:root {
  --reg-bg-main: #667eea;
  --reg-bg-soft: #eef2ff;
  --reg-panel: #ffffff;
  --reg-border: #dbe3f5;
  --reg-text: #111827;
  --reg-muted: #4b5563;
  --reg-brand: #38d39a;
  --reg-brand-dark: #2bb47c;
  --reg-focus: rgba(56, 211, 154, 0.25);
}

body {
  background:
    radial-gradient(circle at top right, #8ea1ff 0%, var(--reg-bg-main) 36%, #5a6de6 100%) !important;
  color: var(--reg-text);
}

.registro-main {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 36px 18px;
}

.registro-container {
  background: var(--reg-panel);
  border-radius: 20px;
  border: 1px solid var(--reg-border);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.16);
  padding: 34px 30px 28px;
  width: min(860px, 100%);
  max-width: 860px;
}

.registro-header {
  margin-bottom: 22px;
}

.registro-header h1 {
  color: var(--reg-brand);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin: 0 0 8px;
  line-height: 1.2;
}

.registro-header p {
  color: var(--reg-muted);
  margin: 0;
  font-size: 0.98rem;
}

.registro-alert {
  border-radius: 10px;
  padding: 11px 14px;
  margin-bottom: 20px;
  font-size: 0.95rem;
  border: 1px solid transparent;
  display: none;
}

.registro-alert.success {
  background: #ecfdf5;
  border-color: #bbf7d0;
  color: #065f46;
}

.registro-alert.error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #b91c1c;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field.full {
  grid-column: 1 / -1;
}

.form-grid .field label {
  color: #1f2937;
  font-size: 0.92rem;
  font-weight: 600;
  margin: 0;
}

.form-grid .field input:not([type="checkbox"]),
.form-grid .field select {
  background: #f8fafc;
  border: 1px solid #d1d5db;
  color: #111827;
  border-radius: 10px;
  min-height: 44px;
  padding: 10px 12px;
  width: 100%;
  font-size: 0.97rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.form-grid .field input:not([type="checkbox"])::placeholder {
  color: #9ca3af;
}

.form-grid .field input:not([type="checkbox"]):focus,
.form-grid .field select:focus {
  border-color: var(--reg-brand);
  box-shadow: 0 0 0 3px var(--reg-focus);
  outline: none;
}

.checkbox-field {
  border: 1px solid #e2e8f0;
  background: var(--reg-bg-soft);
  border-radius: 12px;
  padding: 12px 14px;
  gap: 8px;
}

.checkbox-field label {
  color: #1f2937;
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.45;
}

.terms-checkbox-field label {
  align-items: flex-start;
}

.checkbox-field input[type="checkbox"] {
  width: 18px;
  height: 18px;
  padding: 0;
  margin-top: 2px;
  border: 1px solid #94a3b8;
  accent-color: var(--reg-brand);
  flex-shrink: 0;
  cursor: pointer;
}

.terms-checkbox-field .terms-link {
  color: var(--reg-brand-dark);
  font-weight: 700;
  text-decoration: underline;
}

.terms-checkbox-field .terms-link:hover {
  color: #239968;
}

.terms-note {
  color: #64748b;
  font-size: 0.79rem;
  margin-left: 28px;
  line-height: 1.35;
}

.btn-registro {
  background: linear-gradient(135deg, var(--reg-brand) 0%, #25be86 100%);
  color: #ffffff;
  border: none;
  border-radius: 12px;
  min-height: 48px;
  width: 100%;
  font-size: 1.02rem;
  font-weight: 700;
  margin-top: 22px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.btn-registro:hover {
  box-shadow: 0 10px 22px rgba(37, 190, 134, 0.28);
  transform: translateY(-1px);
  filter: brightness(1.02);
}

.btn-registro:disabled {
  opacity: 0.62;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  filter: grayscale(0.1);
}

.registro-footer {
  margin-top: 24px;
  text-align: center;
}

.registro-footer a {
  color: var(--reg-brand-dark);
  text-decoration: none;
  font-weight: 600;
}

.registro-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .registro-main {
    padding: 24px 14px;
  }

  .registro-container {
    padding: 24px 18px 20px;
    width: min(96vw, 700px);
  }

  .form-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

@media (max-width: 520px) {
  .registro-main {
    padding: 16px 10px;
  }

  .registro-container {
    border-radius: 14px;
    padding: 18px 14px;
  }

  .terms-note {
    margin-left: 0;
  }
}