/*
 * arena.css
 * CyberHeroesHQ — School vs. School Cyber Challenge Arena
 * Ownership: CyberHeroesHQ frontend / public/css/
 *
 * Dark esports-style arena dashboard for competitive cybersecurity challenges.
 * Primary: electric purple #7c3aed | Accent: cyan #06b6d4 | BG: #0f0f1a
 * No external dependencies — pure CSS.
 */

/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  --arena-bg:          #0f0f1a;
  --arena-surface:     #16162a;
  --arena-card:        #1c1c35;
  --arena-card-hover:  #22223f;
  --arena-border:      #2a2a4a;
  --purple:            #7c3aed;
  --purple-light:      #9b59f5;
  --purple-dark:       #5b21b6;
  --purple-glow:       rgba(124, 58, 237, 0.35);
  --cyan:              #06b6d4;
  --cyan-light:        #22d3ee;
  --cyan-dark:         #0891b2;
  --cyan-glow:         rgba(6, 182, 212, 0.35);
  --gold:              #f59e0b;
  --gold-glow:         rgba(245, 158, 11, 0.3);
  --red:               #ef4444;
  --red-glow:          rgba(239, 68, 68, 0.3);
  --green:             #22c55e;
  --green-glow:        rgba(34, 197, 94, 0.3);
  --text-primary:      #f1f5f9;
  --text-secondary:    #94a3b8;
  --text-muted:        #64748b;
  --team-a:            #7c3aed;
  --team-b:            #06b6d4;
  --radius-sm:         6px;
  --radius-md:         12px;
  --radius-lg:         18px;
  --radius-xl:         24px;
  --transition:        all 0.2s ease;
  --transition-slow:   all 0.4s ease;
}

/* ============================================================
   GLOBAL ARENA RESETS
   ============================================================ */
.arena-page {
  background-color: var(--arena-bg);
  color: var(--text-primary);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  line-height: 1.6;
}

.arena-page *,
.arena-page *::before,
.arena-page *::after {
  box-sizing: border-box;
}

.arena-page a {
  color: var(--cyan);
  text-decoration: none;
  transition: var(--transition);
}

.arena-page a:hover {
  color: var(--cyan-light);
}

/* ============================================================
   ARENA HERO — TOP BANNER WITH ANIMATED GRADIENT BG
   ============================================================ */
.arena-hero {
  position: relative;
  padding: 72px 24px 60px;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0a0a18 0%, #1a0a35 30%, #0d1a35 60%, #0a1520 100%);
}

.arena-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 50%, rgba(124, 58, 237, 0.22) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 40%, rgba(6, 182, 212, 0.18) 0%, transparent 65%),
    radial-gradient(ellipse 40% 40% at 50% 100%, rgba(124, 58, 237, 0.12) 0%, transparent 60%);
  animation: arena-pulse 8s ease-in-out infinite alternate;
  pointer-events: none;
}

.arena-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(124, 58, 237, 0.06) 39px,
      rgba(124, 58, 237, 0.06) 40px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 39px,
      rgba(6, 182, 212, 0.04) 39px,
      rgba(6, 182, 212, 0.04) 40px
    );
  pointer-events: none;
}

@keyframes arena-pulse {
  0%   { opacity: 0.7; transform: scale(1); }
  50%  { opacity: 1;   transform: scale(1.03); }
  100% { opacity: 0.8; transform: scale(1.01); }
}

.arena-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
}

.arena-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid rgba(6, 182, 212, 0.4);
  border-radius: 100px;
  padding: 4px 16px;
  margin-bottom: 20px;
  background: rgba(6, 182, 212, 0.08);
}

.arena-hero h1 {
  font-size: clamp(38px, 7vw, 72px);
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.05;
  margin: 0 0 16px;
  background: linear-gradient(135deg, #fff 0%, var(--cyan-light) 40%, var(--purple-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  /* Fallback for browsers without background-clip: text support */
  color: var(--cyan-light);
}

@supports not (background-clip: text) {
  .arena-hero h1 {
    background: transparent;
    color: var(--cyan-light);
  }
}

@media (max-width: 767px) {
  .arena-hero h1 {
    background: transparent;
    -webkit-text-fill-color: var(--cyan-light);
    color: var(--cyan-light);
  }
}

.arena-hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
}

.arena-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.5);
  border-radius: 100px;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 700;
  color: #f87171;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.arena-live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ef4444;
  animation: live-blink 1.4s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes live-blink {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6); }
  50%       { opacity: 0.5; box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
}

/* ============================================================
   ARENA NAV — STATE/DIVISION FILTER TABS
   ============================================================ */
.arena-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 24px;
  background: var(--arena-surface);
  border-bottom: 1px solid var(--arena-border);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.arena-nav::-webkit-scrollbar {
  display: none;
}

.arena-nav-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
  margin-right: 4px;
}

.arena-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 100px;
  border: 1px solid var(--arena-border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  user-select: none;
}

.arena-tab:hover {
  border-color: var(--purple);
  color: var(--purple-light);
  background: rgba(124, 58, 237, 0.08);
}

.arena-tab.active {
  background: var(--purple);
  border-color: var(--purple);
  color: #fff;
  box-shadow: 0 0 16px var(--purple-glow);
}

.arena-tab-count {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 100px;
  padding: 1px 7px;
  font-size: 11px;
  font-weight: 700;
}

/* ============================================================
   ARENA GRID — 3-COLUMN MAIN LAYOUT
   ============================================================ */
.arena-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.arena-grid {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 24px;
  align-items: start;
}

.arena-col-left,
.arena-col-right {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.arena-col-center {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.arena-section-title {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.arena-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--arena-border);
}

/* ============================================================
   CHALLENGE CARD — ACTIVE MATCH WITH TEAM A vs B LAYOUT
   ============================================================ */
.challenge-card {
  background: var(--arena-card);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-slow);
  position: relative;
}

.challenge-card:hover {
  border-color: var(--purple);
  box-shadow: 0 0 32px var(--purple-glow), 0 8px 32px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

.challenge-card.featured {
  border-color: var(--purple);
  box-shadow: 0 0 24px var(--purple-glow);
}

.challenge-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(124, 58, 237, 0.12);
  border-bottom: 1px solid var(--arena-border);
}

.challenge-category {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--purple-light);
}

.challenge-status {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
}

.challenge-status.live {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.challenge-status.upcoming {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.challenge-status.completed {
  background: rgba(34, 197, 94, 0.15);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.challenge-vs {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0;
  padding: 28px 20px;
}

.challenge-team {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.challenge-team.team-a .team-name {
  color: var(--purple-light);
}

.challenge-team.team-b .team-name {
  color: var(--cyan-light);
}

.team-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid transparent;
}

.team-a .team-avatar {
  background: rgba(124, 58, 237, 0.2);
  border-color: var(--purple);
  box-shadow: 0 0 16px var(--purple-glow);
}

.team-b .team-avatar {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--cyan);
  box-shadow: 0 0 16px var(--cyan-glow);
}

.team-name {
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
  max-width: 120px;
}

.team-location {
  font-size: 11px;
  color: var(--text-muted);
}

.challenge-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 16px;
}

.vs-text {
  font-size: 22px;
  font-weight: 900;
  color: var(--text-muted);
  letter-spacing: 2px;
}

.challenge-score-display {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 32px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.score-a {
  color: var(--purple-light);
  text-shadow: 0 0 20px var(--purple-glow);
}

.score-sep {
  color: var(--arena-border);
  font-size: 24px;
}

.score-b {
  color: var(--cyan-light);
  text-shadow: 0 0 20px var(--cyan-glow);
}

.challenge-card-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--arena-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.2);
}

.challenge-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
}

.challenge-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ============================================================
   CHALLENGE BUTTON — CALL TO ACTION
   ============================================================ */
.challenge-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  user-select: none;
  white-space: nowrap;
}

.challenge-btn.primary {
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: #fff;
  box-shadow: 0 4px 16px var(--purple-glow);
}

.challenge-btn.primary:hover {
  background: linear-gradient(135deg, var(--purple-light), var(--purple));
  box-shadow: 0 6px 24px rgba(124, 58, 237, 0.5);
  transform: translateY(-1px);
  color: #fff;
}

.challenge-btn.secondary {
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--cyan);
}

.challenge-btn.secondary:hover {
  background: rgba(6, 182, 212, 0.1);
  box-shadow: 0 0 16px var(--cyan-glow);
  color: var(--cyan-light);
}

.challenge-btn.ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid var(--arena-border);
}

.challenge-btn.ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.challenge-btn.sm {
  padding: 6px 14px;
  font-size: 12px;
}

/* ============================================================
   SCORE TICKER — LIVE SCORE DISPLAY WITH TEAM COLORS
   ============================================================ */
.score-ticker {
  background: var(--arena-card);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.score-ticker-header {
  padding: 12px 16px;
  background: rgba(6, 182, 212, 0.08);
  border-bottom: 1px solid var(--arena-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.score-ticker-title {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan);
}

.ticker-update {
  font-size: 10px;
  color: var(--text-muted);
}

.score-ticker-row {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(42, 42, 74, 0.6);
  transition: var(--transition);
  gap: 12px;
}

.score-ticker-row:last-child {
  border-bottom: none;
}

.score-ticker-row:hover {
  background: rgba(124, 58, 237, 0.06);
}

.ticker-rank {
  font-size: 12px;
  font-weight: 800;
  color: var(--text-muted);
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.ticker-rank.gold   { color: var(--gold); }
.ticker-rank.silver { color: #94a3b8; }
.ticker-rank.bronze { color: #cd7c40; }

.ticker-school {
  flex: 1;
  min-width: 0;
}

.ticker-school-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ticker-school-loc {
  font-size: 11px;
  color: var(--text-muted);
}

.ticker-pts {
  font-size: 15px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-light);
  text-shadow: 0 0 10px var(--cyan-glow);
  flex-shrink: 0;
}

.ticker-delta {
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  padding: 2px 6px;
  border-radius: 4px;
}

.ticker-delta.up {
  color: var(--green);
  background: rgba(34, 197, 94, 0.12);
}

.ticker-delta.down {
  color: var(--red);
  background: rgba(239, 68, 68, 0.12);
}

/* ============================================================
   COUNTDOWN TIMER
   ============================================================ */
.countdown-timer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 16px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-md);
  border: 1px solid var(--arena-border);
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 52px;
}

.countdown-value {
  font-size: 30px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  background: var(--arena-card);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  line-height: 1;
  min-width: 52px;
  text-align: center;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

.countdown-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.countdown-sep {
  font-size: 24px;
  font-weight: 900;
  color: var(--purple);
  margin-bottom: 14px;
  text-shadow: 0 0 10px var(--purple-glow);
}

/* ============================================================
   ELO BADGE — RATING CHIP
   ============================================================ */
.elo-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px 4px 8px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.5px;
  border: 1px solid transparent;
  user-select: none;
}

.elo-icon {
  font-size: 13px;
}

.elo-badge.bronze {
  background: rgba(205, 124, 64, 0.15);
  border-color: rgba(205, 124, 64, 0.4);
  color: #cd7c40;
}

.elo-badge.silver {
  background: rgba(148, 163, 184, 0.15);
  border-color: rgba(148, 163, 184, 0.4);
  color: #94a3b8;
}

.elo-badge.gold {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.4);
  color: var(--gold);
  box-shadow: 0 0 10px var(--gold-glow);
}

.elo-badge.platinum {
  background: rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.5);
  color: var(--cyan-light);
  box-shadow: 0 0 12px var(--cyan-glow);
}

.elo-badge.diamond {
  background: rgba(124, 58, 237, 0.18);
  border-color: var(--purple);
  color: var(--purple-light);
  box-shadow: 0 0 14px var(--purple-glow);
}

.elo-badge.champion {
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.25), rgba(6, 182, 212, 0.2));
  border-color: var(--cyan);
  color: var(--cyan-light);
  box-shadow: 0 0 18px var(--cyan-glow), 0 0 30px var(--purple-glow);
  animation: champion-pulse 2.5s ease-in-out infinite;
}

@keyframes champion-pulse {
  0%, 100% { box-shadow: 0 0 18px var(--cyan-glow), 0 0 30px var(--purple-glow); }
  50%       { box-shadow: 0 0 28px var(--cyan-glow), 0 0 48px var(--purple-glow); }
}

/* ============================================================
   NATIONAL LEADERBOARD TABLE
   ============================================================ */
.leaderboard-table {
  background: var(--arena-card);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.leaderboard-table-header {
  padding: 16px 20px;
  background: rgba(124, 58, 237, 0.1);
  border-bottom: 1px solid var(--arena-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.leaderboard-table-title {
  font-size: 14px;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.leaderboard-filter {
  font-size: 12px;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  color: var(--text-secondary);
  cursor: pointer;
}

table.lb-table {
  width: 100%;
  border-collapse: collapse;
}

table.lb-table thead th {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--arena-border);
  background: rgba(0, 0, 0, 0.2);
}

table.lb-table thead th:last-child {
  text-align: right;
}

table.lb-table tbody tr {
  border-bottom: 1px solid rgba(42, 42, 74, 0.5);
  transition: var(--transition);
}

table.lb-table tbody tr:last-child {
  border-bottom: none;
}

table.lb-table tbody tr:hover {
  background: rgba(124, 58, 237, 0.07);
}

table.lb-table tbody tr.highlighted {
  background: rgba(6, 182, 212, 0.07);
  border-color: rgba(6, 182, 212, 0.2);
}

table.lb-table tbody td {
  padding: 13px 16px;
  font-size: 13px;
  color: var(--text-primary);
  vertical-align: middle;
}

table.lb-table tbody td:last-child {
  text-align: right;
}

.lb-rank-cell {
  font-size: 14px;
  font-weight: 900;
  color: var(--text-muted);
  width: 48px;
}

.lb-rank-cell.rank-1 { color: var(--gold); }
.lb-rank-cell.rank-2 { color: #94a3b8; }
.lb-rank-cell.rank-3 { color: #cd7c40; }

.lb-school-cell {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.lb-school-name {
  font-weight: 700;
  color: var(--text-primary);
}

.lb-school-loc {
  font-size: 11px;
  color: var(--text-muted);
}

.lb-pts-cell {
  font-size: 15px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-light);
}

.lb-wins-cell {
  font-size: 13px;
  color: var(--green);
  font-weight: 700;
}

.lb-streak-cell {
  font-size: 12px;
  color: var(--gold);
  font-weight: 700;
}

/* ============================================================
   CTF SECTION — CAPTURE THE FLAG EVENT
   ============================================================ */
.ctf-section {
  background: var(--arena-card);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.ctf-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--purple), var(--cyan), var(--purple));
  background-size: 200% 100%;
  animation: ctf-stripe 3s linear infinite;
}

@keyframes ctf-stripe {
  0%   { background-position: 0% 0%; }
  100% { background-position: 200% 0%; }
}

.ctf-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--arena-border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.ctf-event-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 4px;
  line-height: 1.3;
}

.ctf-event-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ctf-prizes {
  text-align: right;
  flex-shrink: 0;
}

.ctf-prize-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.ctf-prize-value {
  font-size: 20px;
  font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 12px var(--gold-glow);
}

.ctf-flags-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  padding: 20px 24px;
}

/* ============================================================
   FLAG CARD — INDIVIDUAL CTF FLAG
   ============================================================ */
.flag-card {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.flag-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--arena-border);
  transition: var(--transition);
}

.flag-card:hover {
  border-color: var(--purple);
  background: rgba(124, 58, 237, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.flag-card:hover::before {
  background: var(--purple);
}

.flag-card.captured {
  border-color: rgba(34, 197, 94, 0.4);
  background: rgba(34, 197, 94, 0.05);
}

.flag-card.captured::before {
  background: var(--green);
}

.flag-card.locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.flag-card.locked:hover {
  transform: none;
  border-color: var(--arena-border);
  background: rgba(0, 0, 0, 0.3);
  box-shadow: none;
}

.flag-icon {
  font-size: 26px;
  margin-bottom: 10px;
  display: block;
}

.flag-name {
  font-size: 13px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.3;
}

.flag-category {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--purple-light);
  margin-bottom: 8px;
}

.flag-points {
  font-size: 18px;
  font-weight: 900;
  color: var(--cyan);
  margin-bottom: 6px;
}

.flag-solves {
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.flag-badge-captured {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  font-size: 11px;
  font-weight: 700;
  color: var(--green);
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 100px;
  padding: 3px 10px;
}

.ctf-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--arena-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.15);
}

/* ============================================================
   RESULTS FEED — RECENT COMPLETED MATCHES
   ============================================================ */
.results-feed {
  background: var(--arena-card);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.results-feed-header {
  padding: 14px 16px;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--arena-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.results-feed-title {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.result-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(42, 42, 74, 0.4);
  transition: var(--transition);
}

.result-item:last-child {
  border-bottom: none;
}

.result-item:hover {
  background: rgba(124, 58, 237, 0.06);
}

.result-match-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.result-schools {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-score {
  font-size: 13px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--cyan-light);
  flex-shrink: 0;
}

.result-meta {
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.result-winner-tag {
  font-size: 10px;
  font-weight: 700;
  color: var(--green);
  background: rgba(34, 197, 94, 0.12);
  border-radius: 4px;
  padding: 1px 6px;
}

/* ============================================================
   NO CHALLENGES — EMPTY STATE
   ============================================================ */
.no-challenges {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 32px;
  background: var(--arena-card);
  border: 1px dashed var(--arena-border);
  border-radius: var(--radius-lg);
  gap: 14px;
}

.no-challenges-icon {
  font-size: 52px;
  opacity: 0.5;
}

.no-challenges-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-secondary);
  margin: 0;
}

.no-challenges-sub {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 340px;
  margin: 0;
  line-height: 1.6;
}

/* ============================================================
   UTILITY / MISC
   ============================================================ */
.arena-divider {
  height: 1px;
  background: var(--arena-border);
  margin: 24px 0;
}

.arena-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: var(--purple-light);
}

.arena-stat-pill {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 18px;
  background: var(--arena-card);
  border: 1px solid var(--arena-border);
  border-radius: var(--radius-md);
}

.stat-pill-value {
  font-size: 22px;
  font-weight: 900;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.stat-pill-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 2px;
}

.glow-purple { box-shadow: 0 0 20px var(--purple-glow); }
.glow-cyan   { box-shadow: 0 0 20px var(--cyan-glow); }
.glow-gold   { box-shadow: 0 0 20px var(--gold-glow); }

/* ============================================================
   RESPONSIVE — 768px TABLET BREAKPOINT
   ============================================================ */
@media (max-width: 768px) {
  .arena-hero {
    padding: 48px 20px 40px;
  }

  .arena-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .arena-col-left,
  .arena-col-right {
    order: 2;
  }

  .arena-col-center {
    order: 1;
  }

  .challenge-vs {
    grid-template-columns: 1fr auto 1fr;
    padding: 20px 14px;
    gap: 0;
  }

  .team-name {
    font-size: 12px;
    max-width: 90px;
  }

  .team-avatar {
    width: 48px;
    height: 48px;
    font-size: 22px;
  }

  .challenge-score-display {
    font-size: 26px;
    gap: 8px;
  }

  .ctf-flags-grid {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
  }

  .ctf-header {
    flex-direction: column;
    gap: 12px;
  }

  .ctf-prizes {
    text-align: left;
  }

  table.lb-table tbody td {
    padding: 11px 10px;
    font-size: 12px;
  }

  table.lb-table thead th {
    padding: 8px 10px;
    font-size: 9px;
  }

  .countdown-value {
    font-size: 22px;
    padding: 6px 10px;
    min-width: 40px;
  }

  .arena-container {
    padding: 20px 16px 48px;
  }
}

/* ============================================================
   RESPONSIVE — 480px MOBILE BREAKPOINT
   ============================================================ */
@media (max-width: 480px) {
  .arena-hero {
    padding: 36px 16px 32px;
  }

  .arena-hero-sub {
    font-size: 15px;
  }

  .arena-nav {
    padding: 12px 16px;
    gap: 6px;
  }

  .arena-tab {
    padding: 6px 12px;
    font-size: 12px;
  }

  .challenge-card-header {
    padding: 10px 14px;
  }

  .challenge-vs {
    padding: 16px 10px;
  }

  .team-avatar {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .team-name {
    font-size: 11px;
    max-width: 76px;
  }

  .challenge-score-display {
    font-size: 22px;
    gap: 6px;
  }

  .challenge-card-footer {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
    padding: 12px 14px;
  }

  .challenge-btn {
    width: 100%;
    justify-content: center;
    padding: 12px 16px;
    font-size: 14px;
    min-height: 44px;
  }

  .ctf-flags-grid {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 14px;
  }

  .ctf-footer {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
    padding: 14px 16px;
  }

  .leaderboard-table-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
  }

  .leaderboard-filter {
    width: 100%;
  }

  table.lb-table thead th,
  table.lb-table tbody td {
    padding: 10px 8px;
  }

  .countdown-timer {
    gap: 4px;
    padding: 12px;
  }

  .countdown-unit {
    min-width: 40px;
  }

  .countdown-value {
    font-size: 18px;
    padding: 6px 8px;
    min-width: 36px;
  }

  .countdown-sep {
    font-size: 18px;
    margin-bottom: 12px;
  }

  .score-ticker-row {
    gap: 8px;
    padding: 10px 12px;
  }

  .no-challenges {
    padding: 40px 20px;
  }

  .arena-container {
    padding: 16px 14px 40px;
  }
}