* {
  box-sizing: border-box;
}

body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  background: #f3f3f3;
  color: #222;
  font-family: Arial, sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chat {
  width: calc(100vw - 24px);
  height: calc(100vh - 24px);
  margin: 12px;
  display: grid;
  grid-template-columns: 260px 1fr;
  background: white;
  border: 1px solid #ddd;
}

.sidebar {
  display: grid;
  grid-template-rows: auto 1fr;
  border-right: 1px solid #ddd;
  min-height: 0;
}

.topbar {
  padding: 16px;
  border-bottom: 1px solid #ddd;
}

.topbar h1 {
  margin: 0;
  font-size: 22px;
}

.topbar p {
  margin: 6px 0 10px;
  color: #666;
  font-size: 14px;
}

.status {
  display: inline-block;
  padding: 4px 8px;
  background: #e7f6ea;
  color: #276537;
  font-size: 12px;
}

.nearby {
  padding: 14px;
  overflow: auto;
}

.nearby-title h2 {
  margin: 0;
  font-size: 16px;
}

.nearby-title p {
  margin: 4px 0 12px;
  color: #777;
  font-size: 13px;
}

.user-list {
  display: grid;
  gap: 8px;
}

.user-card {
  padding: 10px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  background: #f7f7f7;
  border: 1px solid #e1e1e1;
}

.user-card.me {
  background: #eaf8ef;
}

.user-card > div {
  flex: 1;
  min-width: 0;
}

.user-card strong {
  font-size: 14px;
}

.user-card small {
  color: #278345;
  font-size: 12px;
}

.edit-name {
  display: grid;
  gap: 4px;
}

.edit-name input {
  width: 100%;
  height: 30px;
  padding: 0 7px;
  border: 1px solid #bcd9c5;
}

.edit-name span {
  min-height: 14px;
  color: #b33119;
  font-size: 12px;
}

.main-area {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 0;
  overflow: hidden;
}

.chat-head {
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid #ddd;
}

.chat-head h2,
.chat-head p {
  margin: 0;
}

.chat-head p {
  margin-top: 4px;
  color: #777;
  font-size: 13px;
}

#clearButton {
  width: 36px;
  height: 36px;
  border: 0;
  display: grid;
  place-items: center;
  background: #eeeeee;
  color: #555;
  cursor: pointer;
}

.conversation {
  min-height: 0;
  overflow-y: auto;
  padding: 18px;
}

.empty {
  height: 100%;
  display: grid;
  place-content: center;
  text-align: center;
  color: #777;
}

.empty h2,
.empty p {
  margin: 0;
}

.empty.hidden {
  display: none;
}

.messages {
  display: none;
  flex-direction: column;
  gap: 10px;
}

.messages.active {
  display: flex;
}

.message {
  max-width: 60%;
  padding: 9px 11px;
  word-break: break-word;
  border-radius: 10px;
}

.message.mine {
  align-self: flex-end;
  background: #2f7cf6;
  color: white;
}

.message.other {
  align-self: flex-start;
  background: #eeeeee;
}

.message strong {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
}

.message p {
  margin: 0;
  font-size: 14px;
  white-space: pre-wrap;
}

.text-line {
  display: flex;
  align-items: start;
  gap: 8px;
}

.icon-button {
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  display: grid;
  place-items: center;
  color: inherit;
  background: rgba(0, 0, 0, 0.12);
  cursor: pointer;
}

.icon-button.clicked,
.composer button.clicked {
  background: #278345;
}

.composer button:active,
.icon-button:active {
  transform: scale(0.95);
}

.copy-button svg {
  width: 14px;
  height: 14px;
}

.chat-image {
  display: block;
  max-width: 260px;
  max-height: 220px;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.image-line {
  display: flex;
  align-items: start;
  gap: 8px;
}

.composer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid #ddd;
}

.image-preview {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.image-preview.hidden {
  display: none;
}

.preview-item {
  width: 74px;
  height: 62px;
  position: relative;
  border: 1px solid #ddd;
  background: #fafafa;
}

.preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-item button {
  width: 16px;
  height: 16px;
  padding: 0;
  position: absolute;
  top: 3px;
  right: 3px;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.65);
  color: white;
}

.preview-item svg {
  width: 10px;
  height: 10px;
}

.composer textarea {
  min-height: 42px;
  max-height: 130px;
  padding: 10px;
  resize: none;
  overflow-y: auto;
  border: 1px solid #ddd;
}

.composer button {
  min-width: 42px;
  height: 42px;
  padding: 0 12px;
  border: 0;
  background: #2f7cf6;
  color: white;
  cursor: pointer;
}

#fileButton {
  background: #666;
}

.composer .preview-item button {
  min-width: 0;
  width: 16px;
  height: 16px;
  padding: 0;
  top: 3px;
  right: 3px;
  background: rgba(0, 0, 0, 0.65);
  border-radius: 50%;
}

@media (max-width: 560px) {
  .chat {
    width: 100vw;
    height: 100vh;
    margin: 0;
    grid-template-columns: 1fr;
    grid-template-rows: 190px 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid #ddd;
  }

  .chat-head {
    display: none;
  }
}