:root {
  --bg: #faf9f7;
  --card: #ffffff;
  --border: #e5e3df;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --gain: #16a34a;
  --loss: #dc2626;
  --highlight: #fef3c7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.4;
}

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.title { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.title h1 { margin: 0; font-size: 18px; font-weight: 600; }
.back { color: var(--muted); text-decoration: none; font-size: 20px; padding: 4px 8px; }

.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.tab {
  background: transparent;
  border: none;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.admin-tab { margin-left: auto; }

main { padding: 16px; max-width: 900px; margin: 0 auto; }
.view.hidden { display: none; }
.hidden { display: none !important; }
.hint { color: var(--muted); font-size: 13px; margin: 12px 0; }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--danger); margin: 8px 0; }

/* Piramit */
.pyramid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
}
.pyramid-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
}
.pyramid-slot {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  min-width: 80px;
  text-align: center;
  font-size: 12px;
}
.pyramid-slot .name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pyramid-slot .rating { color: var(--muted); font-size: 11px; }
.pyramid-row:nth-child(1) .pyramid-slot { background: #fef3c7; border-color: #fcd34d; }
.pyramid-row:nth-child(2) .pyramid-slot { background: #fef9c3; border-color: #fde68a; }
.pyramid-row:nth-child(3) .pyramid-slot { background: #fefce8; }

/* Sıralama */
.search-row { margin-bottom: 12px; }
#searchInput {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
}

.leaderboard {
  width: 100%;
  background: var(--card);
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 14px;
}
.leaderboard th, .leaderboard td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.leaderboard th { background: #f5f4f2; font-weight: 600; font-size: 13px; }
.leaderboard td.num, .leaderboard th.num { text-align: right; font-variant-numeric: tabular-nums; }
.leaderboard tbody tr:last-child td { border-bottom: none; }
.leaderboard tbody tr.provisional td:nth-child(3)::after {
  content: " ?";
  color: var(--muted);
  font-size: 11px;
}

/* Maçlar */
.matches { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.match-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}
.match-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--muted);
}
.match-players { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.match-player { flex: 1; }
.match-player.winner { font-weight: 700; }
.match-player .delta { font-size: 12px; }
.match-player .delta.gain { color: var(--gain); }
.match-player .delta.loss { color: var(--loss); }
.match-vs { color: var(--muted); font-size: 12px; }
.match-sets { margin-top: 6px; font-size: 13px; color: var(--muted); }
.match-note { margin-top: 6px; font-size: 13px; font-style: italic; color: var(--muted); }

/* Bilgi */
.info-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
}
.info-card h2 { margin-top: 20px; margin-bottom: 8px; font-size: 17px; }
.info-card h2:first-child { margin-top: 0; }
.info-card h3 { margin-top: 12px; margin-bottom: 6px; font-size: 14px; }
.info-card ul { margin: 8px 0; padding-left: 20px; }
.formula {
  background: #f5f4f2;
  padding: 10px 12px;
  border-radius: 6px;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12.5px;
  overflow-x: auto;
  margin: 8px 0;
  line-height: 1.5;
}
.ranges { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 6px; }
.ranges td { padding: 4px 8px; border-bottom: 1px solid var(--border); }
.ranges td:first-child { font-family: ui-monospace, monospace; color: var(--muted); width: 110px; }

/* Admin */
.form { display: flex; flex-direction: column; gap: 12px; }
.form label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.form input, .form select, .form textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  font-family: inherit;
  background: white;
}
.form button, #logoutBtn, #seedBtn, #undoBtn, #loginForm button {
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  background: var(--primary);
  color: white;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.form button:hover, #loginForm button:hover { background: var(--primary-dark); }
.danger { background: var(--danger) !important; margin-top: 8px; }
.link { background: transparent !important; color: var(--primary) !important; padding: 4px 8px !important; font-weight: 400 !important; }

#loginForm { display: flex; gap: 8px; max-width: 320px; }
#loginForm input { flex: 1; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 15px; }

.admin-header { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; background: var(--card); border: 1px solid var(--border); border-radius: 6px; margin-bottom: 12px; }

details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  padding: 0 16px;
}
details summary { padding: 12px 0; cursor: pointer; list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary h3 { display: inline; margin: 0; font-size: 15px; }
details[open] summary { border-bottom: 1px solid var(--border); margin-bottom: 12px; }
details > *:last-child { padding-bottom: 16px; }

.sets { border: 1px solid var(--border); border-radius: 6px; padding: 8px; }
.sets legend { font-size: 12px; color: var(--muted); padding: 0 4px; }
.set-row { display: flex; align-items: center; gap: 6px; margin: 4px 0; }
.set-row input { width: 60px; }

.preview {
  background: var(--highlight);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-family: ui-monospace, monospace;
  min-height: 20px;
}
.preview:empty { display: none; }

.player-manage { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; max-height: 60vh; overflow-y: auto; }
.player-manage li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  gap: 8px;
}
.player-manage .pm-info { flex: 1; min-width: 0; }
.player-manage .pm-name { font-weight: 600; }
.player-manage .pm-meta { font-size: 12px; color: var(--muted); }
.player-manage .pm-del {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}
.player-manage .pm-del:hover { background: var(--danger); color: white; }

.calc-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
}
.calc-card h2 { margin: 0 0 8px; font-size: 17px; }
.calc-selects { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
.calc-selects label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.calc-selects select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  background: white;
}
@media (max-width: 480px) {
  .calc-selects { grid-template-columns: 1fr; }
}
.calc-result { display: flex; flex-direction: column; gap: 10px; min-height: 60px; }
.calc-scenario {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  background: #fafaf8;
}
.calc-scenario-title { font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.calc-rows { display: flex; flex-direction: column; gap: 4px; font-size: 13px; font-family: ui-monospace, monospace; }
.calc-rows .gain { color: var(--gain); }
.calc-rows .loss { color: var(--loss); }
.calc-meta { font-size: 12px; color: var(--muted); margin-top: 4px; }
.calc-prov { color: #b45309; font-weight: 500; }
.calc-empty { color: var(--muted); font-size: 14px; padding: 20px 0; text-align: center; }