:root {
  --bg: #142018;
  --card: #1e3226;
  --ink: #e6f0e4;
  --dim: #8aa190;
  --line: #2f4a38;
  --accent: #6fcf7a;
  --accent2: #c9a227;
  --warn: #e07a5f;
  --ok: #6fcf7a;
  --pad0: #3d7ea6;
  --pad1: #c9a227;
  --pad2: #6fcf7a;
  --pad3: #e07a5f;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100dvh;
  font: 16px/1.45 var(--font);
  color: var(--ink);
  background: radial-gradient(120% 80% at 50% -10%, #24382c, var(--bg));
}

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 5; background: #fff; color: #000; padding: .5rem; }

.device {
  width: min(26rem, 100%);
  margin: 0 auto;
  min-height: 100dvh;
  padding: 1rem 1rem 1.25rem;
  display: flex;
  flex-direction: column;
}

.bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line);
}
.brand {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.sub { margin: .15rem 0 0; color: var(--dim); font-size: .82rem; font-family: var(--mono); }

.pips { display: flex; gap: .35rem; padding-top: .2rem; }
.pips i {
  width: .7rem; height: .7rem; border-radius: 50%;
  border: 1px solid var(--line); background: #0f1812; display: block;
}
.pips i.on {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(111, 207, 122, .55);
}

.screen { animation: in .25s ease; }
@keyframes in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.step {
  margin: 0 0 .35rem;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--accent2);
  letter-spacing: .04em;
  text-transform: uppercase;
}
h1 {
  margin: 0 0 .55rem;
  font-size: 1.45rem;
  letter-spacing: .02em;
}
p { margin: 0 0 .9rem; }
.dim { color: var(--dim); font-size: .95rem; }

.mods {
  display: flex; gap: .4rem; list-style: none;
  margin: 0 0 1.2rem; padding: 0;
}
.mods li {
  flex: 1; text-align: center; font-size: .8rem;
  padding: .45rem .2rem; border: 1px solid var(--line);
  border-radius: 8px; color: var(--dim); background: var(--card);
}

.btn {
  appearance: none; border: 0; width: 100%;
  border-radius: 10px; padding: .85rem 1rem;
  font: inherit; font-weight: 700; cursor: pointer;
  background: var(--accent); color: #102016;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-ghost {
  margin-top: .5rem; background: transparent; color: var(--dim);
  border: 1px solid var(--line);
}

input[type="text"] {
  width: 100%; margin-bottom: .55rem; padding: .9rem .85rem;
  border-radius: 10px; border: 1px solid var(--line);
  background: #0f1812; color: var(--ink);
  font: 1.1rem/1.2 var(--mono); letter-spacing: .08em; text-align: center;
}

.msg {
  min-height: 1.2rem; margin: .45rem 0 .2rem;
  font-size: .9rem; color: var(--dim);
}
.msg.err { color: var(--warn); }
.msg.ok { color: var(--ok); }

.score {
  font-family: var(--mono); color: var(--dim); margin: .35rem 0 .75rem;
}

.pads {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: .65rem; margin: .8rem 0;
}
.pad {
  aspect-ratio: 1; border: 0; border-radius: 16px; cursor: pointer;
  opacity: .72; transition: opacity .1s, transform .1s, box-shadow .1s;
}
.pad:nth-child(1) { background: var(--pad0); }
.pad:nth-child(2) { background: var(--pad1); }
.pad:nth-child(3) { background: var(--pad2); }
.pad:nth-child(4) { background: var(--pad3); }
.pad.on, .pad:active {
  opacity: 1; transform: scale(.96);
  box-shadow: 0 0 0 3px rgba(230, 240, 228, .25);
}
.pad:disabled { cursor: default; }

.pipe-meta {
  display: flex; justify-content: space-between; color: var(--dim);
  font-size: .75rem; font-family: var(--mono);
  margin-bottom: .35rem; padding: 0 .15rem;
  max-width: 20rem; margin-left: auto; margin-right: auto;
}
.pipes {
  display: grid; gap: .35rem; margin: 0 auto .8rem; max-width: 20rem;
}
.pipes-4 { grid-template-columns: repeat(4, 1fr); }
.pipes-5 {
  grid-template-columns: repeat(5, 1fr);
  max-width: 22rem;
}
.pipe-meta { max-width: 22rem; }
.pipe {
  aspect-ratio: 1; border-radius: 10px; border: 1px solid var(--line);
  background: #0f1812; padding: 0; cursor: pointer;
}
.pipe svg { width: 100%; height: 100%; display: block; }
.pipe.flow {
  border-color: var(--accent);
  box-shadow: inset 0 0 12px rgba(111, 207, 122, .25);
}
.pipe:disabled { cursor: default; }


.tip {
  padding: .8rem .85rem; border-radius: 10px;
  background: var(--card); border: 1px solid var(--line);
  margin-bottom: .65rem;
}
.tip.big { margin-bottom: 1rem; border-color: rgba(111, 207, 122, .35); }
.tip strong {
  display: block; margin-bottom: .35rem; color: var(--accent);
  font-size: .82rem; text-transform: uppercase; letter-spacing: .05em;
}
.tip p { margin: 0; color: var(--ink); font-size: 1.02rem; }
.tip-stack { margin-bottom: 1rem; }
.dimtip { opacity: .85; }
.dimtip p { font-size: .92rem; color: var(--dim); }

.foot {
  margin-top: auto; padding-top: 1.25rem;
  display: flex; justify-content: space-between; gap: .5rem;
  color: var(--dim); font-size: .78rem;
}
.foot a { color: var(--accent); }