:root { color-scheme: dark; --page: #101114; --ink: #e8e8ec; --dim: #8a8d96; --amber: #ffa500; --body1: #34363c; --body2: #1f2024; }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--page); color: var(--ink); }
body { min-height: 100svh; font: 14px/1.55 -apple-system, "Hiragino Sans", "Yu Gothic", system-ui, sans-serif; }
button { font: inherit; touch-action: manipulation; }
.page { width: min(100%, 820px); margin: auto; padding: max(14px, env(safe-area-inset-top)) 12px max(28px, env(safe-area-inset-bottom)); }
h1 { font-size: 18px; margin: 0 0 2px; letter-spacing: .04em; }
h1 small { color: var(--dim); font-weight: 400; margin-left: 8px; }
.lead { color: var(--dim); margin: 0 0 14px; font-size: 13px; }

.device { background: linear-gradient(160deg, var(--body1), var(--body2)); border-radius: 22px; padding: 18px;
  box-shadow: 0 18px 40px rgba(0,0,0,.55), inset 0 1px 0 rgba(255,255,255,.08); }
.bezel { background: #000; border-radius: 10px; padding: 10px; box-shadow: inset 0 0 0 2px #0a0a0c, inset 0 2px 8px rgba(0,0,0,.9); }
#lcd { display: block; width: 100%; aspect-ratio: 240 / 135; image-rendering: pixelated; image-rendering: crisp-edges; background: #000; cursor: pointer; }
.device.drop { outline: 2px dashed var(--amber); outline-offset: 4px; }
.device .brand { display: flex; justify-content: space-between; margin-top: 10px; color: #6d7079; font-size: 11px; letter-spacing: .12em; }

.control-panel { margin-top: 16px; padding: 14px 16px; border: 1px solid #2a2c33; border-radius: 14px; background: #16171b; }
.control-panel h2 { margin: 0 0 4px; font-size: 13px; letter-spacing: .1em; color: var(--amber); }
.control-panel p { margin: 0 0 10px; color: var(--dim); font-size: 12.5px; }
.control-panel p b { color: var(--ink); font-weight: 600; }
.primary { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.power { display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px; border-radius: 999px; border: 1px solid #3a3d46; background: #23252b; color: var(--ink); cursor: pointer; }
.power span { width: 10px; height: 10px; border-radius: 50%; background: #55585f; }
.power[aria-pressed="true"] { border-color: var(--amber); } .power[aria-pressed="true"] span { background: #28eb5a; box-shadow: 0 0 8px #28eb5a; }
#msg { color: var(--dim); font-size: 12.5px; min-height: 20px; margin-top: 10px; }
.notes { margin: 8px 0 0; padding-left: 18px; color: var(--dim); font-size: 12px; }

.group { margin: 12px 0 6px; font-size: 12px; color: var(--dim); letter-spacing: .08em; }
.key-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px 14px; }
.key-grid > div { display: flex; align-items: center; gap: 10px; }
.key-grid span { font-size: 13px; }
.key-grid button { flex: 0 0 76px; height: 34px; border-radius: 7px; border: 1px solid #3a3d46; color: var(--amber);
  background: linear-gradient(#34363d, #2b2d33); box-shadow: 0 2px 0 #0e0f11; font: 700 12px/1 ui-monospace, Menlo, monospace; cursor: pointer; }
.key-grid button.on, .key-grid button:active { background: var(--amber); color: #201400; transform: translateY(1px); box-shadow: 0 1px 0 #0e0f11; }
.key-grid button.dis { opacity: .45; }
.foot { margin-top: 14px; color: var(--dim); font-size: 12px; }
@media (max-width: 520px) { .device { padding: 12px; border-radius: 16px; } }
.btn { background: #23252b; color: var(--ink); border: 1px solid #3a3d46; border-radius: 999px; padding: 10px 16px; cursor: pointer; }
.btn:hover { background: #2c2f37; } .btn.act { border-color: var(--amber); color: var(--amber); }
.key-grid button[data-hold] { flex-basis: 96px; }
.top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.langs { display: flex; gap: 6px; } .langs button { background: #23252b; color: var(--dim); border: 1px solid #3a3d46; border-radius: 999px; padding: 3px 12px; cursor: pointer; font-size: 12px; }
.langs button.act { color: var(--amber); border-color: var(--amber); }
html[data-lang="ja"] [lang="en"], html[data-lang="en"] [lang="ja"] { display: none; }
.key-grid button small { font-size: 9px; }
.hl { color: var(--amber); font-weight: 700; }
.notice .notes { margin: 0; color: var(--ink); } .notice .notes b { color: var(--amber); font-weight: 600; }

/* Full screen: the screen fills the display at its own proportions. */
#lcd:fullscreen { width: 100vw; height: 100vh; aspect-ratio: auto; object-fit: contain; background: #000; }
.quick { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; align-items: center; margin: 0 0 12px; }
.quick #msg { flex-basis: 100%; text-align: center; margin-top: 0; }
.quick .btn { border-radius: 999px; } .kk { color: var(--amber); font: 700 12px/1 ui-monospace, Menlo, monospace; margin-right: 4px; }
.quick .btn.on, .quick .btn:active { background: var(--amber); color: #201400; } .quick .btn.on .kk, .quick .btn:active .kk { color: #201400; }
.fnnote { margin: -8px 0 12px; font-size: 13.5px; }