:root{
  --bg: #f4efff;
  --text: #141326;
  --muted: #5a5a73;

  --card: rgba(255,255,255,0.86);
  --border: rgba(83,55,170,0.24);

  --accent: #6b46ff;     /* richer purple */
  --accent2: #73d6b1;    /* soft mint */

  --shadow: 0 18px 60px rgba(20,19,38,0.10);
  --radius: 18px;
}

*{ box-sizing: border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(980px 520px at 16% 8%, rgba(107,70,255,0.34), transparent 58%),
    radial-gradient(900px 520px at 84% 0%, rgba(160,122,255,0.22), transparent 62%),
    var(--bg);
  line-height: 1.5;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }

.container{
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header{
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(244,239,255,0.82);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px 0;
}

.brand{
  font-weight: 800;
  letter-spacing: 0.2px;
}

.nav{
  display:flex;
  gap: 16px;
  align-items:center;
}

.hero{
  padding: 56px 0 26px;
}

.hero-inner{
  display:grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
  align-items: start;
}

h1{
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.15;
  margin: 0 0 12px;
}

.lead{
  font-size: 1.06rem;
  color: var(--muted);
  margin: 0 0 18px;
  max-width: 62ch;
}

.hero-actions{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 10px 0 14px;
}

.ticks{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.section{
  padding: 34px 0;
}

.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.hero-card{
  background: linear-gradient(135deg, rgba(107,70,255,0.22), rgba(160,122,255,0.16));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.pricing-grid .card{
  position: relative;
}

.featured{
  outline: 2px solid rgba(107,70,255,0.40);
}

.badge{
  position:absolute;
  top: 14px;
  right: 14px;
  background: rgba(107,70,255,0.18);
  border: 1px solid rgba(107,70,255,0.42);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
}

.price{
  font-size: 2rem;
  font-weight: 800;
  margin: 8px 0 0;
}
.price span{
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.muted{ color: var(--muted); }
.small{ font-size: 0.95rem; }

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(107,70,255,0.42);
  background: rgba(107,70,255,0.18);
  font-weight: 700;
  text-decoration: none;
}
.btn:hover{
  text-decoration:none;
  border-color: rgba(107,70,255,0.62);
}
.btn-ghost{
  background: rgba(255,255,255,0.5);
  border-color: var(--border);
}
.btn-small{ padding: 8px 12px; }
.btn-full{ width: 100%; }

.site-footer{
  border-top: 1px solid var(--border);
  padding: 18px 0 28px;
  margin-top: 24px;
}
.footer-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.footer-links{
  display:flex;
  gap: 14px;
}

/* Mobile */
@media (max-width: 860px){
  .hero-inner{ grid-template-columns: 1fr; }
  .grid{ grid-template-columns: 1fr; }
}

.dashboard-main{
  padding-top: 36px;
}

.page-intro{
  margin-bottom: 20px;
}

.eyebrow{
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  color: var(--muted);
  margin: 0;
}

.level-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.level-card h2,
.topic-card h2{
  margin-top: 4px;
  margin-bottom: 8px;
}

.level-tag{
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(107,70,255,0.18);
  font-size: .82rem;
  margin: 0;
}

.topic-preview{
  color: var(--muted);
  padding-left: 18px;
  margin-top: 8px;
  margin-bottom: 16px;
}

.topic-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.topic-card .btn{
  margin-top: 8px;
}

.topic-layout{
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 16px;
  align-items: start;
}

.lesson-nav{
  position: sticky;
  top: 84px;
}

.lesson-nav h2{
  margin-top: 0;
}

.lesson-nav ol{
  padding-left: 18px;
  margin-bottom: 0;
}

.lesson-section{
  margin-bottom: 14px;
}

.lesson-section h2{
  margin-top: 0;
}

.lesson-list{
  padding-left: 18px;
  margin: 10px 0 0;
}

.check-item{
  display: block;
  margin-bottom: 10px;
}

@media (max-width: 860px){
  .level-grid,
  .topic-grid,
  .topic-layout{
    grid-template-columns: 1fr;
  }

  .lesson-nav{
    position: static;
  }
}