body { font-family: system-ui, sans-serif; background: #101418; color: #e8ecf0; margin: 0; display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.card { background: #1a2129; padding: 2rem; border-radius: 12px; width: 22rem; box-shadow: 0 4px 24px #0008; display: flex; flex-direction: column; gap: .3rem; }
.card[hidden] { display: none; }
h1 { font-size: 1.1rem; margin: 0 0 1rem; }
input, button { width: 100%; box-sizing: border-box; padding: .6rem; margin: .3rem 0; border-radius: 8px; border: 1px solid #33404d; background: #0d1117; color: #e8ecf0; font-size: 1rem; }
button { background: #2f6feb; border: none; cursor: pointer; }
button:hover { background: #3d7ef0; }
button.secondary { background: #2a3441; }
button.danger { background: #8c2f2f; }
.err { color: #ff7b72; font-size: .9rem; min-height: 1.2em; }
.meta { color: #8b98a5; font-size: .85rem; margin-bottom: .6rem; }
.row { display: flex; gap: .5rem; }
body.viewer { display: flex; flex-direction: column; align-items: stretch; }
body.viewer header { display: flex; align-items: center; gap: 1rem; padding: .5rem .9rem; background: #1a2129; border-bottom: 1px solid #33404d; }
body.viewer header h1 { font-size: 1rem; margin: 0; font-weight: 600; }
#stats { font-size: .8rem; color: #8b98a5; margin-left: auto; }
#banner { display: none; padding: .45rem .9rem; font-size: .85rem; }
#banner.warn { display: block; background: #4d3a12; color: #ffd77a; }
#banner.error { display: block; background: #4d1a1a; color: #ff9b92; }
#banner.info { display: block; background: #14324d; color: #8ec7ff; }
body.viewer main { flex: 1; display: flex; align-items: center; justify-content: center; padding: .8rem; }
canvas { background: #000; max-width: 100%; max-height: calc(100vh - 7rem); border-radius: 6px; outline: none; cursor: crosshair; }

body.viewer header button { width: 2.4rem; margin: 0; padding: .35rem 0; flex: none; }
body.viewer header button.on { background: #2f6feb; }
#navform { flex: 1; min-width: 0; margin: 0; }
#navform input { margin: 0; padding: .4rem .6rem; font-size: 16px; }
#stats { white-space: nowrap; }
.typer { position: fixed; left: 0; bottom: 0; width: 1px; height: 1px; opacity: 0; border: 0; padding: 0; resize: none; font-size: 16px; }
canvas { touch-action: none; }
@media (max-width: 600px) { #stats { display: none; } body.viewer main { padding: .3rem; } canvas { max-height: calc(100vh - 4rem); } }