:root {
  --bg: #f4f5f8;
  --surface: #ffffff;
  --surface-2: #eef0f4;
  --text: #15171c;
  --muted: #5f6573;
  --border: #dcdfe6;
  --accent: #1b257e;
  --accent-text: #ffffff;
  --accent-soft: #e7e9f7;
  --danger: #b42318;
  --danger-soft: #fdecea;
  --ok: #1a7f37;
  --ok-soft: #e7f5eb;
  --warn: #7a5200;
  --warn-soft: #fff5dc;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(15, 20, 30, .06), 0 2px 10px rgba(15, 20, 30, .04);
  --topbar: 56px;
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a21;
    --surface-2: #1f232c;
    --text: #e8eaef;
    --muted: #9aa1ad;
    --border: #2c313c;
    --accent: #9aa5ff;
    --accent-text: #0f1115;
    --accent-soft: #232848;
    --danger: #ff8a80;
    --danger-soft: #3a1d1b;
    --ok: #6fdc8c;
    --ok-soft: #173322;
    --warn: #f3c969;
    --warn-soft: #362c12;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.55; }
a { color: var(--accent); }
h1 { font-size: 1.45rem; margin: 0 0 4px; }
h2 { font-size: 1.05rem; margin: 0 0 12px; }
p { margin: 0 0 8px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }
.muted { color: var(--muted); }
.empty { color: var(--muted); text-align: center; padding: 32px 0; }

/* Controls */
button, input, textarea, select { font: inherit; color: inherit; }
input[type=text], input[type=email], input[type=password], input:not([type]), textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface);
}
input:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
label { display: grid; gap: 4px; font-size: .9rem; color: var(--muted); }
label.check { display: flex; align-items: center; gap: 6px; }
button { cursor: pointer; border: 1px solid var(--border); background: var(--surface); border-radius: 8px; padding: 8px 14px; }
button:hover { background: var(--surface-2); }
button:disabled { opacity: .6; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.primary:hover { filter: brightness(1.08); }
button.small { padding: 3px 10px; font-size: .85rem; }
button.link { border: 0; background: none; padding: 0; color: var(--accent); text-decoration: underline; }

/* Layout */
.topbar {
  position: sticky; top: 0; z-index: 10; height: var(--topbar); display: flex; align-items: center; gap: 24px;
  padding: 0 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 800; letter-spacing: .08em; text-decoration: none; color: var(--text); }
.nav { display: flex; gap: 16px; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--text); }
.who { margin-left: auto; display: flex; align-items: center; gap: 12px; color: var(--muted); }
.who form { margin: 0; }
main.page { max-width: 1120px; margin: 0 auto; padding: 24px 20px 48px; }
main.auth { min-height: calc(100dvh - var(--topbar)); display: grid; place-items: center; padding: 24px 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px; }
.auth-card { width: min(420px, 100%); display: grid; gap: 14px; }
.page-head { margin-bottom: 16px; }
.flash { border-radius: var(--radius); padding: 12px 16px; margin: 0 auto 16px; max-width: 1120px; border: 1px solid var(--border); }
.flash p:last-child { margin-bottom: 0; }
.flash.ok { background: var(--ok-soft); }
.flash.error { background: var(--danger-soft); color: var(--danger); }
.flash.secret { background: var(--warn-soft); }
.flash .secret code { font-size: 1.1rem; padding: 2px 8px; border-radius: 6px; background: var(--surface); }
.error { color: var(--danger); }
.notice { background: var(--warn-soft); color: var(--warn); padding: 8px 12px; border-radius: 8px; }

/* Tables and forms */
.table-wrap { overflow-x: auto; }
table.list { width: 100%; border-collapse: collapse; background: var(--surface); }
table.list th, table.list td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
table.list th { font-size: .85rem; color: var(--muted); font-weight: 600; }
table.list tr.inactive td { color: var(--muted); }
table.numbers td:nth-child(n+2) { text-align: right; font-variant-numeric: tabular-nums; }
table.numbers.usage td:nth-child(-n+3) { text-align: left; }
.team-form { display: flex; gap: 6px; align-items: center; margin: 0; }
select { font: inherit; color: inherit; padding: 7px 8px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
td.actions { display: flex; gap: 6px; justify-content: flex-end; }
td.actions form { margin: 0; }
.new-campaign .fields { display: grid; grid-template-columns: 2fr 1fr 2fr; gap: 12px; margin-bottom: 12px; }
.new-campaign .fields.with-team { grid-template-columns: 1fr 2fr 1fr 2fr; }
.inline-form { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; margin-bottom: 8px; }
.inline-form label:not(.check) { min-width: 200px; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; }
.badge.running { background: var(--accent-soft); color: var(--accent); }
.badge.queued { background: var(--warn-soft); color: var(--warn); }
.badge.team { background: var(--surface-2); color: var(--text); }
.status-grid { display: grid; grid-template-columns: max-content 1fr; gap: 6px 20px; margin: 0; }
.status-grid dt { color: var(--muted); }
.status-grid dd { margin: 0; }

/* Campaign workspace */
main.campaign {
  display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 16px; padding: 16px;
  height: calc(100dvh - var(--topbar));
}
main.campaign > .flash { grid-column: 1 / -1; margin: 0; }
.chat { display: flex; flex-direction: column; min-height: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.campaign-head { padding: 14px 18px 10px; border-bottom: 1px solid var(--border); }
.campaign-head .back { font-size: .85rem; text-decoration: none; }
.campaign-head p { margin: 0; font-size: .9rem; }
.messages { flex: 1; min-height: 0; overflow-y: auto; list-style: none; margin: 0; padding: 16px 18px; display: flex; flex-direction: column; gap: 12px; }
.message { max-width: min(880px, 100%); padding: 10px 14px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.message.user { align-self: flex-end; background: var(--accent-soft); border-color: transparent; max-width: min(720px, 90%); }
.message.assistant { background: var(--surface-2); border-color: transparent; }
.message.system { background: var(--warn-soft); border-color: transparent; font-size: .92rem; }
.message-head { font-size: .8rem; color: var(--muted); margin-bottom: 4px; }
.message-head .author { font-weight: 700; color: var(--text); }
.message .body { overflow-wrap: anywhere; }
.message .body > :last-child { margin-bottom: 0; }
.message .body pre { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; padding-right: 64px; white-space: pre-wrap; word-break: break-word; font-size: .85rem; }
.message .body pre button.copy { position: absolute; top: 6px; right: 6px; }
.message .body table { border-collapse: collapse; margin: 8px 0; }
.message .body th, .message .body td { border: 1px solid var(--border); padding: 4px 8px; }
.message .body ul, .message .body ol { padding-left: 1.3em; margin: 0 0 8px; }
.attachments { list-style: none; padding: 0; margin: 6px 0 0; display: flex; flex-wrap: wrap; gap: 6px; font-size: .85rem; }
.attachments li { background: var(--surface); border-radius: 6px; padding: 1px 8px; }
.status { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 8px 18px; border-top: 1px solid var(--border); background: var(--accent-soft); font-size: .9rem; }
.status .waiting, .status .elapsed { color: var(--muted); }
.spinner { width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--accent); border-right-color: transparent; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.composer { display: grid; gap: 8px; padding: 12px 18px 14px; border-top: 1px solid var(--border); }
.composer textarea { resize: vertical; min-height: 96px; }
.stages { display: flex; flex-wrap: wrap; gap: 6px; }
.stage { border-radius: 999px; padding: 4px 12px; font-size: .85rem; }
.composer-row { display: flex; align-items: center; gap: 12px; }
.attach { display: inline-flex; flex-direction: row; align-items: center; cursor: pointer; border: 1px dashed var(--border); border-radius: 8px; padding: 7px 12px; color: var(--text); }
.attach input { display: none; }
.picked { flex: 1; min-width: 0; color: var(--muted); font-size: .85rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.composer-row .primary { margin-left: auto; }
.hint { font-size: .8rem; color: var(--muted); margin: 0; }
.files { min-height: 0; overflow-y: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px 16px; }
.files h2 { font-size: .95rem; margin: 6px 0 10px; }
.file-list { list-style: none; padding: 0; margin: 0 0 18px; display: grid; gap: 10px; }
.file-list .empty { padding: 4px 0; text-align: left; font-size: .85rem; }
.file { display: grid; gap: 4px; font-size: .85rem; }
.file .thumb img { display: block; width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--border); background: var(--surface-2); }
.file-meta { display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: baseline; }
.file-name { overflow-wrap: anywhere; }

@media (max-width: 900px) {
  .topbar { gap: 14px; padding: 0 14px; }
  .who span { display: none; }
  main.campaign { grid-template-columns: 1fr; height: auto; padding: 12px; }
  .messages { max-height: 62vh; }
  .new-campaign .fields, .new-campaign .fields.with-team { grid-template-columns: 1fr; }
}