* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', sans-serif;
  background: #f0f4f8;
  color: #1a1a2e;
}

/* NAVBAR */
.navbar {
  background: #1a1a2e;
  padding: 15px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.logo {
  color: #00d4ff;
  font-size: 22px;
  font-weight: 700;
}
.nav-links a {
  color: #fff;
  text-decoration: none;
  margin-left: 25px;
  font-size: 15px;
  transition: color 0.3s;
}
.nav-links a:hover { color: #00d4ff; }
.call-btn {
  background: #00d4ff !important;
  color: #1a1a2e !important;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
}

/* HERO */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: white;
  padding: 100px 40px;
  text-align: center;
}
.hero h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}
.hero p {
  font-size: 20px;
  color: #a0aec0;
  margin-bottom: 40px;
}
.btn-primary {
  background: linear-gradient(135deg, #00d4ff, #0095b6);
  color: #1a1a2e;
  padding: 15px 35px;
  border: none;
  border-radius: 30px;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  margin: 8px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0,212,255,0.4);
}
.btn-secondary {
  background: transparent;
  color: white;
  padding: 14px 35px;
  border: 2px solid #00d4ff;
  border-radius: 30px;
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  margin: 8px;
  transition: all 0.3s;
}
.btn-secondary:hover {
  background: #00d4ff;
  color: #1a1a2e;
}

/* SECTIONS */
.section {
  padding: 70px 40px;
  max-width: 1100px;
  margin: 0 auto;
}
.section h2 {
  font-size: 36px;
  text-align: center;
  margin-bottom: 50px;
  color: #1a1a2e;
}

/* PROBLEM GRID */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
}
.problem-card {
  background: white;
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  padding: 30px 15px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
}
.problem-card:hover {
  border-color: #00d4ff;
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,212,255,0.2);
}
.problem-card.active {
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  border-color: #00d4ff;
  color: white;
}
.problem-card .icon { font-size: 40px; margin-bottom: 10px; }
.problem-card p { font-size: 14px; font-weight: 600; }

/* BOOKING FORM */
.booking-section { background: white; border-radius: 20px; padding: 50px; }
.selected-problem {
  background: #fff3cd;
  border: 2px solid #ffc107;
  border-radius: 10px;
  padding: 15px;
  margin-bottom: 25px;
  font-weight: 600;
  text-align: center;
}
.selected-problem.confirmed {
  background: #d4edda;
  border-color: #28a745;
  color: #155724;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-bottom: 20px;
}
.form-grid input,
.form-grid select {
  padding: 14px 18px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-size: 15px;
  outline: none;
  transition: border-color 0.3s;
  width: 100%;
}
.form-grid input:focus,
.form-grid select:focus { border-color: #00d4ff; }

.btn-location {
  background: #f0f4f8;
  border: 2px dashed #00d4ff;
  color: #1a1a2e;
  padding: 14px 25px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: all 0.3s;
}
.btn-location:hover { background: #e0f7fa; }
.full-width { width: 100%; margin-top: 20px; }
#locationStatus {
  color: #28a745;
  font-weight: 600;
  margin-top: 10px;
  text-align: center;
}

/* PAYMENT */
.payment-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
  max-width: 500px;
  margin: 0 auto;
}
.pay-card {
  background: white;
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s;
}
.pay-card:hover {
  border-color: #00d4ff;
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,212,255,0.2);
}
.pay-card .icon { font-size: 50px; margin-bottom: 15px; }
.pay-card p { font-size: 18px; font-weight: 700; }
.pay-card small { color: #718096; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero h1 { font-size: 30px; }
  .form-grid { grid-template-columns: 1fr; }
  .navbar { padding: 15px 20px; }
  .nav-links a { margin-left: 12px; font-size: 13px; }
  .payment-grid { grid-template-columns: 1fr; }
}