/* ============================================
   AUTH MODAL — Login/Registro Universal
   Glass-morphism + Coral palette
   ============================================ */

.auth-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.auth-overlay.open {
  opacity: 1;
  visibility: visible;
}

.auth-modal {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(43, 107, 243, 0.15);
  border-radius: var(--radius-2xl, 20px);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2), 0 0 40px rgba(43, 107, 243, 0.08);
  width: 100%;
  max-width: 420px;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s ease;
  overflow: hidden;
}

.auth-overlay.open .auth-modal {
  transform: translateY(0) scale(1);
}

/* Header */
.auth-header {
  background: linear-gradient(135deg, #2B6BF3 0%, #1D39A7 100%);
  padding: var(--space-6) var(--space-6) var(--space-4);
  text-align: center;
  position: relative;
}

.auth-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 20px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px 20px 0 0;
}

.auth-close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 32px;
  height: 32px;
  border: none;
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  z-index: 1;
}

.auth-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.auth-logo {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-3);
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: white;
}

.auth-title {
  color: white;
  font-size: var(--font-size-xl, 20px);
  font-weight: 700;
  margin: 0;
}

.auth-subtitle {
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--font-size-sm, 14px);
  margin-top: var(--space-1);
}

/* Tabs */
.auth-tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border-light, #E2E8F0);
  margin: 0 var(--space-6);
  position: relative;
  z-index: 1;
}

.auth-tab {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  text-align: center;
  font-size: var(--font-size-sm, 14px);
  font-weight: 600;
  color: var(--color-text-muted, #94A3B8);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
  font-family: inherit;
}

.auth-tab.active {
  color: var(--color-primary, #2B6BF3);
  border-bottom-color: var(--color-primary, #2B6BF3);
}

.auth-tab:hover:not(.active) {
  color: var(--color-text-light, #64748B);
}

/* Form body */
.auth-body {
  padding: var(--space-6);
}

.auth-form {
  display: none;
}

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

.auth-field {
  margin-bottom: var(--space-4);
}

.auth-field label {
  display: block;
  font-size: var(--font-size-sm, 14px);
  font-weight: 600;
  color: var(--color-text, #0F172A);
  margin-bottom: var(--space-2);
}

.auth-field .input-wrapper {
  position: relative;
}

.auth-field .input-wrapper i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted, #94A3B8);
  font-size: 14px;
  pointer-events: none;
  transition: color 0.2s;
}

.auth-field input {
  width: 100%;
  padding: 12px 14px 12px 40px;
  border: 2px solid var(--color-border, #E2E8F0);
  border-radius: var(--radius-lg, 12px);
  font-size: var(--font-size-base, 16px);
  font-family: inherit;
  background: var(--color-bg, #FAFBFC);
  color: var(--color-text, #0F172A);
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

.auth-field input:focus {
  outline: none;
  border-color: var(--color-primary, #2B6BF3);
  box-shadow: 0 0 0 3px rgba(43, 107, 243, 0.1);
}

.auth-field input:focus + i,
.auth-field .input-wrapper:focus-within i {
  color: var(--color-primary, #2B6BF3);
}

.auth-submit {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-lg, 12px);
  background: linear-gradient(135deg, #2B6BF3, #1D39A7);
  color: white;
  font-size: var(--font-size-base, 16px);
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: var(--space-5);
}

.auth-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(43, 107, 243, 0.35);
}

.auth-submit:active {
  transform: translateY(0);
}

.auth-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.auth-submit .spinner-sm {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Error message */
.auth-error {
  display: none;
  padding: 10px 14px;
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.2);
  border-radius: var(--radius-md, 8px);
  color: #DC2626;
  font-size: var(--font-size-sm, 14px);
  margin-bottom: var(--space-4);
  align-items: center;
  gap: 8px;
}

.auth-error.show {
  display: flex;
}

/* Footer */
.auth-footer {
  text-align: center;
  padding: 0 var(--space-6) var(--space-6);
  font-size: var(--font-size-sm, 14px);
  color: var(--color-text-muted, #94A3B8);
}

.auth-footer i {
  color: var(--color-success, #059669);
  margin-right: 4px;
}

/* Mobile */
@media (max-width: 480px) {
  .auth-modal {
    max-width: 100%;
    border-radius: 16px;
  }

  .auth-header {
    padding: var(--space-5) var(--space-5) var(--space-3);
  }

  .auth-tabs {
    margin: 0 var(--space-5);
  }

  .auth-body {
    padding: var(--space-5);
  }

  .auth-footer {
    padding: 0 var(--space-5) var(--space-5);
  }
}