/* ── UK Driving Theory — Auth Modal Styles ── */
#ukdt-modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999999;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.25s ease;
}
#ukdt-modal-backdrop.ukdt-open {
  display: flex !important;
  opacity: 1;
}
#ukdt-modal-box {
  background: linear-gradient(160deg, #ffffff, #f6f7fb);
  border: 1px solid rgba(15,23,42,.12);
  border-radius: 24px;
  padding: 2.25rem 2rem 2rem;
  width: 100%;
  max-width: 420px;
  position: relative;
  box-shadow: 0 32px 80px rgba(15,23,42,.22), 0 0 0 1px rgba(37,99,235,.08);
  transform: translateY(16px);
  transition: transform 0.25s ease;
  font-family: "Rubik", system-ui, sans-serif;
}
#ukdt-modal-backdrop.ukdt-open #ukdt-modal-box {
  transform: translateY(0);
}
#ukdt-modal-close {
  position: absolute;
  top: 1rem; right: 1rem;
  background: rgba(15,23,42,.06);
  border: 1px solid rgba(15,23,42,.1);
  color: rgba(15,23,42,.5);
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s, color .2s;
  line-height: 1;
}
#ukdt-modal-close:hover { background: rgba(15,23,42,.12); color: rgba(15,23,42,.9); }
.ukdt-modal-logo { text-align: center; font-size: 2.2rem; margin-bottom: .5rem; }
.ukdt-modal-title {
  text-align: center; font-size: 1.25rem; font-weight: 600;
  color: #0f172a; margin: 0 0 .25rem;
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-modal-sub {
  text-align: center; font-size: .85rem;
  color: rgba(15,23,42,.5); margin: 0 0 1.5rem;
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-tabs {
  display: flex;
  background: rgba(15,23,42,.05);
  border-radius: 12px;
  padding: 3px;
  margin-bottom: 1.5rem;
  gap: 2px;
}
.ukdt-tab-btn {
  flex: 1; padding: .45rem .5rem;
  border: none; background: transparent;
  color: rgba(15,23,42,.5); border-radius: 10px;
  font-family: "Rubik", system-ui, sans-serif;
  font-size: .82rem; font-weight: 500;
  cursor: pointer; transition: background .2s, color .2s;
}
.ukdt-tab-btn.active {
  background: #ffffff; color: #0f172a;
  box-shadow: 0 2px 8px rgba(15,23,42,.1);
}
.ukdt-tab-content { display: none; }
.ukdt-tab-content.active { display: block; }
.ukdt-form-group { margin-bottom: .9rem; }
.ukdt-form-group label {
  display: block; font-size: .78rem; font-weight: 500;
  color: rgba(15,23,42,.6); margin-bottom: .3rem;
  text-transform: uppercase; letter-spacing: .04em;
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-form-group input {
  width: 100%; padding: .65rem .85rem;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(15,23,42,.14);
  border-radius: 12px; color: #0f172a;
  font-size: .95rem;
  font-family: "Rubik", system-ui, sans-serif;
  outline: none;
  transition: border .2s, box-shadow .2s;
  box-sizing: border-box;
}
.ukdt-form-group input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}
.ukdt-form-group input::placeholder { color: rgba(15,23,42,.3); }
.ukdt-submit-btn {
  width: 100%; padding: .8rem;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff; border: none; border-radius: 14px;
  font-family: "Rubik", system-ui, sans-serif;
  font-size: .95rem; font-weight: 600;
  cursor: pointer;
  transition: transform .15s, box-shadow .2s, filter .2s;
  margin-top: .4rem;
  box-shadow: 0 6px 20px rgba(37,99,235,.3);
}
.ukdt-submit-btn:hover { filter: brightness(1.05); transform: translateY(-1px); }
.ukdt-submit-btn:active { transform: translateY(0); }
.ukdt-submit-btn:disabled { opacity: .65; cursor: not-allowed; transform: none; }
.ukdt-msg {
  font-size: .82rem; min-height: 1.1em; margin: .35rem 0;
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-msg.err { color: #dc2626; }
.ukdt-msg.ok  { color: #16a34a; }
.ukdt-form-footer {
  text-align: center; margin-top: .9rem;
  font-size: .82rem; color: rgba(15,23,42,.5);
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-form-footer a {
  color: #2563eb; text-decoration: none; cursor: pointer;
}
.ukdt-form-footer a:hover { text-decoration: underline; }
/* Payment tab */
.ukdt-plan-box {
  background: linear-gradient(160deg, rgba(219,234,254,.5), rgba(224,231,255,.4));
  border: 1px solid rgba(37,99,235,.18);
  border-radius: 18px; padding: 1.4rem;
  text-align: center; margin-bottom: 1rem;
}
.ukdt-plan-badge-sm {
  display: inline-block;
  background: linear-gradient(90deg, #d97706, #f59e0b);
  color: #fff; font-size: .68rem; font-weight: 700;
  padding: .2rem .55rem; border-radius: 999px;
  text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: .8rem;
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-plan-price-sm {
  font-size: 2.4rem; font-weight: 700;
  color: #0f172a; line-height: 1;
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-plan-price-sm span {
  font-size: 1rem; color: rgba(15,23,42,.5); font-weight: 400;
}
.ukdt-plan-feats {
  list-style: none; padding: 0; margin: .9rem 0 0; text-align: left;
}
.ukdt-plan-feats li {
  padding: .3rem 0; font-size: .87rem;
  color: rgba(15,23,42,.8);
  display: flex; align-items: center; gap: .5rem;
  font-family: "Rubik", system-ui, sans-serif;
}
.ukdt-plan-feats li::before {
  content: "✓"; color: #16a34a; font-weight: 700; flex-shrink: 0;
}
.ukdt-pay-btn {
  width: 100%; padding: .9rem;
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff; border: none; border-radius: 14px;
  font-family: "Rubik", system-ui, sans-serif;
  font-size: 1rem; font-weight: 600;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(16,185,129,.35);
  transition: filter .2s, transform .15s;
}
.ukdt-pay-btn:hover { filter: brightness(1.05); transform: translateY(-1px); }
.ukdt-pay-btn:disabled { opacity: .65; cursor: not-allowed; transform: none; }
.ukdt-secure {
  font-size: .75rem; color: rgba(15,23,42,.4);
  text-align: center; margin-top: .65rem;
  font-family: "Rubik", system-ui, sans-serif;
}
/* Spinner */
.ukdt-spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: ukdt-spin .6s linear infinite;
  vertical-align: middle; margin-right: .4rem;
}
@keyframes ukdt-spin { to { transform: rotate(360deg); } }
/* Nav button shortcode */
.ukdt-nav-btn {
  display: inline-block;
  padding: 8px 20px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff !important;
  border-radius: 10px;
  font-family: "Rubik", system-ui, sans-serif;
  font-size: .9rem;
  font-weight: 500;
  text-decoration: none !important;
  transition: filter .2s;
}
.ukdt-nav-btn:hover { filter: brightness(1.06); }
@media (max-width: 480px) {
  #ukdt-modal-box { padding: 1.75rem 1.25rem 1.5rem; }
  .ukdt-plan-price-sm { font-size: 2rem; }
}