/* Echo — strona publiczna. Tożsamość wspólna z panelem: kolor niesie kanał. */

:root {
  --void: #0b0e14;
  --panel: #11151d;
  --panel-2: #151a24;
  --line: #1e2533;
  --line-2: #2a3346;
  --text: #dde3ee;
  --dim: #8a97ad;
  --dimmer: #5b6780;

  --mail: #4cc2ff;
  --sms: #f0a72b;
  --pay: #b07cff;
  --ok: #3dd68c;
  --bad: #ff6b6b;

  --mono: ui-monospace, "JetBrains Mono", "Cascadia Mono", "SF Mono", Consolas, monospace;
  --sans: "Inter", -apple-system, "Segoe UI", Roboto, ui-sans-serif, sans-serif;

  --wrap: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--void);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; }
:focus-visible { outline: 2px solid var(--mail); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(var(--wrap), calc(100% - 48px)); margin-inline: auto; }

/* ---------- nagłówek ---------- */

.top {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--void) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; gap: 20px; height: 60px; }

.logo { display: flex; align-items: center; gap: 10px; font-weight: 660; letter-spacing: -0.02em; font-size: 18px; }
.logo .dots { display: flex; gap: 4px; }
.logo .dots i { width: 8px; height: 8px; border-radius: 50%; display: block; }
.logo .dots i:nth-child(1) { background: var(--mail); }
.logo .dots i:nth-child(2) { background: var(--sms); }
.logo .dots i:nth-child(3) { background: var(--pay); }

.top nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.top nav a {
  padding: 7px 12px; border-radius: 8px; text-decoration: none;
  color: var(--dim); font-size: 14px;
}
.top nav a:hover { color: var(--text); background: var(--panel-2); }
.top nav a.cta {
  color: var(--void); background: var(--text); font-weight: 600;
}
.top nav a.cta:hover { background: #fff; color: var(--void); }

@media (max-width: 700px) { .top nav a.hide-sm { display: none; } }

/* ---------- hero ---------- */

.hero { padding: 76px 0 60px; }

.eyebrow {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--dimmer); margin: 0 0 18px;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(34px, 6.2vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 680;
  max-width: 16ch;
}
h1 em { font-style: normal; color: var(--mail); }

.lede { margin: 0 0 30px; font-size: clamp(16px, 2.1vw, 19px); color: var(--dim); max-width: 62ch; }
.lede b { color: var(--text); font-weight: 560; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 10px; border: 1px solid var(--line-2);
  background: transparent; color: var(--text); text-decoration: none;
  font-size: 15px; font-weight: 550; cursor: pointer; transition: 0.14s;
}
.btn:hover { border-color: var(--mail); }
.btn.solid { background: var(--text); color: var(--void); border-color: transparent; }
.btn.solid:hover { background: #fff; }

/* ---------- diagram: sygnał wraca ---------- */

.trace { margin: 52px 0 0; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); padding: 8px; }
.trace svg { display: block; width: 100%; height: auto; }

.lane-label { font-family: var(--mono); font-size: 11px; fill: var(--dimmer); letter-spacing: 0.08em; }
.box-label { font-size: 13px; fill: var(--text); font-weight: 560; }
.box-sub { font-family: var(--mono); font-size: 10.5px; fill: var(--dimmer); }
.dead { font-family: var(--mono); font-size: 11px; fill: var(--dimmer); }

.pulse { animation: run 3.4s cubic-bezier(0.55, 0, 0.35, 1) infinite; }
.pulse.b { animation-delay: 0.5s; }
.pulse.c { animation-delay: 1s; }
@keyframes run {
  0%   { transform: translateX(0); opacity: 0; }
  8%   { opacity: 1; }
  46%  { transform: translateX(286px); opacity: 1; }
  56%  { transform: translateX(286px); opacity: 1; }
  92%  { transform: translateX(0); opacity: 1; }
  100% { transform: translateX(0); opacity: 0; }
}

/* ---------- sekcje ---------- */

section { padding: 72px 0; border-top: 1px solid var(--line); }

.sec-head { max-width: 62ch; margin-bottom: 34px; }
.sec-head h2 { margin: 0 0 12px; font-size: clamp(24px, 3.4vw, 33px); letter-spacing: -0.025em; font-weight: 660; }
.sec-head p { margin: 0; color: var(--dim); }

/* karty kanałów */

.channels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .channels { grid-template-columns: 1fr; } }

.ch {
  border: 1px solid var(--line); border-radius: 14px; background: var(--panel);
  padding: 22px; display: flex; flex-direction: column; gap: 14px;
  border-top: 2px solid var(--sig);
}
.ch h3 { margin: 0; font-size: 17px; letter-spacing: -0.015em; font-weight: 620; }
.ch .kind {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--sig);
}
.ch p { margin: 0; color: var(--dim); font-size: 14.5px; flex: 1; }
.ch pre {
  margin: 0; padding: 13px; border-radius: 9px; background: var(--void);
  border: 1px solid var(--line); overflow-x: auto;
  font-family: var(--mono); font-size: 12px; line-height: 1.7; color: var(--text);
}
.ch pre .c { color: var(--dimmer); }
.ch pre .k { color: var(--sig); }

/* kroki */

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; counter-reset: step; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; gap: 20px; } }
.step { counter-increment: step; padding-top: 16px; border-top: 1px solid var(--line-2); }
.step::before {
  content: counter(step, decimal-leading-zero);
  display: block; font-family: var(--mono); font-size: 11.5px;
  color: var(--dimmer); letter-spacing: 0.1em; margin-bottom: 10px;
}
.step h3 { margin: 0 0 7px; font-size: 16.5px; font-weight: 600; letter-spacing: -0.015em; }
.step p { margin: 0; color: var(--dim); font-size: 14.5px; }

/* wierność API */

.facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 800px) { .facts { grid-template-columns: 1fr; } }
.fact {
  border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; background: var(--panel);
}
.fact h4 { margin: 0 0 8px; font-size: 14.5px; font-weight: 600; }
.fact p { margin: 0; color: var(--dim); font-size: 14px; }
.fact code {
  font-family: var(--mono); font-size: 12.5px; color: var(--text);
  background: var(--panel-2); padding: 1px 6px; border-radius: 5px;
}

/* rejestracja */

.signup {
  border: 1px solid var(--line-2); border-radius: 18px; background: var(--panel);
  padding: 36px; display: grid; grid-template-columns: 1.1fr 1fr; gap: 36px; align-items: start;
}
@media (max-width: 880px) { .signup { grid-template-columns: 1fr; padding: 26px; } }
.signup h2 { margin: 0 0 12px; font-size: clamp(23px, 3vw, 30px); letter-spacing: -0.025em; font-weight: 660; }
.signup p { margin: 0 0 14px; color: var(--dim); }
.signup ul { margin: 0; padding-left: 18px; color: var(--dim); font-size: 14.5px; }
.signup li { margin-bottom: 6px; }

form { display: grid; gap: 10px; }
label { font-size: 13px; color: var(--dim); }
input[type=email], input[type=text] {
  width: 100%; padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--line-2); background: var(--void); color: var(--text);
  font-family: var(--mono); font-size: 14px;
}
input::placeholder { color: var(--dimmer); }
form .btn { justify-content: center; }

.result {
  margin: 4px 0 0; padding: 13px 15px; border-radius: 10px; font-size: 14px;
  border: 1px solid var(--line-2); background: var(--panel-2);
}
.result.ok { border-color: color-mix(in srgb, var(--ok) 45%, transparent); color: var(--ok); }
.result.wait { border-color: color-mix(in srgb, var(--sms) 45%, transparent); color: var(--sms); }
.result.bad { border-color: color-mix(in srgb, var(--bad) 45%, transparent); color: var(--bad); }
.result a { color: inherit; }
.result code {
  display: block; margin-top: 8px; font-family: var(--mono); font-size: 12px;
  word-break: break-all; color: var(--text);
}
.hidden { display: none; }

footer {
  border-top: 1px solid var(--line); padding: 30px 0 50px;
  color: var(--dimmer); font-size: 13.5px;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
footer a { color: var(--dim); text-decoration: none; }
footer a:hover { color: var(--text); }
footer .sep { margin-left: auto; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}