/* ===== Global ===== */
:root {
  --bg: #f5f6fa;
  --panel: #ffffff;
  --card: #ffffff;
  --text: #333333;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-600: #1e40af;
  --border: #e5e7eb;
  --green-bg: #d1e7dd;
  --green-text: #0f5132;
  --green-border: #badbcc;
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell,
    "Helvetica Neue", Arial, "Noto Sans";
}
.muted {
  color: var(--muted);
}

.app {
  height: 100vh;
}

/* ===== Login ===== */
.login {
  display: grid;
  place-items: center;
  height: 100%;
  padding: 24px;
}
.login-card {
  width: 360px;
  max-width: 92vw;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 20px 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}
.login-card h1 {
  margin: 0 0 6px;
}
.field {
  display: grid;
  gap: 6px;
  margin: 10px 0;
}
.field input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fbfbfd;
  color: var(--text);
  outline: none;
}
.error {
  color: #b4232a;
  margin-top: 8px;
}

/* ===== Layout ===== */
.chat-layout {
  display: grid;
  grid-template-columns: 320px 1fr; /* sidebar on the LEFT, chat on the RIGHT */
  height: 100%;
}

/* ===== Sidebar (Conversations) ===== */
#history-panel {
  background: var(--panel);
  border-right: 1px solid var(--border); /* was border-left */
  display: grid;
  grid-template-rows: auto auto 1fr;
}

.right-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.right-head h2 {
  margin: 0;
  font-size: 16px;
}
.right-actions {
  display: flex;
  gap: 8px;
}

.tools {
  display: flex;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  background: #fafafa;
}
.tools input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
}

#conversations-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: auto;
}
#conversations-list li {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  background: #fff;
}
#conversations-list li:hover {
  background: #f7f7fb;
}
#conversations-list li.active {
  background: #eef2ff;
}
#conversations-list .conv-title {
  font-weight: 600;
}
#conversations-list .conv-meta {
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
#conversations-list .conv-meta .id {
  color: #9aa0a6;
}

/* ===== Chat ===== */
#chat-panel {
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: #fafafa;
}

.chat-head {
  padding: 12px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.chat-head .title {
  display: flex;
  gap: 10px;
  align-items: center;
}
.chat-head .actions {
  display: flex;
  gap: 8px;
}

.messages {
  padding: 20px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  margin-bottom: 2px;
  padding: 12px 14px;
  border-radius: 12px;
  max-width: 75%;
  line-height: 1.5;
  font-size: 14px;
  white-space: pre-wrap;
  word-wrap: break-word;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.03);
}

.user-message {
  background: var(--green-bg);
  color: var(--green-text);
  border: 1px solid var(--green-border);
  align-self: flex-end;
}
.assistant-message {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  align-self: flex-start;
}

/* Markdown content tweaks */
.messages .content h1,
.messages .content h2,
.messages .content h3,
.messages .content h4,
.messages .content h5,
.messages .content h6 {
  margin: 8px 0 6px;
  line-height: 1.2;
}
.messages .content ul,
.messages .content ol {
  margin: 6px 0 6px 24px;
}
.messages .content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono",
    monospace;
  font-size: 0.95em;
  padding: 2px 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #f4f6fb;
}
.messages .content pre code {
  display: block;
  padding: 10px;
  overflow: auto;
}

/* ===== Composer ===== */
#input-area {
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  padding: 12px;
}
#user-input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  background: #fff;
  color: var(--text);
}

/* ===== Buttons ===== */
.btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
}
.btn:hover {
  background: #f7f7fb;
}
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn.primary:hover {
  background: var(--accent-600);
  border-color: var(--accent-600);
}
.btn.ghost {
  background: #fff;
  color: var(--text);
}
.btn.wide {
  width: 100%;
}