/* ============================================
   大赛报名页样式
   ============================================ */

/* --- Form Container --- */
.register-form-wrapper {
  max-width: 820px;
  margin: 0 auto;
}

/* --- Steps Indicator --- */
.steps-indicator {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 3rem;
  position: relative;
}

.steps-indicator::before {
  content: '';
  position: absolute;
  top: 18px;
  left: calc(50% - 180px);
  right: calc(50% - 180px);
  height: 2px;
  background: var(--border-light);
  z-index: 0;
}

.step-item {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  width: 120px;
  cursor: pointer;
}

.step-circle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--bg-dark);
  border: 2px solid var(--border-light);
  color: var(--text-muted);
  transition: all var(--duration-normal);
}

.step-item.active .step-circle {
  background: var(--gradient-cta);
  border-color: transparent;
  color: var(--text-white);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.step-item.done .step-circle {
  background: rgba(0, 212, 255, 0.15);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

.step-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}

.step-item.active .step-label,
.step-item.done .step-label {
  color: var(--text-white);
}

/* --- Form Step --- */
.form-step {
  display: none;
}

.form-step.active {
  display: block;
}

.form-step-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 0.5rem;
}

.form-step-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* --- Form Groups --- */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-group label .required {
  color: var(--energy-orange);
  margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: var(--text-white);
  background: var(--bg-card);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.08);
  background: var(--bg-card-hover);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-select option {
  background: var(--bg-dark);
  color: var(--text-white);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* --- File Upload --- */
.upload-area {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  background: var(--bg-card);
  transition: all var(--duration-normal);
  cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--neon-cyan);
  background: rgba(0, 212, 255, 0.03);
}

.upload-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
}

.upload-area p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.upload-area .upload-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* --- Track Selection Cards --- */
.track-select-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.track-select-card {
  position: relative;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-normal);
}

.track-select-card:hover {
  border-color: var(--border-medium);
  background: var(--bg-card-hover);
}

.track-select-card.selected {
  border-color: var(--neon-cyan);
  background: rgba(0, 212, 255, 0.05);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.08);
}

.track-select-card .track-radio {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border-medium);
  transition: all var(--duration-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.track-select-card.selected .track-radio {
  border-color: var(--neon-cyan);
  background: var(--neon-cyan);
}

.track-select-card.selected .track-radio::after {
  content: '✓';
  color: var(--bg-deep);
  font-size: 0.7rem;
  font-weight: 700;
}

.track-select-card h4 {
  font-size: 1rem;
  color: var(--text-white);
  margin-bottom: 0.4rem;
  padding-right: 2rem;
}

.track-select-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Radio/Checkbox Groups --- */
.radio-group,
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.radio-item,
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.radio-item:hover,
.checkbox-item:hover {
  border-color: var(--border-medium);
  background: var(--bg-card-hover);
}

.radio-item input,
.checkbox-item input {
  accent-color: var(--neon-cyan);
}

/* --- Form Actions --- */
.form-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-light);
}

.form-actions-right {
  justify-content: flex-end;
}

/* --- Success State --- */
.form-success {
  text-align: center;
  padding: 4rem 2rem;
}

.form-success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  background: rgba(0, 212, 255, 0.1);
  border: 2px solid var(--neon-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.form-success h3 {
  font-size: 1.5rem;
  color: var(--text-white);
  margin-bottom: 0.75rem;
}

.form-success p {
  color: var(--text-secondary);
  line-height: 1.8;
}

@media (max-width: 768px) {
  .track-select-grid {
    grid-template-columns: 1fr;
  }
  .steps-indicator {
    gap: 0.5rem;
    flex-wrap: wrap;
  }
  .steps-indicator::before {
    display: none;
  }
  .step-item {
    width: auto;
    flex: 1;
    min-width: 70px;
  }
}