* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: #050816;
  color: rgba(248, 250, 252, 0.96);
}

body {
  min-height: 100vh;
  margin: 0;
  padding: clamp(14px, 3vw, 28px);
  background:
    radial-gradient(circle at 12% -8%, rgba(34, 211, 238, 0.15), transparent 32rem),
    radial-gradient(circle at 92% 16%, rgba(99, 102, 241, 0.12), transparent 28rem),
    radial-gradient(circle at 1px 1px, rgba(148, 163, 184, 0.1) 1px, transparent 1.1px),
    #050816;
  background-size: auto, auto, 22px 22px, auto;
}

.container {
  width: min(1120px, 100%);
  margin: 20px auto;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 30px;
  background:
    radial-gradient(circle at 8% 0%, rgba(103, 232, 249, 0.1), transparent 42%),
    rgba(12, 19, 35, 0.9);
  box-shadow: 0 30px 70px rgba(2, 8, 23, 0.45);
  backdrop-filter: blur(18px);
}

.back-link {
  display: inline-flex;
  margin-bottom: 24px;
  color: #67e8f9;
  font-weight: 750;
  text-decoration: none;
}

h1,
h2 {
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

section {
  margin-top: 28px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: rgba(226, 232, 240, 0.88);
  font-weight: 750;
}

input {
  width: 100%;
  margin-bottom: 14px;
  padding: 13px 15px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 14px;
  outline: none;
  background: rgba(2, 8, 23, 0.5);
  color: rgba(248, 250, 252, 0.96);
  font: inherit;
  font-size: 1rem;
}

input:focus {
  border-color: rgba(103, 232, 249, 0.58);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.08);
}

button {
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid rgba(103, 232, 249, 0.42);
  border-radius: 13px;
  background: linear-gradient(135deg, rgba(8, 145, 178, 0.88), rgba(37, 99, 235, 0.8));
  color: #ecfeff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.14s ease, box-shadow 0.14s ease;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(8, 145, 178, 0.28);
}

.output {
  min-height: 64px;
  padding: 16px;
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 16px;
  background: rgba(2, 8, 23, 0.46);
  color: rgba(207, 250, 254, 0.92);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  word-break: break-all;
  line-height: 1.7;
}

canvas {
  width: 100%;
  height: 300px;
  border: 1px solid rgba(103, 232, 249, 0.2);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 16px 38px rgba(2, 8, 23, 0.28);
}

.signal-header { display:flex;align-items:end;justify-content:space-between;gap:24px;padding-bottom:28px;border-bottom:1px solid rgba(148,163,184,.13); }
.signal-header>div:first-child { max-width:760px; }
.signal-header p:last-child { margin:14px 0 0;color:rgba(166,181,204,.86);line-height:1.7; }
.signal-kicker { margin:0 0 8px!important;color:rgba(103,232,249,.72)!important;font-size:.72rem;font-weight:850;letter-spacing:.15em;text-transform:uppercase; }
.signal-header h1 { margin:0;font-size:clamp(2.5rem,6vw,4.8rem);letter-spacing:-.055em;line-height:1; }
.signal-header h1 span { color:transparent;background:linear-gradient(90deg,#67e8f9,#818cf8);background-clip:text;-webkit-background-clip:text; }
.signal-chip { padding:9px 12px;border:1px solid rgba(103,232,249,.2);border-radius:999px;background:rgba(103,232,249,.06);color:#a5f3fc;font-family:ui-monospace,monospace;font-size:.73rem;font-weight:800;white-space:nowrap; }
.signal-input { padding:22px;border:1px solid rgba(148,163,184,.14);border-radius:20px;background:rgba(2,8,23,.28); }
.signal-input__row { display:flex;gap:10px; }
.signal-input__row input { margin:0; }
.signal-input__row button { flex:0 0 auto; }
.section-title { display:flex;align-items:center;gap:11px;margin-bottom:14px; }
.section-title span { width:28px;height:28px;display:grid;place-items:center;border:1px solid rgba(103,232,249,.2);border-radius:9px;background:rgba(103,232,249,.07);color:#a5f3fc;font:800 .68rem ui-monospace,monospace; }
.section-title h2 { margin:0; }

@media(max-width:680px){.signal-header{align-items:start;flex-direction:column}.signal-input__row{flex-direction:column}.signal-input__row button{width:100%}}