/* BrainSTEM main site — editorial layout refresh */

body {
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: #f4f8fc;
  color: #0f172a;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(4rem, 9vw, 6rem) 0 clamp(3rem, 6vw, 4.5rem);
  background: linear-gradient(155deg, #ffffff 0%, #eef6ff 42%, #f4f8fc 100%);
  border-bottom: 1px solid rgba(0, 120, 212, 0.08);
}

.hero__mesh {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 45% at 85% 15%, rgba(0, 120, 212, 0.14), transparent 60%),
    radial-gradient(ellipse 40% 35% at 10% 80%, rgba(14, 165, 233, 0.1), transparent 55%);
  pointer-events: none;
}

.hero__grid {
  position: relative;
  z-index: 1;
}

.hero__title {
  font-size: clamp(2rem, 4.5vw, 3.15rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.08;
  max-width: 14ch;
}

.hero__subtitle {
  font-size: 1.125rem;
  max-width: 38rem;
  color: #475569;
}

.eyebrow {
  color: #0078d4;
  background: rgba(0, 120, 212, 0.08);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(0, 120, 212, 0.15);
}

/* ---------- Stats band ---------- */
.stats-band {
  background: linear-gradient(90deg, #0078d4, #0ea5e9);
  color: #fff;
  padding: 1.35rem 0;
}

.stats-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0;
}

.stats-band__item {
  text-align: center;
  padding: 0.5rem 1.75rem;
  flex: 1 1 140px;
}

.stats-band__value {
  display: block;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.stats-band__label {
  font-size: 0.8rem;
  opacity: 0.88;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stats-band__divider {
  width: 1px;
  height: 2.5rem;
  background: rgba(255, 255, 255, 0.35);
  flex-shrink: 0;
}

/* ---------- Section system ---------- */
.section {
  padding: clamp(4rem, 8vw, 5.5rem) 0;
}

.section--alt {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border-block: none;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #0078d4;
  margin-bottom: 0.65rem;
}

.section-header--left {
  text-align: left;
  margin-inline: 0;
  max-width: 40rem;
}

.section-title--left {
  text-align: left;
}

.section-lead--left {
  text-align: left;
  margin-inline: 0;
}

.section-title {
  font-weight: 800;
  letter-spacing: -0.03em;
}

/* ---------- About ---------- */
.about__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.about__pillars {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid #e2e8f0;
}

.about__pillar {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid #e2e8f0;
}

.about__pillar-num {
  font-size: 0.75rem;
  font-weight: 800;
  color: #0078d4;
  letter-spacing: 0.08em;
  padding-top: 0.2rem;
}

.about__pillar h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.about__pillar p {
  margin: 0;
  color: #64748b;
  font-size: 0.95rem;
}

/* ---------- Categories editorial ---------- */
.category-grid--editorial {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 3rem;
  column-gap: clamp(2rem, 5vw, 4rem);
}

.category-grid--editorial .category-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 1.15rem 0 1.15rem 1rem;
  border-left: 3px solid #0078d4;
  box-shadow: none;
  margin-bottom: 0;
}

.category-grid--editorial .category-card:hover {
  transform: none;
  box-shadow: none;
  border-left-color: #0ea5e9;
  padding-left: 1.15rem;
  background: linear-gradient(90deg, rgba(0, 120, 212, 0.06), transparent);
}

.category-grid--editorial .category-card__emoji {
  display: none;
}

.category-grid--editorial .category-card__title {
  font-size: 1.05rem;
  font-weight: 700;
}

/* ---------- Course catalog (list, not cards) ---------- */
.course-catalog {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid #e2e8f0;
}

.course-catalog .course-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  gap: 0.35rem 1.5rem;
  align-items: center;
  padding: 1.25rem 0;
  border: none;
  border-radius: 0;
  border-bottom: 1px solid #e2e8f0;
  box-shadow: none;
  background: transparent;
}

.course-catalog .course-card:hover {
  transform: none;
  box-shadow: none;
  background: linear-gradient(90deg, rgba(234, 244, 255, 0.65), transparent);
}

.course-catalog .course-card__title {
  grid-column: 1;
  grid-row: 1;
  font-size: 1.05rem;
  font-weight: 700;
}

.course-catalog .course-card__meta {
  grid-column: 2;
  grid-row: 1 / 3;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  justify-content: flex-end;
  font-size: 0.75rem;
}

.course-catalog .course-card__meta li {
  margin: 0;
  background: #f1f5f9;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.course-catalog .meta-label {
  min-width: auto;
  font-weight: 600;
  color: #64748b;
}

.course-catalog .course-card__text {
  grid-column: 1;
  grid-row: 2;
  font-size: 0.9rem;
  max-width: 52rem;
}

.course-catalog .course-details-btn {
  grid-column: 2;
  grid-row: 2;
  width: auto;
  justify-self: end;
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}

/* ---------- Corporate ---------- */
.corporate__layout {
  align-items: start;
}

.corporate__highlight {
  padding: 2rem;
  border-radius: 16px;
  background: linear-gradient(145deg, #0078d4, #0c4a6e);
  color: #fff;
}

.corporate-quote {
  margin: 0 0 1.25rem;
  padding: 0;
  border: none;
}

.corporate-quote p {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.45;
  font-style: normal;
}

.corporate-highlights {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.corporate-highlights li {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
}

/* ---------- Clients cloud ---------- */
.clients__cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  max-width: 52rem;
  margin-inline: auto;
}

.client-chip {
  font-size: 0.875rem;
  font-weight: 600;
  color: #334155;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid #e2e8f0;
  background: #fff;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.client-chip:hover {
  border-color: #0078d4;
  color: #0078d4;
}

/* Hide old client grid if present */
.clients__grid {
  display: none;
}

/* ---------- Contact ---------- */
.contact {
  background: linear-gradient(180deg, #f8fafc 0%, #eef6ff 100%);
}

.contact-form {
  border: 1px solid #e2e8f0;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.06);
  border-radius: 16px;
}

/* ---------- Calendar widget softer ---------- */
.calendar-widget__shell {
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  box-shadow: none;
}

/* ---------- Diploma promo ---------- */
.diploma-promo {
  border-block: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .about__layout {
    grid-template-columns: 1fr;
  }

  .category-grid--editorial {
    grid-template-columns: 1fr;
  }

  .course-catalog .course-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 0.75rem;
  }

  .course-catalog .course-card__meta {
    grid-column: 1;
    grid-row: auto;
    justify-content: flex-start;
  }

  .course-catalog .course-details-btn {
    grid-column: 1;
    justify-self: start;
    width: 100%;
  }

  .stats-band__divider {
    display: none;
  }
}

@media (max-width: 768px) {
  .hero__title {
    max-width: none;
  }

  .section-header--left,
  .section-title--left,
  .section-lead--left {
    text-align: center;
  }

  .section-header--left .section-tag {
    display: table;
    margin-inline: auto;
  }
}

/* Form validation (contact) */
.contact-form input.error,
.contact-form select.error,
.contact-form textarea.error,
.captcha-widget input.error {
  border-color: #dc2626 !important;
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.15) !important;
}

.field-error {
  display: block;
  min-height: 1.1rem;
  font-size: 0.75rem;
  color: #dc2626;
  margin-top: 0.25rem;
}