:root {
  --bg: #07111f;
  --panel: rgba(11, 22, 38, 0.88);
  --panel-2: rgba(17, 30, 51, 0.95);
  --card: rgba(15, 24, 40, 0.95);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(79, 209, 255, 0.28);
  --text: #f5f7fb;
  --muted: #9aa8bf;
  --cyan: #44d9ff;
  --cyan-2: #22b8ff;
  --violet: #7c5cff;
  --success: #33d17a;
  --warning: #ffb84d;
  --danger: #ff6b81;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: Inter, Arial, Helvetica, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(68, 217, 255, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(124, 92, 255, 0.12), transparent 26%),
    linear-gradient(180deg, #06101b 0%, #07111f 50%, #050c16 100%);
  color: var(--text);
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

textarea {
  resize: vertical;
}

/* ── Layout override: esta vista usa columna de sidebar ligeramente más ancha ─── */
.admin-layout {
  grid-template-columns: 280px 1fr;
}

/* ── El main-content en esta vista tiene su propio padding ───────────────── */
.admin-layout .main-content {
  padding: 32px;
}

.topbar {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.breadcrumb a {
  color: var(--cyan);
}

.topbar-actions {
  position: relative;
  z-index: 10;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  position: relative;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 18px;
  border-radius: 14px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: 0.25s ease;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.64;
  cursor: wait;
}

.btn.is-loading {
  opacity: 0.72;
  cursor: wait;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--cyan-2));
  color: #04101d;
  box-shadow: 0 12px 35px rgba(34, 184, 255, 0.22);
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.btn-block {
  width: 100%;
}

.overlay,
.sidebar::before,
.sidebar::after {
  pointer-events: none;
}

.hero-card {
  padding: 28px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at top right, rgba(68, 217, 255, 0.08), transparent 24%),
    linear-gradient(180deg, rgba(17, 30, 51, 0.95) 0%, rgba(10, 18, 31, 0.98) 100%);
  box-shadow: var(--shadow);
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  font-weight: 700;
}

.hero-card__header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
}

.hero-card__header h1 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.04;
}

.hero-description {
  margin: 14px 0 0;
  max-width: 850px;
  color: var(--muted);
  line-height: 1.75;
}

.hero-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.badge--dark {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) 380px;
  gap: 22px;
}

.main-column,
.side-column {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.panel {
  padding: 24px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel__header {
  margin-bottom: 20px;
}

.panel__header--between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.panel-label {
  margin: 0 0 10px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  font-weight: 700;
}

.panel__header h2 {
  margin: 0;
  font-size: 1.35rem;
}

.panel-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field--full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 600;
}

.field input,
.field select,
.field textarea {
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  outline: none;
  padding: 12px 14px;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 4px rgba(68, 217, 255, 0.08);
}

.field textarea {
  min-height: 130px;
}

.textarea-xl {
  min-height: 240px !important;
}

/* fix visual dropdown */
.field select option,
select option {
  background: #0f1726;
  color: #f5f7fb;
}

.block-toggles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.toggle-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.toggle-card:hover {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
}

.toggle-card:has(input:checked) {
  border-color: rgba(68, 217, 255, 0.32);
  background: rgba(68, 217, 255, 0.07);
  box-shadow: 0 0 0 1px rgba(68, 217, 255, 0.12);
}

.toggle-card:has(input:checked) strong {
  color: var(--cyan);
}

.toggle-card input {
  margin-top: 3px;
  accent-color: var(--cyan);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.toggle-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.95rem;
  transition: color 0.18s ease;
}

.toggle-card small {
  display: block;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.88rem;
}

.questions-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.question-card {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.025) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.question-card__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.question-card__head h3 {
  margin: 0;
  font-size: 1rem;
}

.remove-question-btn {
  border: 1px solid rgba(255, 107, 129, 0.24);
  background: rgba(255, 107, 129, 0.12);
  color: #ff9cae;
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.summary-box,
.action-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.summary-item,
.active-blocks,
.action-box {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.summary-item span {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.summary-item strong {
  font-size: 1rem;
}

.active-block-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(68, 217, 255, 0.12);
  border: 1px solid rgba(68, 217, 255, 0.18);
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
  margin: 4px 6px 0 0;
  box-shadow: 0 8px 20px rgba(34, 184, 255, 0.08);
}

.muted {
  color: var(--muted);
  margin: 0;
}

.form-message {
  margin-top: 4px;
  padding: 14px 16px;
  border-radius: 14px;
  font-weight: 600;
}

.form-message.success {
  background: rgba(51, 209, 122, 0.12);
  color: #81f2b0;
  border: 1px solid rgba(51, 209, 122, 0.2);
}

.form-message.error {
  background: rgba(255, 107, 129, 0.12);
  color: #ff9cae;
  border: 1px solid rgba(255, 107, 129, 0.2);
}

.hidden {
  display: none !important;
}

/* Tabs */
.lesson-tabs__nav {
  display: flex;
  gap: 4px;
  padding: 5px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.lesson-tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.lesson-tab-btn:hover:not(.lesson-tab-btn--active) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.lesson-tab-btn--active {
  background: rgba(68, 217, 255, 0.12);
  color: var(--cyan);
  border-color: rgba(68, 217, 255, 0.22);
}

.lesson-tab-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
  transition: background 0.18s ease;
}

.lesson-tab-btn--active .lesson-tab-num {
  background: rgba(68, 217, 255, 0.2);
}

.lesson-tab-pane {
  display: none;
  flex-direction: column;
  gap: 22px;
}

.lesson-tab-pane--active {
  display: flex;
}

.tab-footer {
  margin-top: 20px;
  display: flex;
  justify-content: flex-end;
}

/* Sticky side column */
.side-column {
  position: sticky;
  top: 24px;
  align-self: start;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  scrollbar-width: none;
}

.side-column::-webkit-scrollbar {
  display: none;
}

/* skeleton */
.lesson-skeleton {
  display: grid;
  gap: 18px;
}

.lesson-skeleton.hidden {
  display: none;
}

.lesson-skeleton__hero {
  height: 170px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.05);
}

.lesson-skeleton__grid {
  display: grid;
  grid-template-columns: 1.8fr 0.9fr;
  gap: 18px;
}

.lesson-skeleton__main,
.lesson-skeleton__side {
  display: grid;
  gap: 18px;
}

.lesson-skeleton__card {
  min-height: 240px;
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.05);
}

.shimmer {
  position: relative;
  overflow: hidden;
}

.shimmer::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.08) 45%,
    rgba(255, 255, 255, 0.18) 50%,
    rgba(255, 255, 255, 0.08) 55%,
    transparent 100%
  );
  animation: shimmerMove 1.3s infinite;
}

@keyframes shimmerMove {
  100% {
    transform: translateX(100%);
  }
}

/* debug panel premium */
.debug-panel {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: min(420px, calc(100vw - 32px));
  max-height: 70vh;
  z-index: 9999;
  border-radius: 22px;
  border: 1px solid rgba(255, 120, 120, 0.18);
  background: rgba(34, 11, 17, 0.92);
  backdrop-filter: blur(14px);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.debug-panel.hidden {
  display: none;
}

.debug-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.debug-panel__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.debug-panel__body {
  padding: 14px 16px;
  display: grid;
  gap: 12px;
  max-height: calc(70vh - 62px);
  overflow: auto;
}

.debug-event {
  border-radius: 16px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.debug-event--warn {
  border-color: rgba(255, 204, 102, 0.2);
}

.debug-event--error {
  border-color: rgba(255, 120, 120, 0.22);
}

.debug-event__head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 13px;
}

.debug-event pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 12px;
  line-height: 1.45;
  opacity: 0.9;
}

#pageContent.hidden {
  display: none;
}

@media (max-width: 1280px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .side-column {
    position: static;
    max-height: none;
    overflow-y: visible;
  }
}

@media (max-width: 980px) {
  .admin-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
    overflow-y: visible;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .topbar,
  .hero-card__header,
  .panel__header--between,
  .debug-panel__head {
    flex-direction: column;
    align-items: stretch;
  }

  .form-grid,
  .block-toggles,
  .options-grid,
  .lesson-skeleton__grid {
    grid-template-columns: 1fr;
  }

  .debug-panel {
    right: 16px;
    left: 16px;
    width: auto;
    bottom: 16px;
  }
}

@media (max-width: 680px) {
  .admin-layout .main-content {
    padding: 18px;
  }
}

/* ── Barra de estado de guardado ─────────────────────────────────────────── */
.save-state-bar {
  display: none; /* oculta en estado "clean" */
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 12px;
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 14px;
  transition: background 0.3s ease, color 0.3s ease;
}

.save-state-bar[data-state="dirty"] {
  display: flex;
  background: rgba(255, 184, 77, 0.12);
  color: var(--warning);
  border: 1px solid rgba(255, 184, 77, 0.22);
}

.save-state-bar[data-state="saving"] {
  display: flex;
  background: rgba(68, 217, 255, 0.08);
  color: var(--cyan);
  border: 1px solid rgba(68, 217, 255, 0.16);
}

.save-state-bar[data-state="saved"] {
  display: flex;
  background: rgba(51, 209, 122, 0.1);
  color: var(--success);
  border: 1px solid rgba(51, 209, 122, 0.18);
}

.save-state-bar[data-state="error"] {
  display: flex;
  background: rgba(255, 107, 129, 0.1);
  color: var(--danger);
  border: 1px solid rgba(255, 107, 129, 0.2);
}

.save-state__indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

/* ── Errores de campo ─────────────────────────────────────────────────────── */
.field--error > input,
.field--error > select,
.field--error > textarea {
  border-color: rgba(255, 107, 129, 0.55) !important;
  box-shadow: 0 0 0 3px rgba(255, 107, 129, 0.12) !important;
}

.field-error-msg {
  display: block;
  color: var(--danger);
  font-size: 0.8rem;
  margin-top: 4px;
}

/* ── Hints y etiquetas de campo ───────────────────────────────────────────── */
.field-hint {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 4px;
  line-height: 1.4;
}

.field-required {
  color: var(--danger);
  margin-left: 2px;
}

/* ── Bloque de advertencias del resumen lateral ───────────────────────────── */
.summary-warnings {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 2px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.summary-warning {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--warning);
}

.summary-warning::before {
  content: "⚠";
  font-size: 0.75rem;
}

.summary-ok {
  font-size: 0.82rem;
  color: var(--success);
  display: flex;
  align-items: center;
  gap: 6px;
}

.summary-ok::before {
  content: "✓";
}

/* ── Fallback JS para toggle-card cuando :has() no está disponible ───────── */
.toggle-card--checked {
  border-color: rgba(68, 217, 255, 0.32) !important;
  background: rgba(68, 217, 255, 0.07) !important;
  box-shadow: 0 0 0 1px rgba(68, 217, 255, 0.12) !important;
}

.toggle-card--checked strong {
  color: var(--cyan);
}