/* ========================================
   IELTS GUIDE STYLES
   ======================================== */

/* Hero */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  color: white;
  padding: 80px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(59,130,246,.1) 0%, transparent 50%);
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
  letter-spacing: -0.03em;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.8;
  max-width: 700px;
  margin: 0 auto 32px;
  position: relative;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  position: relative;
}

.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2.5rem; font-weight: 900; }
.hero-stat .label { font-size: 0.85rem; opacity: 0.7; }

/* Band Score Cards */
.band-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.band-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 2px solid var(--border);
  text-align: center;
  transition: all 0.3s;
}

.band-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.band-card .band-num {
  font-size: 2.5rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.band-card .band-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.band-card .band-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.band-card.highlighted {
  border-color: var(--accent);
  background: #fff7ed;
}

/* Vocab Grid */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.vocab-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.vocab-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.vocab-card .meaning {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.vocab-card .example {
  font-size: 0.85rem;
  font-style: italic;
  color: var(--blue);
}

/* Responsive IELTS Guide */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .hero-stats { gap: 24px; }
  .hero-stat .num { font-size: 1.8rem; }
  .band-grid { grid-template-columns: repeat(2, 1fr); }
  .vocab-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .band-grid { grid-template-columns: 1fr; }
}