* {
  box-sizing: border-box;
}

:root {
  --bg: #080a0f;
  --panel: #111620;
  --panel-2: #171d28;
  --line: #2b3444;
  --text: #f2f5fa;
  --muted: #9aa5b6;
  --green: #76e39c;
  --purple: #a797ff;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at 50% -15%, #1a2330 0%, #0b0d13 43%, #07080c 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button,
.button-link,
.home-link {
  -webkit-tap-highlight-color: transparent;
}

button {
  cursor: pointer;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.eyebrow {
  color: var(--green);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.primary-btn,
.secondary-btn,
.button-link {
  min-height: 44px;
  border-radius: 10px;
  padding: 11px 18px;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.primary-btn {
  border: 0;
  background: #f3f6fb;
  color: #090b10;
}

.secondary-btn,
.button-link {
  border: 1px solid #3a4457;
  background: #171c26;
  color: #edf1f7;
}

.primary-btn:hover,
.secondary-btn:hover,
.button-link:hover,
.home-link:hover {
  filter: brightness(1.08);
}

.hidden {
  display: none !important;
}

/* ---------------- Home page ---------------- */

.home-body {
  padding: 34px 22px 54px;
}

.home-page {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.65fr);
  gap: 42px;
  align-items: end;
  padding: 30px 0 26px;
}

.home-hero h1 {
  margin: 7px 0 14px;
  font-size: clamp(52px, 8vw, 90px);
  line-height: 0.9;
  letter-spacing: -0.065em;
}

.home-hero p {
  max-width: 710px;
  margin-bottom: 0;
  color: #b7c0ce;
  font-size: 17px;
  line-height: 1.6;
}

.name-box {
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 18px;
  background: rgba(16, 21, 30, 0.84);
}

.name-box label {
  display: block;
  margin-bottom: 8px;
  color: #abb5c5;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.name-box input {
  width: 100%;
  min-height: 46px;
  border: 1px solid #3a4558;
  border-radius: 10px;
  outline: 0;
  padding: 0 13px;
  background: #0d1118;
  color: var(--text);
  font-size: 16px;
}

.name-box input:focus {
  border-color: #8390a5;
  box-shadow: 0 0 0 3px rgba(131, 144, 165, 0.16);
}

.name-box input.invalid {
  border-color: #e27272;
}

.name-error {
  min-height: 18px;
  margin-top: 6px;
  color: #ff8b8b;
  font-size: 12px;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 12px 0 46px;
}

.mode-card {
  display: flex;
  min-height: 330px;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 17px;
  padding: 25px;
  background: rgba(16, 21, 30, 0.86);
}

.featured-mode {
  border-color: #4a526d;
  background:
    radial-gradient(circle at 100% 0%, rgba(109, 92, 201, 0.18), transparent 44%),
    rgba(18, 22, 33, 0.92);
}

.mode-tag {
  margin-bottom: 10px;
  color: #828da0;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.mode-card h2 {
  margin-bottom: 9px;
  font-size: 30px;
  letter-spacing: -0.035em;
}

.mode-card p {
  color: #adb7c7;
  line-height: 1.55;
}

.mode-card ul {
  flex: 1;
  margin: 4px 0 22px;
  padding-left: 20px;
  color: #c8cfda;
  line-height: 1.75;
}

.mode-button {
  align-self: flex-start;
  min-width: 180px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 14px;
}

.section-heading h2 {
  margin: 3px 0 0;
  font-size: 34px;
  letter-spacing: -0.04em;
}

.section-heading p {
  margin: 0;
  color: #778296;
  font-size: 12px;
}

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

.leaderboard-card {
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(15, 20, 29, 0.88);
}

.leaderboard-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 17px 20px 13px;
  border-bottom: 1px solid #252d3a;
}

.leaderboard-title h3 {
  margin: 0;
  font-size: 20px;
}

.leaderboard-title span {
  color: #778296;
  font-size: 11px;
}

.leaderboard-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: rank;
}

.leaderboard-list li {
  counter-increment: rank;
  display: grid;
  grid-template-columns: 26px minmax(90px, 0.55fr) minmax(120px, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 48px;
  padding: 7px 20px;
  border-bottom: 1px solid #222a36;
}

.leaderboard-list li:last-child {
  border-bottom: 0;
}

.leaderboard-list li::before {
  content: counter(rank);
  color: #6f7a8d;
  font-size: 12px;
  font-weight: 900;
}

.leaderboard-list strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-list span {
  overflow: hidden;
  color: #8f9bad;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-list b {
  font-variant-numeric: tabular-nums;
}

.leaderboard-list .empty-score {
  grid-template-columns: 1fr;
  color: #7c8798;
}

.leaderboard-list .empty-score::before {
  display: none;
}

.controls-strip,
.controls,
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.controls-strip {
  margin-top: 18px;
  color: #9aa5b6;
  font-size: 12px;
}

.controls-strip span,
.controls span,
.legend span {
  border: 1px solid #252d3a;
  border-radius: 999px;
  padding: 6px 9px;
  background: rgba(16, 20, 28, 0.78);
}

/* ---------------- Game page ---------------- */

.game-body {
  display: flex;
  justify-content: center;
  padding: 22px;
}

.wrap {
  width: min(100%, 1220px);
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 12px;
}

.game-title-line {
  display: flex;
  align-items: center;
  gap: 11px;
}

.topbar h1 {
  margin-bottom: 3px;
  font-size: 28px;
  letter-spacing: -0.035em;
}

.topbar p {
  margin: 0;
  color: #8f9aab;
  font-size: 13px;
}

.mode-badge {
  border: 1px solid #3e485d;
  border-radius: 999px;
  padding: 4px 8px;
  color: #b9c3d2;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.controls {
  justify-content: flex-end;
  color: #aeb7c6;
  font-size: 12px;
}

.home-link {
  border: 1px solid #30394a;
  border-radius: 9px;
  padding: 7px 10px;
  color: #d6dce6;
  font-size: 11px;
  font-weight: 900;
  text-decoration: none;
}

.game-shell {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid #2e3747;
  border-radius: 15px;
  background: #050608;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.34);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  outline: 0;
}

.panel {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 28px;
  background: rgba(5, 7, 10, 0.82);
  backdrop-filter: blur(7px);
}

.result-card,
.upgrade-panel-card {
  width: min(820px, 100%);
  text-align: center;
}

.result-card {
  width: min(560px, 100%);
}

.result-card h2,
.upgrade-panel-card h2 {
  margin: 7px 0 10px;
  font-size: clamp(35px, 5vw, 54px);
  letter-spacing: -0.05em;
}

.result-card p,
.upgrade-panel-card > p {
  color: #aeb8c8;
  line-height: 1.55;
}

.final-score {
  margin: 20px 0 13px;
  font-size: 56px;
  font-weight: 950;
  letter-spacing: -0.045em;
}

.final-score::after {
  content: " POINTS";
  display: block;
  color: #6f7b8d;
  font-size: 11px;
  letter-spacing: 0.15em;
}

.final-mods {
  min-height: 24px;
  margin-bottom: 20px;
  color: #9faabd;
  font-size: 12px;
}

.result-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.upgrade-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 23px;
}

.upgrade-choice {
  min-height: 190px;
  border: 1px solid #394358;
  border-radius: 14px;
  padding: 18px;
  text-align: left;
  background: #131925;
  color: var(--text);
  cursor: pointer;
}

.upgrade-choice:hover {
  border-color: #6a7590;
  background: #171f2d;
}

.upgrade-choice .upgrade-icon {
  display: inline-grid;
  width: 35px;
  height: 35px;
  place-items: center;
  margin-bottom: 17px;
  border: 1px solid #414d63;
  border-radius: 9px;
  background: #0c1017;
  font-weight: 950;
}

.upgrade-choice h3 {
  margin-bottom: 7px;
  font-size: 19px;
}

.upgrade-choice p {
  margin-bottom: 12px;
  color: #9eabba;
  line-height: 1.45;
  font-size: 13px;
}

.upgrade-choice small {
  color: #7d899c;
  font-weight: 800;
}

.legend {
  margin-top: 10px;
  color: #8f9bad;
  font-size: 11px;
}

@media (max-width: 800px) {
  .home-body,
  .game-body {
    padding: 12px;
  }

  .home-hero,
  .mode-grid,
  .leaderboard-grid {
    grid-template-columns: 1fr;
  }

  .home-hero {
    gap: 20px;
  }

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

  .top-actions {
    width: 100%;
    align-items: flex-start;
    flex-direction: column;
  }

  .controls {
    justify-content: flex-start;
  }

  .upgrade-grid {
    grid-template-columns: 1fr;
  }

  .panel {
    overflow-y: auto;
    place-content: start center;
  }

  .leaderboard-list li {
    grid-template-columns: 22px minmax(80px, 0.65fr) minmax(90px, 1fr) auto;
    padding-inline: 12px;
  }
}


.leaderboard-online {
  color: #7fdda1 !important;
}

.leaderboard-warning {
  color: #d6ad70 !important;
}