:root {
  color-scheme: light;
  --ink: #151b2d;
  --muted: #626b7d;
  --paper: #fbfcff;
  --cyan: #76d5ef;
  --green: #77dfb0;
  --pink: #ff8daf;
  --amber: #f3cd63;
  --indigo: #7f8cff;
  --line: rgba(21, 27, 45, 0.13);
  --shadow: 0 24px 80px rgba(26, 42, 76, 0.16);
  --radius: 8px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 84% 12%, rgba(127, 140, 255, 0.28), transparent 26rem),
    radial-gradient(circle at 12% 28%, rgba(118, 213, 239, 0.36), transparent 30rem),
    linear-gradient(135deg, #fbfcff 0%, #eefbff 42%, #fff5f9 100%);
  color: var(--ink);
  font-family: var(--font);
}

@supports (overflow: clip) {
  html,
  body {
    overflow-x: clip;
  }
}

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

::selection {
  background: var(--cyan);
  color: var(--ink);
}

.light-field {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

#proof {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.56;
}

.veil {
  position: absolute;
  width: 72vw;
  height: 22vh;
  border-radius: 999px;
  filter: blur(12px);
  opacity: 0.36;
  transform: rotate(-18deg);
}

.veil-a {
  left: -18vw;
  top: 24vh;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.veil-b {
  right: -22vw;
  bottom: 18vh;
  background: linear-gradient(90deg, transparent, var(--pink), transparent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0;
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.language-toggle {
  border: 1px solid rgba(255, 255, 255, 0.68);
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 14px 44px rgba(26, 42, 76, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 6px 13px 6px 7px;
  border-radius: 999px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
}

.nav-links {
  display: flex;
  gap: 6px;
  padding: 6px;
  border-radius: 999px;
}

.nav-links a {
  min-height: 34px;
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(21, 27, 45, 0.08);
  color: var(--ink);
}

.language-toggle {
  min-width: 52px;
  min-height: 44px;
  border-radius: 999px;
  color: var(--ink);
  cursor: pointer;
  font: 800 14px/1 var(--font);
}

.section {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(280px, 0.96fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: center;
  min-height: calc(100svh - 86px);
  padding: clamp(48px, 7vw, 92px) 0 clamp(64px, 8vw, 108px);
}

.eyebrow {
  margin: 0 0 14px;
  color: #237d93;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 7.2vw, 96px);
  line-height: 0.9;
  letter-spacing: 0;
  white-space: nowrap;
}

h2 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(31px, 5vw, 70px);
  line-height: 1;
  letter-spacing: 0;
}

.hero-text {
  max-width: 670px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2.1vw, 24px);
  line-height: 1.58;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(26, 42, 76, 0.13);
}

.button.primary {
  background: var(--ink);
  color: var(--paper);
}

.button.ghost {
  background: rgba(255, 255, 255, 0.64);
}

.valid-object {
  position: relative;
  display: grid;
  min-height: min(58vw, 540px);
  place-items: center;
  transform-style: preserve-3d;
}

.halo {
  position: absolute;
  width: min(86vw, 470px);
  aspect-ratio: 1;
  border: 1px solid rgba(21, 27, 45, 0.14);
  border-radius: 50%;
  animation: turn 22s linear infinite;
}

.halo-two {
  width: min(68vw, 370px);
  border-color: rgba(255, 141, 175, 0.26);
  transform: rotateX(68deg) rotateZ(20deg);
  animation: turnTilt 17s linear infinite;
}

.checkmark {
  display: grid;
  width: min(72vw, 340px);
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 26%, rgba(119, 223, 176, 0.48), transparent 9rem),
    radial-gradient(circle at 72% 78%, rgba(255, 141, 175, 0.38), transparent 10rem),
    rgba(255, 255, 255, 0.52);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.checkmark svg {
  width: 58%;
  overflow: visible;
}

.checkmark path {
  fill: none;
  stroke: var(--ink);
  stroke-width: 18;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.name-strip {
  position: absolute;
  left: 50%;
  bottom: 13%;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 7px;
  width: min(88vw, 500px);
  padding: 9px;
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow);
  transform: translateX(-50%);
  backdrop-filter: blur(20px);
}

.name-strip span {
  display: grid;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 50%;
  background: #dcf8ff;
  font-size: clamp(20px, 3.5vw, 38px);
  font-weight: 800;
}

.name-strip span:nth-child(3),
.name-strip span:nth-child(6) {
  background: #e6e8ff;
}

.name-strip span:nth-child(4),
.name-strip span:nth-child(7) {
  background: #ffe0ea;
}

.letters,
.signal,
.note {
  padding: clamp(62px, 9vw, 114px) 0;
}

.section-heading {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(28px, 5vw, 48px);
}

.letter-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.letter-grid article {
  display: grid;
  min-height: 180px;
  align-content: space-between;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 18px 46px rgba(26, 42, 76, 0.08);
  transition: transform 190ms ease, background 190ms ease;
}

.letter-grid article:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.84);
}

.letter-grid strong {
  font-size: clamp(42px, 6vw, 78px);
  line-height: 0.9;
}

.letter-grid span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.35;
}

.signal {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
  gap: clamp(28px, 6vw, 78px);
  align-items: center;
}

.signal-copy p:not(.eyebrow),
.note p:not(.eyebrow) {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.72;
}

.tone-list {
  display: grid;
  gap: 10px;
  max-width: 640px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.tone-list li {
  padding: 15px 16px;
  border-left: 5px solid var(--cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(255, 255, 255, 0.56);
  font-weight: 800;
}

.tone-list li:nth-child(2) {
  border-left-color: var(--green);
}

.tone-list li:nth-child(3) {
  border-left-color: var(--pink);
}

.signal-panel {
  position: relative;
  display: grid;
  min-height: 430px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: center;
  padding: 22px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.38)),
    repeating-linear-gradient(90deg, rgba(21, 27, 45, 0.06) 0 1px, transparent 1px 32px);
  box-shadow: var(--shadow);
  transform-style: preserve-3d;
}

.scanner {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(118, 213, 239, 0.28), transparent);
  animation: scan 4s ease-in-out infinite;
}

.chip {
  position: relative;
  display: grid;
  min-height: 92px;
  place-items: center;
  border: 1px solid rgba(21, 27, 45, 0.08);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  font-size: clamp(20px, 4vw, 36px);
  font-weight: 800;
}

.note {
  max-width: 960px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 38px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes turn {
  to {
    transform: rotate(360deg);
  }
}

@keyframes turnTilt {
  to {
    transform: rotateX(68deg) rotateZ(-340deg);
  }
}

@keyframes scan {
  0%,
  100% {
    transform: translateY(-70%);
  }

  50% {
    transform: translateY(70%);
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero,
  .signal {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  .valid-object {
    min-height: 430px;
  }

  .letter-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .site-header,
  .section,
  .site-footer {
    width: min(100% - 24px, 1180px);
  }

  .site-header {
    gap: 10px;
    padding: 12px 0;
  }

  .brand {
    max-width: calc(100% - 66px);
    min-width: 0;
  }

  .brand span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .hero {
    padding-top: 34px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .valid-object {
    min-height: 340px;
  }

  .name-strip {
    gap: 5px;
    padding: 7px;
  }

  .letter-grid {
    grid-template-columns: 1fr;
  }

  .letter-grid article {
    min-height: 146px;
  }

  .signal-panel {
    min-height: 320px;
    padding: 14px;
  }

  .chip {
    min-height: 76px;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 2026 tech refresh */
:root {
  color-scheme: dark;
  --ink: #f4f8ff;
  --muted: #9daec8;
  --paper: #07101f;
  --cyan: #31dbff;
  --green: #31f3b7;
  --pink: #ff5ca8;
  --amber: #f6d66e;
  --indigo: #8e7dff;
  --line: rgba(151, 217, 255, 0.22);
  --shadow: 0 24px 88px rgba(0, 0, 0, 0.44);
}

body {
  background:
    linear-gradient(90deg, rgba(49, 219, 255, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(49, 219, 255, 0.055) 1px, transparent 1px),
    radial-gradient(circle at 16% 22%, rgba(49, 219, 255, 0.24), transparent 30rem),
    radial-gradient(circle at 78% 16%, rgba(142, 125, 255, 0.24), transparent 29rem),
    radial-gradient(circle at 84% 74%, rgba(255, 92, 168, 0.18), transparent 30rem),
    #07101f;
  background-size: 42px 42px, 42px 42px, auto, auto, auto, auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(115deg, transparent 0 34%, rgba(49, 219, 255, 0.12) 35%, transparent 39%),
    linear-gradient(250deg, transparent 0 58%, rgba(255, 92, 168, 0.1) 59%, transparent 62%);
  mix-blend-mode: screen;
}

#proof {
  opacity: 0.72;
}

.veil {
  opacity: 0.62;
  filter: blur(7px);
}

.brand,
.nav-links,
.language-toggle,
.button.ghost,
.letter-grid article,
.signal-panel,
.tone-list li {
  border-color: rgba(151, 217, 255, 0.22);
  background: linear-gradient(145deg, rgba(12, 28, 52, 0.78), rgba(7, 16, 31, 0.55));
  box-shadow: 0 18px 58px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(22px);
}

.brand-mark,
.button.primary {
  background: linear-gradient(135deg, #31dbff, #31f3b7);
  color: #06101f;
}

.nav-links a,
.hero-text,
.signal-copy p:not(.eyebrow),
.note p:not(.eyebrow),
.letter-grid span,
.site-footer {
  color: var(--muted);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(49, 219, 255, 0.12);
  color: var(--ink);
}

.eyebrow {
  color: var(--cyan);
  text-shadow: 0 0 22px rgba(49, 219, 255, 0.42);
}

h1,
h2 {
  color: var(--ink);
  text-shadow: 0 0 34px rgba(49, 219, 255, 0.2);
}

.valid-object::before {
  content: "";
  position: absolute;
  width: min(82vw, 480px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(from 120deg, rgba(49, 219, 255, 0.22), transparent, rgba(255, 92, 168, 0.2), transparent);
  filter: blur(18px);
  animation: turn 16s linear infinite;
}

.halo {
  border-color: rgba(49, 219, 255, 0.34);
  box-shadow: 0 0 50px rgba(49, 219, 255, 0.12), inset 0 0 68px rgba(49, 243, 183, 0.08);
}

.halo-two {
  border-color: rgba(255, 92, 168, 0.42);
}

.checkmark {
  border-color: rgba(151, 217, 255, 0.28);
  background:
    radial-gradient(circle at 30% 26%, rgba(49, 243, 183, 0.22), transparent 9rem),
    radial-gradient(circle at 72% 78%, rgba(255, 92, 168, 0.18), transparent 10rem),
    rgba(8, 21, 41, 0.72);
}

.checkmark path {
  stroke: var(--ink);
  filter: drop-shadow(0 0 14px rgba(49, 219, 255, 0.34));
}

.name-strip {
  border-color: rgba(151, 217, 255, 0.28);
  background: rgba(8, 21, 41, 0.76);
}

.name-strip span {
  color: #06101f;
  box-shadow: 0 0 26px rgba(49, 219, 255, 0.15), inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.letter-grid article {
  position: relative;
  overflow: hidden;
}

.letter-grid article::after {
  content: "";
  position: absolute;
  inset: auto 18px 14px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  opacity: 0.72;
}

.letter-grid strong,
.chip {
  color: var(--ink);
  text-shadow: 0 0 28px rgba(49, 219, 255, 0.2);
}

.chip {
  border-color: rgba(151, 217, 255, 0.18);
  background: rgba(8, 21, 41, 0.7);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-top: 1px solid rgba(151, 217, 255, 0.16);
}

.footer-tone {
  justify-self: end;
}

.icp-link {
  justify-self: center;
  color: rgba(244, 248, 255, 0.78);
  font-weight: 800;
  transition: color 180ms ease, text-shadow 180ms ease;
}

.icp-link:hover,
.icp-link:focus-visible {
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(49, 219, 255, 0.5);
}

@media (max-width: 560px) {
  .site-footer {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-tone {
    justify-self: center;
  }
}