/* ===== Conference Form – Modern UI ===== */
:root{
  --conf-bg: #0b0f19;
  --conf-card: #ffffff;
  --conf-ink: #0f172a;
  --conf-ink-soft:#475569;
  --conf-primary:#2563eb;
  --conf-primary-600:#1d4ed8;
  --conf-ring: rgba(37, 99, 235, .18);
  --conf-muted:#f1f5f9;
  --conf-border:#e2e8f0;
  --conf-success:#16a34a;
  --conf-warning:#f59e0b;
  --conf-danger:#ef4444;
}

@media (prefers-color-scheme: dark){
  :root{
    --conf-card:#0b1220;
    --conf-ink:#e5e7eb;
    --conf-ink-soft:#94a3b8;
    --conf-muted:#0f172a;
    --conf-border:#1e293b;
    --conf-ring: rgba(59,130,246,.25);
  }
}

/* Card container */
#conf-register-form{
  --pad: 20px;
  max-width: 880px;
  margin: 32px auto;
  padding: calc(var(--pad) + 8px) calc(var(--pad) + 6px);
  background: var(--conf-card);
  color: var(--conf-ink);
  border: 1px solid var(--conf-border);
  border-radius: 18px;
  box-shadow:
    0 10px 25px rgba(2,8,23,.06),
    0 2px 6px rgba(2,8,23,.04);
  position: relative;
  isolation: isolate;
  animation: conf-fade-in .35s ease-out both;
}

#conf-register-form h2{
  margin: 0 0 10px;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.2;
  letter-spacing: -.02em;
}

#conf-register-form .conf-sub{
  margin: 0 0 18px;
  color: var(--conf-ink-soft);
  font-size: 14px;
}

/* Grid */
.conf-grid{
  display: grid;
  gap: 14px;
}
@media (min-width: 720px){
  .conf-grid.two{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.conf-full{ grid-column: 1 / -1; }

/* Field */
.conf-field{
  display: grid;
  gap: 6px;
}
.conf-field label{
  font-size: 13px;
  font-weight: 600;
  color: var(--conf-ink-soft);
  letter-spacing: .2px;
}
.conf-req:after{ content:" *"; color: var(--conf-danger); }

/* Inputs & selects */
.conf-field input[type="text"],
.conf-field input[type="email"],
.conf-field input[type="tel"],
.conf-field input[type="date"],
.conf-field select{
  appearance: none;
  width: 100%;
  height: 46px;
  padding: 10px 14px;
  border: 1px solid var(--conf-border);
  border-radius: 12px;
  background: var(--conf-muted);
  color: var(--conf-ink);
  font-size: 15px;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease, transform .02s ease;
}
.conf-field select{
  background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg' fill='%236b7280'%3E%3Cpath d='M7 10l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 38px;
}
.conf-field input:focus,
.conf-field select:focus{
  outline: none;
  border-color: var(--conf-primary);
  box-shadow: 0 0 0 6px var(--conf-ring);
  background: #fff;
}
.conf-field input:active,
.conf-field select:active{ transform: translateY(0.5px); }

/* Helpers / states */
.hidden{ display: none !important; }
.conf-help{
  font-size: 12px;
  color: var(--conf-ink-soft);
  margin-top: 4px;
}

/* Divider */
.conf-divider{
  height: 1px;
  background: var(--conf-border);
  margin: 14px 0 6px;
}

/* Price pill (sticky) */
#price-display{
  position: sticky;
  bottom: 8px;
  margin-top: 10px;
  background: linear-gradient(180deg, #fff, #f8fafc);
  color: var(--conf-ink);
  border: 1px solid var(--conf-border);
  border-radius: 14px;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  box-shadow: 0 12px 30px rgba(2,8,23,.10);
}
@media (prefers-color-scheme: dark){
  #price-display{
    background: linear-gradient(180deg, #0b1220, #0a1527);
  }
}
#price-display .conf-price{
  font-weight: 700;
  font-size: 18px;
}
#price-display .conf-badge{
  font-size: 12px;
  font-weight: 700;
  color: #065f46;
  background: rgba(16,185,129,.15);
  border: 1px solid rgba(16,185,129,.35);
  padding: 4px 8px;
  border-radius: 999px;
  margin-left: 8px;
}

/* Buttons */
#conf-register-form button[type="submit"],
.conf-btn{
  cursor: pointer;
  appearance: none;
  border: 0;
  background: linear-gradient(135deg, var(--conf-primary), var(--conf-primary-600));
  color: #fff;
  font-weight: 700;
  letter-spacing: .2px;
  padding: 12px 18px;
  height: 46px;
  min-width: 160px;
  border-radius: 12px;
  box-shadow: 0 12px 24px rgba(37,99,235,.25), 0 2px 8px rgba(15,23,42,.15);
  transition: transform .08s ease, box-shadow .12s ease, filter .12s ease;
}
#conf-register-form button[type="submit"]:hover{
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(37,99,235,.32), 0 6px 14px rgba(15,23,42,.18);
  filter: brightness(1.02);
}
#conf-register-form button[type="submit"]:active{
  transform: translateY(0);
}

#conf-register-form .btn-row{
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}

/* Subtle header ribbon */
#conf-register-form::before{
  content:"";
  position: absolute;
  inset: 0 auto auto 0;
  height: 7px; width: 100%;
  background: linear-gradient(90deg, var(--conf-primary), #22c55e, #eab308, #f97316);
  border-top-left-radius: 18px; border-top-right-radius: 18px;
  opacity: .9;
}

/* Animations */
@keyframes conf-fade-in{
  from{ opacity: 0; transform: translateY(6px); }
  to  { opacity: 1; transform: translateY(0); }
}

.conference-form-wrapper {
  max-width: 700px;
  margin: 40px auto;
  padding: 30px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
  font-family: "Segoe UI", Tahoma, sans-serif;
}

.conference-form-wrapper h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #2c3e50;
}

.form-row {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
}

.form-row label {
  font-weight: 600;
  margin-bottom: 6px;
  color: #34495e;
}

.form-row input, 
.form-row select {
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  transition: border 0.3s;
  font-size: 15px;
}

.form-row input:focus,
.form-row select:focus {
  border-color: #3498db;
  outline: none;
}

.hidden {
  display: none;
}

.form-total {
  text-align: right;
  font-size: 18px;
  margin: 20px 0;
}

.submit-btn {
  width: 100%;
  background: linear-gradient(135deg, #3498db, #2ecc71);
  border: none;
  color: #fff;
  font-size: 18px;
  padding: 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.3s;
}

.submit-btn:hover {
  background: linear-gradient(135deg, #2980b9, #27ae60);
}

.spinner {
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top: 3px solid #fff;
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Loading State for Button */
.submit-btn.loading .btn-text {
  visibility: hidden;
}

.submit-btn.loading .spinner {
  display: block;
  position: absolute;
}