:root {
  --bg: #000000;
  --fg: #ffffff;
  --fg-dim: #9a9a9a;
  --fg-faint: #555555;
  --border: #333333;
  --accent: #ffffff;
  --font-mono: 'Courier New', Courier, monospace;
}

* {
  box-sizing: border-box;
}

[hidden],
.hidden {
  display: none !important;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  height: 100vh;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Login Screen */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 1rem;
}

.login-box {
  width: 100%;
  max-width: 420px;
  background: #0a0a0a;
  border: 1px solid var(--border);
  padding: 2rem 1.75rem;
}

.login-box h1 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 1px;
  color: var(--fg);
}

#login-subtitle {
  margin: 0 0 1.5rem;
  font-size: 0.75rem;
  color: var(--fg-dim);
}

.input-group {
  margin-bottom: 1rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--fg-dim);
}

input {
  width: 100%;
  padding: 0.55rem 0.6rem;
  background: #000;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 0;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  outline: none;
}

input:focus {
  border-color: var(--fg);
}

::placeholder {
  color: var(--fg-faint);
}

button {
  background: #000;
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 0.6rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
}

button:hover,
button:focus-visible {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

button.secondary {
  border-color: #222;
  color: var(--fg-dim);
}

button.secondary:hover {
  color: var(--bg);
  border-color: var(--fg-dim);
  background: var(--fg-dim);
}

.error {
  margin: 1rem 0 0;
  font-size: 0.75rem;
  color: var(--fg);
  min-height: 1em;
}

/* Chat Interface */
.chat-container {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.7rem;
  color: var(--fg-dim);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.chat-header .status {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.messages-list {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 0;
}

.messages-list::-webkit-scrollbar {
  width: 8px;
}

.messages-list::-webkit-scrollbar-track {
  background: #000;
}

.messages-list::-webkit-scrollbar-thumb {
  background: var(--border);
}

.message {
  max-width: 92%;
  padding: 0.5rem 0.75rem;
  line-height: 1.5;
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.message.user {
  align-self: flex-end;
  border: 1px solid #333;
  color: var(--fg);
}

.message.assistant {
  align-self: flex-start;
  border: 1px solid #1c1c1c;
  color: var(--fg);
  background: #0a0a0a;
}

.message.system {
  align-self: flex-start;
  border: 1px solid #444;
  color: var(--fg-dim);
  font-size: 0.8rem;
}

.message .meta {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--fg-faint);
}

.message.user .meta {
  text-align: right;
}

.message pre {
  background: #050505;
  border: 1px solid #222;
  padding: 0.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.message code {
  font-family: var(--font-mono);
  background: #0d0d0d;
  padding: 0 0.25rem;
}

.message a {
  color: var(--fg);
  text-decoration: underline;
}

.message h1,
.message h2,
.message h3,
.message h4,
.message h5,
.message h6 {
  font-size: 1rem;
  margin: 0.5rem 0;
}

.message table {
  border-collapse: collapse;
  margin: 0.5rem 0;
  width: 100%;
  font-size: 0.85rem;
}

.message th,
.message td {
  border: 1px solid var(--border);
  padding: 0.3rem 0.5rem;
  text-align: left;
}

.message th {
  background: #0d0d0d;
}

.message blockquote {
  margin: 0.5rem 0;
  padding-left: 0.75rem;
  border-left: 2px solid var(--fg-dim);
  color: var(--fg-dim);
}

.message hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0.75rem 0;
}

.message ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.message img {
  max-width: 100%;
  border: 1px solid var(--border);
}

.message.thinking {
  color: var(--fg-dim);
}

.message.thinking #thinking-dots {
  display: inline-block;
  min-width: 0.6em;
  text-align: left;
}

/* Input Area */
.input-area {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border);
  background: #000;
  padding: 0 0.8rem;
}

.prompt-glyph {
  color: var(--fg-faint);
  font-size: 1rem;
  line-height: 1;
  margin-right: 0.5rem;
  flex: none;
  user-select: none;
}

.input-area input {
  flex: 1;
  border: none;
  border-radius: 0;
  padding: 0.75rem 0;
  font-size: 0.95rem;
  background: #000;
  color: var(--fg);
}

.input-area input:focus {
  outline: none;
}

/* Command suggestions */
.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.5rem 0.8rem;
  border-top: 1px solid var(--border);
}

.suggestions button {
  border: 1px solid #333;
  background: #000;
  color: var(--fg-dim);
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  text-transform: none;
  letter-spacing: 0;
  cursor: pointer;
}

.suggestions button.selected,
.suggestions button:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}