:root {
  color-scheme: light;
  
  /* 정제된 실용적 컬러 팔레트 */
  --bg: #f8fafc;
  --panel: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --line-focus: #94a3b8;
  
  /* 브랜드 악센트 (차분하고 정돈된 딥 teal) */
  --accent: #0f766e;
  --accent-hover: #115e59;
  --accent-ink: #ffffff;
  --soft-bg: #f1f5f9;
  
  /* 상태 표시용 의미론적 컬러 */
  --good-bg: #f0fdf4;
  --good-border: #bbf7d0;
  --good-text: #166534;
  
  --warn-bg: #fffbeb;
  --warn-border: #fef08a;
  --warn-text: #854d0e;
  
  --bad-bg: #fef2f2;
  --bad-border: #fecaca;
  --bad-text: #991b1b;
  
  --status-info-bg: #ecfeff;
  --status-info-border: #cffafe;
  --status-info-text: #155e75;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

/* 포커스 링 접근성 강화 */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 메인 레이아웃 구성 */
.app-shell {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px;
  min-height: 100vh;
}

.tool-panel,
.results-panel {
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

/* 왼쪽 컨트롤 패널 (스티키 스크롤 보장) */
.tool-panel {
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px;
  position: sticky;
  top: 24px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
}

/* 오른쪽 결과 패널 */
.results-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 24px;
  min-width: 0;
}

/* 타이틀 및 헤더 영역 */
.brand-row h1 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin: 0 0 6px 0;
}

.subhead {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  margin: 0;
}

/* 폼 요소 공통 */
.field-label,
.control-grid span,
.mode-field legend {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 6px;
  display: block;
}

textarea,
input[type="number"] {
  width: 100%;
  color: var(--ink);
  background-color: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea:focus,
input[type="number"]:focus {
  outline: none;
  border-color: var(--line-focus);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.08);
}

textarea {
  min-height: 180px;
  padding: 12px;
  resize: vertical;
  line-height: 1.5;
}

.form-note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  margin: -12px 0 0;
}

.control-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, 1fr);
}

.control-grid label {
  display: flex;
  flex-direction: column;
}

input[type="number"] {
  height: 42px;
  padding: 0 12px;
}

/* 라디오 버튼 필드셋 그룹 */
.mode-field {
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0;
  padding: 16px;
  background-color: var(--soft-bg);
}

.mode-field legend {
  padding: 0 4px;
  margin-bottom: 8px;
}

.mode-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mode-field label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.mode-field input[type="radio"] {
  margin: 0;
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

/* 하단 버튼 액션 그리드 정렬 수정 (글자 잘림 완전 방지) */
.action-row {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 8px;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 12px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

#generateBtn {
  background-color: var(--accent);
  color: var(--accent-ink);
}

#generateBtn:hover {
  background-color: var(--accent-hover);
}

.secondary {
  background-color: #ffffff;
  border-color: var(--line);
  color: var(--muted);
}

.secondary:hover {
  background-color: var(--soft-bg);
  color: var(--ink);
  border-color: var(--line-focus);
}

#sampleBtn {
  background-color: var(--soft-bg);
  color: var(--accent);
  font-size: 12px;
  height: 28px;
  padding: 0 10px;
  border-radius: 6px;
}

#sampleBtn:hover {
  background-color: var(--line);
}

/* 인포메이션 상태 박스 */
.status-box {
  background-color: var(--status-info-bg);
  border: 1px solid var(--status-info-border);
  border-radius: 8px;
  color: var(--status-info-text);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
  padding: 12px;
}

/* 결과창 헤더 레이아웃 */
.results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.results-head h2 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin: 0 0 4px 0;
}

.quality-text {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

/* 품질 인디케이터 배지 디자인 고도화 */
.quality-badge {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 9999px;
  border: 1px solid var(--line);
}

.quality-badge.good { background-color: var(--good-bg); border-color: var(--good-border); color: var(--good-text); }
.quality-badge.warn { background-color: var(--warn-bg); border-color: var(--warn-border); color: var(--warn-text); }
.quality-badge.bad { background-color: var(--bad-bg); border-color: var(--bad-border); color: var(--bad-text); }

/* 상단 핵심 메트릭스 그리드 */
.summary-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, 1fr);
}

.metric {
  background-color: var(--soft-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}

.metric strong {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.2;
}

.metric span {
  color: var(--muted);
  display: block;
  font-size: 12px;
  font-weight: 600;
  margin-top: 4px;
}

/* 깔끔하게 정돈된 탭 스타일 */
.tabs {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--line);
  padding-top: 8px;
}

.tab {
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-bottom: 0;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  margin-bottom: -1px;
}

.tab:hover {
  background-color: var(--soft-bg);
  color: var(--ink);
}

.tab.is-active {
  background-color: var(--panel);
  border-color: var(--line) var(--line) transparent var(--line);
  color: var(--accent);
  box-shadow: 0 -2px 0 0 var(--accent) inset;
}

/* 라운드 경기 카드 디자인 */
.round-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
  overflow: hidden;
  background-color: #ffffff;
}

.round-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  background-color: var(--soft-bg);
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
}

.round-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.bye-line {
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

/* 실제 경기 진행용 고대비 테이블 스케일링 */
.games-table,
.stats-table {
  border-collapse: collapse;
  width: 100%;
}

.games-table th,
.stats-table th {
  background-color: #ffffff;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
}

.games-table td,
.stats-table td {
  padding: 14px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

.games-table tr:last-child td,
.stats-table tr:last-child td {
  border-bottom: 0;
}

/* 실전 시인성을 극대화한 팀명 및 대진 표시 */
.games-table td:nth-child(1) {
  font-weight: 600;
  color: var(--muted);
  width: 15%;
}

.games-table td:nth-child(2),
.games-table td:nth-child(3) {
  width: 42.5%;
}

.team {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  background-color: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 12px;
}

/* 대조 피드백 표시자 */
.flag-bad { color: var(--bad-text); font-weight: 700; background-color: var(--bad-bg); padding: 2px 6px; border-radius: 4px; }
.flag-ok { color: var(--good-text); font-weight: 700; background-color: var(--good-bg); padding: 2px 6px; border-radius: 4px; }

.empty-state {
  border: 2px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 36px;
  text-align: center;
  font-size: 14px;
  margin: 16px 0;
}

/* 960px 이하 해상도: 상하 2단 배치 분할 */
@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 16px;
    gap: 16px;
  }

  .tool-panel {
    position: static;
    max-height: none;
  }

  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 560px 이하 해상도: 초소형 화면 최적화 */
@media (max-width: 560px) {
  .app-shell {
    padding: 8px;
  }
  
  .tool-panel,
  .results-panel {
    padding: 16px;
    border-radius: 8px;
  }

  .action-row {
    grid-template-columns: 1fr;
  }

  .results-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .summary-grid {
    grid-template-columns: 1fr;
  }
  
  .games-table td {
    padding: 10px;
  }
  
  .team {
    font-size: 13px;
    padding: 6px 8px;
  }
}

/* 완벽한 페이퍼 출력을 위한 고해상도 인쇄 전용 CSS */
@media print {
  @page {
    size: A4 portrait;
    margin: 15mm;
  }

  body {
    background-color: #ffffff !important;
    color: #000000 !important;
    font-size: 12pt;
  }

  .tool-panel,
  .results-head,
  .tabs,
  .status-box,
  button,
  .quality-badge {
    display: none !important;
  }

  .app-shell {
    display: block !important;
    padding: 0 !important;
    max-width: 100% !important;
  }

  .results-panel {
    border: 0 !important;
    box-shadow: none !important;
    padding: 0 !important;
    display: block !important;
  }

  .summary-grid {
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 10px !important;
    margin-bottom: 30px !important;
    page-break-inside: avoid;
  }

  .metric {
    background-color: #ffffff !important;
    border: 1px solid #000000 !important;
    border-radius: 4px !important;
    padding: 8px !important;
  }
  
  .metric strong {
    font-size: 16pt !important;
  }

  .round-card {
    border: 1px solid #000000 !important;
    border-radius: 4px !important;
    margin-bottom: 25px !important;
    page-break-inside: avoid; /* 라운드 카드가 페이지 중간에서 잘리는 문제 방지 */
    background-color: #ffffff !important;
  }

  .round-head {
    background-color: #f1f5f9 !important;
    border-bottom: 1px solid #000000 !important;
    padding: 8px 12px !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .round-title {
    font-size: 13pt !important;
    font-weight: bold !important;
  }

  .games-table th {
    border-bottom: 1px solid #000000 !important;
    padding: 6px 10px !important;
  }

  .games-table td {
    padding: 10px 12px !important;
    border-bottom: 1px solid #e2e8f0 !important;
    font-size: 11pt !important;
  }

  .team {
    background-color: #ffffff !important;
    border: 0 !important;
    padding: 0 !important;
    font-size: 12pt !important;
  }
}