:root {
  --bg: #05060a; --neon: #00f0ff; --neon2: #ff2ec4; --gold: #ffcf3a;
  --green: #39ff88; --dim: #5a6a8a; --font: "Courier New", ui-monospace, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: #cfe7ff; font-family: var(--font); -webkit-font-smoothing: none; min-height: 100vh; }

#crt { position: relative; min-height: 100vh; }
#crt::after {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 100;
  background: repeating-linear-gradient(to bottom, rgba(0,0,0,0) 0px, rgba(0,0,0,0) 2px, rgba(0,0,0,0.16) 3px, rgba(0,0,0,0.16) 4px);
}
#crt::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 99;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.65) 100%);
}
a { color: inherit; text-decoration: none; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: calc(16px + env(safe-area-inset-top, 0px)) calc(24px + env(safe-area-inset-right, 0px)) 16px calc(24px + env(safe-area-inset-left, 0px));
  border-bottom: 1px solid rgba(0,240,255,0.15);
}
.wordmark { font-weight: 900; letter-spacing: 3px; color: var(--neon); text-shadow: 0 0 8px var(--neon); }
.wordmark span { color: var(--neon2); text-shadow: 0 0 8px var(--neon2); }
.topbar nav { display: flex; gap: 10px; }
.topbar nav a {
  border: 1px solid var(--green); color: var(--green); padding: 6px 16px;
  letter-spacing: 2px; text-shadow: 0 0 6px var(--green); transition: all .12s; font-size: 13px;
}
.topbar nav a:hover { background: var(--green); color: #001016; }

.metro-page {
  max-width: 520px; margin: 0 auto; padding: 40px 20px;
  display: flex; flex-direction: column; align-items: center; gap: 22px; text-align: center;
}
.logo {
  font-size: clamp(40px, 9vw, 64px); font-weight: 900; letter-spacing: 5px;
  color: var(--neon); text-shadow: 0 0 10px var(--neon), 0 0 28px var(--neon);
}
.sub { color: var(--gold); letter-spacing: 3px; text-transform: uppercase; font-size: 12px; }

/* tempo readout */
.bpm { font-size: clamp(72px, 22vw, 120px); font-weight: 900; line-height: .9; color: var(--neon); text-shadow: 0 0 16px var(--neon); }
.bpm small { font-size: 20px; color: var(--dim); letter-spacing: 3px; text-shadow: none; }
.term { color: var(--gold); letter-spacing: 3px; text-transform: uppercase; font-size: 13px; min-height: 16px; }

/* beat dots */
.beats { display: flex; gap: 14px; justify-content: center; min-height: 26px; }
.beat-dot { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--dim); transition: all .05s; }
.beat-dot.on { background: var(--neon); border-color: var(--neon); box-shadow: 0 0 16px var(--neon); }
.beat-dot.downbeat.on { background: var(--gold); border-color: var(--gold); box-shadow: 0 0 18px var(--gold); }

/* controls */
.row { display: flex; align-items: center; gap: 12px; justify-content: center; flex-wrap: wrap; }
.tempo-row input[type=range] { width: min(280px, 70vw); accent-color: var(--neon); }
.rbtn {
  font-family: var(--font); background: transparent; border: 1px solid var(--neon); color: var(--neon);
  width: 46px; height: 46px; font-size: 24px; cursor: pointer; text-shadow: 0 0 6px var(--neon);
}
.rbtn:hover { background: var(--neon); color: #001016; }
.field-label { color: var(--dim); letter-spacing: 2px; font-size: 12px; }
.seg { display: inline-flex; border: 1px solid rgba(0,240,255,0.3); }
.seg button {
  font-family: var(--font); background: transparent; color: var(--dim); border: none;
  padding: 8px 16px; letter-spacing: 1px; cursor: pointer; font-size: 14px;
}
.seg button + button { border-left: 1px solid rgba(0,240,255,0.3); }
.seg button.on { background: var(--neon); color: #001016; }
.btn {
  font-family: var(--font); background: transparent; border: 2px solid var(--green); color: var(--green);
  padding: 14px 36px; letter-spacing: 3px; font-weight: bold; font-size: 18px; cursor: pointer;
  text-shadow: 0 0 8px var(--green); transition: all .12s;
}
.btn:hover { background: var(--green); color: #001016; box-shadow: 0 0 22px var(--green); }
.btn.tap { border-color: var(--gold); color: var(--gold); text-shadow: 0 0 8px var(--gold); padding: 12px 24px; font-size: 15px; }
.btn.tap:hover { background: var(--gold); color: #001016; box-shadow: 0 0 18px var(--gold); }
.hint { color: var(--dim); font-size: 12px; max-width: 420px; line-height: 1.5; }