:root {
  color-scheme: dark;
  --bg: #090909;
  --panel: #111111;
  --panel-alt: #171717;
  --panel-soft: #1e1e1e;
  --line: #2b2b2b;
  --text: #f4f4f4;
  --muted: #a1a1a1;
  --accent: #ffffff;
  --user: #eaeaea;
  --assistant: #151515;
  --error: #ffb4b4;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.08), transparent 28%),
    linear-gradient(180deg, #050505 0%, #090909 100%);
  color: var(--text);
  font-family: "Noto Sans Arabic", "Noto Sans", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 28px;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.topbar h1 {
  margin: 0;
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.control-panel,
.status-strip,
.composer,
.chat-feed {
  border: 1px solid var(--line);
  background: rgba(17, 17, 17, 0.92);
  backdrop-filter: blur(12px);
}

.control-panel {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  padding: 14px;
  border-radius: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.field input,
.composer textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--panel-alt);
  color: var(--text);
  border-radius: 14px;
  padding: 12px 14px;
  outline: none;
  text-align: start;
  unicode-bidi: plaintext;
}

.field input:focus,
.composer textarea:focus {
  border-color: #696969;
}

.status-strip {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-badge {
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel-alt);
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.status-badge[data-tone="ok"] {
  color: #d8d8d8;
}

.status-badge[data-tone="error"] {
  color: var(--error);
}

.status-text {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.chat-feed {
  margin-top: 14px;
  min-height: 48vh;
  max-height: 58vh;
  overflow-y: auto;
  padding: 18px;
  border-radius: 22px;
  display: grid;
  gap: 14px;
}

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

.empty-state h2 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 24px;
}

.empty-state p {
  margin: 0;
}

.message {
  display: grid;
  gap: 8px;
}

.message[data-role="user"] {
  justify-items: end;
}

.message[data-role="assistant"] {
  justify-items: start;
}

.message-meta {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  direction: ltr;
}

.message-body {
  max-width: min(720px, 100%);
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  white-space: pre-wrap;
  line-height: 1.55;
  text-align: start;
  unicode-bidi: plaintext;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.message-body[dir="rtl"],
.composer textarea[dir="rtl"] {
  text-align: right;
}

.message[data-role="user"] .message-body {
  background: var(--user);
  color: #111;
}

.message[data-role="assistant"] .message-body {
  background: var(--assistant);
  color: var(--text);
}

.message[data-pending="true"] .message-body {
  color: var(--muted);
}

.message-events {
  width: min(720px, 100%);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-soft);
  color: var(--muted);
  overflow: hidden;
}

.message-events summary {
  cursor: pointer;
  padding: 10px 12px;
  user-select: none;
}

.message-events pre {
  margin: 0;
  padding: 0 12px 12px;
  max-height: 220px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.45;
}

.composer {
  margin-top: 14px;
  padding: 14px;
  border-radius: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
}

.composer textarea {
  min-height: 96px;
  resize: vertical;
}

button {
  border: 1px solid var(--line);
  background: var(--accent);
  color: #101010;
  border-radius: 14px;
  padding: 12px 18px;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease, background 120ms ease;
}

button.secondary {
  background: var(--panel-alt);
  color: var(--text);
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: wait;
}

@media (max-width: 900px) {
  .control-panel {
    grid-template-columns: 1fr;
  }

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

  .composer {
    grid-template-columns: 1fr;
  }

  .chat-feed {
    min-height: 52vh;
    max-height: none;
  }
}