/**
 * Custom User Registration – Front-End Styles
 *
 * Design philosophy: clean, modern, minimal. No external dependencies.
 * Uses CSS custom properties for easy theme integration.
 *
 * @package CUR_Plugin
 * @since   1.0.0
 */

/* ── Custom Properties ──────────────────────────────────────────────────────── */
:root {
  --cur-primary:          #4f46e5;
  --cur-primary-hover:    #4338ca;
  --cur-primary-light:    #ede9fe;
  --cur-surface:          #ffffff;
  --cur-border:           #e2e8f0;
  --cur-border-focus:     #4f46e5;
  --cur-text:             #1e293b;
  --cur-text-muted:       #64748b;
  --cur-error:            #dc2626;
  --cur-error-bg:         #fef2f2;
  --cur-success:          #16a34a;
  --cur-success-bg:       #f0fdf4;
  --cur-warning-bg:       #fffbeb;
  --cur-warning-text:     #92400e;
  --cur-radius:           12px;
  --cur-radius-sm:        8px;
  --cur-shadow:           0 4px 24px rgba(0, 0, 0, 0.08);
  --cur-shadow-focus:     0 0 0 3px rgba(79, 70, 229, 0.18);
  --cur-transition:       0.2s ease;
  --cur-font:             -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

/* ── Wrapper & Card ─────────────────────────────────────────────────────────── */
.cur-wrapper {
  font-family: var(--cur-font);
  max-width: 480px;
  margin: 2rem auto;
  padding: 0 1rem;
  box-sizing: border-box;
}

.cur-card {
  background: var(--cur-surface);
  border: 1px solid var(--cur-border);
  border-radius: var(--cur-radius);
  box-shadow: var(--cur-shadow);
  overflow: hidden;
}

/* ── Card Header ────────────────────────────────────────────────────────────── */
.cur-card__header {
  padding: 2rem 2rem 1.25rem;
  text-align: center;
  background: linear-gradient(135deg, #f8f7ff 0%, #f0f4ff 100%);
  border-bottom: 1px solid var(--cur-border);
}

.cur-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: var(--cur-primary);
  border-radius: 50%;
  margin-bottom: 0.75rem;
  color: #fff;
}

.cur-card__icon svg {
  width: 24px;
  height: 24px;
}

.cur-card__title {
  margin: 0 0 0.25rem !important;
  font-size: 1.375rem !important;
  font-weight: 700 !important;
  color: var(--cur-text) !important;
  line-height: 1.3 !important;
}

.cur-card__subtitle {
  margin: 0 !important;
  font-size: 0.875rem !important;
  color: var(--cur-text-muted) !important;
}

/* ── Messages ───────────────────────────────────────────────────────────────── */
.cur-messages {
  display: none;
  margin: 1rem 2rem 0;
  padding: 0.75rem 1rem;
  border-radius: var(--cur-radius-sm);
  font-size: 0.875rem;
  line-height: 1.5;
}

.cur-messages.cur-messages--error {
  display: block;
  background: var(--cur-error-bg);
  color: var(--cur-error);
  border: 1px solid #fca5a5;
}

.cur-messages.cur-messages--success {
  display: block;
  background: var(--cur-success-bg);
  color: var(--cur-success);
  border: 1px solid #86efac;
}

/* ── Card Body ──────────────────────────────────────────────────────────────── */
.cur-card__body {
  padding: 1.5rem 2rem 2rem;
}

/* ── Form Fields ────────────────────────────────────────────────────────────── */
.cur-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.cur-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.cur-field__label {
  font-size: 0.875rem !important;
  font-weight: 600 !important;
  color: var(--cur-text) !important;
  display: flex !important;
  align-items: center !important;
  gap: 0.2rem !important;
  margin: 0 !important;
}

.cur-required {
  color: var(--cur-error);
}

.cur-field__input {
  width: 100% !important;
  padding: 0.625rem 0.875rem !important;
  font-size: 0.9375rem !important;
  font-family: var(--cur-font) !important;
  color: var(--cur-text) !important;
  background: #fff !important;
  border: 1.5px solid var(--cur-border) !important;
  border-radius: var(--cur-radius-sm) !important;
  outline: none !important;
  transition: border-color var(--cur-transition), box-shadow var(--cur-transition) !important;
  box-sizing: border-box !important;
  margin: 0 !important;
}

.cur-field__input:focus {
  border-color: var(--cur-border-focus) !important;
  box-shadow: var(--cur-shadow-focus) !important;
}

.cur-field__input.cur-field--invalid {
  border-color: var(--cur-error) !important;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12) !important;
}

.cur-field__textarea {
  resize: vertical !important;
  min-height: 100px !important;
}

/* ── Password Toggle ────────────────────────────────────────────────────────── */
.cur-field__password-wrap {
  position: relative;
}

.cur-field__password-wrap .cur-field__input {
  padding-right: 2.75rem !important;
}

.cur-toggle-password {
  position: absolute;
  top: 50%;
  right: 0.75rem;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--cur-text-muted);
  line-height: 1;
  transition: color var(--cur-transition);
}

.cur-toggle-password:hover {
  color: var(--cur-primary);
}

.cur-toggle-password svg {
  width: 18px;
  height: 18px;
  display: block;
}

/* ── Password Strength Meter ────────────────────────────────────────────────── */
.cur-password-strength {
  display: none;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

.cur-password-strength.cur-visible {
  display: flex;
}

.cur-password-strength__bar {
  flex: 1;
  height: 4px;
  background: var(--cur-border);
  border-radius: 999px;
  overflow: hidden;
}

.cur-password-strength__bar span {
  display: block;
  height: 100%;
  border-radius: 999px;
  transition: width 0.3s ease, background 0.3s ease;
  width: 0;
}

.cur-password-strength__label {
  font-size: 0.75rem;
  font-weight: 600;
  min-width: 52px;
  text-align: right;
}

/* Strength states */
.cur-strength--weak   .cur-password-strength__bar span { width: 33%; background: #ef4444; }
.cur-strength--weak   .cur-password-strength__label    { color: #ef4444; }
.cur-strength--fair   .cur-password-strength__bar span { width: 66%; background: #f59e0b; }
.cur-strength--fair   .cur-password-strength__label    { color: #f59e0b; }
.cur-strength--strong .cur-password-strength__bar span { width: 100%; background: #22c55e; }
.cur-strength--strong .cur-password-strength__label    { color: #22c55e; }

/* ── Field Errors ───────────────────────────────────────────────────────────── */
.cur-field__error {
  display: none;
  font-size: 0.8rem;
  color: var(--cur-error);
  line-height: 1.4;
}

.cur-field__error.cur-visible {
  display: block;
}

/* ── Button ─────────────────────────────────────────────────────────────────── */
.cur-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--cur-font);
  border: none;
  border-radius: var(--cur-radius-sm);
  cursor: pointer;
  transition: background-color var(--cur-transition), transform var(--cur-transition), box-shadow var(--cur-transition);
  text-decoration: none;
  white-space: nowrap;
}

.cur-btn:focus-visible {
  outline: 2px solid var(--cur-primary);
  outline-offset: 2px;
}

.cur-btn--primary {
  background: var(--cur-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

.cur-btn--primary:hover:not(:disabled) {
  background: var(--cur-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
}

.cur-btn--primary:active:not(:disabled) {
  transform: translateY(0);
}

.cur-btn--full {
  width: 100%;
  margin-top: 0.5rem;
}

.cur-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

/* Loading spinner inside button */
.cur-btn__spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: cur-spin 0.65s linear infinite;
}

.cur-btn.cur-loading .cur-btn__spinner { display: block; }
.cur-btn.cur-loading .cur-btn__text    { opacity: 0.85; }

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

/* ── Checkbox (Remember me) ─────────────────────────────────────────────────── */
.cur-checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--cur-text-muted);
  cursor: pointer;
  user-select: none;
}

.cur-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.cur-checkbox__mark {
  width: 18px;
  height: 18px;
  min-width: 18px;
  border: 1.5px solid var(--cur-border);
  border-radius: 4px;
  background: #fff;
  transition: background var(--cur-transition), border-color var(--cur-transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.cur-checkbox input:checked ~ .cur-checkbox__mark {
  background: var(--cur-primary);
  border-color: var(--cur-primary);
}

.cur-checkbox input:checked ~ .cur-checkbox__mark::after {
  content: '';
  display: block;
  width: 4px;
  height: 8px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

/* ── Footer row (remember + forgot) ────────────────────────────────────────── */
.cur-form__footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.25rem;
}

.cur-link {
  font-size: 0.875rem;
  color: var(--cur-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--cur-transition);
}

.cur-link:hover {
  color: var(--cur-primary-hover);
  text-decoration: underline;
}

/* ── Notices (for shortcodes) ───────────────────────────────────────────────── */
.cur-notice {
  padding: 0.75rem 1rem;
  border-radius: var(--cur-radius-sm);
  font-size: 0.9rem;
  margin: 1rem 0;
}

.cur-notice--info {
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

.cur-notice--warning {
  background: var(--cur-warning-bg);
  color: var(--cur-warning-text);
  border: 1px solid #fde68a;
}

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 520px) {
  .cur-wrapper {
    margin: 1rem auto;
    padding: 0 0.75rem;
  }

  .cur-card__header {
    padding: 1.5rem 1.25rem 1rem;
  }

  .cur-card__body {
    padding: 1.25rem 1.25rem 1.5rem;
  }

  .cur-messages {
    margin: 0.75rem 1.25rem 0;
  }

  .cur-form__footer-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}