; }
.ece-shell { display: grid; grid-template-columns: 254px minmax(0, 1fr); gap: 2.5rem; align-items: start; }
.ece-sidebar { position: sticky; top: 1.5rem; max-height: calc(100vh - 3rem); overflow-y: auto; padding: 0 .9rem .75rem 0; scrollbar-width: thin; }
.ece-brand { display: flex; flex-direction: column; gap: .3rem; font-size: .8rem; }
.ece-brand__code { font-size: 1.65rem; letter-spacing: .035em; }
.ece-brand__code strong { font-weight: 750; }
.ece-progress { margin: 1.5rem 0; padding: 1rem; border: 1px solid var(--ece-border); border-radius: 10px; background: var(--ece-paper); }
.ece-progress > div { display: flex; justify-content: space-between; gap: .5rem; font-size: .68rem; }
.ece-progress strong { white-space: nowrap; font-variant-numeric: tabular-nums; }
.ece-progress progress { display: block; width: 100%; height: 5px; margin: .65rem 0; border: 0; border-radius: 8px; background: #e9e2f0; accent-color: var(--ece-purple); overflow: hidden; }
.ece-progress progress::-webkit-progress-bar { background: #e9e2f0; }
.ece-progress progress::-webkit-progress-value { background: var(--ece-purple); border-radius: 8px; }
.ece-progress small { color: var(--ece-muted); font-size: .62rem; }
.ece-navigation > summary { font-size: .78rem; font-weight: 650; padding: .65rem 0; border-bottom: 1px solid var(--ece-border); }
.ece-platform summary { cursor: pointer; }
.ece-navigation summary > span { float: right; color: var(--ece-muted); font-size: .65rem; font-weight: 400; }
.ece-overview-link { display: block; padding: .7rem .6rem; margin-top: .5rem; border-radius: 6px; font-size: .75rem; }
.ece-nav-group { margin-top: .3rem; }
.ece-nav-group > summary { padding: .6rem .2rem; color: var(--ece-ink); font-size: .71rem; line-height: 1.6; }
.ece-nav-group ol { list-style: none; margin: 0; padding: 0; }
.ece-nav-group li { margin: .1rem 0; }
.ece-nav-group a { display: flex; gap: .5rem; align-items: baseline; border-radius: 6px; padding: .6rem .5rem; color: var(--ece-muted); font-size: .66rem; line-height: 1.45; }
.ece-nav-id { min-width: 2.2rem; font-size: .62rem; color: var(--ece-purple); font-variant-numeric: tabular-nums; }
.ece-nav-release { display: block; font-size: .56rem; color: var(--ece-muted); font-weight: 400; margin-top: .25rem; }
.ece-read-dot { margin-left: auto; color: #34745f; }
.ece-platform a[aria-current="page"] { background: #eee6f6; color: var(--ece-purple); font-weight: 600; }
.ece-content { min-width: 0; padding-bottom: 2rem; }
.ece-header { margin: .2rem 0 1.7rem; }
.ece-eyebrow, .ece-kicker { color: var(--ece-purple); font-size: .65rem; font-weight: 650; letter-spacing: .075em; margin: 0 0 .8rem; }
.ece-eyebrow span { color: #b3a2c7; margin: 0 .5rem; }
.ece-header h1 { margin: 0 0 .85rem; font-size: clamp(1.7rem, 3.2vw, 2.5rem); line-height: 1.22; letter-spacing: -.025em; }
.ece-intro { max-width: 760px; color: var(--ece-muted); font-size: .9rem; line-height: 1.8; margin: 0; }
.ece-body p { line-height: 1.8; }
.ece-hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 1.8rem; padding: 1.8rem; border: 1px solid #ddd0eb; border-radius: 16px; background: #f5f0fa; }
.ece-hero h2 { font-size: 1.35rem; line-height: 1.4; margin: .6rem 0; }
.ece-hero__copy > p:not(.ece-kicker) { font-size: .8rem; color: var(--ece-muted); margin: .65rem 0 1.2rem; }
.ece-hero__actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.ece-platform .ece-button { display: inline-flex; justify-content: space-between; align-items: center; gap: 1.3rem; padding: .7rem 1rem; background: var(--ece-purple); border: 1px solid var(--ece-purple); color: #fff; border-radius: 7px; font-size: .75rem; line-height: 1.4; }
.ece-platform .ece-button:hover { background: #41216d; text-decoration: none; }
.ece-platform .ece-button--secondary { color: var(--ece-purple); background: transparent; border-color: #c6b2dc; }
.ece-platform .ece-button--secondary:hover { background: #e9dff2; }
.ece-hero__diagram { color: var(--ece-purple); align-self: center; }
.ece-diagram-label { text-align: center; font-size: .55rem; letter-spacing: .12em; color: #8a759f; }
.ece-hero__diagram svg { display: block; width: 100%; height: auto; }
.ece-hero__diagram text { fill: currentColor; font-family: inherit; font-size: 9px; letter-spacing: 1px; }
.ece-hero__numbers { display: flex; justify-content: center; gap: 2rem; }
.ece-hero__numbers > div { display: flex; flex-direction: column; }
.ece-hero__numbers strong { font-size: 1.6rem; font-weight: 650; line-height: 1.4; }
.ece-hero__numbers span { font-size: .52rem; letter-spacing: .09em; color: #8a759f; }
.ece-framework-note { display: flex; align-items: baseline; gap: .8rem; margin: 1.1rem 0 2.2rem; }
.ece-framework-note p { color: var(--ece-muted); font-size: .72rem; margin: 0; }
.ece-status { display: inline-block; padding: .25rem .5rem; border-radius: 5px; background: #f0edf4; color: #796489; font-size: .6rem; font-weight: 500; line-height: 1.5; white-space: nowrap; }
.ece-status--live { background: #e7f4ee; color: #28694f; }
.ece-section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.2rem; }
.ece-section-heading h2 { font-size: 1.1rem; margin: 0; }
.ece-section-heading > span { color: var(--ece-muted); font-size: .7rem; white-space: nowrap; }
.ece-filters { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr) minmax(0, .8fr); gap: .8rem; margin-bottom: 1.8rem; }
.ece-filters label { display: block; margin: 0 0 .45rem; color: var(--ece-muted); font-size: .65rem; font-weight: 500; }
.ece-platform input[type="search"], .ece-platform select { display: block; width: 100%; height: 42px; border: 1px solid var(--ece-border); border-radius: 7px; background: #fff; padding: .55rem .7rem; font: inherit; font-size: .72rem; color: var(--ece-ink); margin: 0; box-shadow: none; }
.ece-topic-group { margin-bottom: 1.8rem; scroll-margin-top: 1.5rem; }
.ece-group-heading { display: flex; align-items: baseline; gap: .65rem; padding-bottom: .65rem; margin-bottom: .8rem; border-bottom: 1px solid var(--ece-border); }
.ece-group-heading > span { font-size: .65rem; color: #a698b3; font-variant-numeric: tabular-nums; }
.ece-group-heading h3 { font-size: .9rem; font-weight: 600; margin: 0; }
.ece-group-heading small { margin-left: auto; color: var(--ece-muted); font-size: .6rem; white-space: nowrap; }
.ece-lecture-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.ece-lecture-card { display: flex; flex-direction: column; min-width: 0; padding: 1.1rem; border: 1px solid var(--ece-border); border-radius: 10px; background: #fff; }
.ece-card-meta { display: flex; align-items: center; justify-content: space-between; gap: .5rem; margin-bottom: .8rem; }
.ece-lecture-id { font-size: .7rem; color: var(--ece-purple); font-weight: 650; letter-spacing: .05em; }
.ece-lecture-card h4 { font-size: .91rem; font-weight: 650; margin: 0 0 .5rem; line-height: 1.5; }
.ece-lecture-card h4 a { color: var(--ece-ink); }
.ece-lecture-card h4 span { color: #a998bc; margin-left: .2rem; }
.ece-lecture-card > p { font-size: .73rem; color: var(--ece-muted); margin: 0 0 1rem; }
.ece-card-footer { display: flex; flex-wrap: wrap; gap: .35rem 1rem; margin-top: auto; padding-top: .7rem; border-top: 1px solid #f0edf3; font-size: .6rem; color: #918599; }
.ece-card-footer span:last-child:not(:first-child) { color: #34745f; }
.ece-empty { padding: 2rem; text-align: center; color: var(--ece-muted); background: var(--ece-paper); border: 1px dashed var(--ece-border); border-radius: 10px; font-size: .8rem; }
.ece-source-note { font-size: .6rem; color: var(--ece-muted); overflow-wrap: anywhere; border-top: 1px solid var(--ece-border); padding-top: 1rem; }
.ece-platform code { font-size: .75em; overflow-wrap: anywhere; }
.ece-lecture-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem; margin-bottom: 1.6rem; font-size: .7rem; color: var(--ece-muted); }
.ece-review-button { margin-left: auto; padding: .6rem .8rem; border: 1px solid #d6c7e5; border-radius: 7px; color: var(--ece-purple); background: #fff; font: inherit; font-size: .7rem; cursor: pointer; }
.ece-review-button[aria-pressed="true"] { background: #edf5f1; border-color: #b9d6c8; color: #34745f; }
.ece-section-links { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .5rem; padding: .4rem; margin: 0 0 1.5rem; background: #f2eef6; border-radius: 9px; }
.ece-section-links a { display: flex; align-items: center; justify-content: center; gap: .4rem; padding: .75rem .35rem; color: #917b9f; font-size: .65rem; border-radius: 6px; }
.ece-section-links a span { font-size: .75rem; color: var(--ece-muted); }
.ece-section-links a[aria-selected="true"] { background: #fff; box-shadow: 0 1px 3px #36224e12; color: var(--ece-purple); }
.ece-section-links a[aria-selected="true"] span { color: var(--ece-purple); font-weight: 600; }
.ece-panel { scroll-margin-top: 1.5rem; margin-bottom: 1.5rem; }
.ece-panel > p:not(.ece-kicker) { font-size: .8rem; color: var(--ece-muted); }
.ece-panel > h2 { font-size: 1.15rem; margin: 0 0 1.2rem; }
.ece-slide-outline { border: 1px solid var(--ece-border); border-radius: 10px; overflow: hidden; }
.ece-slide-outline summary { padding: .9rem 1.1rem; background: var(--ece-paper); color: var(--ece-ink); font-size: .78rem; font-weight: 550; }
.ece-slide-outline summary span { float: right; font-size: .65rem; font-weight: 400; color: var(--ece-muted); }
.ece-slide-outline ol { margin: 0; padding: .4rem 1.1rem; list-style: none; }
.ece-slide-outline li { display: flex; align-items: baseline; gap: 1rem; padding: .65rem .2rem; border-bottom: 1px solid #f0edf3; font-size: .75rem; line-height: 1.6; }
.ece-slide-outline li:last-child { border-bottom: 0; }
.ece-slide-number { flex: 0 0 1.6rem; color: #9f8daf; font-size: .6rem; font-variant-numeric: tabular-nums; }
.ece-source-details { margin-top: 1rem; color: var(--ece-muted); font-size: .68rem; }
.ece-source-details p { margin: .6rem 0; overflow-wrap: anywhere; }
.ece-planned { padding: 1.7rem; border: 1px dashed #d2c4e0; border-radius: 12px; background: var(--ece-paper); }
.ece-planned h3 { margin: 1rem 0 .6rem; font-size: 1.05rem; }
.ece-planned p { font-size: .82rem; color: var(--ece-muted); margin: 0; max-width: 660px; }
.ece-workflow { display: flex; flex-wrap: wrap; align-items: center; gap: .7rem; margin: 1.5rem 0; font-size: .72rem; color: #9b86b0; }
.ece-workflow span:nth-child(odd) { padding: .65rem 1rem; border: 1px solid var(--ece-border); border-radius: 6px; background: #fff; color: var(--ece-purple); }
.ece-planned .ece-planned-note { font-size: .7rem; }
.ece-planned > a { display: inline-block; margin-top: 1rem; font-size: .75rem; }
.ece-storage-note { font-size: .7rem; color: #9c6125; }
.ece-pagination { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; border-top: 1px solid var(--ece-border); padding-top: 1.2rem; margin-top: 2rem; }
.ece-pagination a { display: flex; flex-direction: column; gap: .45rem; }
.ece-pagination span { color: var(--ece-muted); font-size: .65rem; }
.ece-pagination strong { font-size: .78rem; font-weight: 550; line-height: 1.5; }
.ece-pagination__next { text-align: right; }
@media (max-width: 1050px) {
  .ece-shell { grid-template-columns: 220px minmax(0, 1fr); gap: 1.5rem; }
  .ece-hero { padding: 1.3rem; gap: 1rem; }
}
@media (max-width: 800px) {
  .ece-shell { grid-template-columns: 1fr; gap: 1.5rem; }
  .ece-sidebar { position: static; max-height: none; padding: 0; }
  .ece-brand { flex-direction: row; align-items: baseline; gap: .8rem; }
  .ece-brand__code { font-size: 1.2rem; }
  .ece-progress { margin: .8rem 0; padding: .7rem 1rem; }
  .ece-navigation { border: 1px solid var(--ece-border); border-radius: 8px; padding: 0 .8rem; }
  .ece-navigation nav { max-height: 340px; overflow-y: auto; }
  .ece-navigation > summary { border: 0; padding: .75rem 0; }
  .ece-nav-group a { min-height: 42px; font-size: .75rem; }
  .ece-topbar { margin-bottom: 1.3rem; }
  .ece-topbar > span { font-size: .5rem; }
  .ece-topbar__separator { margin: 0 .3rem; }
}
@media (max-width: 550px) {
  .ece-hero { grid-template-columns: 1fr; }
  .ece-hero__diagram { display: none; }
  .ece-framework-note { flex-direction: column; gap: .5rem; }
  .ece-filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ece-search { grid-column: 1 / -1; }
  .ece-lecture-grid { grid-template-columns: 1fr; }
  .ece-section-links { gap: .1rem; }
  .ece-section-links a { flex-direction: column; gap: .2rem; }
  .ece-section-links a span { font-size: .65rem; }
  .ece-planned { padding: 1.2rem; }
  .ece-workflow { gap: .5rem; font-size: .65rem; }
  .ece-workflow span:nth-child(odd) { padding: .5rem .6rem; }
  .ece-pagination { gap: .8rem; }
  .ece-review-button { margin-left: 0; min-height: 42px; }
}