/* =========================================================
   Function Psi — contact: transmission console
   ========================================================= */

body.contact {
  background:
    radial-gradient(circle at 82% 2%, rgba(112, 231, 255, 0.07), transparent 32rem),
    radial-gradient(circle at 8% 52%, rgba(155, 123, 255, 0.045), transparent 26rem),
    var(--bg);
}

/* ---------- hero ---------- */

.contact-hero {
  position: relative;
  display: flex;
  min-height: 82svh;
  align-items: flex-end;
  padding-top: calc(var(--header-h) + 5rem);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.contact-hero__signal {
  position: absolute;
  top: 50%;
  right: -12vw;
  width: min(58vw, 46rem);
  aspect-ratio: 1;
  transform: translateY(-50%);
  pointer-events: none;
}

.contact-hero__signal span {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(112, 231, 255, 0.18);
  border-radius: 50%;
  animation: contact-ring 7s var(--ease-out) infinite;
}

.contact-hero__signal span:nth-child(2) {
  inset: 15%;
  border-color: rgba(201, 255, 74, 0.18);
  animation-delay: -2.4s;
}

.contact-hero__signal span:nth-child(3) {
  inset: 31%;
  border-color: rgba(243, 241, 234, 0.12);
  animation-delay: -4.8s;
}

.contact-hero__signal::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 40px 8px rgba(112, 231, 255, 0.45);
  transform: translate(-50%, -50%);
}

@keyframes contact-ring {
  0% {
    opacity: 0.25;
    transform: scale(0.92);
  }
  45% {
    opacity: 0.75;
  }
  100% {
    opacity: 0.2;
    transform: scale(1.05);
  }
}

.contact-hero__inner {
  position: relative;
  z-index: 1;
}

.contact-hero__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.contact-hero__status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
}

.contact-hero__status i {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 14px rgba(201, 255, 74, 0.75);
}

.contact-hero h1 {
  max-width: 10ch;
  margin-top: clamp(1.4rem, 3vw, 2.4rem);
  font-size: clamp(4.8rem, 16vw, 17rem);
  line-height: 0.74;
  letter-spacing: -0.09em;
}

.contact-hero h1 em {
  color: var(--cyan);
  font-family: var(--serif);
  font-weight: 400;
}

.contact-hero__foot {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  align-items: end;
  gap: clamp(2rem, 7vw, 8rem);
  margin-top: clamp(2.2rem, 4.5vw, 4rem);
  padding-top: clamp(1.4rem, 3vw, 2.2rem);
  border-top: 1px solid var(--line);
}

.contact-hero__lede {
  max-width: 37rem;
  color: var(--ink-dim);
  font-size: clamp(0.98rem, 1.25vw, 1.15rem);
  line-height: 1.62;
}

.contact-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.6rem;
  margin: 0;
}

.contact-hero__meta div {
  display: grid;
  gap: 0.25rem;
}

.contact-hero__meta dt {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.52rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-hero__meta dd {
  margin: 0;
  color: var(--ink-dim);
  font-size: 0.85rem;
}

/* ---------- console ---------- */

.console {
  padding-block: clamp(4rem, 8vw, 7rem);
  border-bottom: 1px solid var(--line);
}

.console__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: clamp(2rem, 6vw, 6rem);
  margin-bottom: clamp(2rem, 4vw, 3.2rem);
}

.console__head h2 {
  max-width: 13ch;
  margin-top: 1rem;
  font-size: clamp(2.7rem, 6vw, 6rem);
}

.console__head h2 em {
  color: var(--cyan);
  font-family: var(--serif);
  font-weight: 400;
}

.console__head > p {
  max-width: 26rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.console__shell {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.28);
}

.console__form {
  display: grid;
  gap: 1.35rem;
  padding: clamp(1.2rem, 3vw, 2.2rem);
  border-right: 1px solid var(--line);
}

.console__field {
  display: grid;
  gap: 0.5rem;
}

.console__field label,
.console__field legend {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.console__field label span,
.console__field legend span {
  color: var(--quiet);
  font-size: 0.52rem;
  letter-spacing: 0.03em;
  text-transform: none;
}

.console__field input[type="text"],
.console__field textarea,
.console__field select {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  outline: 0;
  background: var(--bg-raised);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.92rem;
  line-height: 1.5;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.console__field textarea {
  min-height: 8rem;
  resize: vertical;
}

.console__field input[type="text"]::placeholder,
.console__field textarea::placeholder {
  color: var(--quiet);
}

.console__field input[type="text"]:focus,
.console__field textarea:focus,
.console__field select:focus {
  border-color: var(--cyan);
  background: var(--panel-soft);
}

.console__field select {
  appearance: none;
  padding-right: 2rem;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 1rem) 50%, calc(100% - 0.65rem) 50%;
  background-size: 0.35rem 0.35rem, 0.35rem 0.35rem;
  background-repeat: no-repeat;
}

.console__field--choice {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.console__field--choice legend {
  width: 100%;
  margin-bottom: 0.5rem;
  padding: 0;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  position: relative;
  display: inline-flex;
  cursor: pointer;
}

.chip input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.chip span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
  transition: border-color 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.chip:hover span {
  border-color: var(--line-strong);
  color: var(--ink);
}

.chip input:checked + span {
  border-color: var(--cyan);
  background: var(--cyan);
  color: #08090a;
}

.chip input:focus-visible + span {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.console__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.console__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  padding-top: 0.2rem;
}

.console__actions .btn[disabled] {
  cursor: not-allowed;
  opacity: 0.42;
}

.console__actions .btn[disabled]::before {
  transform: translateY(101%);
}

.console__reset {
  padding: 0.5rem 0.2rem;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: color 0.25s ease;
}

.console__reset:hover,
.console__reset:focus-visible {
  color: var(--ember);
}

.console__hint {
  min-height: 1.2rem;
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.03em;
  line-height: 1.5;
}

.console__preview {
  display: flex;
  min-height: 34rem;
  flex-direction: column;
  background:
    linear-gradient(180deg, rgba(112, 231, 255, 0.035), transparent 40%),
    var(--bg-deep);
}

.console__preview-head,
.console__preview-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 2vw, 1.4rem);
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.54rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.console__preview-head {
  border-bottom: 1px solid var(--line);
}

.console__preview-foot {
  border-top: 1px solid var(--line);
}

.console__preview-foot button {
  padding: 0;
  color: var(--cyan);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  transition: color 0.25s ease;
}

.console__preview-foot button:hover,
.console__preview-foot button:focus-visible {
  color: var(--lime);
}

.console__preview-foot button:disabled {
  cursor: not-allowed;
  color: var(--quiet);
  opacity: 0.5;
}

.console__output {
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: clamp(1rem, 2.4vw, 1.6rem);
  overflow: auto;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- channels ---------- */

.channels {
  padding-block: clamp(4rem, 8vw, 7rem);
  border-bottom: 1px solid var(--line);
}

.channels__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: clamp(2rem, 4vw, 3.2rem);
}

.channels__head h2 {
  max-width: 13ch;
  margin-top: 1rem;
  font-size: clamp(2.7rem, 6vw, 5.8rem);
}

.channels__head h2 em {
  color: var(--cyan);
  font-family: var(--serif);
  font-weight: 400;
}

.channels__head > p {
  max-width: 24rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.channels__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.channel {
  display: flex;
  min-height: 15rem;
  flex-direction: column;
  gap: 0.8rem;
  padding: 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  transition:
    border-color 0.3s var(--ease-out),
    background-color 0.3s var(--ease-out),
    transform 0.3s var(--ease-out);
}

.channel:hover,
.channel:focus-visible {
  border-color: var(--line-strong);
  background: var(--panel-soft);
  transform: translateY(-3px);
}

.channel--primary {
  grid-column: span 2;
  border-color: rgba(112, 231, 255, 0.35);
  background:
    radial-gradient(circle at 90% 0%, rgba(112, 231, 255, 0.12), transparent 18rem),
    var(--panel);
}

.channel--primary:hover,
.channel--primary:focus-visible {
  border-color: var(--cyan);
}

.channel__tag {
  color: var(--quiet);
  font-family: var(--mono);
  font-size: 0.52rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.channel--primary .channel__tag {
  color: var(--cyan);
}

.channel__name {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
  color: var(--ink);
  font-size: clamp(1.35rem, 2vw, 1.9rem);
  letter-spacing: -0.035em;
  line-height: 1;
}

.channel__name span {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 0.55em;
  letter-spacing: 0;
}

.channel__copy {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ---------- protocol ---------- */

.protocol {
  padding-block: clamp(4.5rem, 9vw, 8rem);
}

.protocol__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 7vw, 8rem);
}

.protocol__head h2 {
  max-width: 12ch;
  margin-top: 1rem;
  font-size: clamp(2.8rem, 6vw, 5.8rem);
}

.protocol__head h2 em {
  color: var(--cyan);
  font-family: var(--serif);
  font-weight: 400;
}

.protocol__head p {
  max-width: 28rem;
  margin-top: 1.3rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.protocol__steps {
  display: grid;
  border-top: 1px solid var(--line);
}

.protocol__steps li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}

.protocol__steps li > span {
  padding-top: 0.25rem;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.05em;
}

.protocol__steps h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
}

.protocol__steps p {
  max-width: 34rem;
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 1000px) {
  .console__shell {
    grid-template-columns: 1fr;
  }

  .console__form {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .console__preview {
    min-height: 26rem;
  }

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

  .channel--primary {
    grid-column: span 2;
  }
}

@media (max-width: 800px) {
  .contact-hero {
    min-height: 72svh;
  }

  .contact-hero__foot {
    grid-template-columns: 1fr;
    gap: 1.8rem;
  }

  .contact-hero__meta {
    max-width: 32rem;
  }

  .console__head,
  .channels__head {
    align-items: flex-start;
    flex-direction: column;
    gap: 1.2rem;
  }

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

@media (max-width: 600px) {
  .contact-hero h1 {
    font-size: clamp(4rem, 20vw, 7rem);
  }

  .contact-hero__top {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .contact-hero__signal {
    right: -40vw;
    width: 110vw;
    opacity: 0.65;
  }

  .contact-hero__meta {
    grid-template-columns: 1fr;
  }

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

  .console__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .console__actions .btn {
    width: 100%;
  }

  .console__reset {
    align-self: flex-start;
  }

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

  .channel--primary {
    grid-column: auto;
  }

  .channel {
    min-height: 12rem;
  }

  .console__preview-foot {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .contact-hero__signal span {
    animation: none;
  }

  .channel {
    transition: none;
  }

  .channel:hover {
    transform: none;
  }
}