* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f5f7fb;
  color: #1a1f2b;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
}

.app {
  width: min(920px, 100%);
  background: #ffffff;
  border: 1px solid #dfe4ee;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.5rem, 2vw, 2rem);
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.2rem;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tab-button {
  border: 1px solid #cfd6e4;
  background: #ffffff;
  color: #1a1f2b;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-button:hover {
  background: #f0f4ff;
}

.tab-button.active {
  background: #4F46E5;
  color: #ffffff;
  border-color: #4F46E5;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.matchup-form {
  margin-top: 1rem;
}

.matchup-select-row {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 1rem;
  justify-content: center;
}

.matchup-player-block {
  flex: 1;
  min-width: 200px;
  max-width: 280px;
  border: 1px solid #dfe4ee;
  border-radius: 12px;
  padding: 1rem;
  background: #fbfcff;
}

.matchup-player-block label {
  margin-top: 0;
}

.matchup-player-block select {
  margin-bottom: 0.75rem;
}

.matchup-elo {
  font-size: 1.1rem;
  font-weight: 700;
  color: #334155;
  margin: 0 0 0.25rem;
}

.matchup-chance {
  font-size: 1rem;
  font-weight: 600;
  color: #4F46E5;
  margin: 0;
}

.matchup-elo-gain {
  font-size: 0.9rem;
  font-weight: 600;
  color: #64748b;
  margin: 0 0 0.25rem;
}

.matchup-vs {
  display: flex;
  align-items: center;
  font-weight: 700;
  color: #64748b;
  font-size: 1.5rem;
}

.matchup-last5 {
  margin: 0.5rem 0 0;
  font-size: 1rem;
  font-weight: 600;
  color: #334155;
}

.matchup-last5 .form-w {
  color: #059669;
}

.matchup-last5 .form-l {
  color: #dc2626;
}

.record-score-title {
  margin: 1.5rem 0 0.75rem;
  font-size: 1.2rem;
}

.record-score-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.record-score-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: flex-end;
}

.record-score-cell {
  flex: 1;
  min-width: 160px;
  max-width: 280px;
}

.record-score-cell label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
}

.record-score-cell input {
  width: 100%;
}

.record-score-form .actions {
  margin-top: 0.25rem;
}

.match-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 320px));
  gap: 1rem;
  align-items: start;
  justify-content: center;
}

.player-card {
  border: 1px solid #dfe4ee;
  border-radius: 12px;
  padding: 1rem;
  background: #fbfcff;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  margin-top: 0.4rem;
}

select,
input {
  width: 100%;
  border: 1px solid #cdd6e5;
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  font-size: 1rem;
  background: #ffffff;
}

input {
  font-size: 1.5rem;
  text-align: center;
  min-height: 64px;
}

input:focus,
select:focus,
.tab-button:focus,
.primary-btn:focus {
  outline: 2px solid #4F46E5;
  outline-offset: 2px;
}

.actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  gap: 0.9rem;
}

.primary-btn {
  border: 0;
  border-radius: 10px;
  padding: 0.75rem 1rem;
  font-weight: 700;
  background: #1f8f57;
  color: #ffffff;
  cursor: pointer;
}

.primary-btn:hover {
  background: #197446;
}

.secondary-btn {
  border: 1px solid #cfd6e4;
  border-radius: 10px;
  padding: 0.75rem 1rem;
  font-weight: 700;
  background: #ffffff;
  color: #1a1f2b;
  cursor: pointer;
}

.secondary-btn:hover {
  background: #f0f4ff;
}

.secondary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: #f8fafc;
}

.save-message {
  margin-top: 0.35rem;
  min-height: 1rem;
  font-weight: 600;
  display: none;
}

.messages {
  margin-top: 0.75rem;
}

.save-message.visible {
  display: block;
}

.error-missing-players {
  color: #b42318;
}

.error-same-player {
  color: #9e1c1c;
}

.error-min-score {
  color: #9e1c1c;
}

.error-score-difference {
  color: #9e1c1c;
}

.success-match-saved {
  color: #1f8f57;
}

.panel-note {
  color: #4a5568;
}

.add-player-hint {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
}

.add-player-form {
  margin-bottom: 1rem;
}

.add-player-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.add-player-row input {
  min-height: 44px;
  font-size: 1rem;
  text-align: left;
}

.add-player-message {
  margin-top: 0.5rem;
  min-height: 1rem;
  font-weight: 600;
}

.add-player-message.success {
  color: #1f8f57;
}

.add-player-message.error {
  color: #b42318;
}

.scoreboard-wrap {
  border: 1px solid #e1e7f2;
  border-radius: 12px;
  overflow-x: auto;
  background: #fbfcff;
}

.scoreboard-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
}

.scoreboard-table th,
.scoreboard-table td {
  text-align: left;
  padding: 0.7rem;
  border-bottom: 1px solid #e8edf6;
}

.scoreboard-table th {
  font-size: 0.9rem;
  color: #334155;
  background: #f2f5fb;
}

.sort-button {
  font: inherit;
  font-weight: 600;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.sort-button:hover {
  color: #1d4ed8;
}

.sort-button.active {
  color: #4F46E5;
}

.scoreboard-table tbody tr:last-child td {
  border-bottom: 0;
}

.history-header {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(90px, 0.7fr) minmax(100px, 0.6fr) minmax(110px, 0.8fr);
  align-items: center;
  border: 1px solid #e1e7f2;
  border-radius: 12px;
  background: #f2f5fb;
  margin-bottom: 0.5rem;
}

.history-header-cell {
  padding: 0.55rem 0.7rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: #334155;
  border-right: 1px solid #e1e7f2;
}

.history-header-cell:last-child {
  border-right: 0;
}

.history-list {
  border: 1px solid #e1e7f2;
  border-radius: 12px;
  padding: 0;
  background: #fbfcff;
  overflow: hidden;
}

.history-item {
  padding: 0;
  border-bottom: 1px solid #e8edf6;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(90px, 0.7fr) minmax(100px, 0.6fr) minmax(110px, 0.8fr);
  align-items: center;
  min-height: 44px;
}

.history-cell {
  padding: 0.55rem 0.7rem;
  border-right: 1px solid #e8edf6;
}

.history-matchup {
  font-weight: 600;
}

.history-score {
  font-weight: 700;
  text-align: center;
}

.history-elo {
  font-size: 0.9rem;
  font-weight: 600;
  color: #475569;
  text-align: center;
}

.history-date {
  color: #64748b;
}

.history-item:last-child {
  border-bottom: 0;
}

.history-list .panel-note {
  padding: 0.75rem;
}

/* Dashboard */
.dashboard-player-row {
  margin-bottom: 1.25rem;
}
.dashboard-player-row label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
}
.dashboard-player-row select {
  max-width: 280px;
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 600px) {
  .dashboard-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

.dashboard-stat-card {
  border: 1px solid #dfe4ee;
  border-radius: 12px;
  padding: 1rem;
  background: #fbfcff;
}
.dashboard-stat-label {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #64748b;
}
.dashboard-stat-value {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: #334155;
}

.dashboard-elo-section {
  margin-bottom: 1.5rem;
}
.dashboard-section-title {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: #334155;
}

.dashboard-elo-period {
  margin: 0 0 0.65rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: #64748b;
}
.dashboard-elo-graph {
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 0.75rem;
  background: #fafbfc;
  overflow: hidden;
}
.dashboard-elo-graph svg {
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  min-height: 220px;
  display: block;
}
.dashboard-elo-empty {
  margin: 0;
  padding: 0.75rem 0;
}

.dashboard-history-section {
  margin-bottom: 0;
}
.dashboard-match-history {
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #fbfcff;
  overflow: hidden;
}
.dashboard-match-history .panel-note {
  padding: 0.75rem;
  margin: 0;
}

.dashboard-match-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 0.95rem;
}

.dashboard-match-table thead th {
  padding: 0.55rem 0.75rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #475569;
  background: #f1f5f9;
  border-bottom: 1px solid #e2e8f0;
  text-align: left;
  vertical-align: bottom;
}

.dashboard-match-th--result {
  width: 3rem;
  text-align: center !important;
}

.dashboard-match-th--opponent {
  width: auto;
}

.dashboard-match-th--num {
  width: 4.75rem;
  text-align: right !important;
}

.dashboard-match-th--date {
  width: 6.5rem;
  text-align: right !important;
}

.dashboard-match-table tbody td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid #e8edf6;
  vertical-align: middle;
  color: #334155;
}

.dashboard-match-table tbody tr:last-child td {
  border-bottom: 0;
}

.dashboard-match-td--result {
  text-align: center;
}

.dashboard-match-td--opponent {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dashboard-match-td--num {
  text-align: right;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #475569;
}

.dashboard-match-td--date {
  text-align: right;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: #64748b;
}

.dashboard-history-result {
  font-weight: 700;
  display: inline-block;
  min-width: 1.25rem;
}
.dashboard-history-result.win {
  color: #059669;
}
.dashboard-history-result.loss {
  color: #dc2626;
}

.dashboard-match-elo {
  font-weight: 600;
  color: #64748b;
}
.dashboard-match-elo.positive {
  color: #059669;
}
.dashboard-match-elo.negative {
  color: #dc2626;
}

@media (max-width: 700px) {
  .match-form {
    grid-template-columns: minmax(220px, 1fr);
  }

  .record-score-row {
    flex-direction: column;
  }

  .record-score-cell {
    max-width: none;
  }

}