@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,300;0,400;0,500;0,700;1,400&family=Rajdhani:wght@300;400;500;600;700&family=Exo+2:ital,wght@0,200;0,300;0,400;0,600;1,300&display=swap');

/* ═══════════════════════════════════════
   CSS VARIABLES — CUSTOMIZABLE BY SETTINGS
   ═══════════════════════════════════════ */
:root {
  /* NEXUS SYSTEM — backgrounds */
  /* ── BACKGROUNDS — Preto Vidro ──
     Escala neutra quase sem hue.
     Temperatura levíssima (< 5% azul) para não parecer preto absoluto
     mas contrastar perfeitamente com texto branco e accent cyan.
  */
  --bg-void:      #080909;   /* preto absoluto com micro-tint frio */
  --bg-deep:      #0d0f10;   /* base de todos os painéis */
  --bg-surface:   #111415;   /* editor textarea */
  --bg-panel:     #161a1b;   /* toolbar, header, symbol panel */
  --bg-elevated:  #1c2022;   /* cards elevados, color-tools */
  --bg-card:      #222628;   /* inputs, modais */

  --border-dim:   rgba(140,200,230,0.09);
  --border-mid:   rgba(140,200,230,0.20);
  --border-bright:rgba(140,200,230,0.48);
  --border-active:rgba(56,200,240,0.80);

  /* Cyan / blue accent */
  --cyan-dim:     #0a4a5a;
  --cyan-mid:     #1a9ec0;          /* ← mais brilhante que antes */
  --cyan-base:    #38c8f0;          /* ← azul claro brilhante, ativo */
  --cyan-bright:  #72dcf8;
  --cyan-glow:    rgba(56,200,240,0.18);
  --cyan-glow2:   rgba(56,200,240,0.08);

  /* Amber — mais quente e brilhante */
  --amber:        #ffc233;          /* ← ouro claro, não laranja opaco */
  --amber-dim:    rgba(255,194,51,0.18);

  /* Alerts */
  --red-alert:    #ff5555;
  --red-dim:      rgba(255,85,85,0.18);

  /* Green — mais vibrante */
  --green-ok:     #3dffa0;          /* ← verde-água brilhante */

  /* ── UI TEXT — hierarquia branca ──
     primary  = quase branco     → labels, valores, texto ativo
     secondary = branco médio    → texto de suporte, botões inativos
     muted    = cinza-azulado    → rótulos, metadados
     ghost    = escuro, só para dividers e placeholders
  */
  --text-primary:   #f0f6fa;        /* ← quase branco */
  --text-secondary: #b8d0dc;        /* ← legível e claro */
  --text-muted:     #7aaabb;        /* ← visível, não apagado */
  --text-ghost:     #3a6878;        /* ← só onde faz sentido ser discreto */

  --font-mono:    'JetBrains Mono', monospace;
  --font-ui:      'Rajdhani', sans-serif;
  --font-body:    'Exo 2', sans-serif;
  --header-h:     48px;
  --tabs-h:       38px;
  --toolbar-h:    42px;
  --statusbar-h:  28px;
  --collapse-w:   28px;
  --transition:   all 0.22s cubic-bezier(0.4,0,0.2,1);

  /* ─────────────────────────────────────────────
     PALETA DEFINIDA — Dark/Light por tabela
     ───────────────────────────────────────────── */

  /* Headings dark */
  --h1-color: rgb(0,255,15);
  --h1-bg:    transparent;
  --h2-color: rgb(255,255,255);
  --h2-bg:    transparent;
  --h3-color: rgb(0,75,255);
  --h3-bg:    transparent;
  --h4-color: rgb(0,230,15);
  --h4-bg:    transparent;
  --h5-color: rgb(255,235,0);
  --h5-bg:    transparent;
  --h6-color: rgb(255,135,0);
  --h6-bg:    transparent;

  /* Tamanhos */
  --h1-size: 1.9em; --h2-size: 1.55em; --h3-size: 1.25em;
  --h4-size: 1.08em; --h5-size: 1em; --h6-size: 0.9em;
  --p-size: 15px; --quote-size: 14px;
  --p-color:    rgb(255,255,255);
  --link-color: rgb(0,75,255);

  /* Código inline */
  --code-inline-color: rgb(225,15,15);
  --code-inline-bg:    rgb(20,20,20);

  /* LaTeX */
  --latex-inline-color: rgb(40,60,255);
  --latex-inline-bg:    transparent;
  --latex-block-color:  rgb(40,60,255);
  --latex-block-bg:     rgb(20,20,20);
  --latex-block-border: rgb(40,60,255);

  /* Citação */
  --quote-color:  rgb(0,255,5);
  --quote-bg:     rgb(10,40,30);
  --quote-border: rgb(0,255,15);

  /* Código bloco */
  --code-block-bg:     rgb(20,20,20);
  --code-block-border: rgb(0,255,15);

  /* Tabela */
  --table-header-bg: rgb(0,125,50);

  /* HR */
  --hr-color: rgb(255,255,255); --hr-thickness: 1px; --hr-style: solid;

  /* Espaçamento */
  --spacing-horizontal: 0;
  --spacing-vertical:   1.75;
  --word-spacing:       0;
  --margins:            20px;
  --text-align:         left;

  /* Fonte e zoom */
  --preview-font: Georgia, serif;
  --a4-zoom: 0.9;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;background:var(--bg-void);color:var(--text-primary);font-family:var(--font-body);font-size:14px;overflow:hidden;}

/* scanline removida — sem efeito de tecido */
.bracket-corner{position:fixed;width:20px;height:20px;pointer-events:none;z-index:9998;}
.bracket-corner.tl{top:8px;left:8px;border-top:2px solid var(--border-bright);border-left:2px solid var(--border-bright);}
.bracket-corner.tr{top:8px;right:8px;border-top:2px solid var(--border-bright);border-right:2px solid var(--border-bright);}
.bracket-corner.bl{bottom:8px;left:8px;border-bottom:2px solid var(--border-bright);border-left:2px solid var(--border-bright);}
.bracket-corner.br{bottom:8px;right:8px;border-bottom:2px solid var(--border-bright);border-right:2px solid var(--border-bright);}

/* ── HEADER ── */
#app-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:var(--bg-deep);border-bottom:1px solid var(--border-mid);display:flex;align-items:center;padding:0 14px;gap:12px;z-index:1000;box-shadow:0 1px 24px rgba(0,0,0,0.6);}
.header-logo{display:flex;align-items:center;gap:9px;flex-shrink:0;}
.logo-glyph{font-size:21px;color:var(--cyan-base);filter:drop-shadow(0 0 8px var(--cyan-base));}
.logo-text{font-family:var(--font-ui);font-weight:700;font-size:15px;letter-spacing:4px;color:var(--cyan-base);text-shadow:0 0 12px var(--cyan-base);}
.logo-sub{font-family:var(--font-mono);font-size:8px;color:var(--text-muted);letter-spacing:2px;text-transform:uppercase;margin-top:2px;}
.header-sep{width:1px;height:22px;background:var(--border-mid);flex-shrink:0;}
.header-tag{font-family:var(--font-mono);font-size:9px;letter-spacing:2px;color:var(--text-secondary);text-transform:uppercase;padding:3px 7px;border:1px solid var(--border-mid);border-radius:2px;white-space:nowrap;}
.header-spacer{flex:1;}
#header-status{font-family:var(--font-mono);font-size:10px;color:var(--text-secondary);letter-spacing:1px;display:flex;align-items:center;gap:6px;white-space:nowrap;}
.status-dot{width:6px;height:6px;border-radius:50%;background:var(--green-ok);box-shadow:0 0 6px var(--green-ok);animation:pulse-dot 2s ease-in-out infinite;}
@keyframes pulse-dot{0%,100%{opacity:1;}50%{opacity:.4;}}

.panel-toggles{display:flex;gap:3px;align-items:center;}
.ptog-btn{display:flex;align-items:center;gap:5px;background:transparent;border:1px solid var(--border-mid);color:var(--text-secondary);font-family:var(--font-mono);font-size:9px;letter-spacing:1.5px;text-transform:uppercase;padding:4px 8px;cursor:pointer;transition:var(--transition);border-radius:2px;}
.ptog-btn:hover{border-color:var(--border-bright);color:var(--text-primary);}
.ptog-btn.active{border-color:var(--cyan-base);color:var(--cyan-base);background:var(--cyan-glow);font-weight:600;}
.ptog-dot{width:5px;height:5px;border-radius:50%;background:currentColor;}

.hdr-btn{display:flex;align-items:center;gap:6px;background:transparent;border:1px solid var(--border-mid);color:var(--text-secondary);font-family:var(--font-mono);font-size:9px;letter-spacing:1.5px;text-transform:uppercase;padding:5px 10px;cursor:pointer;transition:var(--transition);border-radius:2px;white-space:nowrap;}
.hdr-btn:hover{border-color:var(--border-bright);color:var(--text-primary);background:var(--cyan-glow2);}
.hdr-btn.amber{border-color:rgba(255,194,51,0.35);color:var(--amber);}
.hdr-btn.amber:hover{background:var(--amber-dim);border-color:var(--amber);color:var(--amber);}

.btn-save-main{display:flex;align-items:center;gap:7px;background:transparent;border:1px solid var(--cyan-base);color:var(--cyan-base);font-family:var(--font-ui);font-weight:700;font-size:11px;letter-spacing:2px;text-transform:uppercase;padding:7px 16px;cursor:pointer;transition:var(--transition);position:relative;overflow:hidden;clip-path:polygon(7px 0%,100% 0%,calc(100% - 7px) 100%,0% 100%);white-space:nowrap;}
.btn-save-main::before{content:'';position:absolute;inset:0;background:var(--cyan-base);opacity:0;transition:var(--transition);}
.btn-save-main:hover{color:var(--bg-void);box-shadow:0 0 24px rgba(56,200,240,0.4);}
.btn-save-main:hover::before{opacity:1;}
.btn-save-main>*{position:relative;z-index:1;}

/* ── TABS ── */
#tabs-row{position:fixed;top:var(--header-h);left:0;right:0;height:var(--tabs-h);background:var(--bg-deep);border-bottom:1px solid var(--border-dim);display:flex;align-items:center;padding:0 8px;gap:2px;overflow-x:auto;overflow-y:hidden;z-index:999;}
#tabs-row::-webkit-scrollbar{height:2px;}
#tabs-row::-webkit-scrollbar-thumb{background:var(--border-mid);}
.tab-btn{display:flex;align-items:center;gap:6px;background:transparent;border:1px solid transparent;border-bottom:2px solid transparent;color:var(--text-muted);font-family:var(--font-mono);font-size:10px;letter-spacing:1px;padding:5px 12px;cursor:pointer;white-space:nowrap;transition:var(--transition);flex-shrink:0;}
.tab-btn:hover{color:var(--text-primary);background:var(--cyan-glow2);}
.tab-btn.active{color:var(--text-primary);border-bottom-color:var(--cyan-base);background:var(--cyan-glow2);font-weight:600;}
.tab-icon{font-size:9px;opacity:.7;}
.tab-close-x{font-size:9px;opacity:.5;padding:1px 2px;border-radius:2px;line-height:1;}
.tab-close-x:hover{opacity:1;color:var(--red-alert);}
.add-tab-btn{background:transparent;border:1px solid var(--border-mid);color:var(--text-muted);width:24px;height:24px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:14px;transition:var(--transition);border-radius:2px;flex-shrink:0;margin-left:4px;}
.add-tab-btn:hover{border-color:var(--border-bright);color:var(--text-primary);}

/* ── TOOLBAR ── */
#toolbar{position:fixed;left:0;right:0;height:var(--toolbar-h);background:var(--bg-panel);border-bottom:1px solid var(--border-mid);display:flex;align-items:center;padding:0 6px;gap:1px;overflow-x:auto;overflow-y:hidden;z-index:998;}
#toolbar{top:calc(var(--header-h) + var(--tabs-h));}
#toolbar::-webkit-scrollbar{height:2px;}
#toolbar::-webkit-scrollbar-thumb{background:var(--border-mid);}
.tb-sep{width:1px;height:20px;background:var(--border-mid);margin:0 4px;flex-shrink:0;}
.tb-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;background:transparent;border:1px solid transparent;color:var(--text-secondary);font-family:var(--font-mono);font-size:11px;cursor:pointer;transition:var(--transition);border-radius:4px;white-space:nowrap;flex-shrink:0;}
.tb-btn:hover{background:var(--cyan-glow);border-color:var(--border-bright);color:var(--text-primary);}
.tb-btn:active{transform:scale(.93);}
.tb-btn.amber{color:var(--amber);border-color:var(--amber-dim);}
.tb-btn.amber:hover{background:var(--amber-dim);border-color:var(--amber);color:var(--amber);}
.tb-btn.green{color:var(--green-ok);font-size:10px;border-color:rgba(61,255,160,0.2);}
.tb-btn.green:hover{background:rgba(61,255,160,0.1);border-color:var(--green-ok);color:var(--green-ok);}

/* ── MAIN LAYOUT ── */
#main-layout{
  position:fixed;
  left:0;right:0;bottom:var(--statusbar-h);
  display:flex;overflow:hidden;
}
#main-layout{top:calc(var(--header-h) + var(--tabs-h) + var(--toolbar-h));}

/* ── PANEL COMMON ── */
.panel{display:flex;flex-direction:column;overflow:hidden;transition:flex 0.22s cubic-bezier(0.4,0,0.2,1);position:relative;min-width:0;}
.panel.collapsed{flex:0 0 var(--collapse-w) !important;}
.panel-collapsed-label{display:none;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) rotate(-90deg);white-space:nowrap;font-family:var(--font-mono);font-size:8px;letter-spacing:3px;color:var(--text-secondary);text-transform:uppercase;pointer-events:none;}
.panel.collapsed .panel-collapsed-label{display:block;}
.panel.collapsed>*:not(.panel-collapsed-label){opacity:0;pointer-events:none;overflow:hidden;}
.resize-handle{width:4px;flex-shrink:0;cursor:col-resize;background:var(--border-dim);position:relative;z-index:10;transition:background .15s;}
.resize-handle:hover,.resize-handle.dragging{background:var(--cyan-mid);}

/* ── TOC PANEL ── */
#toc-panel{flex:0 0 220px;background:var(--bg-deep);border-right:1px solid var(--border-dim);}
.panel-hdr{height:34px;padding:0 12px;border-bottom:1px solid var(--border-dim);flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:6px;}
.panel-label{font-family:var(--font-mono);font-size:8.5px;letter-spacing:3px;color:var(--cyan-base);text-transform:uppercase;display:flex;align-items:center;gap:5px;}
.panel-label::before{content:'';display:inline-block;width:8px;height:1px;background:var(--cyan-base);}
.panel-sub-title{display:none;}
.btn-collapse{background:transparent;border:1px solid var(--border-mid);color:var(--text-muted);width:20px;height:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:9px;transition:var(--transition);border-radius:2px;flex-shrink:0;}
.btn-collapse:hover{border-color:var(--border-bright);color:var(--text-primary);}
#toc-content{flex:1;overflow-y:auto;padding:4px 0;}
#toc-content::-webkit-scrollbar{width:3px;}
#toc-content::-webkit-scrollbar-thumb{background:var(--border-mid);}
.toc-empty{padding:14px 12px;font-family:var(--font-mono);font-size:9px;color:var(--text-muted);letter-spacing:1px;line-height:1.8;}
.toc-item{display:flex;align-items:center;padding:5px 12px;cursor:pointer;transition:var(--transition);gap:7px;border-left:2px solid transparent;}
.toc-item:hover{background:var(--cyan-glow2);border-left-color:var(--cyan-base);}
.toc-item[data-level="1"] .toc-text{color:var(--text-primary);font-weight:600;font-size:12px;}
.toc-item[data-level="2"]{padding-left:20px;}
.toc-item[data-level="2"] .toc-text{color:var(--text-secondary);}
.toc-item[data-level="3"]{padding-left:30px;}
.toc-item[data-level="3"] .toc-text{color:var(--text-muted);font-size:11px;}
.toc-bullet{font-family:var(--font-mono);font-size:8px;color:var(--cyan-base);flex-shrink:0;opacity:0.7;}
.toc-text{font-family:var(--font-body);font-size:11.5px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.toc-lvl{font-family:var(--font-mono);font-size:8px;color:var(--text-muted);margin-left:auto;flex-shrink:0;}
#toc-footer{padding:7px 12px;border-top:1px solid var(--border-dim);flex-shrink:0;}
.stat-row{display:flex;justify-content:space-between;margin-bottom:3px;}
.stat-lbl{font-family:var(--font-mono);font-size:8.5px;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase;}
.stat-val{font-family:var(--font-mono);font-size:8.5px;color:var(--cyan-bright);}

/* ── EDITOR PANEL ── */
#editor-panel{flex:1 1 0;background:var(--bg-surface);border-right:1px solid var(--border-dim);}
.editor-hdr{height:34px;padding:0 12px;border-bottom:1px solid var(--border-dim);flex-shrink:0;display:flex;align-items:center;justify-content:space-between;}
.editor-module-tag{font-family:var(--font-mono);font-size:8.5px;letter-spacing:3px;color:var(--amber);font-weight:600;}
.editor-fname{font-family:var(--font-mono);font-size:9px;color:var(--text-muted);}
#md-editor{flex:1;background:transparent;border:none;outline:none;resize:none;padding:16px 18px;font-family:var(--font-mono);font-size:13px;line-height:1.75;color:var(--text-primary);caret-color:var(--cyan-base);overflow-y:auto;}
#md-editor::-webkit-scrollbar{width:4px;}
#md-editor::-webkit-scrollbar-thumb{background:var(--border-mid);}
#md-editor::selection{background:rgba(56,200,240,.22);}
#md-editor::placeholder{color:var(--text-ghost);font-style:italic;}
#math-indicator{padding:3px 12px;border-top:1px solid var(--border-dim);font-family:var(--font-mono);font-size:9px;letter-spacing:1.5px;color:var(--text-muted);background:var(--bg-panel);flex-shrink:0;display:flex;align-items:center;gap:6px;transition:var(--transition);}
#math-indicator.dirty{color:var(--amber);}
#math-indicator.rendered{color:var(--green-ok);}
.math-ind-dot{width:5px;height:5px;border-radius:50%;background:currentColor;flex-shrink:0;}

/* ── PREVIEW PANEL ── */
#preview-panel{flex:1 1 0;background:var(--bg-deep);display:flex;flex-direction:column;}
.preview-hdr{height:34px;padding:0 12px;border-bottom:1px solid var(--border-dim);flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:8px;}
.preview-module-tag{font-family:var(--font-mono);font-size:8.5px;letter-spacing:3px;color:var(--text-muted);white-space:nowrap;}
.zoom-controls{display:flex;align-items:center;gap:4px;}
.zoom-label{font-family:var(--font-mono);font-size:8.5px;color:var(--text-muted);letter-spacing:1px;}
.zoom-val{font-family:var(--font-mono);font-size:9px;color:var(--cyan-bright);min-width:34px;text-align:center;font-weight:600;}
.zoom-btn{background:transparent;border:1px solid var(--border-mid);color:var(--text-secondary);width:20px;height:20px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:12px;line-height:1;transition:var(--transition);border-radius:2px;}
.zoom-btn:hover{border-color:var(--border-bright);color:var(--text-primary);}
.zoom-reset{font-family:var(--font-mono);font-size:8px;letter-spacing:1px;width:auto;padding:0 5px;}
.btn-print{background:transparent;border:1px solid var(--border-mid);color:var(--text-secondary);font-family:var(--font-mono);font-size:8.5px;letter-spacing:2px;text-transform:uppercase;padding:3px 9px;cursor:pointer;transition:var(--transition);border-radius:2px;white-space:nowrap;}
.btn-print:hover{border-color:var(--border-bright);color:var(--text-primary);background:var(--cyan-glow2);}

/* Preview mode toggle */
.preview-mode-toggle{display:flex;border:1px solid var(--border-mid);border-radius:3px;overflow:hidden;flex-shrink:0;}
.pmode-btn{background:transparent;border:none;color:var(--text-secondary);font-family:var(--font-mono);font-size:9px;letter-spacing:1.5px;text-transform:uppercase;padding:4px 10px;cursor:pointer;transition:var(--transition);white-space:nowrap;}
.pmode-btn:hover{background:var(--cyan-glow2);color:var(--text-primary);}
.pmode-btn.active{background:var(--cyan-glow);color:var(--cyan-bright);font-weight:700;}

/* ── PREVIEW MODE TOGGLE ── */
/* mode: html (default) — renderiza como página web escura */
#preview-scroll{flex:1;overflow-y:auto;overflow-x:auto;padding:28px 40px;display:flex;flex-direction:column;align-items:stretch;}
#preview-scroll::-webkit-scrollbar{width:5px;}
#preview-scroll::-webkit-scrollbar-thumb{background:var(--border-mid);}

/* HTML MODE (default) */
#a4-sheet{
  width:100%;
  min-height:100%;
  background:transparent;
  color:#c8dce8;
  padding:0;
  box-shadow:none;
  border:none;
  font-family: -apple-system, 'Segoe UI', 'Exo 2', sans-serif;
  font-size:15px;
  line-height:1.7;
  position:relative;
  transform:none;
  margin-bottom:0;
}
#a4-sheet::before{display:none;}

/* A4 MODE — ativado por body.a4-mode */
body.a4-mode #preview-scroll{
  background:#0d0f10;
  padding:28px;
  display:flex;
  flex-direction:column;
  align-items:center;
}
body.a4-mode #a4-sheet{
  width:210mm;
  min-height:297mm;
  background:#ffffff;
  color:#1a1a1a;
  padding:20mm 18mm;
  box-shadow:none;
  border:none;
  outline:none;
  font-family:var(--preview-font);
  font-size:11pt;
  line-height:1.65;
  position:relative;
  transform-origin:top center;
  transform:scale(var(--a4-zoom));
  margin-bottom:calc((var(--a4-zoom) - 1) * 297mm);
}
body.a4-mode #a4-sheet::before{
  content:'A4 · 210mm';
  display:block;
  position:absolute;
  top:-20px;right:0;
  font-family:var(--font-mono);
  font-size:8px;
  color:var(--text-ghost);
  letter-spacing:2px;
}

/* ═══════════════════════════════════════════════════════
   HTML MODE PREVIEW — Paleta dark-UI profissional
   Princípio: hierarquia por LUMINOSIDADE, não por cor.
   H1 = mais brilhante → H6 = mais apagado.
   Corpo = confortável para leitura prolongada.
   ═══════════════════════════════════════════════════════ */

/* Base heading reset */
#preview-content h1,#preview-content h2,#preview-content h3,
#preview-content h4,#preview-content h5,#preview-content h6{
  margin:32px 0 10px;
  padding:0;
  border:none;
  border-radius:0;
  background:transparent !important;
  line-height:1.3;
  letter-spacing:-0.01em;
}

/* H1 — âncora visual */
#preview-content h1{
  font-size:var(--h1-size);
  font-weight:700;
  color:var(--h1-color);
  background:var(--h1-bg) !important;
  padding-bottom:10px;
  border-bottom:2px solid rgba(120,180,220,0.22);
  margin-top:8px;
}
/* H2 */
#preview-content h2{
  font-size:var(--h2-size);
  font-weight:600;
  color:var(--h2-color);
  background:var(--h2-bg) !important;
  padding-bottom:7px;
  border-bottom:1px solid rgba(120,180,220,0.14);
}
/* H3 */
#preview-content h3{
  font-size:var(--h3-size);
  font-weight:600;
  color:var(--h3-color);
  background:var(--h3-bg) !important;
}
/* H4 */
#preview-content h4{
  font-size:var(--h4-size);
  font-weight:600;
  color:var(--h4-color);
  background:var(--h4-bg) !important;
}
/* H5, H6 */
#preview-content h5{font-size:var(--h5-size);font-weight:500;color:var(--h5-color);background:var(--h5-bg) !important;}
#preview-content h6{font-size:var(--h6-size);font-weight:500;color:var(--h6-color);background:var(--h6-bg) !important;font-style:italic;}

/* Parágrafo — leitura confortável, nem branco puro nem apagado */
#preview-content p{
  margin:0 0 14px;
  font-size:var(--p-size);
  line-height:var(--spacing-vertical);
  letter-spacing:calc(var(--spacing-horizontal)*1px);
  word-spacing:calc(var(--word-spacing)*1px);
  text-align:var(--text-align);
  color:var(--p-color);
}
/* Links — azul claro não saturado */
#preview-content a{color:var(--link-color);text-decoration:none;border-bottom:1px solid rgba(106,172,218,0.3);}
#preview-content a:hover{filter:brightness(1.2);border-bottom-color:currentColor;}

#preview-content strong{font-weight:700;}
#preview-content em{font-style:italic;}
#preview-content ul,#preview-content ol{margin:6px 0 14px 22px;}
#preview-content li{margin-bottom:5px;font-size:var(--p-size);color:var(--p-color);}

/* Blockquote — borda esquerda reta, direita arredondada */
#preview-content blockquote{
  border-left:3px solid var(--quote-border);
  border-radius:0 6px 6px 0;
  padding:10px 16px;
  margin:16px 0;
  color:var(--quote-color);
  background:var(--quote-bg);
  font-size:var(--quote-size);
  font-style:italic;
}

/* Código inline */
#preview-content code{
  font-family:'Fira Code','JetBrains Mono',monospace;
  font-size:0.87em;
  background:var(--code-inline-bg);
  color:var(--code-inline-color);
  padding:2px 6px;
  border-radius:4px;
}

/* Bloco de código — todas as bordas arredondadas */
#preview-content pre{
  background:var(--code-block-bg);
  border:1px solid var(--code-block-border);
  border-radius:6px;
  padding:14px 18px;
  overflow-x:auto;
  margin:16px 0;
}
#preview-content pre code{
  background:transparent;
  border:none;
  padding:0;
  font-size:0.87em;
  font-style:normal;
}

/* Tabela — zebra gradient, alinhamento esquerda */
#preview-content table{
  width:100%;border-collapse:collapse;margin:16px 0;font-size:0.94em;
}
#preview-content th{
  background:var(--table-header-bg);
  color:rgb(255,255,255);
  padding:9px 13px;
  text-align:left;
  font-weight:600;
  font-size:0.9em;
  border-bottom:2px solid rgba(255,255,255,0.15);
}
#preview-content td{
  padding:8px 13px;
  color:var(--p-color);
  word-wrap:break-word;
  text-align:left;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
/* Zebra gradient — linhas pares com fundo levemente diferente */
#preview-content tr:nth-child(even) td{
  background:rgba(255,255,255,0.04);
}
#preview-content tr:nth-child(odd) td{
  background:rgba(0,0,0,0.25);
}
#preview-content tr:hover td{background:rgba(255,255,255,0.07);}

/* HR */
#preview-content hr{
  border:none;
  height:var(--hr-thickness);
  background:var(--hr-color);
  margin:28px 0;
  opacity:0.6;
}



/* A4 MODE overrides — usa paleta light (papel branco) */
body.a4-mode #preview-content h1,body.a4-mode #preview-content h2,
body.a4-mode #preview-content h3,body.a4-mode #preview-content h4,
body.a4-mode #preview-content h5,body.a4-mode #preview-content h6{
  border-bottom:1px solid rgba(0,0,0,0.12);padding:4px 0;margin:18px 0 8px;background:transparent !important;
}
body.a4-mode #preview-content h1{color:rgb(0,145,15) !important;}
body.a4-mode #preview-content h2{color:rgb(0,0,0) !important;}
body.a4-mode #preview-content h3{color:rgb(0,75,255) !important;}
body.a4-mode #preview-content h4{color:rgb(0,145,50) !important;}
body.a4-mode #preview-content h5{color:rgb(185,0,255) !important;}
body.a4-mode #preview-content h6{color:rgb(255,135,0) !important;}
body.a4-mode #preview-content p,body.a4-mode #preview-content li{color:rgb(0,0,0);font-size:11pt;}
body.a4-mode #preview-content a{color:rgb(0,75,255);}
body.a4-mode #preview-content code{background:rgb(235,235,235);color:rgb(225,15,15);border:none;}
body.a4-mode #preview-content pre{background:rgb(235,235,235);border:1px solid rgb(255,0,0);border-radius:6px;}
body.a4-mode #preview-content pre code{color:#1a1a1a;}
body.a4-mode #preview-content blockquote{background:rgb(235,235,235);color:rgb(0,100,0);border-left-color:rgb(0,100,0);}
body.a4-mode #preview-content th{background:rgb(0,125,255) !important;color:rgb(0,0,0) !important;-webkit-print-color-adjust:exact;print-color-adjust:exact;}
body.a4-mode #preview-content td{border-bottom:1px solid rgba(0,0,0,0.1);color:rgb(0,0,0);}
body.a4-mode #preview-content tr:nth-child(even) td{background:rgba(0,0,0,0.04);}
body.a4-mode #preview-content tr:nth-child(odd)  td{background:transparent;}
body.a4-mode #preview-content hr{background:rgb(0,0,0);height:1px;opacity:0.4;}
body.a4-mode .latex-block-wrapper{background:rgb(175,235,255);border-left-color:rgb(40,60,255);border-radius:0 6px 6px 0;}
body.a4-mode .latex-block-wrapper .MathJax,
body.a4-mode .latex-block-wrapper mjx-container{color:rgb(40,60,255) !important;}
body.a4-mode #preview-content .MathJax{color:rgb(40,60,255) !important;}

/* LaTeX wrappers — borda esquerda reta, direita arredondada */
.latex-block-wrapper{
  position:relative;
  background:var(--latex-block-bg);
  border-left:3px solid var(--latex-block-border);
  border-radius:0 6px 6px 0;
  padding:20px 18px 14px;
  margin:18px 0;
  overflow:hidden;
}
.latex-block-label{
  position:absolute;top:6px;right:10px;
  background:linear-gradient(135deg,#5b2d8e,#9d1f6e);
  color:rgba(255,255,255,0.9);
  padding:2px 8px;border-radius:3px;
  font-size:8px;font-weight:700;letter-spacing:2px;
  font-family:var(--font-mono);
}
.latex-block-wrapper .MathJax,.latex-block-wrapper mjx-container{
  color:var(--latex-block-color) !important;
}
/* Inline MathJax */
#preview-content .MathJax{
  color:var(--latex-inline-color) !important;
  background:transparent !important;
  padding:0 !important;
}

/* ── TOOLBAR SVG ICONS ── */
/* SVGs são pretos por padrão.
   Dark:  brightness(0) invert(1) → força branco
   Light: brightness(0)           → mantém preto */

#toolbar .tb-btn img{
  width:18px;
  height:18px;
  display:block;
  filter:brightness(0) invert(1);
  opacity:0.72;
  transition:filter 0.15s, opacity 0.15s;
  pointer-events:none;
}
#toolbar .tb-btn:hover img{
  filter:brightness(0) invert(1);
  opacity:1;
}

/* Amber — dourado */
#toolbar .tb-btn.amber img{
  filter:brightness(0) invert(1) sepia(1) saturate(5) hue-rotate(5deg);
  opacity:0.85;
}
#toolbar .tb-btn.amber:hover img{
  filter:brightness(0) invert(1) sepia(1) saturate(6) hue-rotate(5deg);
  opacity:1;
}

/* Green — verde */
#toolbar .tb-btn.green img{
  filter:brightness(0) invert(1) sepia(1) saturate(5) hue-rotate(95deg);
  opacity:0.85;
}
#toolbar .tb-btn.green:hover img{
  filter:brightness(0) invert(1) sepia(1) saturate(6) hue-rotate(95deg);
  opacity:1;
}

/* Light mode: preto */
body.light-theme #toolbar .tb-btn img{
  filter:brightness(0);
  opacity:0.65;
}
body.light-theme #toolbar .tb-btn:hover img{
  filter:brightness(0);
  opacity:1;
}
body.light-theme #toolbar .tb-btn.amber img{
  filter:brightness(0) sepia(1) saturate(5) hue-rotate(10deg) brightness(0.5);
  opacity:0.9;
}
body.light-theme #toolbar .tb-btn.amber:hover img{
  filter:brightness(0) sepia(1) saturate(6) hue-rotate(10deg) brightness(0.45);
  opacity:1;
}
body.light-theme #toolbar .tb-btn.green img{
  filter:brightness(0) sepia(1) saturate(5) hue-rotate(95deg) brightness(0.4);
  opacity:0.9;
}
body.light-theme #toolbar .tb-btn.green:hover img{
  filter:brightness(0) sepia(1) saturate(6) hue-rotate(95deg) brightness(0.35);
  opacity:1;
}
#md-editor{position:relative;}
.editor-activeline{
  position:absolute;left:0;right:0;
  background:rgba(56,200,240,0.04);
  border-left:2px solid rgba(56,200,240,0.25);
  pointer-events:none;
  transition:top 0.08s ease;
  z-index:0;
}

/* ── SEARCH / REPLACE ── */
#search-bar{
  position:absolute;top:0;right:0;
  width:380px;
  background:var(--bg-card);
  border:1px solid var(--border-bright);
  border-top:none;border-right:none;
  border-radius:0 0 0 6px;
  padding:10px 12px;
  z-index:200;
  display:none;
  flex-direction:column;
  gap:6px;
  box-shadow:-4px 4px 20px rgba(0,0,0,0.5);
}
#search-bar.open{display:flex;}
.sb-row{display:flex;align-items:center;gap:6px;}
.sb-input{
  flex:1;background:var(--bg-elevated);border:1px solid var(--border-mid);
  color:var(--text-primary);font-family:var(--font-mono);font-size:12px;
  padding:5px 9px;outline:none;border-radius:3px;transition:var(--transition);
}
.sb-input:focus{border-color:var(--border-active);}
.sb-input::placeholder{color:var(--text-ghost);}
.sb-btn{background:transparent;border:1px solid var(--border-mid);color:var(--text-secondary);
  font-family:var(--font-mono);font-size:9px;letter-spacing:1px;padding:4px 8px;
  cursor:pointer;border-radius:3px;transition:var(--transition);white-space:nowrap;flex-shrink:0;}
.sb-btn:hover{border-color:var(--border-bright);color:var(--text-primary);}
.sb-btn.cyan{border-color:var(--cyan-mid);color:var(--cyan-base);}
.sb-btn.cyan:hover{background:var(--cyan-glow);color:var(--cyan-bright);}
.sb-count{font-family:var(--font-mono);font-size:9px;color:var(--text-muted);min-width:60px;text-align:right;}
.sb-options{display:flex;gap:8px;align-items:center;}
.sb-chk{display:flex;align-items:center;gap:4px;cursor:pointer;}
.sb-chk input{accent-color:var(--cyan-base);width:12px;height:12px;}
.sb-chk span{font-family:var(--font-mono);font-size:9px;color:var(--text-muted);}
/* highlight de resultados no preview */
.search-match{background:rgba(255,200,60,0.3);border-radius:2px;outline:1px solid rgba(255,200,60,0.6);}
.search-match.current{background:rgba(56,200,240,0.35);outline-color:var(--cyan-base);}

/* ── FIRESTORE LOAD MODAL ── */
#fs-load-overlay{
  position:fixed;inset:0;background:rgba(4,6,8,.88);
  z-index:5200;display:flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .2s;backdrop-filter:blur(4px);
}
#fs-load-overlay.visible{opacity:1;pointer-events:all;}
#fs-load-box{
  width:560px;max-height:80vh;background:var(--bg-panel);
  border:1px solid var(--border-bright);
  box-shadow:0 0 40px rgba(56,200,240,.1);
  position:relative;display:flex;flex-direction:column;
  transform:translateY(14px) scale(.98);transition:transform .22s cubic-bezier(.34,1.56,.64,1);
}
#fs-load-overlay.visible #fs-load-box{transform:translateY(0) scale(1);}
#fs-load-box::before{content:'';position:absolute;top:-1px;left:-1px;width:12px;height:12px;border-top:2px solid var(--cyan-base);border-left:2px solid var(--cyan-base);}
#fs-load-box::after{content:'';position:absolute;bottom:-1px;right:-1px;width:12px;height:12px;border-bottom:2px solid var(--cyan-base);border-right:2px solid var(--cyan-base);}
.fs-load-hdr{padding:14px 18px 11px;border-bottom:1px solid var(--border-dim);display:flex;align-items:center;justify-content:space-between;flex-shrink:0;}
.fs-load-title{font-family:var(--font-ui);font-weight:700;font-size:15px;letter-spacing:2px;color:var(--text-primary);}
.fs-load-eyebrow{font-family:var(--font-mono);font-size:8px;letter-spacing:3px;color:var(--cyan-mid);text-transform:uppercase;margin-bottom:3px;}
.fs-load-search{
  padding:8px 14px;border-bottom:1px solid var(--border-dim);flex-shrink:0;
}
.fs-load-search input{
  width:100%;background:var(--bg-elevated);border:1px solid var(--border-mid);
  color:var(--text-primary);font-family:var(--font-mono);font-size:12px;
  padding:6px 10px;outline:none;border-radius:3px;
}
.fs-load-search input:focus{border-color:var(--border-active);}
.fs-load-search input::placeholder{color:var(--text-ghost);}
#fs-doc-list{flex:1;overflow-y:auto;min-height:80px;}
#fs-doc-list::-webkit-scrollbar{width:4px;}
#fs-doc-list::-webkit-scrollbar-thumb{background:var(--border-mid);}
.fs-doc-item{
  display:flex;align-items:center;padding:10px 16px;gap:12px;
  cursor:pointer;border-bottom:1px solid var(--border-dim);
  transition:var(--transition);
}
.fs-doc-item:hover{background:var(--cyan-glow2);}
.fs-doc-item.selected{background:var(--cyan-glow);border-left:2px solid var(--cyan-base);}
.fs-doc-title{font-family:var(--font-body);font-size:13px;color:var(--text-primary);font-weight:600;flex:1;}
.fs-doc-status{font-family:var(--font-mono);font-size:8.5px;padding:2px 7px;border-radius:2px;letter-spacing:1px;flex-shrink:0;}
.fs-doc-status.construcao{background:var(--amber-dim);color:var(--amber);}
.fs-doc-status.conjectura{background:var(--cyan-glow);color:var(--cyan-base);}
.fs-doc-status.erro{background:var(--red-dim);color:var(--red-alert);}
.fs-doc-date{font-family:var(--font-mono);font-size:9px;color:var(--text-ghost);flex-shrink:0;}
.fs-empty{padding:24px;text-align:center;font-family:var(--font-mono);font-size:10px;color:var(--text-ghost);}
.fs-load-ftr{padding:10px 16px;border-top:1px solid var(--border-dim);display:flex;justify-content:flex-end;gap:8px;flex-shrink:0;}

/* ── DIFF VIEW ── */
.diff-add{background:rgba(61,255,160,0.12);border-left:3px solid var(--green-ok);}
.diff-del{background:rgba(255,85,85,0.12);border-left:3px solid var(--red-alert);text-decoration:line-through;opacity:.7;}
.diff-chg{background:rgba(56,200,240,0.08);border-left:3px solid var(--cyan-base);}

/* ── AUTO-SAVE INDICATOR ── */
#autosave-dot{
  display:inline-flex;align-items:center;gap:5px;
  font-family:var(--font-mono);font-size:9px;color:var(--text-ghost);
  transition:var(--transition);
}
#autosave-dot.saving{color:var(--amber);}
#autosave-dot.saved{color:var(--green-ok);}
#autosave-dot .as-dot{width:5px;height:5px;border-radius:50%;background:currentColor;flex-shrink:0;}

/* ── CURSOR POSITION ── */
#cursor-pos{font-family:var(--font-mono);font-size:9px;color:var(--text-secondary);white-space:nowrap;}
#cursor-pos span{color:var(--cyan-bright);font-weight:600;}

/* ── READ TIME ── */
#read-time{font-family:var(--font-mono);font-size:9px;color:var(--text-muted);white-space:nowrap;}

#preview-content sup{
  font-size:0.72em;vertical-align:super;line-height:0;
  color:inherit;
}
#preview-content sub{
  font-size:0.72em;vertical-align:sub;line-height:0;
  color:inherit;
}
#preview-content u{
  text-decoration:underline;
  text-decoration-color:rgba(120,180,220,0.6);
  text-underline-offset:3px;
}
#preview-content mark{
  background:rgba(240,208,60,0.22);
  color:inherit;
  border-radius:2px;
  padding:0 3px;
}
/* Task list (GFM checkboxes) */
#preview-content input[type="checkbox"]{
  appearance:none;-webkit-appearance:none;
  width:14px;height:14px;
  border:1.5px solid var(--text-muted);
  border-radius:3px;
  background:transparent;
  display:inline-flex;align-items:center;justify-content:center;
  cursor:default;margin-right:6px;vertical-align:middle;
  position:relative;flex-shrink:0;
  transition:var(--transition);
}
#preview-content input[type="checkbox"]:checked{
  background:var(--cyan-base);
  border-color:var(--cyan-base);
}
#preview-content input[type="checkbox"]:checked::after{
  content:'✓';
  position:absolute;
  color:var(--bg-void);
  font-size:9px;
  font-weight:700;
  line-height:1;
}
#preview-content ul.contains-task-list,
#preview-content li.task-list-item{list-style:none;padding-left:0;}

/* A4 mode: checkboxes in print style */
body.a4-mode #preview-content input[type="checkbox"]{
  border-color:#8a9ba8;
}
body.a4-mode #preview-content input[type="checkbox"]:checked{
  background:#2e5068;border-color:#2e5068;
}
body.a4-mode #preview-content input[type="checkbox"]:checked::after{color:#fff;}
#symbol-panel{position:fixed;top:calc(var(--header-h) + var(--tabs-h) + var(--toolbar-h));right:0;bottom:var(--statusbar-h);width:340px;background:var(--bg-panel);border-left:1px solid var(--border-mid);display:flex;flex-direction:column;z-index:997;transform:translateX(100%);transition:transform 0.28s cubic-bezier(0.4,0,0.2,1);box-shadow:-4px 0 30px rgba(0,0,0,0.5);}
#symbol-panel.open{transform:translateX(0);}
.sym-panel-hdr{padding:9px 13px 7px;border-bottom:1px solid var(--border-dim);flex-shrink:0;display:flex;align-items:center;justify-content:space-between;}
.sym-panel-title{font-family:var(--font-ui);font-weight:700;font-size:13px;letter-spacing:2px;color:var(--amber);}
.sym-panel-sub{font-family:var(--font-mono);font-size:8.5px;color:var(--text-muted);letter-spacing:1.5px;text-transform:uppercase;margin-top:2px;}
.btn-sym-close{background:transparent;border:1px solid var(--border-dim);color:var(--text-muted);width:24px;height:24px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:12px;transition:var(--transition);border-radius:2px;}
.btn-sym-close:hover{border-color:var(--red-alert);color:var(--red-alert);}

/* color tools */
#color-tools{padding:7px 11px;border-bottom:1px solid var(--border-dim);flex-shrink:0;background:var(--bg-elevated);}
.ct-tabs{display:flex;gap:2px;margin-bottom:5px;}
.ct-tab{background:transparent;border:1px solid var(--border-dim);color:var(--text-muted);font-family:var(--font-mono);font-size:8.5px;letter-spacing:1px;padding:3px 7px;cursor:pointer;border-radius:2px;transition:var(--transition);}
.ct-tab.active{border-color:var(--cyan-mid);color:var(--cyan-base);background:var(--cyan-glow2);}
.ct-row{display:flex;align-items:center;gap:5px;margin-bottom:5px;}
.ct-row:last-child{margin-bottom:0;}
.ct-label{font-family:var(--font-mono);font-size:8.5px;letter-spacing:1px;color:var(--text-muted);text-transform:uppercase;width:50px;flex-shrink:0;}
.ct-swatches{display:flex;gap:2px;flex-wrap:wrap;flex:1;}
.swatch{width:16px;height:16px;border-radius:2px;border:1px solid rgba(255,255,255,.1);cursor:pointer;transition:transform .12s,box-shadow .12s;flex-shrink:0;}
.swatch:hover{transform:scale(1.25);box-shadow:0 0 6px rgba(255,255,255,.3);}
.swatch.active{outline:2px solid var(--cyan-base);outline-offset:1px;}
.ct-custom{display:flex;align-items:center;gap:3px;}
.ct-custom input[type=color]{width:20px;height:16px;border:1px solid var(--border-mid);background:transparent;cursor:pointer;padding:0;border-radius:2px;}
.ct-prev-strip{display:flex;align-items:center;gap:6px;margin-top:5px;padding-top:5px;border-top:1px solid var(--border-dim);}
.ct-prev-box{flex:1;padding:3px 7px;border-radius:3px;font-family:var(--font-mono);font-size:11px;text-align:center;transition:var(--transition);}
.btn-apply-color{background:var(--cyan-mid);border:none;color:var(--bg-void);font-family:var(--font-mono);font-size:8.5px;letter-spacing:1.5px;text-transform:uppercase;padding:4px 9px;cursor:pointer;border-radius:2px;transition:var(--transition);}
.btn-apply-color:hover{background:var(--cyan-base);}
.btn-clear-color{background:transparent;border:1px solid var(--border-dim);color:var(--text-muted);font-family:var(--font-mono);font-size:8.5px;padding:3px 7px;cursor:pointer;border-radius:2px;transition:var(--transition);}
.btn-clear-color:hover{border-color:var(--red-alert);color:var(--red-alert);}

.sym-search-row{padding:6px 10px;border-bottom:1px solid var(--border-dim);flex-shrink:0;}
.sym-search{width:100%;background:var(--bg-surface);border:1px solid var(--border-mid);color:var(--text-primary);font-family:var(--font-mono);font-size:11.5px;padding:5px 9px;outline:none;border-radius:2px;transition:var(--transition);}
.sym-search:focus{border-color:var(--border-active);}
.sym-search::placeholder{color:var(--text-ghost);font-style:italic;}
.sym-cats{display:flex;gap:2px;padding:5px 8px;border-bottom:1px solid var(--border-dim);flex-shrink:0;flex-wrap:wrap;}
.sym-cat-btn{background:transparent;border:1px solid var(--border-dim);color:var(--text-muted);font-family:var(--font-mono);font-size:7.5px;letter-spacing:1px;text-transform:uppercase;padding:2px 6px;cursor:pointer;border-radius:2px;transition:var(--transition);}
.sym-cat-btn:hover{border-color:var(--border-mid);color:var(--text-secondary);}
.sym-cat-btn.active{border-color:var(--amber);color:var(--amber);background:var(--amber-dim);}
#sym-grid-wrap{flex:1;overflow-y:auto;padding:6px;}
#sym-grid-wrap::-webkit-scrollbar{width:3px;}
#sym-grid-wrap::-webkit-scrollbar-thumb{background:var(--border-mid);}
.sym-category-title{font-family:var(--font-mono);font-size:8.5px;letter-spacing:2px;color:var(--cyan-mid);text-transform:uppercase;padding:6px 4px 3px;display:flex;align-items:center;gap:5px;}
.sym-category-title::after{content:'';flex:1;height:1px;background:var(--border-dim);}
.sym-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(32px,1fr));gap:2px;margin-bottom:6px;}
.sym-btn{width:32px;height:32px;background:var(--bg-elevated);border:1px solid var(--border-dim);color:var(--text-primary);font-size:15px;cursor:pointer;border-radius:3px;display:flex;align-items:center;justify-content:center;transition:var(--transition);position:relative;}
.sym-btn:hover{background:var(--cyan-glow);border-color:var(--border-bright);transform:scale(1.15);z-index:2;}
.sym-btn[title]:hover::after{content:attr(title);position:absolute;bottom:-20px;left:50%;transform:translateX(-50%);background:var(--bg-card);border:1px solid var(--border-mid);color:var(--text-secondary);font-size:8px;padding:2px 5px;white-space:nowrap;font-family:var(--font-mono);z-index:100;pointer-events:none;}

/* ═══════════════════════
   SETTINGS MODAL
   ═══════════════════════ */
#settings-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.85);z-index:6000;align-items:center;justify-content:center;backdrop-filter:blur(4px);}
#settings-overlay.active{display:flex;}
.settings-panel{background:var(--bg-panel);border:1px solid var(--border-bright);border-radius:4px;width:92%;max-width:820px;max-height:88vh;overflow-y:auto;padding:24px;box-shadow:0 0 60px rgba(0,212,255,.1);}
.settings-panel::-webkit-scrollbar{width:5px;}
.settings-panel::-webkit-scrollbar-thumb{background:var(--border-mid);}
.settings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;padding-bottom:16px;border-bottom:1px solid var(--border-dim);}
.settings-title{font-family:var(--font-ui);font-weight:700;font-size:20px;letter-spacing:3px;color:var(--cyan-base);text-shadow:0 0 12px var(--cyan-glow);}
.close-settings{background:transparent;border:1px solid var(--border-dim);color:var(--text-muted);width:28px;height:28px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:14px;transition:var(--transition);border-radius:2px;}
.close-settings:hover{border-color:var(--red-alert);color:var(--red-alert);}
.settings-section{margin-bottom:22px;}
.section-title{font-family:var(--font-ui);font-weight:600;font-size:14px;letter-spacing:2px;color:var(--cyan-mid);text-transform:uppercase;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border-dim);}
.setting-row{display:grid;grid-template-columns:190px 1fr;gap:12px;margin-bottom:10px;align-items:center;}
.setting-label{font-family:var(--font-body);font-size:13px;color:var(--text-secondary);}
.setting-input{background:var(--bg-surface);border:1px solid var(--border-mid);padding:7px 11px;border-radius:2px;color:var(--text-primary);font-size:13px;font-family:var(--font-mono);outline:none;width:100%;transition:var(--transition);}
.setting-input:focus{border-color:var(--border-active);}
select.setting-input option{background:var(--bg-panel);}
.color-input{width:48px;height:34px;border:1px solid var(--border-mid);border-radius:3px;cursor:pointer;background:transparent;padding:2px;}
.s-row-flex{display:flex;align-items:center;gap:8px;}
.s-chk-label{font-family:var(--font-mono);font-size:10px;color:var(--text-muted);}
.theme-buttons{display:flex;gap:8px;}
.theme-btn{padding:7px 16px;background:var(--bg-elevated);border:1px solid var(--border-mid);color:var(--text-secondary);cursor:pointer;border-radius:2px;font-family:var(--font-mono);font-size:10px;letter-spacing:1px;transition:var(--transition);}
.theme-btn:hover{border-color:var(--border-bright);color:var(--text-primary);}
.theme-btn.active{background:var(--cyan-mid);color:var(--bg-void);border-color:var(--cyan-mid);}
.settings-footer{display:flex;gap:8px;justify-content:flex-end;margin-top:20px;}
.btn-settings-reset{background:transparent;border:1px solid var(--border-mid);color:var(--text-muted);font-family:var(--font-mono);font-size:10px;letter-spacing:1px;padding:8px 14px;cursor:pointer;border-radius:2px;transition:var(--transition);}
.btn-settings-reset:hover{border-color:var(--red-alert);color:var(--red-alert);}
.btn-settings-apply{background:var(--cyan-base);border:none;color:var(--bg-void);font-family:var(--font-ui);font-weight:700;font-size:12px;letter-spacing:2px;text-transform:uppercase;padding:9px 20px;cursor:pointer;transition:var(--transition);clip-path:polygon(7px 0%,100% 0%,calc(100% - 7px) 100%,0% 100%);}
.btn-settings-apply:hover{background:var(--cyan-bright);}

/* ═══════════════════════════════════════════════════
   LIGHT THEME — Slate IDE
   Base: papel off-white levemente azulado
   Superfícies: variações de cinza-azulado frio
   Texto: tinta quase preta com hierarquia clara
   Accent: azul-cobalto vivo (não cyan)
   ═══════════════════════════════════════════════════ */
body.light-theme {
  /* Backgrounds — papel e cinza frio */
  --bg-void:        #eef1f5;
  --bg-deep:        #e4e9ef;
  --bg-surface:     #dce2ea;
  --bg-panel:       #d4dce6;
  --bg-elevated:    #ccd5e0;
  --bg-card:        #c4cedd;

  /* Borders — azul-slate visíveis mas não agressivos */
  --border-dim:     rgba(40,80,130,0.10);
  --border-mid:     rgba(40,80,130,0.22);
  --border-bright:  rgba(40,80,130,0.50);
  --border-active:  rgba(40,80,130,0.80);

  /* Accent — cobalto vivo substitui cyan */
  --cyan-dim:       #bccfe8;
  --cyan-mid:       #3a6fb5;
  --cyan-base:      #1a5fcc;
  --cyan-bright:    #1248a8;
  --cyan-glow:      rgba(26,95,204,0.12);
  --cyan-glow2:     rgba(26,95,204,0.06);

  /* Amber e green — mais saturados no claro */
  --amber:          #c07800;
  --amber-dim:      rgba(192,120,0,0.12);
  --green-ok:       #1a8a4a;

  /* Texto — hierarquia tinta escura */
  --text-primary:   #0f1e2d;   /* quase preto azulado */
  --text-secondary: #2a4060;   /* azul-ardósia escuro */
  --text-muted:     #4a6a88;   /* cinza-azulado médio */
  --text-ghost:     #8aaabb;   /* apoio suave */
}

/* Ajustes específicos para o light theme */
body.light-theme #md-editor {
  color: #0f1e2d;
  caret-color: #1a5fcc;
}
body.light-theme #md-editor::placeholder { color: #8aaabb; }
body.light-theme #md-editor::selection   { background: rgba(26,95,204,0.18); }

/* Editor tem fundo levemente mais claro que os painéis */
body.light-theme #editor-panel { background: #f2f5f8; }
body.light-theme #toc-panel    { background: #e8edf3; }
body.light-theme #preview-panel{ background: #eef1f5; }
body.light-theme #app-header   { background: #d0dae6; box-shadow: 0 1px 12px rgba(0,0,0,0.12); }
body.light-theme #tabs-row     { background: #d8e2ec; }
body.light-theme #toolbar      { background: #d0dae6; }
body.light-theme #status-bar   { background: #ccd5e0; }

/* TOC items no light */
body.light-theme .toc-item[data-level="1"] .toc-text { color: #0f1e2d; }
body.light-theme .toc-text { color: #2a4060; }
body.light-theme .toc-item[data-level="3"] .toc-text { color: #4a6a88; }
body.light-theme .panel-collapsed-label { color: #4a6a88; }

/* Logo e glyph no light */
body.light-theme .logo-glyph  { color: #1a5fcc; filter: drop-shadow(0 0 6px rgba(26,95,204,0.4)); }
body.light-theme .logo-text   { color: #1a5fcc; text-shadow: none; }
body.light-theme .status-dot  { background: #1a8a4a; box-shadow: 0 0 5px rgba(26,138,74,0.6); }

/* Botões no light */
body.light-theme .tb-btn       { color: #2a4060; }
body.light-theme .tb-btn:hover { color: #0f1e2d; background: rgba(26,95,204,0.1); border-color: rgba(26,95,204,0.4); }
body.light-theme .hdr-btn      { color: #2a4060; border-color: rgba(40,80,130,0.25); }
body.light-theme .hdr-btn:hover{ color: #0f1e2d; }
body.light-theme .btn-save-main{ border-color: #1a5fcc; color: #1a5fcc; }
body.light-theme .btn-save-main:hover::before { opacity: 1; }
body.light-theme .ptog-btn.active { background: rgba(26,95,204,0.1); border-color: #1a5fcc; color: #1a5fcc; }
body.light-theme .tab-btn.active  { color: #1a5fcc; border-bottom-color: #1a5fcc; }

/* Preview HTML no light — cores da tabela */
body.light-theme #a4-sheet { color: rgb(0,0,0); }
body.light-theme #preview-content h1 { color: rgb(0,145,15) !important; }
body.light-theme #preview-content h2 { color: rgb(0,0,0) !important; }
body.light-theme #preview-content h3 { color: rgb(0,75,255) !important; }
body.light-theme #preview-content h4 { color: rgb(0,145,50) !important; }
body.light-theme #preview-content h5 { color: rgb(185,0,255) !important; }
body.light-theme #preview-content h6 { color: rgb(255,135,0) !important; }
body.light-theme #preview-content p,
body.light-theme #preview-content li  { color: rgb(0,0,0) !important; }
body.light-theme #preview-content strong { color: rgb(0,0,0); }
body.light-theme #preview-content a   { color: rgb(0,75,255) !important; }
/* Código inline light */
body.light-theme #preview-content code{ background:rgb(235,235,235); color:rgb(225,15,15); border:none; }
/* Bloco de código light — todas bordas arredondadas */
body.light-theme #preview-content pre { background:rgb(235,235,235); border:1px solid rgb(255,0,0); border-radius:6px; }
body.light-theme #preview-content pre code{ color:#1a1a1a; }
/* Blockquote light */
body.light-theme #preview-content blockquote {
  background:rgb(235,235,235);
  color:rgb(0,100,0);
  border-left-color:rgb(0,100,0);
}
/* Tabela light */
body.light-theme #preview-content th  { background:rgb(0,125,255) !important; color:rgb(0,0,0) !important; -webkit-print-color-adjust:exact; print-color-adjust:exact; }
body.light-theme #preview-content td  { color:rgb(0,0,0); border-bottom-color:rgba(0,0,0,0.08); }
body.light-theme #preview-content tr:nth-child(even) td { background:rgba(0,0,0,0.04); }
body.light-theme #preview-content tr:nth-child(odd)  td { background:rgba(0,0,0,0.01); }
body.light-theme #preview-content tr:hover td { background:rgba(0,75,255,0.06); }
/* HR light */
body.light-theme #preview-content hr { background:rgb(0,0,0); }
/* LaTeX light */
body.light-theme .latex-block-wrapper { background:rgb(175,235,255); border-left-color:rgb(40,60,255); }
body.light-theme .latex-block-wrapper .MathJax,
body.light-theme .latex-block-wrapper mjx-container { color:rgb(40,60,255) !important; }
body.light-theme #preview-content .MathJax { color:rgb(40,60,255) !important; }

/* ── MODAL SAVE ── */
#modal-overlay{position:fixed;inset:0;background:rgba(4,6,8,.88);z-index:5000;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .2s;backdrop-filter:blur(4px);}
#modal-overlay.visible{opacity:1;pointer-events:all;}
#modal-box{width:460px;background:var(--bg-panel);border:1px solid var(--border-bright);box-shadow:0 0 40px rgba(0,212,255,.1);position:relative;transform:translateY(14px) scale(.98);transition:transform .22s cubic-bezier(.34,1.56,.64,1);}
#modal-overlay.visible #modal-box{transform:translateY(0) scale(1);}
#modal-box::before{content:'';position:absolute;top:-1px;left:-1px;width:12px;height:12px;border-top:2px solid var(--cyan-base);border-left:2px solid var(--cyan-base);}
#modal-box::after{content:'';position:absolute;bottom:-1px;right:-1px;width:12px;height:12px;border-bottom:2px solid var(--cyan-base);border-right:2px solid var(--cyan-base);}
.modal-hdr{padding:14px 18px 11px;border-bottom:1px solid var(--border-dim);display:flex;align-items:flex-start;justify-content:space-between;}
.modal-eyebrow{font-family:var(--font-mono);font-size:8px;letter-spacing:3px;color:var(--cyan-mid);text-transform:uppercase;margin-bottom:4px;}
.modal-title{font-family:var(--font-ui);font-weight:700;font-size:16px;letter-spacing:2px;color:var(--text-primary);}
.modal-close{background:transparent;border:1px solid var(--border-dim);color:var(--text-muted);width:26px;height:26px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:13px;transition:var(--transition);border-radius:2px;}
.modal-close:hover{border-color:var(--red-alert);color:var(--red-alert);}
.modal-body{padding:16px 18px;}
.field-group{margin-bottom:14px;}
.field-label{font-family:var(--font-mono);font-size:8.5px;letter-spacing:2px;color:var(--text-muted);text-transform:uppercase;margin-bottom:5px;display:flex;align-items:center;gap:4px;}
.field-label .req{color:var(--cyan-mid);}
.field-input,.field-select{width:100%;background:var(--bg-surface);border:1px solid var(--border-mid);color:var(--text-primary);font-family:var(--font-mono);font-size:13px;padding:8px 12px;outline:none;transition:var(--transition);border-radius:2px;appearance:none;}
.field-input:focus,.field-select:focus{border-color:var(--border-active);}
.field-input::placeholder{color:var(--text-ghost);}
.select-wrap{position:relative;}
.select-arrow{position:absolute;right:10px;top:50%;transform:translateY(-50%);color:var(--cyan-mid);pointer-events:none;font-size:9px;}
.status-badge-prev{margin-top:4px;display:inline-flex;align-items:center;gap:5px;font-family:var(--font-mono);font-size:9.5px;padding:3px 9px;border-radius:2px;opacity:0;transition:var(--transition);}
.status-badge-prev.visible{opacity:1;}
.status-badge-prev.construcao{background:var(--amber-dim);color:var(--amber);border:1px solid rgba(255,170,0,.3);}
.status-badge-prev.conjectura{background:var(--cyan-glow);color:var(--cyan-base);border:1px solid var(--border-mid);}
.status-badge-prev.erro{background:var(--red-dim);color:var(--red-alert);border:1px solid rgba(255,58,58,.3);}
.modal-ftr{padding:11px 18px 14px;border-top:1px solid var(--border-dim);display:flex;justify-content:flex-end;align-items:center;gap:8px;}
.btn-cancel{background:transparent;border:1px solid var(--border-mid);color:var(--text-muted);font-family:var(--font-mono);font-size:9.5px;letter-spacing:2px;text-transform:uppercase;padding:7px 13px;cursor:pointer;transition:var(--transition);border-radius:2px;}
.btn-cancel:hover{border-color:var(--border-bright);color:var(--text-secondary);}
.btn-confirm{display:flex;align-items:center;gap:7px;background:var(--cyan-base);border:none;color:var(--bg-void);font-family:var(--font-ui);font-weight:700;font-size:11px;letter-spacing:2px;text-transform:uppercase;padding:8px 16px;cursor:pointer;transition:var(--transition);clip-path:polygon(7px 0%,100% 0%,calc(100% - 7px) 100%,0% 100%);}
.btn-confirm:hover{background:var(--cyan-bright);}
.btn-confirm:disabled{background:var(--bg-elevated);color:var(--text-ghost);cursor:not-allowed;}

/* ── STATUS BAR ── */
#status-bar{position:fixed;bottom:0;left:0;right:0;height:var(--statusbar-h);background:var(--bg-panel);border-top:1px solid var(--border-dim);display:flex;align-items:center;padding:0 14px;justify-content:space-between;z-index:990;}
.sb-left,.sb-right{display:flex;align-items:center;gap:14px;}
.sb-stat{font-family:var(--font-mono);font-size:9px;letter-spacing:1px;color:var(--text-secondary);white-space:nowrap;}
.sb-stat span{color:var(--cyan-bright);font-weight:600;}
#fb-status{font-family:var(--font-mono);font-size:9px;color:var(--text-muted);display:flex;align-items:center;gap:5px;}
.fb-dot{width:5px;height:5px;border-radius:50%;background:var(--text-muted);}
.fb-dot.connected{background:var(--green-ok);box-shadow:0 0 6px rgba(61,255,160,0.6);}
.fb-dot.error{background:var(--red-alert);}

/* ── TOAST ── */
#toast{position:fixed;bottom:36px;right:20px;background:var(--bg-card);border:1px solid var(--border-bright);color:var(--text-primary);font-family:var(--font-mono);font-size:10.5px;letter-spacing:.5px;padding:9px 15px;z-index:9000;opacity:0;transform:translateY(10px);transition:all .22s;display:flex;align-items:center;gap:8px;max-width:300px;clip-path:polygon(9px 0%,100% 0%,calc(100% - 9px) 100%,0% 100%);}
#toast.show{opacity:1;transform:translateY(0);}
#toast.success{border-color:var(--green-ok);}
#toast.success .t-icon{color:var(--green-ok);}
#toast.error{border-color:var(--red-alert);}
#toast.error .t-icon{color:var(--red-alert);}
.t-icon{font-size:12px;flex-shrink:0;}

/* ── LOADING ── */
#loading-overlay{position:fixed;inset:0;background:var(--bg-void);z-index:8000;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;transition:opacity .4s;}
#loading-overlay.hidden{opacity:0;pointer-events:none;}
.loading-glyph{font-size:48px;color:var(--cyan-base);filter:drop-shadow(0 0 20px var(--cyan-base));animation:spin-glyph 3s linear infinite;}
@keyframes spin-glyph{0%{transform:rotate(0deg) scale(1);}50%{transform:rotate(180deg) scale(1.1);}100%{transform:rotate(360deg) scale(1);}}
.loading-text{font-family:var(--font-mono);font-size:10px;letter-spacing:4px;color:var(--text-muted);text-transform:uppercase;animation:blink-load 1.2s ease-in-out infinite;}
@keyframes blink-load{0%,100%{opacity:1;}50%{opacity:.3;}}

/* ── PRINT ── */
@media print{
  @page{ margin: 15mm; }

  /* Ocultar tudo exceto o preview */
  body::before,.bracket-corner,
  #app-header,#tabs-row,#toolbar,#toc-panel,#editor-panel,#symbol-panel,
  #modal-overlay,#toast,#loading-overlay,#status-bar,#settings-overlay,
  #fs-load-overlay,#diff-overlay,#search-bar,.resize-handle,
  .preview-hdr,.math-ind,.math-indicator{
    display:none !important;
  }

  /* Reset de todos os containers para fluxo de página normal */
  html,body{
    height:auto !important;
    overflow:visible !important;
    background:white !important;
  }
  #main-layout{
    position:static !important;
    display:block !important;
    height:auto !important;
    overflow:visible !important;
  }
  #preview-panel{
    position:static !important;
    display:block !important;
    width:100% !important;
    height:auto !important;
    overflow:visible !important;
    background:white !important;
    flex:none !important;
  }
  #preview-scroll{
    position:static !important;
    display:block !important;
    overflow:visible !important;
    padding:0 !important;
    height:auto !important;
    width:100% !important;
  }
  #a4-sheet{
    position:static !important;
    width:100% !important;
    min-height:auto !important;
    height:auto !important;
    padding:0 !important;
    margin:0 !important;
    box-shadow:none !important;
    transform:none !important;
    border:none !important;
    background:white !important;
    color:#1a1a1a !important;
    font-family:Georgia,serif !important;
    font-size:11pt !important;
    line-height:1.65 !important;
    overflow:visible !important;
  }
  #a4-sheet::before{ display:none !important; }

  /* Tipografia de impressão */
  #preview-content h1,#preview-content h2,#preview-content h3,
  #preview-content h4,#preview-content h5,#preview-content h6{
    color:#1a1a1a !important; background:transparent !important;
    page-break-after:avoid; break-after:avoid;
  }
  #preview-content p,#preview-content li{ color:#1a1a1a !important; }
  #preview-content a{ color:#1e5fa0 !important; }
  #preview-content pre,#preview-content blockquote,
  #preview-content table,.latex-block-wrapper{
    page-break-inside:avoid; break-inside:avoid;
  }
  #preview-content pre{ background:#f5f5f5 !important; border-left:3px solid #aaa !important; }
  #preview-content code{ background:#f0f0f0 !important; color:#333 !important; }
  #preview-content th{ background:#2e5068 !important; color:white !important; -webkit-print-color-adjust:exact; print-color-adjust:exact; }
  .latex-block-label{ background:#9C27B0 !important; -webkit-print-color-adjust:exact; print-color-adjust:exact; }
}