:root {
  color-scheme: light;
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #18202f;
  --muted: #687282;
  --line: #dce1e8;
  --accent: #186b63;
  --accent-dark: #0f524c;
  --warn: #8f4f15;
  --soft: #eef7f5;
  --shadow: 0 12px 28px rgba(25, 31, 45, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  min-height: 38px;
  padding: 0 14px;
}

button:hover {
  background: var(--accent-dark);
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  outline: none;
}

input,
select {
  height: 38px;
  padding: 0 12px;
}

textarea {
  resize: none;
  padding: 10px 12px;
}

.hidden {
  display: none !important;
}

.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(560px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 32px;
}

.login-panel h1,
.topbar h1 {
  margin: 4px 0 0;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.login-form {
  display: flex;
  gap: 10px;
  margin-top: 28px;
}

.login-form input {
  flex: 1;
}

.app-view {
  min-height: 100vh;
  padding: 20px;
}

.topbar,
.stats-grid,
.workspace {
  width: min(1520px, 100%);
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.user-chip span {
  color: var(--ink);
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.stat-card,
.sidebar,
.records-panel,
.chat-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.stat-card {
  padding: 16px;
}

.stat-card p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
}

.stat-card strong {
  font-size: 28px;
  letter-spacing: 0;
}

.workspace {
  display: grid;
  grid-template-columns: 280px minmax(380px, 1fr) minmax(420px, 0.95fr);
  gap: 14px;
  height: clamp(500px, calc(100vh - 190px), 720px);
  min-height: 0;
}

.sidebar,
.records-panel,
.chat-panel {
  min-height: 0;
}

.sidebar {
  padding: 14px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.sidebar .panel-head {
  padding: 0 0 12px;
}

.panel-head h2,
.upload-box h2 {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0;
}

.filters {
  display: flex;
  gap: 8px;
}

.days-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.day-button {
  width: 100%;
  min-height: 58px;
  padding: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  text-align: left;
}

.day-button.active {
  background: var(--soft);
  border-color: #9fcfc8;
}

.day-button strong,
.day-button span {
  display: block;
}

.day-button span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.upload-box {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.upload-box input {
  width: 100%;
  margin-top: 10px;
  padding: 7px 8px;
}

.upload-box p {
  min-height: 20px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.records-panel,
.chat-panel {
  display: flex;
  flex-direction: column;
}

.records-list,
.chat-list {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 14px;
}

.record-item {
  display: grid;
  grid-template-columns: 92px 86px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.record-time,
.record-speaker {
  color: var(--muted);
  font-size: 13px;
}

.record-speaker {
  color: var(--accent-dark);
  font-weight: 700;
}

.record-text {
  line-height: 1.65;
}

.chat-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message {
  max-width: 92%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  line-height: 1.6;
  white-space: pre-wrap;
}

.message.user {
  align-self: flex-end;
  background: #eef3ff;
}

.message.ai {
  align-self: flex-start;
  background: var(--soft);
}

.message-meta {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.chat-form {
  display: grid;
  grid-template-columns: 1fr 82px;
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--line);
}

#chatHint {
  color: var(--muted);
  font-size: 12px;
}

.empty,
.error {
  color: var(--muted);
  padding: 20px;
  text-align: center;
}

.error {
  color: var(--warn);
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 240px 1fr;
    height: auto;
  }

  .chat-panel {
    grid-column: 1 / -1;
    height: clamp(420px, 56vh, 560px);
    min-height: 0;
  }
}

@media (max-width: 760px) {
  .app-view {
    padding: 12px;
  }

  .topbar,
  .login-form,
  .filters {
    align-items: stretch;
    flex-direction: column;
  }

  .stats-grid,
  .workspace {
    grid-template-columns: 1fr;
  }

  .chat-panel {
    order: -1;
  }

  .chat-panel {
    height: clamp(380px, 58vh, 520px);
  }

  .record-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .chat-form {
    grid-template-columns: 1fr;
  }
}