/* ==========================================================================
   SIGNAL ROOM — the page is the receiver; scrolling tunes it.
   Two colours plus near-black. One accent, and it only appears at lock.
   ========================================================================== */

/* --- Self-hosted faces ------------------------------------------------- */
@font-face {
  font-family: "Archivo Black";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./fonts/archivo-black-400.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./fonts/ibm-plex-mono-400.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("./fonts/ibm-plex-mono-500.woff2") format("woff2");
}

/* --- Tokens ------------------------------------------------------------ */
:root {
  --bg: #08090b;
  --ink: #e9e6df;
  --accent: #ffb000;          /* reserved for the lock */
  --hair: rgba(233, 230, 223, 0.16);
  --hair-soft: rgba(233, 230, 223, 0.08);
  --dim: rgba(233, 230, 223, 0.62);
  --faint: rgba(233, 230, 223, 0.34);
  --ghost: rgba(233, 230, 223, 0.16);

  --font-display: "Archivo Black", "Arial Black", Impact, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --fs-mega: clamp(4rem, 22vw, 19rem);
  --fs-statement: clamp(2rem, 7.2vw, 6rem);
  --fs-passage: clamp(1rem, 0.95rem + 0.3vw, 1.22rem);
  --fs-note: clamp(0.66rem, 0.62rem + 0.16vw, 0.74rem);
  --fs-title: clamp(0.82rem, 0.78rem + 0.2vw, 0.98rem);

  --gutter: clamp(1.1rem, 3.4vw, 3rem);
  --chrome-h: 3.25rem;
  --dial-h: 5.75rem;
  --bleed: 7vw;

  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: clamp(4rem, 10vh, 7rem);

  --dur-fast: 180ms;
  --dur-slow: 900ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1);

  --tune: 0;    /* dial position 0–1, written by the loop */
}

/* --- Reset ------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background: var(--bg);
  color-scheme: dark;
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  min-width: 320px;
  padding-top: var(--chrome-h);
  padding-bottom: calc(var(--dial-h) + env(safe-area-inset-bottom, 0px));
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--fs-passage);
  line-height: 1.6;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "tnum" 1;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

::selection {
  background: var(--accent);
  color: var(--bg);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 40;
  padding: var(--space-2) var(--space-4);
  background: var(--accent);
  color: var(--bg);
  font-size: var(--fs-note);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transform: translateY(-250%);
  transition: transform var(--dur-fast) var(--ease-out);
}

.skip-link:focus {
  transform: translateY(0);
}

/* screen-reader text — stays in the accessibility tree */
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* --- Background layers ------------------------------------------------- */
#trace {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#grain {
  position: fixed;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  opacity: 0.05;
  pointer-events: none;
  image-rendering: pixelated;
}

#flash {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: var(--accent);
  opacity: 0;
  pointer-events: none;
}

#flash.is-on {
  animation: flash 720ms var(--ease-out) 1;
}

@keyframes flash {
  0% {
    opacity: 0;
  }
  7% {
    opacity: 0.2;
  }
  100% {
    opacity: 0;
  }
}

/* --- Chrome (top) ------------------------------------------------------ */
.chrome {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--chrome-h);
  padding: 0 var(--gutter);
  background: rgba(8, 9, 11, 0.82);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hair);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.station {
  color: var(--faint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chrome-tools {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-3), 2.4vw, var(--space-6));
  flex: none;
}

.chip {
  color: var(--dim);
  white-space: nowrap;
}

.audio-btn,
.clock,
.back-link {
  color: var(--dim);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.audio-btn {
  padding: 0;
  transition: color var(--dur-fast) var(--ease-out);
}

.audio-btn:hover,
.back-link:hover {
  color: var(--ink);
}

.audio-btn[aria-pressed="true"] {
  color: var(--accent);
}

.clock {
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 860px) {
  .station {
    display: none;
  }

  .chrome {
    justify-content: flex-end;
  }

  .chrome-tools {
    flex: 1;
    justify-content: space-between;
  }
}

@media (max-width: 520px) {
  .clock {
    display: none;
  }
}

/* --- Type layers (noise → resolve) ------------------------------------- */
.noise .w {
  display: inline-block;
  white-space: nowrap;
}

.noise .g {
  display: inline-block;
  transform: translate(
      calc(var(--dx, 0) * var(--amp) * var(--n, 0)),
      calc(var(--dy, 0) * var(--amp) * var(--n, 0))
    )
    rotate(calc(var(--dr, 0) * var(--n, 0) * 1deg));
  opacity: calc(1 - var(--drop, 0) * var(--n, 0) * var(--dropamp, 1));
}

.noise {
  --amp: 9px;
}

/* the receiver's own labels are signal too — they shimmer, but stay legible */
.entry-no > .noise,
.entry-title > .noise {
  --amp: 2.5px;
  --dropamp: 0.55;
}

/* --- Sections ---------------------------------------------------------- */
.hero,
.log,
.outro {
  overflow: clip;
}

/* --- Hero -------------------------------------------------------------- */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: calc(100svh - var(--chrome-h));
  /* the fixed dial must never sit over the foot of the cold open */
  padding: var(--space-7) var(--gutter) calc(var(--dial-h) + var(--space-6));
}

.hero-meta {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--hair-soft);
}

.hero-title {
  font-size: var(--fs-mega);
  font-weight: 400;
  line-height: 1;
}

.hero-foot {
  display: grid;
  gap: var(--space-3);
  max-width: 46rem;
}

.note {
  color: var(--dim);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.note--wide {
  max-width: 46ch;
  letter-spacing: 0.06em;
  line-height: 1.7;
}

.note--hot {
  color: var(--ink);
  text-align: right;
}

.cell {
  display: flex;
  gap: var(--space-4);
  color: var(--faint);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.cell b {
  color: var(--dim);
  font-weight: 400;
}

/* --- Cropped display type ---------------------------------------------- */
.crop {
  display: block;
  height: 0.74em;
  margin-inline: calc(-1 * var(--gutter));
  padding-inline: var(--gutter);
  overflow: hidden;
  white-space: nowrap;
  font-size: var(--fs-mega);
  line-height: 1;
}

.crop--right {
  text-align: right;
}

.crop--right .mega {
  margin-right: calc(-1 * var(--bleed));
}

.crop--left .mega {
  margin-left: calc(-1 * var(--bleed));
}

.mega {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1em;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

.crop .noise {
  --amp: 0.055em;
  --dropamp: 0.7;
}

.mega-row {
  margin-bottom: var(--space-6);
}

/* entries sit one notch below the hero scale so a resolved passage always
   clears the fixed dial at its resolve peak */
.entry .crop {
  font-size: clamp(3.4rem, 17vw, 15rem);
}

/* --- Log entries ------------------------------------------------------- */
.entry {
  display: grid;
  gap: var(--space-5);
  padding: var(--space-8) var(--gutter);
  border-top: 1px solid var(--hair-soft);
}

.entry-no {
  color: var(--faint);
  font-size: var(--fs-note);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.entry-title {
  font-size: var(--fs-title);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  transition: color var(--dur-fast) linear;
}

.telemetry {
  display: grid;
  gap: var(--space-2);
  align-content: start;
}

.telemetry > div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--hair-soft);
  font-size: var(--fs-note);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.telemetry dt {
  color: var(--faint);
  white-space: nowrap;
}

.telemetry dd {
  color: var(--dim);
  text-align: right;
}

.passage {
  max-width: 62ch;
  color: var(--ink);
}

@media (min-width: 900px) {
  .entry {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    grid-template-areas:
      "no    no   no   .     .     .     .     .     .     .     .     ."
      "mega  mega mega mega  mega  mega  mega  mega  mega  mega  mega  mega"
      ".     .    .    title title title title title title title title ."
      "tel   tel  tel  body  body  body  body  body  body  body  body  .";
    row-gap: var(--space-6);
    /* asymmetric on purpose: 9vh + 23vh keeps the old 16vh + 16vh total, so
       the document height (and the dial mapping) is unchanged, but the entry
       sits high enough that a resolved passage clears the fixed dial */
    padding-block: clamp(4rem, 9vh, 6rem) clamp(8rem, 23vh, 16rem);
  }

  .entry-no {
    grid-area: no;
  }

  .mega-row {
    grid-area: mega;
  }

  .entry-title {
    grid-area: title;
  }

  .telemetry {
    grid-area: tel;
  }

  .passage {
    grid-area: body;
  }
}

/* --- Outro ------------------------------------------------------------- */
.outro {
  display: grid;
  gap: var(--space-8);
  min-height: calc(92svh - var(--dial-h));
  padding: var(--space-8) var(--gutter) var(--space-8);
  border-top: 1px solid var(--hair-soft);
  align-content: center;
}

.statement {
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: var(--fs-statement);
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.statement .noise {
  --amp: 0.026em;
  --dropamp: 0.55;
}

.ledger {
  display: grid;
  gap: var(--space-2);
  max-width: 34rem;
}

.ledger > div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--hair-soft);
  font-size: var(--fs-note);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

.ledger dd {
  color: var(--dim);
  text-align: right;
}

.outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.text-link {
  color: var(--dim);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0;
  transition: color var(--dur-fast) var(--ease-out);
}

.text-link:hover {
  color: var(--accent);
}

/* --- Footer ------------------------------------------------------------ */
.foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-5) var(--gutter) var(--space-6);
  border-top: 1px solid var(--hair-soft);
  color: var(--faint);
  font-size: var(--fs-note);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.foot a:hover {
  color: var(--ink);
}

/* --- Frequency dial (bottom) ------------------------------------------- */
.dial {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  padding: var(--space-3) var(--gutter) calc(var(--space-5) + env(safe-area-inset-bottom, 0px));
  background: rgba(8, 9, 11, 0.86);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--hair);
}

.dial-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  font-size: var(--fs-note);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.dial-band {
  color: var(--faint);
}

.dial-mode {
  color: var(--dim);
  transition: color var(--dur-fast) linear;
}

.dial-read {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur-fast) linear;
}

.dial-rail {
  position: relative;
  height: 16px;
  margin-inline: 0;
}

/* 80 fine divisions, 8 majors — pure CSS, so the dial reads without JS */
.dial-rail::before,
.dial-rail::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
}

.dial-rail::before {
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--hair) 0 1px, transparent 1px 1.25%);
}

.dial-rail::after {
  height: 11px;
  background: repeating-linear-gradient(90deg, var(--faint) 0 1px, transparent 1px 12.5%);
}

.dial-marks i {
  position: absolute;
  bottom: 0;
  width: 1px;
  height: 16px;
  background: var(--ghost);
}

.dial-marks b {
  position: absolute;
  top: 100%;
  transform: translateX(-50%);
  padding-top: 2px;
  color: var(--faint);
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.dial-marks em {
  font-style: normal;
  color: var(--ghost);
}

@media (max-width: 700px) {
  .dial-marks em {
    display: none;
  }
}

@media (max-width: 560px) {
  .dial-band {
    display: none;
  }
}

.dial-needle {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 1px;
  height: 16px;
  background: var(--ink);
  will-change: transform;
}

.dial.is-lock .dial-needle,
.dial.is-lock .dial-read,
.dial.is-lock .dial-mode {
  background: none;
  color: var(--accent);
}

.dial.is-lock .dial-needle {
  background: var(--accent);
}

/* --- The lock / slam --------------------------------------------------- */
.entry.is-slam .mega {
  animation: slam 460ms var(--ease-out) 1;
}

/* the accent holds for exactly as long as the carrier is locked */
.entry.is-lock .entry-title {
  color: var(--accent);
}

@keyframes slam {
  0% {
    transform: scale(1.12);
  }
  100% {
    transform: scale(1);
  }
}

/* --- Reduced motion: complete, static, readable ------------------------ */
@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;
  }

  .noise .g {
    transform: none !important;
    opacity: 1 !important;
  }

  #grain {
    opacity: 0.04;
  }
}