:root {
  --form-bg: rgba(10, 17, 32, 0.85);
  --input-bg: rgba(4, 8, 15, 0.6);
  --input-border: var(--navy-border);
  --input-focus: var(--red-500);
}

/* ============================================================
   CREATIVE HERO & SELECTION GRID
   ============================================================ */
.sec-hero {
  position: relative;
  min-height: 100vh;
  width: 100%;
  background: var(--navy-900);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 10rem 0;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-inner {
  position: relative;
  z-index: 10;
  width: 100%;
}

.selection-header {
  text-align: center;
  margin-bottom: 6rem;
}

.hero-headline {
  font-family: 'Playfair Display', serif;
  font-size: clamp(4rem, 8vw, 7rem);
  font-weight: 700;
  color: var(--white);
  margin: 1.5rem 0;
}

.hero-headline span {
  color: var(--red-500);
}

.reg-selection-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Creative Choice Cards */
.reg-choice-card {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 5rem 4rem;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.reg-choice-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, var(--red-glow), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.reg-choice-card:hover {
  transform: translateY(-10px);
  border-color: var(--red-500);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.reg-choice-card:hover::before {
  opacity: 1;
}

.card-icon-wrap {
  width: 90px;
  height: 90px;
  background: var(--white-04);
  border: 1px solid var(--white-08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  color: var(--red-400);
  transition: all 0.4s ease;
  z-index: 2;
}

.reg-choice-card:hover .card-icon-wrap {
  background: var(--red-500);
  color: var(--white);
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 10px 20px var(--red-glow);
}

.card-content {
  position: relative;
  z-index: 2;
}

.card-content h3 {
  font-family: 'Playfair Display', serif;
  font-size: 2.8rem;
  margin-bottom: 1.5rem;
  color: var(--white);
}

.card-content h3 span {
  color: var(--red-400);
}

.card-content p {
  font-size: 1.5rem;
  color: var(--grey-300);
  line-height: 1.6;
  margin-bottom: 2.5rem;
}

.card-cta {
  font-size: 1.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 1rem;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.reg-choice-card:hover .card-cta {
  opacity: 1;
}

/* Back Button */
.back-to-selection {
  background: none;
  border: 1px solid var(--white-15);
  color: var(--grey-300);
  padding: 1rem 2rem;
  border-radius: 50px;
  cursor: pointer;
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 3rem;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.back-to-selection:hover {
  background: var(--white-08);
  color: var(--white);
  border-color: var(--white-40);
}

/* State Transitions */
.grid-out {
  transform: scale(0.9);
  opacity: 0;
  pointer-events: none;
}

#form-container-reveal {
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  margin-top: -50vh; /* Slide in effect */
  opacity: 0;
  transform: translateY(50px);
}

#form-container-reveal.reveal-in {
  margin-top: 0;
  opacity: 1;
  transform: translateY(0);
}

/* Form Container */
.reg-form-container {
  max-width: 900px;
  margin: 4rem auto;
  background: var(--form-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--white-08);
  border-radius: var(--radius-lg);
  padding: 5rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reg-form-container.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Section Headings */
.form-section-title {
  font-family: 'Playfair Display', serif;
  font-size: 2.8rem;
  color: var(--white);
  margin-bottom: 3rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.form-section-title::after {
  content: '';
  flex-grow: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--red-500), transparent);
}

.form-group-title {
  font-size: 1.4rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--red-400);
  margin: 4rem 0 2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--white-08);
}

/* Grid Layout */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.full-width {
  grid-column: span 2;
}

/* Form Elements */
.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.form-field label {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--grey-300);
  letter-spacing: 0.02em;
}

.form-field input,
.form-field select,
.form-field textarea {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  padding: 1.4rem 1.6rem;
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  transition: all var(--transition);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 4px var(--red-glow);
  background: rgba(4, 8, 15, 0.8);
}

.form-field select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='white'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1.5rem center;
  background-size: 1.5rem;
  padding-right: 4.5rem;
}

/* Delegate Card (for School) */
.delegate-card {
  background: var(--white-04);
  border: 1px solid var(--white-08);
  border-radius: var(--radius-md);
  padding: 3rem;
  margin-bottom: 3rem;
  position: relative;
  transition: all var(--transition);
}

.delegate-card:hover {
  border-color: var(--white-15);
  background: var(--white-08);
}

.delegate-num {
  position: absolute;
  top: -1rem;
  left: 2rem;
  background: var(--red-500);
  color: var(--white);
  font-weight: 800;
  font-size: 1.2rem;
  padding: 0.4rem 1.2rem;
  border-radius: 4px;
}

/* Radio/Checkboxes Group */
.radio-group {
  display: flex;
  gap: 3rem;
  margin-top: 0.5rem;
}

.radio-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
}

.radio-item input[type="radio"] {
  width: 2rem;
  height: 2rem;
  accent-color: var(--red-500);
  cursor: pointer;
}

.radio-item span {
  font-size: 1.4rem;
  color: var(--white-90);
}

/* Submit Section */
.form-submit-row {
  margin-top: 5rem;
  padding-top: 3rem;
  border-top: 1px solid var(--white-08);
  display: flex;
  justify-content: flex-end;
}

.btn-submit {
  padding: 1.6rem 5rem;
  font-size: 1.6rem;
  letter-spacing: 0.1em;
  border-radius: 50px;
}

/* Conditional Fields */
.hidden {
  display: none !important;
}

.form-field input.input-invalid,
.form-field select.input-invalid {
  border-color: #ff3e3e !important;
  box-shadow: 0 0 0 4px rgba(255, 62, 62, 0.1) !important;
}

.input-error-msg {
  color: #ff3e3e;
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 0.5rem;
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* Responsive */
@media (max-width: 768px) {
  .reg-form-container {
    padding: 3rem 2rem;
    margin: 2rem 1rem;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .full-width {
    grid-column: span 1;
  }
  .form-section-title {
    font-size: 2.2rem;
  }
}