:root {
  --bg: #07111f;
  --bg-soft: rgba(10, 18, 35, 0.82);
  --surface: rgba(255, 255, 255, 0.1);
  --surface-strong: rgba(255, 255, 255, 0.16);
  --line: rgba(255, 255, 255, 0.14);
  --text: #f4f7fb;
  --muted: #b7c4da;
  --cyan: #68e0ff;
  --aqua: #85ffd8;
  --orange: #ffb86b;
  --danger: #ff6b7d;
  --shadow: 0 24px 80px rgba(2, 12, 28, 0.45);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Manrope", sans-serif;
  background: var(--bg);
}

.page-bg {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(4, 12, 26, 0.25), rgba(4, 12, 26, 0.88)),
    radial-gradient(circle at top left, rgba(104, 224, 255, 0.3), transparent 35%),
    radial-gradient(circle at top right, rgba(133, 255, 216, 0.22), transparent 28%),
    url("/static/assets/backgrounds/arena.jpg") center/cover no-repeat;
  filter: saturate(1.1);
}

.app-shell {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding: 20px;
}

.hidden {
  display: none !important;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--aqua);
  font-weight: 800;
}

.muted {
  color: var(--muted);
}

.small-text {
  font-size: 0.9rem;
}

.auth-screen,
.app-screen {
  max-width: 1200px;
  margin: 0 auto;
}

.auth-card {
  min-height: calc(100vh - 40px);
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 38px;
  background: rgba(7, 17, 31, 0.6);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.auth-copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.04));
}

.auth-copy h1 {
  margin: 0 0 16px;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2.9rem, 6vw, 5.5rem);
}

.auth-tabs {
  display: flex;
  gap: 10px;
  align-self: start;
}

.tab-button,
.ghost-button,
.primary-button,
.secondary-button,
.switch-pill,
.nav-button {
  appearance: none;
  border: 0;
  cursor: pointer;
  color: var(--text);
  font-family: inherit;
}

.tab-button,
.ghost-button,
.switch-pill,
.nav-button {
  padding: 12px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid transparent;
}

.tab-button.active,
.switch-pill.active,
.nav-button.active {
  background: rgba(104, 224, 255, 0.16);
  border-color: rgba(104, 224, 255, 0.4);
}

.primary-button,
.secondary-button {
  border-radius: 20px;
  padding: 16px 18px;
  font-weight: 800;
}

.primary-button {
  background: linear-gradient(135deg, #55b8ff, #5dffca);
  color: #04111f;
}

.secondary-button {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.ghost-button.small,
.primary-button.compact {
  padding: 11px 14px;
  border-radius: 16px;
}

.auth-form {
  display: none;
  gap: 16px;
  padding: 26px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
}

.auth-form.active {
  display: grid;
}

label,
.field-label {
  display: grid;
  gap: 8px;
  font-weight: 700;
  color: var(--muted);
}

input,
select {
  width: 100%;
  padding: 15px 16px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(7, 17, 31, 0.45);
  color: var(--text);
  font-size: 1rem;
  appearance: none;
  -webkit-appearance: none;
  color-scheme: dark;
}

input:focus,
select:focus {
  outline: none;
  border-color: rgba(104, 224, 255, 0.52);
  box-shadow: 0 0 0 3px rgba(104, 224, 255, 0.12);
}

select option {
  color: var(--text);
  background: #0b1727;
}

.avatar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 12px;
}

.avatar-option {
  padding: 10px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  text-align: left;
}

.avatar-option.selected {
  outline: 2px solid rgba(104, 224, 255, 0.55);
  background: rgba(104, 224, 255, 0.12);
}

.avatar-option img {
  width: 100%;
  height: 98px;
  object-fit: cover;
  border-radius: 16px;
  display: block;
}

.avatar-meta {
  display: grid;
  gap: 2px;
  margin-top: 10px;
}

.avatar-meta strong {
  color: var(--text);
  font-size: 0.95rem;
}

.avatar-meta span {
  color: var(--muted);
  font-size: 0.84rem;
}

.demo-box {
  display: grid;
  gap: 6px;
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
}

.demo-users {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.demo-user-button {
  text-align: left;
  border-color: var(--line);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 4px 20px;
}

.topbar h2 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
}

.mobile-app {
  padding-bottom: 110px;
}

.screen {
  display: none;
}

.screen.active {
  display: grid;
  gap: 20px;
}

.hero-panel,
.panel,
.battle-room,
.profile-card,
.modal-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
  padding: 24px;
}

.hero-panel h3 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.04;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.hero-profile,
.panel,
.profile-card {
  padding: 20px;
}

.hero-profile-card {
  display: grid;
  gap: 14px;
}

.hero-profile-card img {
  width: 96px;
  height: 96px;
  border-radius: 24px;
  object-fit: cover;
}

.stats-row,
.summary-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.stat-card {
  padding: 14px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.stat-card span {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.stat-card strong {
  font-size: 1.15rem;
}

.content-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
}

.side-stack {
  display: grid;
  gap: 20px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.panel-head h4,
.profile-card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.battle-list,
.leaderboard-list,
.category-grid,
.admin-user-list,
.admin-crud-list {
  display: grid;
  gap: 12px;
}

.category-grid {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.category-card {
  padding: 14px;
  border-radius: 20px;
  min-height: 112px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
}

.battle-card,
.leaderboard-card,
.recent-card,
.admin-user-card,
.admin-crud-card {
  padding: 16px;
  border-radius: 22px;
  background: rgba(17, 26, 46, 0.84);
  border: 1px solid var(--line);
}

.battle-card-header,
.leader-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 800;
  background: rgba(133, 255, 216, 0.14);
  color: var(--aqua);
}

.badge.active {
  background: rgba(255, 184, 107, 0.18);
  color: var(--orange);
}

.battle-card-meta,
.battle-card-buttons,
.hero-copy .muted,
.player-meta,
.battle-room-layout,
.recent-list {
  display: grid;
  gap: 12px;
}

.battle-card-meta {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 8px;
}

.battle-card-buttons {
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  align-items: stretch;
  gap: 14px;
}

.battle-card-buttons .primary-button,
.battle-card-buttons .secondary-button {
  width: 100%;
}

.join-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}

.profile-edit-grid,
.form-grid {
  display: grid;
  gap: 12px;
}

.profile-edit-grid {
  grid-template-columns: 1.4fr 0.9fr auto;
  align-items: end;
}

.form-grid.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid.three-col {
  grid-template-columns: 1.2fr 0.9fr auto;
}

.admin-form {
  display: grid;
  gap: 14px;
  margin-bottom: 18px;
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
}

.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.inline-end {
  justify-content: flex-end;
  align-items: end;
}

.battle-room {
  padding: 24px;
}

.battle-room.empty-state {
  min-height: 300px;
  place-items: center;
  text-align: center;
}

.battle-room-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.battle-room-layout {
  grid-template-columns: 0.9fr 1.1fr;
}

.battle-side,
.arena-side {
  display: grid;
  gap: 14px;
}

.players-grid {
  display: grid;
  gap: 10px;
}

.player-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.player-stack {
  flex: 1;
  display: grid;
  gap: 8px;
}

.hp-row {
  display: grid;
  gap: 6px;
}

.hp-row span {
  font-size: 0.8rem;
  color: var(--muted);
}

.hp-track {
  height: 9px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.hp-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #ff6b7d, #ffb86b 52%, #85ffd8);
}

.player-card img,
.leaderboard-card img,
.profile-avatar {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  object-fit: cover;
}

.arena-card {
  padding: 18px;
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(104, 224, 255, 0.12), rgba(255, 255, 255, 0.05));
  border: 1px solid rgba(104, 224, 255, 0.2);
}

.arena-card h3 {
  margin: 0 0 8px;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1;
}

.arena-card .prompt {
  font-size: clamp(2rem, 8vw, 4.4rem);
  line-height: 1;
  font-family: "Space Grotesk", sans-serif;
  margin: 10px 0;
}

.hint {
  color: var(--aqua);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.answer-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 14px;
}

.event-feed {
  min-height: 120px;
  padding: 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  color: var(--muted);
}

.winner-spotlight {
  display: grid;
  place-items: center;
  gap: 10px;
  padding: 18px;
  text-align: center;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(104, 224, 255, 0.2), rgba(255, 184, 107, 0.2));
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.winner-spotlight img {
  width: 110px;
  height: 110px;
  border-radius: 32px;
  object-fit: cover;
  box-shadow: 0 18px 42px rgba(2, 12, 28, 0.4);
}

.winner-spotlight strong {
  font-size: 1.6rem;
}

.winner-word {
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: 0.18em;
}

.invite-list,
.invite-search-results {
  display: grid;
  gap: 12px;
}

.admin-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.admin-user-card,
.admin-crud-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
}

.admin-user-card img {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  object-fit: cover;
}

.admin-user-copy,
.leaderboard-copy {
  display: grid;
  gap: 4px;
}

.leaderboard-copy strong {
  font-size: 1.35rem;
}

.admin-card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.admin-user-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tiny-avatar {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  object-fit: cover;
}

.admin-avatar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.admin-avatar-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
}

.admin-avatar-card img {
  width: 100%;
  height: 140px;
  border-radius: 18px;
  object-fit: cover;
}

.invite-card,
.invite-search-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
}

.invite-search-item strong,
.invite-search-item .muted,
.modal-card h2,
.modal-card h3,
.modal-card p,
.modal-card label {
  color: var(--text);
}

.invite-card img,
.invite-search-item img {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  object-fit: cover;
}

.invite-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.leaderboard-switch {
  display: flex;
  gap: 12px;
}

.leaderboard-card {
  display: grid;
  grid-template-columns: auto 56px 1fr auto;
  align-items: center;
  gap: 14px;
  background: rgba(17, 26, 46, 0.94);
}

.leaderboard-card > :last-child {
  text-align: right;
}

.danger-button {
  color: #ffd8de;
  border-color: rgba(255, 107, 125, 0.28);
  background: rgba(255, 107, 125, 0.12);
}

.rank-pill {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.08);
}

.profile-card {
  display: grid;
  gap: 20px;
}

.profile-top {
  display: flex;
  align-items: center;
  gap: 18px;
}

.profile-avatar {
  width: 92px;
  height: 92px;
  border-radius: 28px;
}

.recent-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bottom-nav {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  width: min(760px, calc(100vw - 24px));
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: 10px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.88);
  backdrop-filter: blur(18px);
}

.nav-button {
  font-weight: 800;
  border-radius: 18px;
}

.modal {
  width: min(560px, calc(100vw - 24px));
  border: 0;
  background: transparent;
  padding: 0;
}

.modal::backdrop {
  background: rgba(3, 8, 18, 0.72);
}

.modal-card {
  display: grid;
  gap: 16px;
  padding: 24px;
  color: var(--text);
}

.modal-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.toast {
  position: fixed;
  top: 22px;
  right: 22px;
  min-width: 220px;
  max-width: 320px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(7, 17, 31, 0.9);
  border: 1px solid rgba(104, 224, 255, 0.24);
  box-shadow: var(--shadow);
}

.admin-page .auth-card {
  min-height: auto;
  max-width: 880px;
  margin: 20px auto 0;
  grid-template-columns: 0.95fr 0.85fr;
  padding: 18px;
}

.admin-page .auth-copy {
  min-height: 320px;
  padding: 24px;
}

.admin-page .auth-copy h1 {
  font-size: clamp(2.2rem, 4vw, 3.6rem);
}

.admin-page .auth-form {
  gap: 12px;
  padding: 20px;
  align-self: center;
}

.admin-page input,
.admin-page select {
  padding: 13px 14px;
}

.admin-page .primary-button {
  padding: 13px 16px;
}

@media (max-width: 980px) {
  .auth-card,
  .hero-panel,
  .content-grid,
  .battle-room-layout {
    grid-template-columns: 1fr;
  }

  .admin-page .auth-card {
    grid-template-columns: 1fr;
  }

  .stats-row,
  .summary-row,
  .recent-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding: 12px;
  }

  .auth-card {
    min-height: auto;
    padding: 14px;
  }

  .avatar-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-panel,
  .panel,
  .battle-room,
  .profile-card {
    padding: 16px;
    border-radius: 24px;
  }

  .stats-row,
  .summary-row,
  .recent-list,
  .battle-card-meta,
  .battle-card-buttons,
  .answer-row,
  .join-row,
  .profile-edit-grid,
  .form-grid.two-col,
  .form-grid.three-col,
  .invite-card,
  .invite-search-item {
    grid-template-columns: 1fr;
  }

  .leaderboard-card {
    grid-template-columns: auto 48px 1fr;
  }

  .admin-user-card,
  .admin-crud-card {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .leaderboard-card > :last-child {
    grid-column: 1 / -1;
  }

  .bottom-nav {
    width: calc(100vw - 16px);
    bottom: 8px;
  }
}