:root {
  --bg: var(--color-navy-950);
  --bg2: var(--color-navy-900);
  --panel: #101b2e;
  --panel2: #142238;
  --line: #263754;
  --text: var(--color-paper);
  --muted: var(--color-muted);
  --cyan: var(--color-signal-blue-soft);
  --blue: var(--color-signal-blue);
  --green: var(--color-verified);
  --amber: #ffd16f;
  --shadow-sm: 0 10px 30px rgba(0,0,0,.18);
  --shadow-lg: 0 28px 80px rgba(0,0,0,.26);
  --header: 68px;
  color-scheme: dark;
}

html[data-theme="light"] {
  --bg: #f6f8fb;
  --bg2: #edf2f8;
  --panel: #ffffff;
  --panel2: #f4f7fb;
  --line: #d8e0eb;
  --text: #142033;
  --muted: #5f6f86;
  --cyan: #176d85;
  --blue: #245dcc;
  --green: #148d55;
  --amber: #8f6100;
  --shadow-sm: 0 10px 30px rgba(24,45,76,.08);
  --shadow-lg: 0 24px 70px rgba(24,45,76,.12);
  color-scheme: light;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--font-sans);
}
button, input, select, textarea { font: inherit; }
button, input, select, textarea { color: inherit; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.hidden { display: none !important; }
.shell { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  min-height: var(--header);
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px max(20px, calc((100vw - 1120px) / 2));
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand img { width: 34px; height: 34px; flex: 0 0 auto; }
.brand span { min-width: 0; }
.brand b {
  display: block;
  font-size: 15px;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -.015em;
}
.brand small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.3;
}
.nav { display: flex; align-items: center; gap: 10px; }
.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}
.nav a:hover { color: var(--text); }

.theme-toggle {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
  text-align: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 10px 16px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  line-height: 1.35;
  transition: background-color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}
.btn:hover {
  border-color: color-mix(in srgb, var(--blue) 45%, var(--line));
  background: color-mix(in srgb, var(--panel) 86%, var(--blue));
}
.btn:active { transform: translateY(1px); }
.btn.primary {
  border-color: #3689e0;
  background: linear-gradient(115deg, #1675cf, #1b57c8);
  box-shadow: inset 0 1px 1px #ffffff5c, 0 8px 24px #197af040;
  color: #fff;
}
.btn.primary:hover { background: linear-gradient(115deg, #126bbc, #174db4); border-color: #529bed; transform: translateY(-2px); }
.btn.secondary { background: var(--panel2); }
.btn.ghost { background: transparent; }
.btn.large { min-height: 48px; padding: 12px 18px; font-size: 15px; }
.btn.wide { width: 100%; }

.eyebrow {
  display: inline-block;
  color: var(--cyan);
  font-size: 12px;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
}

/* Public product page */
.public-page {
  --public-action: #3978f6;
  --public-action-fill: linear-gradient(115deg, #1675cf, #1b57c8);
  background: var(--bg);
}
.public-page :is(section, [id]) { scroll-margin-top: 84px; }
.public-page :is(h1,h2,h3,p,dt,dd,a,button) { overflow-wrap: anywhere; }
.public-page .site-header:has(.public-nav:not([data-nav-ready])) { position: static; }

.header-actions {
  order: 3;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mobile-nav-button {
  display: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}
.public-nav,
.public-nav[hidden] {
  order: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.public-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}
.public-nav a:hover,
.text-link:hover { color: var(--cyan); }
.public-page .btn.primary { background: var(--public-action-fill); border-color: #3689e0; }
.public-page .btn.primary:hover { background: linear-gradient(115deg, #126bbc, #174db4); }
.quick-start h2 { margin:0 0 20px; font-size:25px; }
.quick-start-steps { margin:0 0 22px; padding-left:24px; display:grid; gap:18px; }
.quick-start-steps li { padding-left:5px; }
.quick-start-steps li::marker { color:var(--cyan); font-weight:700; }
.quick-start-steps b,.quick-start-steps span { display:block; }
.quick-start-steps b { font-size:16px; margin-bottom:4px; }
.quick-start-steps span { color:var(--muted); font-size:15px; line-height:1.55; }
.quick-start .text-link { display:inline-flex; min-height:44px; align-items:center; margin-top:8px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, .8fr);
  gap: clamp(36px, 6vw, 72px);
  align-items: center;
  padding: clamp(58px, 8vw, 96px) 0 clamp(54px, 8vw, 88px);
}
.hero-copy { min-width: 0; max-width: 720px; }
.hero h1 {
  margin: 16px 0 20px;
  max-width: 760px;
  font-size: clamp(40px, 5vw, 66px);
  line-height: 1.04;
  letter-spacing: -.045em;
  font-weight: 700;
}
.hero h1 span {
  display: block;
  margin-top: .12em;
  color: var(--cyan);
}
.hero-copy > p {
  max-width: 690px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.trust-line {
  margin-top: 22px !important;
  font-size: 14px !important;
  line-height: 1.7 !important;
}

.hero-visual {
  min-width: 0;
  margin: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.hero-visual figcaption {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
}
.hero-visual figcaption span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
}
.sample-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 0 14px;
}
.sample-device-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel2);
  color: var(--cyan);
}
.sample-heading b,
.sample-heading small { display: block; }
.sample-heading b { font-size: 15px; }
.sample-heading small { margin-top: 2px; color: var(--muted); font-size: 13px; }
.sample-permissions { margin: 0; }
.sample-permissions > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}
.sample-permissions dt { color: var(--muted); font-size: 13px; }
.sample-permissions dd { margin: 0; font-size: 14px; text-align: right; }
.sample-note { margin: 16px 0 0; color: var(--muted); font-size: 13px; }

.public-page :is(.how,.security,.platforms,.demo-section) {
  padding: clamp(52px, 7vw, 76px) 0;
  border-top: 1px solid var(--line);
}
.section-copy,
.security-copy { max-width: 760px; }
.section-copy h2,
.security-copy h2,
.final-cta h2 {
  margin: 9px 0 14px;
  font-size: clamp(30px, 3.5vw, 44px);
  line-height: 1.16;
  letter-spacing: -.035em;
  font-weight: 700;
}
.section-copy p,
.security-copy p,
.final-cta p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

.trust-route {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  margin: 34px 0 0;
  padding: 0;
}
.trust-route li {
  min-width: 0;
  padding-top: 15px;
  border-top: 2px solid var(--blue);
}
.trust-route li > span {
  color: var(--cyan);
  font: 600 12px/1.4 var(--font-mono);
}
.trust-route h3 {
  margin: 12px 0 7px;
  font-size: 18px;
  line-height: 1.35;
}
.trust-route p,
.capability-note p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}
.capability-note {
  max-width: 760px;
  margin-top: 32px;
  padding: 3px 0 3px 18px;
  border-left: 2px solid var(--blue);
}
.capability-note h3 { margin: 0 0 6px; font-size: 17px; }

.security {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: clamp(36px, 6vw, 72px);
  align-items: start;
}
.security-details { margin: 0; }
.security-details > div {
  padding: 0 0 20px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.security-details > div:last-child { margin-bottom: 0; }
.security-details dt { font-size: 17px; font-weight: 600; }
.security-details dd {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}
.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 14px;
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.platform-list { margin: 30px 0 0; }
.platform-list > div {
  display: grid;
  grid-template-columns: minmax(160px, .65fr) minmax(0, 2fr);
  gap: 28px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.platform-list dt { font-size: 18px; font-weight: 600; }
.platform-list dd { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
.beta-label {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
}
.availability-note {
  max-width: 880px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.demo-card {
  margin-top: 28px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}
.demo-chat {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}
.avatar {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel2);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
}
.demo-prompt {
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel2);
  font-size: 14px;
}
.flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px minmax(0, 1fr) 24px minmax(0, 1fr) 24px minmax(0, 1fr);
  align-items: center;
  margin: 24px 0 15px;
}
.flow-node {
  min-width: 0;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg2);
  text-align: center;
  font-size: 12px;
  font-weight: 600;
}
.flow-node small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
}
.flow-node.active { border-color: var(--blue); }
.flow-line { height: 1px; background: var(--line); }
.demo-caption { margin: 0 0 6px; color: var(--muted); font-size: 12px; }
.demo-result {
  padding: 11px 12px;
  border-radius: 8px;
  background: var(--panel2);
  color: var(--muted);
  font: 400 14px/1.6 var(--font-mono);
}

.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  margin-top: 36px;
  margin-bottom: 64px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}
.final-cta > .start-copy { max-width: 760px; }
.final-cta > .btn { flex: 0 0 250px; }
.plan-summary {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.plan-summary p { margin: 6px 0; font-size: 14px; }

.footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 24px;
  align-items: center;
  padding: 24px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.footer > div:nth-child(2) { display: flex; flex-wrap: wrap; gap: 12px; }
.footer a { display: inline-flex; align-items: center; min-height: 44px; font-size: 13px; }
.footer > small { font-size: 12px; }

.signup-modal {
  width: min(460px, calc(100% - 24px));
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-lg);
}
.signup-modal::backdrop { background: rgba(2,8,18,.72); backdrop-filter: blur(8px); }
.signup-modal > .close {
  position: absolute;
  right: 14px;
  top: 14px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel2);
  color: var(--text);
  cursor: pointer;
}
.signup-modal > img { width: 42px; height: 42px; margin-bottom: 16px; }
.signup-modal h2 { margin: 7px 0 8px; font-size: 27px; line-height: 1.2; }
.signup-modal > p { margin: 0; color: var(--muted); font-size: 14px; }
.social-buttons { display: grid; gap: 8px; margin-top: 18px; }
.social-buttons button {
  min-height: 48px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel2);
  color: var(--text);
  text-align: left;
}
.social-buttons small { float: right; color: var(--muted); }
.form-status { min-height: 22px; margin-top: 10px; color: var(--muted); font-size: 13px; }
.privacy { display: block; margin-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.auth-dialog { width:min(440px,calc(100% - 24px)); padding:30px; border-radius:22px; box-shadow:0 24px 80px #0006; }
.auth-dialog-brand { display:flex; align-items:center; gap:12px; padding-right:48px; margin-bottom:24px; }
.auth-dialog-brand img { width:42px; height:42px; flex:0 0 auto; }
.auth-dialog-brand b,.auth-dialog-brand small { display:block; }
.auth-dialog-brand b { font-size:15px; }
.auth-dialog-brand small { margin-top:2px; color:var(--muted); font-size:12px; }
.auth-dialog h2 { margin:0 0 8px; font-size:28px; letter-spacing:-.025em; }
.auth-dialog > p { font-size:15px; line-height:1.65; }
.auth-provider-list { margin-top:22px; }
.google-auth-button { display:grid; grid-template-columns:20px minmax(0,1fr) auto; align-items:center; gap:10px; width:100%; min-height:54px !important; padding:10px 12px !important; border:1px solid #747775 !important; border-radius:15px !important; background:#fff !important; color:#1f1f1f; text-align:left; transition:box-shadow .18s ease,transform .18s ease; }
.google-auth-button:not(:disabled) { cursor:pointer; }
.google-auth-button:not(:disabled):hover { box-shadow:0 4px 18px #0003; transform:translateY(-1px); }
.google-mark { width:20px; height:20px; object-fit:contain; flex:0 0 20px; }
.google-label { color:#1f1f1f; font:500 14px/20px "Onest",Arial,sans-serif; }
.google-auth-button small { float:none; color:#555; font-size:11px; white-space:nowrap; }
.google-auth-button[data-busy="true"] { cursor:progress; opacity:.92; }
.google-auth-button[data-busy="true"] .google-auth-status { display:inline-flex; align-items:center; gap:6px; }
.google-auth-button[data-busy="true"] .google-auth-status::before { content:""; width:11px; height:11px; border:2px solid color-mix(in srgb,var(--muted) 45%,transparent); border-top-color:var(--cyan); border-radius:50%; animation:google-auth-spin .75s linear infinite; }
@keyframes google-auth-spin { to { transform:rotate(360deg); } }
.auth-dialog-note { display:grid; gap:3px; margin-top:14px; padding:13px 14px; border:1px solid var(--line); border-radius:10px; background:color-mix(in srgb,var(--panel2) 74%,var(--panel)); }
.auth-dialog-note b { font-size:13px; }
.auth-dialog-note span { color:var(--muted); font-size:12px; line-height:1.55; }
.divider { display: none; }

@media (max-width: 959px) {
  .public-page .site-header { flex-wrap: wrap; }
  .header-actions { margin-left: auto; order: 2; }
  .mobile-nav-button { display: inline-grid; }
  .public-nav[hidden] { display: none; }
  .public-nav:not([hidden]) {
    order: 3;
    width: 100%;
    margin: 8px 0 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--panel);
    flex-direction: column;
    align-items: stretch;
  }
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 48px 0 60px;
  }
  .hero-copy { order: 1; }
  .hero-visual { order: 2; max-width: 620px; }
  .trust-route { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .security { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .final-cta { flex-direction: column; align-items: flex-start; }
  .final-cta > .btn { flex: none; }
  .footer { grid-template-columns: minmax(0, 1fr); gap: 8px; }
}

@media (max-width: 639px) {
  .shell { width: min(100% - 28px, 1120px); }
  .public-page :is(.how,.security,.platforms,.demo-section) { padding: 46px 0; }
  .hero h1 { font-size: clamp(31px, 9vw, 39px); line-height: 1.08; letter-spacing: -.038em; }
  .hero-copy > p { font-size: 16px; }
  .hero-actions .btn { width: 100%; }
  .trust-route { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .platform-list > div { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .demo-chat { grid-template-columns: 34px minmax(0, 1fr); }
  .demo-chat .btn { grid-column: 1 / -1; }
  .flow { grid-template-columns: minmax(0, 1fr); }
  .flow-line { width: 1px; height: 18px; margin-inline: auto; }
  .final-cta { padding: 20px; }
  .final-cta > .btn { width: 100%; }
}

@media (max-width: 479px) {
  .site-header { padding-inline: 12px; }
  .brand img { width: 30px; height: 30px; }
  .brand b { font-size: 14px; }
  .brand small { max-width: 132px; font-size: 11px; }
  .header-actions { gap: 4px; }
  .public-nav[data-nav-ready="true"]:not([hidden]) {
    position: fixed;
    inset: 64px 12px auto;
    width: auto;
    max-height: calc(100dvh - 80px);
    overflow-y: auto;
  }
  .hero { padding-top: 40px; }
  .hero-visual { padding: 16px; }
  .sample-permissions > div { grid-template-columns: minmax(0, 1fr); gap: 3px; }
  .sample-permissions dd { text-align: left; }
}