/* ========================================
   YOUR ANSWER — PHYSICS
   Subject Homepage
   ======================================== */

.physics-page {
  --physics-accent: #4d78a8;
  --physics-accent-soft: #edf3fa;
  padding-bottom: 70px;
}

html[data-theme="dark"] .physics-page {
  --physics-accent-soft: #202d3d;
}


/* ========================================
   HERO
   ======================================== */

.physics-page .subject-hero {
  padding: 64px 0 52px;
  border-bottom: 1px solid var(--color-border);
}

.physics-page .subject-eyebrow {
  margin: 0 0 14px;
  color: var(--physics-accent);
  font-size: .78rem;
  font-weight: 750;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.physics-page .subject-hero h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: .98;
  letter-spacing: -.065em;
}

.physics-page .subject-intro {
  max-width: 700px;
  margin: 24px 0 0;
  color: var(--color-text-muted);
  font-size: 1.08rem;
  line-height: 1.8;
}

.physics-page .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 28px;
}

.physics-page .hero-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-height: 44px;
  padding: 0 17px;

  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 11px;

  text-decoration: none;

  transition:
    transform .2s ease,
    border-color .2s ease,
    background-color .2s ease;
}

.physics-page .hero-button:hover {
  transform: translateY(-2px);
  border-color: var(--physics-accent);
}

.physics-page .hero-button.primary {
  color: #fff;
  background: var(--physics-accent);
  border-color: var(--physics-accent);
}


/* ========================================
   SECTIONS
   ======================================== */

.physics-page .section {
  padding-top: 52px;
}

.physics-page .section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.physics-page .section-heading h2 {
  margin: 0;
  font-size: clamp(1.65rem, 4vw, 2.25rem);
  letter-spacing: -.04em;
}

.physics-page .section-heading p {
  max-width: 470px;
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* ========================================
   LEARNING PATH
   ======================================== */

.physics-page .learning-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.physics-page .topic-card {
  position: relative;

  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: start;

  min-width: 0;
  padding: 21px;

  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;

  text-decoration: none;

  transition:
    transform .22s ease,
    border-color .22s ease,
    box-shadow .22s ease;
}

.physics-page .topic-card:hover {
  transform: translateY(-3px);
  border-color: var(--physics-accent);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .06);
}

html[data-theme="dark"] .physics-page .topic-card:hover {
  box-shadow: 0 12px 28px rgba(0, 0, 0, .2);
}

.physics-page .topic-number {
  display: grid;
  place-items: center;

  width: 36px;
  height: 36px;

  color: var(--physics-accent);
  background: var(--physics-accent-soft);
  border-radius: 10px;

  font-size: .78rem;
  font-weight: 800;
}

.physics-page .topic-content h3 {
  margin: 1px 0 6px;
  font-size: 1.08rem;
  letter-spacing: -.02em;
}

.physics-page .topic-content p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: .9rem;
  line-height: 1.65;
}

.physics-page .topic-arrow {
  color: var(--color-text-muted);
  font-size: 1.15rem;
}


/* ========================================
   EXPLORE FURTHER
   ======================================== */

.physics-page .explore-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.physics-page .explore-card {
  padding: 25px;

  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 17px;

  text-decoration: none;

  transition:
    transform .22s ease,
    border-color .22s ease;
}

.physics-page .explore-card:hover {
  transform: translateY(-3px);
  border-color: var(--physics-accent);
}

.physics-page .explore-label {
  display: block;
  margin-bottom: 12px;

  color: var(--physics-accent);

  font-size: .73rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.physics-page .explore-card h3 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

.physics-page .explore-card p {
  margin: 0;
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* ========================================
   PHYSICS LAB
   ======================================== */

.physics-page .lab-card {
  position: relative;
  overflow: hidden;

  padding: 34px;

  color: var(--color-text);
  background: var(--physics-accent-soft);
  border: 1px solid var(--color-border);
  border-radius: 20px;
}

.physics-page .lab-card::after {
  content: "F = ma";

  position: absolute;
  right: 30px;
  bottom: 12px;

  color: var(--physics-accent);
  opacity: .08;

  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 800;
  letter-spacing: -.08em;

  pointer-events: none;
}

.physics-page .lab-label {
  display: block;
  margin-bottom: 12px;

  color: var(--physics-accent);

  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.physics-page .lab-card h2 {
  max-width: 650px;
  margin: 0 0 10px;

  font-size: clamp(1.7rem, 4vw, 2.4rem);
  letter-spacing: -.045em;
}

.physics-page .lab-card p {
  position: relative;
  z-index: 1;

  max-width: 650px;
  margin: 0;

  color: var(--color-text-muted);
  line-height: 1.75;
}

.physics-page .lab-link {
  position: relative;
  z-index: 1;

  display: inline-flex;
  margin-top: 22px;
  padding: 11px 16px;

  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;

  text-decoration: none;

  transition:
    transform .2s ease,
    border-color .2s ease;
}

.physics-page .lab-link:hover {
  transform: translateY(-2px);
  border-color: var(--physics-accent);
}


/* ========================================
   BOTTOM LINKS
   ======================================== */

.physics-page .bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;

  margin-top: 38px;
  padding-top: 24px;

  border-top: 1px solid var(--color-border);
}

.physics-page .bottom-links a {
  color: var(--color-text-muted);
  text-decoration: none;

  transition: color .2s ease;
}

.physics-page .bottom-links a:hover {
  color: var(--physics-accent);
}


/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 760px) {

  .physics-page .subject-hero {
    padding-top: 42px;
  }

  .physics-page .learning-grid,
  .physics-page .explore-grid {
    grid-template-columns: 1fr;
  }

  .physics-page .section-heading {
    display: block;
  }

  .physics-page .section-heading p {
    margin-top: 9px;
  }
}


@media (max-width: 520px) {

  .physics-page .subject-hero {
    padding-top: 32px;
  }

  .physics-page .topic-card {
    grid-template-columns: auto 1fr;
  }

  .physics-page .topic-arrow {
    display: none;
  }

  .physics-page .lab-card {
    padding: 25px;
  }
}