/* ============================= */
/*        Design tokens          */
/* ============================= */
:root {
  --mp-bg: #0e0e14;
  --mp-surface: #151520;
  --mp-surface-2: #1a1a26;
  --mp-text: #ffffff;
  --mp-muted: rgba(255,255,255,0.72);
  --mp-border: #2c2c3a;
  --mp-primary: #8257e5;
  --mp-primary-dark: #6833c7;
  --mp-focus: #ffd700;
  --mp-success: #1a7a2e;
  --mp-transition: 0.2s ease;
}

/* ============================= */
/*       Acessibilidade          */
/* ============================= */
#skip-link {
  position: absolute;
  left: -9999px;
  z-index: 9999;
  padding: 1rem;
  background-color: #111;
  color: #fff;
  border: 2px solid var(--mp-focus);
  border-radius: .5rem;
  opacity: 0;
}
#skip-link:focus {
  left: 50%;
  transform: translateX(-50%);
  opacity: 1;
}

.mp-playground :focus-visible {
  outline: 3px solid var(--mp-focus) !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.3) !important;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .mp-playground * { animation: none !important; transition: none !important; }
}

/* ============================= */
/*           Layout              */
/* ============================= */
.mp-main {
  padding: 2rem 1rem;
}

.mp-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--mp-text);
  margin-bottom: 0.5rem;
}

.mp-description {
  color: var(--mp-muted);
  font-size: 1rem;
  margin-bottom: 2rem;
  max-width: 56rem;
}

/* ============================= */
/*       Editor LaTeX            */
/* ============================= */
.mp-editor {
  background: var(--mp-surface-2);
  border: 1px solid var(--mp-border);
  border-radius: 1rem;
  overflow: hidden;
}

.mp-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--mp-muted);
  padding: 0.75rem 1rem 0;
}

.mp-field-wrap {
  position: relative;
  overflow-x: auto;
}

.mp-textarea {
  background: var(--mp-surface);
  color: var(--mp-text);
  border: none;
  border-bottom: 1px solid var(--mp-border);
  padding: 1rem;
  font-size: 1rem;
  font-family: 'JetBrains Mono', monospace;
  min-height: 80px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  display: block;
  resize: vertical;
  line-height: 1.6;
}
.mp-textarea::placeholder {
  color: rgba(255,255,255,0.50);
  font-style: italic;
}
.mp-textarea:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--mp-primary);
}
.mp-textarea:focus-visible {
  outline: 3px solid var(--mp-focus) !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.3) !important;
}

.mp-preview {
  background: var(--mp-surface);
  border-bottom: 1px solid var(--mp-border);
  padding: 1rem;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.mp-preview .katex {
  font-size: 1.3rem;
}

/* ============================= */
/*       Faixa de ações          */
/* ============================= */
.mp-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--mp-border);
  flex-wrap: wrap;
}

/* Botões de ação */
.mp-action-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  color: var(--mp-text);
  min-width: 44px;
  min-height: 44px;
  padding: 0.3rem 0.75rem;
  font-size: 0.8rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: background var(--mp-transition), border-color var(--mp-transition);
}
.mp-action-btn .material-symbols-outlined { font-size: 1.1rem; }
.mp-action-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.4);
}

.mp-action-btn[aria-pressed="true"] {
  background: var(--mp-primary);
  border-color: var(--mp-primary);
  color: #fff;
}

.mp-copy-success {
  background: var(--mp-success) !important;
  border-color: var(--mp-success) !important;
  color: #fff !important;
}

.mp-spacer { flex: 1; }

/* ============================= */
/*     Menu de inserção          */
/* ============================= */
.mp-insert-toggle[aria-expanded="true"] {
  background: var(--mp-primary);
  border-color: var(--mp-primary);
  color: #fff;
}

.mp-insert-menu {
  background: var(--mp-surface);
  border-bottom: 1px solid var(--mp-border);
  max-height: 50vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Abas */
.mp-tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--mp-border);
  position: sticky;
  top: 0;
  background: var(--mp-surface);
  z-index: 1;
}

.mp-tab {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--mp-muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.65rem 1rem;
  cursor: pointer;
  min-height: 44px;
  transition: color var(--mp-transition), border-color var(--mp-transition);
}
.mp-tab:hover {
  color: var(--mp-text);
}
.mp-tab--active {
  color: var(--mp-text);
  border-bottom-color: var(--mp-primary);
}

/* Painéis */
.mp-tab-panel {
  padding: 0.75rem 1rem 1rem;
}
.mp-tab-panel--hidden {
  display: none;
}

/* Grupos */
.mp-insert-group {
  margin-bottom: 0.75rem;
}
.mp-insert-group:last-child {
  margin-bottom: 0;
}

.mp-insert-group-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--mp-muted);
  margin: 0.5rem 0 0.4rem 0;
  padding: 0;
}
.mp-insert-group:first-child .mp-insert-group-title {
  margin-top: 0;
}

/* Grid de botões */
.mp-insert-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* Botão base */
.mp-insert-btn {
  background: var(--mp-surface-2);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  color: var(--mp-text);
  min-width: 48px;
  min-height: 48px;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  transition: background var(--mp-transition), border-color var(--mp-transition), box-shadow var(--mp-transition);
}
.mp-insert-btn:hover {
  background: rgba(130, 87, 229, 0.12);
  border-color: var(--mp-primary);
  box-shadow: 0 0 0 1px rgba(130, 87, 229, 0.2);
}

.mp-insert-display {
  font-size: 1.15rem;
  line-height: 1;
}

.mp-insert-label {
  font-size: 0.6rem;
  color: var(--mp-muted);
  line-height: 1.1;
  white-space: nowrap;
}

/* Botão de exemplo (com miniatura KaTeX) */
.mp-insert-btn--example {
  min-width: 90px;
  max-width: 180px;
  padding: 0.5rem 0.7rem;
}

.mp-insert-preview {
  display: block;
  overflow: hidden;
  line-height: 1;
}
.mp-insert-preview .katex,
.mp-insert-preview .katex * {
  font-size: 0.72rem;
  white-space: nowrap;
  color: inherit;
}

/* ============================= */
/*          Saídas                */
/* ============================= */
.mp-output {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--mp-border);
}

.mp-output--text {
  border-top: 3px solid var(--mp-primary);
}

.mp-output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}

.mp-output-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--mp-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.mp-output-label .material-symbols-outlined { font-size: 1rem; }

.mp-output-text {
  display: block;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--mp-text);
}

.mp-output-mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  overflow-wrap: break-word;
}

.mp-placeholder {
  color: rgba(255,255,255,0.50);
  font-style: italic;
}

/* ============================= */
/*       Alto contraste          */
/* ============================= */
@media (prefers-contrast: high) {
  .mp-editor,
  .mp-action-btn,
  .mp-insert-btn {
    border-width: 2px;
    border-color: #fff;
  }
}

@media (forced-colors: active) {
  .mp-action-btn,
  .mp-insert-btn {
    border: 1px solid ButtonText;
  }
  .mp-action-btn:focus-visible,
  .mp-insert-btn:focus-visible {
    outline: 3px solid Highlight;
  }
}

/* ============================= */
/*         Responsivo            */
/* ============================= */
@media (max-width: 767.98px) {
  .mp-textarea { font-size: 0.9rem; min-height: 64px; }
  .mp-actions { gap: 0.25rem; padding: 0.4rem 0.5rem; }
}

@media (max-width: 575.98px) {
  .mp-main { padding: 1.5rem 0.5rem; }
  .mp-title { font-size: 1.5rem; }
  .mp-editor { border-radius: 0.5rem; }
  .mp-output { padding: 0.5rem 0.75rem; }

  /* Saída LaTeX: quebra de linha para expressões longas */
  .mp-output-mono {
    font-size: 0.8rem;
    word-break: break-all;
  }
}