:root {
  --bg: #14161a;
  --panel: #1d2025;
  --border: #2b2f36;
  --text: #e8e8ea;
  --text-soft: #9a9fa8;
  --accent: #5b8cff;
  --error: #ff6b6b;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

/* The hidden attribute must win over any element's own `display: flex` rule
   below (.log and .composer both set display explicitly, which otherwise
   ties with [hidden] on specificity and wins on source order). */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.login-body {
  align-items: center;
  justify-content: center;
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.login-card h1 {
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
}

.login-card input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem;
  border-radius: 8px;
}

.login-card button, .composer button, .topbar-actions button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1rem;
  cursor: pointer;
  font-weight: 600;
}

.login-card button:hover, .composer button:hover, .topbar-actions button:hover {
  opacity: 0.9;
}

.error { color: var(--error); font-size: 0.9rem; margin: 0; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1.2rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.site-tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.site-tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-soft);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}

.site-tab.active {
  border-color: var(--accent);
  color: var(--text);
  background: rgba(91, 140, 255, 0.15);
}

.topbar-actions { display: flex; gap: 0.8rem; align-items: center; }
.topbar-actions a { color: var(--text-soft); font-size: 0.85rem; text-decoration: none; }
.topbar-actions button { font-size: 0.8rem; padding: 0.4rem 0.8rem; }

.log {
  flex: 1;
  overflow-y: auto;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.line {
  max-width: 70ch;
  white-space: pre-wrap;
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
  line-height: 1.4;
}

.line.user {
  align-self: flex-end;
  background: var(--accent);
  color: white;
}

.line.assistant {
  align-self: flex-start;
  background: var(--panel);
  border: 1px solid var(--border);
}

.line.system {
  align-self: center;
  color: var(--text-soft);
  font-size: 0.8rem;
  background: none;
  padding: 0.2rem;
}

.composer {
  display: flex;
  gap: 0.6rem;
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--border);
  background: var(--panel);
}

.composer textarea {
  flex: 1;
  resize: none;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.6rem;
  font-family: inherit;
}