:root {
  --paper: #FAF9F6;
  --panel: #F1EFEA;
  --panel-raised: #FFFFFF;
  --ink: #1B1F2A;
  --ink-soft: #6B7280;
  --line: rgba(27,31,42,0.10);
  --cobalt: #3F3DBF;
  --cobalt-soft: rgba(63,61,191,0.12);
  --amber: #E8A33D;
  --amber-soft: rgba(232,163,61,0.16);
  --coral: #E1583F;
  --coral-soft: rgba(225,88,63,0.14);
  --green: #1E8A5F;
  --green-soft: rgba(30,138,95,0.14);
  --shadow: 0 1px 2px rgba(27,31,42,0.04), 0 8px 24px rgba(27,31,42,0.06);
  --radius: 12px;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

[data-theme="dark"] {
  --paper: #14171F;
  --panel: #1B1F2A;
  --panel-raised: #202537;
  --ink: #ECEAE3;
  --ink-soft: #93989F;
  --line: rgba(236,234,227,0.10);
  --cobalt: #7A78E8;
  --cobalt-soft: rgba(122,120,232,0.18);
  --amber: #F0B65C;
  --amber-soft: rgba(240,182,92,0.18);
  --coral: #F0796A;
  --coral-soft: rgba(240,121,106,0.18);
  --green: #47C08C;
  --green-soft: rgba(71,192,140,0.16);
  --shadow: 0 1px 2px rgba(0,0,0,0.2), 0 8px 24px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
}

.app {
  min-height: 100vh;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

/* Header */
.app-header {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 20px 18px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--cobalt);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2em;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4em;
  margin: 0;
  letter-spacing: -0.01em;
}

.brand-sub {
  margin: 2px 0 0;
  color: var(--ink-soft);
  font-size: 0.82em;
  text-transform: capitalize;
}

.leaderboard {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-left: auto;
}

.lb-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-raised);
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 6px 12px 6px 8px;
  font-size: 0.85em;
  box-shadow: var(--shadow);
}

.lb-rank {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--panel);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.75em;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.lb-chip.leading .lb-rank {
  background: var(--amber-soft);
  color: var(--amber);
}

.lb-name {
  font-weight: 600;
  color: var(--ink);
}

.lb-score {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink-soft);
}

.lb-chip.leading .lb-score { color: var(--amber); }

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel-raised);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.theme-toggle:hover { border-color: var(--cobalt); color: var(--cobalt); }

/* Tabs */
.tabs {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 4px;
  position: relative;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}

.tab-btn {
  background: transparent;
  border: none;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92em;
  color: var(--ink-soft);
  padding: 12px 6px;
  margin-right: 20px;
  cursor: pointer;
  position: relative;
}

.tab-btn.active { color: var(--cobalt); }

.tab-indicator {
  position: absolute;
  bottom: -1px;
  height: 2px;
  background: var(--cobalt);
  transition: left 0.25s ease, width 0.25s ease;
}

/* Panels */
.tab-panel { display: none; }
.tab-panel.active {
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-card {
  background: var(--panel-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.panel-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.card-subheading {
  font-family: var(--font-display);
  font-size: 1.05em;
  font-weight: 600;
  margin: 0 0 16px;
}

.panel-card-head h2 { margin: 0; font-family: var(--font-display); font-size: 1.05em; }

.pill {
  font-family: var(--font-mono);
  font-size: 0.78em;
  color: var(--ink-soft);
  background: var(--panel);
  padding: 4px 10px;
  border-radius: 100px;
}

/* Input grid */
.input-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.player-field { display: flex; flex-direction: column; gap: 6px; }

.player-field label {
  font-size: 0.82em;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: text;
  border-bottom: 1px dashed transparent;
  width: fit-content;
}

.player-field label:hover { border-bottom-color: var(--ink-soft); }

.player-field input[type="number"] {
  font-family: var(--font-mono);
  padding: 12px 14px;
  border-radius: 8px;
  border: 1.5px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-size: 1.1em;
  font-weight: 600;
  width: 100%;
}

.player-field input[type="number"]:focus {
  outline: none;
  border-color: var(--cobalt);
  box-shadow: 0 0 0 3px var(--cobalt-soft);
}

.actions-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* Buttons */
.btn {
  border: none;
  border-radius: 8px;
  padding: 11px 18px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9em;
  cursor: pointer;
  transition: transform 0.1s ease, opacity 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary { background: var(--cobalt); color: #fff; }
.btn-primary:hover { opacity: 0.9; }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--line);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--cobalt); color: var(--cobalt); }

.btn-danger {
  background: transparent;
  border: 1.5px solid var(--coral);
  color: var(--coral);
}
.btn-danger:hover { background: var(--coral); color: #fff; }

.btn.small { padding: 7px 12px; font-size: 0.82em; }
.file-label { display: inline-flex; align-items: center; }

/* History toolbar */
.history-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 4px;
}
.history-toolbar h2 { margin: 0 0 16px; }
.toolbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Tables */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }

th, td {
  padding: 10px 8px;
  text-align: center;
  border-bottom: 1px solid var(--line);
  font-size: 0.9em;
  font-family: var(--font-mono);
}

th {
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.72em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-body);
}

td:first-child, th:first-child { text-align: left; color: var(--ink-soft); font-size: 0.85em; }
.action-col { width: 36px; }

.editable-cell { cursor: pointer; border-radius: 4px; font-weight: 600; }
.editable-cell:hover { background: var(--cobalt-soft); }

.round-winner { color: var(--green); font-weight: 700; }
.round-loser { color: var(--coral); font-weight: 700; }

.btn-delete {
  background: transparent; border: none;
  color: var(--ink-soft); cursor: pointer; font-size: 1.05em;
}
.btn-delete:hover { color: var(--coral); }

.empty-row td {
  font-family: var(--font-body);
  color: var(--ink-soft);
  font-style: italic;
  padding: 24px 8px;
}

/* Stat cards */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.stat-card {
  background: var(--panel-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.stat-card .stat-label {
  font-size: 0.78em;
  color: var(--ink-soft);
  font-weight: 600;
  margin-bottom: 10px;
}

.stat-card .stat-rows { display: flex; flex-direction: column; gap: 6px; }

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9em;
}

.stat-row .name { font-weight: 500; }
.stat-row .val { font-family: var(--font-mono); font-weight: 600; }

.stat-card.highlight .stat-row:first-child .val { color: var(--amber); }

/* Charts */
.chart-box { position: relative; height: 280px; }

/* Footer */
.footer-note {
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.8em;
  padding: 10px 20px 40px;
}

@media (max-width: 640px) {
  .leaderboard { margin-left: 0; order: 3; width: 100%; }
  .app-header { justify-content: flex-start; }
}