/* ============================================================
 * Home page — GeeksforGeeks-style multi-section design
 * ============================================================ */

/* Tight reset for home content area */
.md-typeset > section + section { margin-top: 3.5rem; }

/* ============================================================
 * HERO — split layout (text + code preview)
 * ============================================================ */
.edu-hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
  padding: 2.5rem 0 1rem;
}
@media (max-width: 60em) {
  .edu-hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 1rem; }
}

.edu-hero__left h1 {
  font-size: 2.75rem !important;
  font-weight: 800 !important;
  line-height: 1.08 !important;
  letter-spacing: -0.035em !important;
  margin: 0.5rem 0 1rem !important;
  border: 0 !important;
  padding: 0 !important;
  background: linear-gradient(135deg, #0F172A 0%, #4F46E5 60%, #8B5CF6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.edu-hero__badge {
  display: inline-block;
  background: var(--color-indigo-50);
  color: var(--color-indigo-600);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.35em 0.85em;
  border-radius: 999px;
  border: 1px solid rgba(79, 70, 229, 0.18);
}

.edu-hero__sub {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  max-width: 540px;
  margin-bottom: 1.6rem;
}

.edu-hero__cta { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Code preview — fake VS-Code panel */
.edu-code-preview {
  background: #0F172A;
  border-radius: 14px;
  box-shadow:
    0 24px 48px -12px rgba(15, 23, 42, 0.25),
    0 12px 24px -8px rgba(15, 23, 42, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
}
.edu-code-preview:hover {
  transform: translateY(-4px) rotate(-0.5deg);
  box-shadow:
    0 32px 64px -12px rgba(79, 70, 229, 0.35),
    0 16px 32px -8px rgba(15, 23, 42, 0.18);
}
.edu-code-preview__bar {
  display: flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.65em 1em;
  background: linear-gradient(180deg, #1E293B, #161E2E);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.edu-code-preview__bar > span:nth-child(1),
.edu-code-preview__bar > span:nth-child(2),
.edu-code-preview__bar > span:nth-child(3) {
  width: 10px; height: 10px; border-radius: 50%;
  background: #4B5563;
}
.edu-code-preview__bar > span:nth-child(1) { background: #EF4444; }
.edu-code-preview__bar > span:nth-child(2) { background: #F59E0B; }
.edu-code-preview__bar > span:nth-child(3) { background: #10B981; }
.edu-code-preview__file {
  margin-left: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.01em;
}
.edu-code-preview__body {
  margin: 0;
  padding: 1.2em 1.4em;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.75;
  color: #E2E8F0;
  background: transparent;
  overflow-x: auto;
}
.edu-code-preview__body code { display: block; background: transparent; padding: 0; }
.edu-code-preview .t-k { color: #C792EA; font-weight: 500; }
.edu-code-preview .t-c { color: #5C6370; font-style: italic; }
.edu-code-preview .t-n { color: #F78C6C; }
.edu-code-preview .t-f { color: #82AAFF; }

/* ============================================================
 * BUTTONS
 * ============================================================ */
.edu-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.7em 1.3em;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none !important;
  border: 0 !important;
  transition:
    transform 0.18s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.18s ease,
    background 0.15s ease;
  cursor: pointer;
}
.edu-btn--primary {
  background: linear-gradient(135deg, #4F46E5, #4338CA);
  color: #FFFFFF !important;
  box-shadow:
    0 8px 16px -4px rgba(79, 70, 229, 0.4),
    0 4px 8px -2px rgba(15, 23, 42, 0.1);
}
.edu-btn--primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 12px 24px -4px rgba(79, 70, 229, 0.5),
    0 6px 12px -2px rgba(15, 23, 42, 0.12);
}
.edu-btn--ghost {
  background: transparent;
  color: var(--color-indigo-600) !important;
  border: 1px solid var(--color-border-default) !important;
}
.edu-btn--ghost:hover {
  background: var(--color-indigo-50);
  border-color: var(--color-indigo-600) !important;
}
.edu-btn--white {
  background: #FFFFFF;
  color: #4F46E5 !important;
}
.edu-btn--white:hover { transform: translateY(-2px); }
.edu-btn--ghost-on-dark {
  background: transparent;
  color: rgba(255, 255, 255, 0.95) !important;
  border: 1px solid rgba(255, 255, 255, 0.3) !important;
}
.edu-btn--ghost-on-dark:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* ============================================================
 * STATS STRIP
 * ============================================================ */
.edu-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  background: linear-gradient(135deg, #FFFFFF 0%, #F8FAFC 100%);
  border: 1px solid var(--color-border-subtle);
  border-radius: 14px;
  padding: 1.5rem 0;
  margin: 3rem 0 0;
  box-shadow: var(--shadow-sm);
}
@media (max-width: 60em) {
  .edu-stats { grid-template-columns: repeat(2, 1fr); padding: 1rem 0; gap: 0; }
  .edu-stat:nth-child(odd) { border-right: 1px solid var(--color-border-subtle); }
}
.edu-stat {
  text-align: center;
  padding: 0.5rem 1rem;
  border-right: 1px solid var(--color-border-subtle);
}
.edu-stat:last-child { border-right: 0; }
.edu-stat strong {
  display: block;
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #0F172A 0%, #4F46E5 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.edu-stat span {
  display: block;
  color: var(--color-text-tertiary);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

/* ============================================================
 * SECTION WRAPPER + HEAD
 * ============================================================ */
.edu-section { margin: 3rem 0; }
.edu-section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 1.4rem 0;
  padding: 0;
}
.edu-section__head h2 {
  font-size: 1.4rem !important;
  font-weight: 700 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  letter-spacing: -0.018em;
}
.edu-section__tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-indigo-600);
  background: var(--color-indigo-50);
  padding: 0.25em 0.7em;
  border-radius: 999px;
}

/* ============================================================
 * FEATURED COURSE CARDS — large, illustrated
 * ============================================================ */
.edu-course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.2rem;
}

.edu-course-card {
  display: flex;
  flex-direction: column;
  background: #FFFFFF;
  border: 1px solid var(--color-border-subtle);
  border-radius: 14px;
  overflow: hidden;
  text-decoration: none !important;
  color: inherit !important;
  transition:
    transform 0.32s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.32s ease,
    border-color 0.2s ease;
  box-shadow: var(--shadow-sm);
}
.edu-course-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-indigo-600);
  box-shadow:
    0 20px 40px -10px rgba(79, 70, 229, 0.25),
    0 8px 16px -4px rgba(15, 23, 42, 0.1);
}

.edu-course-card__top {
  position: relative;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  min-height: 110px;
}
.edu-course-card__top--py  { background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%); }
.edu-course-card__top--api { background: linear-gradient(135deg, #E0F2FE 0%, #BAE6FD 100%); }
.edu-course-card__top--ml  { background: linear-gradient(135deg, #F5F3FF 0%, #DDD6FE 100%); }
.edu-course-card__top--ai  { background: linear-gradient(135deg, #FFF7ED 0%, #FED7AA 100%); }

.edu-course-card__icon {
  font-size: 2.4rem;
  line-height: 1;
}

.edu-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2em 0.6em;
  border-radius: 999px;
}
.edu-badge--green  { background: rgba(16,185,129,0.15); color: #047857; }
.edu-badge--blue   { background: rgba(14,165,233,0.15); color: #0369A1; }
.edu-badge--violet { background: rgba(139,92,246,0.15); color: #6D28D9; }
.edu-badge--orange { background: rgba(245,158,11,0.18); color: #B45309; }

.edu-course-card__body { padding: 1.2rem 1.4rem 1.4rem; flex-grow: 1; display: flex; flex-direction: column; }
.edu-course-card__body h3 {
  font-size: 1.05rem !important;
  font-weight: 700 !important;
  margin: 0 0 0.5rem !important;
  letter-spacing: -0.014em;
  color: var(--color-text-primary) !important;
}
.edu-course-card__body p {
  color: var(--color-text-secondary);
  font-size: 0.86rem;
  line-height: 1.55;
  margin: 0 0 1rem;
  flex-grow: 1;
}
.edu-course-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65em;
  font-size: 0.74rem;
  color: var(--color-text-tertiary);
  font-weight: 500;
  border-top: 1px dashed var(--color-border-subtle);
  padding-top: 0.7rem;
}

/* ============================================================
 * BY-CATEGORY MINI GRID
 * ============================================================ */
.edu-cat-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem !important;
  font-weight: 700 !important;
  margin: 2rem 0 0.9rem !important;
  color: var(--color-text-primary) !important;
}
.edu-cat-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--c, #4F46E5);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--c, #4F46E5) 15%, transparent);
}

.edu-mini-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
}

.edu-mini-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1rem;
  background: #FFFFFF;
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  text-decoration: none !important;
  color: inherit !important;
  transition:
    transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.18s ease,
    box-shadow 0.2s ease;
}
.edu-mini-card:hover {
  transform: translateX(3px);
  border-color: var(--color-indigo-600);
  box-shadow: 0 6px 14px -4px rgba(79, 70, 229, 0.18);
}
.edu-mini-card__icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
}
.edu-mini-card strong {
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: 0.92rem;
}
.edu-mini-card small {
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
  font-weight: 500;
}
.edu-mini-card--todo strong::after {
  /* spacer for pin */
}
.edu-mini-card .edu-pin {
  display: inline-block;
  background: var(--color-amber-50);
  color: var(--color-amber-500);
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.12em 0.5em;
  border-radius: 999px;
  margin-left: 0.4em;
  vertical-align: middle;
}

/* ============================================================
 * FEATURES (Why us) — 3 columns
 * ============================================================ */
.edu-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.2rem;
}
.edu-feature {
  background: #FFFFFF;
  border: 1px solid var(--color-border-subtle);
  border-radius: 14px;
  padding: 1.4rem 1.4rem 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.2s ease;
}
.edu-feature:hover {
  transform: translateY(-3px);
  border-color: var(--color-indigo-600);
  box-shadow: 0 14px 28px -8px rgba(79, 70, 229, 0.18);
}
.edu-feature__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: color-mix(in srgb, var(--c, #4F46E5) 12%, transparent);
  color: var(--c, #4F46E5);
  margin-bottom: 1rem;
}
.edu-feature h4 {
  font-size: 1rem !important;
  font-weight: 700 !important;
  margin: 0 0 0.4rem !important;
  color: var(--color-text-primary) !important;
  text-transform: none !important;
  letter-spacing: -0.012em !important;
}
.edu-feature p {
  color: var(--color-text-secondary);
  font-size: 0.86rem;
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
 * POPULAR CHAPTERS LIST
 * ============================================================ */
.edu-pop-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 0.6rem;
}
.edu-pop {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  background: #FFFFFF;
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  text-decoration: none !important;
  color: inherit !important;
  transition: border-color 0.2s ease, background 0.18s ease, transform 0.2s ease;
}
.edu-pop:hover {
  border-color: var(--color-indigo-600);
  background: var(--color-indigo-50);
  transform: translateX(3px);
}
.edu-pop__num {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, #EEF2FF, #DDD6FE);
  color: var(--color-indigo-600);
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-mono);
}
.edu-pop__body { flex-grow: 1; min-width: 0; }
.edu-pop__body strong {
  display: block;
  color: var(--color-text-primary);
  font-weight: 700;
  font-size: 0.9rem;
}
.edu-pop__body span {
  display: block;
  color: var(--color-text-tertiary);
  font-size: 0.78rem;
  margin-top: 0.15rem;
}
.edu-pop__time {
  color: var(--color-text-tertiary);
  font-size: 0.74rem;
  font-weight: 600;
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* ============================================================
 * CTA BANNER (big indigo banner)
 * ============================================================ */
.edu-cta-banner {
  position: relative;
  background: linear-gradient(135deg, #4338CA 0%, #4F46E5 50%, #6366F1 100%);
  border-radius: 18px;
  padding: 3.5rem 2.5rem;
  margin: 3rem 0 0;
  text-align: center;
  overflow: hidden;
  box-shadow:
    0 32px 64px -16px rgba(79, 70, 229, 0.4),
    0 16px 32px -8px rgba(15, 23, 42, 0.12);
}
.edu-cta-banner::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -50px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 70%);
  pointer-events: none;
}
.edu-cta-banner::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: -50px;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(139,92,246,0.18) 0%, rgba(139,92,246,0) 70%);
  pointer-events: none;
}
.edu-cta-banner__inner { position: relative; z-index: 1; }
.edu-cta-banner h2 {
  color: #FFFFFF !important;
  font-size: 1.85rem !important;
  font-weight: 800 !important;
  margin: 0 0 0.75rem !important;
  border: 0 !important;
  padding: 0 !important;
  letter-spacing: -0.024em;
}
.edu-cta-banner p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 1rem;
  margin: 0 0 1.5rem;
}
.edu-cta-banner__buttons {
  display: inline-flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Hide the giant hero card we built before */
.gfg-hero { display: none; }
.gfg-section { display: none; }
.gfg-grid { display: none; }