/* Wormhole — dark minimalist theme (M3 tokens + Manrope) */
:root {
  /* Palette */
  --wh-bg: #0b0d10;
  --wh-surface: #171c22;
  --wh-surface-variant: #2a333d;
  --wh-muted: #5d6f82;
  --wh-text: #e7eef5;

  /* M3 role mapping */
  --md-primary: var(--wh-text);
  --md-on-primary: var(--wh-bg);
  --md-primary-container: var(--wh-surface-variant);
  --md-on-primary-container: var(--wh-text);
  --md-secondary-container: var(--wh-surface-variant);
  --md-on-secondary-container: var(--wh-text);
  --md-surface: var(--wh-bg);
  --md-surface-container: var(--wh-surface);
  --md-on-surface: var(--wh-text);
  --md-on-surface-variant: var(--wh-muted);
  --md-outline: var(--wh-surface-variant);
  --md-error: #f87171;
  --md-success: #6ee7a8;

  --md-radius-lg: 12px;
  --md-radius-md: 8px;
  --md-radius-sm: 6px;

  --space-page-x: clamp(16px, 4vw, 56px);
  --space-page-y: clamp(24px, 5vw, 64px);
  --space-page-bottom: clamp(32px, 5vw, 64px);
  --space-card: clamp(18px, 3.25vw, 32px);
  --space-stack: clamp(14px, 2vw, 20px);
  --touch-min: 44px;

  color-scheme: dark;
  font-family: "Manrope", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--md-surface);
  color: var(--md-on-surface);
  min-height: 100vh;
  min-height: 100dvh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  overflow-x: clip;
}

/* Top app bar */
.m3-top-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: clamp(16px, 2.5vw, 28px) var(--space-page-x);
  padding-top: max(clamp(16px, 2.5vw, 28px), env(safe-area-inset-top));
  border-bottom: 1px solid var(--md-outline);
}
.m3-top-bar .brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--md-on-surface);
  text-decoration: none;
  flex-shrink: 0;
}
.m3-top-bar .brand .material-symbols-outlined {
  font-size: 1.125rem;
  color: var(--wh-muted);
}
.m3-top-bar .tagline-block {
  position: relative;
  min-width: 0;
  margin-left: auto;
}
.m3-top-bar .tagline-row {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.m3-top-bar .tagline {
  margin: 0;
  color: #8295a9;
  font-size: clamp(0.8125rem, 1.2vw, 0.9375rem);
  font-weight: 400;
  line-height: 1.45;
  min-width: 0;
}
.tagline-info-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin: 0;
  padding: 0;
  flex-shrink: 0;
  border: 1px solid transparent;
  border-radius: var(--md-radius-sm);
  background: transparent;
  color: var(--wh-muted);
  cursor: pointer;
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}
.tagline-info-btn:hover,
.tagline-info-btn[aria-expanded="true"] {
  border-color: var(--md-outline);
  background: var(--wh-surface-variant);
  color: var(--wh-text);
}
.tagline-info-btn .material-symbols-outlined {
  font-size: 1rem;
}
.tagline-info-body {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-sm);
  background: var(--wh-surface);
  color: var(--wh-muted);
  font-size: 0.75rem;
  line-height: 1.45;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
@media (min-width: 641px) {
  .tagline-info-body:not([hidden]) {
    position: absolute;
    z-index: 20;
    top: calc(100% + 6px);
    right: 0;
    width: min(16rem, calc(100vw - 2 * var(--space-page-x) - 16px));
  }
}

@media (min-width: 641px) {
  .container.tunnel {
    width: min(100%, 56rem);
  }

  .container:not(.tunnel) .hero {
    padding: clamp(28px, 4vw, 44px);
  }

  .container:not(.tunnel) .m3-headline {
    max-width: 16ch;
  }
}

.container {
  width: min(100%, 52rem);
  max-width: none;
  margin: 0 auto;
  padding: var(--space-page-y) var(--space-page-x) max(var(--space-page-bottom), env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 2vw, 20px);
}
.container:not(.tunnel) {
  min-height: calc(100dvh - 5rem);
  justify-content: center;
}
.container:not(.tunnel) .hero {
  width: min(100%, 42rem);
  margin: 0 auto;
}

/* Cards — flat, border-only depth */
.m3-card {
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-lg);
  padding: var(--space-card);
}
.hero { text-align: left; }
.m3-card > .m3-label:first-child { margin-top: 0; }
.m3-card > .m3-body:last-child { margin-bottom: 0; }
.m3-headline {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.m3-title {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.m3-label {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--wh-muted);
  margin: 0 0 8px;
}
.m3-body {
  color: var(--wh-muted);
  font-size: clamp(0.875rem, 1.4vw, 1rem);
  line-height: 1.55;
  margin: 0 0 clamp(16px, 2.5vw, 24px);
}

.stack { display: flex; flex-direction: column; gap: var(--space-stack); }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.action-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

/* Text fields */
.m3-field { display: flex; flex-direction: column; gap: 6px; }
.m3-field span {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--wh-muted);
}
.m3-field input {
  min-height: var(--touch-min);
  padding: 12px 14px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-sm);
  font: inherit;
  font-size: max(16px, 0.9375rem);
  background: var(--wh-bg);
  color: var(--md-on-surface);
  transition: border-color 0.15s ease;
  width: 100%;
  min-width: 0;
}
.m3-field input.join-link {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: max(16px, 0.8125rem);
  word-break: break-all;
  overflow-wrap: anywhere;
}
.m3-field input::placeholder { color: var(--wh-muted); opacity: 0.7; }
.m3-field input:focus-visible {
  outline: none;
  border-color: var(--wh-muted);
}
.m3-field input.anonymous-active {
  color: var(--wh-text);
  border-color: var(--wh-muted);
  cursor: default;
}

/* Anonymous mode toggle */
.m3-choice {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.m3-choice input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--wh-text);
  flex-shrink: 0;
}
.m3-choice span {
  font-size: 0.875rem;
  color: var(--wh-text);
}
.anonymous-reroll {
  align-self: flex-start;
}

/* Buttons — minimal, no pill excess */
.m3-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--touch-min);
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: var(--md-radius-sm);
  font: inherit;
  font-size: clamp(0.875rem, 1.2vw, 0.9375rem);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}
.m3-button .material-symbols-outlined { font-size: 1.125rem; }
.m3-button:hover { background: var(--wh-surface-variant); }
.m3-button:focus-visible {
  outline: 2px solid var(--wh-muted);
  outline-offset: 2px;
}
.m3-button.filled {
  background: var(--wh-text);
  color: var(--wh-bg);
  border-color: var(--wh-text);
}
.m3-button.filled:hover {
  background: #d4dde8;
  border-color: #d4dde8;
}
.m3-button.tonal {
  background: transparent;
  color: var(--wh-text);
  border-color: var(--md-outline);
}
.file-pick { width: fit-content; }

/* Result / created */
.result:empty { display: none; }
.created { margin-top: 8px; }
.join-link {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.8125rem;
}

/* Host share / invite block */
.host-share .m3-body {
  margin-bottom: 16px;
}
.host-share .share-qr-wrap {
  margin-bottom: 16px;
}
.host-share .m3-field {
  margin-bottom: 0;
}
.host-share .action-row {
  margin-top: 12px;
  gap: 6px;
}
.copy-join-feedback {
  min-height: 1.2em;
  margin: 0;
  color: var(--md-success);
  font-size: 0.75rem;
  line-height: 1.4;
}
#copy-join-link.copy-failed {
  border-color: rgba(248, 113, 113, 0.45);
  color: var(--md-error);
}
#copy-join-link.copy-failed + .copy-join-feedback {
  color: var(--md-error);
}

/* Join QR (post-create) */
.share-qr-wrap {
  text-align: center;
  margin: 0 0 20px;
}
.share-qr-wrap .m3-label {
  margin-bottom: 10px;
}
.share-qr {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  width: 200px;
  height: auto;
  border-radius: var(--md-radius-sm);
  border: 1px solid var(--md-outline);
  background: var(--wh-surface);
}
.share-qr[hidden],
.share-qr-fallback[hidden] {
  display: none;
}
.share-qr-fallback {
  margin: 8px 0 0;
  font-size: 0.75rem;
  color: var(--wh-muted);
}

/* Drop zone */
.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 28px 20px;
  border: 1px dashed var(--md-outline);
  border-radius: var(--md-radius-md);
  background: var(--wh-bg);
  text-align: center;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.drop-zone.drop-active {
  border-color: var(--wh-text);
  background: var(--wh-surface-variant);
}
.drop-zone.drop-disabled {
  opacity: 0.45;
  pointer-events: none;
}
.drop-zone-icon {
  font-size: 2rem;
  color: var(--wh-muted);
}
.drop-zone-label {
  font-size: 0.875rem;
  color: var(--wh-muted);
}
.drop-zone.drop-active .drop-zone-icon {
  animation: transfer-icon-pulse 1.2s ease-in-out infinite;
}

.session-ttl {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  margin: 10px 0 18px;
  padding: 8px 12px;
  border-radius: var(--md-radius-sm);
  background: var(--wh-bg);
  border: 1px solid var(--md-outline);
  font-size: 0.8125rem;
  color: var(--wh-muted);
  line-height: 1.4;
}
.session-ttl .material-symbols-outlined {
  font-size: 1rem;
  color: var(--wh-muted);
}
.session-ttl-warn {
  border-color: rgba(251, 191, 36, 0.45);
  color: #fbbf24;
}
.session-ttl-warn .material-symbols-outlined {
  color: #fbbf24;
}
.session-ttl-critical {
  border-color: rgba(248, 113, 113, 0.35);
  color: var(--md-error);
}
.session-ttl-critical .material-symbols-outlined {
  color: var(--md-error);
}

/* Status */
.status {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: var(--md-radius-sm);
  background: var(--wh-bg);
  border: 1px solid var(--md-outline);
  font-size: 0.8125rem;
  color: var(--wh-muted);
}
.session-ttl + .status {
  margin-top: 0;
}
.status.live {
  background: rgba(110, 231, 168, 0.08);
  border-color: rgba(110, 231, 168, 0.35);
  color: var(--md-success);
}
.status.live.transferring {
  background: var(--wh-surface-variant);
  border-color: var(--wh-muted);
  color: var(--wh-text);
}
.status.closed {
  background: rgba(248, 113, 113, 0.08);
  border-color: rgba(248, 113, 113, 0.35);
  color: var(--md-error);
}

/* Session stats + traveler roster */
.session-stats {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 12px 14px;
  margin-top: 8px;
  border-radius: var(--md-radius-sm);
  background: var(--wh-bg);
  border: 1px solid var(--md-outline);
  font-size: 0.8125rem;
  color: var(--wh-muted);
}
.session-stat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--wh-text);
}
.session-stat .material-symbols-outlined {
  font-size: 1rem;
  color: var(--wh-muted);
}
.session-stats-sep {
  color: var(--wh-muted);
  opacity: 0.45;
  user-select: none;
}
.roster-metrics li {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding: 0;
  overflow: hidden;
}
.roster-row-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
}
.roster-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.roster-row-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding: 8px 12px 10px;
  border-top: 1px solid var(--md-outline);
  font-size: 0.75rem;
  color: var(--wh-muted);
  font-variant-numeric: tabular-nums;
}
.roster-metric strong {
  color: var(--wh-text);
  font-weight: 600;
}
.roster li.roster-self {
  border-color: var(--wh-muted);
}
.roster li.roster-self .roster-row-head .material-symbols-outlined {
  color: var(--wh-text);
}

/* Roster + transfers */
.roster {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Transfers panel */
.transfers-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.transfers-panel-head .m3-label {
  margin: 0;
}
.transfers-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-left: auto;
}
.transfers-count {
  font-size: 0.75rem;
  color: var(--wh-muted);
  white-space: nowrap;
}
.transfer-toolbar-btn {
  appearance: none;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-radius-sm);
  background: var(--wh-bg);
  color: var(--wh-text);
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 6px 12px;
  cursor: pointer;
  white-space: nowrap;
}
.transfer-toolbar-btn:hover:not(:disabled) {
  border-color: var(--wh-muted);
  background: var(--wh-surface-variant);
}
.transfer-toolbar-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.transfers-scroll {
  margin-top: 12px;
  max-height: min(28rem, 52vh);
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
  scrollbar-gutter: stable;
  border-radius: var(--md-radius-sm);
}
.transfers-scroll:focus-within {
  outline: 1px solid var(--md-outline);
  outline-offset: 2px;
}
.transfers-scroll::-webkit-scrollbar {
  width: 8px;
}
.transfers-scroll::-webkit-scrollbar-thumb {
  background: var(--md-outline);
  border-radius: 999px;
}
.transfers-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.transfers-empty {
  margin: 0;
  padding: 20px 14px;
  text-align: center;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--wh-muted);
  border: 1px dashed var(--md-outline);
  border-radius: var(--md-radius-sm);
  background: var(--wh-bg);
}
.transfers {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.roster li {
  padding: 10px 12px;
  border-radius: var(--md-radius-sm);
  background: var(--wh-bg);
  border: 1px solid var(--md-outline);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
}
.roster li .material-symbols-outlined {
  font-size: 1.125rem;
  color: var(--wh-muted);
}
.roster .role {
  margin-left: auto;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--wh-muted);
}

/* File transfers */
.transfers li.transfer {
  padding: 12px;
  border-radius: var(--md-radius-sm);
  background: var(--wh-bg);
  border: 1px solid var(--md-outline);
  list-style: none;
}
.transfers li.transfer.active {
  border-color: var(--wh-muted);
  animation: transfer-border-pulse 1.6s ease-in-out infinite;
}
.transfers li.transfer.done {
  border-color: var(--md-outline);
  animation: none;
}
.transfers li.transfer.queued {
  border-color: rgba(93, 111, 130, 0.55);
  background: rgba(93, 111, 130, 0.08);
  animation: none;
}
.transfers li.transfer.failed {
  border-color: rgba(248, 113, 113, 0.45);
  background: rgba(248, 113, 113, 0.06);
  animation: none;
}
.transfers li.transfer.paused {
  border-color: rgba(251, 191, 36, 0.45);
  background: rgba(251, 191, 36, 0.06);
  animation: none;
}
.transfer-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-width: 0;
}
.transfer-icon {
  font-size: 1.125rem;
  color: var(--wh-muted);
  flex-shrink: 0;
  margin-top: 2px;
}
.transfer.active .transfer-icon {
  animation: transfer-icon-pulse 1.2s ease-in-out infinite;
}
.transfer.done .transfer-icon {
  color: var(--wh-text);
  animation: none;
}
.transfer.failed .transfer-icon,
.transfer.failed .transfer-status {
  color: var(--md-error);
  animation: none;
}
.transfer.paused .transfer-icon,
.transfer.paused .transfer-status {
  color: #fbbf24;
  animation: none;
}
.transfer.queued .transfer-icon,
.transfer.queued .transfer-status {
  color: var(--wh-muted);
  animation: none;
}
.transfer-body {
  flex: 1;
  min-width: 0;
}
.transfer-name {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--wh-text);
  overflow-wrap: anywhere;
  word-break: break-word;
}
.transfer-meta {
  display: block;
  margin-top: 3px;
  font-size: 0.75rem;
  color: var(--wh-muted);
  line-height: 1.4;
  overflow-wrap: anywhere;
}
.transfer-status {
  display: block;
  margin-top: 4px;
  font-size: 0.75rem;
  color: var(--wh-muted);
}
.transfer-progress {
  margin-top: 10px;
  height: 3px;
  border-radius: 999px;
  background: var(--wh-surface-variant);
  overflow: hidden;
}
.transfer-progress-bar {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: var(--wh-text);
  transition: width 0.2s ease;
}
.transfer.active .transfer-progress-bar {
  animation: transfer-bar-shimmer 1.4s ease-in-out infinite;
}
.transfer.done .transfer-progress-bar {
  animation: none;
}
.transfer.done .transfer-progress,
.transfer.rejected .transfer-progress,
.transfer.failed .transfer-progress {
  display: none;
}
.transfer.paused .transfer-progress-bar {
  background: rgba(251, 191, 36, 0.55);
}
.transfer.done .transfer-status {
  color: var(--md-success);
}
.transfer-preview {
  margin-top: 10px;
  border-radius: var(--md-radius-sm);
  border: 1px solid var(--md-outline);
  overflow: hidden;
  background: var(--wh-surface-variant);
}
.transfer-preview-media {
  display: block;
  max-width: 100%;
  width: auto;
  height: auto;
  margin: 0 auto;
}
.transfer-preview img.transfer-preview-media {
  max-height: 280px;
  object-fit: contain;
}
.transfer-preview video.transfer-preview-media {
  width: 100%;
  max-height: 320px;
  background: #000;
}
.transfer-child .transfer-preview img.transfer-preview-media {
  max-height: 180px;
}
.transfer-child .transfer-preview video.transfer-preview-media {
  max-height: 200px;
}
.transfer.rejected {
  border-color: rgba(248, 113, 113, 0.45);
  background: rgba(248, 113, 113, 0.06);
}
.transfer.rejected .transfer-icon {
  color: var(--md-error);
  animation: none;
}
.transfer.rejected .transfer-status {
  color: var(--md-error);
}
.transfer-action {
  margin-left: auto;
  flex-shrink: 0;
  align-self: center;
  color: var(--wh-text);
  font-weight: 500;
  font-size: 0.8125rem;
  text-decoration: none;
  border-bottom: 1px solid var(--wh-muted);
  white-space: nowrap;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}
.transfer.done .transfer-header {
  align-items: center;
}
.transfer.done .transfer-body {
  min-width: 0;
}
.transfer-child .transfer-meta {
  font-size: 0.6875rem;
}
.transfer-action:hover { border-bottom-color: var(--wh-text); }
.transfer-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
  margin-left: auto;
}
.transfer-dismiss {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--md-radius-sm);
  background: transparent;
  color: var(--wh-muted);
  cursor: pointer;
}
.transfer-dismiss:hover {
  border-color: var(--md-outline);
  background: var(--wh-surface-variant);
  color: var(--wh-text);
}
.transfer-dismiss .material-symbols-outlined {
  font-size: 1.125rem;
}
.transfer-cancel {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--md-radius-sm);
  background: transparent;
  color: var(--wh-muted);
  cursor: pointer;
}
.transfer-cancel:hover {
  border-color: var(--md-outline);
  background: var(--wh-surface-variant);
  color: var(--wh-text);
}
.transfer-cancel .material-symbols-outlined {
  font-size: 1.125rem;
}

/* Folder transfer groups */
.transfer-group > .transfer-header {
  align-items: center;
}
.transfer-toggle {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin: -4px 0;
  padding: 0;
  border: none;
  border-radius: var(--md-radius-sm);
  background: transparent;
  color: var(--wh-muted);
  cursor: pointer;
}
.transfer-toggle:hover {
  background: var(--wh-surface-variant);
  color: var(--wh-text);
}
.transfer-toggle .material-symbols-outlined {
  font-size: 1.25rem;
}
.transfer-tree {
  list-style: none;
  margin: 10px 0 0 18px;
  padding: 0 0 0 12px;
  border-left: 1px solid var(--md-outline);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.transfer-group.collapsed .transfer-tree {
  display: none;
}
.transfer-child {
  padding: 8px 10px;
  background: transparent;
  border-color: transparent;
}
.transfer-child.active {
  animation: none;
  border-color: var(--md-outline);
  background: rgba(231, 238, 245, 0.03);
}
.transfer-child .transfer-name {
  font-size: 0.8125rem;
  font-weight: 400;
}
.transfer-child .transfer-progress {
  margin-top: 6px;
  height: 2px;
}
.transfer-child .transfer-icon {
  font-size: 1rem;
  margin-top: 1px;
}
.transfer-group.done {
  animation: none;
}

.status.transferring {
  border-color: var(--wh-muted);
  color: var(--wh-text);
}

@keyframes transfer-border-pulse {
  0%, 100% { border-color: var(--wh-surface-variant); }
  50% { border-color: var(--wh-muted); }
}
@keyframes transfer-icon-pulse {
  0%, 100% { opacity: 1; transform: translateY(0); }
  50% { opacity: 0.55; transform: translateY(-1px); }
}
@keyframes transfer-bar-shimmer {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

@media (max-width: 640px) {
  :root {
    --space-page-x: 16px;
    --space-page-y: 20px;
    --space-page-bottom: max(28px, env(safe-area-inset-bottom));
    --space-card: 16px;
    --space-stack: 14px;
  }

  .m3-top-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 12px var(--space-page-x);
    padding-top: max(12px, env(safe-area-inset-top));
  }

  .m3-top-bar .brand {
    align-self: flex-start;
  }

  .m3-top-bar .tagline-block {
    width: 100%;
    margin-left: 0;
  }

  .m3-top-bar .tagline-row {
    gap: 8px;
  }

  .m3-top-bar .tagline {
    flex: 1;
    font-size: 0.8125rem;
  }

  .tagline-info-btn {
    width: 36px;
    height: 36px;
  }

  .tagline-info-body:not([hidden]) {
    margin-top: 8px;
    box-shadow: none;
  }

  .m3-choice {
    min-height: var(--touch-min);
    padding: 4px 0;
  }

  .m3-choice input[type="checkbox"] {
    width: 20px;
    height: 20px;
  }

  #join-gate.stack {
    gap: 16px;
  }

  .hero .m3-body {
    margin-bottom: 16px;
  }

  .container {
    gap: 12px;
    max-width: 100%;
  }

  .container:not(.tunnel) {
    min-height: auto;
    justify-content: flex-start;
  }

  .m3-card {
    padding: var(--space-card);
  }

  .m3-headline {
    font-size: 1.375rem;
    margin-bottom: 8px;
  }

  .m3-title {
    font-size: 1.0625rem;
    margin-bottom: 10px;
  }

  .m3-body {
    margin-bottom: 14px;
    font-size: 0.875rem;
    line-height: 1.55;
  }

  .m3-label {
    margin-bottom: 6px;
  }

  .stack > .m3-button,
  .hero .m3-button.filled,
  #connect-btn,
  .host-share .m3-button,
  .action-row .m3-button,
  .row .m3-button,
  .anonymous-reroll,
  .drop-zone .file-pick {
    width: 100%;
  }

  .session-ttl {
    width: 100%;
    margin-bottom: 16px;
  }

  .row {
    flex-direction: column;
    gap: 12px;
  }

  .status {
    margin-top: 14px;
    padding: 12px 14px;
    font-size: 0.8125rem;
    line-height: 1.45;
  }

  .session-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 12px;
  }

  .session-stats-sep {
    display: none;
  }

  .session-stat {
    width: 100%;
  }

  .transfers-panel-head {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .transfers-toolbar {
    margin-left: 0;
    width: 100%;
    justify-content: space-between;
  }

  .transfers-count {
    white-space: normal;
    line-height: 1.35;
    flex: 1;
    min-width: 0;
  }

  .drop-zone {
    padding: 22px 14px;
    gap: 12px;
  }

  .drop-zone-label {
    line-height: 1.45;
    max-width: 18rem;
  }

  .share-qr {
    width: min(200px, 100%);
  }

  .roster-row-head {
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
  }

  .roster-name {
    flex: 1 1 8rem;
    min-width: 0;
  }

  .roster .role {
    margin-left: 0;
    flex-shrink: 0;
  }

  .roster-row-metrics {
    padding: 10px 12px 12px;
    gap: 8px 12px;
  }

  .transfer-header {
    flex-wrap: wrap;
    gap: 8px;
  }

  .transfer:not(.transfer-child):not(.transfer-group) > .transfer-header {
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 8px;
  }

  .transfer:not(.transfer-child):not(.transfer-group) > .transfer-header > .transfer-body {
    flex: none;
    width: 100%;
  }

  .transfer.active:not(.transfer-child):not(.transfer-group) > .transfer-header > .transfer-icon {
    display: none;
  }

  .transfer-group > .transfer-header {
    display: grid;
    grid-template-columns: var(--touch-min) minmax(0, 1fr);
    column-gap: 10px;
    row-gap: 8px;
    align-items: start;
  }

  .transfer-group > .transfer-header > .transfer-toggle {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
  }

  .transfer-group > .transfer-header > .transfer-icon {
    display: none;
  }

  .transfer-group > .transfer-header > .transfer-body {
    grid-column: 2;
    grid-row: 1 / span 2;
    flex: none;
    width: auto;
    min-width: 0;
  }

  .transfer-group > .transfer-header > .transfer-actions {
    grid-column: 1 / -1;
  }

  .transfer-child > .transfer-header .transfer-body {
    flex: 1 1 calc(100% - 2rem);
    min-width: 0;
  }

  .transfer-toggle {
    width: var(--touch-min);
    height: var(--touch-min);
    margin: 0;
    flex-shrink: 0;
  }

  .transfer-tree {
    margin-left: 4px;
    padding-left: 10px;
  }

  .transfer-action {
    margin-left: 0;
    min-height: var(--touch-min);
    padding: 10px 4px;
    display: inline-flex;
    align-items: center;
  }

  .transfer-actions {
    flex: 1 0 100%;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
    width: 100%;
    margin-left: 0;
    margin-top: 4px;
    padding-top: 8px;
    border-top: 1px solid var(--md-outline);
  }

  .transfer.done > .transfer-header,
  .transfer.rejected > .transfer-header,
  .transfer.failed > .transfer-header {
    flex-direction: column;
    align-items: stretch;
    flex-wrap: nowrap;
    gap: 8px;
  }

  .transfer.done > .transfer-header > .transfer-body,
  .transfer.rejected > .transfer-header > .transfer-body,
  .transfer.failed > .transfer-header > .transfer-body,
  .transfer-group.done > .transfer-header > .transfer-body {
    flex: none;
    width: 100%;
  }

  .transfer.done > .transfer-header > .transfer-icon,
  .transfer.rejected > .transfer-header > .transfer-icon,
  .transfer.failed > .transfer-header > .transfer-icon {
    display: none;
  }

  .transfer-group.done > .transfer-header {
    display: grid;
    grid-template-columns: var(--touch-min) minmax(0, 1fr);
    column-gap: 10px;
    row-gap: 8px;
    align-items: start;
  }

  .transfer-group.done > .transfer-header > .transfer-toggle {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
  }

  .transfer-group.done > .transfer-header > .transfer-body {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .transfer.done .transfer-actions,
  .transfer.rejected .transfer-actions,
  .transfer.failed .transfer-actions {
    flex: none;
    width: 100%;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-top: 2px;
    padding-top: 10px;
    border-top: 1px solid var(--md-outline);
  }

  .transfer-group.done > .transfer-header > .transfer-actions {
    grid-column: 1 / -1;
    grid-row: 3;
  }

  .transfer.done .transfer-action,
  .transfer.rejected .transfer-action,
  .transfer.failed .transfer-action {
    flex: 1;
    min-width: 0;
    justify-content: center;
    text-align: center;
    border: 1px solid var(--md-outline);
    border-radius: var(--md-radius-sm);
    background: var(--wh-bg);
    border-bottom-color: var(--md-outline);
    padding: 10px 12px;
  }

  .transfer.done .transfer-dismiss,
  .transfer.rejected .transfer-dismiss,
  .transfer.failed .transfer-dismiss {
    flex: none;
  }

  .transfer-child.done > .transfer-header {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .transfer-child.done > .transfer-header > .transfer-icon {
    display: block;
  }

  .transfer-child.done .transfer-actions {
    flex: 1 0 100%;
    justify-content: flex-end;
    padding-top: 6px;
    margin-top: 0;
  }

  .transfer-child.done .transfer-action {
    flex: none;
    border: none;
    background: none;
    padding: 10px 4px;
  }

  .transfer-dismiss {
    width: var(--touch-min);
    height: var(--touch-min);
  }

  .transfer-cancel {
    width: var(--touch-min);
    height: var(--touch-min);
  }

  .transfer.active.recv:not(.transfer-child):not(.transfer-group) > .transfer-header {
    position: relative;
  }

  .transfer.active.recv:not(.transfer-child):not(.transfer-group)
    > .transfer-header
    > .transfer-actions {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 1;
  }

  .transfer.active.recv.transfer-child > .transfer-header {
    position: relative;
  }

  .transfer.active.recv.transfer-child > .transfer-header > .transfer-actions {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 1;
  }

  .transfer.paused > .transfer-header > .transfer-actions {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 1;
  }

  .transfers-scroll {
    max-height: min(20rem, 42dvh);
    padding-right: 0;
  }

  .transfer-toolbar-btn {
    min-height: var(--touch-min);
    padding: 8px 14px;
    flex-shrink: 0;
  }

  .roster li {
    padding: 0;
  }

  .transfers li.transfer {
    padding: 12px 14px;
  }

  .transfer-group {
    padding: 12px 14px;
  }

  .transfer-group .transfer-tree {
    margin: 8px 0 0 4px;
    padding-left: 10px;
  }

  .transfer.done .transfer-header,
  .transfer.rejected .transfer-header,
  .transfer.active .transfer-header,
  .transfer-group > .transfer-header {
    padding: 0;
  }
}

@media (max-width: 380px) {
  .m3-top-bar .tagline {
    font-size: 0.75rem;
  }

  .m3-field input.join-link {
    font-size: max(16px, 0.75rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}