@import url("https://fonts.googleapis.com/css2?family=Bodoni+Moda:opsz,wght@6..96,500;6..96,600&family=IBM+Plex+Mono:wght@400;500;600&display=swap");

:root {
  color-scheme: dark;
  --ink: #050505;
  --panel: rgba(15, 14, 11, 0.78);
  --paper: #f4efdf;
  --muted: #9b978c;
  --gold: #f3ba2f;
  --gold-soft: #dca92f;
  --line: rgba(243, 186, 47, 0.24);
  --line-soft: rgba(244, 239, 223, 0.12);
  --display: "Bodoni Moda", "Iowan Old Style", Baskerville, serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--ink);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--paper);
  background:
    radial-gradient(circle at 76% 30%, rgba(243, 186, 47, 0.09), transparent 29rem),
    radial-gradient(circle at 20% 82%, rgba(243, 186, 47, 0.05), transparent 34rem),
    #050505;
  font-family: var(--mono);
}

button {
  font: inherit;
}

.noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.16;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.26'/%3E%3C/svg%3E");
}

.trace-field {
  position: fixed;
  inset: 0;
  z-index: -2;
  opacity: 0.32;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 86%);
}

.shell {
  width: min(1440px, calc(100% - 64px));
  margin: 0 auto;
  padding: 28px 0 34px;
}

.masthead,
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.masthead {
  height: 56px;
}

.protocol-mark,
.block-clock,
.footer > div {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-actions,
.chain-mode {
  display: flex;
  align-items: center;
}

.header-actions { gap: 20px; }
.chain-mode { gap: 8px; color: var(--gold); }
.mode-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 12px rgba(243, 186, 47, 0.8);
}
.chain-mode[data-mode="chain"] .mode-dot {
  background: #48d597;
  box-shadow: 0 0 12px rgba(72, 213, 151, 0.8);
}
.chain-mode[data-mode="offline"] .mode-dot {
  background: #ee6b54;
  box-shadow: 0 0 12px rgba(238, 107, 84, 0.72);
}
.language-toggle {
  min-height: 30px;
  padding: 0 10px;
  border-color: var(--line-soft);
}

.signal-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 18px var(--gold);
  animation: pulse 1.4s ease-in-out infinite;
}

.block-clock strong {
  color: var(--gold);
  font-weight: 500;
}

.hero {
  min-height: 585px;
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  align-items: center;
  gap: 5vw;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.24em;
}

h1 {
  display: flex;
  align-items: baseline;
  margin: -10px 0 30px;
  font-family: var(--display);
  font-size: clamp(94px, 13vw, 210px);
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.88;
}

h1 span[data-letter] {
  position: relative;
  color: rgba(244, 239, 223, 0.22);
  text-shadow: 0 0 0 transparent;
  transition: color 450ms ease, text-shadow 450ms ease, transform 450ms ease;
}

h1 span[data-letter].active {
  color: var(--paper);
  text-shadow: 0 0 44px rgba(243, 186, 47, 0.28);
  transform: translateY(-5px);
}

h1 span[data-letter].active::after {
  content: "";
  position: absolute;
  left: 15%;
  right: 8%;
  bottom: -16px;
  height: 3px;
  background: var(--gold);
  box-shadow: 0 0 18px rgba(243, 186, 47, 0.72);
}

.word-gap {
  width: 0.22em;
}

.dedication {
  max-width: 470px;
  margin: 0;
  color: #bcb7aa;
  font-family: var(--display);
  font-size: clamp(22px, 2.5vw, 37px);
  line-height: 1.3;
}

.beacon-stage {
  position: relative;
  width: min(440px, 34vw);
  aspect-ratio: 1;
  justify-self: center;
  display: grid;
  place-items: center;
}

.orbit {
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.orbit-outer {
  inset: 0;
}

.orbit-inner {
  inset: 18%;
  border-style: dashed;
  animation: orbit 20s linear infinite;
}

.diamond-cluster {
  position: relative;
  width: 48%;
  aspect-ratio: 1;
  filter: drop-shadow(0 0 26px rgba(243, 186, 47, 0.14));
}

.diamond {
  position: absolute;
  width: 26%;
  aspect-ratio: 1;
  background: rgba(243, 186, 47, 0.12);
  border: 1px solid rgba(243, 186, 47, 0.48);
  transform: rotate(45deg);
  transition: background 420ms ease, box-shadow 420ms ease, transform 420ms ease;
}

.diamond.active,
.diamond.center.pulse {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 34px rgba(243, 186, 47, 0.72);
  transform: rotate(45deg) scale(1.08);
}

.diamond.north { left: 37%; top: 0; }
.diamond.east { right: 0; top: 37%; }
.diamond.south { left: 37%; bottom: 0; }
.diamond.west { left: 0; top: 37%; }
.diamond.center { left: 37%; top: 37%; }

.frame-caption {
  position: absolute;
  bottom: -14px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.24em;
}

.signal-panel {
  padding: 64px 0 56px;
}

.panel-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 30px;
}

h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(38px, 5vw, 72px);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.controls {
  display: flex;
  gap: 8px;
}

button {
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  color: var(--paper);
  background: transparent;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  transition: transform 160ms ease, color 160ms ease, background 160ms ease;
}

button:hover {
  transform: translateY(-2px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
  transform: none;
}

button.primary {
  color: #0b0a07;
  background: var(--gold);
  border-color: var(--gold);
}

.readout-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line-soft);
}

.readout {
  min-height: 190px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--panel);
}

.readout span,
.footer span,
.chain-proof dt {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.readout strong {
  color: var(--paper);
  font-family: var(--display);
  font-size: clamp(36px, 4.2vw, 64px);
  font-weight: 500;
  letter-spacing: -0.03em;
}

.readout small {
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.bit-card strong {
  font-family: var(--mono);
  letter-spacing: 0.16em;
}

.chain-proof {
  padding: 28px 24px 24px;
  border: 1px solid var(--line-soft);
  border-top: 0;
  background: rgba(8, 8, 7, 0.68);
}

.proof-heading {
  display: grid;
  grid-template-columns: 1fr minmax(280px, 0.7fr);
  align-items: end;
  gap: 36px;
  margin-bottom: 30px;
}

.proof-heading .eyebrow {
  margin-bottom: 10px;
}

.proof-heading h3 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(30px, 3.4vw, 48px);
  font-weight: 500;
  letter-spacing: -0.035em;
}

.proof-context > p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.75;
}

.proof-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 12px;
}

.proof-links a {
  color: var(--gold);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-decoration: none;
}

.proof-links a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.receipt-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line-soft);
}

.receipt-grid > div {
  min-width: 0;
  padding: 18px;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

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

.receipt-grid dt {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.14em;
}

.receipt-grid dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--paper);
  font-size: 12px;
  line-height: 1.55;
}

.receipt-grid a {
  color: var(--paper);
  text-decoration-color: var(--line);
  text-underline-offset: 4px;
}

.receipt-grid .receipt-output dd {
  color: var(--gold);
  font-size: 18px;
  letter-spacing: 0.08em;
}

.call-status {
  margin: 18px 0 0;
  color: var(--gold);
  font-size: 11px;
  line-height: 1.6;
}

.footer {
  min-height: 86px;
}

.footer a {
  color: var(--paper);
  text-decoration: none;
}

.footer p {
  margin: 0;
  color: var(--paper);
}

.footer b {
  color: var(--gold);
}

@keyframes pulse {
  50% { opacity: 0.35; transform: scale(0.78); }
}

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

/* Desktop recording composition: the complete story fits inside one 16:9 viewport. */
@media (min-width: 1100px) and (min-height: 650px) {
  html,
  body {
    height: 100%;
    overflow: hidden;
  }

  .shell {
    width: min(1540px, calc(100% - 48px));
    height: 100dvh;
    margin: 0 auto;
    padding: 16px 0;
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(600px, 1.1fr);
    grid-template-rows: 50px minmax(0, 1fr) 62px;
    column-gap: clamp(28px, 3vw, 52px);
  }

  .masthead {
    grid-column: 1 / -1;
    grid-row: 1;
    height: 50px;
  }

  .hero {
    grid-column: 1;
    grid-row: 2;
    position: relative;
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    grid-template-rows: auto auto auto;
    align-content: center;
    align-items: start;
    column-gap: 0;
    row-gap: 0;
    min-height: 0;
    padding: 24px clamp(56px, 4.5vw, 72px) 20px;
    border-bottom: 0;
  }

  .hero::before {
    content: none;
  }

  .hero-copy {
    display: contents;
  }

  .wordmark-block {
    grid-column: 1;
    grid-row: 1;
    position: relative;
    z-index: 2;
    width: max-content;
    max-width: 100%;
    text-align: left;
  }

  .hero .eyebrow {
    margin: 0 0 clamp(16px, 2.2vh, 24px);
    text-align: left;
  }

  h1 {
    justify-content: flex-start;
    width: 100%;
    margin: 0 0 clamp(20px, 3vh, 32px);
    font-size: clamp(88px, 9vw, 150px);
  }

  .dedication {
    grid-column: 1 / -1;
    grid-row: 2;
    max-width: 520px;
    margin: 0;
    text-align: left;
    font-size: clamp(20px, 1.8vw, 29px);
  }

  .beacon-stage {
    grid-column: 1;
    grid-row: 3;
    position: relative;
    right: auto;
    bottom: auto;
    width: min(190px, 24vh);
    justify-self: center;
    margin: clamp(20px, 3.2vh, 36px) 0 0;
  }

  .frame-caption {
    bottom: -30px;
  }

  .signal-panel {
    grid-column: 2;
    grid-row: 2;
    min-height: 0;
    padding: clamp(20px, 2.5vh, 30px) 0 14px;
    align-self: center;
  }

  .panel-heading {
    margin-bottom: 18px;
  }

  .panel-heading .eyebrow {
    margin-bottom: 10px;
  }

  h2 {
    font-size: clamp(38px, 3.4vw, 56px);
  }

  html[lang="en"] h2 {
    white-space: nowrap;
    font-size: clamp(32px, 2.65vw, 44px);
    letter-spacing: -0.03em;
  }

  .readout {
    min-height: 126px;
    padding: 16px;
  }

  .readout strong {
    font-size: clamp(32px, 3vw, 46px);
  }

  .chain-proof {
    padding: 16px;
  }

  .proof-heading {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 22px;
    margin-bottom: 14px;
  }

  .proof-heading h3 {
    font-size: clamp(24px, 1.75vw, 29px);
  }

  .proof-links {
    margin-top: 7px;
  }

  .receipt-grid > div {
    padding: 9px 11px;
  }

  .receipt-grid dt {
    margin-bottom: 6px;
  }

  .receipt-grid dd {
    font-size: 10px;
    line-height: 1.35;
  }

  .receipt-grid .receipt-output dd {
    font-size: 15px;
  }

  .call-status {
    margin-top: 10px;
  }

  .footer {
    grid-column: 1 / -1;
    grid-row: 3;
    min-height: 62px;
  }
}

@media (max-width: 900px) {
  .shell {
    width: min(100% - 34px, 720px);
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 90px 0 70px;
  }

  .beacon-stage {
    width: min(82vw, 390px);
    margin-top: 36px;
  }

  .panel-heading {
    align-items: start;
    flex-direction: column;
  }

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

  .readout {
    min-height: 160px;
  }

  .proof-heading {
    grid-template-columns: 1fr;
    align-items: start;
  }

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

@media (max-width: 560px) {
  .masthead {
    height: auto;
    min-height: 62px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  .hero {
    min-height: 0;
    padding-top: 78px;
  }

  h1 {
    font-size: clamp(76px, 25vw, 116px);
    flex-wrap: wrap;
  }

  .word-gap {
    width: 0.15em;
  }

  .controls {
    width: 100%;
  }

  .controls button {
    flex: 1;
  }

  .chain-proof {
    padding-inline: 16px;
  }

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

  .receipt-grid .receipt-wide {
    grid-column: span 1;
  }

  .receipt-grid > div {
    padding: 16px;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 14px;
    padding: 22px 0;
  }
}

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