@font-face { font-family: InterFallback; src: local("Helvetica Neue"); font-display: swap; }

:root {
  color-scheme: dark;
  --bg: #0B0D12;
  --surface: #141821;
  --surface-raised: #1B202B;
  --surface-soft: #11151D;
  --line: #2A3140;
  --text: #F7F8FC;
  --muted: #AAB1C0;
  --accent: #9AA5FF;
  --accent-strong: #6D72F6;
  --accent-soft: #222747;
  --success: #64D59A;
  --success-soft: #142D25;
  --warning: #F3C969;
  --danger: #FF7A83;
  --danger-soft: #351A21;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 79% 7%, rgba(109, 114, 246, 0.17) 0, rgba(109, 114, 246, 0.05) 21rem, transparent 39rem),
    radial-gradient(circle at 8% 33%, rgba(76, 84, 180, 0.08) 0, transparent 28rem),
    var(--bg);
  color: var(--text);
  font: 16px/1.65 InterFallback, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 0.2em; }
a:hover { color: #C5CBFF; }
img { display: block; max-width: 100%; }

.shell { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.site-header {
  position: relative;
  z-index: 10;
  width: min(1240px, calc(100% - 48px));
  min-height: 82px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid rgba(42, 49, 64, 0.85);
}
.brand { display: inline-flex; align-items: center; color: var(--text); text-decoration: none; }
.brand-wordmark { width: min(228px, 58vw); height: auto; }
nav { display: flex; flex-wrap: wrap; gap: 6px; }
nav a { padding: 8px 11px; border-radius: 10px; color: var(--muted); text-decoration: none; font-size: 0.9rem; }
nav a:hover, nav a[aria-current="page"] { color: var(--text); background: var(--surface-raised); }

.hero {
  min-height: 740px;
  padding-block: 80px 76px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, 0.92fr);
  align-items: center;
  gap: 72px;
}
.hero-copy { position: relative; z-index: 2; }
.eyebrow { margin: 0 0 18px; color: var(--accent); font-size: 0.74rem; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; }
.eyebrow > span { display: inline-block; width: 7px; height: 7px; margin: 0 9px 1px 0; background: var(--accent); border-radius: 999px; box-shadow: 0 0 0 5px rgba(154, 165, 255, 0.09); }
h1, h2, h3 { margin-top: 0; color: var(--text); line-height: 1.08; letter-spacing: -0.038em; }
h1 { max-width: 790px; margin-bottom: 16px; font-size: clamp(3rem, 5.2vw, 4.65rem); }
.hero-promise { max-width: 700px; margin: 0 0 24px; background: linear-gradient(105deg, #F7F8FC 5%, var(--accent) 47%, #C3C8FF 100%); background-clip: text; -webkit-background-clip: text; color: transparent; font-size: clamp(2rem, 3.6vw, 3.2rem); font-weight: 780; line-height: 1.08; letter-spacing: -0.038em; }
h2 { margin-bottom: 20px; font-size: clamp(2.25rem, 4.7vw, 4.15rem); }
h3 { margin-bottom: 12px; font-size: 1.35rem; }
.lede { max-width: 730px; margin: 0; color: #C8CDDA; font-size: clamp(1.08rem, 1.8vw, 1.32rem); line-height: 1.6; }
.capability-boundary { max-width: 730px; margin: 18px 0 0; color: var(--muted); font-size: 0.94rem; line-height: 1.58; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 12px 20px; border: 1px solid var(--line); border-radius: 14px; font-weight: 750; text-decoration: none; transition: transform 150ms ease, background-color 150ms ease, border-color 150ms ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--accent-strong); color: #FFFFFF; border-color: var(--accent-strong); box-shadow: 0 12px 32px rgba(62, 64, 192, 0.26); }
.button.primary:hover { background: #7A7FF8; color: #FFFFFF; }
.button.secondary { background: var(--accent-soft); color: #E2E5FF; border-color: #4D568D; }
.button.secondary:hover { background: #2B3158; color: #FFFFFF; }
.privacy-chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 30px; }
.privacy-chips span { padding: 7px 11px; color: var(--muted); background: rgba(20, 24, 33, 0.72); border: 1px solid var(--line); border-radius: 999px; font-size: 0.79rem; font-weight: 650; }

.signal-demo { position: relative; min-height: 580px; display: flex; flex-direction: column; justify-content: center; gap: 18px; }
.demo-disclaimer { position: relative; z-index: 3; align-self: center; margin: 0 0 2px; padding: 7px 11px; color: #D7DBE6; background: rgba(11, 13, 18, 0.9); border: 1px solid var(--line); border-radius: 999px; font-size: 0.7rem; font-weight: 750; letter-spacing: 0.025em; text-align: center; }
.demo-glow { position: absolute; inset: 6% 0 0; background: radial-gradient(circle, rgba(109, 114, 246, 0.22) 0, rgba(47, 48, 122, 0.08) 36%, transparent 68%); filter: blur(4px); }
.demo-card { position: relative; z-index: 2; width: min(100%, 410px); padding: 22px; background: rgba(20, 24, 33, 0.95); border: 1px solid var(--line); border-radius: 22px; box-shadow: 0 28px 70px rgba(0, 0, 0, 0.34); }
.incoming-card { align-self: flex-start; transform: rotate(-1.2deg); }
.phrase-card { align-self: flex-end; transform: rotate(1deg); background: linear-gradient(155deg, rgba(27, 32, 43, 0.99), rgba(18, 22, 31, 0.99)); border-color: #414A78; }
.demo-card-topline { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 8px; color: var(--muted); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; }
.danger-dot { background: var(--danger); box-shadow: 0 0 0 5px rgba(255, 122, 131, 0.09); }
.demo-time { color: #747D91; font-weight: 600; text-transform: none; letter-spacing: 0; }
.caller-avatar { width: 68px; height: 68px; margin: 25px auto 13px; display: grid; place-items: center; background: var(--accent-soft); border: 1px solid #50598F; border-radius: 50%; color: #E2E5FF; font-size: 1.55rem; font-weight: 750; }
.caller-name, .caller-number { margin: 0; text-align: center; }
.caller-name { color: var(--text); font-size: 1.32rem; font-weight: 760; }
.caller-number { margin-top: 2px; color: var(--muted); font-size: 0.88rem; }
.risk-label, .signal-label { margin-top: 22px; padding: 10px 12px; display: flex; align-items: center; gap: 9px; border-radius: 11px; font-size: 0.78rem; font-weight: 700; }
.risk-label { color: #FFD4D8; background: var(--danger-soft); border: 1px solid rgba(255, 122, 131, 0.25); }
.risk-label span { width: 20px; height: 20px; display: grid; place-items: center; color: #1A0B0D; background: var(--danger); border-radius: 50%; font-weight: 900; }
.demo-connector { position: absolute; z-index: 1; inset: 0; display: grid; place-items: center; pointer-events: none; }
.demo-connector::before, .demo-connector::after { content: ""; position: absolute; width: 132px; height: 132px; border: 1px solid rgba(109, 114, 246, 0.24); border-radius: 50%; }
.demo-connector::after { width: 214px; height: 214px; border-color: rgba(109, 114, 246, 0.1); }
.demo-connector span { width: 12px; height: 12px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 0 10px rgba(109, 114, 246, 0.12), 0 0 42px 16px rgba(109, 114, 246, 0.38); }
.app-label { display: flex; align-items: center; gap: 10px; }
.app-label img { border-radius: 8px; }
.app-label div { display: flex; flex-direction: column; }
.app-label strong { color: var(--text); font-size: 0.84rem; }
.app-label span { color: var(--muted); font-size: 0.72rem; }
.phrase-panel { margin-top: 20px; padding: 20px; background: var(--surface-soft); border: 1px solid #30384A; border-radius: 15px; }
.phrase-panel span { display: block; margin-bottom: 10px; color: var(--accent); font-size: 0.69rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }
.phrase-panel strong { color: var(--text); font-size: clamp(1.35rem, 3vw, 1.75rem); line-height: 1.25; letter-spacing: -0.02em; }
.signal-label { color: #C9F5DD; background: var(--success-soft); border: 1px solid rgba(100, 213, 154, 0.22); }
.signal-label span { width: 20px; height: 20px; display: grid; place-items: center; color: #07130D; background: var(--success); border-radius: 50%; font-weight: 900; }

.notice, .warning, .legal-summary { padding: 19px 22px; background: rgba(243, 201, 105, 0.07); border: 1px solid rgba(243, 201, 105, 0.26); border-radius: 16px; color: #F6E6C1; }
.hero > .notice { grid-column: 1 / -1; max-width: 100%; margin-top: -26px; }

.section { padding-block: 104px; border-top: 1px solid rgba(42, 49, 64, 0.8); }
.section-heading { max-width: 900px; margin-bottom: 48px; }
.narrow-heading { max-width: 760px; }
.section-lede { max-width: 830px; margin: 0; color: var(--muted); font-size: 1.1rem; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.scenario-card { min-height: 315px; padding: 26px; background: linear-gradient(155deg, var(--surface), #10131A); border: 1px solid var(--line); border-radius: 20px; }
.scenario-card p:last-child { color: var(--muted); }
.scenario-icon { width: 42px; height: 42px; margin-bottom: 40px; display: grid; place-items: center; color: var(--accent); background: var(--accent-soft); border: 1px solid #414A78; border-radius: 13px; font: 750 0.73rem/1 monospace; }
.scenario-kicker { margin: 0 0 9px; color: var(--danger) !important; font-size: 0.75rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; }

.steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.card { min-height: 235px; padding: 28px; display: grid; grid-template-columns: 54px 1fr; gap: 16px; background: linear-gradient(145deg, var(--surface), #10131A); border: 1px solid var(--line); border-radius: 20px; }
.card p, .feature-list p, .callout p { color: var(--muted); }
.card p { margin-bottom: 0; }
.step-number { width: 40px; height: 40px; display: grid; place-items: center; color: var(--accent); background: var(--accent-soft); border: 1px solid #414A78; border-radius: 12px; font: 750 0.75rem/1 monospace; }
.split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 90px; }
.feature-list p { margin: 0; padding: 22px 0; border-bottom: 1px solid var(--line); }
.feature-list p:first-child { padding-top: 0; }
.feature-list strong { color: var(--text); }
.callout { display: flex; align-items: end; justify-content: space-between; gap: 50px; }
.callout > div { max-width: 760px; }

.legal { max-width: 850px; padding-block: 100px 130px; }
.legal h1 { max-width: 820px; font-size: clamp(3.2rem, 8vw, 6.4rem); }
.legal h2 { margin: 68px 0 16px; font-size: clamp(1.65rem, 4vw, 2.45rem); }
.legal p, .legal li { color: #BCC2CF; }
.legal strong { color: var(--text); }
.legal ol { padding-left: 1.4rem; }
.legal li { margin-bottom: 12px; padding-left: 8px; }
.legal-summary { margin: 44px 0 10px; background: rgba(109, 114, 246, 0.08); border-color: rgba(154, 165, 255, 0.28); color: #E1E4FF; }
.warning { margin: 44px 0 10px; }

.site-footer { min-height: 110px; padding-block: 28px; display: flex; justify-content: space-between; align-items: center; gap: 24px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.88rem; }
.site-footer div { display: flex; gap: 18px; }
.site-footer a { color: var(--muted); }

:focus-visible { outline: 3px solid var(--warning); outline-offset: 3px; }
@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; gap: 54px; }
  .signal-demo { width: min(100%, 620px); margin-inline: auto; }
  .hero > .notice { margin-top: 0; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-card { min-height: 0; }
  .scenario-icon { margin-bottom: 28px; }
}
@media (max-width: 760px) {
  .shell, .site-header { width: min(100% - 32px, var(--max)); }
  .site-header { padding-block: 16px; align-items: flex-start; flex-direction: column; }
  nav { width: 100%; gap: 2px; }
  nav a { padding-inline: 8px; }
  .hero { min-height: auto; padding-block: 68px 64px; }
  h1 { font-size: clamp(2.8rem, 13vw, 4.5rem); }
  .signal-demo { min-height: 540px; }
  .demo-card { width: min(94%, 410px); }
  .steps, .split { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  .split { gap: 34px; }
  .section { padding-block: 76px; }
  .callout, .site-footer { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 460px) {
  .hero-actions, .button { width: 100%; }
  .signal-demo { min-height: 500px; }
  .demo-card { padding: 18px; }
  .incoming-card, .phrase-card { transform: none; }
  .card { grid-template-columns: 1fr; }
  .privacy-chips { gap: 7px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}