:root {
  --bg: #f7f7f5;
  --panel: #ececea;
  --text: #1e1e1e;
  --muted: #6b6b6b;
  --accent: #c15f3c;
  --bubble-user: #e3e0d8;
  --bubble-ai: #ffffff;
  --border: #d8d6d0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f1e1c;
    --panel: #171614;
    --text: #e8e6e1;
    --muted: #9a988f;
    --accent: #d97a53;
    --bubble-user: #33312c;
    --bubble-ai: #262522;
    --border: #3a3833;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  display: flex;
  height: 100dvh;
  font-family:
    -apple-system, "Pretendard", "Apple SD Gothic Neo", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

#sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 12px;
  gap: 8px;
}

#new-chat {
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
}

#new-chat:hover {
  border-color: var(--accent);
}

#session-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

#session-list button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 4px;
  padding: 8px 10px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  text-align: left;
}

#session-list button.active,
#session-list button:hover {
  background: var(--bubble-user);
  color: var(--text);
}

#session-list .title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#session-list .del {
  visibility: hidden;
  color: var(--muted);
}

#session-list button:hover .del {
  visibility: visible;
}

#toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}

#context {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

#context + #settings-btn {
  margin-left: 8px;
}

.usage {
  padding: 8px 10px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.login-error {
  margin: 8px 0 0;
  font-size: 13px;
  color: #c0392b;
  min-height: 1em;
}

#model-select,
#effort-select,
#settings-btn {
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
}

#web-search-label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
}

#chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

#messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.msg {
  max-width: 760px;
  width: fit-content;
  padding: 12px 16px;
  border-radius: 12px;
  line-height: 1.6;
  font-size: 15px;
  overflow-wrap: break-word;
}

.msg.user {
  align-self: flex-end;
  background: var(--bubble-user);
  white-space: pre-wrap;
}

.msg.assistant {
  align-self: flex-start;
  background: var(--bubble-ai);
  border: 1px solid var(--border);
}

.msg.assistant pre {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  overflow-x: auto;
  font-size: 13px;
}

.msg.assistant code {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 0.9em;
}

.msg.error {
  align-self: center;
  color: #c0392b;
  background: transparent;
  font-size: 13px;
}

#attachments {
  display: flex;
  gap: 8px;
  padding: 0 24px;
}

#attachments .chip {
  position: relative;
  margin-top: 8px;
}

#attachments .chip img {
  height: 56px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: block;
}

#attachments .chip button {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 18px;
  height: 18px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  line-height: 18px;
  cursor: pointer;
}

.msg img.thumb {
  max-width: 240px;
  max-height: 180px;
  border-radius: 8px;
  display: block;
  margin-bottom: 8px;
}

#attach {
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  font-size: 16px;
  cursor: pointer;
}

#composer {
  display: flex;
  gap: 8px;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--border);
}

#input {
  flex: 1;
  resize: none;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bubble-ai);
  color: var(--text);
  font: inherit;
  font-size: 15px;
  max-height: 200px;
}

#input:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}

#send {
  padding: 0 20px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}

#send:disabled {
  opacity: 0.5;
  cursor: default;
}

dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  padding: 24px;
  width: min(400px, 90vw);
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.4);
}

dialog label {
  display: block;
  margin: 12px 0;
  font-size: 13px;
  color: var(--muted);
}

dialog input {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bubble-ai);
  color: var(--text);
  font-size: 14px;
}

dialog menu {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 0;
  margin: 16px 0 0;
}

dialog button {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

#cfg-save {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

@media (max-width: 700px) {
  #sidebar {
    display: none;
  }
}