/* Solfege Tower — Melody Tower + Chord Tower in one frame.
   The tower styles are the pair's shared style.css; the sidebar became a pop-out menu. */

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #fff;
  font-family: 'EB Garamond', Garamond, 'Times New Roman', Times, serif;
  -webkit-text-size-adjust: 100%;
}
[hidden] { display: none !important; }

/* ---- the stage: the whole frame, the towers centred and as big as it allows ---- */
#stage {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.tower {
  position: relative;
  flex: none;
}
.grid {
  position: relative;
  width: 100%;
  height: 100%;
  touch-action: none;
}

/* ---- cells and note buttons (shared tower design) ---- */
.cell, .note-button {
  border-radius: 1vmin;
  position: absolute;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: bold;
  color: white;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  transition: transform 0.1s, background-color 0.3s, font-size 0.2s, color 0.3s;
  outline: none;
  min-width: 0;
  min-height: 0;
  background: transparent;
  z-index: 1;
  font-family: 'EB Garamond', Garamond, 'Times New Roman', Times, serif;
  letter-spacing: 0.02em;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}
.note-button { z-index: 2; cursor: pointer; }
.note-button.altered { box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.85); }   /* bent to a held chord's note */
.active { transform: scale(1.30); z-index: 10; }

.cell img.solfege-img {
  max-width: 80%;
  max-height: 80%;
  width: auto;
  height: auto;
  display: block;
  pointer-events: none;
  user-select: none;
  margin: auto;
  background: transparent;
}

/* Naming toggle in cell 6d */
.toggle-cell-border { border: 2px solid #ddd; box-sizing: border-box; }
.chord-toggle-btn {
  padding: 0;
  margin: 0;
  background: white;
  border: 1px solid #ccc;
  border-radius: 1vmin;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: inherit;
  line-height: 1;
  overflow: hidden;
  font-family: 'EB Garamond', Garamond, 'Times New Roman', Times, serif;
  font-weight: bold;
  color: #222;
  cursor: pointer;
  outline: none;
  transition: background 0.15s, color 0.15s;
  user-select: none;
}
.chord-toggle-btn:hover { background: #f4f8ff; }
.chord-toggle-btn:focus-visible { outline: 2px solid #007AFF; }
.stepped-labels {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  gap: 2px;
  font-family: 'EB Garamond', Garamond, 'Times New Roman', Times, serif;
  font-weight: bold;
  line-height: 1;
  color: #222;
  user-select: none;
  pointer-events: none;
}
.stepped-letters .step { font-size: 0.52em; display: inline-block; line-height: 1; }
.stepped-solfege .step { font-size: 0.38em; display: inline-block; line-height: 1; letter-spacing: -0.02em; }
.stepped-romans .step { font-size: 0.46em; display: inline-block; line-height: 1; letter-spacing: -0.02em; }
.stepped-labels .step-1 { transform: translateY(28%); }
.stepped-labels .step-2 { transform: translateY(0%); }
.stepped-labels .step-3 { transform: translateY(-28%); }
.accidental { font-size: 0.75em; position: relative; top: -0.15em; }

/* 8va in cell 5d (melody) */
.octave-btn {
  width: 100%;
  height: 100%;
  border: 1px solid #ccc;
  border-radius: 1vmin;
  background-color: white;
  color: black;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: 'EB Garamond', Garamond, 'Times New Roman', Times, serif;
  transition: background-color 0.2s ease, color 0.2s ease;
  user-select: none;
}
.octave-btn.active { background-color: #34C759 !important; color: white !important; transform: none !important; }
.octave-sup { vertical-align: top; font-size: 0.75em; position: relative; top: -0.4em; }

/* ---- the menu button: just an icon, top left ---- */
.menu-button {
  position: fixed;
  top: 8px;
  left: 8px;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.15);
  background: #001f3f;
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 50;
  transition: transform 0.15s, background-color 0.4s ease;
}
.menu-button svg { width: 20px; height: 20px; display: block; }
.menu-button:hover { transform: scale(1.06); }
.menu-button:focus-visible { outline: 2px solid #fff; outline-offset: 2px; box-shadow: 0 0 0 4px rgba(0,0,0,0.35); }
.menu-open .menu-button { visibility: hidden; }

/* ---- the menu: an overlay, so the towers never lose space to it ---- */
.menu { position: fixed; inset: 0; z-index: 60; }
.menu-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.18); }
.menu-panel {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 270px;
  max-width: calc(100vw - 16px);
  max-height: calc(100% - 16px);
  overflow-y: auto;
  box-sizing: border-box;
  padding: clamp(10px, 1.8vh, 16px) clamp(10px, 1.5vw, 14px) clamp(12px, 2vh, 18px);
  border-radius: 14px;
  background: #001f3f;
  border: 2px solid #001a33;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: clamp(8px, 1.8vh, 16px);
  animation: slideIn 0.2s ease-out;
  transition: background-color 0.4s ease, border-color 0.4s ease;
}
.menu-close {
  position: absolute;
  top: 6px;
  right: 8px;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  font-family: inherit;
}
.menu-close:hover { background: rgba(255, 255, 255, 0.32); }

.back-hub-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.2s ease;
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
}
.back-hub-btn:hover { background: rgba(255, 255, 255, 0.28); color: #38bdf8; border-color: #38bdf8; }

.app-title {
  font-family: 'Pacifico', cursive;
  margin: clamp(2px, 0.6vh, 4px) 0;
  font-size: clamp(18px, 3.5vh, 26px);
  font-weight: normal;
  color: white;
  text-align: center;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.35);
  user-select: none;
}

.sidebar-section { display: flex; flex-direction: column; gap: clamp(4px, 1vh, 6px); width: 100%; }
.sidebar-section-title {
  font-size: clamp(0.8rem, 1.8vh, 1.1rem);
  font-weight: bold;
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 1px 1px 2px rgba(0,0,0,0.4);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-left: 2px;
}
.control-row { display: flex; flex-direction: row; gap: 8px; width: 100%; align-items: stretch; }

.control-area {
  outline: none;
  border-radius: clamp(5px, 1vmin, 8px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.78rem, 1.6vh, 1rem);
  padding: clamp(0.25em, 0.8vh, 0.45em) clamp(0.35em, 0.8vw, 0.6em);
  background: #fff;
  color: #333;
  white-space: nowrap;
  margin: 0;
  font-family: inherit;
  transition: background-color 0.3s, color 0.3s, box-shadow 0.2s;
  cursor: pointer;
  border: 1px solid #ddd;
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);
  box-sizing: border-box;
}
.control-area:focus-visible { box-shadow: 0 0 0 3px rgba(255,255,255,0.7); }
.key-control { flex: 1.1; min-width: 0; justify-content: space-between; }
.key-control #key-name { font-weight: bold; font-size: clamp(0.85rem, 1.8vh, 1.15rem); }
.scale-control { flex: 1.4; min-width: 0; }
.scale-dropdown {
  background: transparent;
  border: none;
  font-size: clamp(0.75rem, 1.5vh, 0.95rem);
  font-family: inherit;
  color: inherit;
  cursor: pointer;
  outline: none;
  padding: 0;
  margin: 0;
  text-align: center;
  text-align-last: center;
  width: 100%;
  font-weight: 600;
  -moz-appearance: none;
  -webkit-appearance: none;
  appearance: none;
}
.timbre-row { display: flex; align-items: center; gap: 8px; width: 100%; }
.timbre-label {
  flex: 0 0 3.6em;
  color: rgba(255, 255, 255, 0.95);
  font-weight: bold;
  font-size: clamp(0.78rem, 1.6vh, 1rem);
  text-shadow: 1px 1px 2px rgba(0,0,0,0.4);
  margin-left: 2px;
}
.timbre-control { flex: 1; min-width: 0; justify-content: space-between; padding: clamp(0.3em, 0.8vh, 0.5em) clamp(0.4em, 1vw, 0.8em); }
.timbre-control .waveform-name { font-weight: 600; text-transform: capitalize; font-size: clamp(0.75rem, 1.5vh, 0.95rem); }
.arrow { cursor: pointer; padding: 0.2em 0.4em; user-select: none; font-size: 1.1em; font-family: inherit; transition: transform 0.1s; }
.arrow:hover { transform: scale(1.2); }

/* Tower: Melody / Chord / Both */
.seg {
  display: flex;
  width: 100%;
  background: #fff;
  border-radius: clamp(5px, 1vmin, 8px);
  border: 1px solid #ddd;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}
.seg button {
  flex: 1;
  border: 0;
  border-right: 1px solid #e5e5e5;
  background: transparent;
  padding: clamp(0.35em, 1vh, 0.6em) 0.3em;
  font-family: inherit;
  font-weight: 600;
  font-size: clamp(0.78rem, 1.6vh, 1rem);
  color: #333;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}
.seg button:last-child { border-right: 0; }
.seg button:hover { background: #f0f4f8; }
.seg button[aria-pressed="true"] { background: #007AFF; color: #fff; }
.seg button:focus-visible { outline: 2px solid #007AFF; outline-offset: -2px; }

.swap-button { width: 100%; gap: 10px; margin-top: 4px; font-weight: 600; }
.swap-button:hover { background: #f0f4f8; }
.swap-arrows { font-size: 1.2em; line-height: 1; }

.keyboard-button, .share-button {
  width: 100%;
  padding: clamp(0.35em, 1vh, 0.65em) clamp(0.4em, 1vw, 0.8em);
  font-weight: 600;
  text-align: center;
}
.keyboard-button:hover, .share-button:hover { background-color: #f0f4f8; box-shadow: 0 3px 6px rgba(0,0,0,0.15); }
.keyboard-button:active, .share-button:active { transform: translateY(1px); }

.share-section { margin-top: 2px; }
.share-output-container {
  display: flex;
  flex-direction: row;
  gap: 6px;
  margin-top: 8px;
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
  padding: 6px 8px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
  animation: fadeIn 0.2s ease-in-out;
}
.share-url-input {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 0.82rem;
  background: #f8f9fa;
  color: #333;
  font-family: inherit;
  outline: none;
  text-overflow: ellipsis;
}
.share-url-input:focus { border-color: #007AFF; background: #fff; }
.share-copy-btn {
  padding: 6px 12px;
  background-color: #007AFF;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  font-family: inherit;
  transition: background-color 0.2s, transform 0.1s;
}
.share-copy-btn:hover { background-color: #0056b3; }
.share-copy-btn:active { transform: scale(0.96); }
.share-copy-btn.copied { background-color: #34C759; }

/* ---- the keyboard picture ---- */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  inset: 0;
  overflow: auto;
  background-color: rgba(0,0,0,0.5);
  animation: fadeIn 0.3s;
}
.modal.open { display: block; }
.modal-content {
  background-color: #fefefe;
  margin: 8vh auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
  max-width: 650px;
  border-radius: 10px;
  position: relative;
  box-sizing: border-box;
  animation: slideIn 0.3s;
}
.close-button {
  position: absolute;
  top: 6px;
  right: 12px;
  border: 0;
  background: transparent;
  color: #aaa;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  line-height: 1;
  font-family: inherit;
}
.close-button:hover, .close-button:focus { color: black; }
.modal-heading {
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  color: #333;
  margin: 0 28px 10px 0;
}
#simulated-keyboard {
  padding: 15px;
  background: #d1d5db;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  border: 1px solid #bbb;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.5);
}
.keyboard-row { display: flex; justify-content: center; gap: 5px; }
.key {
  background: linear-gradient(to bottom, #fcfcfc, #e8e8e8);
  border: 1px solid #b4b4b4;
  border-radius: 4px;
  padding: 10px;
  font-size: 1.1em;
  font-family: Arial, sans-serif;
  flex: 1 1 0;
  min-width: 0;
  text-align: center;
  box-shadow: 0 2px 0px rgba(0,0,0,0.1);
  text-transform: uppercase;
  font-weight: bold;
  color: #333;
  cursor: default;
  user-select: none;
  transition: all 0.05s ease;
}
.key-spacer { background: transparent; border-color: transparent; box-shadow: none; pointer-events: none; }
.key.pressed { background: linear-gradient(to top, #fcfcfc, #e8e8e8); box-shadow: inset 0 1px 2px rgba(0,0,0,0.15); transform: translateY(1px); }
.key-sharp { background: #990000; color: white; }
.key-flat { background: #000099; color: white; }
/* both towers: a seam between the keyboard's two halves */
#simulated-keyboard.split .keyboard-row .key:nth-child(6) { margin-left: 14px; }
#simulated-keyboard.split { position: relative; }
#simulated-keyboard.split::after {
  content: '';
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 50%;
  width: 2px;
  margin-left: -1px;
  background: rgba(0,0,0,0.18);
  border-radius: 1px;
}
.key-legend {
  margin-top: 12px;
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 0.86rem;
  color: #444;
  line-height: 1.5;
}
.key-legend b { color: #111; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideIn { from { transform: translateY(-14px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

@media (max-width: 680px) {
  .modal-content { width: 95%; margin: 4vh auto; padding: 12px; }
  #simulated-keyboard { gap: 3px; padding: 10px; }
  .keyboard-row { gap: 3px; }
  .key { padding: 6px 2px; font-size: 0.9em; border-radius: 3px; }
  #simulated-keyboard.split .keyboard-row .key:nth-child(6) { margin-left: 8px; }
}
@media (max-height: 500px) {
  .modal-content { margin: 2vh auto; padding: 10px; }
  #simulated-keyboard { padding: 6px; gap: 2px; }
  .key { padding: 4px 2px; font-size: 0.75rem; }
  .menu-panel { gap: 8px; padding: 10px; }
}
@media (max-width: 360px) {
  .menu-panel { width: calc(100vw - 16px); }
}