/* Handoff v2: composição editorial sobre os componentes funcionais do painel. */
:root {
  --booknando-red: var(--lm-red); --red-dark: var(--lm-red-hover); --red-hover: var(--lm-red-hover);
  --red-light: var(--lm-red-soft); --red-pale: var(--lm-surface-hover);
  --near-black: var(--lm-ink); --dark-gray: var(--lm-ink-2); --mid-gray: var(--lm-ink-muted);
  --light-gray: var(--lm-line-input); --border: var(--lm-line); --surface: var(--lm-paper-deep);
  --off-white: var(--lm-paper); --white: var(--lm-surface); --placeholder: var(--lm-ink-muted);
  --success: var(--lm-success-ink); --success-light: var(--lm-success-bg);
  --warning: var(--lm-warning-ink); --warning-light: var(--lm-warning-bg);
  --info: var(--lm-info-fg); --info-light: var(--lm-info-bg);
  --radius: var(--lm-radius-lg); --radius-card: var(--lm-radius-2xl); --shadow-card: none;
  --sidebar-w: var(--lm-rail-width); --max-w: var(--lm-content-max);
  --font-display: var(--lm-font-display); --font-ui: var(--lm-font-ui); --font-mono: var(--lm-font-mono);
}
body { font-size: var(--lm-text-base); line-height: var(--lm-leading-body); }
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; letter-spacing: var(--lm-tracking-display); }
h2 { font-size: var(--lm-display-md); margin-bottom: var(--lm-space-4); }
h3 { font-size: var(--lm-summary); }
a { color: var(--lm-red-hover); text-underline-offset: var(--lm-space-1); }
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible { outline: var(--lm-focus); outline-offset: var(--lm-focus-offset); }
.skip-link { position: fixed; top: var(--lm-space-2); left: var(--lm-space-2); z-index: 100; padding: var(--lm-space-3); background: var(--white); transform: translateY(-200%); }
.skip-link:focus { transform: none; }
.sidebar { position: sticky; top: 0; height: 100dvh; overflow-y: auto; background: var(--lm-paper-deep); color: var(--near-black); padding: var(--lm-space-8) var(--lm-space-5); }
.brand-name { color: var(--booknando-red); font-size: var(--lm-display-lg); font-weight: 600; }
.brand-by { font-size: var(--lm-text-sm); color: var(--mid-gray); }
.nav { gap: var(--lm-space-1); }
.nav-group-label { font-size: var(--lm-text-sm); letter-spacing: var(--lm-tracking-label); }
.nav-link { position: relative; min-height: var(--lm-control-lg); font-size: var(--lm-text-base); color: var(--dark-gray); padding: var(--lm-space-3) var(--lm-space-4); }
.nav-link:hover { background: var(--lm-surface-hover); color: var(--near-black); }
.nav-link[aria-current='page'] { color: var(--near-black); background: var(--white); font-weight: 700; box-shadow: var(--lm-shadow-1); }
.nav-link[aria-current='page']::before { content: ''; position: absolute; left: 0; top: var(--lm-space-3); width: 6px; height: var(--lm-space-6); background: var(--booknando-red); clip-path: polygon(0 0,100% 0,100% 100%,50% 78%,0 100%); }
.sidebar-footer { border-color: var(--lm-line-rail); }
.sidebar-footer button { background: none; border: 0; width: 100%; font-family: inherit; cursor: pointer; }
.sidebar-user { display: flex; align-items: center; gap: var(--lm-space-3); margin-block: var(--lm-space-4); overflow-wrap: anywhere; }
.avatar { width: var(--lm-control-md); height: var(--lm-control-md); background: var(--lm-line); color: var(--near-black); font-size: var(--lm-text-sm); flex-shrink: 0; }
.topbar { height: auto; flex-basis: auto; min-height: var(--lm-control-xl); background: transparent; border: 0; padding: var(--lm-space-12) var(--lm-space-12) var(--lm-space-5); flex-wrap: wrap; }
.topbar h1 { font-size: clamp(var(--lm-display-lg), 4vw, var(--lm-display-xl)); font-weight: 500; line-height: var(--lm-leading-snug); }
.topbar-meta { font-size: var(--lm-text-md); }
.content { padding: var(--lm-space-5) var(--lm-space-12) var(--lm-space-12); }
.editorial-summary { font-family: var(--font-display); font-size: var(--lm-summary); line-height: 1.4; color: var(--dark-gray); margin: 0 0 var(--lm-space-8); max-width: 48rem; }
.section-label { font-family: var(--font-ui); font-size: var(--lm-text-sm); letter-spacing: var(--lm-tracking-label); font-weight: 700; }
.btn { min-height: var(--lm-control-lg); height: auto; padding: var(--lm-space-2) var(--lm-space-6); font-size: var(--lm-text-base); border: 1.5px solid var(--lm-line-input); background: var(--white); color: var(--near-black); }
.btn--primary { background: var(--booknando-red); border-color: var(--booknando-red); color: var(--white); font-weight: 700; }
.btn--primary:hover { background: var(--red-hover); border-color: var(--red-hover); }
.btn--secondary:hover, .btn:hover:not(.btn--primary):not(:disabled) { border-color: var(--near-black); background: var(--lm-surface-hover); }
.btn--sm, .btn--link { min-height: var(--lm-control-md); padding: var(--lm-space-2) var(--lm-space-3); font-size: var(--lm-text-md); }
.btn--danger { border-color: var(--red-dark); color: var(--red-dark); }
.btn:disabled, .btn[aria-disabled='true'] { color: var(--mid-gray); background: var(--surface); border-color: var(--border); }
.field { gap: var(--lm-space-2); margin-block: var(--lm-space-4); }
.field label { font-size: var(--lm-text-base); font-weight: 600; }
.field-hint, .form-error, .alert { font-size: var(--lm-text-md); }
.input, .select, .filter-select { min-height: var(--lm-control-xl); height: auto; padding: var(--lm-space-3) var(--lm-space-4); font-size: var(--lm-text-lg); border: 1.5px solid var(--lm-line-input); max-width: 100%; }
.input:focus, .select:focus { border: 1.5px solid var(--near-black); box-shadow: none; outline: var(--lm-focus); outline-offset: var(--lm-focus-offset); }
textarea.input { min-height: 8rem; resize: vertical; }
input[type='checkbox'], input[type='radio'] { accent-color: var(--near-black); min-width: var(--lm-space-5); min-height: var(--lm-space-5); }
.filter-select { min-height: var(--lm-control-md); border-radius: var(--lm-radius-pill); font-size: var(--lm-text-base); }
.card { padding: var(--lm-space-6); }
.card:has(> table) { overflow-x: auto; }
.card-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); }
.turma-card h3 { font-family: var(--font-display); font-size: var(--lm-display-md); }
.turma-card .turma-alunos, .progress-label, .progress-label strong { font-size: var(--lm-text-md); }
.progress-bar { background: var(--near-black); }
thead th { background: var(--white); font-size: var(--lm-text-sm); text-transform: none; letter-spacing: normal; padding: var(--lm-space-4) var(--lm-space-5); }
tbody td { padding: var(--lm-space-4) var(--lm-space-5); border-color: var(--lm-line-soft); }
tbody tr:nth-child(odd) { background: transparent; }
tbody tr:hover { background: var(--lm-surface-hover); }
.badge { font-size: var(--lm-text-sm); font-weight: 700; border-radius: var(--lm-radius-sm); padding: var(--lm-space-1) var(--lm-space-3); }
.badge--erro, .badge--suspended { background: var(--warning-light); color: var(--warning); }
.badge--expired { background: var(--surface); color: var(--dark-gray); }
.tabs { overflow-x: auto; }
.tab { min-height: var(--lm-control-lg); font-size: var(--lm-text-base); border-bottom-width: 3px; white-space: nowrap; }
.modal { max-width: min(95vw, 540px); max-height: 90dvh; overflow-y: auto; }
.modal-header h2 { font-family: var(--font-display); font-size: var(--lm-display-md); }
.modal-close { min-width: var(--lm-control-md); min-height: var(--lm-control-md); }
.login-page { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); padding: 0; align-items: stretch; }
.login-story { align-self: stretch; background: var(--lm-ink); color: var(--lm-surface); padding: var(--lm-space-14); display: flex; flex-direction: column; justify-content: space-between; gap: var(--lm-space-12); }
.login-story .brand-name { color: var(--lm-surface); }
.login-story .brand-by { color: var(--lm-ink-on-dark); }
.login-story__title { font: 500 clamp(var(--lm-display-lg), 4.2vw, var(--lm-display-hero))/var(--lm-leading-tight) var(--font-display); letter-spacing: var(--lm-tracking-display); }
.login-story__copy { color: var(--lm-ink-on-dark); font-size: var(--lm-text-lg); max-width: 28rem; }
.book-spines { display: flex; align-items: end; gap: var(--lm-space-2); height: 150px; }
.book-spines span { display: block; width: var(--lm-space-8); height: 80%; border-radius: var(--lm-radius-xs) var(--lm-radius-xs) 0 0; background: var(--lm-cover-wine); }
.book-spines span:nth-child(2) { height: 65%; background: var(--lm-cover-slate); }
.book-spines span:nth-child(3) { height: 100%; background: var(--lm-paper-deep); }
.book-spines span:nth-child(4) { height: 70%; background: var(--lm-cover-forest); }
.book-spines span:nth-child(5) { height: 90%; background: var(--lm-cover-ochre); }
.login-card { align-self: center; max-width: 500px; padding: var(--lm-space-8); background: transparent; border: 0; }
.login-card h1 { font-size: var(--lm-display-xl); }
.login-card .btn { width: 100%; min-height: var(--lm-control-2xl); }
.inline-create { margin-block: var(--lm-space-6); }
.inline-create > summary { cursor: pointer; font-size: var(--lm-text-lg); font-weight: 700; min-height: var(--lm-control-lg); padding: var(--lm-space-3) 0; }
.inline-create[open] { border-color: var(--near-black); }
.editorial-actions { display: flex; flex-wrap: wrap; gap: var(--lm-space-3); margin-bottom: var(--lm-space-6); }
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(190px,100%), 1fr)); gap: var(--lm-space-6); list-style: none; padding: 0; }
.book-cover { aspect-ratio: 3 / 4; padding: var(--lm-space-6); display: flex; flex-direction: column; justify-content: space-between; background: var(--lm-cover-navy); color: var(--lm-surface); border-radius: var(--lm-radius-book); box-shadow: var(--lm-shadow-book); overflow-wrap: anywhere; text-decoration: none; }
.book-cover strong { font: 500 var(--lm-display-md)/1.15 var(--font-display); }
.book-cover span { font: 400 var(--lm-text-sm) var(--font-mono); }
.book-cover:has(img) { padding: 0; }
.book-cover img { width: 100%; height: 100%; object-fit: contain; border-radius: inherit; }
.book-grid > li:nth-child(3n+2) .book-cover { background: var(--lm-cover-forest); }
.book-grid > li:nth-child(3n) .book-cover { background: var(--lm-cover-wine); }
.book-grid h3 { font: 600 var(--lm-text-lg) var(--font-ui); margin-block: var(--lm-space-4) var(--lm-space-2); }
@media (max-width: 900px) {
  .sidebar { position: static; height: auto; width: 100%; padding: var(--lm-space-3); flex-wrap: wrap; overflow: visible; }
  .sidebar .brand { padding: 0 var(--lm-space-2); }
  .sidebar .nav { flex-basis: 100%; flex-direction: row; flex-wrap: wrap; }
  .sidebar-footer { display: block; margin-left: auto; border: 0; padding: 0; }
  .sidebar-user { display: none; }
  .topbar { padding: var(--lm-space-6) var(--lm-space-4) var(--lm-space-3); }
  .content { padding: var(--lm-space-4); }
  .login-story { padding: var(--lm-space-8); }
}
@media (max-width: 600px) {
  .login-page { grid-template-columns: 1fr; }
  .login-story { gap: var(--lm-space-4); padding: var(--lm-space-6); }
  .login-story__title { font-size: var(--lm-display-lg); margin: 0; }
  .book-spines, .login-story__copy { display: none; }
  .login-card { max-width: 100%; padding: var(--lm-space-6); }
  .card { padding: var(--lm-space-4); }
  .editor-grid { grid-template-columns: minmax(0, 1fr); }
  .modal-actions { flex-wrap: wrap; }
}
/* Recolher remove o menu da navegação por teclado e libera toda sua largura. */
.sidebar[hidden] { display: none; }
.sidebar-collapsed .content { max-width: none; }
.sidebar-toggle { position: fixed; top: 36px; left: calc(var(--sidebar-w) - 22px); z-index: 20; width: 44px; height: 44px; padding: 0; display: grid; place-items: center; border: 0; background: transparent; color: var(--lm-ink-2); cursor: pointer; flex-shrink: 0; border-radius: 50%; }
.sidebar-toggle::before { content: ''; position: absolute; inset: 7px; border: 1px solid var(--lm-line-input); border-radius: 50%; background: var(--lm-surface); box-shadow: var(--lm-shadow-1); }
.sidebar-toggle:hover::before { background: var(--lm-paper-deep); border-color: var(--lm-ink); }
.sidebar-toggle:focus-visible { outline: var(--lm-focus); outline-offset: 2px; }
.sidebar-toggle-icon { position: relative; width: 18px; height: 18px; transition: transform 150ms ease; }
.sidebar-toggle[aria-expanded='false'] .sidebar-toggle-icon { transform: rotate(180deg); }
.sidebar-collapsed .sidebar-toggle { left: 4px; }
.sidebar-collapsed .topbar { padding-left: 60px; }
@media (max-width: 900px) {
  .sidebar-toggle { position: relative; top: auto; left: auto; }
  .sidebar-collapsed .sidebar-toggle { left: auto; }
  .sidebar-collapsed .topbar { padding-left: var(--lm-space-4); }
}
@media (prefers-reduced-motion: reduce) { .sidebar-toggle-icon { transition: none; } }
[data-upload-progress] { display: block; width: min(100%, 34rem); height: 20px; accent-color: var(--booknando-red); }
[data-upload-selected], [data-upload-status] { overflow-wrap: anywhere; }
[data-upload-feedback][hidden] { display: none; }
.editor-page-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.editor-page-nav .btn { padding: 0; width: 36px; height: 36px; min-height: 36px; display: grid; place-items: center; flex: 0 0 36px; }
.editor-page-nav .input.editor-page-number { width: 72px; max-width: 72px; min-height: 36px; height: 36px; padding: 4px 8px; flex: 0 0 72px; }
.editor-page-nav label, .editor-page-nav #page-count { margin: 0; white-space: nowrap; }
.editor-page-nav small { color: var(--lm-ink-2); font-size: 12px; }
.editor-toc #toc-list { max-height: 260px; overflow-y: auto; margin-top: 12px; }
.editor-toc .toc-entry { display: block; width: 100%; padding: 8px; border: 0; border-radius: 4px; background: transparent; color: var(--lm-ink); text-align: left; font: inherit; font-size: 14px; cursor: pointer; overflow-wrap: anywhere; }
.editor-toc .toc-entry:hover { background: var(--lm-paper-deep); }
.editor-toc .toc-entry:focus-visible { outline: var(--lm-focus); outline-offset: -2px; }
.editor-save-feedback { padding: 12px; margin-top: 12px; border: 1px solid currentColor; border-radius: 8px; overflow-wrap: anywhere; color: var(--lm-ink); background: var(--lm-paper-deep); }
.editor-save-feedback[hidden] { display: none; }
.editor-save-feedback[data-state='success'] { color: var(--lm-success-ink); background: var(--lm-success-bg); }
.editor-save-feedback[data-state='error'] { color: var(--lm-red); background: var(--lm-surface); }
/* Oculta apenas o trilho visual; o menu continua rolável e acessível. */
.sidebar { scrollbar-width: none; }
.sidebar::-webkit-scrollbar { width: 0; height: 0; }
.action-feedback { position: fixed; right: 24px; bottom: 24px; z-index: 1000; width: min(420px, calc(100vw - 32px)); padding: 16px 52px 16px 16px; border: 1px solid currentColor; border-radius: 12px; box-shadow: var(--lm-shadow-1); color: var(--lm-success-ink); background: var(--lm-success-bg); }
.action-feedback p { margin: 0; overflow-wrap: anywhere; }
.action-feedback p:empty { display: none; }
.action-feedback[data-state='error'] { color: var(--lm-red-hover); background: var(--lm-surface); border-left-width: 5px; }
.action-feedback[data-state='loading'] { color: var(--lm-ink); background: var(--lm-paper-deep); }
.action-feedback button { position: absolute; right: 4px; top: 4px; width: 40px; height: 40px; border: 0; background: transparent; color: inherit; font-size: 24px; cursor: pointer; }