:root {
  --bg: #0f1420;
  --bg-elev: #171e2e;
  --bg-elev2: #1f2838;
  --border: #2a3448;
  --text: #e6e9f0;
  --muted: #8b95ab;
  --accent: #4f8cff;
  --accent-dim: #2d4a7a;
  --danger: #ff5c6c;
  --ok: #3ecf8e;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: env(safe-area-inset-top) 16px 0;
  padding-top: calc(env(safe-area-inset-top) + 12px);
  padding-bottom: 12px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
}

.app-header h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
}

.tabbar {
  display: flex;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
}

.tab {
  flex: 1;
  padding: 12px 0;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 15px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

main {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.tab-panel {
  display: none;
  position: absolute;
  inset: 0;
  flex-direction: column;
}

.tab-panel.active {
  display: flex;
}

/* 对话页 */
.chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  max-width: 82%;
  padding: 10px 14px;
  border-radius: var(--radius);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.bot {
  align-self: flex-start;
  background: var(--bg-elev2);
  border: 1px solid var(--border);
}

.msg.user {
  align-self: flex-end;
  background: var(--accent-dim);
}

.msg.note {
  font-size: 12px;
  color: var(--muted);
  background: transparent;
  border: none;
  padding: 2px 6px;
  margin-top: -4px;
}

.chat-input {
  display: flex;
  gap: 8px;
  padding: 10px 12px calc(env(safe-area-inset-bottom) + 10px);
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
}

.chat-input input {
  flex: 1;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

.chat-input button,
.records-toolbar button,
.ghost-btn {
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}

.ghost-btn {
  background: var(--bg-elev2);
  color: var(--text);
}

.ghost-btn.danger {
  color: var(--danger);
  border-color: var(--danger);
}

/* 记录页 */
.records-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.toolbar-actions {
  display: flex;
  gap: 8px;
}

.table-wrap {
  flex: 1;
  overflow: auto;
  padding: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 8px 10px;
  border: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

th {
  background: var(--bg-elev2);
  position: sticky;
  top: 0;
}

/* 看板页 */
.dash-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.dash-controls label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.dash-controls select {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
}

.dash-result {
  flex: 1;
  overflow: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.bar-label {
  width: 100px;
  flex-shrink: 0;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bar-track {
  flex: 1;
  background: var(--bg-elev2);
  border-radius: 6px;
  height: 22px;
  position: relative;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  border-radius: 6px;
}

.bar-value {
  width: 64px;
  flex-shrink: 0;
  text-align: right;
  font-size: 13px;
  color: var(--muted);
}

/* 通用 */
.muted { color: var(--muted); font-size: 13px; }
.hidden { display: none !important; }

.chip {
  display: inline-block;
  padding: 2px 10px;
  margin: 2px;
  border-radius: 999px;
  background: var(--accent-dim);
  font-size: 13px;
  cursor: pointer;
}

/* 设置页 */
.settings-form {
  flex: 1;
  overflow: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.settings-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

.settings-form input {
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

.settings-actions {
  display: flex;
  gap: 10px;
}

.settings-actions button {
  flex: 1;
}

#set-status.ok { color: var(--ok); }
#set-status.err { color: var(--danger); }

/* 标签体系页 */
.tags-content {
  flex: 1;
  overflow: auto;
  padding: 16px;
}

.tag-section {
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.tag-section h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.cat-major {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 12px;
  margin-top: 8px;
  background: var(--bg-elev2);
}

.cat-major summary {
  cursor: pointer;
  font-size: 14px;
}

.cat-subs {
  margin-top: 8px;
}

.tag-defs {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.6;
}

.tag-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 13px;
}

.tag-table th, .tag-table td {
  padding: 6px 10px;
  border: 1px solid var(--border);
  text-align: left;
}

.tag-table th {
  background: var(--bg-elev2);
}