:root {
  color-scheme: light;
  --ink: #14213d;
  --muted: #64748b;
  --line: #d9e2ec;
  --paper: #ffffff;
  --bg: #f6f8fb;
  --blue: #1459ff;
  --blue-soft: #e8efff;
  --green: #00875a;
  --red: #d13f3f;
  --gold: #e7b10a;
  --shadow: 0 10px 25px rgba(20, 33, 61, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
}

button,
input,
select {
  font: inherit;
}

button {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  background: var(--blue);
  color: white;
  padding: 0 14px;
  cursor: pointer;
  font-weight: 700;
}

button.secondary {
  background: #e2e8f0;
  color: var(--ink);
}

button.ghost {
  background: transparent;
  color: var(--blue);
  border: 1px solid var(--line);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

input,
select {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  padding: 0 12px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(246, 248, 251, 0.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  padding: 14px clamp(16px, 4vw, 36px);
}

.title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin: 2px 0 12px;
}

.topbar h1 {
  margin: 0;
  font-size: clamp(24px, 6vw, 38px);
  letter-spacing: 0;
}

.system-clock {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.eyebrow {
  margin: 0;
  color: var(--blue);
  font-weight: 800;
  font-size: 13px;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.tabs button {
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.tabs button.active {
  background: var(--ink);
  color: white;
}

main {
  width: min(1360px, 100%);
  margin: 0 auto;
  padding: 18px clamp(14px, 3vw, 28px) 48px;
}

.auth-panel,
.user-panel,
.notice,
.share-card,
.table-card,
.match-card,
.round-card,
.score-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.auth-panel {
  display: grid;
  gap: 18px;
  padding: 18px;
  margin-bottom: 18px;
}

.auth-panel h2,
.section-title h2 {
  margin: 0 0 6px;
  font-size: 22px;
}

.auth-panel p,
.section-title p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.auth-form {
  display: grid;
  gap: 10px;
}

.user-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 14px;
  margin-bottom: 18px;
}

.user-panel span {
  color: var(--muted);
  display: block;
  margin-top: 2px;
  font-size: 14px;
}

.notice {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-left: 4px solid var(--blue);
}

.section-title {
  margin: 26px 0 14px;
}

.bracket-heading {
  margin-top: 34px;
}

.chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.chips button {
  flex: 0 0 auto;
  background: white;
  color: var(--ink);
  border: 1px solid var(--line);
}

.chips .group-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 46px;
  padding: 0 12px;
}

.chips button.active {
  background: var(--blue);
  color: white;
}

.group-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.15em;
  font-family: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-weight: 900;
  letter-spacing: 0;
}

.match-list {
  display: grid;
  gap: 10px;
}

.match-card {
  padding: 12px;
}

.match-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 10px;
}

.match-meta .group-letter {
  color: var(--ink);
}

.teams {
  display: grid;
  gap: 8px;
}

.team-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px;
}

.team-name {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 8px;
  font-weight: 800;
}

.team-name span:last-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pick-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.pick-options.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pick-options button {
  background: #eef2f7;
  color: var(--ink);
  border: 1px solid transparent;
  min-width: 0;
  min-height: 48px;
  padding: 7px 8px;
  line-height: 1.2;
  white-space: normal;
  overflow-wrap: anywhere;
}

.pick-options button.selected {
  background: var(--blue);
  color: white;
}

.pick-options button.locked {
  background: #f1f5f9;
  color: var(--muted);
}

.pick-options button.selected.locked,
.pick-options button.selected:disabled,
.bracket-team.selected:disabled {
  background: var(--blue);
  color: white;
  opacity: 1;
}

.pick-status {
  margin-top: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.35;
}

.pick-status.hit {
  background: #eaf8ef;
  color: var(--green);
}

.pick-status.pending {
  background: var(--blue-soft);
  color: var(--ink);
}

.pick-status.missed {
  background: #fff1f1;
  color: var(--red);
}

.bracket {
  overflow-x: auto;
  padding: 0 0 18px;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-inline: contain;
}

.bracket-board {
  min-width: 1180px;
}

.bracket-labels,
.bracket-columns {
  display: grid;
  grid-template-columns: repeat(5, minmax(220px, 1fr));
  gap: 12px;
  align-items: start;
}

.bracket-labels {
  background: var(--bg);
  padding: 0 0 8px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 10px;
}

.bracket-labels h3 {
  margin: 0;
  font-size: 16px;
  text-align: center;
}

.bracket-column {
  display: grid;
  gap: 8px;
  align-self: start;
}

.bracket-stack {
  display: grid;
  gap: 12px;
  align-content: start;
}

.bracket-node {
  position: relative;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 18px rgba(20, 33, 61, 0.06);
  padding: 8px;
}

.bracket-node.championship {
  border-color: var(--gold);
  box-shadow: 0 10px 24px rgba(231, 177, 10, 0.18);
}

.bracket-node-meta,
.bracket-stadium {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.bracket-node-meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 7px;
}

.bracket-stadium {
  margin-top: 7px;
  min-height: 28px;
}

.bracket-node .pick-status {
  font-size: 12px;
  padding: 7px 8px;
}

.bracket-team {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  min-height: 34px;
  margin-top: 5px;
  padding: 5px 8px;
  background: #eef2f7;
  color: var(--ink);
  border: 1px solid transparent;
  text-align: left;
  line-height: 1.2;
}

.bracket-team.selected {
  background: var(--blue);
  color: white;
}

.bracket-team .team-name {
  width: 100%;
}

.bracket-team .team-name span:last-child {
  white-space: normal;
}

.cards {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.score-card {
  padding: 14px;
}

.score-card strong {
  display: block;
  font-size: 24px;
  margin-top: 8px;
}

.table-card {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  color: var(--muted);
  font-size: 13px;
}

.share-card {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.sync-panel {
  margin-bottom: 14px;
}

.sync-card {
  display: grid;
  gap: 12px;
  align-items: center;
  background: white;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 14px;
}

.sync-card.needs-review {
  border-color: var(--gold);
}

.sync-card p {
  margin: 4px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.sync-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

@media (max-width: 520px) {
  .topbar {
    padding: 12px 14px;
  }

  .topbar h1 {
    margin-bottom: 0;
  }

  .title-row {
    margin-bottom: 10px;
    gap: 4px 10px;
  }

  .system-clock {
    font-size: 12px;
  }

  .tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .tabs button {
    min-height: 38px;
    padding: 0 8px;
    font-size: 14px;
  }

  main {
    padding: 14px 10px 40px;
  }

  .auth-panel,
  .user-panel,
  .match-card,
  .share-card,
  .sync-card {
    padding: 12px;
  }

  .section-title {
    margin: 20px 0 12px;
  }

  .auth-panel h2,
  .section-title h2 {
    font-size: 20px;
  }

  .match-meta {
    gap: 5px 7px;
    font-size: 12px;
  }

  .team-name {
    gap: 6px;
  }

  .pick-options {
    gap: 6px;
  }

  .pick-options button {
    min-height: 44px;
    padding: 6px;
    font-size: 14px;
  }

  .bracket-board {
    min-width: 1040px;
  }

  .bracket-labels,
  .bracket-columns {
    grid-template-columns: repeat(5, minmax(190px, 1fr));
    gap: 10px;
  }

  .bracket-node-meta {
    display: grid;
    gap: 3px;
  }

  .bracket-team {
    min-height: 36px;
    padding: 6px 8px;
  }

  .bracket-stadium {
    min-height: 0;
  }
}

.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
}

.toggle input {
  width: auto;
}

.admin-grid {
  display: grid;
  gap: 8px;
}

.admin-row {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
  padding-top: 10px;
}

.hidden {
  display: none !important;
}

.success {
  color: var(--green);
}

.danger {
  color: var(--red);
}

@media (min-width: 760px) {
  .topbar {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
  }

  .tabs {
    display: flex;
  }

  .auth-panel {
    grid-template-columns: 1fr minmax(360px, 430px);
    align-items: center;
  }

  .auth-form {
    grid-template-columns: 1fr 1fr auto auto;
  }

  .admin-row {
    grid-template-columns: 1.2fr 1.2fr 0.8fr 0.8fr 0.8fr auto;
    align-items: center;
  }
}