/* Shared UI for the construction simulations */
:root {
  --bg: #0f151b; --panel: rgba(16, 22, 29, .74); --line: rgba(255, 255, 255, .12);
  --text: #eef3f7; --mut: #9fb0bf; --accent: #ffb703; --ok: #4ade80; --bad: #ff6b6b; --blue: #5eb1ff;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: var(--bg); color: var(--text); }
canvas#c { position: fixed; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; cursor: grab; outline: none; }
canvas#c:active { cursor: grabbing; }
[hidden] { display: none !important; }
button, select { font: inherit; color: inherit; cursor: pointer; }
button:focus-visible, select:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.ui { position: fixed; inset: 0; pointer-events: none; }
.ui > * { pointer-events: none; }
.panel, #top, .timeline, .btns, #toast, .dock { pointer-events: auto; }
.panel { background: var(--panel); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--line); border-radius: 14px; }

#top { position: absolute; top: 10px; left: 10px; right: 10px; display: flex; align-items: center; gap: 14px; padding: 8px 12px; background: var(--panel); backdrop-filter: blur(12px); border: 1px solid var(--line); border-radius: 14px; }
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand a { color: inherit; text-decoration: none; display: flex; align-items: center; gap: 10px; }
.logo { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, #ffb703, #fb8500); font-size: 20px; color: #1b1300; flex: none; }
.brand b { display: block; font-size: 16px; letter-spacing: .01em; }
.brand small { color: var(--mut); font-size: 11px; }
.chips { display: flex; gap: 8px; margin-left: auto; flex-wrap: wrap; justify-content: flex-end; }
.chip { min-width: 84px; padding: 4px 12px; border-radius: 10px; background: rgba(255, 255, 255, .06); text-align: center; }
.chip small { display: block; color: var(--mut); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.chip b { font-size: 17px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.btns { display: flex; gap: 6px; }
.ghost { background: rgba(255, 255, 255, .07); border: 1px solid var(--line); border-radius: 10px; padding: 7px 11px; transition: background .15s; white-space: nowrap; }
.ghost:hover { background: rgba(255, 255, 255, .16); }
.ghost.on { background: rgba(255, 183, 3, .22); border-color: rgba(255, 183, 3, .6); }
.primary { background: linear-gradient(135deg, #ffb703, #fb8500); color: #1b1300; font-weight: 700; border: 0; border-radius: 12px; padding: 12px 28px; font-size: 16px; box-shadow: 0 6px 22px rgba(251, 133, 0, .35); }
.primary:hover { filter: brightness(1.08); }

/* left side panel */
.side { position: absolute; left: 10px; top: 74px; width: 268px; padding: 12px 14px; display: flex; flex-direction: column; gap: 10px; max-height: calc(100% - 190px); overflow: auto; }
.side h3 { margin: 0 0 2px; font-size: 12px; text-transform: uppercase; letter-spacing: .1em; color: var(--mut); font-weight: 600; }
.side .row { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 13px; }
.side .row span { color: var(--mut); }
.side .row b { font-variant-numeric: tabular-nums; }
.side .seg { display: flex; gap: 4px; }
.side .seg button { flex: 1; padding: 6px 4px; font-size: 12px; }
.bar { height: 8px; border-radius: 99px; background: rgba(255, 255, 255, .1); overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, #ffb703, #fb8500); border-radius: 99px; }
.slider { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--mut); }
.slider div { display: flex; justify-content: space-between; }
.slider b { color: var(--text); font-weight: 600; }
input[type=range] { width: 100%; accent-color: var(--accent); background: transparent; }
.kv { display: grid; grid-template-columns: 1fr auto; gap: 3px 10px; font-size: 13px; margin: 0; }
.kv dt { color: var(--mut); } .kv dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.hr { height: 1px; background: var(--line); margin: 2px 0; }
.tip { font-size: 12px; color: var(--mut); line-height: 1.45; margin: 0; }
.tip kbd { background: rgba(255, 255, 255, .12); border-radius: 5px; padding: 1px 6px; font: 600 11px ui-monospace, monospace; color: var(--text); }

/* bottom dock: timeline */
.dock { position: absolute; left: 10px; right: 10px; bottom: 10px; }
.timeline { display: flex; align-items: center; gap: 12px; padding: 10px 12px; background: var(--panel); backdrop-filter: blur(12px); border: 1px solid var(--line); border-radius: 14px; }
.tl-play, .tl-restart { width: 40px; height: 40px; flex: none; border-radius: 50%; border: 1px solid var(--line); background: rgba(255, 255, 255, .08); font-size: 15px; }
.tl-play:hover, .tl-restart:hover { background: rgba(255, 255, 255, .18); }
.tl-track { position: relative; flex: 1; height: 44px; min-width: 0; }
.tl-phases { position: absolute; left: 0; right: 0; top: 0; height: 26px; }
.tl-phase { position: absolute; top: 0; height: 26px; border: 0; padding: 0 6px; background: color-mix(in srgb, var(--c) 28%, transparent); border-right: 2px solid var(--bg); color: var(--mut); font-size: 11px; text-align: left; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; transition: background .2s, color .2s; }
.tl-phase:first-child { border-radius: 8px 0 0 8px; } .tl-phase:last-child { border-radius: 0 8px 8px 0; border-right: 0; }
.tl-phase:hover { background: color-mix(in srgb, var(--c) 50%, transparent); }
.tl-phase.on { background: color-mix(in srgb, var(--c) 70%, transparent); color: #fff; font-weight: 600; }
.tl-phase span { pointer-events: none; }
.tl-track input { position: absolute; left: 0; right: 0; bottom: 0; margin: 0; height: 18px; }
.tl-clock { position: absolute; right: 2px; top: -16px; font-size: 11px; color: var(--mut); font-variant-numeric: tabular-nums; }
.tl-speed { font-size: 12px; color: var(--mut); display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.tl-speed select { background: rgba(255, 255, 255, .08); border: 1px solid var(--line); border-radius: 8px; padding: 5px 6px; color: var(--text); }
.tl-speed select option { color: #111; }

#phaseInfo { position: absolute; left: 50%; transform: translateX(-50%); top: 74px; padding: 8px 18px; text-align: center; max-width: min(560px, calc(100% - 640px)); }
#phaseInfo b { display: block; font-size: 15px; } #phaseInfo span { color: var(--mut); font-size: 12px; }
#toast { position: absolute; left: 50%; bottom: 100px; transform: translate(-50%, 20px); opacity: 0; transition: opacity .3s, transform .3s; padding: 10px 18px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; text-align: center; pointer-events: none; }
#toast.show { opacity: 1; transform: translate(-50%, 0); }
#toast b { display: block; } #toast span { color: var(--mut); font-size: 12px; }
#fps { position: absolute; right: 14px; top: 76px; font-size: 11px; color: var(--mut); }

/* overlays */
.overlay { position: fixed; inset: 0; display: grid; place-items: center; background: radial-gradient(ellipse at center, rgba(8, 12, 18, .6), rgba(8, 12, 18, .92)); z-index: 5; transition: opacity .5s, visibility .5s; padding: 16px; }
.overlay.done { opacity: 0; visibility: hidden; pointer-events: none; }
.card { max-width: 560px; width: 100%; padding: 28px 30px; text-align: center; background: rgba(20, 28, 38, .9); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 20px 80px rgba(0, 0, 0, .5); }
.card h1 { margin: 6px 0 2px; font-size: 30px; letter-spacing: .01em; }
.card .sub { color: var(--accent); margin: 0 0 14px; font-weight: 600; }
.card p { color: #c6d2dc; line-height: 1.55; margin: 8px 0; }
.card .feat { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; text-align: left; margin: 14px 0 18px; font-size: 13px; color: var(--mut); }
.card .feat div::before { content: "▸ "; color: var(--accent); }
.card .hint { font-size: 12px; color: var(--mut); margin-top: 14px; }
.logo.big { width: 66px; height: 66px; font-size: 36px; border-radius: 20px; margin: 0 auto 8px; }
#loading { z-index: 9; background: var(--bg); } #loading .spin { width: 42px; height: 42px; border-radius: 50%; border: 4px solid rgba(255, 255, 255, .15); border-top-color: var(--accent); animation: sp 1s linear infinite; margin: 0 auto 12px; }
@keyframes sp { to { transform: rotate(360deg); } }
#loading p { color: var(--mut); text-align: center; }

@media (max-width: 1100px) { #phaseInfo { display: none; } }
#btnPanel { display: none; }
@media (max-width: 760px) {
  #btnPanel { display: inline-block; }
  .side { display: none; width: calc(100% - 20px); max-height: 52%; }
  .side.open { display: flex; }
  .chips .chip:nth-child(n+3) { display: none; }
  .brand b { font-size: 14px; }
  .side { width: 200px; top: 66px; padding: 8px 10px; max-height: 40%; }
  .chip { min-width: 64px; padding: 3px 8px; } .chip b { font-size: 14px; }
  .brand small, .tl-speed { display: none; }
  .btns .ghost { padding: 6px 8px; }
  #top { gap: 8px; flex-wrap: wrap; }
}