:root {
  --bg: #f3f4f6;
  --panel: #ffffff;
  --panel-2: #f7f7f8;
  --frame: #d9d9d9;
  --text: #111827;
  --muted: #6b7280;
  --green: #3db23d;
  --aqua: #4ba8ff;
  --accent: #0b8043;
  --border: #e5e7eb;
  --shadow: rgba(2,6,23,0.06);
  --pixel: 4px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Press Start 2P', monospace;
  letter-spacing: 0.08em;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.08'/%3E%3C/svg%3E");
  background-size: 220px 220px;
  opacity: 0.04;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 6px,
    rgba(0,0,0,0.02) 6px,
    rgba(0,0,0,0.03) 8px
  );
  pointer-events: none;
  z-index: 1;
}

body,
button,
a {
  image-rendering: pixelated;
}

.dsi-frame {
  position: fixed;
  inset: 18px;
  border: 4px solid var(--frame);
  box-shadow: inset 0 2px 0 0 rgba(255,255,255,0.6), 0 0 0 6px rgba(0,0,0,0.02);
  pointer-events: none;
  z-index: 2;
}

.dsi-frame::before,
.dsi-frame::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: var(--panel-2);
  border: 4px solid var(--frame);
}

.dsi-frame::before {
  top: -4px;
  left: -4px;
}

.dsi-frame::after {
  bottom: -4px;
  right: -4px;
}

.corner {
  position: fixed;
  width: 24px;
  height: 24px;
  border-color: var(--frame);
  border-style: solid;
  z-index: 2;
}

.corner-tl { top: 10px; left: 10px; border-width: 6px 0 0 6px; }
.corner-tr { top: 10px; right: 10px; border-width: 6px 6px 0 0; }
.corner-bl { bottom: 10px; left: 10px; border-width: 0 0 6px 6px; }
.corner-br { bottom: 10px; right: 10px; border-width: 0 6px 6px 0; }

.power-dot {
  position: fixed;
  top: 18px;
  right: 22px;
  width: 10px;
  height: 10px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(61, 178, 61, 0.9);
  border: 2px solid #ffffff;
  z-index: 3;
  animation: pulse 2s linear infinite;
}

.ver {
  position: fixed;
  top: 18px;
  left: 22px;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.25em;
  z-index: 3;
}

.status-bar {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.28em;
  z-index: 3;
}

.status-bar span {
  color: var(--green);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.screen-container {
  position: relative;
  z-index: 2;
  max-width: 1240px;
  margin: 90px auto 90px;
  padding: 0 20px;
  display: grid;
  gap: 22px;
}

.screen {
  display: grid;
  gap: 22px;
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 4px solid var(--frame);
  box-shadow: 0 2px 8px var(--shadow);
  padding: 26px;
  min-height: 320px;
}

.page-panel,
.panel {
  display: grid;
  gap: 16px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand-row img {
  width: 112px;
  height: 112px;
  padding: 8px;
  background: var(--panel-2);
  border: 4px solid var(--border);
  object-fit: contain;
}

.page-label {
  margin: 0;
  font-size: 10px;
  letter-spacing: 0.35em;
  color: var(--muted);
}

.page-title {
  margin: 0;
  font-size: clamp(34px, 6vw, 54px);
  letter-spacing: 0.24em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.28em;
}

.menu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 18px;
}

.menu-card,
.top-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  text-decoration: none;
  background: var(--panel-2);
  border: 3px solid var(--border);
  box-shadow: 0 4px 0 rgba(0,0,0,0.04);
  padding: 20px 22px;
  text-align: center;
  letter-spacing: 0.2em;
  transition: transform 0.18s cubic-bezier(.22,1,.36,1), background 0.12s ease, color 0.12s ease;
}

.menu-card:hover,
.menu-card:focus,
.top-nav a:hover,
.top-nav a:focus {
  background: var(--green);
  color: #ffffff;
  transform: translateY(-2px);
}

.menu-card.external::after {
  content: ' ↗';
  font-size: 12px;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.panel {
  background: var(--panel);
  border: 3px solid var(--border);
  padding: 24px;
}

.panel h2 {
  margin: 0;
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: 0.2em;
}

.panel p {
  margin: 0;
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: 0.05em;
  color: #374151;
}

.feature-grid,
.product-grid,
.software-grid,
.info-grid {
  display: grid;
  gap: 16px;
}

.feature-grid,
.product-grid,
.software-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.feature-card,
.product-card,
.software-card,
.info-card {
  background: var(--panel-2);
  border: 2px solid var(--border);
  padding: 18px;
  box-shadow: 0 2px 0 rgba(0,0,0,0.04) inset;
}

.feature-card span,
.product-card span,
.software-card span {
  display: block;
  margin-bottom: 10px;
  color: var(--green);
  letter-spacing: 0.3em;
  font-size: 10px;
}

.feature-card p,
.product-card p,
.software-card p,
.info-card p {
  margin: 0;
  font-size: 11px;
  line-height: 1.7;
  color: #374151;
}

.product-card h3,
.software-card h3,
.info-card h3 {
  margin: 0 0 10px;
  font-size: 14px;
}

.action-pill {
  display: inline-block;
  margin-top: 14px;
  padding: 10px 16px;
  background: var(--green);
  color: #ffffff;
  border: 2px solid rgba(0,0,0,0.06);
  text-decoration: none;
  letter-spacing: 0.2em;
}

@media (max-width: 720px) {
  .screen-container {
    margin: 70px 12px 80px;
  }
  .menu-card,
  .top-nav a {
    padding: 18px;
  }
  .brand-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Carousel (DSi-style bottom selector) */
.carousel-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  justify-content: center;
}
.carousel-btn {
  background: var(--panel-2);
  color: var(--text);
  border: 3px solid var(--border);
  padding: 8px 12px;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 4px 0 rgba(0,0,0,0.04);
  user-select: none;
}
.carousel-btn:active { transform: translate(2px,2px); box-shadow:none; }
.carousel-track {
  display: inline-flex;
  gap: 14px;
  overflow-x: auto;
  padding: 8px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.carousel-track::-webkit-scrollbar { display: none; }
.carousel-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 120px;
  min-width: 120px;
  text-decoration: none;
  color: var(--text);
  scroll-snap-align: center;
  border: 3px solid var(--border);
  padding: 10px;
  background: var(--panel-2);
  box-shadow: 0 6px 0 rgba(0,0,0,0.04);
  transition: transform 220ms cubic-bezier(.22,1,.36,1), box-shadow 220ms, background 120ms;
}
.carousel-item img {
  width: 80px; height: 80px; object-fit: contain; display: block;
  image-rendering: pixelated;
  border: 2px solid var(--border);
  background: #ffffff;
}
.carousel-item .item-title {
  margin-top: 8px;
  font-size: 10px;
  text-align: center;
  color: #374151;
}
.carousel-item.active {
  transform: translateY(-6px) scale(1.06);
  border-color: var(--green);
  box-shadow: 0 8px 18px rgba(61,178,61,0.12), 0 6px 0 rgba(0,0,0,0.06);
}

/* Carousel open button */
.carousel-actions { text-align: center; margin-top: 12px; }
.open-btn { display: none; }
.open-btn.visible { display: inline-block; }
@media (max-width:720px) {
  .carousel-item { width:96px; min-width:96px; }
  .carousel-item img { width:64px;height:64px; }
}