/* Shared lesson layout and controls for all locales and exercise types */

:root { --btn-size: 50px; }

/* Piano/staff stage */
#piano-stage { position: relative; display: block; max-width: 100%; padding: 0 14px; }
#piano-stage #pianoCanvas { max-height: min(300px, calc(100vh - 60px)); width: auto; max-width: 100%; }
#piano-stage.show-staff { align-items: center; }

/* iPad/iOS landscape: keep same visual scale as portrait */
@supports (-webkit-touch-callout: none) {
  @media (orientation: landscape) {
    #piano-stage #pianoCanvas {
      max-height: min(300px, calc(100vh - 60px)) !important;
      max-height: min(300px, calc(100dvh - 60px)) !important;
    }
  }
}

.piano-canvas-wrap { min-width: 0; overflow: hidden; }
#piano-stage canvas { display: block; max-width: 100%; height: auto; }

/* Staff container toggled via .show-staff on #piano-stage */
#staff-container { display: none; width: 100%; max-height: min(300px, calc(100vh - 60px)); overflow: hidden; padding-top: 0; }
#piano-stage.show-staff #staff-container { display: block; }
#piano-stage.show-staff #pianoCanvas { display: none; }
#staff-container svg { display: block; width: 100%; height: auto; }

/* Controls bar */
.piano-lesson-controls { position: relative; left: auto; top: auto; transform: none; display: flex; flex-direction: row; align-items: center; justify-content: center; gap: 8px; z-index: 2; opacity: 0.9; padding: 8px 14px; max-width: 900px; margin: clamp(8px, 3vh, 50px) auto 4px; }
.piano-lesson-controls .pbtn { width: var(--btn-size); height: var(--btn-size); border-radius: 4px; border: 1px solid rgba(0,0,0,0.08); background: rgb(119 119 119 / 6%); color: inherit; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; user-select: none; }
.piano-lesson-controls .pbtn svg { width: calc(var(--btn-size) * 0.72); height: calc(var(--btn-size) * 0.72); stroke: currentColor; }
.piano-lesson-controls .pbtn img { width: calc(var(--btn-size) * 0.72); height: calc(var(--btn-size) * 0.72); object-fit: contain; display: block; }
.piano-lesson-controls .pbtn.selected,
.piano-lesson-controls .pbtn[aria-pressed="true"] { background: #fff; box-shadow: 0 0 3px #00000030; color: inherit; border: 1px solid #afafaf75; }

/* Footer */
#lesson-progress { flex: 1; text-align: center; font-weight: 700; color: var(--lesson-ui-color); font-size: 1.3rem; }
/* Exercise result helpers: score and errors share this class so they can be styled independently */
.exercise-result {margin: 0 6px; font-weight: 600; vertical-align: middle; color: #0f1724; padding: 10px 15px; }
#lesson-best-score {     
    padding: 15px 10px;
    width: 100%;
    text-align: center;
    color: #0f1724;
    border-top: 2px solid #ebebeb;
}

/* Place score and errors on one line in the summary */
.exercise-results-wrap { display: inline-flex; align-items: center; gap: 8px;}
#lesson-footer .pbtn { width: calc(var(--btn-size) * 0.65); height: calc(var(--btn-size) * 0.65); border-radius: 50%; padding: 0; display: inline-flex; align-items: center; justify-content: center; background: #f8fafc; font-size: calc(var(--btn-size) * 0.5); line-height: 1; border: 2px solid var(--lesson-ui-color); color: var(--lesson-ui-color); }
#lesson-footer .pbtn img { width: calc(var(--btn-size) * 0.5); height: calc(var(--btn-size) * 0.5); object-fit: contain; }

/* Lesson config form */
#lesson-config { max-width: 720px; margin: 23px auto; padding: 0 30px; }
#lesson-config h2 { font-size: 1.3rem; margin: 0 0 23px; }
#lesson-config form { display: flex;gap: 27px;flex-direction: column;}
#lesson-config label { display: grid; gap: 6px; font-weight: 600; }
#lesson-config select, #lesson-config input[type="number"] { width: 100%; padding: 6px 8px; font-size: 1rem; border: 1px solid rgba(0,0,0,0.12); border-radius: 4px; background: rgba(255,255,255,0.02); color: #2d2d2d; font-family: inherit; }

.lesson-option-icons{display:flex;gap:15px;flex-wrap:wrap;}
.lesson-option{display:flex;flex-direction:column;align-items:center;gap:6px}
.lesson-option span{display:block;text-align:center;font-size:0.95rem}
.lesson-option .icon-toggle img{display:block;max-width:64px;height:auto}
.lesson-option button{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 10px;border-radius:8px;border:1px solid #00000038;background:#7777770f;color:#e3e7ef;opacity:.4;cursor: pointer;position:relative}
/* When an option is enabled, make the button clearly visible (white background). */
.lesson-option button[aria-pressed="true"],
.lesson-option button[data-enabled="true"] {
  background: #fff;
  color: var(--lesson-ui-color, #111);
  opacity: 1;
  border: 1px solid #afafaf75;
  box-shadow: 0 0 3px #00000030;
}
/* Padlock shown when a toggle is locked by difficulty */
.lesson-option button .padlock{position:absolute;top:6px;right:6px;width:16px;height:16px;background-image:url('/learn/icons/padlock.svg');background-size:16px 16px;background-repeat:no-repeat;pointer-events:none;opacity:0.6}
button.primary {
    background: linear-gradient(180deg, #1d4ed8, #1e40af);
    color: var(--btn-primary-text, #fff);
    border: none;
    font-weight: 700;
    box-shadow: 0 6px 20px rgba(30, 64, 175, 0.12);
    cursor: pointer;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 1em;
    font-family: inherit;
}

/* Question + answers */
.lesson-question { max-width: 900px; margin: 14px auto 6px; padding: 8px 12px; background: rgba(255,255,255,0.03); border-radius: 6px; text-align: center; }
.lesson-question .question-text { margin: 0; font-size: 1.65rem; color: currentColor; }
#lesson-score-summary{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 1.1em;
}

@media (max-width: 480px) { .lesson-question { margin: 10px 8px; padding: 6px 8px; } .lesson-question .question-text { font-size: 1.4rem; } }

#answers { max-width: 900px; margin: 30px auto; display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; padding: 6px; }
#answers .answer { min-width: 34px; padding: 8px 12px; border-radius: 6px; border: 1px solid rgba(0,0,0,0.12); background: rgba(255,255,255,0.02); cursor: pointer; font-weight: 700; font-size: 1rem; font-family: inherit; color: #2d2d2d; }

/* Touch targets */
@media (pointer: coarse) { .piano-lesson-controls .pbtn { min-width: 36px; min-height: 36px; } }
@media (pointer: coarse) and (max-width: 480px) { :root { --btn-size: 50px; } }

/* Center lesson hint dialog and style backdrop */
dialog#lesson-hint-dialog::backdrop{ background: rgba(0,0,0,0.45); }
dialog#lesson-hint-dialog{ max-width: 720px; width: calc(100% - 40px); padding: 18px; border-radius: 10px; border: none; box-shadow: 0 10px 30px rgba(0,0,0,0.35); }
dialog#lesson-hint-dialog[open]{
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 1200;
}

/* Position the close button in the top-right corner of the hint dialog */
dialog#lesson-hint-dialog{ position: relative; }
dialog#lesson-hint-dialog #lesson-hint-close{
    position: absolute;
    top: 7px;
    right: 7px;
    border: none;
    padding: 3px;
    border-radius: 6px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #efefef;
    color: #555;
}
dialog#lesson-hint-dialog #lesson-hint-close svg{ display:block; width:20px; height:20px; }

dialog#lesson-hint-dialog #lesson-hint-content{ margin-top: 15px;}

/* Quick-reference lists inside lesson hints */
.clef-ref { margin: 8px 0 0 0; padding-left: 1.1em; }
.clef-ref li { margin: 6px 0; font-size: 0.95em; color: #222;  list-style-type: circle; }
.clef-ref li::marker { color: var(--lesson-ui-color, #1e40af); font-weight: 700; }

/* Table in hint: make it readable on small screens */
dialog#lesson-hint-dialog table{ width:100%; border-collapse: collapse; margin-top:8px; }
dialog#lesson-hint-dialog th, dialog#lesson-hint-dialog td{ padding:8px 6px; text-align:left; }
dialog#lesson-hint-dialog tbody tr td{ border-bottom: 1px solid #eee; }