*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  height: 100vh;
  overflow: hidden;
  background: #f6f8fa;
}

/* ===================== AUTH GATE ===================== */
#auth-gate {
  position: fixed;
  inset: 0;
  background: #f6f8fa;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.auth-box {
  background: white;
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.12);
  width: 100%;
  max-width: 480px;
  text-align: center;
}

.auth-box h1 { font-size: 1.5rem; margin-bottom: 0.4rem; color: #1a1a2e; }
.auth-box p  { color: #666; margin-bottom: 1.5rem; font-size: 0.9rem; }

.auth-box input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  margin-bottom: 1rem;
  outline: none;
  transition: border-color 0.15s;
}
.auth-box input:focus { border-color: #0366d6; }

.btn-primary {
  width: 100%;
  padding: 0.75rem;
  background: #0366d6;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary:hover    { background: #0255b3; }
.btn-primary:disabled { background: #ccc; cursor: not-allowed; }

#auth-error {
  color: #d73a49;
  font-size: 0.875rem;
  margin-top: 0.75rem;
  display: none;
}

/* ===================== LOADING GATE ===================== */
#loading-gate {
  position: fixed;
  inset: 0;
  background: #f6f8fa;
  z-index: 200;
}

/* ===================== EDITOR APP ===================== */
#editor-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Toolbar */
#toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: #24292e;
  color: white;
  flex-shrink: 0;
}

#toolbar-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: #e1e4e8;
  margin-right: auto;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-tool {
  padding: 0.4rem 0.8rem;
  border: 1px solid #555;
  background: transparent;
  color: #e1e4e8;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-tool:hover    { background: #444; border-color: #888; }
.btn-tool.active   { background: #0366d6; border-color: #0366d6; color: white; }
.btn-tool.btn-save { background: #2ea44f; border-color: #2ea44f; color: white; }
.btn-tool.btn-save:hover { background: #22863a; }
.btn-tool.btn-save:disabled { background: #94d3a2; border-color: #94d3a2; cursor: not-allowed; }

/* Hamburger menu */
#btn-menu { display: none; }

#toolbar-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (max-width: 640px) {
  #toolbar { position: relative; }

  #btn-menu { display: block; }

  #toolbar-menu {
    display: none;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 100%;
    right: 0;
    background: #2d3339;
    border: 1px solid #444;
    border-top: none;
    border-radius: 0 0 8px 8px;
    padding: 0.4rem;
    gap: 0.3rem;
    z-index: 50;
    min-width: 160px;
  }

  #toolbar-menu.open { display: flex; }

  #toolbar-menu .btn-tool {
    text-align: left;
    padding: 0.5rem 0.75rem;
  }

  #btn-preview-fs {
    font-size: 1rem !important;
    padding: 0.1rem 0.45rem;
    min-width: 30px;
    line-height: 1;
  }
}

/* Token help */
.token-help {
  margin-top: 1.5rem;
  text-align: left;
  background: #f6f8fa;
  border: 1px solid #e1e4e8;
  border-radius: 8px;
  padding: 1rem 1.2rem;
  font-size: 0.82rem;
  color: #444;
}
.token-help-title {
  font-weight: 600;
  color: #24292e;
  margin-bottom: 0.5rem;
}
.token-help ol {
  padding-left: 1.2rem;
  line-height: 1.7;
}
.token-help li { margin-bottom: 0.2rem; }

/* Work area */
#work-area {
  display: flex;
  flex: 1;
  overflow: hidden;
}

#editor-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Preview resizer */
#preview-resizer {
  width: 5px;
  background: #e1e4e8;
  cursor: col-resize;
  flex-shrink: 0;
  position: relative;
  transition: background 0.15s;
  z-index: 1;
}
#preview-resizer:hover,
#preview-resizer.dragging { background: #0366d6; }
#preview-resizer.snap     { background: #0366d6; }
#preview-resizer.snap::after {
  content: '50%';
  position: absolute;
  top: calc(50% - 10px);
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6rem;
  color: white;
  font-weight: 700;
  background: #0366d6;
  padding: 1px 4px;
  border-radius: 3px;
  white-space: nowrap;
}

#markdown-input {
  flex: 1;
  padding: 1rem 1.2rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.88rem;
  line-height: 1.65;
  border: none;
  outline: none;
  resize: none;
  overflow: auto;
  background: #fff;
  color: #24292e;
  tab-size: 2;
  padding-bottom: 3rem;
}

#preview-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: white;
  min-width: 0;
  overflow: hidden;
}
#preview-pane.hidden { display: none; }

#preview-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: #f6f8fa;
  border-bottom: 1px solid #e1e4e8;
  flex-shrink: 0;
}
#preview-header span { flex: 1; font-size: 0.82rem; font-weight: 600; color: #333; }
#preview-header .btn-tool { border-color: #bbb; color: #555; padding: 0.2rem 0.6rem; font-size: 0.75rem; white-space: nowrap; }

#preview-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 2rem 3rem;
}

/* Preview typography */
#preview-content { max-width: 760px; color: #24292e; line-height: 1.6; }
#preview-content h1 { font-size: 1.75rem; border-bottom: 1px solid #eee; padding-bottom: 0.3rem; margin: 0 0 1rem; }
#preview-content h2 { font-size: 1.25rem; margin: 1.5rem 0 0.5rem; border-bottom: 1px solid #f0f0f0; padding-bottom: 0.2rem; }
#preview-content h3 { font-size: 1.05rem; margin: 1rem 0 0.35rem; }
#preview-content p  { margin-bottom: 0.75rem; }
#preview-content ul, #preview-content ol { padding-left: 1.5rem; margin-bottom: 0.75rem; }
#preview-content li { margin-bottom: 0.2rem; }
#preview-content table { border-collapse: collapse; width: 100%; margin-bottom: 1rem; font-size: 0.9rem; }
#preview-content td, #preview-content th { border: 1px solid #ddd; padding: 0.45rem 0.6rem; text-align: left; }
#preview-content th { background: #f6f8fa; font-weight: 600; }
#preview-content blockquote { border-left: 4px solid #ddd; padding: 0.2rem 1rem; color: #555; margin: 0 0 0.75rem; }
#preview-content img { max-width: 200px; border-radius: 50%; }
#preview-content a { color: #0366d6; }
/* Mostra visivamente l'interruzione di pagina nell'anteprima */
#preview-content .page-break {
  border-top: 2px dashed #ccc;
  margin: 1.5rem 0 1rem;
  position: relative;
}
#preview-content .page-break::after {
  content: "interruzione pagina (PDF)";
  position: absolute;
  top: -0.65rem;
  left: 50%;
  transform: translateX(-50%);
  background: white;
  padding: 0 0.5rem;
  font-size: 0.7rem;
  color: #aaa;
  white-space: nowrap;
}

/* Legend */
#legend-section {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #f6f8fa;
  border-top: 1px solid #e1e4e8;
  z-index: 20;
}

#legend-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 1.2rem;
  cursor: pointer;
}
#legend-header span { font-size: 0.82rem; font-weight: 600; color: #333; }
#legend-header .btn-tool { border-color: #bbb; color: #555; padding: 0.15rem 0.5rem; font-size: 0.8rem; }

#legend-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  border-top: 1px solid #e1e4e8;
}
#legend-section.open #legend-body { max-height: 280px; overflow-y: auto; }

#legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.35rem 2rem;
  padding: 0.9rem 1.2rem 1rem;
  font-size: 0.78rem;
  user-select: text;
  -webkit-user-select: text;
}

.legend-group-title {
  grid-column: 1 / -1;
  font-weight: 700;
  color: #333;
  margin-top: 0.5rem;
  margin-bottom: 0.1rem;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.legend-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  line-height: 1.5;
}
.legend-item code {
  background: #e1e4e8;
  padding: 0.05rem 0.35rem;
  border-radius: 4px;
  font-size: 0.76rem;
  white-space: nowrap;
  flex-shrink: 0;
  user-select: text;
  -webkit-user-select: text;
  cursor: text;
}
.legend-item span { color: #555; }
.legend-item.full { grid-column: 1 / -1; flex-direction: column; gap: 0.2rem; }
.legend-item.full code { white-space: pre-wrap; word-break: break-all; }

/* Photo modal */
#photo-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 200;
  align-items: center;
  justify-content: center;
}
#photo-modal.open { display: flex; }

.photo-modal-box {
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.25);
  padding: 2rem;
  max-width: 360px;
  width: 100%;
  text-align: center;
}
.photo-modal-box h2 { font-size: 1.15rem; margin-bottom: 1.25rem; color: #24292e; }

#photo-preview-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}
#photo-preview-canvas {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 3px solid #e1e4e8;
}

.photo-modal-hint {
  font-size: 0.8rem;
  color: #666;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}
.photo-modal-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}
.photo-modal-actions .btn-tool {
  border-color: #555;
  color: #24292e;
  background: white;
}
.photo-modal-actions .btn-tool:hover { background: #f6f8fa; }

/* Toast notification */
#toast {
  position: fixed;
  bottom: 2.6rem;
  left: 0;
  right: 0;
  padding: 0.4rem 1rem;
  font-size: 0.75rem;
  color: #666;
  background: #f6f8fa;
  border-top: 1px solid #e1e4e8;
  border-bottom: 1px solid #e1e4e8;
  z-index: 30;
}
#toast.error   { color: #d73a49; background: #ffeef0; border-color: #f9c4c9; }
#toast.success { color: #1a6b2a; background: #dcffe4; border-color: #a4e4b4; }
#toast.loading { color: #0366d6; background: #f1f8ff; border-color: #c8e1fb; }

/* Preview centered (when allarga) */
#preview-scroll.preview-centered #preview-content { margin: 0 auto; }