@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #f7fafd;
  --muted: #ebf2fa;
  --card: #ffffff;
  --fg: #0d1f35;
  --muted-fg: #5a7a9a;
  --border: #d6e4f0;
  --accent-border: rgba(20, 120, 200, 0.25);
  --accent: #1478c8;
  --accent-2: #2878dc;
  --accent-light: rgba(20, 120, 200, 0.08);
  --shadow-sm: 0 1px 3px rgba(20, 80, 160, 0.07);
  --shadow-md: 0 4px 16px rgba(20, 80, 160, 0.1);
  --shadow-lg: 0 12px 40px rgba(20, 80, 160, 0.14);
  --shadow-accent: 0 6px 24px rgba(20, 120, 200, 0.28);
  --radius: 16px;
  --success: #0f9f76;
  --error: #d34747;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", sans-serif;
  line-height: 1.6;
}

body {
  position: relative;
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 10% 20%, rgba(20, 120, 200, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 60% at 90% 80%, rgba(40, 120, 220, 0.05) 0%, transparent 55%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(20, 120, 200, 0.12) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.36;
}

.deco-ring {
  position: fixed;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: 1px dashed rgba(20, 120, 200, 0.18);
  pointer-events: none;
  z-index: 0;
}

.deco-ring-1 {
  width: 480px;
  height: 480px;
  margin-left: -240px;
  margin-top: -240px;
  animation: rotate-cw 80s linear infinite;
}

.deco-ring-2 {
  width: 700px;
  height: 700px;
  margin-left: -350px;
  margin-top: -350px;
  animation: rotate-ccw 120s linear infinite;
}

.page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  gap: 8px;
  padding: 8px 10px 10px;
}

.assistant-panel {
  width: min(98vw, 1800px);
  max-width: 1800px;
  height: min(calc(100vh - 44px), 1280px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* ── Header ── */

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #ffffff 0%, #f9fcff 100%);
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.panel-title h2 {
  margin: 0;
  font-size: 1.06rem;
}

.signature {
  margin: 2px 0 0;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--muted-fg);
  text-transform: uppercase;
}

.icon-box {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow-accent);
}

.icon-box svg {
  width: 20px;
  height: 20px;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.model-pill {
  border: 1px solid var(--accent-border);
  border-radius: 99px;
  padding: 4px 10px;
  background: var(--accent-light);
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  cursor: pointer;
  user-select: none;
  transition: opacity 0.15s;
}
.model-pill:hover {
  opacity: 0.75;
}
.model-pill:active {
  opacity: 0.55;
}

.action-btn {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 12px;
  background: #ffffff;
  color: var(--muted-fg);
  text-decoration: none !important;
  font-size: 12px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:link,
.action-btn:visited,
.action-btn:hover,
.action-btn:active {
  text-decoration: none !important;
}

.action-btn:hover,
.action-btn:focus-visible {
  color: var(--accent);
  border-color: var(--accent-border);
  box-shadow: var(--shadow-sm);
  outline: none;
}

.hidden {
  display: none !important;
}

/* ── Messages ── */

.messages {
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.messages::-webkit-scrollbar {
  width: 7px;
}

.messages::-webkit-scrollbar-thumb {
  background: #c6d8ea;
  border-radius: 8px;
}

.msg {
  display: flex;
  gap: 10px;
  animation: fade-up 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.msg.user {
  flex-direction: row-reverse;
}

.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
}

.msg.user .avatar {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #ffffff;
}

.msg.ai .avatar {
  background: var(--muted);
  border: 1px solid var(--border);
  color: var(--accent);
}

.bubble {
  max-width: min(90%, 1240px);
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 11px 15px;
  box-shadow: var(--shadow-sm);
  word-break: break-word;
  overflow: hidden;
}

.msg.user .bubble {
  background: linear-gradient(135deg, rgba(20, 120, 200, 0.14), rgba(40, 120, 220, 0.08));
  border-color: var(--accent-border);
  border-bottom-right-radius: 5px;
}

.msg.ai .bubble {
  background: #ffffff;
  border-bottom-left-radius: 5px;
}

/* ── Markdown ── */

.bubble h1, .bubble h2, .bubble h3,
.bubble h4, .bubble h5, .bubble h6 {
  margin: 0.95em 0 0.45em;
  line-height: 1.32;
}

.bubble p { margin: 0.55em 0; }
.bubble p:first-child { margin-top: 0; }
.bubble p:last-child  { margin-bottom: 0; }
.bubble ul, .bubble ol { padding-left: 1.3em; }

.bubble code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.88em;
  background: #eff5fb;
  border-radius: 4px;
  padding: 0.15em 0.45em;
  color: #0f3f6b;
}

.bubble pre {
  margin: 0.75em 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.bubble pre code {
  display: block;
  background: #f8fbff !important;
  color: #142940;
  padding: 14px 16px !important;
  line-height: 1.55;
  overflow-x: auto;
}

.code-wrap { position: relative; }

.code-lang {
  position: absolute;
  top: 0; right: 0;
  padding: 4px 10px;
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-bottom-left-radius: 8px;
  font-size: 11px;
  color: var(--muted-fg);
  font-family: "JetBrains Mono", monospace;
  background: #f4f9ff;
}

.copy-btn {
  position: absolute;
  top: 4px; right: 62px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: #ffffff;
  color: var(--muted-fg);
  font-size: 11px;
  padding: 2px 8px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.code-wrap:hover .copy-btn,
.copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--accent); }

.bubble blockquote {
  margin: 0.65em 0;
  padding: 0.3em 0.8em;
  border-left: 3px solid var(--accent);
  border-radius: 0 5px 5px 0;
  background: var(--muted);
  color: var(--muted-fg);
}

.table-wrap {
  overflow-x: auto;
  margin: 0.65em 0;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.bubble table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  font-size: 0.93em;
}

.bubble th, .bubble td {
  border: 1px solid var(--border);
  padding: 7px 10px;
  word-break: break-word;
}

.bubble th { background: var(--muted); }
.bubble a  { color: var(--accent); }

.bubble hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0.8em 0;
}

/* ── Error Card ── */

.error-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.error-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.error-badge {
  background: rgba(211, 71, 71, 0.10);
  color: var(--error);
  border: 1px solid rgba(211, 71, 71, 0.28);
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 11px;
  font-family: "JetBrains Mono", monospace;
  font-weight: 600;
  flex-shrink: 0;
}

.error-time {
  flex: 1;
  font-size: 11px;
  color: var(--muted-fg);
  font-family: "JetBrains Mono", monospace;
}

.error-copy-btn {
  border: 1px solid var(--border);
  border-radius: 5px;
  background: transparent;
  color: var(--muted-fg);
  font-size: 11px;
  padding: 2px 8px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
  flex-shrink: 0;
}

.error-copy-btn:hover {
  color: var(--error);
  border-color: rgba(211, 71, 71, 0.35);
}

.error-message {
  color: var(--error);
  font-size: 13.5px;
  line-height: 1.5;
}

.error-detail {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--muted-fg);
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  word-break: break-all;
}

.tool-status {
  margin-top: 8px;
  padding: 5px 10px;
  border-radius: 6px;
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-size: 12px;
  font-family: "JetBrains Mono", monospace;
  animation: pulse-opacity 1.2s ease-in-out infinite;
}

@keyframes pulse-opacity {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

.cursor-blink::after {
  content: "▍";
  color: var(--accent);
  margin-left: 2px;
  animation: blink 0.7s step-end infinite;
}

/* ── Empty hint ── */

.empty-hint {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--muted-fg);
  gap: 12px;
}

.empty-icon {
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent-border);
  border-radius: 14px;
  color: var(--accent);
  background: var(--accent-light);
}

.empty-icon svg { width: 30px; height: 30px; }

.suggestions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.suggestion-btn {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #ffffff;
  color: var(--muted-fg);
  font-size: 12px;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.suggestion-btn:hover,
.suggestion-btn:focus-visible {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-light);
  outline: none;
}

/* ── Input ── */

.input-area {
  padding: 10px 16px 11px;
  border-top: 1px solid var(--border);
  background: #ffffff;
}

.input-wrap {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fdfefe;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 8px 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-wrap:focus-within {
  border-color: var(--accent-border);
  box-shadow: 0 0 0 3px rgba(20, 120, 200, 0.1);
}

#userInput {
  flex: 1;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--fg);
  font-family: "Inter", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  min-height: 24px;
  max-height: 220px;
}

#userInput::placeholder { color: var(--muted-fg); }

.send-btn,
.stop-btn {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.send-btn {
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.send-btn:hover:not(:disabled),
.send-btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
  outline: none;
}

.send-btn:disabled {
  background: #b6c6d6;
  cursor: not-allowed;
}

.stop-btn {
  color: #ffffff;
  background: var(--error);
  display: none;
}

.stop-btn:hover,
.stop-btn:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(211, 71, 71, 0.28);
  outline: none;
}

.send-btn svg,
.stop-btn svg {
  width: 16px;
  height: 16px;
}

.input-hint {
  margin: 6px 0 0;
  text-align: center;
  color: var(--muted-fg);
  font-size: 10px;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.08em;
}

/* ── Footer ── */

.page-footer {
  margin-top: 2px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted-fg);
  opacity: 0.56;
}

/* ── Animations ── */

.fade-up {
  animation: fade-up 0.7s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.fade-delay-0 { animation-delay: 0s; }
.fade-delay-1 { animation-delay: 0.1s; }
.fade-delay-2 { animation-delay: 0.2s; }
.fade-delay-3 { animation-delay: 0.35s; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes rotate-cw {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes rotate-ccw {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}

/* ── Responsive ── */

@media (max-width: 920px) {
  .assistant-panel {
    width: 100%;
    max-width: 100%;
    height: min(calc(100vh - 28px), 1040px);
  }

  .panel-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .page {
    padding: 10px 12px 14px;
    gap: 10px;
  }

  .assistant-panel {
    width: 100%;
    max-width: 100%;
    height: min(calc(100vh - 24px), 94vh);
    border-radius: 14px;
  }

  .panel-actions { width: 100%; flex-wrap: wrap; }

  .bubble { max-width: 86%; }
}

@media (prefers-reduced-motion: reduce) {
  .deco-ring { animation: none; }
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}