:root {
  --mondrian-red: #E31B23;
  --mondrian-blue: #1951A0;
  --mondrian-yellow: #FAD201;
  --mondrian-white: #FFFFFF;
  --mondrian-black: #16161D;
  --border: 4px solid var(--mondrian-black);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  font-family: "Comic Sans MS", "Comic Sans", cursive;
  color: var(--mondrian-black);
  background: var(--mondrian-white);
}

.page {
  height: 100%;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto auto;
}

.page-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  min-height: 0;
  overflow: hidden;
}

/* Header band */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  border-bottom: var(--border);
}

.hero-title {
  margin: 0;
  padding: 10px 18px;
  background: var(--mondrian-red);
  color: var(--mondrian-white);
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.1;
}

.hero-tag {
  margin: 0;
  padding: 10px 18px;
  background: var(--mondrian-black);
  color: var(--mondrian-yellow);
  font-size: clamp(11px, 1.4vw, 14px);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

/* Main Mondrian grid */
.composition {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr) minmax(0, 1fr);
  min-height: 0;
  overflow: hidden;
}

.download-block {
  grid-row: 1 / 3;
  background: var(--mondrian-yellow);
  border-right: var(--border);
  padding: clamp(14px, 2vw, 28px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 12px;
  min-height: 0;
}

.download-block h2 {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 28px);
  font-weight: 700;
  line-height: 1.15;
  max-width: 16ch;
}

.download-block p {
  margin: 0;
  font-size: clamp(12px, 1.35vw, 15px);
  line-height: 1.35;
  max-width: 34ch;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  background: var(--mondrian-red);
  color: var(--mondrian-white);
  border: 3px solid var(--mondrian-black);
  font-family: inherit;
  font-size: clamp(14px, 1.8vw, 18px);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--mondrian-black);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.download-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--mondrian-black);
}

.download-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--mondrian-black);
}

.download-toast {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: 100;
  padding: 10px 18px;
  background: var(--mondrian-blue);
  color: var(--mondrian-white);
  border: 3px solid var(--mondrian-black);
  font-size: 13px;
  font-weight: 700;
  box-shadow: 4px 4px 0 var(--mondrian-black);
  transition: transform 0.35s ease;
  pointer-events: none;
}

.download-toast.visible {
  transform: translateX(-50%) translateY(0);
}

.panel {
  padding: clamp(12px, 1.8vw, 20px);
  min-height: 0;
  overflow: auto;
}

.panel-install {
  background: var(--mondrian-white);
  border-bottom: var(--border);
}

.panel-play {
  background: var(--mondrian-blue);
  color: var(--mondrian-white);
}

.panel h3 {
  margin: 0 0 10px;
  font-size: clamp(14px, 1.8vw, 18px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.panel-play h3 {
  color: var(--mondrian-yellow);
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  align-items: start;
  font-size: clamp(12px, 1.25vw, 14px);
  line-height: 1.35;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--mondrian-black);
  color: var(--mondrian-yellow);
  font-weight: 700;
  font-size: 12px;
  flex-shrink: 0;
}

.panel-play .step-num {
  background: var(--mondrian-yellow);
  color: var(--mondrian-black);
}

code,
kbd {
  font-family: "Courier New", Courier, monospace;
  font-size: 0.9em;
  padding: 1px 4px;
  background: rgba(0, 0, 0, 0.08);
  border: 1px solid var(--mondrian-black);
}

.panel-play code,
.panel-play kbd {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--mondrian-yellow);
}

/* Leaderboard sidebar */
.leaderboard-sidebar {
  display: flex;
  flex-direction: column;
  background: var(--mondrian-white);
  border-left: var(--border);
  min-height: 0;
  overflow: hidden;
}

.leaderboard-header {
  padding: 8px 12px;
  background: var(--mondrian-red);
  color: var(--mondrian-white);
  border-bottom: 3px solid var(--mondrian-black);
  font-size: clamp(12px, 1.4vw, 15px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
  flex-shrink: 0;
}

.leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 8px 10px 12px;
  overflow-y: auto;
  flex: 1 1 auto;
  min-height: 0;
}

.leaderboard-item {
  display: grid;
  grid-template-columns: auto minmax(44px, auto) 1fr;
  gap: 5px;
  align-items: baseline;
  margin-bottom: 7px;
  padding-bottom: 7px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
  font-size: 12px;
  line-height: 1.25;
}

.leaderboard-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.leaderboard-item-done .leaderboard-blocks {
  color: var(--mondrian-blue);
}

.leaderboard-rank {
  font-weight: 700;
  color: var(--mondrian-black);
}

.leaderboard-blocks {
  font-weight: 700;
  color: var(--mondrian-red);
  white-space: nowrap;
}

.leaderboard-meta {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.leaderboard-player {
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-page {
  color: var(--mondrian-blue);
  font-size: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-empty {
  font-size: 12px;
  color: var(--mondrian-blue);
  font-style: italic;
  line-height: 1.35;
}

.footer {
  padding: 6px 14px;
  background: var(--mondrian-black);
  color: var(--mondrian-white);
  font-size: 11px;
  text-align: center;
  line-height: 1.4;
}

.footer a {
  color: var(--mondrian-yellow);
}

.accent-strip {
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--mondrian-red) 0%,
    var(--mondrian-red) 33%,
    var(--mondrian-yellow) 33%,
    var(--mondrian-yellow) 66%,
    var(--mondrian-blue) 66%,
    var(--mondrian-blue) 100%
  );
  border-top: var(--border);
}

@media (max-width: 820px) {
  body {
    height: auto;
    min-height: 100vh;
    min-height: 100dvh;
    overflow: auto;
  }

  .page {
    height: auto;
    min-height: 100vh;
    min-height: 100dvh;
  }

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

  .hero-tag {
    justify-content: center;
    border-top: var(--border);
  }

  .page-body {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .leaderboard-sidebar {
    border-left: none;
    border-top: var(--border);
    max-height: 280px;
  }

  .composition {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    overflow: visible;
  }

  .download-block {
    grid-row: auto;
    border-right: none;
    border-bottom: var(--border);
  }

  .panel-install {
    border-bottom: var(--border);
  }
}