/* MORSE PRACTICE — 화이트골드 톤 (spec_v2 6장 절대 변경 금지)
   배경 #fafaf8 / 카드 #ffffff / 골드 #c9b896·#8a7a5f / 텍스트 #0a0a0a·#2a2a2a / 보더 #e8dcc8 */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
               'Apple SD Gothic Neo', 'Malgun Gothic', Arial, sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', Monaco, Menlo, Consolas, 'Courier New', monospace;

  --bg:           #fafaf8;
  --card:         #ffffff;
  --gold:         #c9b896;
  --gold-dark:    #8a7a5f;
  --gold-bg:      #faf3e2;
  --gold-soft:    #d9c89f;
  --text:         #0a0a0a;
  --text-2:       #2a2a2a;
  --muted:        #8a7a5f;
  --border:       #e8dcc8;
  --border-light: #f0e6d2;

  --shadow:    0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-2);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--text-2); text-decoration: none; }
a:hover { color: var(--gold-dark); }

#app { min-height: 100vh; display: flex; flex-direction: column; }
.stage { flex: 1; width: 100%; max-width: 960px; margin: 0 auto; padding: 24px 20px 48px; }

/* ===== 헤더 ===== */
.site-head {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 50;
}
.site-head-inner {
  max-width: 960px; margin: 0 auto;
  display: flex; align-items: center; gap: 20px;
  padding: 10px 20px;
}
.brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 500; color: var(--text);
  font-size: 14px; letter-spacing: 2px;
}
.brand-mark {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--gold);
  display: inline-block;
}
.brand-name { color: var(--text); }
.mode-tabs {
  display: flex; gap: 4px; flex: 1; flex-wrap: wrap;
  justify-content: center;
}
.mode-tab {
  background: transparent; border: 1px solid transparent;
  color: var(--text-2); font-family: inherit;
  padding: 6px 14px; font-size: 13px;
  border-radius: var(--r-sm); cursor: pointer;
  transition: all 100ms;
}
.mode-tab:hover { background: var(--gold-bg); }
.mode-tab.active {
  background: var(--gold); color: var(--card); border-color: var(--gold-dark);
}
.head-actions { display: flex; gap: 6px; }
.site-head-min {
  padding: 6px 12px;
  display: flex; align-items: center; gap: 8px;
}
.site-head-min .mode-tabs { flex: 1; justify-content: flex-start; }

/* ===== 버튼 ===== */
.btn {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 7px 12px; font-size: 12px; color: var(--text-2);
  font-family: inherit; cursor: pointer;
  transition: all 80ms;
}
.btn:hover { border-color: var(--gold); background: var(--bg); }
.btn.small { padding: 5px 10px; font-size: 11px; }
.btn.active {
  background: var(--gold); border-color: var(--gold-dark); color: var(--card);
}
.btn.btn-primary {
  background: var(--gold-dark); border-color: var(--gold-dark); color: var(--card);
}
.btn.btn-primary:hover { background: var(--gold); border-color: var(--gold); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn.btn-toggle { border-style: dashed; }
.btn.btn-toggle.active { border-style: solid; }

.seg { display: inline-flex; gap: 0; }
.seg .btn { border-radius: 0; border-right-width: 0; }
.seg .btn:first-child { border-radius: var(--r-sm) 0 0 var(--r-sm); }
.seg .btn:last-child  { border-radius: 0 var(--r-sm) var(--r-sm) 0; border-right-width: 1px; }

.kbd {
  display: inline-block; background: var(--card); border: 1px solid var(--gold);
  border-radius: 4px; padding: 1px 6px; margin: 0 2px;
  font-weight: 500; color: var(--text); font-size: 11px;
  font-family: var(--font-mono);
}

/* ===== 카드/PCB (자유 모드) ===== */
.pcb {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 22px;
  font-family: var(--font-sans);
  color: var(--text-2);
}
.pcb-head {
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 12px; margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.pcb-head-min { padding-bottom: 10px; margin-bottom: 12px; }
.pcb-right { display: flex; align-items: center; gap: 12px; }
.pcb-title  { font-size: 15px; font-weight: 500; letter-spacing: 3px; color: var(--text); }
.pcb-sub    { font-size: 11px; color: var(--muted); letter-spacing: 2px; margin-top: 2px; }
.view-seg { display: flex; }
.pcb-leds   { display: flex; gap: 10px; align-items: center; }
.led {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--border-light);
  border: 1px solid var(--gold);
  transition: background 40ms, box-shadow 40ms;
}
.led.on { background: var(--gold); box-shadow: 0 0 0 3px #f5ecd9; }

/* 차트 (나열) */
.chart {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}
.cell {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 8px 4px; text-align: center;
  transition: background 60ms, border-color 60ms;
}
.cell .ch { font-size: 15px; font-weight: 500; color: var(--text); font-family: var(--font-mono); }
.cell .mc { font-size: 11px; color: var(--muted); letter-spacing: 1.5px; margin-top: 2px; font-family: var(--font-mono); }
.cell.partial { background: var(--gold-bg); border-color: var(--gold-soft); }
.cell.match   { background: var(--gold); border-color: var(--gold-dark); }
.cell.match .ch, .cell.match .mc { color: var(--card); }

/* 차트 (트리) */
.tree-scroll { overflow-x: auto; padding: 8px 4px; }
.tree-svg {
  width: 100%; min-width: 800px;
  height: auto;
}
.tree-edge {
  stroke: var(--border);
  stroke-width: 1.5;
  fill: none;
}
.tree-edge.on-path {
  stroke: var(--gold-dark);
  stroke-width: 2.5;
}
.tree-node circle {
  fill: var(--card);
  stroke: var(--border);
  stroke-width: 1.5;
}
.tree-node text {
  font-size: 12px;
  fill: var(--text);
  font-family: var(--font-mono);
}
.tree-node.tree-root circle { fill: var(--gold-bg); stroke: var(--gold-soft); }
.tree-node.on-path circle {
  stroke: var(--gold-dark);
}
.tree-node.on-node circle {
  fill: var(--gold);
  stroke: var(--gold-dark);
}
.tree-node.on-node text { fill: var(--card); }

/* DISPLAY (SIGNAL/DECODED) */
.display {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 14px 16px; margin: 14px 0;
}
.display.compact { padding: 10px 14px; margin: 10px 0; }
.disp-label   { font-size: 10px; color: var(--muted); letter-spacing: 2px; margin-bottom: 4px; font-family: var(--font-mono); }
.disp-label-2 { margin-top: 8px; }
.disp-current { font-size: 22px; color: var(--gold-dark); min-height: 28px; letter-spacing: 4px; font-family: var(--font-mono); }
.disp-text    { font-size: 16px; color: var(--text); min-height: 22px; margin-top: 6px; word-break: break-all; font-family: var(--font-mono); }

.controls { display: flex; gap: 8px; flex-wrap: wrap; padding-top: 12px; border-top: 1px solid var(--border); }
.hint     { font-size: 11px; color: var(--muted); margin-top: 10px; text-align: center; font-family: var(--font-mono); letter-spacing: 1px; }
.hint.small { font-size: 10px; }

/* ===== 연습 모드 공통 ===== */
.practice { display: flex; flex-direction: column; gap: 14px; }
.practice-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--muted);
}
.practice-progress b, .stat-item b { color: var(--text); }
.practice-stats { display: flex; gap: 14px; }

.practice-bar {
  height: 4px; background: var(--border-light); border-radius: 2px; overflow: hidden;
}
.practice-bar-fill {
  height: 100%; background: var(--gold);
  width: 0; transition: width 200ms;
}

.practice-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 22px;
  display: flex; flex-direction: column; gap: 14px;
  transition: background 80ms, border-color 80ms;
}
.practice-card.practice-card-wide { padding: 24px; }
.practice-card.flash-bad {
  background: #fef0f0;
  border-color: #e8b8b8;
}
.practice-lang {
  font-size: 11px; letter-spacing: 2px;
  color: var(--muted); font-family: var(--font-mono);
}
.practice-morse {
  font-size: 28px; letter-spacing: 4px; color: var(--gold-dark);
  font-family: var(--font-mono);
  text-align: center; padding: 16px 0;
  word-break: break-all;
}
.practice-input-row {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
}
.practice-input-row input[type="text"] {
  flex: 1; min-width: 160px;
  font-family: var(--font-mono); font-size: 16px;
  padding: 8px 12px;
  border: 1px solid var(--border); border-radius: var(--r-sm);
  background: var(--card); color: var(--text);
}
.practice-input-row input:focus {
  outline: none; border-color: var(--gold);
}
.practice-feedback {
  font-size: 14px; min-height: 22px;
  text-align: center;
}
.practice-feedback.ok  { color: var(--gold-dark); }
.practice-feedback.bad { color: #b94a4a; }

.practice-helper { display: flex; flex-direction: column; gap: 8px; }
.helper-panel { padding: 12px; background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); }

.practice-result {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 24px; text-align: center;
}
.practice-result h3 { margin: 0 0 12px; color: var(--text); }
.practice-result p { margin: 6px 0; }

/* 거꾸로 모드 — 타겟 단어 */
.send-target {
  font-size: 36px; letter-spacing: 8px; text-align: center;
  font-family: var(--font-mono); color: var(--text);
  padding: 12px 0;
}
.send-target span { display: inline-block; }
.send-progress {
  display: flex; gap: 6px; flex-wrap: wrap; justify-content: center;
  padding: 8px 0;
}
.jamo {
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 4px 8px;
  border: 1px solid var(--border-light);
  border-radius: var(--r-sm);
  color: var(--muted);
  background: var(--card);
}
.jamo.gap { border: none; background: transparent; color: var(--border); }
.jamo.ok  { background: var(--gold-bg); border-color: var(--gold-soft); color: var(--gold-dark); }
.jamo.on  { background: var(--gold); border-color: var(--gold-dark); color: var(--card); }

/* 단어 완성 모드 */
.complete-word {
  font-size: 40px; letter-spacing: 6px; text-align: center;
  font-family: var(--font-mono); color: var(--text); padding: 12px 0;
}
.complete-word .syl {
  display: inline-block;
  padding: 0 4px;
  min-width: 32px;
}
.complete-word .syl.miss { color: var(--border); }
.complete-word .syl.gap  { color: var(--border); }
.complete-jamos {
  display: flex; gap: 6px; flex-wrap: wrap; justify-content: center;
}
.jamo-cell {
  font-family: var(--font-mono);
  border: 1px solid var(--border-light);
  border-radius: var(--r-sm);
  padding: 6px 10px;
  text-align: center;
  background: var(--card);
}
.jamo-cell.gap { background: transparent; border: none; }
.jamo-cell.on  { border-color: var(--gold); background: var(--gold-bg); }
.jamo-cell.ok  { border-color: var(--gold-dark); background: var(--gold-bg); color: var(--gold-dark); }
.jamo-cell.bad { border-color: #b94a4a; background: #fef0f0; color: #b94a4a; }
.jamo-cell .jc { font-size: 16px; color: var(--text); }
.jamo-cell.ok .jc, .jamo-cell.on .jc { color: var(--gold-dark); }
.jamo-cell.bad .jc { color: #b94a4a; }
.jamo-cell .jm { font-size: 10px; color: var(--muted); margin-top: 2px; letter-spacing: 1px; }

/* ===== 통계 패널 ===== */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 20px 22px;
}
.card h2 { margin: 0 0 16px; color: var(--text); font-size: 18px; }
.card h3 { margin: 20px 0 8px; color: var(--text); font-size: 14px; }
.stats-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
  margin-bottom: 16px;
}
.stat-block {
  background: var(--bg); border: 1px solid var(--border-light);
  border-radius: var(--r-md); padding: 12px;
}
.stat-l { font-size: 11px; color: var(--muted); letter-spacing: 1px; }
.stat-v { font-size: 20px; color: var(--text); font-weight: 500; margin-top: 4px; }

.stats-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.stats-table th, .stats-table td {
  text-align: left; padding: 8px 12px;
  border-bottom: 1px solid var(--border-light);
}
.stats-table th { font-weight: 500; color: var(--muted); font-size: 11px; letter-spacing: 1px; }
.stats-table tr:last-child td { border-bottom: none; }
.muted { color: var(--muted); }

/* ===== 설정 모달 ===== */
.modal-bg {
  position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 20px;
}
.modal {
  background: var(--card); border-radius: var(--r-lg);
  max-width: 560px; width: 100%; max-height: 90vh; overflow: auto;
  display: flex; flex-direction: column;
}
.modal-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-head h3 { margin: 0; font-size: 16px; color: var(--text); }
.modal-body { padding: 16px 20px; }
.modal-body section { margin-bottom: 18px; }
.modal-body h4 { margin: 0 0 8px; font-size: 13px; color: var(--muted); letter-spacing: 1px; }

.lang-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px;
  font-size: 12px; cursor: pointer;
  background: var(--card);
}
.chip.on {
  background: var(--gold); border-color: var(--gold-dark); color: var(--card);
}
.chip input[type="checkbox"] { display: none; }

.toggle {
  display: flex; gap: 8px; align-items: center;
  cursor: pointer;
}
.userword-row { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.userword-row select, .userword-row input {
  padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--r-sm);
  font-family: inherit; font-size: 13px; background: var(--card);
}
.userword-row input { flex: 1; min-width: 120px; }
.userword-list { display: flex; gap: 4px; flex-wrap: wrap; }
.userword {
  display: inline-flex; gap: 6px; align-items: center;
  background: var(--bg); border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 999px; font-size: 12px;
  cursor: pointer;
}
.userword:hover { background: var(--gold-bg); border-color: var(--gold); }
.uw-x { color: var(--muted); }

/* ===== 푸터 (BAAL 공통, 화이트골드 톤 변환) ===== */
.site-footer {
  margin-top: 48px;
  width: 100%; max-width: 960px; margin-left: auto; margin-right: auto;
  border-top: 1px solid var(--border);
  background: var(--card);
}
.footer-row {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
}
.footer-row-mini { padding: 10px 20px; text-align: center; }
.footer-h {
  font-size: 13px; font-weight: 500; color: var(--text);
  text-align: center; margin: 0 0 10px;
}
.footer-chips, .footer-links {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center;
}
.footer-chip {
  padding: 4px 12px; font-size: 12px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-2);
  transition: all 80ms;
}
.footer-chip:hover { border-color: var(--gold); color: var(--gold-dark); }
.footer-chip-all {
  background: var(--gold-bg); border-color: var(--gold-soft); color: var(--gold-dark);
}
.footer-chip-all:hover { background: var(--gold); color: var(--card); }
.footer-link {
  font-size: 13px; color: var(--muted);
  transition: color 80ms;
}
.footer-link:hover { color: var(--gold-dark); }
.footer-copy {
  padding: 16px 20px;
  text-align: center;
  font-size: 11px; color: var(--muted);
}
.footer-copy a { color: var(--muted); }
.footer-copy a:hover { color: var(--gold-dark); }

/* ===== 반응형 ===== */
@media (max-width: 640px) {
  .stage { padding: 16px 12px 32px; }
  .site-head-inner { gap: 10px; padding: 8px 12px; flex-wrap: wrap; }
  .brand-name { font-size: 12px; letter-spacing: 1px; }
  .mode-tabs { gap: 2px; flex-wrap: wrap; }
  .mode-tab { padding: 5px 10px; font-size: 12px; }
  .chart { grid-template-columns: repeat(4, 1fr); }
  .pcb { padding: 14px; }
  .pcb-head { flex-wrap: wrap; gap: 8px; }
  .pcb-title { font-size: 13px; letter-spacing: 2px; }
  .disp-current { font-size: 18px; letter-spacing: 3px; }
  .send-target { font-size: 28px; letter-spacing: 4px; }
  .complete-word { font-size: 30px; letter-spacing: 3px; }
  .practice-morse { font-size: 22px; letter-spacing: 3px; }
  .tree-svg { min-width: 1000px; }
  .stats-grid { grid-template-columns: 1fr; }
}

@media (max-width: 400px) {
  .chart { grid-template-columns: repeat(3, 1fr); }
  .practice-card { padding: 14px; }
}

/* ===== 사이드 패널 (좁은 세로) ===== */
body.variant-sidebar {
  font-size: 13px;
}
body.variant-sidebar .stage { padding: 12px 10px; }
body.variant-sidebar .chart { grid-template-columns: repeat(3, 1fr); gap: 4px; }
body.variant-sidebar .pcb   { padding: 10px; }
body.variant-sidebar .practice-card { padding: 14px; }
body.variant-sidebar .send-target { font-size: 24px; letter-spacing: 3px; }
body.variant-sidebar .complete-word { font-size: 24px; letter-spacing: 2px; }
body.variant-sidebar .practice-morse { font-size: 18px; letter-spacing: 2px; }
body.variant-sidebar .mode-tabs { gap: 2px; }
body.variant-sidebar .mode-tab { padding: 4px 8px; font-size: 11px; }

/* ===== 임베드 ===== */
body.variant-embed { background: transparent; }
body.variant-embed .stage { padding: 8px; max-width: none; }
body.variant-embed .site-head { box-shadow: none; }