:root {
  --night: #071412;
  --night-2: #0b201c;
  --panel: rgba(16, 43, 37, .66);
  --line: rgba(193, 255, 223, .15);
  --mint: #75f0bd;
  --mint-bright: #b8ffdc;
  --aqua: #64ddeb;
  --cream: #f3f8f4;
  --muted: #a8bbb4;
  --shadow: 0 28px 90px rgba(0, 0, 0, .45);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--night); }
body {
  margin: 0;
  min-width: 320px;
  color: var(--cream);
  background:
    radial-gradient(circle at 50% 18%, rgba(83, 221, 170, .12), transparent 30rem),
    linear-gradient(155deg, #06110f 0%, #091a17 48%, #061210 100%);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button, a { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 20; padding: 10px 14px; color: #04100d; background: var(--mint-bright); border-radius: 10px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 19px 0;
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--cream); text-decoration: none; font-weight: 760; letter-spacing: -.03em; }
.brand-ai { color: var(--mint); }
.brand-mark { width: 33px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.build-state { color: #87a49a; font-size: 10px; letter-spacing: .13em; }

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  align-content: center;
  min-height: 100svh;
  overflow: hidden;
  padding: 104px 20px 46px;
  text-align: center;
}

.signal { position: absolute; z-index: -2; border: 1px solid rgba(112, 240, 187, .08); border-radius: 50%; pointer-events: none; }
.signal-one { width: 760px; aspect-ratio: 1; left: 50%; top: 56%; transform: translate(-50%, -50%); box-shadow: inset 0 0 120px rgba(77, 221, 162, .025); }
.signal-two { width: 1100px; aspect-ratio: 1; left: 50%; top: 56%; transform: translate(-50%, -50%); }

.hero-copy { width: min(820px, 100%); margin: 0 auto; }
.eyebrow { display: flex; align-items: center; justify-content: center; gap: 9px; margin: 0 0 18px; color: var(--mint); font-size: 11px; font-weight: 750; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow span { width: 22px; height: 1px; background: currentColor; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 20px; font-size: clamp(2.45rem, 7vw, 5.6rem); line-height: .98; letter-spacing: -.062em; font-weight: 620; text-wrap: balance; }
h1 em { display: block; color: var(--mint-bright); font-family: Georgia, "Times New Roman", serif; font-weight: 400; }
.lede { max-width: 690px; margin: 0 auto; color: var(--muted); font-size: clamp(1rem, 2vw, 1.2rem); text-wrap: balance; }

.voice-stage { position: relative; display: grid; justify-items: center; width: min(610px, 100%); margin: clamp(34px, 6vh, 58px) auto 0; }
.orb-rings { position: absolute; left: 50%; top: 46%; width: 260px; aspect-ratio: 1; transform: translate(-50%, -50%); pointer-events: none; }
.orb-rings i { position: absolute; inset: 0; border: 1px solid rgba(117, 240, 189, .12); border-radius: 50%; animation: breathe 3.8s ease-in-out infinite; }
.orb-rings i:nth-child(2) { inset: 22px; animation-delay: -.9s; }
.orb-rings i:nth-child(3) { inset: 44px; animation-delay: -1.8s; }

.sofia-button {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 58px 1fr 32px;
  align-items: center;
  gap: 14px;
  width: min(410px, 100%);
  min-height: 88px;
  padding: 14px 18px;
  color: #06130f;
  text-align: left;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, .78);
  border-radius: 999px;
  background: linear-gradient(125deg, #d0ffe7, #7ef2bd 58%, #63dbe7);
  box-shadow: 0 0 0 8px rgba(117, 240, 189, .06), 0 20px 70px rgba(79, 238, 176, .25), inset 0 1px rgba(255, 255, 255, .65);
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease;
}
.sofia-button:hover { transform: translateY(-2px); box-shadow: 0 0 0 10px rgba(117, 240, 189, .08), 0 26px 84px rgba(79, 238, 176, .32); }
.sofia-button:focus-visible { outline: 3px solid white; outline-offset: 5px; }
.mic-icon { display: grid; place-items: center; width: 58px; aspect-ratio: 1; color: white; border-radius: 50%; background: rgba(5, 30, 23, .92); box-shadow: inset 0 0 22px rgba(117, 240, 189, .18); }
.mic-icon svg { width: 26px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; }
.button-copy { display: grid; gap: 2px; }
.button-copy strong { font-size: 1.08rem; letter-spacing: -.02em; }
.button-copy small { color: rgba(5, 25, 19, .66); font-size: .77rem; }
.voice-bars { display: flex; align-items: center; justify-content: center; gap: 3px; height: 28px; }
.voice-bars i { width: 3px; height: 8px; border-radius: 3px; background: #0b3c2e; }
.sofia-button .voice-bars i { animation: bars 1.1s ease-in-out infinite alternate; }
.voice-bars i:nth-child(2) { animation-delay: -.25s !important; }
.voice-bars i:nth-child(3) { animation-delay: -.45s !important; }
.voice-bars i:nth-child(4) { animation-delay: -.12s !important; }
.call-status { z-index: 2; min-height: 24px; margin: 20px 0 2px; color: var(--mint-bright); font-size: .92rem; }
.mic-note { z-index: 2; margin: 0; color: #849b92; font-size: .77rem; }

.reassurance { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px; max-width: 680px; margin: 34px auto 0; color: #91aaa1; font-size: .75rem; }
.reassurance span::before { content: "✓"; margin-right: 7px; color: var(--mint); }

.steps, .trust, footer { width: min(1080px, calc(100% - 40px)); margin-inline: auto; }
.steps { padding: 100px 0; }
.section-heading { max-width: 650px; margin: 0 auto 50px; text-align: center; }
h2 { margin-bottom: 18px; font-size: clamp(2rem, 4.5vw, 3.65rem); line-height: 1.04; letter-spacing: -.045em; text-wrap: balance; }
.steps ol { display: grid; gap: 14px; padding: 0; margin: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 48px 1fr; gap: 15px; padding: 22px; border: 1px solid var(--line); border-radius: 22px; background: var(--panel); backdrop-filter: blur(12px); }
.steps li b { color: var(--mint); font-size: .74rem; letter-spacing: .12em; }
.steps h3 { margin-bottom: 6px; font-size: 1rem; }
.steps li p { margin-bottom: 0; color: var(--muted); font-size: .9rem; }

.trust { padding: 56px 24px; text-align: center; border: 1px solid var(--line); border-radius: 28px; background: linear-gradient(145deg, rgba(21, 55, 47, .72), rgba(9, 27, 23, .82)); box-shadow: var(--shadow); }
.trust p:last-child { max-width: 690px; margin: 0 auto; color: var(--muted); }
footer { padding: 72px 0 38px; color: #71877f; font-size: .72rem; text-align: center; }
footer p { max-width: 840px; margin: 0 auto 13px; }

@keyframes breathe { 50% { transform: scale(1.06); opacity: .45; } }
@keyframes bars { from { height: 7px; } to { height: 25px; } }
@media (min-width: 780px) {
  .steps ol { grid-template-columns: repeat(3, 1fr); }
  .steps li { grid-template-columns: 1fr; min-height: 190px; padding: 28px; }
  .steps h3 { font-size: 1.1rem; }
}
@media (max-width: 520px) {
  .build-state { display: none; }
  .hero { padding-inline: 16px; }
  h1 { font-size: clamp(2.42rem, 12vw, 3.65rem); }
  .sofia-button { grid-template-columns: 50px 1fr 24px; min-height: 80px; padding: 12px 15px; }
  .mic-icon { width: 50px; }
  .button-copy small { font-size: .68rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}