/* ==========================================================================
   PROGRESS OVERLAY
   Matches the index page design system — uses design tokens from _design_tokens.css
   ========================================================================== */

/* Backdrop */
.progress-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(250, 249, 247, 0.92); /* --sl-cream at 92% */
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  visibility: hidden; /* shown by Stimulus: style.visibility = 'visible' */
}

/* --------------------------------------------------------------------------
   Card
   -------------------------------------------------------------------------- */
.po-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 2.5rem 3rem;
  text-align: center;
  max-width: 440px;
  width: 90%;
  opacity: 0;
  animation: po-fade-up 0.45s cubic-bezier(0.4, 0, 0.2, 1) 0.05s forwards;
}

@keyframes po-fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Eyebrow + Headline  (mirrors pc-eyebrow / pc-headline from public_courses.css)
   -------------------------------------------------------------------------- */
.po-eyebrow {
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--sl-teal);
  font-weight: 500;
  font-family: var(--font-sans);
  margin-bottom: 0.625rem;
}

.po-headline {
  font-family: var(--font-serif);
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--sl-charcoal);
  margin-bottom: 1.5rem;
}

.po-headline em {
  font-style: italic;
  color: var(--sl-teal);
}

/* --------------------------------------------------------------------------
   Loading message
   -------------------------------------------------------------------------- */
.progress-message {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--sl-gray);
  margin-bottom: 1.75rem;
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Standalone spinner (no step list — quick, non-generation waits)
   -------------------------------------------------------------------------- */
.po-spinner-standalone {
  display: flex;
  justify-content: center;
}

.po-spinner-standalone .spinner-border {
  color: var(--sl-teal);
  width: 1.5rem;
  height: 1.5rem;
  border-width: 0.15em;
}

/* --------------------------------------------------------------------------
   Step list
   -------------------------------------------------------------------------- */
.po-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

.po-step {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--sl-gray);
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  transition: color 0.2s ease;
  position: relative;
}

.po-step:last-child {
  border-bottom: none;
}

/* Dot indicator (::before — hidden by default, shown on active/done) */
.po-step::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  background: transparent;
  transition: background 0.2s ease, opacity 0.2s ease;
  opacity: 0;
}

/* --------------------------------------------------------------------------
   Step states
   -------------------------------------------------------------------------- */

/* Active: teal text, pulsing teal dot */
.po-step--active {
  color: var(--sl-teal);
  font-weight: 500;
}

.po-step--active::before {
  background: var(--sl-teal);
  opacity: 1;
  animation: po-pulse 1.2s ease-in-out infinite;
}

/* Spinner: styled to match teal palette */
.po-step .spinner-border {
  color: var(--sl-teal);
  width: 0.875rem;
  height: 0.875rem;
  border-width: 0.15em;
  flex-shrink: 0;
}

/* Done: charcoal text, solid teal dot, no spinner */
.po-step--done {
  color: var(--sl-charcoal);
  font-weight: 500;
}

.po-step--done::before {
  background: var(--sl-teal);
  opacity: 1;
  animation: none;
}

/* Pulse animation for active dot */
@keyframes po-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.75); }
}

/* --------------------------------------------------------------------------
   Error state — .po-card--error swaps progress content for error panel
   -------------------------------------------------------------------------- */

.po-card--error .po-headline,
.po-card--error .progress-message,
.po-card--error .po-steps {
  display: none;
}

.po-error {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding-top: 0.5rem;
  animation: po-fade-up 0.35s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.po-card--error .po-error {
  display: flex;
}

.po-error-icon {
  width: 52px;
  height: 52px;
  color: #c97b52;
  animation: po-error-bounce 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) forwards;
}

@keyframes po-error-bounce {
  0%   { transform: scale(0.6); opacity: 0; }
  60%  { transform: scale(1.12); opacity: 1; }
  100% { transform: scale(1); }
}

.po-error-message {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--sl-charcoal);
  line-height: 1.65;
  text-align: center;
  max-width: 300px;
  margin: 0;
}

.po-error-action {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--sl-teal);
  text-decoration: none;
  border: 1.5px solid var(--sl-teal);
  border-radius: var(--radius-full);
  padding: 0.5rem 1.625rem;
  transition: background 0.18s ease, color 0.18s ease;
  margin-top: 0.25rem;
}

.po-error-action:hover,
.po-error-action:focus-visible {
  background: var(--sl-teal);
  color: #fff;
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .po-card {
    animation: none;
    opacity: 1;
  }

  .po-step--active::before {
    animation: none;
  }
}