:root{
  --bg: #f4f8ff;
  --card: #ffffff;
  --text: #0b1b3a;
  --muted: rgba(11, 27, 58, 0.70);
  --border: rgba(29, 78, 216, 0.12);

  --primary: #1d4ed8;
  --primary2: #2563eb;
  --soft: rgba(29, 78, 216, 0.08);
  --shadow: 0 14px 34px rgba(13, 35, 85, 0.10);
}

*{ box-sizing:border-box; }
body{
  margin:0;
  background:
    radial-gradient(900px 500px at 10% 0%, rgba(37,99,235,0.16), transparent 60%),
    radial-gradient(900px 500px at 90% 10%, rgba(29,78,216,0.12), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.container{ max-width: 980px; margin: 0 auto; padding: 18px; }

.topbar{
  position: sticky; top:0;
  background: rgba(244,248,255,0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
.topbar-inner{ display:flex; align-items:center; justify-content:space-between; gap:12px; }
.brand{ font-weight: 900; letter-spacing: .2px; }
.brand-accent{ color: var(--primary); }

.nav a{ color: var(--text); text-decoration:none; margin-left: 12px; }
.nav a:hover{ opacity:.85; }

.hero{ padding: 18px 0 32px; }
.hero-card{
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.78));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.grid3{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 14px; }
.grid2{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 14px; }
@media (max-width: 840px){
  .grid3, .grid2{ grid-template-columns:1fr; }
}

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 10px 22px rgba(13,35,85,0.06);
}
.card.mini{ padding: 14px; }

.muted{ color: var(--muted); }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  border-radius: 12px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-decoration:none;
  color: var(--text);
  cursor:pointer;
  background: #fff;
}
.btn-primary{
  background: linear-gradient(135deg, rgba(29,78,216,1), rgba(37,99,235,1));
  color: #fff;
}
.btn-ghost{
  background: #fff;
}
.btn:hover{ transform: translateY(-1px); }

.pill{
  display:inline-flex;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
}

.wizard{ max-width: 780px; margin: 0 auto; }
.wizard-head{ margin: 10px 0 12px; }
.progress{ color: var(--muted); font-size: 14px; margin-bottom: 8px; }

.tip{
  border: 1px solid rgba(29,78,216,0.22);
  border-radius: 14px;
  padding: 12px 14px;
  background: var(--soft);
  margin: 10px 0 16px;
}

.form p{ margin: 10px 0; }
.form label{ display:block; margin-bottom: 6px; color: var(--muted); font-weight: 600; }
.form input, .form textarea, .form select{
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(29,78,216,0.18);
  background: #fff;
  color: var(--text);
  outline: none;
}
.form input:focus, .form textarea:focus, .form select:focus{
  border-color: rgba(29,78,216,0.55);
  box-shadow: 0 0 0 4px rgba(29,78,216,0.12);
}
.form small{ color: var(--muted); }

.actions{ display:flex; gap: 10px; align-items:center; margin-top: 14px; flex-wrap: wrap; }

.review-grid{ display:grid; grid-template-columns: 1.3fr 1fr; gap: 14px; }
@media (max-width: 900px){ .review-grid{ grid-template-columns:1fr; } }

.tags{ display:flex; flex-wrap: wrap; gap: 8px; }
.tag{
  border: 1px solid rgba(29,78,216,0.18);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--text);
  font-size: 13px;
  background: #fff;
}

.qr-wrap{ display:flex; justify-content:center; margin: 14px 0; }
.qr{
  width: 240px; height: 240px;
  border-radius: 16px;
  border: 1px solid rgba(29,78,216,0.18);
  background: #fff;
}

.copybox textarea{ width:100%; margin-bottom: 10px; }

.price{ font-size: 22px; font-weight: 900; margin-top: 6px; color: var(--primary); }

.footer{ border-top: 1px solid var(--border); margin-top: 26px; }
.footer-inner{
  display:flex; justify-content:space-between; align-items:center;
  padding: 16px 18px; color: var(--muted);
}

.pay-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap: 10px;
  margin-bottom: 14px;
}
.status-pill{
  border: 1px solid rgba(29,78,216,0.18);
  background: #fff;
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
}
.status-pill.paid{
  border-color: rgba(16,185,129,0.35);
  background: rgba(16,185,129,0.10);
  color: rgba(6,95,70,1);
}

.pay-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 900px){
  .pay-grid{ grid-template-columns:1fr; }
}

.lesson{
  border: 1px solid rgba(29,78,216,0.18);
  background: rgba(29,78,216,0.06);
  border-radius: 16px;
  padding: 14px;
  margin: 12px 0 16px;
}

.lesson-title{
  font-weight: 900;
  color: rgba(11,27,58,0.92);
  margin-bottom: 10px;
}

.lesson-list{
  margin: 0 0 10px 18px;
  color: rgba(11,27,58,0.80);
  line-height: 1.5;
}

.chips{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.chip{
  border: 1px solid rgba(29,78,216,0.22);
  background: #fff;
  color: rgba(11,27,58,0.90);
  padding: 9px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
}

.chip:hover{
  transform: translateY(-1px);
  border-color: rgba(29,78,216,0.35);
  box-shadow: 0 10px 18px rgba(13,35,85,0.08);
}

.selectable{
  cursor:pointer;
  transition: .2s ease;
}
.selectable.active{
  border-color: rgba(29,78,216,0.6);
  box-shadow: 0 16px 36px rgba(29,78,216,0.18);
}
.photo-box{
  margin-top:12px;
}

.checkbox{
  display:flex;
  align-items:center;
  gap:8px;
  font-weight:600;
  margin:6px 0 10px;
}

.card.mini{
  margin-bottom:16px;
}
.checkbox-inline{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  cursor: pointer;
}

.checkbox-inline input[type="checkbox"]{
  width: 16px;
  height: 16px;
  cursor: pointer;
}
.preview-wrap{
  position: relative;
  margin-top: 14px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.08);
  background: #f9fafb;
}

.preview-img{
  width: 100%;
  display: block;
  pointer-events: none;
  user-select: none;
}

.preview-tag{
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(255,255,255,0.92);
  color: #111827;
  font-size: 12px;
  font-weight: 800;
  padding: 6px 10px;
  border-radius: 999px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
}
.pay-actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}

.secure-row{
  display:flex;
  gap:12px;
  align-items:center;
  margin-top:14px;
  padding:12px;
  border:1px solid rgba(0,0,0,.08);
  border-radius:14px;
  background:#f8fbff;
}

.secure-badge{
  width:96px;
  height:auto;
  display:block;
}

.secure-title{
  font-weight:900;
  font-size:14px;
}
.checkbox-inline{
  display:flex;
  align-items:center;
  gap:10px;
  line-height:1;
  user-select:none;
}
.checkbox-inline input[type="checkbox"]{
  width:18px;
  height:18px;
  margin:0;
}

.chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:12px;
}
.chip{
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);
  color:inherit;
  padding:9px 12px;
  border-radius:999px;
  cursor:pointer;
  font-weight:700;
}
.chip:hover{
  background:rgba(255,255,255,.10);
}
@media (max-width: 640px){

  .container{
    padding: 12px;
  }

  .topbar-inner{
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .nav{
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .nav a{
    margin-left: 0;
  }

  .btn{
    padding: 10px 12px;
  }

  .hero{
    padding-top: 12px;
    padding-bottom: 20px;
  }

  .pay-head{
    flex-direction: column;
    gap: 8px;
  }
}
.btn-lg{
  padding: 14px 22px;
  font-size: 16px;
}

.btn-full{
  width: 100%;
  justify-content: center;
}

@media (min-width: 640px){
  .btn-full{
    width: auto;
    min-width: 260px;
  }
}
label.btn.btn-primary{
  color: #fff !important;
}