:root {
  --bg: #f3f5f8;
  --panel: #ffffff;
  --line: #e2e6ee;
  --text: #1c2330;
  --muted: #6b7385;
  --accent: #2f6fed;
  --ok: #1f9d63;
  --warn: #c98512;
  --bad: #d64545;
  --user: #e8f0ff;
  --bot: #f7f8fa;
  --input: #ffffff;
  --shadow: 0 1px 2px rgba(28, 35, 48, 0.04);
  font-family: "PingFang SC", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(900px 480px at 0% 0%, #e8eefc 0%, transparent 55%),
    radial-gradient(700px 420px at 100% 0%, #eef6f2 0%, transparent 50%),
    var(--bg);
}

.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 92%, #eef2f7);
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: start;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 12px;
}

h1 {
  margin: 0;
  font-size: 18px;
}

h2 {
  margin: 0;
  font-size: 16px;
}

.sub,
.muted,
.sidebar-meta,
.hint {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.key-box {
  display: grid;
  gap: 8px;
}

[hidden] {
  display: none !important;
}

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

.login-card {
  display: grid;
  gap: 12px;
}

.admin-body {
  min-height: 100vh;
  display: grid;
  place-items: start center;
  padding: 24px;
}

.admin-card {
  width: min(440px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.admin-shell {
  width: min(880px, 100%);
  display: grid;
  gap: 16px;
}

.admin-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 20px;
}

.admin-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 20px;
  display: grid;
  gap: 12px;
}

.admin-panel h2 {
  margin: 0;
  font-size: 15px;
}

.admin-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  align-items: end;
}

.admin-block {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.account-list {
  display: grid;
  gap: 10px;
}

.account-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.admin-label select {
  width: 100%;
  color: var(--text);
  background: var(--input);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
}

.admin-label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.admin-label input,
.admin-card input {
  width: 100%;
  color: var(--text);
  background: var(--input);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 8px;
  padding: 8px 12px;
}

.ghost {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
}

.conv-list {
  flex: 1;
  overflow: auto;
  display: grid;
  gap: 8px;
  align-content: start;
}

.conv-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px;
  align-items: stretch;
}

.conv-item {
  text-align: left;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 10px;
  padding: 10px;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.conv-del {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  border-radius: 10px;
  padding: 0 10px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
}

.conv-del:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}

.head-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.conv-item.active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: color-mix(in srgb, var(--accent) 8%, white);
}

.conv-item .t {
  font-size: 13px;
  font-weight: 600;
}

.conv-item .s {
  margin-top: 4px;
  font-size: 11px;
  color: var(--muted);
}

.chat {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

.chat-head {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
}

.primary.big {
  margin-top: 16px;
  padding: 14px 22px;
  font-size: 15px;
}

.messages {
  overflow: auto;
  padding: 20px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.empty-state {
  margin: 12vh auto 0;
  text-align: center;
  color: var(--muted);
}

.bubble {
  max-width: min(760px, 92%);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
}

.bubble.user {
  justify-self: end;
  background: var(--user);
}

.bubble.assistant {
  justify-self: start;
  background: var(--bot);
}

.bubble .role {
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 6px;
}

.bubble .text {
  white-space: pre-wrap;
  font-size: 14px;
  line-height: 1.5;
}

.bubble .stage {
  margin-top: 8px;
  font-size: 12px;
  color: var(--accent);
}

.progress-bar {
  margin-top: 8px;
  height: 7px;
  border-radius: 999px;
  background: #e8ecf3;
  overflow: hidden;
  border: 1px solid var(--line);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #1f5fe0, #4d86f5);
  transition: width 0.3s ease;
}

.thumbs {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.thumb-card {
  width: 128px;
  display: grid;
  gap: 6px;
}

.thumb-card img {
  width: 128px;
  height: 128px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}

.dl-btn,
.zip-btn {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  font-size: 12px;
  color: #fff;
  background: var(--accent);
  border-radius: 8px;
  padding: 6px 8px;
  font-weight: 600;
}

.zip-btn {
  margin-top: 8px;
}

.error {
  margin-top: 8px;
  color: var(--bad);
  font-size: 12px;
}

.composer {
  border-top: 1px solid var(--line);
  padding: 14px 20px 18px;
  background: color-mix(in srgb, var(--panel) 94%, #eef2f7);
}

textarea,
input[type="number"] {
  width: 100%;
  color: var(--text);
  background: var(--input);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  box-shadow: var(--shadow);
}

textarea:focus,
input:focus {
  outline: 1px solid var(--accent);
}

.composer-tools {
  margin-top: 10px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.file-btn,
.count-label {
  font-size: 12px;
  color: var(--muted);
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.file-btn input {
  max-width: 180px;
}

.count-label input {
  width: 72px;
}

.previews {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.previews img {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}

.primary,
.ghost {
  border-radius: 10px;
  padding: 10px 14px;
  font: inherit;
  cursor: pointer;
}

.primary {
  border: 0;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}

.primary.compact {
  padding: 8px 10px;
  font-size: 13px;
  white-space: nowrap;
}

.primary:disabled,
textarea:disabled,
input:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    max-height: 34vh;
  }
}