/* ==========================================================================
   PHM BOARD — ESTILOS VISUAIS E INTERFACE DO BOARD DIGITAL
   Prof. Paulo Henrique Maciel · PHM Tech
   Editorial Técnico & Humanista — Geometria Estrita (4px/6px/2px)
   ========================================================================== */

:root {
  --board-teal: #0d9488;
  --board-teal-dark: #0f766e;
  --board-teal-light: #ccfbf1;
  --board-navy: #0f172a;
  --board-surface: #ffffff;
  --board-border: #e2e8f0;
  --board-border-strong: #cbd5e1;
  --board-shadow-float: 0 10px 30px -5px rgba(0, 0, 0, 0.15), 0 4px 10px -2px rgba(0, 0, 0, 0.05);

  --quadro-teal: var(--board-teal);
  --quadro-teal-dark: var(--board-teal-dark);
  --quadro-teal-light: var(--board-teal-light);
  --quadro-navy: var(--board-navy);
  --quadro-surface: var(--board-surface);
  --quadro-border: var(--board-border);
  --quadro-border-strong: var(--board-border-strong);
  --quadro-shadow-float: var(--board-shadow-float);
}

/* ==========================================================================
   LANDING PAGE STYLES
   ========================================================================== */
.board-landing-body,
.quadro-landing-body {
  background: var(--bg, #f8fafc);
  color: var(--text, #1e293b);
  font-family: var(--font-body, 'Plus Jakarta Sans', sans-serif);
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  transition: background 0.2s ease, color 0.2s ease;
}

.board-landing-header,
.quadro-landing-header {
  background: var(--surface, rgba(255, 255, 255, 0.95));
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line, #e2e8f0);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.75rem 0;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.board-landing-nav,
.quadro-landing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.board-brand,
.quadro-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--navy, #0b1e3d);
}

.board-brand-icon,
.quadro-brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm, 4px);
  background: var(--surface-soft, #f0fdfa);
  color: var(--board-teal, #0d9488);
  border: 1px solid var(--line, #ccfbf1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.board-brand-name,
.quadro-brand-name {
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  display: block;
  color: var(--text, #1e293b);
}

.board-brand-sub,
.quadro-brand-sub {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem;
  color: var(--text-muted, #64748b);
  font-weight: 500;
  letter-spacing: 0.04em;
  display: block;
}

.board-nav-actions,
.quadro-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.board-hero-section,
.quadro-hero-section {
  padding: 3.5rem 0 2rem;
  text-align: center;
}

.board-hero-content,
.quadro-hero-content {
  max-width: 820px;
  margin: 0 auto;
}

.board-kicker-badge,
.quadro-kicker-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm, 4px);
  background: var(--surface-soft, rgba(13, 148, 136, 0.1));
  border: 1px solid var(--line-strong, rgba(13, 148, 136, 0.3));
  color: var(--board-teal, #0d9488);
  margin-bottom: 1.25rem;
}

.board-hero-title {
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 800;
  color: var(--text, #1e293b);
  line-height: 1.15;
  margin: 0.5rem 0 1.25rem 0;
  letter-spacing: -0.02em;
}

.board-hero-highlight,
.quadro-hero-highlight {
  color: var(--board-teal, #0d9488);
  font-style: italic;
}

.board-hero-lead,
.quadro-hero-lead {
  font-size: 1.15rem;
  color: var(--text-soft, #334155);
  line-height: 1.6;
  margin: 0 auto 1.5rem auto;
  max-width: 720px;
}

.board-privacy-tag,
.quadro-privacy-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface-soft, #f1f5f9);
  border: 1px solid var(--line, #e2e8f0);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-sm, 4px);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-soft, #334155);
  margin-bottom: 2rem;
}

.board-hero-actions,
.quadro-hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.board-btn-huge,
.quadro-btn-huge {
  padding: 0.85rem 1.8rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm, 4px);
  box-shadow: var(--shadow-sm, 0 4px 14px rgba(13, 148, 136, 0.25));
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.board-recovery-banner,
.quadro-recovery-banner {
  background: var(--surface-soft, #f0fdfa);
  border: 1px solid var(--line-strong, #99f6e4);
  border-radius: var(--radius-md, 6px);
  padding: 1rem 1.5rem;
  margin-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  text-align: left;
}

.board-preview-mockup,
.quadro-preview-mockup {
  margin: 3.5rem auto 0 auto;
  max-width: 960px;
  background: var(--surface, #ffffff);
  border: 1px solid var(--line-strong, #cbd5e1);
  border-radius: var(--radius-md, 6px);
  box-shadow: var(--shadow-lg, 0 20px 40px -10px rgba(0, 0, 0, 0.12));
  overflow: hidden;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.mockup-top-bar {
  background: var(--surface-soft, #f8fafc);
  border-bottom: 1px solid var(--line, #e2e8f0);
  padding: 0.65rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mockup-dots {
  display: flex;
  gap: 6px;
}

.mockup-dots span {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-xs, 2px);
  background: var(--line-strong, #cbd5e1);
}

.mockup-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text, #1e293b);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.mockup-badge {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--surface-muted, #e2e8f0);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm, 4px);
  color: var(--text-soft, #475569);
}

.mockup-canvas-area {
  min-height: 320px;
  background: var(--surface, #ffffff);
  background-image: radial-gradient(var(--line, #e2e8f0) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

[data-theme="dark"] .mockup-canvas-area {
  background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1.5px, transparent 1.5px);
}

.mockup-sketch {
  text-align: center;
}

.sketch-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.sketch-box {
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius-sm, 4px);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-weight: 700;
  font-size: 0.92rem;
  border: 2px solid;
}

.sketch-box.b1 { background: rgba(56, 189, 248, 0.12); border-color: #0284c7; color: #0284c7; }
.sketch-box.b2 { background: rgba(234, 179, 8, 0.12); border-color: #ca8a04; color: #ca8a04; }
.sketch-box.b3 { background: rgba(34, 197, 94, 0.12); border-color: #16a34a; color: #16a34a; }
.sketch-box.b4 { background: var(--surface-soft, #f1f5f9); border-color: var(--line-strong, #64748b); color: var(--text-soft, #475569); }

.sketch-arrow {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--quadro-teal, #0d9488);
}

.sketch-handwriting {
  font-family: var(--font-handwriting, 'Caveat', cursive);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text, #1e293b);
}

.mockup-toolbar-preview {
  background: var(--surface-soft, #f8fafc);
  border-top: 1px solid var(--line, #e2e8f0);
  padding: 0.6rem;
  display: flex;
  justify-content: center;
}

.mockup-tools {
  display: flex;
  gap: 0.5rem;
  background: var(--surface, #ffffff);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-md, 6px);
  border: 1px solid var(--line, #e2e8f0);
}

.m-tool {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm, 4px);
  color: var(--text-muted, #64748b);
}

.m-tool.active {
  background: var(--quadro-teal, #0d9488);
  color: #ffffff;
}

.board-steps-grid,
.quadro-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.board-step-card {
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--radius-md, 6px);
  padding: 1.8rem 1.5rem;
  position: relative;
  box-shadow: var(--shadow-xs, 0 4px 12px rgba(0, 0, 0, 0.03));
  transition: background 0.2s ease, border-color 0.2s ease;
}

.step-num {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-muted, #64748b) !important;
  line-height: 1;
}

.step-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm, 4px);
  background: var(--surface-soft, #f0fdfa);
  color: var(--board-teal, #0d9488);
  border: 1px solid var(--line, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.board-step-card h3 {
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-size: 1.25rem;
  color: var(--text, #0b1e3d);
  margin: 0 0 0.5rem 0;
  font-weight: 700;
}

.board-step-card p {
  font-size: 0.92rem;
  color: var(--text-soft, #334155);
  line-height: 1.55;
  margin: 0;
}

.board-principles-box,
.quadro-principles-box {
  background: linear-gradient(135deg, #0b1329 0%, #111c3a 100%);
  color: #ffffff;
  border: 1px solid var(--line, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-md, 6px);
  padding: 3rem 2.5rem;
  box-shadow: var(--shadow-lg, 0 20px 40px rgba(6, 11, 23, 0.4));
}

.principles-header {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 1.5rem;
}

.principles-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm, 4px);
  background: rgba(13, 148, 136, 0.2);
  color: #2dd4bf;
  display: flex;
  align-items: center;
  justify-content: center;
}

.principles-header h2 {
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-size: 1.85rem;
  font-weight: 700;
  margin: 0 0 0.35rem 0;
  color: #ffffff;
}

.principles-header p {
  color: #94a3b8;
  margin: 0;
  font-size: 1rem;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.p-item h4 {
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-size: 1.15rem;
  margin: 0 0 0.4rem 0;
  color: #5eead4;
}

.p-item p {
  font-size: 0.88rem;
  color: #cbd5e1;
  line-height: 1.5;
  margin: 0;
}

.board-landing-footer {
  background: var(--surface, #ffffff);
  border-top: 1px solid var(--line, #e2e8f0);
  padding: 2.5rem 0;
  text-align: center;
  margin-top: 4rem;
  color: var(--text-soft, #475569);
  transition: background 0.2s ease, border-color 0.2s ease;
}

/* ==========================================================================
   APPLICATION STYLES (app.php)
   ========================================================================== */
.board-app-body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--bg, #f1f5f9);
  color: var(--text, #1e293b);
  font-family: var(--font-body, 'Plus Jakarta Sans', sans-serif);
  user-select: none;
  -webkit-user-select: none;
  transition: background 0.2s ease, color 0.2s ease;
  display: flex;
  flex-direction: column;
}

.board-top-bar {
  height: 54px;
  background: var(--surface, #ffffff);
  border-bottom: 1px solid var(--line, #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  position: relative;
  flex-shrink: 0;
  z-index: 200;
  box-shadow: var(--shadow-xs, 0 1px 3px rgba(0, 0, 0, 0.05));
  transition: background 0.2s ease, border-color 0.2s ease;
}

.top-bar-left, .top-bar-center, .top-bar-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text, #1e293b);
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-weight: 800;
  font-size: 1.05rem;
  padding-right: 0.6rem;
  border-right: 1px solid var(--line, #e2e8f0);
}

.app-brand-wordmark {
  height: 26px;
  width: auto;
  display: block;
}

.app-brand-icon {
  color: var(--quadro-teal, #0d9488);
  display: flex;
}

.lesson-title-box {
  display: flex;
  align-items: center;
  position: relative;
}

#lesson-title-input {
  border: 1px solid transparent;
  background: transparent;
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text, #1e293b);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm, 4px);
  width: 260px;
  transition: all 0.2s ease;
}

#lesson-title-input:hover {
  background: var(--surface-soft, #f8fafc);
  border-color: var(--line, #cbd5e1);
}

#lesson-title-input:focus {
  background: var(--surface, #ffffff);
  border-color: var(--quadro-teal, #0d9488);
  outline: none;
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.edit-hint {
  position: absolute;
  right: 8px;
  color: var(--text-muted, #94a3b8);
  pointer-events: none;
}

.bg-selector-group {
  display: flex;
  background: var(--surface-soft, #f1f5f9);
  padding: 3px;
  border-radius: var(--radius-sm, 4px);
  gap: 2px;
  border: 1px solid var(--line, #e2e8f0);
}

.bg-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: transparent;
  border: 1px solid transparent;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted, #475569);
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius-xs, 2px);
  cursor: pointer;
  transition: all 0.15s ease;
}

.bg-btn:hover {
  color: var(--text, #1e293b);
  background: var(--surface, rgba(255, 255, 255, 0.6));
}

.bg-btn.active {
  background: var(--surface, #ffffff);
  color: var(--quadro-teal, #0d9488);
  box-shadow: var(--shadow-xs, 0 1px 3px rgba(0, 0, 0, 0.08));
  border-color: var(--line, #e2e8f0);
}

.bg-preview {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-xs, 2px);
  border: 1px solid var(--line-strong, #cbd5e1);
}

.bg-preview.bg-white { background: #ffffff; }
.bg-preview.bg-grid { background: #ffffff; background-image: radial-gradient(#94a3b8 1px, transparent 1px); background-size: 4px 4px; }
.bg-preview.bg-lines { background: #ffffff; background-image: linear-gradient(#94a3b8 1px, transparent 1px); background-size: 100% 4px; }
.bg-preview.bg-dots { background: #ffffff; background-image: radial-gradient(#000 1px, transparent 1px); background-size: 6px 6px; }
.bg-preview.bg-dark { background: #064e3b; }

.app-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface-soft, #f8fafc);
  border: 1px solid var(--line, #e2e8f0);
  color: var(--text, #334155);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.42rem 0.75rem;
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all 0.15s ease;
}

.app-action-btn:hover {
  background: var(--surface, #ffffff);
  border-color: var(--line-strong, #cbd5e1);
  color: var(--text, #0b1e3d);
}

.app-action-btn.primary {
  background: var(--quadro-teal, #0d9488);
  border-color: var(--quadro-teal, #0d9488);
  color: #ffffff;
}

.app-action-btn.primary:hover {
  background: var(--quadro-teal-dark, #0f766e);
}

.app-icon-only-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-soft, #f8fafc);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--radius-sm, 4px);
  color: var(--text-muted, #475569);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
}

.app-icon-only-btn:hover {
  background: var(--surface, #ffffff);
  color: var(--text, #0b1e3d);
  border-color: var(--line-strong, #cbd5e1);
}

.export-dropdown-wrapper {
  position: relative;
}

.export-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #cbd5e1);
  border-radius: var(--radius-md, 6px);
  box-shadow: var(--shadow-lg, 0 10px 30px -5px rgba(0, 0, 0, 0.25));
  padding: 0.4rem;
  min-width: 220px;
  display: none;
  flex-direction: column;
  gap: 2px;
  z-index: 300;
}

.export-menu.open {
  display: flex;
}

.export-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: none;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm, 4px);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text, #334155);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
}

.export-item:hover {
  background: var(--surface-soft, #f1f5f9);
  color: var(--quadro-teal, #0d9488);
}

/* ==========================================================================
   CANVAS VIEWPORT & DRAWING AREA
   ========================================================================== */
.board-canvas-viewport {
  position: relative;
  flex: 1;
  width: 100%;
  height: 100%;
  top: auto;
  left: auto;
  right: auto;
  bottom: auto;
  background: var(--surface, #ffffff);
  overflow: hidden;
  cursor: crosshair;
  touch-action: none;
}

#board-canvas,
#board-overlay-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

#board-overlay-canvas {
  pointer-events: none;
  z-index: 10;
}

/* Fundo Dinâmico do Canvas */
.board-canvas-viewport.bg-white {
  background-color: var(--surface, #ffffff);
}

.board-canvas-viewport.bg-grid {
  background-color: var(--surface, #ffffff);
  background-image: 
    linear-gradient(to right, var(--line, #e2e8f0) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line, #e2e8f0) 1px, transparent 1px);
  background-size: 28px 28px;
}

.board-canvas-viewport.bg-lines {
  background-color: var(--surface, #ffffff);
  background-image: linear-gradient(to bottom, var(--line, #e2e8f0) 1px, transparent 1px);
  background-size: 100% 32px;
}

.board-canvas-viewport.bg-dots {
  background-color: var(--surface, #ffffff);
  background-image: radial-gradient(var(--line-strong, #cbd5e1) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
}

.board-canvas-viewport.bg-dark {
  background-color: #064e3b; /* Verde Lousa Escolar Profundo */
  background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* Editor de Texto Flutuante */
#text-editor-container {
  position: absolute;
  z-index: 50;
  pointer-events: auto;
}

.text-editor-box {
  background: var(--surface, #ffffff);
  border: 2px solid var(--quadro-teal, #0d9488);
  border-radius: var(--radius-md, 6px);
  padding: 8px;
  box-shadow: var(--shadow-md, 0 10px 25px rgba(0, 0, 0, 0.18));
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 240px;
}

#inline-text-input {
  border: none;
  background: transparent;
  font-family: var(--font-body, 'Plus Jakarta Sans', sans-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--text, #0f172a);
  padding: 4px 6px;
  outline: none;
  resize: both;
  min-width: 220px;
  min-height: 50px;
  line-height: 1.35;
}

.text-editor-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  border-top: 1px solid var(--line, #e2e8f0);
  padding-top: 6px;
}

.text-act-btn {
  border: none;
  border-radius: var(--radius-sm, 4px);
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.text-act-btn.confirm {
  background: var(--quadro-teal, #0d9488);
  color: #ffffff;
}

.text-act-btn.confirm:hover {
  background: var(--quadro-teal-dark, #0f766e);
}

.text-act-btn.cancel {
  background: var(--surface-soft, #f1f5f9);
  color: var(--text-muted, #64748b);
}

.text-act-btn.cancel:hover {
  background: var(--surface, #e2e8f0);
  color: var(--text, #0f172a);
}

/* ==========================================================================
   BARRA FLUTUANTE DE FERRAMENTAS (FLOATING TOOLBAR)
   ========================================================================== */
.board-floating-toolbar {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--radius-md, 6px);
  padding: 6px 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-lg, var(--quadro-shadow-float));
  z-index: 200;
  max-width: 95vw;
  overflow-x: auto;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.tools-cluster,
.color-palette-cluster,
.stroke-width-cluster,
.history-cluster {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tool-divider {
  width: 1px;
  height: 26px;
  background: var(--line, #e2e8f0);
  margin: 0 3px;
}

.tool-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm, 4px);
  color: var(--text-muted, #475569);
  cursor: pointer;
  transition: all 0.15s ease;
}

.tool-btn:hover {
  background: var(--surface-soft, #f1f5f9);
  color: var(--text, #0b1e3d);
}

.tool-btn.active {
  background: var(--surface-soft, #f0fdfa);
  color: var(--quadro-teal, #0d9488);
  border-color: var(--quadro-teal, #99f6e4);
}

.tool-btn.danger:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.tool-btn.laser-btn.active {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
  border-color: #ef4444;
}

/* Paleta de Cores */
.color-dot {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-xs, 2px);
  border: 1px solid rgba(0, 0, 0, 0.15);
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
  padding: 0;
}

.color-dot:hover {
  transform: scale(1.15);
}

.color-dot.active {
  border-color: var(--text, #0f172a);
  box-shadow: 0 0 0 2px var(--quadro-teal, #0d9488);
  transform: scale(1.15);
}

.color-picker-label {
  position: relative;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

#custom-color-input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.color-picker-icon {
  color: var(--text-muted, #64748b);
  display: flex;
}

/* Espessuras */
.stroke-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
}

.stroke-btn:hover {
  background: var(--surface-soft, #f1f5f9);
}

.stroke-btn.active {
  background: var(--surface-soft, #f0fdfa);
  border-color: var(--quadro-teal, #99f6e4);
}

.stroke-preview {
  background: var(--text-soft, #334155);
  border-radius: 1px;
  display: block;
}

.zoom-text {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted, #475569);
  min-width: 42px;
  text-align: center;
  cursor: pointer;
}

/* ==========================================================================
   BARRA DE PÁGINAS (CANTO INFERIOR ESQUERDO)
   ========================================================================== */
.board-pages-bar {
  position: fixed;
  bottom: 76px;
  left: 20px;
  background: var(--surface, rgba(255, 255, 255, 0.96));
  backdrop-filter: blur(10px);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--radius-md, 6px);
  padding: 5px 8px;
  display: flex;
  align-items: center;
  gap: 5px;
  box-shadow: var(--shadow-md, var(--quadro-shadow-float));
  z-index: 200;
  transition: bottom 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-nav-btn {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm, 4px);
  color: var(--text-muted, #475569);
  cursor: pointer;
}

.page-nav-btn:hover {
  background: var(--surface-soft, #f1f5f9);
  color: var(--text, #0b1e3d);
}

.pages-indicator {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text, #334155);
  padding: 0 4px;
}

.pages-divider {
  width: 1px;
  height: 20px;
  background: var(--line, #e2e8f0);
  margin: 0 2px;
}

.page-action-btn {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--surface-soft, #f8fafc);
  border: 1px solid var(--line, #e2e8f0);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--text, #334155);
  padding: 0.32rem 0.6rem;
  border-radius: var(--radius-sm, 4px);
  cursor: pointer;
  transition: all 0.15s ease;
}

.page-action-btn:hover {
  background: var(--surface, #ffffff);
  color: var(--quadro-teal, #0d9488);
  border-color: var(--line-strong, #cbd5e1);
}

.page-action-btn.danger:hover {
  color: #dc2626;
  border-color: #fca5a5;
  background: rgba(239, 68, 68, 0.1);
}

/* ==========================================================================
   TOAST & MODAIS
   ========================================================================== */
.board-toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--surface, #0b1329);
  color: var(--text, #ffffff);
  border: 1px solid var(--line, rgba(255, 255, 255, 0.1));
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-sm, 4px);
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.84rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-lg, 0 8px 24px rgba(0, 0, 0, 0.3));
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 1000;
}

.board-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.board-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(6, 11, 23, 0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.board-modal-card {
  background: var(--surface, #ffffff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--radius-md, 6px);
  max-width: 520px;
  width: 90vw;
  box-shadow: var(--shadow-lg, 0 25px 50px -12px rgba(0, 0, 0, 0.25));
  overflow: hidden;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.modal-header {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--line, #e2e8f0);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.modal-title-group h3 {
  margin: 0;
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  font-size: 1.25rem;
  color: var(--text, #0b1e3d);
  font-weight: 700;
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted, #94a3b8);
  cursor: pointer;
}

.modal-body {
  padding: 1.5rem;
  color: var(--text, #1e293b);
}

.modal-footer {
  padding: 1rem 1.5rem;
  background: var(--surface-soft, #f8fafc);
  border-top: 1px solid var(--line, #e2e8f0);
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

.share-option-card {
  background: var(--surface-soft, #f8fafc);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--radius-md, 6px);
  padding: 1rem;
  margin-bottom: 0.8rem;
}

.share-option-card h4 {
  margin: 0 0 0.35rem 0;
  font-family: var(--font-heading, 'Newsreader', Georgia, serif);
  color: var(--text, #0b1e3d);
  font-size: 1.05rem;
  font-weight: 700;
}

.share-option-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-soft, #334155);
  line-height: 1.5;
}

/* ==========================================================================
   RESPONSIVIDADE & AJUSTES MOBILE / TABLET
   ========================================================================== */
@media (max-width: 860px) {
  #lesson-title-input {
    width: 140px;
  }
  .bg-selector-group {
    display: none;
  }
  .app-action-btn .btn-label {
    display: none;
  }
  .board-floating-toolbar {
    bottom: 10px;
    padding: 4px 6px;
  }
  .board-pages-bar {
    bottom: 64px;
    left: 10px;
  }
}

@media (max-width: 640px) {
  .board-landing-nav,
  .quadro-landing-nav {
    align-items: stretch;
    flex-direction: column;
  }

  .board-brand,
  .quadro-brand,
  .board-brand-text,
  .quadro-brand-text,
  .board-nav-actions,
  .quadro-nav-actions {
    min-width: 0;
    max-width: 100%;
  }

  .board-nav-actions,
  .quadro-nav-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .board-nav-actions > a,
  .quadro-nav-actions > a {
    justify-content: center;
    min-width: 0;
    width: 100%;
  }

  .board-hero-title {
    font-size: clamp(2rem, 12vw, 2.6rem);
    overflow-wrap: anywhere;
  }

  .board-privacy-tag,
  .quadro-privacy-tag {
    border-radius: var(--radius-sm, 4px);
    max-width: 100%;
    text-align: left;
  }

  .mockup-toolbar-preview {
    justify-content: flex-start;
    overflow-x: auto;
  }

  .mockup-tools {
    flex: 0 0 auto;
  }
}

/* ==========================================================================
   BOTÃO FLUTUANTE VOLTAR AO TOPO (LANDING PAGE)
   ========================================================================== */
.btn-back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm, 4px);
  background: var(--surface, #0b1329);
  color: var(--text, #ffffff);
  border: 1px solid var(--line, rgba(255, 255, 255, 0.18));
  box-shadow: var(--shadow-md, 0 8px 24px rgba(6, 11, 23, 0.3));
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              background 0.2s ease,
              box-shadow 0.2s ease;
}

.btn-back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.btn-back-to-top:hover {
  background: var(--quadro-teal, #0d9488);
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg, 0 12px 28px rgba(13, 148, 136, 0.38));
}

.btn-back-to-top:active {
  transform: translateY(0);
}

@media (max-width: 768px) {
  .btn-back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}

/* Contraste e Acessibilidade */
.home-hero-badge { color: var(--quadro-teal, #0f766e) !important; }
.step-num { color: var(--text-muted, #64748b) !important; }

/* ==========================================================================
   CABEÇALHO CANÔNICO DO ECOSSISTEMA — BOTÕES GHOST 34x34px & RESPONSIVIDADE
   ========================================================================== */
.phm-ecosystem-header .phm-projects-menu > summary,
.phm-ecosystem-header .phm-hub-back {
  width: 34px !important;
  min-width: 34px !important;
  height: 34px !important;
  min-height: 34px !important;
  padding: 0 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  border: 1px solid transparent !important;
  border-radius: 4px !important;
  background: transparent !important;
  box-shadow: none !important;
  color: var(--text-soft, #475569) !important;
  transition: all var(--transition, 0.15s ease);
}

.phm-ecosystem-header .phm-projects-menu > summary::-webkit-details-marker {
  display: none !important;
}

.phm-ecosystem-header .phm-projects-menu > summary span,
.phm-ecosystem-header .phm-projects-menu > summary svg:last-child,
.phm-ecosystem-header .phm-hub-back span {
  display: none !important;
}

.phm-ecosystem-header .phm-projects-menu > summary svg:first-child,
.phm-ecosystem-header .phm-hub-back svg {
  margin: 0 !important;
}

.phm-ecosystem-header .phm-projects-menu > summary:hover,
.phm-ecosystem-header .phm-projects-menu[open] > summary,
.phm-ecosystem-header .phm-hub-back:hover {
  border-color: var(--line, #e2e8f0) !important;
  background: var(--surface-soft, #f1f5f9) !important;
  color: var(--quadro-teal, #0d9488) !important;
}

[data-theme="dark"] .phm-ecosystem-header .phm-projects-menu > summary,
[data-theme="dark"] .phm-ecosystem-header .phm-hub-back {
  color: #94a3b8 !important;
}

[data-theme="dark"] .phm-ecosystem-header .phm-projects-menu > summary:hover,
[data-theme="dark"] .phm-ecosystem-header .phm-projects-menu[open] > summary,
[data-theme="dark"] .phm-ecosystem-header .phm-hub-back:hover {
  background: rgba(255, 255, 255, 0.08) !important;
  border-color: rgba(255, 255, 255, 0.12) !important;
  color: #2dd4bf !important;
}

[data-theme="sepia"] .phm-ecosystem-header .phm-projects-menu > summary,
[data-theme="sepia"] .phm-ecosystem-header .phm-hub-back {
  color: #715842 !important;
}

[data-theme="sepia"] .phm-ecosystem-header .phm-projects-menu > summary:hover,
[data-theme="sepia"] .phm-ecosystem-header .phm-projects-menu[open] > summary,
[data-theme="sepia"] .phm-ecosystem-header .phm-hub-back:hover {
  background: rgba(67, 52, 34, 0.08) !important;
  border-color: rgba(67, 52, 34, 0.15) !important;
  color: #78350f !important;
}

.phm-ecosystem-header .menu-toggle {
  display: none !important;
}

@media (max-width: 900px) {
  .phm-ecosystem-header .menu-toggle {
    display: inline-flex !important;
    width: 34px !important;
    min-width: 34px !important;
    height: 34px !important;
    min-height: 34px !important;
    padding: 0 !important;
    align-items: center !important;
    justify-content: center !important;
    border: 1px solid transparent !important;
    border-radius: 4px !important;
    background: transparent !important;
    box-shadow: none !important;
    color: var(--text-soft, #475569) !important;
    cursor: pointer;
    transition: all var(--transition, 0.15s ease);
  }
  .phm-ecosystem-header .menu-toggle:hover {
    border-color: var(--line, #e2e8f0) !important;
    background: var(--surface-soft, #f1f5f9) !important;
    color: var(--quadro-teal, #0d9488) !important;
  }
  [data-theme="dark"] .phm-ecosystem-header .menu-toggle {
    color: #94a3b8 !important;
  }
  [data-theme="dark"] .phm-ecosystem-header .menu-toggle:hover {
    background: rgba(255, 255, 255, 0.08) !important;
    border-color: rgba(255, 255, 255, 0.12) !important;
    color: #2dd4bf !important;
  }
  [data-theme="sepia"] .phm-ecosystem-header .menu-toggle {
    color: #715842 !important;
  }
  [data-theme="sepia"] .phm-ecosystem-header .menu-toggle:hover {
    background: rgba(67, 52, 34, 0.08) !important;
    border-color: rgba(67, 52, 34, 0.15) !important;
    color: #78350f !important;
  }
  .phm-ecosystem-header .header-editorial-nav {
    display: none !important;
  }
  .phm-ecosystem-header .header-editorial-nav.open {
    display: flex !important;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--surface, #0b1329);
    border-bottom: 1px solid var(--line, rgba(255, 255, 255, 0.1));
    padding: 1rem 1.25rem;
    gap: 0.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    z-index: 999;
  }
  [data-theme="light"] .phm-ecosystem-header .header-editorial-nav.open {
    background: #ffffff;
    border-bottom-color: var(--line, #e2e8f0);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  }
}

@media (max-width: 480px) {
  .phm-ecosystem-header .phm-ecosystem-header__inner {
    padding-inline: 0.5rem !important;
    gap: 0.25rem !important;
  }
  .phm-ecosystem-header .phm-ecosystem-header__actions {
    gap: 0.2rem !important;
  }
}

/* Salvaguarda de Acessibilidade: Skip Link fora do fluxo visual quando não focado */
.phm-skip-link {
  position: absolute !important;
  top: -9999px !important;
  left: 1rem !important;
  z-index: 999999 !important;
  padding: 0.5rem 1rem !important;
  background: #0f172a !important;
  color: #2dd4bf !important;
  border: 1px solid #2dd4bf !important;
  border-radius: 4px !important;
  font-family: var(--font-body, system-ui, sans-serif) !important;
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  text-decoration: none !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.phm-skip-link:focus,
.phm-skip-link:focus-visible {
  top: 1rem !important;
  opacity: 1 !important;
  pointer-events: auto !important;
  outline: 2px solid #2dd4bf !important;
}