/* LUMIVALE — Inkline Exchange (contact)
   Ruled letter · postmark column · stamp seals · gradient-mask envelope
   Container queries · fluid type — NOT Night Desk constellation / floating glass */

@import url('https://fonts.googleapis.com/css2?family=Spectral:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Work+Sans:wght@400;500;600;700;800&display=swap');

.page-inkline {
  --ix-void: #12081a;
  --ix-panel: #1c1026;
  --ix-panel-2: #241533;
  --ix-line: rgba(232, 214, 255, 0.14);
  --ix-ink: #f3eaff;
  --ix-mute: #d0c0e0;
  --ix-cyan: #00e5c8;
  --ix-orchid: #d946ef;
  --ix-paper: #f7f0ff;
  --ix-font: 'Work Sans', system-ui, sans-serif;
  --ix-display: 'Spectral', Georgia, serif;
  --ix-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ix-fluid: clamp(0.94rem, 0.35vw + 0.88rem, 1.08rem);
  background:
    radial-gradient(90% 60% at 0% 0%, rgba(217, 70, 239, 0.16), transparent 50%),
    radial-gradient(80% 50% at 100% 20%, rgba(0, 229, 200, 0.1), transparent 45%),
    linear-gradient(180deg, #180b22 0%, var(--ix-void) 50%, #0a0510 100%) !important;
  color: var(--ix-ink);
  font-family: var(--ix-font);
  font-size: var(--ix-fluid);
}

.page-inkline .page-main {
  overflow-x: clip;
  padding-bottom: 3rem;
}

.ix {
  position: relative;
  max-width: 1040px;
  margin: 0 auto;
  padding: 1.4rem var(--space-container, 1.25rem) 2.5rem;
}

/* —— Mast —— */
.ix-mast {
  margin-bottom: 1.6rem;
  max-width: 36rem;
}

.ix-brand {
  margin: 0 0 0.3rem;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ix-cyan);
}

.ix-mast h1 {
  margin: 0 0 0.45rem;
  font-family: var(--ix-display);
  font-weight: 700;
  font-size: clamp(2.8rem, 10vw, 4.8rem);
  letter-spacing: -0.03em;
  line-height: 0.92;
}

.ix-mast h1 em {
  font-style: italic;
  color: var(--ix-orchid);
  font-weight: 600;
}

.ix-lede {
  margin: 0;
  color: var(--ix-mute);
  font-size: clamp(0.95rem, 2.2vw, 1.12rem);
  line-height: 1.45;
}

/* —— Sheet grid —— */
.ix-sheet {
  display: grid;
  grid-template-columns: minmax(15rem, 0.85fr) minmax(0, 1.35fr);
  gap: 1rem 1.25rem;
  align-items: start;
}

@media (max-width: 860px) {
  .ix-sheet {
    grid-template-columns: 1fr;
  }
}

/* —— Postmark column (gradient-mask border) —— */
.ix-postmark {
  position: relative;
  border-radius: 18px;
  isolation: isolate;
}

.ix-postmark::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(
    160deg,
    rgba(0, 229, 200, 0.75),
    rgba(232, 214, 255, 0.08) 40%,
    rgba(217, 70, 239, 0.65)
  );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 2;
}

.ix-postmark-inner {
  position: relative;
  padding: 1.25rem 1.15rem 1.3rem;
  border-radius: 18px;
  background:
    repeating-linear-gradient(
      180deg,
      transparent,
      transparent 27px,
      rgba(232, 214, 255, 0.04) 27px,
      rgba(232, 214, 255, 0.04) 28px
    ),
    var(--ix-panel);
}

.ix-post-kicker {
  margin: 0 0 0.2rem;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ix-cyan);
}

.ix-postmark-inner h2 {
  margin: 0 0 1rem;
  font-family: var(--ix-display);
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 700;
}

.ix-channels {
  margin: 0 0 1.25rem;
  display: grid;
  gap: 0.85rem;
}

.ix-channels dt {
  margin: 0;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ix-mute);
}

.ix-channels dd {
  margin: 0.2rem 0 0;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.4;
  word-break: break-word;
}

.ix-channels a {
  color: var(--ix-paper) !important;
  text-decoration: underline !important;
  text-underline-offset: 0.18em;
  text-decoration-color: color-mix(in srgb, var(--ix-cyan) 50%, transparent);
}

.ix-channels a:hover {
  color: var(--ix-cyan) !important;
}

/* Stamp seals */
.ix-stamps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.ix-stamp {
  display: grid;
  gap: 0.15rem;
  padding: 0.7rem 0.65rem;
  text-decoration: none !important;
  color: var(--ix-ink) !important;
  background: rgba(0, 0, 0, 0.28);
  border: 1px dashed color-mix(in srgb, var(--ix-orchid) 40%, transparent);
  border-radius: 4px;
  transform: rotate(calc((var(--s, 0) - 1.5) * 1.2deg));
  transition: transform 0.2s var(--ix-ease), border-color 0.2s ease, background 0.2s ease;
  animation: ix-rise 0.45s var(--ix-ease) both;
  animation-delay: calc(var(--s, 0) * 45ms);
}

@keyframes ix-rise {
  from {
    opacity: 0;
    transform: translateY(8px) rotate(calc((var(--s, 0) - 1.5) * 1.2deg));
  }
}

.ix-stamp span {
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--ix-mute);
}

.ix-stamp strong {
  font-family: var(--ix-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.ix-stamp:hover {
  border-color: var(--ix-cyan);
  background: color-mix(in srgb, var(--ix-cyan) 10%, rgba(0, 0, 0, 0.35));
  transform: rotate(0deg) translateY(-2px);
  color: var(--ix-ink) !important;
}

/* —— Envelope form —— */
.ix-envelope {
  position: relative;
  container-type: inline-size;
  container-name: envelope;
}

.ix-flap {
  height: 1.35rem;
  margin: 0 1.5rem;
  background: linear-gradient(90deg, var(--ix-orchid), var(--ix-cyan));
  opacity: 0.55;
  clip-path: polygon(0 100%, 50% 0, 100% 100%);
}

.ix-letter {
  position: relative;
  margin-top: -1px;
  padding: 1.35rem 1.25rem 1.4rem;
  border-radius: 0 0 20px 20px;
  background:
    repeating-linear-gradient(
      180deg,
      transparent 0,
      transparent 31px,
      rgba(0, 229, 200, 0.06) 31px,
      rgba(0, 229, 200, 0.06) 32px
    ),
    linear-gradient(180deg, var(--ix-panel-2), var(--ix-panel));
  transition: transform 0.35s var(--ix-ease), box-shadow 0.35s ease;
}

.ix-letter::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(
    200deg,
    rgba(217, 70, 239, 0.7),
    transparent 35%,
    rgba(0, 229, 200, 0.55)
  );
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.ix-letter.is-lift {
  transform: translateY(-4px);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.35);
}

.ix-letter-kicker {
  margin: 0 0 0.2rem;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ix-orchid);
}

.ix-letter-head h2 {
  margin: 0 0 0.35rem;
  font-family: var(--ix-display);
  font-size: clamp(1.45rem, 3.5vw, 2rem);
  font-weight: 700;
}

.ix-letter-head p {
  margin: 0 0 1.1rem;
  color: var(--ix-mute);
  font-size: 0.92rem;
}

.ix-toast {
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.92rem;
}

.ix-toast--ok {
  background: color-mix(in srgb, var(--ix-cyan) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--ix-cyan) 40%, transparent);
  color: #9ff5e8;
}

.ix-toast--err {
  background: color-mix(in srgb, var(--ix-orchid) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--ix-orchid) 45%, transparent);
  color: #f5c0ff;
}

/* Fields — container queries */
.ix-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.95rem 1rem;
  margin-bottom: 1.1rem;
}

.ix-field--span {
  grid-column: 1 / -1;
}

@container envelope (max-width: 520px) {
  .ix-fields {
    grid-template-columns: 1fr;
  }
}

.ix-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.ix-field-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ix-mute);
}

.ix-field-label em {
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: none;
  opacity: 0.75;
}

.ix-field input,
.ix-field textarea {
  width: 100%;
  box-sizing: border-box;
  margin: 0;
  padding: 0.55rem 0.15rem 0.65rem;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--ix-paper);
  font: inherit;
  font-size: 1.02rem;
  outline: none;
  border-bottom: 2px solid var(--ix-line);
  transition: border-color 0.2s ease, background 0.2s ease;
  resize: vertical;
}

.ix-field textarea {
  padding-top: 0.45rem;
  line-height: 1.55;
  /* Align to ruled background */
  background-image: repeating-linear-gradient(
    180deg,
    transparent 0,
    transparent 30px,
    rgba(0, 229, 200, 0.08) 30px,
    rgba(0, 229, 200, 0.08) 31px
  );
  background-attachment: local;
}

.ix-field input:focus,
.ix-field textarea:focus {
  border-bottom-color: var(--ix-cyan);
  background: color-mix(in srgb, var(--ix-cyan) 4%, transparent);
}

.ix-field.is-valid input,
.ix-field.is-valid textarea {
  border-bottom-color: var(--ix-cyan);
}

.ix-field.is-invalid input,
.ix-field.is-invalid textarea {
  border-bottom-color: var(--ix-orchid);
}

.ix-field.is-focus .ix-field-label {
  color: var(--ix-cyan);
}

.ix-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  justify-content: space-between;
}

.ix-hint {
  margin: 0;
  flex: 1 1 12rem;
  font-size: 0.85rem;
  color: var(--ix-mute);
}

.ix-hint.is-ready {
  color: var(--ix-cyan);
}

.ix-send {
  appearance: none;
  border: none;
  cursor: pointer;
  padding: 0.8rem 1.35rem;
  font-family: var(--ix-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: #0a1210;
  background: var(--ix-cyan);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  transition: transform 0.2s var(--ix-ease), background 0.2s ease, opacity 0.2s ease;
}

.ix-send:hover:not(:disabled) {
  background: #5ff0db;
  transform: translateY(-1px);
}

.ix-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

@media (prefers-reduced-motion: reduce) {
  .ix-stamp,
  .ix-letter,
  .ix-send {
    animation: none !important;
    transition: none !important;
  }
}