/* ==========================================================================
   Modal shell, sandbox terminal, viewport switcher, device carousel
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(20, 17, 14, 0.55);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-film);
}

.modal-backdrop.is-open {
  opacity: 1;
}

.modal {
  width: min(920px, 100%);
  max-height: min(88vh, 820px);
  background: var(--surface-1);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-tablet-hover);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  translate: 0 8px;
  transition: translate var(--dur-base) var(--ease-film);
}

.modal-backdrop.is-open .modal {
  translate: 0 0;
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-hairline);
}

.modal__title {
  margin: 0;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.modal__close {
  background: transparent;
  border: 1px solid var(--border-hairline-strong);
  border-radius: 50%;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
}

.modal__close:hover {
  border-color: var(--accent-terracotta);
  color: var(--accent-terracotta-text);
}

.modal__tabs {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-5) 0;
  border-bottom: 1px solid var(--border-hairline);
}

.modal__tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: var(--space-2) var(--space-3) var(--space-3);
  font-size: var(--fs-small);
  color: var(--ink-2);
  cursor: pointer;
}

.modal__tab[aria-selected="true"] {
  color: var(--accent-terracotta-text);
  border-bottom-color: var(--accent-terracotta);
}

.modal__body {
  padding: var(--space-5);
  overflow-y: auto;
  flex: 1;
}

/* --- Python sandbox --- */
.sandbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}

.sandbox-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--ink-2);
}

.sandbox-status__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--ink-2);
}

.sandbox-status[data-state="loading"] .sandbox-status__dot {
  background: var(--accent-brass);
  animation: pulse 1.1s ease-in-out infinite;
}

.sandbox-status[data-state="ready"] .sandbox-status__dot {
  background: var(--accent-olive);
}

.sandbox-status[data-state="error"] .sandbox-status__dot {
  background: var(--accent-terracotta);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.code-editor {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  background: var(--surface-2);
  color: var(--ink-0);
  border: 1px solid var(--border-hairline-strong);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.55;
  tab-size: 4;
}

.terminal {
  margin-top: var(--space-4);
  background: #211d1a;
  color: #e8dfc9;
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  max-height: 240px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal .err {
  color: #d98a70;
}
.terminal .ok {
  color: #b7bd93;
}

/* --- Web viewport preview --- */
.viewport-switcher {
  display: flex;
  gap: var(--space-2);
}

.viewport-switcher button {
  border: 1px solid var(--border-hairline-strong);
  background: var(--surface-1);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.7rem;
  font-size: var(--fs-micro);
  cursor: pointer;
}

.viewport-switcher button[aria-pressed="true"] {
  background: var(--accent-brass);
  /* Fixed dark ink, not #fbf6ec white — white-on-brass only hits 2.9:1,
     well under WCAG AA. See PHASE.md Phase 6. */
  color: var(--ink-on-accent);
  border-color: var(--accent-brass);
}

.viewport-frame {
  margin-top: var(--space-4);
  border: 1px solid var(--border-hairline-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface-2);
  transition: max-width var(--dur-base) var(--ease-film);
  margin-inline: auto;
}

.viewport-frame iframe {
  width: 100%;
  height: 520px;
  border: 0;
  background: #fff;
  display: block;
}

.viewport-frame[data-size="desktop"] {
  max-width: 100%;
}
.viewport-frame[data-size="tablet"] {
  max-width: 768px;
}
.viewport-frame[data-size="mobile"] {
  max-width: 375px;
}

.viewport-fallback {
  padding: var(--space-6);
  text-align: center;
  color: var(--ink-2);
}

/* --- Device screenshot carousel --- */
.carousel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.carousel__controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.carousel__controls button {
  background: transparent;
  border: 1px solid var(--border-hairline-strong);
  border-radius: 50%;
  width: 2.25rem;
  height: 2.25rem;
  cursor: pointer;
}

.carousel__caption {
  font-size: var(--fs-small);
  color: var(--ink-2);
  text-align: center;
  max-width: 40ch;
}

@media (max-width: 640px) {
  .modal {
    max-height: 94vh;
  }
  .viewport-frame[data-size="tablet"],
  .viewport-frame[data-size="desktop"] {
    max-width: 100%;
  }
}