/* =========================================================
   GCSE Maths Topics Main Page
   ========================================================= */

.page-container {
  background:
    radial-gradient(circle at top left, rgba(250, 204, 21, 0.16), transparent 28rem),
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.14), transparent 30rem),
    linear-gradient(180deg, #eef4ff 0%, #f8fbff 45%, #ffffff 100%);
  padding: 3rem 1rem 4rem;
}

.page-container > section {
  width: min(1120px, 100%);
  margin: 0 auto 2rem;
}

/* HERO */

.topics-hero {
  background:
    linear-gradient(rgba(11, 18, 32, 0.78), rgba(17, 28, 52, 0.9)),
    url("/static/img/home/home_hero_normal.avif");
  background-size: cover;
  background-position: center;
  border-radius: 30px;
  padding: clamp(2rem, 5vw, 4rem);
  color: #ffffff;
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.24);
}

.topics-hero__content {
  max-width: 850px;
}

.topics-hero__eyebrow {
  display: inline-flex;
  margin-bottom: 1rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: rgba(250, 204, 21, 0.18);
  color: #facc15;
  font-weight: 800;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.topics-hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.topics-hero p {
  max-width: 800px;
  margin: 0 0 1rem;
  color: #dbeafe;
  font-size: 1.08rem;
  line-height: 1.75;
}

.topics-hero a {
  color: #facc15;
  font-weight: 700;
  text-decoration: none;
}

.topics-hero__actions {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

/* BUTTONS */

.primary-button,
.secondary-button,
.category-main-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none !important;
  border-bottom: none !important;
  transition: transform 0.16s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.primary-button,
.secondary-button {
  padding: 0.9rem 1.35rem;
}

.primary-button {
  background: #facc15;
  color: #0f172a !important;
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.24);
}

.secondary-button {
  background: rgba(255,255,255,0.14);
  color: #ffffff !important;
  border: 1px solid rgba(255,255,255,0.28);
}

.primary-button:hover,
.secondary-button:hover,
.category-main-link:hover {
  transform: translateY(-2px);
}

/* SECTIONS */

.topic-section {
  background: rgba(255,255,255,0.86);
  border: 1px solid #dbeafe;
  border-radius: 26px;
  padding: clamp(1.4rem, 3vw, 2rem);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.08);
}

.topic-section h2 {
  margin: 0 0 0.85rem;
  color: #1e40af;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
  line-height: 1.15;
}

.topic-section p {
  color: #475569;
  line-height: 1.75;
}

.section-intro {
  max-width: 850px;
  font-size: 1.05rem;
}

.section-note {
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  border-left: 5px solid #facc15;
  border-radius: 14px;
  background: #fffbeb;
}

/* STUDY ORDER */

.study-order-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
  margin-top: 1.5rem;
  align-items: stretch;
}

.mini-card {
  background: linear-gradient(180deg, #ffffff 0%, #f3f7ff 100%);
  border: 1px solid #bfdbfe;
  border-radius: 22px;
  padding: 1.25rem;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.07);
}

.mini-card h3 {
  margin: 0 0 0.7rem;
  font-size: 1.2rem;
}

.mini-card h3 a {
  color: #0f172a !important;
  text-decoration: none !important;
  border-bottom: none !important;
}

.mini-card p {
  margin: 0 0 1rem;
}

/* CATEGORY GRID */

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
  margin-top: 1.5rem;
  align-items: start;
}

.category-card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid #bfdbfe;
  border-radius: 26px;
  padding: 1.4rem;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
  height: auto;
}

.category-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.category-header h3 {
  margin: 0;
  font-size: 1.45rem;
}

.category-header h3 a {
  color: #0f172a !important;
  text-decoration: none !important;
  border-bottom: none !important;
}

.topic-count {
  flex: 0 0 auto;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: #facc15;
  color: #0f172a;
  font-size: 0.82rem;
  font-weight: 800;
}

.category-description {
  margin: 0.9rem 0 1rem;
}

.category-main-link {
  padding: 0.55rem 0.9rem;
  background: #1e40af;
  color: #ffffff !important;
  font-size: 0.92rem;
}

.category-main-link:hover {
  background: #1d4ed8;
}

/* TOPIC LINKS */

.topic-link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem 0.9rem;
  margin: 1rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid #dbeafe;
  list-style: none;
}

.topic-link-list a {
  display: block;
  color: #1e40af !important;
  background: #eef4ff;
  padding: 0.45rem 0.65rem;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none !important;
  border-bottom: none !important;
  line-height: 1.35;
}

.topic-link-list a:hover {
  background: #dbeafe;
  color: #0f172a !important;
}

/* MOBILE */

@media (max-width: 900px) {
  .study-order-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-container {
    padding: 2rem 1rem 3rem;
  }

  .topics-hero__actions {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .category-header {
    flex-direction: column;
  }

  .topic-link-list {
    grid-template-columns: 1fr;
  }
}