/* =========================================
   BLOG — FINAL CLEAN
   ========================================= */

/* ---------- helpers ---------- */
.sr-only{
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ---------- page shell ---------- */
main.blog{
  position: relative;
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 108px 0 40px;
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 18px;
  min-height: calc(100dvh - 140px);
  align-items: stretch;
}

main.blog::before{
  content: "";
  position: absolute;
  inset: 0 auto auto 50%;
  transform: translateX(-50%);
  width: min(760px, 82vw);
  height: 260px;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(
    circle at center,
    color-mix(in srgb, var(--color-cnaut-darker) 12%, transparent) 0%,
    transparent 72%
  );
  filter: blur(22px);
  opacity: .8;
}



/* ---------- shared card sizing ---------- */
.article-list,
.article-read{
  min-height: calc(100dvh - 160px);
  height: calc(100dvh - 160px);
}

/* =========================================
   ARTICLE LIST
   ========================================= */
.article-list{
  position: sticky;
  top: 90px;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
  border-radius: 20px;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--u-card1) 90%, transparent),
    color-mix(in srgb, var(--block-bg) 98%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 92%, transparent);
  box-shadow:
    0 16px 34px rgba(0,0,0,.10),
    inset 0 1px 0 rgba(255,255,255,.03);
}

.article-list__header{
  padding: 18px 18px 14px;
  background: color-mix(in srgb, var(--u-card3) 84%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 70%, transparent);
}

.article-list__title{
  margin: 0;
  text-align: center;
  font-size: clamp(32px, 3vw, 38px);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.article-list__title::after{
  content: "";
  display: block;
  width: 58px;
  height: 3px;
  border-radius: 999px;
  margin: 12px auto 0;
  background: var(--color-cnaut-darker);
  box-shadow: 0 0 18px color-mix(in oklab, var(--color-cnaut-darker) 46%, transparent);
}

.article-list__subtitle{
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.55;
  opacity: .78;
  text-align: center;
}

/* mobile accordion button hidden on desktop */
.article-list__mobile-toggle{
  display: none;
}

.article-list__current{
  display: none;
}

.article-list__panel{
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-height: 0;
}

.article-list__tools{
  display: grid;
  grid-template-columns: 1fr 126px;
  gap: 10px;
  padding: 14px 14px 12px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 60%, transparent);
}

.article-list__search,
.article-list__select{
  height: 42px;
  width: 100%;
  box-sizing: border-box;
  border-radius: 12px;
  padding: 0 12px;
  outline: none;
  color: var(--text-color);
  border: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 88%, transparent);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--u-card1) 82%, transparent),
    color-mix(in srgb, var(--block-bg) 96%, transparent)
  );
}

.article-list__search::placeholder{
  opacity: .72;
}

.article-list__search:focus,
.article-list__select:focus{
  border-color: var(--color-cnaut-light);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-cnaut-shadow) 22%, transparent);
}

.article-list__nav{
  min-height: 0;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  background: transparent;
}

.article-list__items{
  list-style: none;
  margin: 0;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.article-link{
  position: relative;
  width: 100%;
  display: grid;
  gap: 6px;
  text-align: left;
  padding: 13px;
  border-radius: 14px;
  cursor: pointer;
  color: var(--text-color);
  border: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 92%, transparent);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--u-card1) 84%, transparent),
    color-mix(in srgb, var(--block-bg2) 98%, transparent)
  );
  transition: transform .14s ease, border-color .18s ease, box-shadow .18s ease;
}

.article-link:hover{
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--color-cnaut-light) 55%, transparent);
  box-shadow: 0 10px 24px rgba(0,0,0,.08);
}

.article-link.is-active{
  border-color: color-mix(in srgb, var(--color-cnaut-light) 72%, transparent);
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--color-cnaut-shadow) 18%, transparent),
    0 12px 24px rgba(0,0,0,.08);
}

.article-link.is-active::before{
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: var(--color-cnaut-darker);
}

.article-link__title{
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .01em;
}

.article-link__meta{
  font-size: 12px;
  opacity: .7;
}

.article-list__footer{
  padding: 10px 16px;
  border-top: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 70%, transparent);
  background: color-mix(in srgb, var(--u-card2) 82%, transparent);
}

.article-list__hint{
  margin: 0;
  font-size: 12px;
  opacity: .65;
  text-align: center;
}

/* =========================================
   ARTICLE READ
   ========================================= */
.article-read{
  position: relative;
  min-width: 0;
  overflow: auto;
  border-radius: 20px;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--u-card1) 90%, transparent),
    color-mix(in srgb, var(--block-bg) 98%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 92%, transparent);
  box-shadow:
    0 16px 34px rgba(0,0,0,.10),
    inset 0 1px 0 rgba(255,255,255,.03);
}

.article-read::before{
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 72px;
  border-top-left-radius: inherit;
  border-top-right-radius: inherit;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-cnaut-shadow2) 12%, transparent),
    transparent
  );
  pointer-events: none;
}

.article-read__loading{
  height: 320px;
  margin: 16px;
  border-radius: 12px;
}

.article-read__empty{
  padding: 22px 18px;
}

/* =========================================
   ARTICLE CONTENT
   ========================================= */
.blog-article{
  min-height: 100%;
  box-sizing: border-box;
  padding: 22px 22px 26px;
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity .22s ease,
    transform .22s ease,
    filter .22s ease;
}

.blog-article.is-transitioning-out{
  opacity: 0;
  transform: translateY(8px);
  filter: blur(2px);
}

.blog-article.is-transitioning-stage1{
  opacity: 0;
  transform: translateY(16px);
  filter: blur(3px);
}

.blog-article.is-transitioning-stage2{
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.blog-article.is-transitioning-stage2.is-ready{
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.blog-article__header{
  padding-bottom: 16px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 70%, transparent);
}

.blog-article__kicker{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  opacity: .82;
}

.blog-article__tag{
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--color-cnaut-light) 65%, transparent);
  background: color-mix(in srgb, var(--u-card2) 86%, transparent);
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.blog-article__dot{
  opacity: .6;
}

.blog-article__title{
  margin: 12px 0 0;
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.blog-article__lead{
  margin: 12px 0 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.75;
  opacity: .85;
}

.blog-article__content{
  padding-top: 18px;
  font-size: 14px;
  line-height: 1.8;
}

.blog-article__content h3{
  margin: 20px 0 8px;
  font-size: 18px;
  font-weight: 700;
}

.blog-article__content p{
  margin: 0 0 12px;
  max-width: 76ch;
  opacity: .92;
}

.blog-article__content ul,
.blog-article__content ol{
  margin: 0 0 14px 18px;
  padding: 0;
}

.blog-article__content li{
  margin: 6px 0;
  max-width: 76ch;
  opacity: .92;
}

.blog-article__content strong{
  font-weight: 700;
}

.blog-article__divider{
  border: 0;
  height: 1px;
  margin: 18px 0;
  background: color-mix(in srgb, var(--color-cnaut-shadow2) 70%, transparent);
}

.blog-article__callout{
  margin: 14px 0 16px;
  padding: 13px 14px;
  border-radius: 14px;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--u-card1) 82%, transparent),
    color-mix(in srgb, var(--block-bg2) 98%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 88%, transparent);
}

.blog-article__figure{
  margin: 16px 0 18px;
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--u-card1) 82%, transparent),
    color-mix(in srgb, var(--block-bg2) 98%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 88%, transparent);
}

.blog-article__figure img{
  display: block;
  width: 100%;
  height: auto;
}

.blog-article__figure figcaption{
  padding: 10px 12px;
  font-size: 12px;
  opacity: .72;
}

.blog-article__footer{
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 70%, transparent);
}

.blog-article__nav{
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.blog-article__disclaimer{
  margin: 12px 0 0;
  font-size: 12px;
  opacity: .65;
}

/* =========================================
   BUTTONS
   ========================================= */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.10);
  cursor: pointer;
  text-decoration: none;
  user-select: none;
  font-weight: 700;
  letter-spacing: .2px;
}

.btn-primary{
  background: var(--color-cnaut-accent);
  color: var(--text-color-negative);
  border-color: var(--color-cnaut-shadow);
}

.btn-primary:hover{
  filter: brightness(1.05);
}

.btn-secondary{
  background: var(--block-bg2);
  color: var(--text-color);
  border-color: var(--color-cnaut-shadow3);
}

.btn-secondary:hover{
  border-color: var(--color-cnaut-shadow);
}

/* =========================================
   SCROLLBARS
   ========================================= */
.article-list__nav::-webkit-scrollbar,
.article-read::-webkit-scrollbar{
  width: 10px;
}

.article-list__nav::-webkit-scrollbar-thumb,
.article-read::-webkit-scrollbar-thumb{
  background: var(--color-cnaut-shadow3);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}

.article-list__nav::-webkit-scrollbar-thumb:hover,
.article-read::-webkit-scrollbar-thumb:hover{
  background: var(--color-cnaut-shadow);
  border: 2px solid transparent;
  background-clip: content-box;
}

/* =========================================
   MOBILE / TABLET
   ========================================= */
@media (max-width: 800px){
  main.blog{
    grid-template-columns: 1fr;
    gap: 14px;
    padding-top: 70px;
    padding-bottom: 100px;
  }

  .article-list,
  .article-read{
    min-height: auto;
    height: auto;
  }

  .article-list{
    order: 1;
    position: relative;
    top: auto;
    display: block;
    overflow: hidden;
  }

  .article-read{
    order: 2;
    overflow: visible;
  }

  .article-list__header{
    padding: 16px 16px 12px;
  }

  .article-list__title{
    margin-bottom: 8px;
  }

  .article-list__subtitle{
    margin-bottom: 10px;
  }

  .article-list__mobile-toggle{
    width: 100%;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 4px;
    padding: 0 14px;
    border-radius: 12px;
    border: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 88%, transparent);
    background: linear-gradient(
      180deg,
      color-mix(in srgb, var(--u-card1) 82%, transparent),
      color-mix(in srgb, var(--block-bg) 96%, transparent)
    );
    color: var(--text-color);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
  }

  .article-list__mobile-caret{
    width: 14px;
    height: 14px;
    display: inline-block;
    -webkit-mask: url("../images/svg/sort.svg") no-repeat center / contain;
    mask: url("../images/svg/sort.svg") no-repeat center / contain;
    background-color: var(--text-color);
    transition: transform .22s ease, background-color .18s ease;
    flex: 0 0 auto;
  }

  .article-list.is-open .article-list__mobile-caret{
    transform: rotate(180deg);
    background-color: var(--color-cnaut-darker);
  }

  .article-list__current{
    display: block;
    margin: 10px 0 0;
    padding: 10px 0 12px;
    font-size: 12px;
    line-height: 1.45;
    opacity: .72;
    border-bottom: 1px solid color-mix(in srgb, var(--color-cnaut-shadow2) 70%, transparent);
  }

  .article-list__panel{
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    margin-top: 0;
    transition:
      grid-template-rows .28s ease,
      margin-top .28s ease,
      opacity .24s ease;
  }

  .article-list.is-open .article-list__panel{
    grid-template-rows: 1fr;
    opacity: 1;
    margin-top: 10px;
  }

  .article-list__panel > *{
    min-height: 0;
  }

  .article-list:not(.is-open) .article-list__tools,
  .article-list:not(.is-open) .article-list__nav,
  .article-list:not(.is-open) .article-list__footer{
    overflow: hidden;
  }

  .article-list__tools{
    grid-template-columns: 2fr 1fr;
    gap: 10px;
    padding: 2px 0 12px;
    margin: 0 14px;
    border-bottom: 0;
  }

  .article-list__nav{
    max-height: 300px;
  }

  .article-list__items{
    padding: 12px 14px 0;
  }

  .article-list__footer{
    display: none;
  }

  .blog-article{
    padding: 18px 16px 22px;
  }

  .blog-article__title{
    font-size: 24px;
  }
}

@media (max-width: 560px){
  main.blog{
    width: min(100%, calc(100% - 24px));
  }

  .article-list,
  .article-read{
    border-radius: 18px;
  }

  .article-list__header{
    padding: 14px 14px 12px;
  }

  .article-list__title{
    font-size: 32px;
  }

  .blog-article__title{
    font-size: 26px;
  }

  .blog-article__nav{
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .blog-article__nav .btn{
    width: 100%;
  }
}


@media (min-width: 801px){
  .article-list,
  .article-read{
    position: sticky;
    top: 90px;
  }

  .article-read{
    overflow: auto;
  }
}

/* ===== desktop sticky sync ===== */
@media (min-width: 801px){
  .article-list,
  .article-read{
    position: sticky;
    top: 90px;
  }

  .article-read{
    overflow: auto;
  }
}

/* ===== mobile accordion real collapse ===== */
@media (max-width: 800px){
  .article-list{
    height: auto;
    min-height: 0;
  }

  .article-list__panel{
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition:
      max-height .32s ease,
      opacity .24s ease,
      margin-top .24s ease;
  }

  .article-list.is-open .article-list__panel{
    max-height: 520px;
    opacity: 1;
    margin-top: 10px;
  }

  .article-list__tools{
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 10px;
    padding: 2px 0 12px;
    margin: 0 14px;
  }

  .article-list__nav{
    max-height: 300px;
    overflow: auto;
  }
}

main.blog{
  align-items: start;
}