/* ==========================================================================
   styles.css — dark workshop UI around the canvas.
   Layout: header / canvas / controls / stage tracker. The canvas keeps the
   machine's 4:3 aspect and scales with the viewport; below 900px the tracker
   drops underneath the machine.
   ========================================================================== */

:root {
  --bg: #070910;
  --bg-soft: #0e1320;
  --panel: #131a2b;
  --panel-2: #182135;
  --line: #24304a;
  --text: #e8eefc;
  --muted: #8d9bb8;
  --accent: #63e0ff;
  --accent-2: #ffd166;
  --good: #7cf5a0;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    radial-gradient(1100px 620px at 22% -8%, rgba(99, 224, 255, 0.10), transparent 62%),
    radial-gradient(900px 560px at 92% 4%, rgba(255, 209, 102, 0.08), transparent 60%),
    radial-gradient(1000px 700px at 50% 118%, rgba(124, 245, 160, 0.07), transparent 62%),
    var(--bg);
}

.app {
  max-width: 1440px;
  margin: 0 auto;
  padding: 22px clamp(14px, 2.4vw, 30px) 34px;
}

/* -------------------------------------------------------------- header -- */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand h1 {
  margin: 0;
  font-size: clamp(19px, 2.3vw, 27px);
  font-weight: 650;
  letter-spacing: -0.015em;
}

.brand .sub {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13.5px;
}

/* small spinning gear as the logo */
.gear {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, var(--bg-soft) 0 8px, transparent 8px),
    conic-gradient(from 0deg,
      var(--accent) 0 12deg, transparent 12deg 45deg,
      var(--accent) 45deg 57deg, transparent 57deg 90deg,
      var(--accent) 90deg 102deg, transparent 102deg 135deg,
      var(--accent) 135deg 147deg, transparent 147deg 180deg,
      var(--accent) 180deg 192deg, transparent 192deg 225deg,
      var(--accent) 225deg 237deg, transparent 237deg 270deg,
      var(--accent) 270deg 282deg, transparent 282deg 315deg,
      var(--accent) 315deg 327deg, transparent 327deg 360deg);
  box-shadow: 0 0 22px rgba(99, 224, 255, 0.35);
  animation: spin 9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.clock {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  min-width: 118px;
}

.clock .label {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.clock span:last-child {
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  font-weight: 600;
  color: var(--accent);
}

/* --------------------------------------------------------------- board -- */

.board {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  grid-template-areas:
    "canvas panel"
    "controls panel";
  gap: 14px;
  align-items: start;
}

.canvas-wrap {
  grid-area: canvas;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #05070d;
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 3;
}

#stage {
  display: block;
  width: 100%;
  height: 100%;
}

.banner {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translate(-50%, 14px);
  padding: 9px 18px;
  border-radius: 999px;
  background: rgba(9, 13, 22, 0.86);
  border: 1px solid rgba(99, 224, 255, 0.35);
  color: var(--text);
  font-size: 13.5px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
  backdrop-filter: blur(6px);
}

.banner.show { opacity: 1; transform: translate(-50%, 0); }

.progress {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.07);
}

.progress .bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--good));
  box-shadow: 0 0 12px rgba(99, 224, 255, 0.7);
  transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ------------------------------------------------------------ controls -- */

.controls {
  grid-area: controls;
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  box-shadow: var(--shadow);
}

.controls .spacer { flex: 1 1 auto; }

button {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 16px;
  background: linear-gradient(180deg, #1d273d, #141b2b);
  color: var(--text);
  font: inherit;
  font-weight: 550;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.18s ease,
              background 0.18s ease, box-shadow 0.18s ease;
}

button:hover:not(:disabled) {
  border-color: rgba(99, 224, 255, 0.55);
  transform: translateY(-1px);
}

button:active:not(:disabled) { transform: translateY(0) scale(0.985); }

button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.42;
  cursor: default;
}

button.primary {
  background: linear-gradient(180deg, #2b8fb8, #17627f);
  border-color: rgba(99, 224, 255, 0.5);
  color: #f2fbff;
  box-shadow: 0 0 0 1px rgba(99, 224, 255, 0.12),
              0 8px 22px rgba(23, 98, 127, 0.45);
}

button.primary:hover:not(:disabled) { background: linear-gradient(180deg, #34a6d3, #1a7396); }

button.on {
  border-color: rgba(124, 245, 160, 0.55);
  box-shadow: inset 0 0 0 1px rgba(124, 245, 160, 0.22);
  color: #d7ffe6;
}

/* --------------------------------------------------------------- panel -- */

.panel {
  grid-area: panel;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  box-shadow: var(--shadow);
  padding: 14px 14px 12px;
  max-height: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line);
}

.panel-head h2 {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 650;
}

#stage-now {
  font-size: 12.5px;
  color: var(--accent);
  text-align: right;
  font-weight: 550;
}

.stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stage {
  display: flex;
  gap: 10px;
  padding: 8px 9px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  transition: background 0.25s ease, border-color 0.25s ease, opacity 0.25s ease;
  opacity: 0.55;
}

.stage .num {
  flex: 0 0 auto;
  width: 21px; height: 21px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  background: #202b42;
  color: var(--muted);
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.stage .txt { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.stage .txt b { font-size: 13px; font-weight: 600; }
.stage .txt i {
  font-style: normal;
  font-size: 11.5px;
  line-height: 1.42;
  color: var(--muted);
}

.stage.active {
  opacity: 1;
  border-color: rgba(99, 224, 255, 0.45);
  background: rgba(99, 224, 255, 0.08);
}

.stage.active .num {
  background: var(--accent);
  color: #05202b;
  box-shadow: 0 0 14px rgba(99, 224, 255, 0.6);
}

.stage.done {
  opacity: 1;
  border-color: rgba(124, 245, 160, 0.28);
  background: rgba(124, 245, 160, 0.06);
}

.stage.done .num {
  background: var(--good);
  color: #04281a;
}

.stage.done .txt b::after {
  content: " ✓";
  color: var(--good);
}

.hint {
  margin: 2px 0 0;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 9px;
}

kbd {
  display: inline-block;
  padding: 0 5px;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: #0e1420;
  font: inherit;
  font-size: 11px;
  color: #c9d5ee;
}

/* --------------------------------------------------------------- modes -- */

body[data-mode="complete"] .banner {
  border-color: rgba(124, 245, 160, 0.55);
  box-shadow: 0 0 26px rgba(124, 245, 160, 0.25);
}

body[data-mode="running"] .gear { animation-duration: 3.2s; }

/* ------------------------------------------------------------ responsive */

@media (max-width: 980px) {
  .board {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "canvas"
      "controls"
      "panel";
  }

  .panel { max-height: none; }

  .stages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }
}

@media (max-width: 620px) {
  .app { padding: 14px 12px 26px; }

  .top { flex-direction: column; align-items: flex-start; gap: 10px; }
  .clock { align-items: flex-start; }

  .controls { gap: 7px; }
  button { padding: 9px 13px; font-size: 13.5px; flex: 1 1 auto; }
  .controls .spacer { display: none; }

  .banner { font-size: 12.5px; padding: 8px 14px; white-space: normal; max-width: 88%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .gear { animation: none; }
  button, .banner, .progress .bar { transition: none; }
}