/* ==========================================================================
   avianlink.dev — liquid glass on Night
   Brand: Ink #14171C · Paper #F6F6F3 · Night #111318 · Moon #ECEEF1
   Typeface: Space Grotesk (brand) + IBM Plex Mono for wire data
   ========================================================================== */

:root {
  /* --- ground ------------------------------------------------------------ */
  --night: #111318;
  --void: #08090b;
  --ink: #14171c;
  --moon: #eceef1;
  --paper: #f6f6f3;

  /* --- text -------------------------------------------------------------- */
  --fg: #eceef1;
  --fg-strong: #fbfcfd;
  --fg-muted: #aab0bb;
  --fg-faint: #878e99;
  --fg-ghost: #656b76;

  /* --- glass ------------------------------------------------------------- */
  --glass-fill: linear-gradient(
    168deg,
    rgb(255 255 255 / 7.5%) 0%,
    rgb(255 255 255 / 3.2%) 46%,
    rgb(255 255 255 / 1.4%) 100%
  );
  --glass-fill-raised: linear-gradient(
    168deg,
    rgb(255 255 255 / 11%) 0%,
    rgb(255 255 255 / 4.5%) 48%,
    rgb(255 255 255 / 2%) 100%
  );
  --glass-edge: rgb(255 255 255 / 11%);
  --glass-edge-strong: rgb(255 255 255 / 18%);
  --glass-sheen: rgb(255 255 255 / 34%);
  --glass-blur: saturate(135%) blur(26px);

  --shadow-lift: 0 1px 0 rgb(255 255 255 / 6%) inset,
    0 -1px 0 rgb(0 0 0 / 22%) inset, 0 18px 48px -24px rgb(0 0 0 / 78%),
    0 2px 10px -4px rgb(0 0 0 / 50%);
  --shadow-float: 0 1px 0 rgb(255 255 255 / 10%) inset,
    0 -1px 0 rgb(0 0 0 / 26%) inset, 0 40px 90px -36px rgb(0 0 0 / 88%),
    0 4px 18px -6px rgb(0 0 0 / 55%);

  /* --- status (desaturated by design) ------------------------------------ */
  --status-queued: #6f757f;
  --status-sent: #a7adb8;
  --status-delivered: #eceef1;
  --status-failed: #c48b86;

  /* --- metrics ----------------------------------------------------------- */
  --rail: 1180px;
  --rail-narrow: 820px;
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 30px;

  --sans: "Space Grotesk", "Helvetica Neue", -apple-system,
    BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  color-scheme: dark;
}

/* ==========================================================================
   reset + base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
}

body {
  min-height: 100vh;
  background-color: var(--night);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: -0.003em;
  overflow-x: hidden;
  font-feature-settings: "ss01", "ss03";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

h1,
h2,
h3,
h4 {
  font-weight: 500;
  letter-spacing: -0.028em;
  line-height: 1.08;
  text-wrap: balance;
  color: var(--fg-strong);
}

p {
  text-wrap: pretty;
}

code,
kbd,
pre,
.mono {
  font-family: var(--mono);
  font-feature-settings: normal;
}

:focus-visible {
  outline: 2px solid var(--moon);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: rgb(236 238 241 / 88%);
  color: var(--ink);
}

/* ==========================================================================
   atmosphere — the light behind the glass
   ========================================================================== */

.sky {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(
      120% 80% at 50% -10%,
      rgb(39 44 54 / 95%) 0%,
      rgb(17 19 24 / 0%) 62%
    ),
    linear-gradient(180deg, #14171c 0%, #0f1115 55%, #08090b 100%);
}

.sky__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  will-change: transform;
}

.sky__glow--a {
  top: -22vh;
  left: 50%;
  width: 72vw;
  height: 58vh;
  background: radial-gradient(
    circle,
    rgb(188 198 214 / 20%) 0%,
    rgb(120 130 148 / 7%) 45%,
    transparent 72%
  );
  transform: translateX(-50%);
  animation: drift-a 34s var(--ease) infinite alternate;
}

.sky__glow--b {
  top: 46vh;
  left: -14vw;
  width: 46vw;
  height: 46vw;
  background: radial-gradient(
    circle,
    rgb(255 255 255 / 9%) 0%,
    transparent 68%
  );
  animation: drift-b 46s var(--ease) infinite alternate;
}

.sky__glow--c {
  top: 108vh;
  right: -16vw;
  width: 52vw;
  height: 52vw;
  background: radial-gradient(
    circle,
    rgb(166 178 196 / 11%) 0%,
    transparent 68%
  );
  animation: drift-c 52s var(--ease) infinite alternate;
}

@keyframes drift-a {
  to {
    transform: translate(-46%, 6vh) scale(1.12);
  }
}

@keyframes drift-b {
  to {
    transform: translate(10vw, -8vh) scale(1.18);
  }
}

@keyframes drift-c {
  to {
    transform: translate(-8vw, 6vh) scale(1.1);
  }
}

/* The grain that makes glass read as a material rather than a gradient. */
.sky::after {
  content: "";
  position: absolute;
  inset: -50%;
  opacity: 0.32;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

/* A faint horizontal rule field: "lines are packets". */
.sky__packets {
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image: repeating-linear-gradient(
    180deg,
    rgb(255 255 255 / 2.6%) 0px,
    rgb(255 255 255 / 2.6%) 1px,
    transparent 1px,
    transparent 7px
  );
  mask-image: radial-gradient(
    110% 70% at 50% 0%,
    #000 0%,
    rgb(0 0 0 / 0%) 70%
  );
}

/* ==========================================================================
   glass primitive
   ========================================================================== */

.glass {
  position: relative;
  background-image: var(--glass-fill);
  border: 1px solid var(--glass-edge);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lift);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  isolation: isolate;
}

/* The specular highlight along the top lip — what sells "liquid". */
.glass::before {
  content: "";
  position: absolute;
  inset-inline: 12%;
  top: -1px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--glass-sheen) 32%,
    var(--glass-sheen) 68%,
    transparent
  );
  pointer-events: none;
}

.glass--raised {
  background-image: var(--glass-fill-raised);
  border-color: var(--glass-edge-strong);
  box-shadow: var(--shadow-float);
}

/* ==========================================================================
   layout
   ========================================================================== */

.rail {
  width: 100%;
  max-width: var(--rail);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.section {
  position: relative;
  padding-block: clamp(4.5rem, 10vw, 8.5rem);
}

.section + .section {
  padding-top: 0;
}

.section__head {
  max-width: 62ch;
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  margin-bottom: 1.1rem;
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: linear-gradient(90deg, var(--fg-ghost), transparent);
}

.section__title {
  font-size: clamp(1.9rem, 4.4vw, 3rem);
}

.section__lede {
  margin-top: 1.1rem;
  color: var(--fg-muted);
  font-size: clamp(1rem, 1.6vw, 1.1875rem);
  line-height: 1.58;
}

.skip {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  border-radius: var(--r-sm);
  background: var(--moon);
  color: var(--ink);
  font-size: 0.875rem;
  font-weight: 500;
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease-out);
}

.skip:focus-visible {
  transform: none;
}

/* ==========================================================================
   nav
   ========================================================================== */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-block: 0.875rem;
}

.nav__glass {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.5rem 0.5rem 0.5rem 1.125rem;
  border-radius: 999px;
  --glass-blur: saturate(140%) blur(22px);
}

.nav__brand {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  color: var(--fg-strong);
}

.nav__brand svg,
.nav__brand img {
  height: 26px;
  width: auto;
}

.nav__links {
  display: flex;
  flex: 1 1 auto;
  gap: 0.25rem;
  justify-content: center;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav__link {
  display: block;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  color: var(--fg-muted);
  font-size: 0.875rem;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav__link:hover {
  background: rgb(255 255 255 / 7%);
  color: var(--fg-strong);
}

.nav__link[aria-current="true"] {
  background: rgb(255 255 255 / 9%);
  color: var(--fg-strong);
}

.nav__cta {
  flex: 0 0 auto;
}

/* ==========================================================================
   buttons + pills
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.18s var(--ease-out), background-color 0.2s var(--ease),
    border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--solid {
  background: linear-gradient(180deg, #ffffff 0%, var(--moon) 100%);
  color: var(--ink);
  box-shadow: 0 1px 0 rgb(255 255 255 / 90%) inset,
    0 10px 28px -12px rgb(236 238 241 / 40%);
}

.btn--solid:hover {
  box-shadow: 0 1px 0 rgb(255 255 255 / 90%) inset,
    0 14px 34px -12px rgb(236 238 241 / 52%);
}

.btn--glass {
  background-image: var(--glass-fill-raised);
  border-color: var(--glass-edge-strong);
  color: var(--fg-strong);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.btn--glass:hover {
  background-color: rgb(255 255 255 / 6%);
  border-color: rgb(255 255 255 / 28%);
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn__arrow {
  transition: transform 0.2s var(--ease-out);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.3rem 0.8rem 0.3rem 0.65rem;
  border: 1px solid var(--glass-edge);
  border-radius: 999px;
  background-image: var(--glass-fill);
  color: var(--fg-muted);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.pill__dot {
  position: relative;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--moon);
  flex: 0 0 auto;
}

.pill__dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgb(236 238 241 / 40%);
  animation: ping 2.8s var(--ease-out) infinite;
}

@keyframes ping {
  0% {
    opacity: 0.9;
    transform: scale(0.7);
  }
  70%,
  100% {
    opacity: 0;
    transform: scale(1.9);
  }
}

/* ==========================================================================
   hero
   ========================================================================== */

.hero {
  padding-top: clamp(3rem, 7vw, 5.5rem);
  padding-bottom: clamp(3.5rem, 8vw, 6rem);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}

.hero__mark {
  width: clamp(150px, 19vw, 220px);
  margin-bottom: 2rem;
  color: var(--moon);
  opacity: 0.95;
}

.hero__title {
  font-size: clamp(2.5rem, 6.4vw, 4.25rem);
  letter-spacing: -0.038em;
  line-height: 1.02;
}

.hero__title em {
  display: block;
  font-style: normal;
  background: linear-gradient(
    96deg,
    #ffffff 0%,
    #c9ced8 46%,
    #83899a 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lede {
  max-width: 48ch;
  margin-top: 1.5rem;
  color: var(--fg-muted);
  font-size: clamp(1.0625rem, 1.9vw, 1.3125rem);
  line-height: 1.52;
}

.hero__lede strong {
  color: var(--fg);
  font-weight: 500;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.hero__note {
  margin-top: 1.5rem;
  color: var(--fg-faint);
  font-size: 0.8125rem;
}

.hero__note code {
  color: var(--fg-muted);
  font-size: 0.78125rem;
}

/* --- the conditions strip ------------------------------------------------ */

.conditions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(3rem, 6vw, 4.5rem);
  overflow: hidden;
  border-radius: var(--r-lg);
  background: var(--glass-edge);
}

.conditions__cell {
  padding: 1.5rem clamp(1rem, 2vw, 1.75rem);
  background-color: rgb(255 255 255 / 3.5%);
  background-image: var(--glass-fill);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
}

.conditions__value {
  display: block;
  color: var(--fg-strong);
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1;
}

.conditions__value sup {
  margin-left: 0.14em;
  font-size: 0.5em;
  font-weight: 400;
  letter-spacing: 0;
  vertical-align: super;
  color: var(--fg-faint);
}

.conditions__label {
  display: block;
  margin-top: 0.6rem;
  color: var(--fg-faint);
  font-size: 0.8125rem;
  line-height: 1.4;
}

/* ==========================================================================
   app mock (hero right)
   ========================================================================== */

.mock {
  --glass-blur: saturate(130%) blur(34px);
  overflow: hidden;
  border-radius: var(--r-xl);
  font-size: 0.8125rem;
}

.mock__chrome {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgb(255 255 255 / 7%);
  background: rgb(255 255 255 / 3%);
}

.mock__dots {
  display: flex;
  gap: 0.375rem;
}

.mock__dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgb(255 255 255 / 15%);
}

.mock__title {
  margin-left: 0.5rem;
  color: var(--fg-faint);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
}

.mock__health {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: auto;
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.6875rem;
}

.mock__health i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--fg-muted);
  box-shadow: 0 0 8px 1px rgb(236 238 241 / 45%);
}

.mock__body {
  display: grid;
  grid-template-columns: 8.25rem minmax(0, 1fr);
  min-height: 24rem;
}

.mock__side {
  padding: 0.875rem 0.625rem;
  border-right: 1px solid rgb(255 255 255 / 6%);
  background: rgb(0 0 0 / 16%);
}

.mock__sidelabel {
  padding-inline: 0.5rem;
  margin-bottom: 0.625rem;
  color: var(--fg-ghost);
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mock__contact {
  padding: 0.5rem;
  border-radius: var(--r-sm);
  margin-bottom: 0.1875rem;
}

.mock__contact--on {
  background: rgb(255 255 255 / 8%);
  box-shadow: 0 1px 0 rgb(255 255 255 / 6%) inset;
}

.mock__name {
  color: var(--fg);
  font-size: 0.8125rem;
  font-weight: 500;
}

.mock__contact--on .mock__name {
  color: var(--fg-strong);
}

.mock__meta {
  margin-top: 0.1875rem;
  color: var(--fg-ghost);
  font-family: var(--mono);
  font-size: 0.625rem;
}

.mock__thread {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.125rem 1.125rem 0.875rem;
}

.msg {
  max-width: 82%;
  animation: msg-in 0.6s var(--ease-out) both;
}

.msg--out {
  align-self: flex-end;
  text-align: right;
}

.msg--in {
  align-self: flex-start;
}

.msg__text {
  color: var(--fg);
  font-size: 0.8125rem;
  line-height: 1.45;
}

.msg--out .msg__text {
  color: var(--fg-strong);
}

.msg__foot {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin-top: 0.3rem;
  color: var(--fg-ghost);
  font-family: var(--mono);
  font-size: 0.625rem;
}

.msg--out .msg__foot {
  justify-content: flex-end;
}

.msg__state {
  color: var(--status-sent);
  letter-spacing: -0.08em;
}

.msg__state--queued {
  color: var(--status-queued);
}

.msg__state--delivered {
  color: var(--status-delivered);
}

.msg__late {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.1rem 0.45rem;
  border: 1px solid rgb(255 255 255 / 10%);
  border-radius: 999px;
  color: var(--fg-faint);
}

.mock__divider {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--fg-ghost);
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mock__divider::before,
.mock__divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgb(255 255 255 / 7%);
}

.mock__composer {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.75rem;
  margin: auto 1.125rem 1.125rem;
  border: 1px solid rgb(255 255 255 / 10%);
  border-radius: 999px;
  background: rgb(255 255 255 / 4%);
  color: var(--fg-ghost);
  font-size: 0.8125rem;
}

.mock__caret {
  width: 1px;
  height: 1em;
  background: var(--fg-muted);
  animation: blink 1.2s steps(2, start) infinite;
}

.mock__send {
  display: grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  margin-left: auto;
  border-radius: 50%;
  background: var(--moon);
  color: var(--ink);
  font-size: 0.6875rem;
}

@keyframes blink {
  to {
    opacity: 0;
  }
}

@keyframes msg-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

/* ==========================================================================
   principles
   ========================================================================== */

.quote {
  padding: clamp(2rem, 5vw, 3.25rem);
  border-radius: var(--r-xl);
}

.quote blockquote {
  max-width: 34ch;
  font-size: clamp(1.75rem, 4vw, 2.625rem);
  font-weight: 500;
  letter-spacing: -0.032em;
  line-height: 1.1;
  color: var(--fg-strong);
}

.quote__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: center;
}

.consequences {
  display: grid;
  gap: 1.375rem;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: c;
}

.consequences li {
  position: relative;
  padding-left: 2.5rem;
  color: var(--fg-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
  counter-increment: c;
}

.consequences li::before {
  content: counter(c, decimal-leading-zero);
  position: absolute;
  top: 0.1em;
  left: 0;
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.consequences strong {
  display: block;
  color: var(--fg-strong);
  font-weight: 500;
}

/* ==========================================================================
   feature cards
   ========================================================================== */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16.5rem, 1fr));
  gap: 1rem;
}

.card {
  padding: 1.625rem 1.5rem;
  border-radius: var(--r-md);
  transition: transform 0.35s var(--ease-out), border-color 0.3s var(--ease),
    box-shadow 0.35s var(--ease-out);
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--glass-edge-strong);
  box-shadow: var(--shadow-float);
}

.card--wide {
  grid-column: span 2;
}

.card__icon {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: 1.125rem;
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: 10px;
  background: rgb(255 255 255 / 5%);
  color: var(--fg-strong);
}

.card__icon svg {
  width: 1.125rem;
  height: 1.125rem;
}

.card__title {
  font-size: 1.0625rem;
  letter-spacing: -0.022em;
}

.card__body {
  margin-top: 0.5rem;
  color: var(--fg-muted);
  font-size: 0.9062rem;
  line-height: 1.55;
}

.card__body code {
  padding: 0.08em 0.3em;
  border-radius: 4px;
  background: rgb(255 255 255 / 7%);
  color: var(--fg);
  font-size: 0.85em;
}

.card__tag {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ==========================================================================
   packet diagram
   ========================================================================== */

.wire {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

.panel {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border-radius: var(--r-xl);
}

.panel__title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 1.0625rem;
}

.panel__title span {
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.packet {
  display: flex;
  gap: 2px;
  margin-bottom: 0.75rem;
}

.packet__field {
  position: relative;
  padding: 0.75rem 0.5rem;
  border: 1px solid rgb(255 255 255 / 10%);
  background: rgb(255 255 255 / 4%);
  text-align: center;
  overflow: hidden;
}

.packet__field:first-child {
  border-radius: 8px 2px 2px 8px;
}

.packet__field:last-child {
  border-radius: 2px 8px 8px 2px;
}

.packet__field--cipher {
  flex: 1 1 auto;
  background: repeating-linear-gradient(
    115deg,
    rgb(255 255 255 / 9%) 0px,
    rgb(255 255 255 / 9%) 2px,
    rgb(255 255 255 / 3%) 2px,
    rgb(255 255 255 / 3%) 7px
  );
  border-color: rgb(255 255 255 / 16%);
}

.packet__name {
  display: block;
  color: var(--fg);
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.packet__field--cipher .packet__name {
  color: var(--fg-strong);
}

.packet__field--cipher .packet__size {
  color: var(--fg-muted);
}

.packet__size {
  display: block;
  margin-top: 0.25rem;
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.625rem;
}

.packet__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem 1.25rem;
  color: var(--fg-faint);
  font-size: 0.78125rem;
}

.packet__legend b {
  color: var(--fg-muted);
  font-weight: 400;
}

.frames {
  display: grid;
  gap: 0.375rem;
  margin-top: 1.75rem;
}

.frame {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 6rem) minmax(0, 1fr);
  gap: 0.75rem;
  align-items: baseline;
  padding: 0.625rem 0.875rem;
  border: 1px solid rgb(255 255 255 / 7%);
  border-radius: 8px;
  background: rgb(255 255 255 / 2.5%);
  font-size: 0.8125rem;
}

.frame--future {
  border-style: dashed;
  border-color: rgb(255 255 255 / 12%);
  background: transparent;
  opacity: 0.72;
}

.frame__type {
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.frame__name {
  color: var(--fg-strong);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.frame__desc {
  color: var(--fg-muted);
  font-size: 0.78125rem;
  line-height: 1.45;
}

/* ==========================================================================
   tables
   ========================================================================== */

.tablewrap {
  overflow-x: auto;
  margin-inline: calc(clamp(1.5rem, 3vw, 2.25rem) * -1);
  padding-inline: clamp(1.5rem, 3vw, 2.25rem);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  white-space: nowrap;
}

th,
td {
  padding: 0.6rem 0.875rem 0.6rem 0;
  text-align: right;
  border-bottom: 1px solid rgb(255 255 255 / 6%);
}

th:first-child,
td:first-child {
  text-align: left;
  padding-right: 1.5rem;
}

thead th {
  color: var(--fg-ghost);
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom-color: rgb(255 255 255 / 12%);
}

tbody td {
  color: var(--fg-muted);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

tbody td:first-child {
  color: var(--fg);
  font-family: var(--sans);
}

tbody tr:last-child td {
  border-bottom: none;
}

tr.is-chosen td {
  color: var(--fg-strong);
  background: rgb(255 255 255 / 5%);
}

tr.is-chosen td:first-child {
  position: relative;
  font-weight: 500;
}

.table__note {
  margin-top: 1rem;
  color: var(--fg-faint);
  font-size: 0.78125rem;
  line-height: 1.5;
}

/* ==========================================================================
   profiles
   ========================================================================== */

.profiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12.5rem, 1fr));
  gap: 1rem;
}

.profile {
  padding: 1.375rem 1.25rem;
  border-radius: var(--r-md);
}

.profile__name {
  color: var(--fg-strong);
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

.profile__what {
  margin-top: 0.4rem;
  margin-bottom: 1.125rem;
  color: var(--fg-faint);
  font-size: 0.78125rem;
  line-height: 1.45;
  min-height: 4.4em; /* keeps the spec rows aligned across cards */
}

.profile__specs {
  display: grid;
  gap: 0.3rem;
  margin: 0;
  font-size: 0.75rem;
}

.profile__specs div {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.3rem;
  border-top: 1px solid rgb(255 255 255 / 6%);
}

.profile__specs dt {
  color: var(--fg-faint);
}

.profile__specs dd {
  margin: 0;
  color: var(--fg-muted);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   security ledger
   ========================================================================== */

.ledger {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr));
  gap: 1rem;
}

.ledger__col {
  padding: 1.75rem 1.625rem;
  border-radius: var(--r-lg);
}

.ledger__col--no {
  background-image: linear-gradient(
    168deg,
    rgb(255 255 255 / 3.5%) 0%,
    rgb(255 255 255 / 1%) 100%
  );
}

.ledger__head {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding-bottom: 1.125rem;
  margin-bottom: 1.125rem;
  border-bottom: 1px solid rgb(255 255 255 / 9%);
  font-size: 0.9375rem;
  letter-spacing: -0.015em;
}

.ledger__badge {
  display: grid;
  place-items: center;
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 50%;
  border: 1px solid rgb(255 255 255 / 20%);
  color: var(--fg-strong);
  font-family: var(--mono);
  font-size: 0.75rem;
  flex: 0 0 auto;
}

.ledger__col--no .ledger__badge {
  border-color: rgb(255 255 255 / 12%);
  color: var(--fg-faint);
}

.ledger__list {
  display: grid;
  gap: 0.9375rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.ledger__list li {
  color: var(--fg-muted);
  font-size: 0.875rem;
  line-height: 1.5;
}

.ledger__list b {
  color: var(--fg-strong);
  font-weight: 500;
}

.ledger__col--no .ledger__list li {
  color: var(--fg-faint);
}

.ledger__col--no .ledger__list b {
  color: var(--fg-muted);
}

.keyschedule {
  margin-top: 1rem;
  padding: 1.375rem 1.5rem;
  border-radius: var(--r-md);
  overflow-x: auto;
}

.keyschedule pre {
  color: var(--fg-muted);
  font-size: 0.78125rem;
  line-height: 1.85;
}

.keyschedule b {
  color: var(--fg-strong);
  font-weight: 400;
}

.keyschedule i {
  color: var(--fg-faint);
  font-style: normal;
}

.fingerprint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  color: var(--fg-faint);
  font-size: 0.8125rem;
}

.fingerprint code {
  padding: 0.35rem 0.7rem;
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: 8px;
  background: rgb(255 255 255 / 5%);
  color: var(--fg-strong);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
}

/* ==========================================================================
   message-state rows
   ========================================================================== */

.states {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border-radius: var(--r-md);
  background: rgb(255 255 255 / 8%);
}

.state {
  display: grid;
  grid-template-columns: 3.5rem 7rem minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  background-color: rgb(255 255 255 / 3%);
  background-image: var(--glass-fill);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.state__glyph {
  font-family: var(--mono);
  font-size: 1.125rem;
  letter-spacing: -0.1em;
  text-align: center;
}

.state__name {
  color: var(--fg-strong);
  font-size: 0.9375rem;
  font-weight: 500;
}

.state__means {
  color: var(--fg-muted);
  font-size: 0.875rem;
  line-height: 1.45;
}

/* ==========================================================================
   roadmap
   ========================================================================== */

.phases {
  position: relative;
  display: grid;
  gap: 0.5rem;
}

.phase {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 11rem) minmax(0, 1fr) auto;
  gap: 1.25rem;
  align-items: baseline;
  padding: 1.0625rem 1.375rem;
  border-radius: var(--r-md);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.phase:hover {
  border-color: var(--glass-edge-strong);
}

.phase--todo {
  border-style: dashed;
  box-shadow: none;
  background-image: none;
  background-color: rgb(255 255 255 / 1.5%);
}

.phase__n {
  color: var(--fg-ghost);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.phase--done .phase__n {
  color: var(--fg-muted);
}

.phase__name {
  color: var(--fg-strong);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.015em;
}

.phase--todo .phase__name {
  color: var(--fg-muted);
}

.phase__desc {
  color: var(--fg-faint);
  font-size: 0.8125rem;
  line-height: 1.45;
}

.phase__state {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--fg-ghost);
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.phase--done .phase__state {
  color: var(--fg-muted);
}

.phase__state::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid currentColor;
}

.phase--done .phase__state::before {
  background: var(--moon);
  border-color: var(--moon);
}

/* ==========================================================================
   closing
   ========================================================================== */

.cta {
  position: relative;
  overflow: hidden;
  padding: clamp(2.75rem, 6vw, 4.5rem) clamp(1.75rem, 5vw, 4rem);
  border-radius: var(--r-xl);
  text-align: center;
}

.cta::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(
    80% 120% at 50% 0%,
    rgb(255 255 255 / 10%) 0%,
    transparent 70%
  );
}

.cta__mark {
  width: 120px;
  margin: 0 auto 1.75rem;
  color: var(--moon);
  opacity: 0.8;
}

.cta__title {
  font-size: clamp(1.75rem, 4.2vw, 2.75rem);
}

.cta__lede {
  max-width: 48ch;
  margin: 1rem auto 0;
  color: var(--fg-muted);
  font-size: 1.0625rem;
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2.25rem;
}

/* ==========================================================================
   footer
   ========================================================================== */

.footer {
  padding-block: 3rem 3.5rem;
  border-top: 1px solid rgb(255 255 255 / 7%);
  margin-top: clamp(4rem, 8vw, 6rem);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2.5rem clamp(2rem, 8vw, 6rem);
  align-items: start;
}

.footer__brand svg,
.footer__brand img {
  height: 22px;
  width: auto;
  color: var(--fg-faint);
}

.footer__tag {
  margin-top: 0.875rem;
  max-width: 34ch;
  color: var(--fg-faint);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.footer__cols {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
}

.footer__col h3 {
  margin-bottom: 0.875rem;
  color: var(--fg-faint);
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.footer__col ul {
  display: grid;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.footer__col a,
.footer__col span {
  color: var(--fg-muted);
  font-size: 0.8125rem;
  transition: color 0.18s var(--ease);
}

.footer__col a:hover {
  color: var(--fg-strong);
}

.footer__col span {
  color: var(--fg-faint);
}

.footer__fine {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  padding-top: 2.25rem;
  margin-top: 2.5rem;
  border-top: 1px solid rgb(255 255 255 / 5%);
  color: var(--fg-faint);
  font-size: 0.75rem;
}

/* ==========================================================================
   reveal on scroll
   ========================================================================== */

/* Hidden only once JS is confirmed, so a failed script never blanks a section. */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out);
}

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   pointer-tracked sheen
   ========================================================================== */

.has-sheen::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  opacity: var(--sheen, 0);
  background: radial-gradient(
    22rem 22rem at var(--mx, 50%) var(--my, 0%),
    rgb(255 255 255 / 9%) 0%,
    rgb(255 255 255 / 3%) 34%,
    transparent 68%
  );
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}

/* ==========================================================================
   responsive
   ========================================================================== */

@media (max-width: 1040px) {
  .hero__grid,
  .quote__grid,
  .wire {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero__mark {
    margin-bottom: 1.5rem;
  }

  .mock {
    max-width: 34rem;
  }

  .card--wide {
    grid-column: auto;
  }

  .nav__links {
    display: none;
  }

  .nav__glass {
    justify-content: space-between;
  }
}

@media (max-width: 760px) {
  .footer__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer__cols {
    gap: 2.5rem;
  }

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

  .phase {
    grid-template-columns: 2.25rem minmax(0, 1fr);
    gap: 0.5rem 1rem;
  }

  .phase__desc {
    grid-column: 2;
  }

  .phase__state {
    grid-column: 2;
    margin-top: 0.25rem;
  }

  .state {
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: 0.25rem 1rem;
  }

  .state__means {
    grid-column: 2;
  }

  .frame {
    grid-template-columns: 3rem minmax(0, 1fr);
  }

  .frame__desc {
    grid-column: 2;
  }

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

  .mock__side {
    display: none;
  }
}

@media (max-width: 420px) {
  .packet {
    font-size: 0.9em;
  }

  .packet__field {
    padding-inline: 0.3rem;
  }
}

/* ==========================================================================
   motion + fallbacks
   ========================================================================== */

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Browsers without backdrop-filter get solid, still-legible panels. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass,
  .conditions__cell,
  .state,
  .btn--glass,
  .pill {
    background-color: #1a1e25;
  }
}

@media print {
  .sky,
  .nav,
  .mock {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }
}