:root {
  --bg: #0f1115;
  --card: #171a21;
  --border: #2a2e37;
  --text: #e6e8ec;
  --muted: #9aa1ac;
  --accent: #6ea8fe;
  --win: #34d399;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN", sans-serif;
  padding: 24px;
}

header { max-width: 900px; margin: 0 auto 24px; }
header h1 { margin: 0 0 4px; font-size: 1.6rem; }
header .sub { margin: 0; color: var(--muted); font-size: 0.9rem; }

.card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 8px; }

textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.95rem;
  resize: vertical;
  font-family: inherit;
}

.setup-actions { display: flex; align-items: center; gap: 12px; margin-top: 14px; }

.btn {
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #1e2129;
  color: var(--text);
  font-size: 0.9rem;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.primary { background: var(--accent); color: #0f1115; border-color: var(--accent); font-weight: 600; }

.msg { font-size: 0.85rem; color: var(--muted); }
.msg.error { color: #ff6b6b; }
.msg.ok { color: var(--win); }

.hide { display: none !important; }

.toolbar {
  max-width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

#bracket-scroll {
  overflow-x: auto;
  padding: 20px 40px 40px 4px;
}

.bracket {
  display: grid;
  grid-auto-flow: column;
  column-gap: 56px;
  align-items: stretch;
}

.round-label {
  grid-row: 1;
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.match {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.match:not(.round-0)::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 25%;
  bottom: 25%;
  width: 2px;
  background: var(--border);
}

.match:not(.final)::after {
  content: "";
  position: absolute;
  right: -28px;
  top: 50%;
  width: 28px;
  height: 2px;
  background: var(--border);
}

.slot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  min-height: 36px;
}

.slot.clickable { cursor: pointer; }
.slot.clickable:hover { border-color: var(--accent); }
.slot.bye { color: var(--muted); font-style: italic; }
.slot.winner { border-color: var(--win); color: var(--win); font-weight: 600; }
.slot.empty { color: var(--muted); }

.slot .seed {
  font-size: 0.7rem;
  color: var(--muted);
  min-width: 18px;
}

.champion-banner {
  max-width: 900px;
  margin: 24px auto 0;
  text-align: center;
  padding: 20px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(110,168,254,0.15), rgba(52,211,153,0.15));
  border: 1px solid var(--win);
  font-size: 1.2rem;
  font-weight: 700;
}