/* =============================================
   SheetApp — sheet.css
   Sheet Viewer, OSMD, Chord Features, Page Bar
   ============================================= */

/* ---- SHEET VIEWER WRAPPER ---- */
.sheet-viewer-wrapper {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  background: #eef0f7;
  scroll-behavior: smooth;
}

/* ---- WELCOME SCREEN ---- */
.welcome-screen { display: flex; align-items: center; justify-content: center; min-height: 100%; padding: 3rem 1.5rem; }
.welcome-content { text-align: center; max-width: 480px; }
.welcome-icon { font-size: 4rem; margin-bottom: 1rem; animation: float 3s ease-in-out infinite; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
.welcome-content h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: .6rem; }
.welcome-content p { color: var(--text-secondary); font-size: .95rem; margin-bottom: 1.75rem; }
.welcome-features { display: flex; flex-direction: column; gap: .75rem; text-align: left; background: var(--bg-surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.75rem; }
.feature-item { display: flex; align-items: flex-start; gap: .75rem; }
.feat-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: .1rem; }
.feature-item strong { display: block; font-size: .875rem; margin-bottom: .1rem; }
.feature-item small { color: var(--text-muted); font-size: .775rem; }

/* ---- LOADING SCREEN ---- */
.loading-screen { display: flex; align-items: center; justify-content: center; min-height: 100%; }
.spinner-wrap { text-align: center; }
.spinner { width: 48px; height: 48px; border: 3px solid var(--bg-raised); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; margin: 0 auto 1rem; }
@keyframes spin { to { transform: rotate(360deg); } }
.spinner-wrap p { color: var(--text-secondary); font-size: .875rem; }

/* ---- SHEET AREA ---- */
.sheet-area { position: relative; }

/* ---- PAGE BAR ---- */
.page-bar { display: flex; align-items: center; justify-content: space-between; padding: .4rem 1.25rem; background: rgba(255,255,255,.9); border-bottom: 1px solid var(--border); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 40; flex-shrink: 0; gap: 1rem; }
.page-bar-left  { display: flex; align-items: center; gap: .5rem; flex-shrink: 0; }
.page-bar-right { display: flex; align-items: center; gap: .6rem; flex-shrink: 0; }
.page-indicator { font-size: .75rem; font-weight: 600; color: var(--text-secondary); font-family: var(--font-mono); min-width: 80px; text-align: center; }
.add-chord-hint { font-size: .78rem; color: var(--accent); font-weight: 500; animation: fadeIn .25s ease; white-space: nowrap; }
.link-btn { background: none; border: none; color: var(--danger); cursor: pointer; font-size: .78rem; font-weight: 600; text-decoration: underline; padding: 0; white-space: nowrap; }
#btn-add-chord-mode.active { background: rgba(109,40,217,.1); border-color: rgba(109,40,217,.4); color: var(--accent); }

@media (max-width: 768px) {
  .page-bar { overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .page-bar::-webkit-scrollbar { display: none; }
  .osmd-container { padding: 1.5rem 1rem; }
}

/* ---- OSMD CONTAINER ---- */
.osmd-container { position: relative; padding: 2.5rem 2rem; max-width: 860px; margin: 2rem auto; background: #ffffff; border-radius: var(--radius); box-shadow: 0 2px 20px rgba(109,40,217,.10), 0 1px 4px rgba(0,0,0,.06); min-height: 400px; }
.osmd-container svg { width: 100%; height: auto; display: block; }

/* ---- CHORD SET BAR ---- */
.chord-set-bar {
  display: flex;
  align-items: center;
  gap: .4rem;
  background: rgba(109,40,217,.06);
  border: 1px solid rgba(109,40,217,.2);
  border-radius: 6px;
  padding: .2rem .5rem;
  font-size: .78rem;
}
.chord-set-label {
  display: flex;
  align-items: center;
  gap: .25rem;
  font-size: .72rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.chord-set-select {
  border: none;
  background: transparent;
  font-size: .78rem;
  font-weight: 700;
  color: var(--accent);
  cursor: pointer;
  min-width: 100px;
  max-width: 160px;
  outline: none;
  padding: .1rem .2rem;
}
.chord-set-select:disabled { color: var(--text-muted); cursor: default; }
.btn.btn-xs { font-size: .72rem; padding: .2rem .55rem; line-height: 1.4; border-radius: 5px; }
.btn.btn-outline-primary {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
}
.btn.btn-outline-primary:hover {
  background: rgba(109,40,217,.1);
}

/* ---- CC POPUP (chord entry popup) ---- */
.cc-popup {
  animation: ccPopIn .14s ease;
}
@keyframes ccPopIn {
  from { opacity:0; transform: translateX(-50%) translateY(6px) translateY(-100%); }
  to   { opacity:1; transform: translateX(-50%) translateY(0) translateY(-100%); }
}


/* ---- CHORD DOT LAYER ---- */
.osmd-wrapper { position: relative; }

.chord-dot-layer { position: absolute; inset: 0; pointer-events: none; z-index: 60; overflow: visible; }

/* Nút tròn "+" — chỉ hiện khi .dots-visible */
.chord-dot-btn {
  display: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: rgba(109, 40, 217, 0.75);
  border: none;
  color: #fff;
  font-size: 15px; line-height: 17px;
  text-align: center;
  transition: background .15s, transform .15s;
  box-shadow: 0 1px 4px rgba(109,40,217,.4);
}
.chord-dot-btn span { display:block; }
.chord-dot-btn:hover {
  background: rgba(109, 40, 217, 1);
  transform: translateX(-50%) scale(1.3) !important;
}

/* Chỉ hiện nút khi layer có class dots-visible */
.dots-visible .chord-dot-btn { display: block; }

/* Chữ hợp âm — LUÔN hiện */
.chord-dot-text {
  font-size: .72rem;
  font-weight: 800;
  font-family: var(--font-mono, monospace);
  color: #c00;
  white-space: nowrap;
  padding: 0 2px;
  border-radius: 3px;
  transition: background .12s;
}
.chord-dot-text:hover { background: rgba(200,0,0,.1); }

/* ---- CHORD ENTRY POPUP ---- */
.chord-entry-popup {
  background: #fff;
  border: 1.5px solid var(--accent, #6d28d9);
  border-radius: 8px;
  padding: .6rem .75rem;
  box-shadow: 0 8px 28px rgba(109,40,217,.22);
  min-width: 200px;
  animation: cepIn .14s ease;
  pointer-events: auto;
}
@keyframes cepIn {
  from { opacity:0; transform: translateX(-50%) translateY(6px); }
  to   { opacity:1; transform: translateX(-50%) translateY(0); }
}
.cep-label {
  font-size: .68rem; font-weight: 700; color: var(--accent, #6d28d9);
  text-transform: uppercase; letter-spacing: .5px; margin-bottom: .4rem;
}
.cep-input {
  width: 100%; box-sizing: border-box;
  border: 1px solid var(--border, #ddd); border-radius: 5px;
  padding: .3rem .55rem; font-size: .92rem; font-weight: 700;
  font-family: var(--font-mono, monospace); color: #c00;
  outline: none; background: #fff; margin-bottom: .4rem;
}
.cep-input:focus { border-color: var(--accent, #6d28d9); box-shadow: 0 0 0 3px rgba(109,40,217,.15); }
.cep-actions { display: flex; gap: .35rem; justify-content: flex-end; }



/* ---- STAGE DARK MODE ---- */
body.dark-mode .sheet-viewer-wrapper {
  background: #111827;
}
body.dark-mode .osmd-container {
  filter: invert(0.93) hue-rotate(180deg);
  box-shadow: 0 4px 25px rgba(0,0,0,0.6);
}
body.dark-mode .page-bar {
  background: rgba(17, 24, 39, 0.9);
  border-bottom-color: #374151;
}
body.dark-mode .page-indicator,
body.dark-mode .chord-set-label {
  color: #9ca3af;
}
body.dark-mode .chord-set-bar {
  background: rgba(109,40,217,.2);
  border-color: rgba(109,40,217,.4);
}

/* ---- PRINT STYLES ---- */
@media print {
  .sidebar,.toolbar,.session-panel,.modal-overlay,.toast-container,
  #welcome-screen,#loading-screen { display: none !important; }
  body { display: block !important; background: #fff !important; color: #000 !important; overflow: visible !important; }
  .main-content { display: block !important; overflow: visible !important; }
  .sheet-viewer-wrapper { overflow: visible !important; height: auto !important; }
  .osmd-container { display: block !important; padding: 0 !important; max-width: 100% !important; margin: 0 !important; }
  .osmd-container svg { width: 100% !important; height: auto !important; page-break-inside: avoid; }
  .osmd-container svg path, .osmd-container svg text { fill: #000 !important; stroke: #000 !important; }
}