/* 모르스 연습기 스타일. 색은 :root 토큰, 다크 모드는 prefers-color-scheme 과 data-theme 로 바꾼다. */
:root {
  --mr-bg: #f7f9fc; --mr-card: #ffffff; --mr-ink: #14233a; --mr-sub: #4b5d75;
  --mr-line: #d5deea; --mr-accent: #1f5fa8; --mr-accent-ink: #ffffff; --mr-good: #1c7c4a; --mr-bad: #b3261e;
  --mr-code-bg: #eef4fb; --mr-key: #e4edf8; --mr-key-down: #1f5fa8;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --mr-bg: #0f1a2a; --mr-card: #172538; --mr-ink: #e6eef9; --mr-sub: #a7b8cf;
    --mr-line: #2c3e57; --mr-accent: #6aa8f0; --mr-accent-ink: #0b1d33; --mr-good: #5fd39a; --mr-bad: #ff8a80;
    --mr-code-bg: #1d3049; --mr-key: #22344f; --mr-key-down: #6aa8f0;
  }
}
:root[data-theme="dark"] {
  --mr-bg: #0f1a2a; --mr-card: #172538; --mr-ink: #e6eef9; --mr-sub: #a7b8cf;
  --mr-line: #2c3e57; --mr-accent: #6aa8f0; --mr-accent-ink: #0b1d33; --mr-good: #5fd39a; --mr-bad: #ff8a80;
  --mr-code-bg: #1d3049; --mr-key: #22344f; --mr-key-down: #6aa8f0;
}

.mr-page { background: var(--mr-bg); color: var(--mr-ink); padding: 8px 16px 40px; }
.mr-wrap { max-width: 1180px; margin: 0 auto; }
.mr-title { font-size: 1.6rem; margin: 4px 0 8px; }
.mr-lead { color: var(--mr-sub); margin: 0 0 14px; line-height: 1.6; }
.mr-lead a { color: var(--mr-accent); }
.mr-card { background: var(--mr-card); border: 1px solid var(--mr-line); border-radius: 10px; padding: 14px 16px; margin-bottom: 14px; }
.mr-settings { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px 18px; }
.mr-field label, .mr-field .mr-label { display: block; font-weight: 600; margin-bottom: 4px; }
.mr-field output { color: var(--mr-sub); margin-left: 6px; font-variant-numeric: tabular-nums; }
.mr-field input[type="range"] { width: 100%; }
.mr-hint { color: var(--mr-sub); font-size: 0.9rem; margin: 6px 0 0; }
.mr-radio { margin-right: 14px; }

.mr-tabs { display: flex; gap: 6px; margin: 16px 0 10px; flex-wrap: wrap; }
.mr-tab { border: 1px solid var(--mr-line); background: var(--mr-card); color: var(--mr-ink); border-radius: 999px; padding: 8px 16px; cursor: pointer; font-size: 0.98rem; }
.mr-tab.is-on { background: var(--mr-accent); color: var(--mr-accent-ink); border-color: var(--mr-accent); }

.mr-textarea, .mr-input, .mr-select { width: 100%; box-sizing: border-box; border: 1px solid var(--mr-line); border-radius: 8px; padding: 9px 10px; background: var(--mr-card); color: var(--mr-ink); font-size: 1rem; }
.mr-textarea { min-height: 90px; font-family: inherit; }
.mr-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 10px 0; }
.mr-btn { border: 0; border-radius: 8px; padding: 9px 16px; background: var(--mr-accent); color: var(--mr-accent-ink); font-size: 0.98rem; cursor: pointer; }
.mr-btn:disabled { opacity: 0.45; cursor: default; }
.mr-btn-sub { background: var(--mr-code-bg); color: var(--mr-ink); border: 1px solid var(--mr-line); padding: 6px 12px; }
.mr-status { color: var(--mr-sub); min-height: 1.4em; }
.mr-codes { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; font-family: ui-monospace, Menlo, Consolas, monospace; }
.mr-code { background: var(--mr-code-bg); border-radius: 6px; padding: 3px 7px; letter-spacing: 1px; }
.mr-sep { color: var(--mr-sub); padding: 3px 4px; }
.mr-warn { color: var(--mr-bad); margin: 6px 0 0; }
.mr-audio-warn { color: var(--mr-bad); font-weight: 600; }

.mr-item { border-top: 1px dashed var(--mr-line); padding: 10px 0; }
.mr-item-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; font-weight: 600; }
.mr-item-res { margin-top: 6px; }
.mr-good { color: var(--mr-good); font-weight: 600; }
.mr-bad-text { color: var(--mr-bad); font-weight: 600; }
.mr-wrongs { color: var(--mr-bad); font-size: 0.92rem; margin-top: 2px; }
.mr-history { color: var(--mr-sub); font-size: 0.92rem; line-height: 1.7; }

.mr-key {
  display: block; width: 100%; max-width: 460px; margin: 14px auto; padding: 56px 12px; border-radius: 16px;
  border: 2px solid var(--mr-accent); background: var(--mr-key); color: var(--mr-ink); font-size: 1.3rem;
  user-select: none; -webkit-user-select: none; touch-action: none; cursor: pointer;
}
.mr-key.is-down { background: var(--mr-key-down); color: var(--mr-accent-ink); }
.mr-key-out { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 1.1rem; min-height: 1.6em; word-break: break-all; }
.mr-key-text { font-size: 1.6rem; font-weight: 700; min-height: 2em; }
.mr-key-label { color: var(--mr-sub); font-size: 0.9rem; }

/* 안내 페이지 */
.mr-guide h2 { font-size: 1.25rem; margin: 22px 0 8px; border-left: 4px solid var(--mr-accent); padding-left: 10px; }
.mr-guide h3 { font-size: 1.05rem; margin: 14px 0 6px; }
.mr-guide p, .mr-guide li { line-height: 1.7; }
.mr-table-wrap { overflow-x: auto; }
.mr-table { border-collapse: collapse; width: 100%; margin: 6px 0 12px; font-size: 0.95rem; }
.mr-table th, .mr-table td { border: 1px solid var(--mr-line); padding: 6px 8px; text-align: left; vertical-align: top; }
.mr-table th { background: var(--mr-code-bg); }
.mr-table .mr-cw { font-family: ui-monospace, Menlo, Consolas, monospace; letter-spacing: 1px; white-space: nowrap; }
.mr-faq dt { font-weight: 700; margin-top: 12px; }
.mr-faq dd { margin: 4px 0 0 0; line-height: 1.7; }
.mr-source { color: var(--mr-sub); font-size: 0.9rem; }

/* 반응형: 768 · 480 · 380 */
@media (max-width: 768px) {
  .mr-title { font-size: 1.35rem; }
  .mr-card { padding: 12px; }
  .mr-key { padding: 44px 8px; }
}
@media (max-width: 480px) {
  .mr-page { padding: 6px 12px 32px; }
  .mr-tab { padding: 7px 12px; font-size: 0.92rem; }
  .mr-settings { grid-template-columns: 1fr; }
  .mr-btn { padding: 9px 12px; }
  .mr-table { font-size: 0.86rem; }
}
@media (max-width: 380px) {
  .mr-page { padding: 4px 10px 28px; }
  .mr-title { font-size: 1.2rem; }
  .mr-key { font-size: 1.1rem; }
}

/* 부호 안내 표 */
.mr-chart-title { font-size: 1.3rem; margin: 2px 0 8px; }
.mr-sub-title { font-size: 1rem; margin: 16px 0 6px; color: var(--mr-sub); }
.mr-search-row { margin: 8px 0 4px; }
.mr-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.mr-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(92px, 100%), 1fr)); gap: 8px; }
.mr-qlist { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(190px, 100%), 1fr)); gap: 8px; }
.mr-cell {
  min-width: 0; display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 8px 6px;
  border: 1px solid var(--mr-line); border-radius: 10px; background: var(--mr-card); color: var(--mr-ink);
  cursor: pointer; font: inherit; text-align: center; overflow: hidden;
}
.mr-cell:hover, .mr-cell:focus-visible { border-color: var(--mr-accent); outline: none; }
.mr-cell.mr-hit { background: var(--mr-key); border-color: var(--mr-accent); box-shadow: 0 0 0 2px var(--mr-accent); }
.mr-cell-label { font-size: 1.25rem; font-weight: 700; }
.mr-cell-bars { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 8px; min-height: 8px; }
.mr-tok { display: inline-flex; gap: 3px; align-items: center; }
.mr-dot, .mr-dah { display: inline-block; height: 6px; border-radius: 2px; background: var(--mr-accent); }
.mr-dot { width: 6px; }
.mr-dah { width: 18px; }
.mr-cell-glyph { font-family: ui-monospace, Menlo, Consolas, monospace; color: var(--mr-sub); font-size: 0.92rem; word-break: break-all; }
.mr-cell-wide { flex-direction: row; flex-wrap: wrap; justify-content: flex-start; text-align: left; }
.mr-cell-wide .mr-cell-label { min-width: 56px; }
.mr-cell-mean { flex-basis: 100%; color: var(--mr-sub); font-size: 0.9rem; text-align: left; word-break: keep-all; }
@media (max-width: 768px) {
  .mr-pair { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .mr-grid { grid-template-columns: repeat(auto-fill, minmax(min(84px, 100%), 1fr)); gap: 6px; }
  .mr-cell-label { font-size: 1.1rem; }
  .mr-qlist { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .mr-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mr-cell { padding: 6px 4px; }
}

/* 옆음 스위치 */
.mr-switch { display: inline-flex; align-items: center; gap: 10px; border: 0; background: none; color: var(--mr-ink); font: inherit; cursor: pointer; padding: 6px 4px; }
.mr-switch:focus-visible { outline: 2px solid var(--mr-accent); outline-offset: 2px; border-radius: 6px; }
.mr-switch-track { position: relative; display: inline-block; width: 44px; height: 24px; border-radius: 999px; background: var(--mr-line); transition: background 0.15s; }
.mr-switch-knob { position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: var(--mr-card); transition: transform 0.15s; }
.mr-switch[aria-checked="true"] .mr-switch-track { background: var(--mr-accent); }
.mr-switch[aria-checked="true"] .mr-switch-knob { transform: translateX(20px); }
.mr-switch-text { font-weight: 600; }

/* 입력 키 지정 */
.mr-keyset { border: 1px solid var(--mr-line); border-radius: 10px; padding: 10px 12px; margin: 10px 0; }
.mr-keyset legend { padding: 0 6px; }
.mr-usb-note { border-top: 1px dashed var(--mr-line); margin-top: 12px; padding-top: 10px; }