@import url("https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;700;800&family=Source+Sans+3:wght@400;600;700&display=swap");

.cteis-page {
  --page-bg-1: #f3f8ff;
  --page-bg-2: #eaf7f4;
  --surface: #ffffff;
  --surface-soft: #f8fbff;
  --ink: #19263a;
  --muted: #5b6880;
  --line: #d5e1ef;
  --brand: #0e5ba6;
  --brand-strong: #0b4a88;
  --accent: #ff8a3d;
  --shadow-soft: 0 16px 44px rgba(16, 43, 76, 0.12);
  --shadow-card: 0 10px 24px rgba(16, 43, 76, 0.1);
}

.cteis-page,
.cteis-page * {
  box-sizing: border-box;
}

.cteis-page {
  margin: 0;
  min-height: 100%;
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  color: var(--ink);
  line-height: 1.65;
  background:
    radial-gradient(900px 420px at 10% 0%, rgba(14, 91, 166, 0.14), transparent 60%),
    radial-gradient(740px 360px at 96% 12%, rgba(255, 138, 61, 0.18), transparent 58%),
    linear-gradient(160deg, var(--page-bg-1) 0%, var(--page-bg-2) 100%);
  padding: 2.25rem 1.25rem;
}

.cteis-container {
    width: 100%;
    margin: 0 auto;
    background: linear-gradient(180deg, var(--surface) 0%, var(--surface-soft) 100%);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-soft);
}

.cteis-page-layout {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(300px, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.cteis-main-content {
  min-width: 0;
}

.cteis-page h1,
.cteis-page h2,
.cteis-page h3,
.cteis-page h4,
.cteis-page h5,
.cteis-page h6 {
  font-family: "Outfit", "Segoe UI", sans-serif;
  margin: 0;
  color: #132844;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.cteis-page h2 {
  font-size: clamp(1.45rem, 2.1vw, 1.9rem);
  margin-top: 2rem;
  margin-bottom: 0.9rem;
}

.cteis-page h3 {
  font-size: clamp(1.2rem, 1.75vw, 1.55rem);
  margin-top: 1.4rem;
  margin-bottom: 0.65rem;
}

.cteis-page h4 {
  font-size: clamp(1.1rem, 1.45vw, 1.3rem);
  margin-top: 1rem;
  margin-bottom: 0.4rem;
}

.cteis-page h5 {
  font-size: clamp(1.03rem, 1.2vw, 1.12rem);
  margin-top: 0.8rem;
  margin-bottom: 0.35rem;
}

.cteis-page h6 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-top: 0.8rem;
}

.cteis-page p {
  margin: 0 0 0.9rem;
}

.cteis-page ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

.cteis-page li {
  margin-bottom: 0.58rem;
}

.cteis-page li::marker {
  color: var(--accent);
}

.cteis-page a {
  color: var(--brand);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(14, 91, 166, 0.35);
  text-underline-offset: 0.16em;
  transition: color 180ms ease, text-decoration-color 180ms ease;
}

.cteis-page a:hover,
.cteis-page a:focus-visible {
  color: var(--brand-strong);
  text-decoration-color: currentColor;
}

.cteis-page strong {
  color: #15345f;
}

.cteis-muted {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 0.85rem;
}

.cteis-docs-section {
  margin-top: 2.3rem;
  padding-top: 1.65rem;
  border-top: 1px solid var(--line);
}

.cteis-docs-section > p {
  color: var(--muted);
  max-width: 76ch;
  margin-bottom: 1.2rem;
}

.cteis-guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.cteis-guide-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: var(--shadow-card);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.cteis-guide-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 28px rgba(16, 43, 76, 0.14);
}

.cteis-guide-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  display: block;
  border-bottom: 1px solid var(--line);
}

.cteis-guide-card-content {
  padding: 0.9rem 1rem 1.05rem;
}

.cteis-guide-card-content h3 {
  margin-top: 0;
  margin-bottom: 0.45rem;
  font-size: 1.18rem;
}

.cteis-guide-card-content p {
  margin: 0;
  font-size: 1rem;
  color: #2f3f58;
}

.cteis-side-panel {
  position: sticky;
  top: 1rem;
  border: 1px solid #bfd2e8;
  border-radius: 16px;
  background: linear-gradient(180deg, #f8fcff 0%, #edf5ff 100%);
  box-shadow: var(--shadow-card);
  padding: 1.05rem 1rem;
}

.cteis-side-panel h3 {
  margin-top: 0.1rem;
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
}

.cteis-date-block {
  border-top: 1px solid #cdddff;
  padding-top: 0.78rem;
  margin-top: 0.78rem;
}

.cteis-date-block:first-of-type {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.cteis-date-block h4 {
  margin-top: 0;
  margin-bottom: 0.35rem;
  font-size: 1.02rem;
}

.cteis-date-block p {
  margin: 0 0 0.45rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

.cteis-date-subtitle {
  color: #3d5f83;
  font-weight: 700;
}

.cteis-callout {
  border-left: 4px solid var(--accent);
  background: #fff4eb;
  border-radius: 7px;
  padding: 0.55rem 0.6rem;
  margin-top: 0.35rem;
}

@media (max-width: 860px) {
  .cteis-page-layout {
    grid-template-columns: 1fr;
  }

  .cteis-side-panel {
    position: static;
    top: auto;
    order: -1;
  }

  .cteis-container {
    padding: 1.45rem;
    border-radius: 16px;
  }

  .cteis-guide-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

@media (max-width: 640px) {
  .cteis-page {
    padding: 0.9rem;
  }

  .cteis-container {
    padding: 1.1rem;
    border-radius: 14px;
  }

  .cteis-guide-grid {
    grid-template-columns: 1fr;
  }

  .cteis-guide-card img {
    height: 186px;
  }
}