:root {
  --bg: #0b0f19;
  --bg-alt: #10162a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-solid: #131a2b;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8eaf2;
  --text-muted: #8b93a7;
  --accent: #7c5cff;
  --accent-2: #4fd1c5;
  --user-bubble: linear-gradient(135deg, #7c5cff, #5b8cff);
  --bot-bubble: #1a2136;
  --radius: 18px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(600px circle at 15% 10%, rgba(124, 92, 255, 0.25), transparent 60%),
    radial-gradient(500px circle at 85% 85%, rgba(79, 209, 197, 0.18), transparent 60%),
    var(--bg);
  pointer-events: none;
}

.app {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 720px;
  height: min(88vh, 860px);
  display: flex;
  flex-direction: column;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 20px;
  backdrop-filter: blur(20px);
}

.app-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.avatar {
  width: 46px;
  height: 46px;
  min-width: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  color: white;
  box-shadow: 0 4px 16px rgba(124, 92, 255, 0.4);
}

.header-text h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px #4ade80;
  display: inline-block;
}

.chat {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 4px 4px 8px;
  scroll-behavior: smooth;
}

.chat::-webkit-scrollbar {
  width: 6px;
}

.chat::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 10px;
}

.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  text-align: center;
  padding: 20px;
}

.empty-icon {
  font-size: 36px;
  margin-bottom: 4px;
}

.msg-row {
  display: flex;
  gap: 10px;
  max-width: 100%;
  animation: rise 0.25s ease;
}

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

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.msg-avatar {
  width: 30px;
  height: 30px;
  min-width: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  margin-top: 2px;
}

.msg-row.bot .msg-avatar {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
}

.msg-row.user .msg-avatar {
  background: #2a3350;
  color: var(--text-muted);
}

.msg {
  max-width: 78%;
  padding: 12px 15px;
  border-radius: var(--radius);
  line-height: 1.6;
  font-size: 14.5px;
  word-break: break-word;
}

.msg p {
  margin: 0 0 8px;
}

.msg p:last-child {
  margin-bottom: 0;
}

.msg ul, .msg ol {
  margin: 6px 0;
  padding-left: 20px;
}

.msg-row.bot .msg {
  max-width: 92%;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  background: var(--surface);
  margin: 10px 0;
}

.project-card:first-child {
  margin-top: 0;
}

.project-card:last-child {
  margin-bottom: 0;
}

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

.project-badge {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-2);
  background: rgba(79, 209, 197, 0.14);
  border-radius: 999px;
  padding: 2px 8px;
}

.project-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
}

.field {
  margin-bottom: 6px;
}

.field:last-child {
  margin-bottom: 0;
}

.field.standalone {
  margin: 6px 0;
}

.field-label {
  display: block;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 2px;
}

.field-value {
  display: block;
  font-size: 14px;
  line-height: 1.5;
}

.msg li {
  margin-bottom: 4px;
}

.msg a {
  color: var(--accent-2);
}

.msg strong {
  color: #fff;
}

.msg code {
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 5px;
  border-radius: 5px;
  font-size: 13px;
}

.msg-row.user .msg {
  background: var(--user-bubble);
  color: white;
  border-bottom-right-radius: 4px;
}

.msg-row.bot .msg {
  background: var(--bot-bubble);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.msg-row.error .msg {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

.cursor {
  display: inline-block;
  width: 7px;
  height: 15px;
  margin-left: 2px;
  background: var(--accent-2);
  vertical-align: text-bottom;
  border-radius: 1px;
  animation: blink 0.9s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.typing-dots {
  display: inline-flex;
  gap: 4px;
  padding: 4px 2px;
}

.typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: bounce 1.2s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes bounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  30% {
    transform: translateY(-5px);
    opacity: 1;
  }
}

.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 2px;
}

.chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.chip:hover {
  background: rgba(124, 92, 255, 0.15);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.chip:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.composer {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding-top: 8px;
}

.composer textarea {
  flex: 1;
  resize: none;
  max-height: 140px;
  padding: 13px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  font-size: 14.5px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s ease;
  line-height: 1.4;
}

.composer textarea:focus {
  border-color: var(--accent);
}

.composer textarea::placeholder {
  color: var(--text-muted);
}

.composer button {
  width: 46px;
  height: 46px;
  min-width: 46px;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.composer button svg {
  width: 20px;
  height: 20px;
}

.composer button:hover:not(:disabled) {
  transform: scale(1.05);
}

.composer button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 560px) {
  body {
    padding: 0;
  }
  .app {
    height: 100vh;
    border-radius: 0;
    max-width: 100%;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f3f4fb;
    --surface: rgba(0, 0, 0, 0.03);
    --surface-solid: #ffffff;
    --border: rgba(0, 0, 0, 0.08);
    --text: #14172a;
    --text-muted: #6b7280;
    --bot-bubble: #f1f2f8;
    --shadow: 0 20px 60px rgba(20, 20, 40, 0.12);
  }

  .bg-glow {
    background:
      radial-gradient(600px circle at 15% 10%, rgba(124, 92, 255, 0.12), transparent 60%),
      radial-gradient(500px circle at 85% 85%, rgba(79, 209, 197, 0.12), transparent 60%),
      var(--bg);
  }

  .msg-row.user .msg-avatar {
    background: #e5e7f5;
  }

  .msg code {
    background: rgba(0, 0, 0, 0.06);
  }

  .msg strong {
    color: #0b0f19;
  }
}