:root {
  --font-body: "Aptos", "Segoe UI Variable", "SF Pro Text", sans-serif;
  --font-display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --bg: #f6f1e8;
  --bg-elevated: rgba(255, 255, 255, 0.74);
  --bg-strong: rgba(255, 255, 255, 0.88);
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --surface-muted: rgba(69, 57, 46, 0.08);
  --text: #181611;
  --text-soft: rgba(24, 22, 17, 0.72);
  --text-faint: rgba(24, 22, 17, 0.56);
  --accent: #0f7a7a;
  --accent-strong: #1d9b96;
  --accent-soft: rgba(15, 122, 122, 0.16);
  --highlight: #ff8e5a;
  --warning: #d67a28;
  --danger: #b44444;
  --shadow-lg: 0 28px 70px rgba(41, 30, 17, 0.18);
  --shadow-md: 0 16px 42px rgba(41, 30, 17, 0.12);
  --shadow-sm: 0 8px 24px rgba(41, 30, 17, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --space-1: 0.35rem;
  --space-2: 0.65rem;
  --space-3: 0.95rem;
  --space-4: 1.25rem;
  --space-5: 1.6rem;
  --space-6: 2rem;
  --max-width: 1120px;
}

html[data-theme="dark"] {
  --bg: #0d1015;
  --bg-elevated: rgba(19, 24, 33, 0.84);
  --bg-strong: rgba(19, 24, 33, 0.94);
  --surface: rgba(19, 24, 33, 0.72);
  --surface-strong: rgba(24, 30, 41, 0.92);
  --surface-muted: rgba(125, 166, 194, 0.14);
  --text: #f5f3ee;
  --text-soft: rgba(245, 243, 238, 0.72);
  --text-faint: rgba(245, 243, 238, 0.58);
  --accent: #63d9d1;
  --accent-strong: #90f3ec;
  --accent-soft: rgba(99, 217, 209, 0.14);
  --highlight: #f1a45f;
  --warning: #f3b35a;
  --danger: #f08c8c;
  --shadow-lg: 0 28px 70px rgba(2, 5, 10, 0.48);
  --shadow-md: 0 16px 42px rgba(2, 5, 10, 0.36);
  --shadow-sm: 0 8px 24px rgba(2, 5, 10, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 14%, rgba(255, 169, 111, 0.24), transparent 24%),
    radial-gradient(circle at 88% 0%, rgba(79, 191, 191, 0.22), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent 30%),
    var(--bg);
  padding: env(safe-area-inset-top, 0px) 0 env(safe-area-inset-bottom, 0px);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.34), transparent 75%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.34), transparent 75%);
  pointer-events: none;
}

.ambient {
  position: fixed;
  width: 18rem;
  height: 18rem;
  filter: blur(30px);
  opacity: 0.32;
  pointer-events: none;
}

.ambient--one {
  top: -2rem;
  left: -2rem;
  background: radial-gradient(circle, rgba(255, 145, 91, 0.9), transparent 65%);
}

.ambient--two {
  right: -3rem;
  bottom: 20%;
  background: radial-gradient(circle, rgba(79, 191, 191, 0.9), transparent 68%);
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

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

a {
  color: inherit;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: calc(1.15rem + env(safe-area-inset-top, 0px)) 1rem calc(5rem + env(safe-area-inset-bottom, 0px));
}

.app-bar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.eyebrow {
  margin: 0 0 var(--space-1);
  color: var(--text-faint);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.04;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.45rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h3 {
  font-size: 1.05rem;
}

p {
  margin: 0;
}

.screen-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.32);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
}

.screen-nav__button {
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-soft);
  padding: 0.7rem 1rem;
  transition: background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.screen-nav__button.is-active {
  background: var(--bg-strong);
  color: var(--text);
}

.screen-stack {
  display: grid;
}

.screen {
  display: none;
  gap: var(--space-4);
}

.screen.is-active {
  display: grid;
}

.panel {
  position: relative;
  overflow: hidden;
  padding: var(--space-5);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.16), transparent 42%);
  pointer-events: none;
}

.connection-card {
  background:
    radial-gradient(circle at top left, rgba(255, 161, 110, 0.2), transparent 30%),
    radial-gradient(circle at top right, rgba(99, 217, 209, 0.16), transparent 34%),
    var(--surface-strong);
}

.connection-card__header,
.section-heading,
.composer-card__foot,
.settings-card,
.sheet__header,
.sheet__actions,
.connection-card__actions,
.connection-card__meta,
.connection-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.connection-card__header,
.section-heading,
.connection-card__meta,
.connection-card__actions {
  margin-bottom: var(--space-4);
}

.connection-card__copy,
.section-heading__note,
.inline-note,
.settings-card__note,
.sheet__note,
.selection-meta,
.meta-tile__subtext {
  color: var(--text-soft);
}

.status-pill {
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.status-pill[data-status="connected"] {
  background: rgba(46, 171, 132, 0.18);
  color: #2eab84;
}

.status-pill[data-status="hosting"],
.status-pill[data-status="joining"] {
  background: rgba(241, 164, 95, 0.18);
  color: var(--highlight);
}

.status-pill[data-status="reconnecting"] {
  background: rgba(214, 122, 40, 0.18);
  color: var(--warning);
}

.status-pill[data-status="error"] {
  background: rgba(180, 68, 68, 0.16);
  color: var(--danger);
}

.meta-tile {
  flex: 1;
  min-width: 0;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.48);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

html[data-theme="dark"] .meta-tile {
  background: rgba(26, 32, 44, 0.72);
}

.meta-tile__label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text-faint);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.meta-tile__value {
  display: block;
  margin-bottom: 0.2rem;
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.meta-tile__value--small {
  font-size: 1.15rem;
  letter-spacing: normal;
}

.button,
.icon-button,
.composer-tab,
.switch__track {
  transition: transform 180ms ease, opacity 180ms ease, background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.button {
  min-height: 3rem;
  padding: 0.82rem 1.2rem;
  border: 1px solid transparent;
  border-radius: 18px;
  font-weight: 700;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.button:not(:disabled):active,
.composer-tab:active,
.screen-nav__button:active,
.icon-button:active {
  transform: scale(0.98);
}

.button--primary {
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: #071012;
  box-shadow: 0 14px 30px rgba(15, 122, 122, 0.26);
}

.button--secondary {
  background: var(--bg-strong);
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.34);
}

.button--ghost {
  background: transparent;
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.24);
}

.action-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.section-heading {
  align-items: end;
}

.composer-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
  margin-bottom: var(--space-4);
}

.composer-tab {
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 16px;
  background: transparent;
  color: var(--text-soft);
  min-height: 2.85rem;
}

.composer-tab.is-active {
  border-color: transparent;
  background: rgba(255, 255, 255, 0.68);
  color: var(--text);
}

html[data-theme="dark"] .composer-tab.is-active {
  background: rgba(34, 41, 54, 0.92);
}

.composer-stack {
  display: grid;
}

.composer-card {
  display: none;
}

.composer-card.is-active {
  display: grid;
  gap: var(--space-3);
}

.field-label {
  color: var(--text-soft);
  font-size: 0.92rem;
}

textarea,
.code-input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.45);
  color: var(--text);
  padding: 1rem 1.1rem;
  outline: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

html[data-theme="dark"] textarea,
html[data-theme="dark"] .code-input {
  background: rgba(24, 30, 41, 0.8);
}

textarea:focus,
.code-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

textarea {
  min-height: 11rem;
  resize: vertical;
}

.picker-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.picker-row--single {
  justify-content: flex-start;
}

.selection-card,
.transfer-item,
.received-card,
.settings-card {
  padding: 1rem 1.05rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.46);
  box-shadow: var(--shadow-sm);
}

html[data-theme="dark"] .selection-card,
html[data-theme="dark"] .transfer-item,
html[data-theme="dark"] .received-card,
html[data-theme="dark"] .settings-card {
  background: rgba(24, 30, 41, 0.76);
}

.selection-card {
  min-height: 11rem;
  display: grid;
  place-items: center;
  text-align: center;
}

.selection-card__empty,
.empty-state {
  color: var(--text-faint);
}

.selection-card__media {
  width: 100%;
  border-radius: 18px;
  object-fit: cover;
  max-height: 18rem;
}

.selection-meta {
  width: 100%;
  display: grid;
  gap: 0.25rem;
  text-align: left;
}

.selection-meta strong {
  color: var(--text);
}

.transfer-list,
.received-list {
  display: grid;
  gap: 0.9rem;
}

.transfer-item__header,
.received-card__header,
.received-card__actions,
.received-file-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.transfer-item__header,
.transfer-item__progress,
.received-card__header,
.received-card__actions,
.received-card__body,
.received-file-meta,
.settings-panel {
  margin-bottom: 0.75rem;
}

.transfer-item__progress {
  height: 0.55rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.transfer-item__progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--highlight), var(--accent));
}

.transfer-item__meta,
.received-file-meta,
.diagnostics-list,
.sheet__note {
  color: var(--text-soft);
  font-size: 0.92rem;
}

.received-card {
  display: grid;
  gap: 0.85rem;
}

.received-card--text {
  background: #ffffff;
  color: #161617;
}

.received-card--text .button--ghost,
.received-card--text .button--secondary {
  color: #161617;
  border-color: rgba(22, 22, 23, 0.14);
}

.received-text {
  max-height: 16rem;
  overflow: auto;
  padding: 1rem;
  border-radius: 16px;
  background: rgba(17, 17, 17, 0.04);
  white-space: pre-wrap;
  word-break: break-word;
}

.received-card__media {
  width: 100%;
  max-height: 21rem;
  border-radius: 18px;
  object-fit: contain;
  background: rgba(0, 0, 0, 0.08);
}

.received-card__actions {
  flex-wrap: wrap;
}

.received-file-meta {
  flex-wrap: wrap;
}

.settings-panel {
  display: grid;
  gap: 1rem;
}

.settings-card {
  display: grid;
  gap: 0.85rem;
}

.settings-card--actions {
  justify-items: start;
}

.diagnostics-list {
  margin: 0;
  padding-left: 1rem;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
}

.switch input {
  position: absolute;
  opacity: 0;
}

.switch__track {
  position: relative;
  width: 3.2rem;
  height: 1.85rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.16);
}

.switch__track::after {
  content: "";
  position: absolute;
  top: 0.19rem;
  left: 0.22rem;
  width: 1.45rem;
  height: 1.45rem;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.16);
  transition: transform 180ms ease;
}

.switch input:checked + .switch__track {
  background: linear-gradient(135deg, var(--highlight), var(--accent));
}

.switch input:checked + .switch__track::after {
  transform: translateX(1.3rem);
}

.sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 12;
  display: grid;
  align-items: end;
  padding: 1rem;
  background: rgba(7, 11, 15, 0.42);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.sheet-backdrop[hidden] {
  display: none;
}

.sheet {
  width: min(100%, 32rem);
  margin: 0 auto;
  padding: 1.25rem;
  border-radius: 28px;
  background: var(--bg-strong);
  box-shadow: var(--shadow-lg);
}

.icon-button {
  width: 2.6rem;
  height: 2.6rem;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  color: var(--text);
  font-size: 1.8rem;
  line-height: 1;
}

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

.toast-region {
  position: fixed;
  right: 1rem;
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  z-index: 14;
  display: grid;
  gap: 0.7rem;
  width: min(22rem, calc(100vw - 2rem));
}

.toast {
  padding: 0.95rem 1rem;
  border-radius: 18px;
  background: rgba(15, 16, 22, 0.94);
  color: #f8f7f2;
  box-shadow: var(--shadow-lg);
}

.toast[data-tone="error"] {
  background: rgba(135, 44, 44, 0.96);
}

.toast[data-tone="success"] {
  background: rgba(22, 90, 72, 0.96);
}

.noscript {
  position: fixed;
  inset: auto 1rem 1rem;
  z-index: 20;
  padding: 1rem;
  border-radius: 18px;
  background: rgba(145, 40, 40, 0.96);
  color: #fff;
}

@media (min-width: 780px) {
  .screen[data-screen="bridge"] {
    grid-template-columns: 1.08fr 0.92fr;
  }

  .screen[data-screen="bridge"] .connection-card,
  .screen[data-screen="bridge"] .transfer-panel,
  .screen[data-screen="bridge"] .inbox-panel {
    grid-column: 1 / span 2;
  }

  .composer-panel {
    grid-column: 1 / 2;
  }

  .transfer-panel {
    align-self: start;
  }

  .app-shell {
    padding-inline: 1.5rem;
  }
}

@media (max-width: 779px) {
  .app-bar,
  .connection-card__header,
  .section-heading,
  .connection-card__meta,
  .connection-card__actions,
  .composer-card__foot,
  .settings-card,
  .received-card__header,
  .received-card__actions,
  .transfer-item__header,
  .sheet__header,
  .sheet__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .screen-nav {
    align-self: stretch;
    justify-content: space-between;
  }

  .connection-card__actions .button,
  .picker-row .button,
  .sheet__actions .button {
    width: 100%;
  }
}