/* ==========================================================
   Differential Diagnosis — Blog page content
   Scope: blog content only. Header and footer are not included.
   All selectors are prefixed with dd-blog to prevent conflicts.
   ========================================================== */

.dd-blog-page {
  --dd-blog-ink: var(--ink, var(--color-ink));
  --dd-blog-muted: var(--muted, var(--color-muted));
  --dd-blog-blue: var(--blue, var(--color-blue));
  --dd-blog-blue-deep: var(--blue-deep, var(--color-blue-deep));
  --dd-blog-red: var(--color-red);
  --dd-blog-border: var(--alpha-navy-10);
  --dd-blog-shadow: 0 11px 30px var(--alpha-slate-15);
  --dd-blog-gutter: clamp(20px, 3.35vw, 52px);
  min-width: 0;
  overflow: hidden;
  color: var(--dd-blog-ink);
  background: var(--color-surface);
  font-family: "Poppins", "Segoe UI", Arial, sans-serif;
}

.dd-blog-page *,
.dd-blog-page *::before,
.dd-blog-page *::after {
  box-sizing: border-box;
}

.dd-blog-page a {
  color: inherit;
  text-decoration: none;
}

.dd-blog-page img {
  display: block;
  max-width: 100%;
}

.dd-blog-container {
  width: min(calc(100% - (var(--dd-blog-gutter) * 2)), 1368px);
  margin-inline: auto;
}

/* Banner */
.dd-blog-hero {
  position: relative;
  min-height: clamp(300px, 22vw, 350px);
  overflow: hidden;
  background-color: var(--color-surface);
  background-image: url("../images/blog-banner-bg.png");
  background-repeat: no-repeat;
  background-position: center right;
  background-size: cover;
}

.dd-blog-hero__inner {
  position: relative;
  z-index: 1;
  min-height: inherit;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-block: clamp(42px, 5vw, 76px) clamp(70px, 7vw, 105px);
}

.dd-blog-kicker {
  width: max-content;
  max-width: 100%;
  min-height: 36px;
  margin: 0 0 clamp(18px, 2vw, 26px);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 13px 8px 10px;
  border: 1px solid var(--alpha-navy-10);
  border-radius: 6px;
  background: var(--alpha-white-90);
  box-shadow: 0 5px 13px var(--alpha-navy-10);
  color: var(--color-slate);
  font-size: clamp(11px, 0.92vw, 14px);
  font-weight: 500;
  line-height: 1.3;
  backdrop-filter: blur(3px);
}

.dd-blog-kicker i {
  display: grid;
  place-items: center;
  color: var(--dd-blog-red);
  font-size: 17px;
  line-height: 1;
}

.dd-blog-hero h1 {
  max-width: 620px;
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(42px, 4.1vw, 64px);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

.dd-blog-hero h1 strong {
  color: var(--color-blue-deep);
  font-weight: inherit;
}

.dd-blog-title-line {
  width: clamp(54px, 4.5vw, 72px);
  height: 3px;
  margin-top: clamp(14px, 1.5vw, 20px);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-red), var(--color-red-deep));
}

.dd-blog-hero__copy {
  width: min(100%, 480px);
  margin: clamp(18px, 1.7vw, 24px) 0 0;
  color: var(--color-slate);
  font-size: clamp(12px, 1vw, 15px);
  font-weight: 400;
  line-height: 1.75;
}

/* Main content */
.dd-blog-content {
  position: relative;
  padding-bottom: clamp(70px, 7vw, 112px);
  background:
    radial-gradient(circle at 85% 15%, var(--alpha-surface-blue-60), transparent 26%),
    linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-alt) 100%);
}

.dd-blog-content__inner {
  position: relative;
  z-index: 2;
  margin-top: clamp(-54px, -3.7vw, -38px);
}

/* Featured article */
.dd-blog-featured {
  position: relative;
  display: grid;
  grid-template-columns: minmax(300px, 0.95fr) minmax(380px, 1.28fr) minmax(215px, 0.62fr);
  min-height: 252px;
  padding: 10px;
  overflow: hidden;
  border: 1px solid var(--dd-blog-border);
  border-radius: 12px;
  background: var(--alpha-white-98);
  box-shadow: var(--dd-blog-shadow);
}

.dd-blog-featured__media {
  min-width: 0;
  height: 230px;
  align-self: center;
  overflow: hidden;
  border-radius: 9px;
  background: var(--color-border-strong);
}

.dd-blog-featured__media img {
  width: 100%;
  height: 230px;
  min-height: 0;
  object-fit: cover;
  object-position: center;
  transition: transform 0.45s ease;
}

.dd-blog-featured:hover .dd-blog-featured__media img,
.dd-blog-featured:focus-within .dd-blog-featured__media img {
  transform: scale(1.035);
}

.dd-blog-featured__body {
  min-width: 0;
  align-self: center;
  padding: clamp(20px, 2.35vw, 34px) clamp(22px, 2.5vw, 38px);
}

.dd-blog-featured__label {
  display: inline-flex;
  align-items: center;
  min-height: 23px;
  margin-bottom: 14px;
  padding: 4px 11px;
  border-radius: 3px;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-red), var(--color-red-deep));
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}

.dd-blog-featured__body h2 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(20px, 1.72vw, 27px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.3;
}

.dd-blog-featured__body h2 a,
.dd-blog-card h2 a {
  transition: color 0.18s ease;
}

.dd-blog-featured__body h2 a:hover,
.dd-blog-featured__body h2 a:focus-visible,
.dd-blog-card h2 a:hover,
.dd-blog-card h2 a:focus-visible {
  color: var(--dd-blog-blue-deep);
}

.dd-blog-featured__body > p {
  margin: 13px 0 17px;
  color: var(--color-muted);
  font-size: clamp(10px, 0.78vw, 12px);
  line-height: 1.62;
}

.dd-blog-featured__button {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: 999px;
  color: var(--color-white) !important;
  background: linear-gradient(135deg, var(--color-red), var(--color-red-deep));
  box-shadow: 0 12px 24px var(--alpha-red-20), inset 0 1px 0 var(--alpha-white-25);
  font-size: 11px;
  font-weight: 500;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.dd-blog-featured__button i,
.dd-blog-card__link i {
  display: inline-flex;
  transition: transform 0.18s ease;
}

.dd-blog-featured__button:hover,
.dd-blog-featured__button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px var(--alpha-red-25), inset 0 1px 0 var(--alpha-white-25);
}

.dd-blog-featured__button:hover i,
.dd-blog-featured__button:focus-visible i,
.dd-blog-card__link:hover i,
.dd-blog-card__link:focus-visible i {
  transform: translateX(4px);
}

.dd-blog-featured__meta {
  position: relative;
  min-width: 0;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 25px;
  margin-block: 38px;
  padding: 16px clamp(20px, 2.25vw, 34px);
  overflow: hidden;
  border-left: 1px solid var(--alpha-navy-12);
}

.dd-blog-featured__meta p {
  position: relative;
  z-index: 2;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-muted);
  font-size: clamp(10px, 0.78vw, 12px);
  font-weight: 500;
  line-height: 1.45;
}

.dd-blog-featured__meta p i {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--color-facebook);
  background: var(--color-surface-blue);
  font-size: 14px;
}

.dd-blog-featured__watermark {
  position: absolute;
  right: 12px;
  bottom: -23px;
  z-index: 1;
  color: var(--color-border-strong);
  opacity: 0.10;
  font-size: clamp(110px, 10vw, 165px);
  line-height: 1;
  transform: rotate(-6deg);
}

/* Article cards */
.dd-blog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 1.7vw, 25px);
  margin-top: clamp(22px, 2.2vw, 32px);
}

.dd-blog-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--dd-blog-border);
  border-radius: 12px;
  background: var(--color-white);
  box-shadow: 0 9px 24px var(--alpha-navy-10);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.dd-blog-card:hover,
.dd-blog-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 15px 34px var(--alpha-slate-15);
}

.dd-blog-card__media {
  display: block;
  height: 220px;
  overflow: hidden;
  background: var(--color-border);
}

.dd-blog-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.45s ease;
}

.dd-blog-card:hover .dd-blog-card__media img,
.dd-blog-card:focus-within .dd-blog-card__media img {
  transform: scale(1.04);
}

.dd-blog-card__body {
  min-height: clamp(260px, 21vw, 322px);
  display: flex;
  flex-direction: column;
  padding: clamp(18px, 1.75vw, 25px) clamp(18px, 1.8vw, 26px) clamp(20px, 1.9vw, 28px);
}

.dd-blog-card__date {
  margin: 0 0 13px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--color-muted);
  font-size: clamp(9px, 0.72vw, 11px);
  font-weight: 500;
  line-height: 1.35;
}

.dd-blog-card__date i {
  color: var(--color-facebook);
  font-size: 13px;
}

.dd-blog-card h2 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(16px, 1.28vw, 20px);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.34;
}

.dd-blog-card__excerpt {
  margin: 12px 0 17px;
  color: var(--color-muted);
  font-size: clamp(10px, 0.78vw, 12px);
  line-height: 1.52;
}

.dd-blog-card__link {
  width: max-content;
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--dd-blog-red) !important;
  font-size: clamp(11px, 0.82vw, 13px);
  font-weight: 600;
}

.dd-blog-empty {
  padding: clamp(32px, 3.2vw, 48px) 0;
  color: var(--dd-blog-muted);
  font-size: clamp(13px, 1vw, 15px);
  text-align: center;
}

/* Search results */
.dd-blog-search-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: clamp(22px, 2.2vw, 32px);
  border: 1px solid var(--dd-blog-border);
  border-radius: 12px;
  background: var(--alpha-white-98);
  box-shadow: var(--dd-blog-shadow);
}

.dd-blog-search-panel > div > span {
  color: var(--dd-blog-red);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.dd-blog-search-panel h2 {
  margin: 5px 0 0;
  color: var(--color-ink);
  font-size: clamp(20px, 1.7vw, 27px);
  line-height: 1.25;
}

.dd-blog-search-form {
  width: min(100%, 490px);
  min-height: 50px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  padding: 5px;
  border: 1px solid var(--alpha-navy-15);
  border-radius: 10px;
  background: var(--color-surface);
}

.dd-blog-search-form input {
  min-width: 0;
  padding: 8px 14px;
  border: 0;
  outline: 0;
  color: var(--dd-blog-ink);
  background: transparent;
  font: inherit;
  font-size: 13px;
}

.dd-blog-search-form:focus-within {
  border-color: var(--alpha-blue-50);
  box-shadow: 0 0 0 3px var(--alpha-blue-10);
}

.dd-blog-search-form button {
  min-width: 112px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 17px;
  border: 1px solid var(--color-red);
  border-radius: 7px;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-red), var(--color-red-deep));
  box-shadow: 0 8px 18px var(--alpha-red-20), inset 0 1px 0 var(--alpha-white-20);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: filter .18s ease, box-shadow .18s ease;
}

.dd-blog-search-form button:hover,
.dd-blog-search-form button:focus-visible {
  filter: brightness(1.04);
  box-shadow: 0 12px 24px var(--alpha-red-25), inset 0 1px 0 var(--alpha-white-25);
}

.dd-blog-search-grid {
  margin-top: clamp(26px, 2.5vw, 38px);
}

.dd-blog-search-empty {
  max-width: 670px;
  margin: clamp(28px, 3vw, 44px) auto 0;
  padding: clamp(34px, 4vw, 58px);
  border: 1px solid var(--dd-blog-border);
  border-radius: 14px;
  background: var(--color-white);
  box-shadow: 0 10px 28px var(--alpha-navy-08);
  text-align: center;
}

.dd-blog-search-empty > i {
  width: 58px;
  height: 58px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--dd-blog-blue-deep);
  background: var(--color-surface-blue);
  font-size: 23px;
}

.dd-blog-search-empty h2 { margin: 0; color: var(--color-ink); font-size: clamp(22px, 2vw, 30px); }
.dd-blog-search-empty p { margin: 12px auto 20px; color: var(--dd-blog-muted); font-size: 13px; line-height: 1.7; }
.dd-blog-search-empty a { display: inline-flex; align-items: center; gap: 8px; color: var(--dd-blog-blue-deep); font-size: 13px; font-weight: 700; }

/* Pagination */
.dd-blog-pagination {
  display: flex;
  justify-content: center;
  margin-top: clamp(36px, 3.6vw, 52px);
}

.dd-blog-pagination ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.dd-blog-pagination .page-numbers,
.dd-blog-pagination__arrow {
  min-width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  border: 1px solid var(--dd-blog-border);
  border-radius: 8px;
  background: var(--color-white);
  color: var(--dd-blog-ink);
  font-size: 13px;
  font-weight: 600;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.dd-blog-pagination .page-numbers.dots {
  border-color: transparent;
  background: transparent;
  color: var(--dd-blog-muted);
}

.dd-blog-pagination a.page-numbers:hover,
.dd-blog-pagination a.page-numbers:focus-visible,
.dd-blog-pagination__arrow:not(.is-disabled):hover,
.dd-blog-pagination__arrow:not(.is-disabled):focus-visible {
  border-color: var(--dd-blog-blue);
  color: var(--dd-blog-blue-deep);
}

.dd-blog-pagination .page-numbers.current {
  border-color: var(--dd-blog-red);
  background: var(--dd-blog-red);
  color: var(--color-white);
}

.dd-blog-pagination__arrow.is-disabled {
  opacity: 0.35;
  cursor: default;
}

@media (max-width: 680px) {
  .dd-blog-pagination .page-numbers,
  .dd-blog-pagination__arrow {
    min-width: 36px;
    height: 36px;
    font-size: 12px;
  }
}

/* Focus states */
.dd-blog-page a:focus-visible {
  outline: 3px solid var(--alpha-blue-30);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Large displays */
@media (min-width: 1921px) {
  .dd-blog-container {
    width: min(calc(100% - 120px), 1536px);
  }

  .dd-blog-hero {
    min-height: 390px;
  }

  .dd-blog-card__media {
    height: 220px;
  }
}

/* Laptops and smaller desktops */
@media (max-width: 1180px) {
  .dd-blog-featured {
    grid-template-columns: minmax(285px, 0.9fr) minmax(370px, 1.2fr) minmax(190px, 0.55fr);
  }

  .dd-blog-featured__body {
    padding-inline: 24px;
  }

  .dd-blog-featured__meta {
    padding-inline: 18px;
  }
}

/* Tablet */
@media (max-width: 960px) {
  .dd-blog-hero {
    min-height: 320px;
    background-position: 57% center;
  }

  .dd-blog-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--alpha-white-98) 0%, var(--alpha-white-90) 42%, var(--alpha-white-10) 76%);
  }

  .dd-blog-hero__inner {
    z-index: 2;
  }

  .dd-blog-featured {
    grid-template-columns: minmax(275px, 0.9fr) minmax(0, 1.35fr);
  }

  .dd-blog-featured__meta {
    grid-column: 1 / -1;
    min-height: 80px;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 38px;
    margin: 0;
    padding: 14px 22px;
    border-top: 1px solid var(--alpha-navy-10);
    border-left: 0;
  }

  .dd-blog-featured__watermark {
    right: 22px;
    bottom: -38px;
  }

  .dd-blog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dd-blog-card__media {
    height: 220px;
  }

  .dd-blog-card__body {
    min-height: 295px;
  }

  .dd-blog-search-panel {
    align-items: stretch;
    flex-direction: column;
    gap: 18px;
  }

  .dd-blog-search-form { width: 100%; }
  .dd-blog-search-form button { min-width: 48px; padding-inline: 14px; }
  .dd-blog-search-form button span { display: none; }
}

/* Mobile */
@media (max-width: 680px) {
  .dd-blog-page {
    --dd-blog-gutter: 18px;
  }

  .dd-blog-hero {
    min-height: 365px;
    background-position: 64% center;
  }

  .dd-blog-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--alpha-white-98) 0%, var(--alpha-white-95) 58%, var(--alpha-white-60) 100%);
  }

  .dd-blog-hero__inner {
    z-index: 2;
    justify-content: flex-start;
    padding-top: 46px;
    padding-bottom: 112px;
  }

  .dd-blog-kicker {
    margin-bottom: 20px;
    font-size: 10px;
  }

  .dd-blog-hero h1 {
    max-width: 330px;
    font-size: clamp(38px, 12vw, 52px);
  }

  .dd-blog-hero__copy {
    max-width: 350px;
    font-size: 12px;
    line-height: 1.65;
  }

  .dd-blog-content__inner {
    margin-top: -72px;
  }

  .dd-blog-featured {
    display: block;
    padding: 8px;
  }

  .dd-blog-featured__media {
    display: block;
    height: 220px;
  }

  .dd-blog-featured__media img {
    height: 100%;
    min-height: 0;
  }

  .dd-blog-featured__body {
    padding: 24px 16px 21px;
  }

  .dd-blog-featured__body h2 {
    font-size: 21px;
  }

  .dd-blog-featured__body > p {
    font-size: 11px;
  }

  .dd-blog-featured__meta {
    min-height: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin: 0;
    padding: 15px 14px 17px;
  }

  .dd-blog-featured__meta p {
    gap: 8px;
    font-size: 10px;
  }

  .dd-blog-featured__meta p i {
    width: 28px;
    height: 28px;
    font-size: 12px;
  }

  .dd-blog-featured__watermark {
    display: none;
  }

  .dd-blog-grid {
    grid-template-columns: 1fr;
    gap: 18px;
    margin-top: 20px;
  }

  .dd-blog-card__media {
    height: 220px;
  }

  .dd-blog-card__body {
    min-height: 0;
    padding: 20px 18px 23px;
  }

  .dd-blog-card h2 {
    font-size: 19px;
  }

  .dd-blog-card__excerpt {
    font-size: 11px;
  }

  .dd-blog-card__link {
    margin-top: 5px;
  }
}

@media (max-width: 390px) {
  .dd-blog-featured__media {
    height: 220px;
  }

  .dd-blog-featured__meta {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dd-blog-featured__media img,
  .dd-blog-card,
  .dd-blog-card__media img,
  .dd-blog-featured__button,
  .dd-blog-featured__button i,
  .dd-blog-card__link i,
  .dd-blog-featured__body h2 a,
  .dd-blog-card h2 a {
    transition: none !important;
  }

  .dd-blog-featured:hover .dd-blog-featured__media img,
  .dd-blog-featured:focus-within .dd-blog-featured__media img,
  .dd-blog-card:hover,
  .dd-blog-card:focus-within,
  .dd-blog-card:hover .dd-blog-card__media img,
  .dd-blog-card:focus-within .dd-blog-card__media img,
  .dd-blog-featured__button:hover,
  .dd-blog-featured__button:focus-visible {
    transform: none !important;
  }
}