.site-header {
  /* Sticky site header that gets slightly denser once the page scrolls. */
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(8, 12, 20, 0.7);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--surface-border);
  transition: background 180ms ease-out, border-color 180ms ease-out;
}

.site-header.is-scrolled {
  background: var(--bg-deep);
}

.navbar {
  /* Shared nav layout: brand on the left, links/meta filling remaining width. */
  width: min(var(--content-width), calc(100% - 40px));
  height: var(--nav-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  position: relative;
}

.brand {
  font-size: 18px;
  letter-spacing: 0.15em;
}

.nav-toggle {
  /* Mobile-only menu trigger; hidden on desktop. */
  width: 38px;
  height: 38px;
  margin-left: auto;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(16px);
  border-radius: 12px;
  display: none;
  align-items: center;
  justify-content: center;
  color: rgba(232, 244, 255, 0.82);
  cursor: pointer;
  transition: border-color 180ms ease-out, color 180ms ease-out, background 180ms ease-out;
}

.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  border-color: rgba(0, 229, 255, 0.28);
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  display: block;
  transition: transform 180ms ease-out, opacity 180ms ease-out;
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before {
  top: -5px;
}

.nav-toggle__bars::after {
  top: 5px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(5px) rotate(90deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  opacity: 0;
}

.nav-panel {
  /* Container for both the link list and the right-side nav metadata. */
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-links,
.nav-meta {
  display: flex;
  align-items: center;
}

.nav-links {
  justify-content: center;
  gap: 28px;
}

.nav-link {
  position: relative;
  font-size: 12px;
  opacity: 0.72;
  transition: opacity 180ms ease-out, color 180ms ease-out;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -10px;
  height: 2px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: var(--shadow-cyan);
  opacity: 0;
  transform: scaleX(0.72);
  transition: opacity 180ms ease-out, transform 180ms ease-out;
}

.nav-link:hover,
.nav-link.is-active {
  opacity: 1;
}

.nav-link.is-active::after,
.nav-link:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-meta {
  gap: 12px;
}

.countdown-pill,
.user-chip,
.power-button {
  height: 38px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(16px);
  border-radius: 999px;
}

.countdown-pill {
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--amber);
  box-shadow: inset 0 0 0 1px rgba(255, 180, 0, 0.06);
}

.countdown-label,
.countdown-value {
  font-size: 11px;
  letter-spacing: 0.08em;
}

.user-chip {
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(232, 244, 255, 0.82);
}

.user-chip span {
  color: var(--muted);
  margin-left: 6px;
}

.power-button {
  width: 38px;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  transition: border-color 180ms ease-out, color 180ms ease-out, transform 180ms ease-out;
}

.power-button svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.power-button:hover {
  color: var(--red);
  border-color: rgba(255, 95, 115, 0.38);
  transform: translateY(-1px);
}

.glass-card {
  /* Base card treatment reused throughout the site. */
  background: var(--surface);
  border: 1px solid var(--surface-border);
  backdrop-filter: blur(16px);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.hero-grid,
.mid-grid,
.lower-grid {
  /* Dashboard layout primitives split the page into stacked responsive grids. */
  display: grid;
  gap: 32px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  align-items: stretch;
}

.mid-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  margin-top: 32px;
}

.lower-grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  margin-top: 32px;
}

.score-card,
.stat-card,
.standings-card,
.first-blood-card,
.performance-card,
.feed-card {
  transition: transform 180ms ease-out, border-color 180ms ease-out, box-shadow 180ms ease-out;
}

.score-card:hover,
.stat-card:hover,
.standings-card:hover,
.first-blood-card:hover,
.performance-card:hover,
.feed-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.18);
}

.score-card {
  /* Main dashboard KPI card. */
  min-height: 180px;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.score-card__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.score-card__icon {
  font-size: 18px;
  color: var(--cyan);
}

.score-card__sparkline {
  width: 180px;
  height: 64px;
}

.sparkline-path {
  fill: none;
  stroke: url(#spark-gradient);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.score-value {
  font-family: "JetBrains Mono", monospace;
  font-size: clamp(42px, 5vw, 52px);
  line-height: 1;
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(0, 229, 255, 0.32);
}

.score-label {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: lowercase;
}

.hero-stack {
  display: grid;
  gap: 12px;
}

.stat-card {
  min-height: 56px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stat-card__icon {
  font-size: 14px;
}

.stat-card__label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.stat-card__value {
  font-family: "JetBrains Mono", monospace;
  font-size: 24px;
  color: var(--cyan);
}

.stat-card__value--amber {
  color: var(--amber);
  text-shadow: var(--shadow-amber);
}

.stat-rank {
  display: flex;
  align-items: center;
  gap: 8px;
}

.rank-delta {
  color: var(--green);
  font-size: 13px;
}

.standings-card,
.first-blood-card,
.performance-card,
.feed-card {
  padding: 22px;
}

.standings-card {
  /* Leaderboard panel uses internal scrolling to keep the page height stable. */
  position: relative;
  min-height: 280px;
  overflow: hidden;
}

.standings-card::after,
.feed-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 46px;
  background: linear-gradient(180deg, rgba(8, 12, 20, 0), rgba(8, 12, 20, 0.92));
  pointer-events: none;
}

.standings-list {
  max-height: 214px;
  overflow-y: auto;
  padding-right: 6px;
}

.standings-list::-webkit-scrollbar,
.solve-feed::-webkit-scrollbar {
  width: 6px;
}

.standings-list::-webkit-scrollbar-thumb,
.solve-feed::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
}

.standing-row {
  display: grid;
  grid-template-columns: 54px 1fr 74px 56px;
  gap: 12px;
  align-items: center;
  min-height: 42px;
  padding: 0 12px;
  font-size: 12px;
  color: rgba(232, 244, 255, 0.7);
}

.standing-row + .standing-row {
  margin-top: 6px;
}

.standing-row--active {
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.12), rgba(0, 229, 255, 0.03));
  border-left: 2px solid var(--cyan);
  color: var(--text);
}

.delta.up {
  color: var(--green);
}

.delta.flat {
  color: rgba(255, 255, 255, 0.35);
}

.delta.down {
  color: var(--red);
}

.first-blood-card {
  box-shadow: inset 0 1px 0 rgba(255, 180, 0, 0.08);
}

.first-blood-list {
  display: grid;
  gap: 12px;
}

.first-blood-entry {
  min-height: 54px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 180, 0, 0.08);
}

.first-blood-entry--latest {
  display: grid;
  grid-template-columns: 10px 1fr;
  gap: 12px;
}

.entry-title {
  color: var(--text);
  font-size: 15px;
}

.entry-title span {
  color: var(--amber);
  margin-right: 6px;
}

.first-blood-entry p {
  margin: 6px 0 0;
  font-size: 13px;
  color: rgba(232, 244, 255, 0.4);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 10px rgba(255, 180, 0, 0.6);
}

.performance-list {
  /* Shared vertical list used for category bars in multiple pages. */
  display: grid;
  gap: 16px;
}

.performance-row {
  display: grid;
  gap: 8px;
}

.performance-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: rgba(232, 244, 255, 0.76);
}

.bar-track {
  position: relative;
  height: 8px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
}

.bar-fill {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-deep));
  box-shadow: inset -8px 0 10px rgba(255, 255, 255, 0.08), 0 0 16px rgba(0, 229, 255, 0.16);
}

.bar-fill--strong {
  box-shadow: inset -8px 0 10px rgba(255, 255, 255, 0.14), 0 0 20px rgba(0, 229, 255, 0.28);
}

.feed-card {
  position: relative;
}

.solve-feed {
  max-height: 216px;
  overflow: hidden auto;
  display: grid;
  gap: 10px;
  padding-right: 8px;
}

.feed-row {
  display: grid;
  grid-template-columns: 16px minmax(80px, 104px) 16px 1fr 42px 58px;
  gap: 8px;
  align-items: center;
  font-size: 11px;
  line-height: 1.2;
  color: rgba(232, 244, 255, 0.68);
}

.feed-row--active {
  color: var(--text);
}

.feed-check,
.feed-points {
  color: var(--cyan);
}

.feed-time {
  color: rgba(255, 255, 255, 0.25);
}

@media (max-width: 1180px) {
  .navbar {
    width: min(calc(100% - 24px), 100%);
  }

  .site-header {
    border-bottom-color: rgba(255, 255, 255, 0.05);
  }

  .nav-links {
    gap: 18px;
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .mid-grid,
  .lower-grid {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-panel {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    padding: 16px;
    border: 1px solid var(--surface-border);
    border-radius: 20px;
    background: rgba(8, 12, 20, 0.96);
    backdrop-filter: blur(20px);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.28);
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease-out, transform 180ms ease-out, visibility 180ms ease-out;
  }

  .navbar.is-open .nav-panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-links,
  .nav-meta {
    width: 100%;
    justify-content: flex-start;
  }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .nav-link::after {
    bottom: -5px;
  }

  .nav-meta {
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 720px) {
  .countdown-pill,
  .user-chip {
    width: 100%;
    justify-content: center;
  }

  .feed-row {
    grid-template-columns: 16px minmax(74px, 90px) 16px minmax(110px, 1fr) 42px 54px;
  }

  .standing-row {
    grid-template-columns: 42px 1fr 62px 48px;
    gap: 8px;
  }
}

.challenge-page .challenges-hero__intro h1,
.challenge-page .challenge-control-card h2,
.challenge-page .challenge-card h3,
.challenge-page .challenge-stat-card p,
.challenge-page .challenge-empty p,
.challenge-page .challenge-modal h2,
.challenge-page .challenge-modal__description,
.challenge-page .challenge-modal__author,
.challenge-page .challenge-auth-modal__copy,
.challenge-page .challenge-modal__feedback,
.challenge-page .challenge-auth-modal__feedback,
.challenge-page .challenge-admin-list__item strong,
.challenge-page .challenge-admin-list__item p {
  font-family: "Inter", sans-serif;
}

.challenge-page .challenges-hero__intro h1,
.challenge-page .challenge-control-card h2 {
  /* Challenges page opts into a more product-like heading treatment. */
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.02;
  text-wrap: balance;
}

.challenge-page .challenges-hero__intro p,
.challenge-page .challenge-stat-card p,
.challenge-page .challenge-empty p,
.challenge-page .challenge-modal__description,
.challenge-page .challenge-modal__author,
.challenge-page .challenge-auth-modal__copy {
  font-size: 1rem;
  font-weight: 500;
}

.challenges-hero {
  /* Overview row for the challenges landing page. */
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) repeat(3, minmax(180px, 0.7fr));
  gap: 24px;
  margin-bottom: 32px;
}

.challenges-hero__intro,
.challenge-stat-card,
.challenge-control-card,
.challenge-admin-panel,
.challenge-card,
.challenge-empty,
.challenge-modal__panel {
  padding: 24px;
}

.challenges-hero__intro h1,
.challenge-control-card h2 {
  margin: 0;
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
  line-height: 1.05;
}

.challenges-hero__intro p,
.challenge-stat-card p,
.challenge-empty p {
  margin: 12px 0 0;
  color: rgba(232, 244, 255, 0.62);
  line-height: 1.7;
}

.challenge-stat-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 180px;
}

.challenge-stat-card__value {
  font-family: "JetBrains Mono", monospace;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  color: var(--cyan);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.18);
}

.challenge-stat-card__value--small {
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: 0.08em;
}

.challenge-control-card,
.challenge-admin-panel {
  margin-bottom: 32px;
}

.challenge-control-card__header,
.challenge-toolbar,
.challenge-admin-list__item,
.challenge-modal__download,
.challenge-modal__flag {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.challenge-admin-toggle,
.challenge-primary-button,
.challenge-modal__download button,
.challenge-modal__flag button {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(0, 229, 255, 0.24);
  background: rgba(0, 229, 255, 0.1);
  color: var(--cyan);
  cursor: pointer;
  transition: transform 180ms ease-out, border-color 180ms ease-out, background 180ms ease-out;
}

.challenge-admin-toggle:hover,
.challenge-admin-toggle[aria-pressed="true"],
.challenge-primary-button:hover,
.challenge-modal__download button:hover,
.challenge-modal__flag button:hover {
  transform: translateY(-1px);
  border-color: rgba(0, 229, 255, 0.42);
  background: rgba(0, 229, 255, 0.16);
}

.challenge-toolbar {
  display: grid;
  grid-template-columns: minmax(280px, 460px) minmax(0, 1fr);
  margin-top: 28px;
  align-items: end;
  gap: 28px;
}

.challenge-search {
  min-width: 0;
  max-width: 460px;
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.challenge-search__label,
.challenge-admin-form label span,
.challenge-admin-list__title,
.challenge-modal__points,
.challenge-modal__hints-title {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(232, 244, 255, 0.42);
}

.challenge-search input,
.challenge-admin-form input,
.challenge-admin-form textarea,
.challenge-admin-form select,
.challenge-modal__flag input,
.challenge-auth-modal__form input {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  font-family: "Inter", sans-serif;
  font-weight: 600;
}

.challenge-admin-form textarea {
  min-height: 110px;
  padding: 14px;
  resize: vertical;
}

.challenge-search input:focus,
.challenge-admin-form input:focus,
.challenge-admin-form textarea:focus,
.challenge-admin-form select:focus,
.challenge-modal__flag input:focus,
.challenge-auth-modal__form input:focus {
  outline: none;
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
}

.challenge-search input::placeholder,
.challenge-admin-form input::placeholder,
.challenge-admin-form textarea::placeholder,
.challenge-modal__flag input::placeholder {
  color: rgba(232, 244, 255, 0.28);
}

.challenge-meta-pills,
.challenge-filters,
.challenge-card__footer,
.challenge-modal__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.challenge-meta-pills {
  justify-content: flex-end;
  align-self: end;
}

.challenge-filters {
  margin-top: 40px;
  gap: 16px;
}

.challenge-pill,
.challenge-filter,
.challenge-badge,
.challenge-admin-chip {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.03);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.challenge-filter {
  cursor: pointer;
  color: rgba(232, 244, 255, 0.72);
  transition: border-color 180ms ease-out, color 180ms ease-out, background 180ms ease-out;
}

.challenge-filter:hover,
.challenge-filter.is-active {
  color: var(--text);
  border-color: rgba(0, 229, 255, 0.32);
  background: rgba(0, 229, 255, 0.1);
}

.challenge-admin-panel__grid {
  /* Admin form and delete list render side by side until tablet sizes. */
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 24px;
}

.challenge-admin-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.challenge-admin-form__full,
.challenge-primary-button {
  grid-column: 1 / -1;
}

.challenge-admin-form label {
  display: grid;
  gap: 8px;
}

.challenge-admin-list {
  border-left: 1px solid rgba(255, 255, 255, 0.06);
  padding-left: 24px;
}

.challenge-admin-list__title {
  margin-bottom: 14px;
}

.challenge-admin-list__items {
  display: grid;
  gap: 10px;
}

.challenge-admin-list__item {
  min-height: 58px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.02);
}

.challenge-admin-list__item strong,
.challenge-card h3,
.challenge-modal h2 {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
}

.challenge-admin-remove {
  min-width: 54px;
  min-height: 54px;
  display: inline-grid;
  place-items: center;
  border-radius: 16px;
  border: 1px solid rgba(255, 95, 115, 0.32);
  background: rgba(255, 95, 115, 0.08);
  color: var(--red);
  cursor: pointer;
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 180ms ease-out, background 180ms ease-out, border-color 180ms ease-out;
}

.challenge-pill {
  color: rgba(232, 244, 255, 0.74);
}

.challenge-admin-remove:hover {
  transform: translateY(-1px);
  background: rgba(255, 95, 115, 0.16);
  border-color: rgba(255, 95, 115, 0.5);
}

.challenge-grid {
  /* Responsive card grid populated from client-side state. */
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 26px;
}

.challenge-card {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 18px 18px 20px;
  cursor: pointer;
  transition: transform 180ms ease-out, border-color 180ms ease-out, box-shadow 180ms ease-out;
}

.challenge-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 229, 255, 0.24);
  box-shadow: var(--shadow-cyan);
}

.challenge-card--solved {
  border-color: rgba(53, 226, 143, 0.95);
  box-shadow: 0 0 0 1px rgba(53, 226, 143, 0.32), 0 0 24px rgba(53, 226, 143, 0.12);
}

.challenge-card--solved:hover {
  border-color: rgba(53, 226, 143, 1);
  box-shadow: 0 0 0 1px rgba(53, 226, 143, 0.4), 0 0 28px rgba(53, 226, 143, 0.18);
}

.challenge-card__head,
.challenge-hint__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.challenge-card__description,
.challenge-card__meta,
.challenge-admin-list__item p,
.challenge-modal__description,
.challenge-modal__author,
.challenge-hint__content {
  color: rgba(232, 244, 255, 0.62);
  line-height: 1.6;
}

.challenge-card__top {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.challenge-card__iconbox {
  width: 58px;
  height: 58px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.045);
  display: grid;
  place-items: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  color: rgba(232, 244, 255, 0.82);
}

.challenge-card__header {
  display: grid;
  gap: 6px;
}

.challenge-card h3 {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-align: left;
  text-transform: uppercase;
}

.challenge-card__line {
  margin: 0;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.92rem;
  color: rgba(196, 211, 234, 0.78);
}

.challenge-card__info-row {
  display: grid;
  gap: 10px;
  justify-items: start;
}

.challenge-card__info-pill {
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.035);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: rgba(232, 244, 255, 0.82);
}

.challenge-card__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.challenge-card__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.92rem;
  color: rgba(232, 244, 255, 0.86);
}

.challenge-card__meta-icon {
  color: rgba(232, 244, 255, 0.9);
  font-size: 0.95rem;
}

.challenge-card__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: auto;
}

.challenge-card__status {
  min-height: 30px;
  padding: 0 14px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.03em;
}

.challenge-card__status--solved {
  background: rgba(53, 226, 143, 0.12);
  color: var(--green);
  border: 1px solid rgba(53, 226, 143, 0.28);
}

.challenge-card__status--unsolved {
  background: rgba(255, 255, 255, 0.04);
  color: rgba(232, 244, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.challenge-card__status-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.95);
  color: var(--green);
  font-size: 0.8rem;
}

.challenge-card__button {
  min-width: 156px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  border: 1px solid rgba(255, 166, 67, 0.34);
  background: linear-gradient(180deg, #ffae52, #ff9330);
  color: #fff8f0;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.96rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform 180ms ease-out, filter 180ms ease-out;
}

.challenge-card__button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.challenge-card__stats {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}

.challenge-card__difficulty--easy {
  color: var(--green);
}

.challenge-card__difficulty--medium {
  color: var(--amber);
}

.challenge-card__difficulty--hard {
  color: var(--red);
}

.challenge-category--web,
.challenge-category--osint {
  color: var(--cyan);
}

.challenge-category--crypto,
.challenge-category--welcome {
  color: var(--amber);
}

.challenge-category--forensics,
.challenge-category--reverse {
  color: #ff85d5;
}

.challenge-category--pwn {
  color: var(--red);
}

.challenge-category--misc {
  color: rgba(232, 244, 255, 0.58);
}

.challenge-empty {
  margin-top: 18px;
}

.challenge-modal {
  /* Full-screen overlay for challenge details and flag submission. */
  position: fixed;
  inset: 0;
  z-index: 70;
  display: grid;
  place-items: center;
  padding: 24px;
}

.challenge-modal[hidden] {
  display: none;
}

.challenge-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 12, 20, 0.72);
  backdrop-filter: blur(10px);
}

.challenge-modal__panel {
  position: relative;
  z-index: 1;
  width: min(680px, 100%);
  max-height: min(90vh, 840px);
  overflow: auto;
}

.challenge-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--surface-border);
  cursor: pointer;
}

.challenge-modal__description,
.challenge-modal__author,
.challenge-modal__download,
.challenge-modal__hints,
.challenge-modal__flag {
  margin-top: 18px;
}

.challenge-modal__download {
  min-height: 58px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.025);
}

.challenge-modal__feedback,
.challenge-auth-modal__feedback {
  min-height: 24px;
  margin: 16px 0 0;
  font-size: 0.95rem;
  color: rgba(232, 244, 255, 0.66);
}

.challenge-modal__feedback.is-success,
.challenge-auth-modal__feedback.is-success {
  color: var(--green);
}

.challenge-modal__feedback.is-error,
.challenge-auth-modal__feedback.is-error {
  color: var(--red);
}

.challenge-hint {
  margin-top: 10px;
  border-radius: 14px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.challenge-hint__toggle {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  cursor: pointer;
}

.challenge-hint__content {
  padding: 0 16px 16px;
}

.challenge-hint__content[hidden] {
  display: none;
}

body.challenge-modal-open {
  overflow: hidden;
}

.challenge-auth-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 24px;
}

.challenge-auth-modal[hidden] {
  display: none;
}

.challenge-auth-modal__panel {
  position: relative;
  z-index: 1;
  width: min(460px, 100%);
  padding: 24px;
}

.challenge-auth-modal__panel h2 {
  margin: 0;
  font-family: "Inter", sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.challenge-auth-modal__copy {
  margin: 12px 0 0;
  color: rgba(232, 244, 255, 0.62);
  line-height: 1.6;
}

.challenge-auth-modal__form {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.challenge-auth-modal__form input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
}

@media (max-width: 1180px) {
  .challenges-hero {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .challenges-hero__intro {
    grid-column: 1 / -1;
  }
}

@media (max-width: 980px) {
  .challenge-admin-panel__grid {
    grid-template-columns: 1fr;
  }

  .challenge-admin-list {
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-left: 0;
    padding-top: 20px;
  }
}

@media (max-width: 720px) {
  .challenges-hero,
  .challenge-admin-form {
    grid-template-columns: 1fr;
  }

  .challenge-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .challenge-control-card__header,
  .challenge-toolbar,
  .challenge-admin-list__item,
  .challenge-card__actions,
  .challenge-modal__download,
  .challenge-modal__flag {
    align-items: stretch;
    flex-direction: column;
  }

  .challenge-card__button {
    width: 100%;
  }

  .challenge-modal {
    padding: 14px;
  }

  .challenge-auth-modal {
    padding: 14px;
  }

  .challenge-meta-pills {
    justify-content: flex-start;
  }
}