/* CryptoExtend teaser — dark, premium crypto aesthetic.
   One accent gradient: electric green -> cyan. No external fonts. */

:root {
  --bg: #060a0f;
  --bg-soft: rgba(10, 18, 26, 0.72);
  --ink: #e8f1f5;
  --ink-dim: #9fb4bf;
  --line: rgba(122, 212, 208, 0.16);
  --accent-a: #29ffa8;
  --accent-b: #22d3ee;
  --grad: linear-gradient(92deg, var(--accent-a), var(--accent-b));
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---- background canvas + readability scrim ---- */

#hero-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}

.scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 12%, rgba(6, 10, 15, 0.10), rgba(6, 10, 15, 0.66) 62%, rgba(6, 10, 15, 0.88) 100%),
    linear-gradient(180deg, rgba(6, 10, 15, 0.55), rgba(6, 10, 15, 0.25) 30%, rgba(6, 10, 15, 0.72));
}

/* ---- skip link + focus ---- */

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  z-index: 20;
  padding: 0.65rem 1.1rem;
  border-radius: 0 0 10px 10px;
  background: #0b1620;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--mono);
  transition: top 0.15s ease;
}

.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--accent-b);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---- header: wordmark + motion toggle ---- */

.site-header {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem clamp(1.1rem, 4vw, 3rem);
}

.wordmark {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
}

.wordmark span {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.motion-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 1rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.motion-toggle:hover { border-color: rgba(122, 212, 208, 0.5); }

.motion-toggle:active { transform: translateY(1px); }

.motion-toggle-icon {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 2px;
  background: var(--grad);
  box-shadow: 0 0 10px rgba(41, 255, 168, 0.55);
}

.motion-toggle[aria-pressed="true"] .motion-toggle-icon {
  clip-path: polygon(0 0, 100% 50%, 0 100%);
  border-radius: 1px;
}

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

.site-header, main, .site-footer {
  position: relative;
  z-index: 2;
}

main {
  padding: clamp(2.2rem, 8vh, 5.5rem) clamp(1.1rem, 4vw, 3rem) 3rem;
}

.hero {
  max-width: 56rem;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  margin: 0 auto;
  max-width: 18ch;
  font-size: clamp(2.35rem, 8.2vw, 5.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  text-wrap: balance;
  background: linear-gradient(100deg, var(--ink) 0%, var(--ink) 38%, var(--accent-a) 52%, var(--accent-b) 66%, var(--ink) 82%, var(--ink) 100%);
  background-size: 220% 100%;
  background-position: 100% 0;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sweep 7s linear infinite;
  text-shadow: 0 0 60px rgba(6, 10, 15, 0.9);
}

@keyframes sweep {
  0% { background-position: 120% 0; }
  100% { background-position: -60% 0; }
}

.hero-sub {
  margin: 1.35rem auto 0;
  max-width: 42ch;
  font-size: clamp(1.02rem, 2.4vw, 1.3rem);
  color: var(--ink-dim);
  text-shadow: 0 1px 18px rgba(6, 10, 15, 0.9);
}

/* ---- signup form ---- */

.signup {
  margin: 2.6rem auto 0;
  max-width: 27.5rem;
  padding: 1.55rem 1.5rem 1.45rem;
  text-align: left;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.42);
}

.signup-title {
  margin: 0 0 1.1rem;
  font-family: var(--mono);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-a);
}

.field-row { display: flex; flex-direction: column; gap: 0.4rem; }

.field-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

input[type="email"] {
  width: 100%;
  padding: 0.8rem 0.95rem;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--ink);
  background: rgba(6, 12, 18, 0.85);
  border: 1px solid var(--line);
  border-radius: 10px;
}

input[type="email"]::placeholder { color: #627985; }

input[type="email"]:focus-visible { border-color: var(--accent-b); }

.hp-field {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.consent-row {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin: 1.05rem 0 1.25rem;
  font-size: 0.92rem;
  color: var(--ink-dim);
}

.consent-row input {
  flex: none;
  width: 1.1rem;
  height: 1.1rem;
  margin: 0.18rem 0 0;
  accent-color: var(--accent-a);
}

.consent-row label { cursor: pointer; }

.submit-btn {
  width: 100%;
  padding: 0.92rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #04120c;
  background: var(--grad);
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.submit-btn:hover:not(:disabled) { filter: brightness(1.08); transform: translateY(-1px); }
.submit-btn:active:not(:disabled) { transform: translateY(0); }

.submit-btn:disabled {
  cursor: not-allowed;
  filter: grayscale(0.65) brightness(0.7);
  color: #0b1a14;
}

.signup-status {
  min-height: 1.45rem;
  margin: 0.85rem 0 0;
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--ink);
}

.signup-status.is-error { color: #ffb4a2; }
.signup-status.is-ok { color: var(--accent-a); }

/* ---- footer ---- */

.site-footer {
  padding: 2.2rem clamp(1.1rem, 4vw, 3rem) 2.6rem;
  border-top: 1px solid var(--line);
  background: rgba(6, 10, 15, 0.6);
  font-size: 0.85rem;
  color: var(--ink-dim);
}

.site-footer p { margin: 0 auto 0.65rem; max-width: 62rem; }

.site-footer p:last-child { margin-bottom: 0; }

.privacy { max-width: 52rem; }

.disclaimer { color: var(--ink); font-weight: 600; }

/* ---- motion paused: freeze CSS animations ---- */

.motion-paused .hero h1 { animation-play-state: paused; }

/* ---- reduced motion: static frame ---- */

@media (prefers-reduced-motion: reduce) {
  .hero h1 {
    animation: none;
    background-position: 42% 0;
    background-size: 180% 100%;
  }
  * {
    transition-duration: 0.01ms !important;
  }
}

/* ---- small screens ---- */

@media (max-width: 420px) {
  .site-header { padding: 1.1rem 1rem; }
  .wordmark { font-size: 0.95rem; letter-spacing: 0.12em; }
  .motion-toggle { padding: 0.5rem 0.85rem; font-size: 0.76rem; }
  .signup { padding: 1.25rem 1.05rem 1.15rem; }
  .consent-row { font-size: 0.88rem; }
}