:root {
  --bg: #f7f9fc;
  --surface: #fff;
  --line: #e5e7eb;
  --text: #111827;
  --muted: #64748b;
  --primary: #635bff;
  --primary-dark: #4f46e5;
  --ok: #047857;
}

* { box-sizing: border-box; }
html, body { width: 100%; max-width: 100%; overflow-x: hidden; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Noto Sans KR", system-ui, sans-serif;
  letter-spacing: 0;
}

.cs-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 44px;
}

.chat-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.intro-panel,
.chat-panel,
.panel,
.detail-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, .05);
}

.intro-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 28px; line-height: 1.22; }
h2 { margin-bottom: 0; font-size: 18px; }
.intro-panel p, .flow-box span, .direct-as-helper span, #chatStatus { color: var(--muted); }

.flow-box,
.direct-as-helper {
  display: grid;
  gap: 5px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.direct-as-helper a {
  width: fit-content;
  color: var(--primary);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.direct-as-helper a:hover { text-decoration: underline; }

.chat-panel {
  min-height: 680px;
  display: grid;
  grid-template-rows: auto minmax(320px, 1fr) auto auto auto;
  overflow: hidden;
}

.chat-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.chat-head span { display: block; margin-top: 4px; font-size: 13px; }

.chat-messages {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 18px;
  overflow-y: auto;
  background: linear-gradient(#fff, #fbfdff);
}

.chat-message {
  display: flex;
  width: 100%;
}

.chat-message.user { justify-content: flex-end; }
.chat-message.bot { justify-content: flex-start; }

.bubble {
  max-width: min(78%, 620px);
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.chat-message.user .bubble {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.chat-quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 18px 0;
}

button,
.chat-quick-actions button {
  min-height: 38px;
  border: 1px solid #d9e1ec;
  border-radius: 6px;
  background: #fff;
  color: #334155;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.chat-quick-actions button {
  padding: 0 12px;
}

button.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

button.primary:hover { background: var(--primary-dark); }
.ghost-button { padding: 0 12px; }

.chat-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 86px;
  gap: 8px;
  padding: 12px 18px 18px;
}

input, select, textarea {
  width: 100%;
  min-width: 0;
  min-height: 40px;
  border: 1px solid #d9e1ec;
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  padding: 9px 10px;
}

.detail-panel {
  margin: 0 18px 18px;
  padding: 0;
}

.detail-panel summary {
  padding: 13px 14px;
  color: #334155;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 0 14px 14px;
}

label {
  display: grid;
  gap: 6px;
  color: #374151;
  font-size: 13px;
  font-weight: 800;
}

.wide-label,
.result-box {
  grid-column: 1 / -1;
}

.result-box {
  padding: 12px;
  border: 1px dashed #cbd5e1;
  border-radius: 8px;
  background: #f8fafc;
  color: #475569;
  font-size: 13px;
}

.panel {
  margin-top: 14px;
  padding: 18px;
}

.hidden { display: none !important; }

.complete {
  border-color: #bbf7d0;
  background: #f0fdf4;
}

.complete h2 { color: var(--ok); }
.complete dl { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 8px; }
.complete dt { color: var(--muted); font-weight: 800; }
.complete dd { margin: 0; overflow-wrap: anywhere; }

@media (max-width: 820px) {
  .cs-shell { width: min(100% - 20px, 1120px); padding-top: 10px; }
  .chat-layout { grid-template-columns: 1fr; gap: 10px; }
  .intro-panel { padding: 14px; }
  .intro-panel p { margin-bottom: 0; }
  h1 { font-size: 22px; }
  .chat-panel { min-height: calc(100vh - 210px); grid-template-rows: auto minmax(280px, 1fr) auto auto auto; }
  .chat-head, .chat-messages, .chat-quick-actions, .chat-input-row { padding-left: 12px; padding-right: 12px; }
  .chat-quick-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chat-quick-actions button { width: 100%; padding: 0 8px; }
  .bubble { max-width: 88%; }
  .detail-grid { grid-template-columns: 1fr; }
  .complete dl { grid-template-columns: 1fr; }
}