/* ── Section rhythm ──────────────────────────────────────── */
section { padding: var(--s11) 0; position: relative; }

@media (max-width: 768px) { section { padding: var(--s10) 0; } }
@media (max-width: 640px) { section { padding: var(--s9) 0; } }

.section-head { max-width: 680px; margin-bottom: var(--s9); }
.section-head__title { margin-top: var(--s4); }
.section-head__sub {
  margin-top: var(--s5);
  font-size: 1.05rem; color: var(--text-muted); line-height: 1.65;
}

/* Alternating backgrounds */
.problem, .tracks, .earn { background: var(--bg-elev); }

.problem { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.tracks  { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.earn    { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ── Nav ─────────────────────────────────────────────────── */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 50; padding: var(--s4) 0; }

/* ── Hero ────────────────────────────────────────────────── */
.hero { padding: 160px 0 var(--s11); overflow: hidden; }
@media (max-width: 768px) { .hero { padding: 100px 0 var(--s10); } }
@media (max-width: 480px)  { .hero { padding: 84px 0 var(--s9); } }

.hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.45;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 20%, transparent 75%);
  z-index: 0;
}

.hero__inner {
  position: relative; z-index: 1;
  max-width: 860px;
}

.hero__headline { margin-top: var(--s6); }

.hero__tagline {
  margin-top: var(--s5);
  display: inline-block;
  font-size: clamp(1.2rem, 2.3vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.4;
  color: var(--text);
  background: linear-gradient(transparent 46%, rgba(91, 78, 255, 0.16) 46%);
  padding-bottom: 3px;
}
@media (max-width: 480px) { .hero__tagline { font-size: 1.15rem; } }

.hero__sub {
  margin-top: var(--s6);
  font-size: 1.125rem; max-width: 580px; line-height: 1.65;
}

.hero__cta { margin-top: var(--s8); display: flex; flex-wrap: wrap; gap: var(--s4); }
@media (max-width: 480px) {
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; justify-content: center; }
}

.hero__chips {
  margin-top: var(--s7);
  display: flex; flex-wrap: wrap; gap: var(--s3);
}

/* ── Problem comparison ──────────────────────────────────── */
.problem__grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s6);
}
@media (max-width: 768px) { .problem__grid { grid-template-columns: 1fr; } }

/* ── How it works ────────────────────────────────────────── */
.how__phases {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s7); align-items: start;
}
@media (max-width: 768px) { .how__phases { grid-template-columns: 1fr; gap: var(--s6); } }

/* ── Tracks ──────────────────────────────────────────────── */
.tracks__grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s6);
}
@media (max-width: 768px) { .tracks__grid { grid-template-columns: 1fr; } }

/* ── Curriculum accordion ────────────────────────────────── */
.curriculum-list { border-top: 1px solid var(--border); }

/* ── Brief ───────────────────────────────────────────────── */
.brief__grid {
  display: grid; grid-template-columns: 1.15fr 1fr;
  gap: var(--s9); align-items: start;
}
@media (max-width: 1024px) { .brief__grid { grid-template-columns: 1fr; } }
@media (max-width: 640px) {
  .brief-flow { flex-direction: column; align-items: flex-start; }
  .brief-flow__arrow { display: none; }
}

/* ── Pricing ─────────────────────────────────────────────── */
.pricing__grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s6); max-width: 780px;
  align-items: start;
}
@media (max-width: 640px) { .pricing__grid { grid-template-columns: 1fr; } }

/* ── What you earn ───────────────────────────────────────── */
.outcomes-list {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s4); list-style: none; padding: 0; margin-top: var(--s7);
}
@media (max-width: 640px) { .outcomes-list { grid-template-columns: 1fr; } }

/* ── Enroll ──────────────────────────────────────────────── */
.enroll {
  padding: var(--s10) 0;
  text-align: center;
  background: var(--accent-soft);
}

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

.enroll__buttons {
  display: flex; flex-wrap: wrap;
  gap: var(--s4); justify-content: center;
  margin-top: var(--s7);
}

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  padding: var(--s8) 0 var(--s6);
}

.footer__inner {
  display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: var(--s5);
}

.footer__links { display: flex; gap: var(--s6); flex-wrap: wrap; }

/* ── Mobile utilities ────────────────────────────────────── */
@media (max-width: 640px) { .hide-mobile { display: none !important; } }

@media (max-width: 480px) {
  .container { padding-left: var(--s4); padding-right: var(--s4); }
}