@font-face {
  font-family: "GeoGrotesque";
  src: url("../app/assets/fonts/Geogrotesque-Md.ttf") format("truetype");
  font-display: swap;
  font-weight: 500;
}

:root {
  color-scheme: light dark;
  --canvas: #f3f5f8;
  --surface: #eceff4;
  --paper: #ffffff;
  --ink: #172033;
  --muted: #5b677d;
  --line: #dce2ea;
  --accent: #2457c5;
  --accent-deep: #173f98;
  --on-accent: #f7f9ff;
  --soft: #eaf0fc;
  --header: rgb(243 245 248 / 84%);
  --radius-sm: 8px;
  --radius-md: 12px;
  --shadow: 0 24px 64px rgb(23 51 123 / 10%);
  --font-sans: "GeoGrotesque", "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #0a0f18;
    --surface: #0e1520;
    --paper: #131c29;
    --ink: #edf2f9;
    --muted: #a7b2c2;
    --line: #263448;
    --accent: #79a7ff;
    --accent-deep: #5c8ef0;
    --on-accent: #0a1426;
    --soft: rgb(121 167 255 / 12%);
    --header: rgb(10 15 24 / 84%);
    --shadow: 0 24px 64px rgb(0 0 0 / 38%);
  }
}

* {
  box-sizing: border-box;
}

html {
  max-width: 100%;
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  position: relative;
  max-width: 100%;
  margin: 0;
  overflow-x: clip;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0.024;
  background-image: repeating-radial-gradient(circle at 30% 40%, currentColor 0 0.45px, transparent 0.6px 4px);
  background-size: 7px 7px;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
input {
  font: inherit;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

.shell {
  width: min(100% - 48px, 1240px);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -64px;
  z-index: 100;
  padding: 12px 16px;
  background: var(--ink);
  color: var(--canvas);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: 16px;
}

.header-sentinel {
  position: absolute;
  inset: 18px 0 auto;
  height: 1px;
  pointer-events: none;
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  border-bottom: 1px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.site-header.scrolled {
  background: var(--header);
  border-color: var(--line);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.nav {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.brand img {
  border-radius: var(--radius-sm);
}

.brand small {
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  letter-spacing: 0;
  margin-left: 3px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(22px, 3vw, 38px);
  font-size: 14px;
  color: var(--muted);
}

.nav-links a {
  transition: color 0.2s ease;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
}

.nav-cta {
  padding: 10px 16px;
  color: var(--on-accent) !important;
  background: var(--accent);
  border-radius: var(--radius-sm);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  color: var(--on-accent) !important;
  background: var(--accent-deep);
}

.menu-button {
  display: none;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  border: 0;
  background: transparent;
  color: var(--ink);
}

.menu-button span {
  width: 22px;
  height: 1px;
  background: currentColor;
  transition: transform 0.24s ease;
}

/* ---------- Shared elements ---------- */

.eyebrow {
  margin-bottom: 20px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  white-space: nowrap;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.button:active {
  transform: scale(0.98);
}

.button-primary {
  color: var(--on-accent);
  background: var(--accent);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-deep);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink);
}

.text-link .icon {
  color: var(--accent);
  transition: transform 0.2s ease;
}

.text-link:hover .icon,
.text-link:focus-visible .icon {
  transform: translate(2px, -2px);
}

.icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
  flex: none;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100dvh;
  padding-top: 96px;
  padding-bottom: 48px;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: center;
  gap: clamp(40px, 5vw, 88px);
}

.hero::before {
  content: "";
  position: absolute;
  width: 56vw;
  height: 56vw;
  right: -24vw;
  top: -24vw;
  border-radius: 50%;
  background: radial-gradient(circle, var(--soft), transparent 66%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 560px;
}

.hero h1 {
  margin-bottom: 24px;
  font-size: clamp(46px, 5.4vw, 72px);
  line-height: 1.06;
  font-weight: 500;
  letter-spacing: 0;
}

.hero h1 .hl {
  color: var(--accent);
}

.hero-lede {
  max-width: 26em;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 26px;
}

.hero-visual {
  position: relative;
}

.media-stack-panel {
  position: absolute;
  inset: 0;
  transform: translate(18px, 18px);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--soft);
}

.hero-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 14%), inset 0 0 64px rgb(13 31 60 / 10%);
  pointer-events: none;
}

.hero-art {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: 57% center;
  filter: saturate(0.92) contrast(1.04);
}

.hero-caption {
  padding: 14px 20px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* ---------- Principle band ---------- */

.principle-band {
  border-block: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 55%, transparent);
}

.principle-grid {
  min-height: 128px;
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  align-items: center;
  gap: 36px;
}

.principle-grid > p {
  font-size: clamp(19px, 2vw, 26px);
  line-height: 1.45;
}

.principle-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  color: var(--muted);
  font-size: 13px;
}

.principle-points span {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

/* ---------- Sections ---------- */

.section {
  padding-block: clamp(88px, 11vw, 148px);
}

.section-heading {
  max-width: 660px;
  margin-bottom: 56px;
}

.section-heading h2,
.security-intro h2,
.everyday-copy h2,
.download-copy h2,
.faq-title h2 {
  margin-bottom: 20px;
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.1;
  letter-spacing: 0;
  font-weight: 500;
}

.section-heading p,
.security-intro > p,
.everyday-copy > p,
.download-copy p,
.faq-title p {
  max-width: 600px;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- Features (bento) ---------- */

.feature-mosaic {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-rows: auto auto;
  gap: 18px;
}

.feature {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
}

.feature-copy {
  padding: clamp(26px, 3vw, 40px);
}

.feature-index {
  display: block;
  margin-bottom: 16px;
  color: var(--accent);
  font-size: 12px;
}

.feature h3 {
  max-width: 520px;
  margin-bottom: 14px;
  font-size: clamp(24px, 2.6vw, 36px);
  line-height: 1.18;
  letter-spacing: 0;
  font-weight: 500;
}

.feature p {
  max-width: 480px;
  color: var(--muted);
  line-height: 1.7;
}

.feature-msg {
  grid-row: span 2;
  min-height: 620px;
}

.feature-msg .feature-copy {
  flex: none;
}

.feature-image {
  margin-top: auto;
  height: 44%;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 42% 58%;
  filter: saturate(0.9) contrast(1.05);
}

.feature-call {
  min-height: 330px;
  background: linear-gradient(160deg, var(--soft), transparent 58%);
}

.waveform {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 clamp(26px, 3vw, 40px) 34px;
}

.waveform i {
  width: 3px;
  height: var(--wave, 26px);
  border-radius: 2px;
  background: color-mix(in srgb, var(--accent) 62%, transparent);
  animation: wave 1.6s ease-in-out infinite alternate;
}

.waveform i:nth-child(2),
.waveform i:nth-child(10) { --wave: 44px; animation-delay: -0.5s; }
.waveform i:nth-child(3),
.waveform i:nth-child(9) { --wave: 28px; animation-delay: -1.1s; }
.waveform i:nth-child(4),
.waveform i:nth-child(8) { --wave: 56px; animation-delay: -0.3s; }
.waveform i:nth-child(5),
.waveform i:nth-child(7) { --wave: 36px; animation-delay: -0.8s; }
.waveform i:nth-child(6) { --wave: 64px; animation-delay: -1.4s; }

@keyframes wave {
  to {
    transform: scaleY(0.45);
    opacity: 0.5;
  }
}

.feature-platform {
  min-height: 330px;
}

.platform-list {
  margin-top: auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 28px;
  padding: 0 clamp(26px, 3vw, 40px) 34px;
}

.platform-list li {
  padding: 9px 0;
  color: var(--muted);
  font-size: 14px;
}

.feature-local {
  grid-column: 1 / -1;
  min-height: 280px;
  justify-content: flex-end;
  background: linear-gradient(100deg, var(--soft), transparent 62%);
}

.feature-local .feature-copy {
  max-width: 640px;
}

/* ---------- Security ---------- */

.security {
  background: var(--surface);
}

.security-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(56px, 8vw, 120px);
}

.security-intro {
  position: sticky;
  top: 120px;
  align-self: start;
}

.security-intro .text-link {
  margin-top: 20px;
}

.security-flow {
  position: relative;
}

.security-flow::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 26px;
  bottom: 26px;
  width: 1px;
  background: var(--line);
}

.security-flow li {
  position: relative;
  min-height: 210px;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 28px;
  align-items: start;
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.security-flow li:first-child {
  padding-top: 0;
}

.security-flow li:last-child {
  border-bottom: 0;
}

.flow-marker {
  position: relative;
  z-index: 1;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--canvas);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.security-flow h3 {
  margin-bottom: 10px;
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.2;
  letter-spacing: 0;
  font-weight: 500;
}

.security-flow p {
  max-width: 520px;
  color: var(--muted);
  line-height: 1.7;
}

/* ---------- Everyday ---------- */

.everyday {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(48px, 7vw, 96px);
}

.everyday-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.everyday-frame img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: grayscale(0.92) contrast(1.05);
}

.everyday-copy h2 {
  max-width: 520px;
}

.capability-list {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.capability-list li {
  padding: 17px 0;
  color: var(--muted);
  font-size: 15px;
}

.capability-list li:nth-child(n + 3) {
  border-top: 1px solid var(--line);
}

/* ---------- Download ---------- */

.download {
  padding-top: 0;
}

.download-panel {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  align-items: end;
  gap: 56px;
  padding: clamp(36px, 6vw, 76px);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, var(--soft), transparent 55%), var(--paper);
  box-shadow: var(--shadow);
}

.download-copy h2 {
  max-width: 640px;
}

.download-actions {
  padding-bottom: 6px;
}

.download-actions .button {
  margin-bottom: 18px;
}

.download-actions p {
  max-width: 330px;
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- FAQ ---------- */

.faq {
  display: grid;
  grid-template-columns: 0.55fr 1.45fr;
  gap: clamp(56px, 8vw, 120px);
}

.faq-title {
  position: sticky;
  top: 120px;
  align-self: start;
}

.faq-title h2 {
  font-size: clamp(32px, 3.8vw, 50px);
}

.accordion details {
  border-bottom: 1px solid var(--line);
}

.accordion summary {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(16px, 1.6vw, 19px);
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion-icon {
  width: 20px;
  height: 20px;
  flex: none;
  fill: var(--accent);
  transition: transform 0.24s ease;
}

.accordion details[open] .accordion-icon {
  transform: rotate(45deg);
}

.accordion details p {
  max-width: 640px;
  margin: -6px 44px 30px 0;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- Footer ---------- */

.footer {
  padding: 72px 0 28px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  padding-bottom: 56px;
}

.footer-brand p {
  margin-top: 18px;
  color: var(--muted);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.footer-links h3 {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.footer-links a {
  display: block;
  width: fit-content;
  margin-bottom: 13px;
  font-size: 14px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

/* ---------- Reveal ---------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.24s ease, transform 0.24s ease;
}

[data-reveal][data-delay="1"] {
  transition-delay: 0.08s;
}

[data-reveal][data-delay="2"] {
  transition-delay: 0.16s;
}

[data-reveal].visible {
  opacity: 1;
  transform: none;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 3px;
}

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 112px;
    padding-bottom: 64px;
    gap: 40px;
  }

  .hero-copy {
    max-width: 640px;
  }

  .hero-visual {
    max-width: 680px;
  }

  .feature-mosaic {
    grid-template-columns: 1fr 1fr;
  }

  .feature-msg {
    grid-row: span 1;
    min-height: 480px;
  }

  .feature-local {
    grid-column: 1 / -1;
  }

  .everyday {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .everyday-media {
    max-width: 640px;
  }
}

@media (max-width: 900px) {
  .shell {
    width: min(100% - 32px, 720px);
  }

  .menu-button {
    display: flex;
    position: relative;
    z-index: 3;
  }

  .nav-links {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 26px;
    padding: 84px 32px 36px;
    background: var(--canvas);
    font-size: 28px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 0.24s ease, transform 0.24s ease;
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .nav-cta {
    margin-top: 10px;
    font-size: 16px;
  }

  .menu-button[aria-expanded="true"] span:first-child {
    transform: translateY(3.5px) rotate(45deg);
  }

  .menu-button[aria-expanded="true"] span:last-child {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  .principle-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-block: 34px;
  }

  .principle-points span {
    padding-left: 14px;
  }

  .feature-mosaic {
    grid-template-columns: 1fr;
  }

  .feature-local {
    grid-column: auto;
  }

  .security-layout,
  .faq {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .security-intro,
  .faq-title {
    position: static;
  }

  .download-panel {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 100px;
    gap: 28px;
  }

  .hero h1 {
    font-size: clamp(40px, 11.5vw, 54px);
  }

  .hero-lede {
    font-size: 16px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
  }

  .media-stack-panel {
    transform: translate(10px, 10px);
  }

  .principle-grid {
    min-height: auto;
  }

  .principle-points {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .principle-points span {
    min-height: 34px;
    display: flex;
    align-items: center;
  }

  .section {
    padding-block: 84px;
  }

  .section-heading {
    margin-bottom: 40px;
  }

  .feature-msg {
    min-height: 440px;
  }

  .feature-image {
    height: 40%;
  }

  .capability-list {
    gap: 0;
  }

  .security-flow li {
    grid-template-columns: 40px 1fr;
    gap: 18px;
  }

  .flow-marker {
    width: 40px;
    height: 40px;
  }

  .security-flow::before {
    left: 19px;
  }

  .download-panel {
    padding: 34px 26px;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
    row-gap: 34px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

/* ---------- Reduced motion & transparency ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header.scrolled {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--canvas);
  }
}