:root {
  --bg-base: #020617;
  --bg-elevated: rgba(15, 23, 42, 0.72);
  --bg-panel: rgba(15, 23, 42, 0.58);
  --bg-panel-strong: rgba(15, 23, 42, 0.88);
  --border: rgba(148, 163, 184, 0.14);
  --border-bright: rgba(56, 189, 248, 0.35);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --title: #f8fafc;
  --primary: #38bdf8;
  --secondary: #8b5cf6;
  --success: #22c55e;
  --error: #ef4444;
  --gold: #fbbf24;
  --silver: #cbd5e1;
  --bronze: #fb923c;
  --shadow-lg: 0 24px 80px rgba(2, 6, 23, 0.55);
  --shadow-glow: 0 0 0 1px rgba(56, 189, 248, 0.08), 0 0 48px rgba(56, 189, 248, 0.14);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --transition: 0.36s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  position: relative;
  overflow-x: hidden;
  color: var(--text);
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(139, 92, 246, 0.14), transparent 30%),
    linear-gradient(160deg, #020617 0%, #081121 42%, #0f172a 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 90%);
  pointer-events: none;
  opacity: 0.5;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.page-shell {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
  padding: 40px 0 56px;
  position: relative;
  z-index: 2;
}

.background-grid,
.background-glow,
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.background-grid {
  background:
    linear-gradient(transparent 0%, rgba(56, 189, 248, 0.03) 100%),
    repeating-linear-gradient(90deg, transparent 0 119px, rgba(56, 189, 248, 0.03) 119px 120px),
    repeating-linear-gradient(0deg, transparent 0 119px, rgba(139, 92, 246, 0.03) 119px 120px);
  opacity: 0.65;
}

.background-glow {
  filter: blur(70px);
  opacity: 0.45;
  --glow-start-x: -18%;
  --glow-start-y: -8%;
  --glow-mid-x: -10%;
  --glow-mid-y: 4%;
}

.background-glow-one {
  background: radial-gradient(circle, rgba(56, 189, 248, 0.35), transparent 62%);
  --glow-start-x: -18%;
  --glow-start-y: -8%;
  --glow-mid-x: -10%;
  --glow-mid-y: 4%;
  animation: floatGlow 14s ease-in-out infinite;
}

.background-glow-two {
  background: radial-gradient(circle, rgba(139, 92, 246, 0.32), transparent 60%);
  --glow-start-x: 52%;
  --glow-start-y: 12%;
  --glow-mid-x: 44%;
  --glow-mid-y: 20%;
  animation: floatGlow 18s ease-in-out infinite reverse;
}

.particles {
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 999px;
  background: rgba(226, 232, 240, 0.48);
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.8);
  animation: particleRise linear infinite;
}

.glass-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.76), rgba(15, 23, 42, 0.56));
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.glow-panel::after,
.round-card::after,
.leaderboard-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(125deg, rgba(56, 189, 248, 0.14), transparent 40%, rgba(139, 92, 246, 0.14));
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.glow-panel:hover::after,
.round-card:hover::after,
.leaderboard-card:hover::after {
  opacity: 1;
}

.eyebrow,
.panel-kicker,
.round-kicker,
.summary-label,
.metric-label,
.rank-label,
.score-label,
.stat-label,
.input-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero-title,
.topbar h1,
.leaderboard-header h1 {
  margin: 0;
  color: var(--title);
  line-height: 0.95;
}

.hero-title {
  font-size: clamp(3rem, 7vw, 5.8rem);
  text-shadow: 0 0 28px rgba(56, 189, 248, 0.26);
}

.hero-copy,
.topbar-subtitle,
.panel-header p,
.leader-meta,
.status-toast,
.error-banner {
  color: var(--text-muted);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  align-items: center;
  gap: 32px;
}

.hero-panel,
.auth-card {
  border-radius: var(--radius-lg);
  padding: 40px;
}

.hero-panel {
  min-height: 520px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.metric-chip {
  min-width: 150px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.12);
  background: rgba(2, 6, 23, 0.36);
}

.metric-chip strong {
  display: block;
  margin-top: 8px;
  font-size: 1rem;
  color: var(--title);
}

.auth-card {
  max-width: 460px;
  width: 100%;
  justify-self: end;
}

.panel-header h2 {
  margin: 10px 0 8px;
  font-size: 2.1rem;
}

.auth-form,
.round-form {
  display: grid;
  gap: 18px;
}

.stacked-actions {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.round-actions {
  margin-top: 16px;
}

.round-actions > * {
  width: 100%;
}

.input-group {
  display: grid;
  gap: 10px;
  position: relative;
}

.input-group input {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(2, 6, 23, 0.65);
  color: var(--text);
  padding: 16px 18px;
  border-radius: 16px;
  outline: none;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.input-group input::placeholder {
  color: rgba(148, 163, 184, 0.64);
}

.input-group input:focus {
  transform: translateY(-1px);
  border-color: rgba(56, 189, 248, 0.72);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.12), 0 0 28px rgba(56, 189, 248, 0.16);
  background: rgba(15, 23, 42, 0.82);
}

.input-outline {
  position: absolute;
  inset: auto 0 0;
  height: 100%;
  border-radius: 16px;
  border: 1px solid transparent;
  opacity: 0;
  transition: opacity var(--transition), border-color var(--transition);
  pointer-events: none;
}

.input-group:focus-within .input-outline {
  opacity: 1;
  border-color: rgba(139, 92, 246, 0.34);
}

.button-primary,
.button-secondary,
.button-ghost,
.button-disabled {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 16px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), opacity var(--transition);
  position: relative;
  overflow: hidden;
}

.button-primary {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.95), rgba(139, 92, 246, 0.9));
  color: #eff6ff;
  box-shadow: 0 12px 32px rgba(56, 189, 248, 0.26);
}

.button-secondary {
  background: rgba(56, 189, 248, 0.1);
  color: var(--title);
  border-color: rgba(56, 189, 248, 0.24);
}

.button-disabled {
  width: 100%;
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-muted);
  border-color: rgba(148, 163, 184, 0.16);
  cursor: not-allowed;
}

.button-ghost {
  background: rgba(15, 23, 42, 0.54);
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.14);
}

.button-primary:hover,
.button-secondary:hover,
.button-ghost:hover,
.round-card:hover {
  transform: translateY(-3px);
}

.button-primary:hover {
  box-shadow: 0 18px 36px rgba(56, 189, 248, 0.32);
}

.button-secondary:hover,
.button-ghost:hover {
  border-color: rgba(56, 189, 248, 0.38);
  box-shadow: 0 18px 30px rgba(2, 6, 23, 0.3);
}

.button-primary:disabled,
.button-disabled,
.round-form button:disabled,
.round-form input:disabled {
  opacity: 0.5;
  transform: none;
  box-shadow: none;
}

.error-banner,
.status-toast {
  min-height: 26px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition);
}

.error-banner.visible,
.status-toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.error-banner.visible {
  color: #fecaca;
}

.status-toast {
  margin: 20px 0 0;
  padding: 14px 18px;
  border-radius: 16px;
  border: 1px solid rgba(56, 189, 248, 0.18);
  background: rgba(15, 23, 42, 0.64);
}

.dashboard-shell,
.leaderboard-shell {
  display: grid;
  gap: 24px;
}

.topbar,
.leaderboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 30px;
  border-radius: var(--radius-lg);
}

.topbar h1,
.leaderboard-header h1 {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.dashboard-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.summary-card {
  padding: 22px 24px;
  border-radius: var(--radius-md);
}

.summary-card strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--title);
}

.round-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.round-card,
.leaderboard-card {
  border-radius: var(--radius-lg);
  transform: translateY(22px);
  opacity: 0;
  animation: staggerIn 0.72s ease forwards;
  animation-delay: calc(var(--stagger) * 90ms);
}

.round-card {
  padding: 26px;
}

.card-noise {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.06) 0.8px, transparent 0.8px);
  background-size: 18px 18px;
  opacity: 0.08;
  pointer-events: none;
}

.round-card.locked {
  filter: saturate(0.72);
}

.round-card.locked .round-form input,
.round-card.locked .round-form button {
  filter: blur(0.1px);
}

.round-card.locked::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.22);
  backdrop-filter: blur(1px);
}

.round-card.completed {
  border-color: rgba(34, 197, 94, 0.25);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(34, 197, 94, 0.1), 0 0 44px rgba(34, 197, 94, 0.16);
}

.round-card-header,
.leader-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.round-card-header h2,
.leader-heading h2 {
  margin: 8px 0 0;
  font-size: 1.7rem;
  color: var(--title);
}

.status-pill,
.leader-chip {
  padding: 8px 12px;
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.status-pill.unlocked,
.leader-chip {
  color: #c4f1ff;
  background: rgba(56, 189, 248, 0.14);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.status-pill.completed {
  color: #bbf7d0;
  background: rgba(34, 197, 94, 0.14);
  border: 1px solid rgba(34, 197, 94, 0.22);
}

.status-pill.locked {
  color: #cbd5e1;
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.16);
}

.round-stats,
.leader-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 22px 0;
}

.round-stats > div {
  flex: 1 1 140px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(2, 6, 23, 0.4);
  border: 1px solid rgba(148, 163, 184, 0.08);
}

.round-stats strong {
  display: block;
  margin-top: 8px;
  font-size: 1.7rem;
}

.admin-stat-copy {
  font-size: 1.2rem;
}

.admin-note {
  margin: 0 0 18px;
  color: var(--text-muted);
}

.admin-actions-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.admin-warning {
  border-color: rgba(251, 191, 36, 0.26);
  color: #fde68a;
  background: rgba(120, 53, 15, 0.24);
}

.leaderboard-list {
  display: grid;
  gap: 16px;
}

.leaderboard-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 24px 26px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.leaderboard-card:hover {
  transform: translateY(-4px) scale(1.01);
}

.leader-rank strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(2.1rem, 5vw, 3.25rem);
  line-height: 0.9;
  color: var(--title);
}

.leader-meta {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.88rem;
  margin: 10px 0 16px;
}

.progress-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
  overflow: hidden;
  position: relative;
}

.progress-bar {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.35);
  transition: width 0.8s ease;
}

.leader-score {
  text-align: right;
}

.leader-score strong {
  display: block;
  margin-top: 8px;
  font-size: 1.8rem;
  color: var(--title);
}

.top-gold {
  border-color: rgba(251, 191, 36, 0.32);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(251, 191, 36, 0.08), 0 0 52px rgba(251, 191, 36, 0.18);
}

.top-silver {
  border-color: rgba(203, 213, 225, 0.26);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(203, 213, 225, 0.08), 0 0 48px rgba(203, 213, 225, 0.12);
}

.top-bronze {
  border-color: rgba(251, 146, 60, 0.28);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(251, 146, 60, 0.08), 0 0 46px rgba(251, 146, 60, 0.14);
}

.leaderboard-card.refreshing {
  animation: leaderboardPulse 0.8s ease;
}

.ripple {
  position: absolute;
  border-radius: 999px;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.32);
  animation: ripple 0.75s ease-out forwards;
  pointer-events: none;
}

@keyframes floatGlow {
  0%, 100% { transform: translate(var(--glow-start-x), var(--glow-start-y)) scale(1); }
  50% { transform: translate(var(--glow-mid-x), var(--glow-mid-y)) scale(1.08); }
}

@keyframes particleRise {
  from {
    transform: translateY(100vh) scale(0.5);
    opacity: 0;
  }
  15% {
    opacity: 0.9;
  }
  to {
    transform: translateY(-10vh) scale(1.1);
    opacity: 0;
  }
}

@keyframes staggerIn {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes ripple {
  from {
    width: 0;
    height: 0;
    opacity: 0.45;
  }
  to {
    width: 280px;
    height: 280px;
    opacity: 0;
  }
}

@keyframes leaderboardPulse {
  0%,
  100% {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
  }
  50% {
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(56, 189, 248, 0.16), 0 0 54px rgba(56, 189, 248, 0.2);
  }
}

@media (max-width: 980px) {
  .login-shell,
  .round-grid,
  .dashboard-summary {
    grid-template-columns: 1fr;
  }

  .auth-card {
    justify-self: stretch;
    max-width: none;
  }

  .topbar,
  .leaderboard-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .leaderboard-card {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }

  .leader-score {
    text-align: left;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 28px, 1000px);
    padding: 20px 0 36px;
  }

  .hero-panel,
  .auth-card,
  .topbar,
  .leaderboard-header,
  .round-card,
  .leaderboard-card {
    padding: 22px;
  }

  .hero-title {
    font-size: 2.8rem;
  }

  .topbar-actions {
    width: 100%;
  }

  .topbar-actions a {
    flex: 1 1 180px;
  }

  .admin-actions-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}