:root {
  --paper: #fcfcf8;
  --paper-soft: #f4f4ee;
  --paper-line: rgba(84, 101, 150, 0.08);
  --paper-line-strong: rgba(84, 101, 150, 0.14);
  --ink: #182036;
  --ink-soft: #5a6278;
  --indigo: #5a668f;
  --indigo-deep: #414d75;
  --indigo-faint: rgba(90, 102, 143, 0.12);
  --card: rgba(255, 255, 255, 0.82);
  --card-border: rgba(65, 77, 117, 0.12);
  --screen-a: #d7f0b0;
  --screen-b: #9fcb72;
  --screen-c: #5d8552;
  --screen-d: #23311f;
  --screen-border: #33425f;
  --screen-rim: #eef1f4;
  --accent: #4f5d88;
  --shadow-lg: 0 28px 70px rgba(27, 34, 54, 0.12);
  --shadow-md: 0 16px 34px rgba(27, 34, 54, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(90, 102, 143, 0.08), transparent 30%),
    radial-gradient(circle at left center, rgba(90, 102, 143, 0.05), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, var(--paper) 100%);
  overflow-x: hidden;
}

.ambient-layer {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--paper-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-line) 1px, transparent 1px),
    linear-gradient(var(--paper-line-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-line-strong) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
  pointer-events: none;
}

.page-shell {
  position: relative;
  z-index: 1;
  max-width: 1380px;
  margin: 0 auto;
  padding: 36px 22px 26px;
}

.hero-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 30px;
}

.hero-copy {
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(2.3rem, 5vw, 4.4rem);
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.hero-text {
  margin-top: 14px;
  max-width: 60ch;
  color: var(--ink-soft);
  line-height: 1.7;
}

.sound-toggle,
.screen-frame,
.screen-status,
.softkey-strip,
.panel-view,
.overlay-card,
.site-footer {
  font-family: "Lucida Console", "Courier New", monospace;
}

.sound-toggle {
  border: 1px solid rgba(65, 77, 117, 0.16);
  background: rgba(255, 255, 255, 0.88);
  color: var(--indigo-deep);
  padding: 11px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  box-shadow: var(--shadow-md);
  transition: transform 140ms ease, border-color 140ms ease;
}

.sound-toggle:hover,
.sound-toggle:focus-visible {
  outline: none;
  transform: translateY(-1px);
  border-color: rgba(65, 77, 117, 0.3);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 32px;
  align-items: start;
}

.phone-stage {
  display: flex;
  justify-content: center;
}

.screen-frame {
  width: min(100%, 640px);
  padding: 18px;
  border-radius: 36px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(244, 246, 251, 0.9)),
    linear-gradient(135deg, rgba(90, 102, 143, 0.08), rgba(90, 102, 143, 0.02));
  border: 1px solid rgba(65, 77, 117, 0.12);
  box-shadow: var(--shadow-lg);
}

.screen-crown {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  padding: 0 6px;
  color: var(--indigo-deep);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.crown-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(90, 102, 143, 0.08);
  border: 1px solid rgba(90, 102, 143, 0.12);
}

.crown-mark {
  color: var(--ink-soft);
}

.screen-bezel {
  padding: 14px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, var(--screen-rim) 0%, #d8deea 100%);
  border: 10px solid var(--indigo);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.7),
    inset 0 -8px 18px rgba(65, 77, 117, 0.08);
}

.screen-status,
.softkey-strip {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.67rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--indigo-deep);
}

.screen-status {
  margin-bottom: 10px;
}

.softkey-strip {
  margin-top: 10px;
}

.screen-shell {
  padding: 14px;
  border-radius: 24px;
  background: linear-gradient(180deg, #26334a 0%, var(--screen-border) 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 14px 28px rgba(31, 38, 59, 0.14);
}

.screen-glass {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(223, 253, 157, 0.45), rgba(115, 164, 77, 0.14)),
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.24), transparent 38%),
    linear-gradient(180deg, var(--screen-a) 0%, var(--screen-b) 38%, var(--screen-c) 100%);
  box-shadow:
    inset 0 0 0 2px rgba(26, 55, 32, 0.42),
    inset 0 16px 24px rgba(255, 255, 255, 0.1);
}

.screen-glass::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(34, 58, 33, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 58, 33, 0.06) 1px, transparent 1px);
  background-size: 100% 4px, 4px 100%;
  opacity: 0.9;
  pointer-events: none;
}

.screen-glass::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.22), transparent 38%, transparent 72%, rgba(255, 255, 255, 0.08));
  pointer-events: none;
}

#game-canvas,
.panel-view,
.overlay-view {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#game-canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.panel-view {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px 14px 12px;
  color: var(--screen-d);
  animation: screen-pop 160ms ease;
}

.panel-shell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
}

.panel-head {
  display: grid;
  gap: 4px;
}

.panel-kicker {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(28, 47, 28, 0.76);
}

.panel-title {
  font-size: clamp(1rem, 3vw, 1.45rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-copy {
  font-size: 0.73rem;
  line-height: 1.45;
}

.menu-list,
.text-list,
.info-list,
.control-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.menu-list {
  display: grid;
  gap: 6px;
  align-content: start;
}

.menu-list.is-compact {
  gap: 4px;
}

.menu-scroll-note {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 2px;
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(35, 49, 31, 0.74);
}

.menu-item {
  display: grid;
  gap: 3px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid rgba(27, 53, 28, 0.18);
  background: rgba(214, 241, 169, 0.18);
  color: var(--screen-d);
  border-radius: 10px;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.menu-list.is-compact .menu-item {
  padding: 7px 9px;
}

.menu-item:hover,
.menu-item:focus-visible,
.menu-item.is-active {
  outline: none;
  background: rgba(43, 66, 38, 0.92);
  color: #eef7d0;
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(19, 28, 16, 0.16);
}

.menu-item strong {
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu-item span {
  font-size: 0.65rem;
  line-height: 1.35;
}

.panel-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.text-list {
  display: grid;
  gap: 7px;
  font-size: 0.72rem;
  line-height: 1.45;
}

.text-list li::before,
.info-list li::before,
.control-list li::before {
  content: ">";
  margin-right: 8px;
  color: var(--accent);
}

.info-list,
.control-list {
  display: grid;
  gap: 10px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.overlay-view {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(12, 24, 14, 0.44);
  backdrop-filter: blur(1px);
}

.overlay-card {
  width: min(100%, 280px);
  padding: 16px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(215, 240, 176, 0.98), rgba(155, 199, 103, 0.94));
  color: var(--screen-d);
  box-shadow:
    inset 0 0 0 1px rgba(24, 42, 24, 0.2),
    0 20px 36px rgba(0, 0, 0, 0.2);
}

.overlay-card h3 {
  margin: 6px 0 10px;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.overlay-copy {
  font-size: 0.76rem;
  line-height: 1.55;
}

.overlay-section {
  margin-top: 12px;
}

.overlay-section ul {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 6px;
  font-size: 0.72rem;
  line-height: 1.45;
}

.overlay-section li::before {
  content: "-";
  margin-right: 8px;
}

.overlay-actions {
  margin-top: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.sidebar {
  display: grid;
  gap: 18px;
}

.info-card {
  padding: 18px 18px 20px;
  border-radius: 24px;
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
}

.info-card h2 {
  margin-bottom: 12px;
  font-size: 1.36rem;
  letter-spacing: -0.02em;
}

.info-copy {
  margin-bottom: 14px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.info-card.compact p:last-child {
  color: var(--ink-soft);
  line-height: 1.65;
}

.site-footer {
  margin-top: 24px;
  color: var(--ink-soft);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-footer a {
  color: var(--indigo-deep);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

@keyframes screen-pop {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}

@media (max-width: 760px) {
  .page-shell {
    padding: 22px 14px 22px;
  }

  .hero-bar {
    flex-direction: column;
  }

  .screen-frame {
    padding: 12px;
    border-radius: 28px;
  }

  .screen-crown {
    margin-bottom: 10px;
    padding: 0 2px;
    font-size: 0.64rem;
  }

  .screen-bezel {
    padding: 10px;
    border-width: 7px;
    border-radius: 22px;
  }

  .screen-shell {
    padding: 10px;
    border-radius: 16px;
  }

  .panel-view {
    padding: 12px 12px 10px;
  }

  .panel-title {
    font-size: 0.96rem;
  }

  .panel-copy,
  .text-list {
    font-size: 0.68rem;
  }
}