* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  color: #1f1f1f;
  background: #f7f7f7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* ── Header ───────────────────────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100px;
  padding: 0 34px;
  background: #fff;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.16);
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-svg {
  height: 48px;
  width: auto;
  display: block;
}

/* ── Header search ────────────────────────────────────────────────────────── */
.header-search {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 420px;
  margin-left: auto;
}

.header-search input {
  width: 100%;
  height: 56px;
  border: none;
  background: #ecf1ff;
  border-radius: 17px;
  padding: 0 20px 0 56px;
  font-size: 22px;
  font-family: Arial, sans-serif;
  color: #1f1f1f;
  outline: none;
}

.header-search input::placeholder {
  color: #979797;
}

.header-search-icon {
  position: absolute;
  left: 20px;
  width: 22px;
  height: 22px;
  fill: #979797;
  pointer-events: none;
}

/* ── Bell ─────────────────────────────────────────────────────────────────── */
.bell-wrapper {
  position: relative;
  flex-shrink: 0;
}

.header-bell {
  width: 32px;
  height: auto;
  cursor: pointer;
  display: block;
}

.bell-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 14px);
  right: 0;
  width: 300px;
  background: #fff;
  border: 1px solid #d0d0d0;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  padding: 20px;
  z-index: 200;
}

.bell-dropdown.open {
  display: block;
}

.bell-dropdown-title {
  font-size: 16px;
  font-weight: 600;
  color: #2055ff;
  margin-bottom: 14px;
}

.bell-signup-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bell-email-input {
  width: 100%;
  height: 42px;
  border: 1px solid #707070;
  border-radius: 10px;
  padding: 0 14px;
  font-size: 15px;
  font-family: Arial, sans-serif;
  color: #1f1f1f;
  outline: none;
}

.bell-email-input::placeholder {
  color: #979797;
}

.bell-submit-btn {
  width: 100%;
  height: 42px;
  background: #2055ff;
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: background 0.15s;
}

.bell-submit-btn:hover {
  background: #1844dd;
}

.bell-success {
  display: none;
  font-size: 15px;
  color: #2055ff;
  text-align: center;
  padding: 6px 0;
}

/* ── Index layout ─────────────────────────────────────────────────────────── */
.blog-main {
  max-width: 1800px;
  margin: 0 auto;
  padding: 60px 60px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.intro-eyebrow {
  font-size: 50px;
  font-weight: 700;
  color: #1f1f1f;
  letter-spacing: 0.01em;
  line-height: 1.05;
}

.intro-sub {
  font-size: 22px;
  letter-spacing: 0.03em;
  color: #1f1f1f;
  margin-top: 24px;
  line-height: 1.35;
  max-width: 760px;
}

.section-heading {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #1f1f1f;
  margin: 30px 0 24px;
}

.catalog-col .section-heading {
  margin-top: 0;
}

/* ── Card ─────────────────────────────────────────────────────────────────── */
.card {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 18px;
  padding: 28px 32px;
  text-decoration: none;
  display: block;
  transition: box-shadow 0.18s, transform 0.18s;
}

.card:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.card-tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #2055ff;
  background: #ecf1ff;
  padding: 4px 12px;
  border-radius: 8px;
  margin-bottom: 14px;
}

.card-tag.announcement {
  background: #ecf1ff;
  color: #2055ff;
}

.card-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
}

.card-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #1f1f1f;
  line-height: 1.2;
  flex: 0 1 auto;
  min-width: 0;
  max-width: calc(100% - 160px);
  overflow-wrap: break-word;
}

.card-date {
  font-size: 16px;
  font-weight: 700;
  color: #1f1f1f;
  letter-spacing: 0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

.card-divider {
  border: none;
  border-top: 1px solid #1f1f1f;
  margin: 8px 0 12px;
  width: 100%;
}

.card-excerpt {
  font-size: 16px;
  line-height: 1.45;
  color: #1f1f1f;
  margin-top: 3px;
}

.card-excerpt .read-more {
  color: #2055ff;
  text-decoration: none;
}

.card-excerpt .read-more:hover {
  text-decoration: underline;
}

/* ── Featured (latest) card ───────────────────────────────────────────────── */
.featured-card {
  padding: 22px 28px 24px;
}

.featured-card .card-title {
  font-size: 30px;
  margin-top: 6px;
}

.featured-subtitle {
  font-size: 18px;
  font-style: italic;
  color: #1f1f1f;
  margin: 2px 0 0;
  letter-spacing: 0.01em;
}

.featured-subtitle sup {
  font-size: 13px;
  color: #2055ff;
}

.featured-hero {
  display: block;
  width: 100%;
  max-height: 240px;
  height: auto;
  object-fit: contain;
  margin: 4px 0 10px;
}

/* ── Catalog list ─────────────────────────────────────────────────────────── */
.catalog-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Footer ───────────────────────────────────────────────────────────────── */
.footer {
  padding: 30px 34px;
  font-size: 21px;
  letter-spacing: 0.02em;
  color: #1f1f1f;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 -1px 6px rgba(0,0,0,0.08);
}

.footer-link {
  color: #1f1f1f;
  text-decoration: none;
  font-size: 18px;
  padding: 0 15px;
  letter-spacing: 0.02em;
}

.footer-link:hover {
  color: #2055ff;
}

/* ── Article-style post (left-aligned, body paragraphs) ──────────────────── */
.article-post {
  padding: 60px 90px 80px;
}

.article-head {
  max-width: 720px;
  margin: 0 auto;
}

.article-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #1f1f1f;
  line-height: 1.2;
}

.article-subtitle {
  font-size: 18px;
  font-style: italic;
  color: #1f1f1f;
  margin-top: 4px;
  letter-spacing: 0.01em;
}

.article-subtitle sup {
  font-size: 12px;
  color: #2055ff;
}

.article-hero {
  display: block;
  width: 100%;
  max-height: 260px;
  height: auto;
  object-fit: contain;
  margin: 28px 0 24px;
}

.article-byline {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 16px;
  font-weight: 700;
  color: #1f1f1f;
  letter-spacing: 0.01em;
}

.article-divider {
  border: none;
  border-top: 1px solid #1f1f1f;
  margin: 10px 0 28px;
}

.article-body {
  font-family: Cambria;
  word-spacing: 0.1em;
  max-width: 720px;
  margin: 0 auto;
  font-size: 18px;
  line-height: 1.6;
  color: #1f1f1f;
  text-align: justify;
}

.article-body p {
  margin-bottom: 1.1em;
}

.article-body sup {
  font-size: 10px;
  color: #2055ff;
}

.article-body a {
  color: #2055ff;
}

.article-citations {
  max-width: 720px;
  margin: 48px auto 0;
  padding-top: 20px;
  border-top: 1px solid #1f1f1f;
}

.citations-heading {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #1f1f1f;
  margin-bottom: 12px;
}

.citations-list {
  list-style: decimal inside;
  padding-left: 0;
  font-size: 14px;
  line-height: 1.6;
  color: #1f1f1f;
}

.citations-list li {
  margin-bottom: 6px;
}

.article-disclaimer {
  max-width: 720px;
  margin: 40px auto 0;
  font-size: 12px;
  font-style: italic;
  color: #707070;
  text-align: center;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

/* ── Post template ────────────────────────────────────────────────────────── */
.post-shell {
  background: #f7f7f7;
  min-height: calc(100vh - 100px - 90px);
  padding: 0;
}

.post-container {
  background: #fff;
  max-width: 1041px;
  margin: 0 auto;
  padding: 60px 90px 80px;
  min-height: 800px;
}

.post-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.post-title {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #1f1f1f;
  line-height: 1.15;
  margin-bottom: 18px;
}

.post-tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: #2055ff;
  background: #ecf1ff;
  padding: 5px 14px;
  border-radius: 8px;
}

.post-tag.announcement {
  color: #2055ff;
  background: #ecf1ff;
}

.post-feature {
  margin: 30px auto 12px;
  display: flex;
  justify-content: center;
}

.post-feature-placeholder {
  width: 150px;
  height: 150px;
  background: #ff6a20;
  color: #fff;
  font-size: 110px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Arial, sans-serif;
  line-height: 1;
}

.post-date {
  text-align: right;
  font-size: 15px;
  font-weight: 700;
  color: #1f1f1f;
  letter-spacing: 0.01em;
  margin-top: 14px;
}

.post-divider {
  border: none;
  border-top: 1px solid #1f1f1f;
  margin: 8px 0 28px;
}

.post-body {
  max-width: 720px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.55;
  color: #1f1f1f;
}

.post-body p {
  margin-bottom: 1.1em;
}

.post-body a {
  color: #2055ff;
}

.post-video {
  margin: 36px auto 0;
  width: 100%;
  max-width: 600px;
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
  border-radius: 4px;
}

.post-video iframe {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}

.post-video-play {
  background: none;
  border: none;
  cursor: pointer;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s;
}

.post-video-play:hover {
  transform: scale(1.08);
}

.post-cta {
  max-width: 720px;
  margin: 60px auto 0;
  text-align: center;
}

.post-cta-line {
  font-size: 22px;
  letter-spacing: 0.01em;
  color: #1f1f1f;
}

.post-cta-link {
  color: #2055ff;
  text-decoration: none;
  font-weight: 700;
}

.post-cta-link:hover {
  text-decoration: underline;
}

.post-cta-sub {
  font-size: 17px;
  color: #1f1f1f;
  margin-top: 4px;
}

.post-cta-form {
  display: flex;
  gap: 12px;
  margin-top: 22px;
  justify-content: center;
}

.post-cta-input {
  flex: 1;
  max-width: 400px;
  height: 46px;
  border: 1px solid #707070;
  border-radius: 12px;
  padding: 0 16px;
  font-size: 16px;
  font-family: Arial, sans-serif;
  color: #1f1f1f;
  outline: none;
}

.post-cta-input::placeholder {
  color: #979797;
}

.post-cta-submit {
  height: 46px;
  padding: 0 24px;
  background: #2055ff;
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-family: Arial, sans-serif;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.15s;
}

.post-cta-submit:hover {
  background: #1844dd;
}

.post-cta-success {
  display: none;
  font-size: 16px;
  color: #2055ff;
  margin-top: 18px;
}

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .header {
    height: auto;
    flex-wrap: wrap;
    padding: 8px 16px 10px;
    gap: 0 12px;
  }
  .header-search {
    order: 3;
    flex-basis: 100%;
    max-width: 100%;
    margin: 6px 0 0;
  }
}

@media (max-width: 1100px) {
  .blog-main {
    grid-template-columns: 1fr;
    padding: 40px 30px 60px;
    gap: 30px;
  }
  .intro-eyebrow { font-size: 52px; }
  .intro-sub { font-size: 22px; }
  .section-heading { margin-top: 30px; }
  .post-container { padding: 50px 40px; }
  .post-title { font-size: 32px; }
  .post-feature-placeholder { width: 120px; height: 120px; font-size: 90px; }
  .article-post { padding: 50px 40px 70px; }
  .article-title { font-size: 28px; }
}

@media (max-width: 768px) {
  .header { height: 72px; padding: 0 16px; gap: 12px; }
  .logo-svg { height: 36px; }
  .header-search { max-width: none; }
  .header-search input { height: 44px; font-size: 16px; padding: 0 14px 0 42px; border-radius: 12px; }
  .header-search-icon { left: 12px; width: 18px; height: 18px; }
  .header-bell { width: 26px; }
  .blog-main { padding: 30px 18px 50px; }
  .intro-eyebrow { font-size: 38px; }
  .intro-sub { font-size: 18px; }
  .section-heading { font-size: 24px; }
  .card { padding: 22px 22px; }
  .card-title { font-size: 22px; }
  .featured-card .card-title { font-size: 26px; }
  .featured-hero { font-size: 36px; padding: 24px 10px; }
  .card-excerpt { font-size: 16px; }
  .card-date { font-size: 14px; }
  .post-container { padding: 36px 22px; }
  .post-title { font-size: 26px; }
  .post-body { font-size: 16px; }
  .post-feature-placeholder { width: 100px; height: 100px; font-size: 72px; }
  .post-cta-form { flex-direction: column; align-items: stretch; }
  .post-cta-submit { width: 100%; }
  .article-post { padding: 36px 22px; }
  .article-title { font-size: 24px; }
  .article-body { font-size: 15px; text-align: left; }
  .article-byline { font-size: 14px; flex-direction: column; align-items: flex-start; gap: 4px; }
  .footer { font-size: 14px; padding: 20px 16px; flex-direction: column; gap: 8px; text-align: center; }
  .footer-link { font-size: 14px; }
  .card-head { gap: 10px; }
  .card-title { max-width: calc(100% - 100px); }
  .card-date { padding-top: 0; }
}