:root {
  --transfer-bg: #000;
  --transfer-sidebar: #171717;
  --transfer-sidebar-hover: #252525;
  --transfer-panel: #212121;
  --transfer-panel-soft: #2f2f2f;
  --transfer-border: #2d2d2d;
  --transfer-text: #f4f4f4;
  --transfer-muted: #b4b4b4;
  --transfer-faint: #7d7d7d;
  --transfer-danger: #ff6b5f;
}

.transfer-page {
  min-height: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  color: var(--transfer-text);
  background: var(--transfer-bg);
}

.transfer-shell {
  width: 100%;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.transfer-login[hidden],
.transfer-app[hidden] {
  display: none !important;
}

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

.transfer-login {
  width: min(440px, calc(100% - 2rem));
  height: 100%;
  min-height: 0;
  margin: 0 auto;
  display: grid;
  align-content: center;
  gap: 1rem;
  padding: 2rem 0;
}

.login-card {
  display: grid;
  gap: 0.85rem;
  padding: 1rem;
  border: 1px solid var(--transfer-border);
  border-radius: 8px;
  background: var(--transfer-panel);
}

.field-label {
  color: var(--transfer-muted);
  font-weight: 700;
  font-size: 0.88rem;
}

.password-input,
.composer-input,
.chat-title-input,
.search-input,
.search-scope {
  width: 100%;
  color: var(--transfer-text);
  background: var(--transfer-panel);
  border: 1px solid var(--transfer-border);
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.password-input {
  min-height: 2.8rem;
  border-radius: 8px;
  padding: 0 0.85rem;
  font: inherit;
}

.password-input:focus,
.composer-input:focus,
.chat-title-input:focus,
.search-input:focus,
.search-scope:focus {
  border-color: #5f5f5f;
  background: var(--transfer-panel-soft);
}

.login-button,
.plain-button,
.send-button,
.composer-icon,
.copy-button,
.delete-button,
.download-link,
.icon-button,
.sidebar-action,
.sidebar-link,
.chat-list-item {
  font: inherit;
  cursor: pointer;
}

.login-button,
.send-button {
  min-height: 2.6rem;
  color: #111;
  background: #fff;
  border: 0;
  border-radius: 8px;
  font-weight: 700;
}

.plain-button,
.composer-icon,
.copy-button,
.delete-button,
.download-link,
.icon-button,
.sidebar-action,
.sidebar-link,
.chat-list-item {
  color: var(--transfer-text);
  background: transparent;
  border: 0;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease;
}

.plain-button:hover,
.composer-icon:hover,
.copy-button:hover,
.delete-button:hover,
.download-link:hover,
.icon-button:hover,
.sidebar-action:hover,
.sidebar-link:hover,
.chat-list-item:hover,
.chat-list-item[aria-current="page"] {
  background: var(--transfer-sidebar-hover);
}

.form-error,
.transfer-status {
  min-height: 1.25rem;
  margin: 0;
  color: var(--transfer-danger);
  font-size: 0.9rem;
}

.transfer-app {
  width: 100%;
  height: 100%;
  min-height: 0;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  background: var(--transfer-bg);
}

.chat-sidebar {
  min-height: 0;
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr) auto;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--transfer-sidebar);
  border-right: 1px solid var(--transfer-border);
}

.sidebar-header,
.chat-header,
.item-header,
.file-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.sidebar-brand {
  color: var(--transfer-text);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.05rem;
}

.sidebar-close {
  display: none;
}

.sidebar-action,
.sidebar-link,
.chat-list-item {
  width: 100%;
  min-height: 2.35rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0 0.65rem;
  text-align: left;
}

.sidebar-action {
  margin-top: 0.75rem;
  font-weight: 700;
}

.sidebar-action span {
  width: 1rem;
  text-align: center;
  font-size: 1.2rem;
  line-height: 1;
}

.sidebar-label {
  margin: 1rem 0 0.15rem;
  color: var(--transfer-muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.chat-list {
  min-height: 0;
  overflow-y: auto;
  display: grid;
  align-content: start;
  gap: 0.2rem;
  padding-right: 0.1rem;
  scrollbar-width: thin;
}

.chat-list-item {
  justify-content: space-between;
}

.chat-list-item span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-list-item small {
  flex: 0 0 auto;
  color: var(--transfer-faint);
  font-size: 0.75rem;
}

.sidebar-footer {
  display: grid;
  gap: 0.25rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--transfer-border);
}

.chat-main {
  position: relative;
  min-width: 0;
  min-height: 0;
  height: 100%;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  background: var(--transfer-bg);
}

.drop-overlay {
  position: absolute;
  z-index: 4;
  inset: 4.25rem 1rem 5.75rem;
  display: grid;
  place-items: center;
  border: 2px dashed #8f8f8f;
  border-radius: 8px;
  color: var(--transfer-text);
  background: rgba(33, 33, 33, 0.88);
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.985);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.chat-main.drop-active .drop-overlay {
  opacity: 1;
  transform: scale(1);
}

.chat-header {
  min-height: 3.5rem;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--transfer-border);
}

.mobile-menu-button {
  display: none;
}

.chat-title-group {
  min-width: 0;
  width: min(560px, 100%);
  display: grid;
  gap: 0.15rem;
}

.chat-title-input {
  min-height: 2.15rem;
  border-radius: 8px;
  padding: 0 0.65rem;
  font-weight: 800;
}

.chat-meta {
  min-height: 1rem;
  margin: 0;
  color: var(--transfer-faint);
  font-size: 0.75rem;
}

.chat-search {
  width: min(820px, calc(100% - 2rem));
  min-width: 0;
  justify-self: center;
  display: grid;
  gap: 0.5rem;
  padding: 0.7rem 0 0;
}

.search-controls {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 0.5rem;
}

.search-input,
.search-scope {
  min-height: 2.35rem;
  border-radius: 8px;
  padding: 0 0.7rem;
  font: inherit;
}

.search-scope {
  width: auto;
  min-width: 9rem;
}

.search-clear {
  min-width: 5rem;
}

.search-results {
  max-height: min(28vh, 16rem);
  overflow-y: auto;
  display: grid;
  gap: 0.35rem;
  padding: 0.45rem;
  border: 1px solid var(--transfer-border);
  border-radius: 8px;
  background: var(--transfer-panel);
  scrollbar-width: thin;
}

.search-results[hidden] {
  display: none;
}

.search-result,
.search-empty {
  min-width: 0;
  border-radius: 8px;
  color: var(--transfer-text);
  background: transparent;
}

.search-result {
  display: grid;
  gap: 0.2rem;
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: 0;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.search-result:hover,
.search-result:focus-visible {
  background: var(--transfer-sidebar-hover);
  outline: none;
}

.search-result strong,
.search-result span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.search-result strong {
  font-size: 0.83rem;
}

.search-result span {
  color: var(--transfer-muted);
  font-size: 0.86rem;
}

.search-empty {
  padding: 0.45rem 0.55rem;
  color: var(--transfer-muted);
  font-size: 0.86rem;
}

.plain-button {
  min-height: 2.25rem;
  padding: 0 0.75rem;
  white-space: nowrap;
}

.plain-button:disabled {
  cursor: default;
  color: var(--transfer-faint);
}

.transfer-feed {
  min-height: 0;
  width: min(820px, 100%);
  justify-self: center;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  overflow-y: auto;
  padding: 1.25rem 1rem 1rem;
  scrollbar-width: thin;
}

.empty-feed {
  margin: auto;
  color: var(--transfer-muted);
}

.transfer-item {
  display: grid;
  gap: 0.55rem;
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 8px;
  background: var(--transfer-panel);
}

.transfer-item.search-focus {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.transfer-item-file {
  border: 1px solid var(--transfer-border);
}

.item-header time {
  color: var(--transfer-faint);
  font-size: 0.78rem;
}

.item-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.copy-button,
.delete-button,
.download-link {
  min-height: 2rem;
  padding: 0.25rem 0.65rem;
  color: var(--transfer-muted);
  font-size: 0.8rem;
}

.delete-button:disabled {
  cursor: default;
  opacity: 0.6;
}

.message-text {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.55;
}

.message-text mark,
.search-result mark {
  color: #111;
  background: #ffe066;
  border-radius: 3px;
  padding: 0 0.1em;
}

.file-info {
  min-width: 0;
  display: grid;
  gap: 0.15rem;
}

.file-info strong,
.file-info span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-info span {
  color: var(--transfer-muted);
  font-size: 0.84rem;
}

.transfer-composer {
  width: min(820px, calc(100% - 2rem));
  justify-self: center;
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr) auto;
  align-items: end;
  gap: 0.55rem;
  margin-bottom: 0.35rem;
  padding: 0.55rem;
  border: 1px solid var(--transfer-border);
  border-radius: 8px;
  background: var(--transfer-panel);
}

.composer-icon,
.send-button {
  min-height: 2.6rem;
  padding: 0 0.85rem;
}

.composer-icon {
  font-size: 1.35rem;
}

.composer-input {
  min-height: 2.6rem;
  max-height: 180px;
  resize: none;
  border: 0;
  border-radius: 8px;
  padding: 0.72rem 0.85rem;
  font: inherit;
  line-height: 1.35;
}

.hidden-file {
  display: none;
}

.transfer-status {
  width: min(820px, calc(100% - 2rem));
  justify-self: center;
  padding-bottom: 0.35rem;
}

@media (max-width: 760px) {
  .transfer-app {
    grid-template-columns: minmax(0, 1fr);
  }

  .chat-sidebar {
    position: fixed;
    z-index: 10;
    inset: 0 auto 0 0;
    width: min(82vw, 300px);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: 22px 0 44px rgba(0, 0, 0, 0.38);
  }

  .sidebar-open .chat-sidebar {
    transform: translateX(0);
  }

  .sidebar-close,
  .mobile-menu-button {
    display: inline-flex;
  }

  .icon-button {
    min-height: 2.25rem;
    align-items: center;
    justify-content: center;
    padding: 0 0.75rem;
  }

  .chat-header {
    grid-template-columns: auto minmax(0, 1fr);
    flex-wrap: wrap;
  }

  .chat-title-group {
    width: auto;
    flex: 1 1 min(240px, 100%);
  }

  .plain-button {
    flex: 1 1 100%;
  }

  .transfer-feed {
    padding-inline: 0.75rem;
  }

  .transfer-composer {
    width: calc(100% - 1rem);
    grid-template-columns: 2.55rem minmax(0, 1fr);
  }

  .chat-search {
    width: calc(100% - 1rem);
  }

  .search-controls {
    grid-template-columns: minmax(0, 1fr) minmax(7.5rem, auto);
  }

  .search-clear {
    grid-column: 1 / -1;
  }

  .send-button {
    grid-column: 1 / -1;
  }

  .transfer-status {
    width: calc(100% - 1rem);
  }

  .item-header,
  .file-row {
    align-items: flex-start;
  }
}