:root {
  color-scheme: dark;
  font-family: system-ui, sans-serif;
  background: #0a1816;
  color: #f8fafc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-block-size: 100dvh;
  display: grid;
  place-items: start center;
  padding: 2rem 1rem;
}

main {
  width: min(76rem, 100%);
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border: 1px solid #344054;
  border-radius: 1rem;
  background: #132522;
  box-shadow: 0 1rem 3rem #0008;
}

button {
  border: 1px solid #98a2b3;
  border-radius: .55rem;
  padding: .65rem .9rem;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

button:focus-visible {
  outline: .2rem solid currentColor;
  outline-offset: .2rem;
}

button:disabled { cursor: progress; opacity: .65; }

#update-notice {
  margin-block: 1rem;
  padding: 1rem;
  border: 1px solid #98a2b3;
  border-radius: .75rem;
}

.diagnostics-shell {
  margin-top: 2rem;
  border-top: 1px solid #475467;
  padding-top: 1.25rem;
}

.diagnostic-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: .75rem;
}

[data-diagnostic-status] {
  min-height: 1.5rem;
  margin-bottom: 1rem;
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: 1rem;
}

.diagnostic-card {
  min-width: 0;
  border: 1px solid #475467;
  border-radius: .75rem;
  padding: 1rem;
  background: #101828;
}

.diagnostic-card h2 {
  margin: 0 0 .75rem;
  font-size: 1.05rem;
}

.diagnostic-card dl { margin: 0; }

.diagnostic-row {
  display: grid;
  grid-template-columns: minmax(8rem, .8fr) minmax(0, 1.2fr);
  gap: .75rem;
  padding-block: .4rem;
  border-top: 1px solid #344054;
}

.diagnostic-row:first-child { border-top: 0; }
.diagnostic-row dt { font-weight: 700; }
.diagnostic-row dd { margin: 0; overflow-wrap: anywhere; }

[data-diagnostic-export] {
  max-height: 28rem;
  overflow: auto;
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid #475467;
  border-radius: .75rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: #101828;
}

@media (max-width: 42rem) {
  body { padding: 0; }
  main { border-radius: 0; border-inline: 0; }
  .diagnostic-row { grid-template-columns: 1fr; gap: .2rem; }
}

html[data-runtime-mode="installed-app"],
html[data-runtime-mode="installed-app"] body {
  block-size: 100%;
  min-block-size: 100%;
}

html[data-runtime-mode="installed-app"] body {
  display: block;
  padding: 0;
  overflow: hidden;
}

[data-mainchat-runtime="installed"] {
  inline-size: 100%;
  background: #0a1816;
  color: #f8fafc;
}

[data-mainchat-runtime="installed"] .mainchat-viewport-scrollport {
  display: grid;
  align-content: start;
}

[data-mainchat-runtime="installed"] main {
  margin-inline: auto;
}

.mainchat-conversation-surface {
  min-block-size: 100%;
  display: flex;
  flex-direction: column;
  gap: .8rem;
  padding: 1rem clamp(.75rem, 4vw, 2rem);
}

.mainchat-viewport-bottom-zone {
  border-block-start: 1px solid #344054;
  background: #0a1816;
}

.mainchat-composer {
  display: block;
  inline-size: 100%;
  min-block-size: 3.25rem;
  margin: 0;
  padding: .85rem 1rem;
  resize: none;
  border: 0;
  border-radius: 0;
  background: #132522;
  color: inherit;
  font: inherit;
}

.mainchat-composer:focus-visible {
  outline: .2rem solid currentColor;
  outline-offset: -.2rem;
}

.mainchat-composer-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  align-items: end;
  gap: .4rem;
  padding: .4rem;
  background: #0a1816;
}

.mainchat-composer-form .mainchat-composer {
  border: 1px solid #344054;
  border-radius: .75rem;
}

.mainchat-resonance-control,
.mainchat-send-control,
.mainchat-export-control,
.mainchat-new-thread-control {
  min-block-size: 3.25rem;
  background: #132522;
  color: inherit;
}

.mainchat-message {
  max-inline-size: min(48rem, 92%);
  padding: .8rem 1rem;
  border: 1px solid #344054;
  border-radius: 1rem;
  background: #132522;
  overflow-wrap: anywhere;
}

.mainchat-message-custode { align-self: flex-end; background: #26364c; }
.mainchat-message-andrew { align-self: flex-start; border-color: #167a64; }
.mainchat-message-provisional { opacity: .72; border-style: dashed; }
.mainchat-message-author { display: block; margin-block-end: .45rem; color: #6ee7c3; }
.mainchat-message-custode .mainchat-message-author { color: #d0d5dd; }
.mainchat-message-body > :first-child { margin-block-start: 0; }
.mainchat-message-body > :last-child { margin-block-end: 0; }
.mainchat-message-body pre { overflow-x: auto; padding: .75rem; border-radius: .5rem; background: #0b1220; }
.mainchat-message-body table { border-collapse: collapse; }
.mainchat-message-body th,
.mainchat-message-body td { padding: .45rem .65rem; border: 1px solid #475467; text-align: start; }
.mainchat-message-actions { display: flex; gap: .35rem; margin-block-start: .65rem; }
.mainchat-message-actions button { padding: .25rem .5rem; background: transparent; color: inherit; font-size: .8rem; }
.mainchat-generation-error { color: #fda29b; }
.mainchat-inline-editor { inline-size: 100%; min-block-size: 7rem; padding: .65rem; font: inherit; }

.mainchat-new-thread-dialog {
  max-inline-size: min(30rem, calc(100% - 2rem));
  padding: 1.2rem;
  border: 1px solid #475467;
  border-radius: 1rem;
  background: #0a1816;
  color: #f8fafc;
}

.mainchat-new-thread-dialog::backdrop { background: #000a; }
.mainchat-new-thread-dialog button { margin: .3rem; background: #132522; color: inherit; }

.mainchat-unseen-control {
  position: sticky;
  inset-block-end: 1rem;
  margin-inline: auto;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  padding: 0;
  border-color: #20c997;
  border-radius: 50%;
  background: #073b32;
  color: #34d399;
  font-size: 2rem;
  line-height: 1;
}

.mainchat-unseen-control[hidden] { display: none; }

/* REC-F14B-12 — MAIN Aurora e Impostazioni sono superfici mutuamente esclusive. */
html[data-runtime-mode="installed-app"] [data-mainchat-runtime="installed"] {
  grid-template-rows: auto auto minmax(0, 1fr) auto;
}

[data-runtime-screen="main-aurora"][hidden],
.mainchat-settings-screen[hidden] {
  display: none;
}

.mainchat-topbar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  min-block-size: 3rem;
  padding: .5rem .75rem;
  border-block-end: 1px solid #344054;
  background: #0a1816;
}

.mainchat-topbar-left,
.mainchat-topbar-right {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.mainchat-topbar-right {
  min-inline-size: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.mainchat-topbar-right::-webkit-scrollbar { display: none; }

.mainchat-status-led {
  inline-size: 2.25rem;
  block-size: 2.25rem;
  padding: 0;
  border: 0;
  background: transparent;
  font-size: 1.1rem;
}

.mainchat-status-led[data-status="green"] { color: #34d399; }
.mainchat-status-led[data-status="yellow"] { color: #fbbf24; }
.mainchat-status-led[data-status="red"] { color: #fb7185; }

.mainchat-sync-status {
  position: absolute;
  inset-block-start: calc(100% + .35rem);
  inset-inline-start: .75rem;
  z-index: 2;
  max-inline-size: min(28rem, calc(100vw - 1.5rem));
  margin: 0;
  padding: .65rem .8rem;
  border: 1px solid #475467;
  border-radius: .65rem;
  background: #132522;
  box-shadow: 0 .6rem 1.5rem #0008;
}

.mainchat-operational-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem;
  padding: .65rem .8rem;
  border-block-end: 1px solid #a15c12;
  background: #3b2a0d;
  color: #fff7d6;
}

.mainchat-operational-banner[hidden] { display: none; }
.mainchat-operational-banner[data-level="red"] { border-color: #f04438; background: #411817; color: #fff1f0; }
.mainchat-operational-banner p { flex: 1 1 20rem; margin: 0; }
.mainchat-operational-banner button { padding: .4rem .6rem; background: #132522; color: inherit; }

.mainchat-action-status {
  position: fixed;
  inset-block-start: calc(env(safe-area-inset-top, 0px) + 3.5rem);
  inset-inline: .75rem;
  z-index: 3;
  max-inline-size: 32rem;
  margin: 0 auto;
  padding: .65rem .8rem;
  border: 1px solid #f04438;
  border-radius: .65rem;
  background: #411817;
  color: #fff1f0;
  box-shadow: 0 .6rem 1.5rem #0008;
}

.mainchat-action-status:empty { display: none; }

.mainchat-brand-label,
.mainchat-settings-title {
  font-weight: 700;
}

.mainchat-settings-control,
.mainchat-settings-back {
  min-block-size: 2.25rem;
  padding: .35rem .65rem;
  background: transparent;
  color: inherit;
}

.mainchat-settings-screen {
  inline-size: 100%;
  block-size: 100dvh;
  min-block-size: 100dvh;
  padding-block-start: env(safe-area-inset-top, 0px);
  padding-inline-end: env(safe-area-inset-right, 0px);
  padding-inline-start: env(safe-area-inset-left, 0px);
  background: #0a1816;
  color: #f8fafc;
  overflow: hidden;
}

.mainchat-settings-content {
  block-size: calc(100% - 3rem);
  min-block-size: 0;
  overflow-y: auto;
}

.mainchat-enrollment-form {
  display: grid;
  gap: .75rem;
  max-inline-size: 32rem;
  margin: 1rem auto;
  padding: 1rem;
  border: 1px solid #475467;
  border-radius: .75rem;
}

.mainchat-enrollment-form[hidden] { display: none; }

.mainchat-enrollment-form input,
.mainchat-enrollment-form textarea {
  inline-size: 100%;
  min-block-size: 3rem;
  padding: .75rem;
  border: 1px solid #667085;
  border-radius: .55rem;
  background: #0b1220;
  color: inherit;
  font: inherit;
}

.mainchat-enrollment-form textarea {
  min-block-size: 9rem;
  resize: vertical;
}

.constitution-settings {
  display: grid;
  gap: 1rem;
  max-inline-size: 48rem;
  margin: 1rem auto;
  padding: 1rem;
}

.constitution-settings[hidden] { display: none; }

.constitution-settings-world {
  display: grid;
  gap: .7rem;
  padding: 1rem;
  border: 1px solid #475467;
  border-radius: .75rem;
  background: #10201d;
}

.constitution-settings-world button,
.constitution-settings-world input[type="file"] {
  min-block-size: 2.75rem;
}

.constitution-settings-world [data-constitution-backup-list] {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.mainchat-staged-attachments {
  display: flex;
  gap: .5rem;
  max-block-size: min(35dvh, 18rem);
  padding-inline: .4rem;
  overflow-x: auto;
}

.mainchat-staged-attachments:empty { display: none; }

.attachment-document-card {
  min-inline-size: min(18rem, calc(100vw - 2rem));
  max-inline-size: 36rem;
  padding: .55rem;
  border: 1px solid #475467;
  border-radius: .75rem;
  background: #132522;
}

.attachment-document-card > button {
  margin-inline-end: .35rem;
  background: transparent;
  color: inherit;
}

.attachment-document-expanded {
  max-block-size: min(42dvh, 24rem);
  margin-block: .6rem;
  padding: .75rem;
  overflow: auto;
  overscroll-behavior: contain;
  border: 1px solid #344054;
  border-radius: .55rem;
  background: #0a1816;
}

.incision-editor-surface,
.attachment-import-surface {
  box-sizing: border-box;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  inline-size: 100%;
  block-size: 100dvh;
  min-block-size: 100dvh;
  padding-block-start: env(safe-area-inset-top, 0px);
  padding-inline-end: env(safe-area-inset-right, 0px);
  padding-inline-start: env(safe-area-inset-left, 0px);
  overflow: hidden;
  background: #0a1816;
  color: #f8fafc;
}

.incision-editor-content,
.attachment-import-content {
  display: grid;
  align-content: start;
  gap: .75rem;
  min-block-size: 0;
  padding: clamp(.75rem, 3vw, 1.5rem);
  overflow-y: auto;
}

.incision-editor-source {
  max-block-size: min(32dvh, 18rem);
  margin: 0;
  padding: .75rem;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border: 1px solid #344054;
  border-radius: .65rem;
  background: #132522;
}

.incision-prompt-editor textarea,
.incision-editor-output,
.attachment-import-editor {
  inline-size: 100%;
  min-block-size: 10rem;
  padding: .8rem;
  resize: vertical;
  border: 1px solid #667085;
  border-radius: .65rem;
  background: #132522;
  color: inherit;
  font: inherit;
}

.incision-editor-output { min-block-size: min(42dvh, 24rem); }

.incision-editor-actions,
.attachment-import-actions,
.incision-editor-section-counters {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
}

.incision-editor-actions button,
.attachment-import-actions button,
.attachment-import-actions label {
  min-block-size: 2.75rem;
}

.mainchat-danger-dialog,
.incision-unsaved-dialog,
.attachment-unsaved-dialog {
  max-inline-size: min(30rem, calc(100% - 2rem));
  padding: 1.2rem;
  border: 2px solid #f04438;
  border-radius: .9rem;
  background: #0a1816;
  color: #f8fafc;
}

.mainchat-danger-dialog::backdrop,
.incision-unsaved-dialog::backdrop,
.attachment-unsaved-dialog::backdrop { background: #000a; }

.mainchat-danger-dialog button { margin: .3rem; background: #132522; color: inherit; }
.mainchat-danger-dialog [data-mainchat-danger-choice="confirm"],
.mainchat-new-thread-dialog [data-mainchat-new-thread-choice="clean"] {
  border-color: #f97066;
  background: #7a271a;
  color: #fff;
}

@media (max-width: 42rem) {
  .mainchat-topbar { gap: .35rem; padding-inline: .45rem; }
  .mainchat-brand-label { font-size: .9rem; }
  .mainchat-topbar-right { gap: .25rem; }
  .mainchat-topbar-right button { min-block-size: 2.25rem; padding: .35rem .5rem; font-size: .82rem; }
  .mainchat-composer-form { grid-template-columns: minmax(0, 1fr) auto auto; }
  .mainchat-composer-form .mainchat-composer { grid-column: 1 / -1; }
  .mainchat-send-control { justify-self: end; }
  .mainchat-message { max-inline-size: 96%; }
}

/*
 * F15a R1 — base visuale e strutturale Mainchat v2.
 * Il mockup approvato governa composizione e gerarchia, non la grafica finale.
 */
html[data-runtime-mode="installed-app"] body {
  background:
    radial-gradient(circle at 50% -15%, #173d34 0, transparent 42%),
    #07110f;
}

[data-mainchat-runtime="installed"] {
  --mainchat-night: #07110f;
  --mainchat-aurora: #0a1816;
  --mainchat-surface: #10231f;
  --mainchat-surface-raised: #142e29;
  --mainchat-line: #285247;
  --mainchat-line-soft: #1b3932;
  --mainchat-emerald: #50d6ac;
  --mainchat-emerald-deep: #0f654f;
  --mainchat-text: #edf8f4;
  --mainchat-muted: #9ebcb3;
  position: relative;
  background:
    radial-gradient(circle at 50% 0, #12352d 0, transparent 34%),
    linear-gradient(180deg, var(--mainchat-aurora), var(--mainchat-night));
  color: var(--mainchat-text);
}

[data-mainchat-runtime="installed"] .mainchat-topbar {
  z-index: 4;
  min-block-size: 3.4rem;
  padding: .45rem clamp(.65rem, 2vw, 1.4rem);
  border-block-end: 1px solid color-mix(in srgb, var(--mainchat-line), transparent 18%);
  background: color-mix(in srgb, var(--mainchat-aurora), transparent 9%);
  box-shadow: 0 .45rem 1.4rem #0004;
  backdrop-filter: blur(1rem);
}

[data-mainchat-runtime="installed"] .mainchat-topbar-left,
[data-mainchat-runtime="installed"] .mainchat-topbar-right {
  gap: .35rem;
}

[data-mainchat-runtime="installed"] .mainchat-topbar-right {
  flex: 0 1 auto;
  overflow: visible;
}

[data-mainchat-runtime="installed"] .mainchat-brand-label {
  color: var(--mainchat-text);
  font-size: 1rem;
  font-weight: 720;
  letter-spacing: .02em;
}

.mainchat-icon {
  display: block;
  inline-size: 1.2rem;
  block-size: 1.2rem;
  flex: none;
  pointer-events: none;
}

.mainchat-icon-fallback {
  inline-size: 1rem;
  block-size: 1rem;
}

.mainchat-icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .42rem;
}

[data-mainchat-runtime="installed"] .mainchat-icon-button,
.mainchat-settings-screen .mainchat-icon-button {
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
}

[data-mainchat-runtime="installed"] .mainchat-icon-button:hover:not(:disabled),
.mainchat-settings-screen .mainchat-icon-button:hover:not(:disabled) {
  border-color: var(--mainchat-line, #285247);
  background: #ffffff0a;
}

[data-mainchat-runtime="installed"] .mainchat-command-control {
  min-block-size: 2.35rem;
  padding: .35rem .62rem;
  color: var(--mainchat-muted);
  font-size: .82rem;
  font-weight: 620;
}

[data-mainchat-runtime="installed"] .mainchat-command-control:hover:not(:disabled),
[data-mainchat-runtime="installed"] .mainchat-settings-control:hover:not(:disabled) {
  color: var(--mainchat-emerald);
}

[data-mainchat-runtime="installed"] .mainchat-status-led,
[data-mainchat-runtime="installed"] .mainchat-settings-control {
  inline-size: 2.35rem;
  block-size: 2.35rem;
  min-block-size: 2.35rem;
  padding: 0;
}

[data-mainchat-runtime="installed"] .mainchat-status-led .mainchat-icon {
  inline-size: .95rem;
  block-size: .95rem;
  fill: currentColor;
  stroke-width: 1.2;
  filter: drop-shadow(0 0 .35rem currentColor);
}

[data-mainchat-runtime="installed"] .mainchat-sync-status {
  border-color: var(--mainchat-line);
  background: var(--mainchat-surface-raised);
  color: var(--mainchat-text);
}

[data-mainchat-runtime="installed"] .mainchat-operational-banner {
  z-index: 3;
  border-color: #a9752d;
  background: #33270f;
}

[data-mainchat-runtime="installed"] .mainchat-operational-banner button {
  min-block-size: 2.2rem;
  border-color: currentColor;
  background: transparent;
}

[data-mainchat-runtime="installed"] .mainchat-viewport-scrollport {
  background:
    linear-gradient(180deg, transparent, #07110f8c),
    radial-gradient(circle at 50% 0, #16423638 0, transparent 52%);
  scrollbar-color: var(--mainchat-line) transparent;
}

[data-mainchat-runtime="installed"] .mainchat-conversation-surface {
  inline-size: min(100%, 78rem);
  min-block-size: 100%;
  margin-inline: auto;
  gap: 1rem;
  padding: clamp(1rem, 3vw, 2.4rem) clamp(.8rem, 4vw, 3.5rem) 2rem;
}

.mainchat-opening-hero {
  display: grid;
  place-content: center;
  flex: 1 0 min(26rem, 58dvh);
  min-block-size: min(26rem, 58dvh);
  padding: clamp(2rem, 8vw, 6rem) 1rem;
  text-align: center;
}

.mainchat-opening-hero h1 {
  margin: 0;
  color: var(--mainchat-text);
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  font-size: clamp(2rem, 6vw, 4.8rem);
  font-weight: 540;
  letter-spacing: -.035em;
  text-wrap: balance;
}

.mainchat-opening-hero p {
  margin: .8rem 0 0;
  color: var(--mainchat-emerald);
  font-size: clamp(.95rem, 2vw, 1.2rem);
  letter-spacing: .08em;
}

[data-mainchat-runtime="installed"] .mainchat-message {
  max-inline-size: min(50rem, 88%);
  padding: .9rem 1.05rem;
  border-color: var(--mainchat-line-soft);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--mainchat-surface), transparent 5%);
  box-shadow: 0 .7rem 1.8rem #0002;
}

/* Tinta del Custode provvisoria R1: riuso della tinta installata v1, non del mockup. */
[data-mainchat-runtime="installed"] .mainchat-message-custode {
  align-self: flex-end;
  border-end-end-radius: .3rem;
  border-color: #40536e;
  background: #26364c;
}

[data-mainchat-runtime="installed"] .mainchat-message-andrew {
  align-self: flex-start;
  border-inline-start: .2rem solid var(--mainchat-emerald);
  border-start-start-radius: .3rem;
  background: linear-gradient(115deg, #123028, var(--mainchat-surface));
}

[data-mainchat-runtime="installed"] .mainchat-message-author {
  color: var(--mainchat-emerald);
  font-size: .76rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

[data-mainchat-runtime="installed"] .mainchat-message-custode .mainchat-message-author {
  color: #cbd6e6;
}

[data-mainchat-runtime="installed"] .mainchat-message-actions {
  flex-wrap: wrap;
  opacity: .78;
}

[data-mainchat-runtime="installed"] .mainchat-message-actions button {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  border-color: transparent;
  color: var(--mainchat-muted);
}

[data-mainchat-runtime="installed"] .mainchat-message-actions .mainchat-icon {
  inline-size: .95rem;
  block-size: .95rem;
}

[data-mainchat-runtime="installed"] .mainchat-viewport-bottom-zone {
  z-index: 3;
  border-color: var(--mainchat-line-soft);
  background: color-mix(in srgb, var(--mainchat-night), transparent 4%);
  box-shadow: 0 -.9rem 2rem #0005;
}

[data-mainchat-runtime="installed"] .mainchat-composer-form {
  grid-template-columns: auto minmax(0, 1fr) auto;
  inline-size: min(100%, 78rem);
  margin-inline: auto;
  padding: .65rem clamp(.65rem, 3vw, 1.4rem);
  gap: .5rem;
  background: transparent;
}

.mainchat-composer-leading-actions {
  display: flex;
  align-items: center;
  gap: .2rem;
}

[data-mainchat-runtime="installed"] .mainchat-composer-form .mainchat-composer {
  min-block-size: 3rem;
  max-block-size: min(34dvh, 14rem);
  padding: .78rem 1rem;
  border-color: var(--mainchat-line);
  border-radius: 1.25rem;
  background: var(--mainchat-surface);
  color: var(--mainchat-text);
  box-shadow: inset 0 0 0 1px #ffffff05;
}

[data-mainchat-runtime="installed"] .mainchat-composer::placeholder {
  color: var(--mainchat-muted);
}

[data-mainchat-runtime="installed"] .mainchat-resonance-control,
[data-mainchat-runtime="installed"] .mainchat-attachment-control,
[data-mainchat-runtime="installed"] .mainchat-send-control {
  inline-size: 3rem;
  block-size: 3rem;
  min-block-size: 3rem;
  padding: 0;
  border-radius: 50%;
  color: var(--mainchat-muted);
}

[data-mainchat-runtime="installed"] .mainchat-resonance-control {
  color: var(--mainchat-emerald);
}

[data-mainchat-runtime="installed"] .mainchat-send-control {
  border-color: var(--mainchat-emerald-deep);
  background: var(--mainchat-emerald-deep);
  color: #f3fffb;
  box-shadow: 0 .35rem 1rem #0005;
}

[data-mainchat-runtime="installed"] .mainchat-staged-attachments {
  inline-size: min(100%, 78rem);
  margin-inline: auto;
  padding: .5rem clamp(.65rem, 3vw, 1.4rem) 0;
}

[data-mainchat-runtime="installed"] .mainchat-unseen-control {
  inset-block-end: 1.2rem;
  border-color: var(--mainchat-emerald);
  background: var(--mainchat-surface-raised);
  color: var(--mainchat-emerald);
  box-shadow: 0 .5rem 1.3rem #0008;
}

.mainchat-settings-screen {
  background:
    radial-gradient(circle at 50% 0, #12352d 0, transparent 34%),
    #07110f;
  color: #edf8f4;
}

.mainchat-settings-screen .mainchat-topbar {
  border-color: #285247;
  background: #0a1816ed;
  backdrop-filter: blur(1rem);
}

.mainchat-settings-screen .mainchat-settings-back {
  color: #9ebcb3;
}

@media (max-width: 64rem) {
  [data-mainchat-runtime="installed"] .mainchat-command-control {
    padding-inline: .48rem;
  }

  [data-mainchat-runtime="installed"] .mainchat-command-control .mainchat-icon-label {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
  }
}

@media (max-width: 42rem) {
  [data-mainchat-runtime="installed"] .mainchat-topbar {
    min-block-size: 3rem;
    padding-inline: .4rem;
  }

  [data-mainchat-runtime="installed"] .mainchat-brand-label {
    font-size: .88rem;
  }

  [data-mainchat-runtime="installed"] .mainchat-command-control,
  [data-mainchat-runtime="installed"] .mainchat-settings-control,
  [data-mainchat-runtime="installed"] .mainchat-status-led {
    inline-size: 2.15rem;
    block-size: 2.15rem;
    min-block-size: 2.15rem;
    padding: 0;
  }

  [data-mainchat-runtime="installed"] .mainchat-conversation-surface {
    padding: .85rem .7rem 1.4rem;
  }

  .mainchat-opening-hero {
    flex-basis: min(22rem, 52dvh);
    min-block-size: min(22rem, 52dvh);
    padding-inline: .5rem;
  }

  [data-mainchat-runtime="installed"] .mainchat-message {
    max-inline-size: 94%;
  }

  [data-mainchat-runtime="installed"] .mainchat-composer-form {
    grid-template-columns: minmax(0, 1fr) auto;
    padding: .45rem .55rem;
  }

  [data-mainchat-runtime="installed"] .mainchat-composer-leading-actions {
    grid-column: 1 / -1;
    justify-self: start;
  }

  [data-mainchat-runtime="installed"] .mainchat-composer-form .mainchat-composer {
    grid-column: 1;
  }

  [data-mainchat-runtime="installed"] .mainchat-send-control {
    grid-column: 2;
  }
}

.mainchat-viewport-shell {
  --mainchat-safe-top: env(safe-area-inset-top, 0px);
  --mainchat-safe-right: env(safe-area-inset-right, 0px);
  --mainchat-safe-bottom: env(safe-area-inset-bottom, 0px);
  --mainchat-safe-left: env(safe-area-inset-left, 0px);

  box-sizing: border-box;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  block-size: 100dvh;
  min-block-size: 100dvh;
  padding-block-start: var(--mainchat-safe-top);
  padding-inline-end: var(--mainchat-safe-right);
  padding-inline-start: var(--mainchat-safe-left);
  overflow: hidden;
}

/*
 * S33 compatibility profile. The bank/device integration may select this on the
 * single viewport shell only when the system already reserves the Home area.
 */
.mainchat-viewport-shell[data-bottom-profile="system-reserved-zero"] {
  --mainchat-safe-bottom: 0px;
}

.mainchat-viewport-scrollport {
  min-block-size: 0;
  overflow-y: auto;
  overscroll-behavior-y: contain;
}

.mainchat-viewport-bottom-zone {
  padding-block-end: var(--mainchat-safe-bottom);
}

.mainchat-landscape-veil {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: none;
  place-items: center;
  background-color: #000;
}

@media (orientation: landscape) and (hover: none) and (pointer: coarse) {
  .mainchat-landscape-veil {
    display: grid;
  }
}