/* ============================================================
   style.css
   Design tokens → reset → layout → components → utilities
   ============================================================ */

/* ── Tokens ────────────────────────────────────────────────── */
:root {
  --bg:          #0B1020;
  --surface:     #131929;
  --card:        #18223A;
  --card-hover:  #1E2C47;
  --border:      #30446D;
  --border-sub:  #243252;
  --primary:     #4F9DFF;
  --primary-dim: rgba(79, 157, 255, 0.15);
  --winner:      #20C997;
  --winner-dim:  rgba(32, 201, 151, 0.15);
  --danger:      #FF5C5C;
  --text:        #FFFFFF;
  --text-sec:    #A8B3C5;
  --text-mute:   #4E607F;
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --shadow-card: 0 2px 12px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 0 2px rgba(79, 157, 255, 0.35);
  --transition:  150ms cubic-bezier(0.4, 0, 0.2, 1);
  --font:        'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Layout — keep in sync with bracket.js constants */
  --card-w:      180px;
  --connector-w: 52px;
  --team-h:      46px;   /* TEAM_H in bracket.js */
  --divider-h:   1px;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Page Shell ────────────────────────────────────────────── */
.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Header ────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 16, 32, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-sub);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-badge {
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.brand-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand-sub {
  font-size: 12px;
  color: var(--text-sec);
  font-weight: 400;
}

/* ── Toolbar ───────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn:active { transform: scale(0.97); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-sec);
}
.btn-ghost:hover {
  background: var(--card-hover);
  border-color: var(--primary);
  color: var(--text);
}

.btn-primary {
  background: var(--primary-dim);
  border-color: var(--primary);
  color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary);
  color: #fff;
}

.btn-danger {
  background: transparent;
  border-color: var(--border);
  color: var(--text-mute);
}
.btn-danger:hover {
  background: rgba(255, 92, 92, 0.12);
  border-color: var(--danger);
  color: var(--danger);
}

.btn-icon { font-size: 14px; }

/* ── Legend chip ───────────────────────────────────────────── */
.header-legend {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-sec);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-dot.winner  { background: var(--winner); }
.legend-dot.primary { background: var(--primary); }

/* ── Bracket scroll wrapper ────────────────────────────────── */
.bracket-scroll {
  flex: 1;
  overflow-x: auto;
  overflow-y: auto;
  padding: 32px 24px 48px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.bracket-scroll::-webkit-scrollbar { height: 6px; width: 6px; }
.bracket-scroll::-webkit-scrollbar-track { background: transparent; }
.bracket-scroll::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

/* ── Bracket Root ──────────────────────────────────────────── */
#bracket-root {
  display: flex;
  flex-direction: column;
  gap: 32px;
  min-width: max-content;
  padding: 30px;
}

/* ── Main bracket (horizontal columns) ────────────────────── */
.bracket-main {
  display: flex;
  align-items: stretch;   /* connector cols stretch to tallest column */
  gap: 0;
}

/* ── Round Column ──────────────────────────────────────────── */
.round-column {
  display: flex;
  flex-direction: column;
  width: var(--card-w);
  flex-shrink: 0;
  /* Height is driven by the tallest column (R32).
     Other columns naturally align via the mathematical padding. */
}

.round-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-mute);
  padding: 0 4px 12px;
  text-align: center;
}

.matches-wrapper {
  display: flex;
  flex-direction: column;
  /* No gap here — spacing is applied per .match-item by bracket.js
     so every card aligns perfectly with its feeder pair */
}

/* Wrapper for a single match card inside a column */
.match-item {
  flex-shrink: 0;
}

/* ── Match Card ────────────────────────────────────────────── */
.match-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.match-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-card), 0 0 0 1px var(--primary-dim);
}

/* ── Team Row ──────────────────────────────────────────────── */
.team-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  height: var(--team-h);
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
  position: relative;
}

.team-row:hover:not(.team-empty) {
  background: var(--card-hover);
}

.team-row:focus-visible {
  outline: none;
  box-shadow: inset var(--shadow-glow);
}

.team-empty {
  cursor: default;
  opacity: 0.45;
}

.team-flag {
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

.team-name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
}

.team-empty .team-name {
  color: var(--text-mute);
  font-style: italic;
  font-weight: 400;
}

/* Winner state */
.team-winner {
  background: var(--winner-dim);
}

.team-winner .team-name {
  color: var(--winner);
  font-weight: 600;
}

.team-winner:hover {
  background: rgba(32, 201, 151, 0.22);
}

.winner-check {
  font-size: 11px;
  color: var(--winner);
  opacity: 0;
  flex-shrink: 0;
  font-weight: 700;
  transition: opacity var(--transition);
}

.team-winner .winner-check {
  opacity: 1;
}

/* Divider between team rows */
.match-divider {
  height: var(--divider-h);
  background: var(--border-sub);
  margin: 0;
}

/* ── Drag states ───────────────────────────────────────────── */
.team-row.dragging {
  opacity: 0.35;
}

.team-row.drop-target {
  background: var(--primary-dim);
  outline: 2px dashed var(--primary);
  outline-offset: -2px;
}

.team-row[draggable="true"] {
  cursor: grab;
}

.team-row[draggable="true"]:active {
  cursor: grabbing;
}

/* ── Connector Column ──────────────────────────────────────── */
.connector-col {
  width: var(--connector-w);
  flex-shrink: 0;
  position: relative;
  align-self: stretch;
}

.connector-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* ── Third Place ───────────────────────────────────────────── */
.third-place-section {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  /* Offset: 4 round columns + 4 connector gaps to sit under SF area */
  padding-left: calc((var(--card-w) + var(--connector-w)) * 3 + var(--card-w) / 2);
}

.third-label {
  color: var(--text-mute);
}

.third-place-section .match-card {
  border-color: var(--border-sub);
  opacity: 0.9;
}

/* ── Utility ───────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .site-header {
    padding: 0 12px;
    height: auto;
    flex-wrap: wrap;
    padding-top: 10px;
    padding-bottom: 10px;
    gap: 10px;
  }

  .header-legend { display: none; }

  .bracket-scroll { padding: 16px 12px 40px; }

  .btn { padding: 6px 10px; font-size: 12px; }
  .btn .btn-label { display: none; }
}

@media (max-width: 600px) {
  :root {
    --card-w:       160px;
    --connector-w:  36px;
    --team-h:       42px;
  }
  .team-flag { display: none; }
  .brand-sub { display: none; }
}

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0);   }
}

.match-card {
  animation: fadeInUp 200ms ease both;
}

@media (prefers-reduced-motion: reduce) {
  .match-card { animation: none; }
  * { transition: none !important; }
}