:root {
  --vn: #d81e2c;
  --vn-dark: #a5161f;
  --cn: #f2b400;
  --cn-dark: #b98600;
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #1c2230;
  --muted: #6b7280;
  --border: #e3e6eb;
  --win: #1a9d5c;
  --tie: #a15c00;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.app-header {
  background: linear-gradient(90deg, var(--vn-dark), var(--vn) 45%, var(--cn) 55%, var(--cn-dark));
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px 8px;
  max-width: 1100px;
  margin: 0 auto;
}

.header-inner h1 {
  margin: 0;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.flag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}
.flag.vn { background: var(--vn-dark); }
.flag.cn { background: var(--cn-dark); }

.btn {
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.85rem;
  cursor: pointer;
  font-weight: 600;
}
.btn-ghost {
  background: rgba(255,255,255,0.18);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255,255,255,0.3); }

.tab-nav {
  display: flex;
  gap: 4px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 12px;
  overflow-x: auto;
}

.tab-btn {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  font-size: 0.9rem;
  white-space: nowrap;
  font-weight: 600;
  opacity: 0.85;
}
.tab-btn.active {
  background: var(--bg);
  color: var(--ink);
  opacity: 1;
}

main#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 18px;
}

h2.page-title { margin-top: 4px; }
.subtitle { color: var(--muted); margin-top: -8px; margin-bottom: 20px; }

.intro-card .intro-title {
  margin: 0 0 10px;
  font-size: 1.25rem;
}
.intro-card h4 {
  margin: 18px 0 8px;
  font-size: 1rem;
}
.intro-card ul {
  margin: 0 0 8px;
  padding-left: 22px;
}
.intro-card li {
  margin-bottom: 6px;
}
.intro-card a {
  color: var(--vn-dark);
  font-weight: 600;
}
.intro-card .intro-closing {
  margin-top: 18px;
  font-style: italic;
  color: var(--muted);
}

.scoreboard {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  text-align: center;
  padding: 20px 10px;
}
.scoreboard .team-block { }
.scoreboard .team-name { font-weight: 700; font-size: 1.1rem; margin-bottom: 6px; }
.scoreboard .team-block.vn .team-name { color: var(--vn-dark); }
.scoreboard .team-block.cn .team-name { color: var(--cn-dark); }
.scoreboard .score { font-size: 3rem; font-weight: 800; line-height: 1; }
.scoreboard .team-block.vn .score { color: var(--vn); }
.scoreboard .team-block.cn .score { color: var(--cn-dark); }
.scoreboard .vs { color: var(--muted); font-weight: 700; }
.scoreboard .subscore { color: var(--muted); font-size: 0.8rem; margin-top: 4px; }

.champion-banner {
  text-align: center;
  padding: 10px;
  border-radius: 8px;
  font-weight: 700;
  margin-top: 6px;
}
.champion-banner.vn { background: #fde7e8; color: var(--vn-dark); }
.champion-banner.cn { background: #fff3d6; color: var(--cn-dark); }
.champion-banner.tie { background: #eef0f3; color: var(--muted); }

table.summary-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}
table.summary-table th, table.summary-table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
table.summary-table th { color: var(--muted); font-weight: 600; }

.status-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}
.status-pill.win-vn { background: #fde7e8; color: var(--vn-dark); }
.status-pill.win-cn { background: #fff3d6; color: var(--cn-dark); }
.status-pill.tie { background: #f1e6d0; color: var(--tie); }
.status-pill.pending { background: #eef0f3; color: var(--muted); }

.matrix-scroll {
  overflow-x: auto;
}

table.matrix-table {
  border-collapse: separate;
  border-spacing: 4px;
  width: 100%;
}

.matrix-table .corner-cell,
.matrix-table .col-head,
.matrix-table .row-head {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  padding: 6px 8px;
  text-align: center;
  white-space: nowrap;
}
.matrix-table .corner-cell {
  font-size: 0.7rem;
  font-weight: 600;
}
.matrix-table .col-head {
  border-bottom: 2px solid var(--cn-dark);
  color: var(--cn-dark);
}
.matrix-table .row-head {
  text-align: right;
  border-right: 2px solid var(--vn-dark);
  color: var(--vn-dark);
  position: sticky;
  left: 0;
  background: var(--card);
}

.matrix-cell {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 6px;
  background: #fbfbfc;
  text-align: center;
  white-space: nowrap;
}
.matrix-cell.result-vn { background: #fde7e8; border-color: #f4c1c6; }
.matrix-cell.result-cn { background: #fff3d6; border-color: #f0dca3; }
.matrix-cell.result-tie { background: #f1e6d0; border-color: #e4cf9c; }

.cell-scores {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  margin-bottom: 4px;
}

.score-input {
  width: 56px;
  padding: 8px 6px;
  text-align: center;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-weight: 700;
}
.score-input.tiny {
  width: 34px;
  padding: 5px 3px;
  font-size: 0.85rem;
}

.date-input {
  width: 100%;
  padding: 4px 3px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--muted);
  background: #fff;
}
.matrix-cell .date-input {
  width: 84px;
}

.dash { color: var(--muted); font-weight: 700; }

.roster-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 10px;
}
@media (max-width: 640px) {
  .roster-section { grid-template-columns: 1fr; }
}

.roster-col h3 { margin-bottom: 8px; font-size: 0.95rem; }
.roster-col.vn h3 { color: var(--vn-dark); }
.roster-col.cn h3 { color: var(--cn-dark); }

.entrant-edit-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.entrant-edit-row .idx {
  width: 18px;
  color: var(--muted);
  font-size: 0.8rem;
}

.sub-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  margin: 12px 0 6px;
}
.sub-label:first-child { margin-top: 0; }

.doubles-match-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.doubles-match-row {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  background: #fbfbfc;
}

.doubles-match-row .match-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.doubles-match-row .match-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 700;
}
.doubles-match-row .match-head-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.doubles-match-row .match-head-right .date-input {
  width: 140px;
}

.doubles-match-row .teams-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
}
@media (max-width: 640px) {
  .doubles-match-row .teams-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

.team-pair-fixed {
  padding: 9px 10px;
  border-radius: 6px;
  background: #fff;
  border: 1px solid var(--border);
  font-weight: 600;
  text-align: center;
}
.team-pair-fixed.vn-side { border-left: 4px solid var(--vn); }
.team-pair-fixed.cn-side { border-left: 4px solid var(--cn); }

.score-pair {
  display: flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
}

.text-input {
  flex: 1;
  padding: 7px 9px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 0.88rem;
}

details.editor {
  margin-top: 6px;
}
details.editor summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 4px 0;
}

.sudden-death {
  border: 2px dashed var(--tie);
  border-radius: var(--radius);
  padding: 14px;
  margin-top: 14px;
  background: #fffaf0;
}
.sudden-death h4 {
  margin: 0 0 8px;
  color: var(--tie);
}
.sd-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto 1fr;
  gap: 10px;
  align-items: center;
}
.sd-row .text-input { padding: 8px; }

.hint {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 8px;
}

.footer-note {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 30px;
}

.score-input:disabled, .text-input:disabled, .date-input:disabled {
  background: #f1f2f4;
  color: var(--muted);
  cursor: not-allowed;
}

.login-wrap {
  display: flex;
  justify-content: center;
  padding: 40px 10px;
}

.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  width: 100%;
  max-width: 360px;
}

.login-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 14px;
}
.login-label .text-input {
  display: block;
  width: 100%;
  margin-top: 6px;
}

.login-error {
  color: var(--vn-dark);
  font-size: 0.85rem;
  font-weight: 600;
  margin: -4px 0 10px;
}

.login-submit {
  width: 100%;
  margin-top: 6px;
  background: var(--vn-dark);
  color: #fff;
  padding: 10px 14px;
}
.login-submit:hover { background: var(--vn); }

.login-divider {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  margin: 18px 0;
}

.view-only-link {
  display: block;
  text-align: center;
  color: var(--cn-dark);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}
.view-only-link:hover { text-decoration: underline; }

.stat-bubble-row {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 6px 0 22px;
}
.stat-bubble-wrap {
  text-align: center;
}
.stat-bubble-team {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.stat-bubble-team.vn { color: var(--vn-dark); }
.stat-bubble-team.cn { color: var(--cn-dark); }
.stat-bubble-leader {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 10px;
}
.stat-bubble {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  box-shadow: 0 4px 10px rgba(0,0,0,0.12);
}
.stat-bubble.vn { background: linear-gradient(135deg, var(--vn), var(--vn-dark)); }
.stat-bubble.cn { background: linear-gradient(135deg, var(--cn), var(--cn-dark)); }
.stat-bubble-sub {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--muted);
}

.pairs-block .sub-label:first-child { margin-top: 0; }
.pair-row-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
  margin-bottom: 6px;
}
@media (max-width: 480px) {
  .pair-row-list { grid-template-columns: 1fr; }
}
.pair-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 7px 10px;
  background: #fbfbfc;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
}
.pair-plus {
  color: var(--muted);
  font-weight: 700;
}

table.games-table .player-name-cell {
  font-weight: 700;
  white-space: nowrap;
}
table.games-table .player-name-cell.vn { color: var(--vn-dark); }
table.games-table .player-name-cell.cn { color: var(--cn-dark); }
.games-cell {
  text-align: center;
}
.games-remaining {
  font-size: 1.15rem;
  font-weight: 800;
}
.games-played {
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
}