:root {
  --kairos-purple: #8b45ff;
  --kairos-purple-deep: #6b2db8;
  --kairos-purple-dim: #5a2599;
  --bg-dark: #0e0e0e;
  --bg-panel: #141414;
  --text: #f5f5f5;
  --text-light: #ffffff;
  --text-muted: #b5b5b5;
  --border-color: rgba(139, 69, 255, 0.2);
  --border-color-light: rgba(139, 69, 255, 0.1);
}

body.kairos-theme {
  background: #000000;
  color: var(--text);
  font-family: 'CommitMono', monospace;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
  padding: 3rem 0 2rem;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin: 0 0 0.5rem 0;
  color: var(--kairos-purple);
}
.hero p {
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 1.05rem;
}

.panel {
  background: linear-gradient(180deg, rgba(139, 69, 255, 0.06), rgba(139, 69, 255, 0.02));
  border: 1px solid rgba(139, 69, 255, 0.18);
  border-radius: 14px;
  padding: 1.25rem;
}

.cta {
  margin-top: 1.25rem;
}
.btn {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  border: 2px solid var(--kairos-purple);
  color: var(--kairos-purple);
  background: transparent;
  text-decoration: none;
  font-weight: 600;
}
.btn:hover { background: var(--kairos-purple); color: #141414; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
.stat {
  background: #111;
  border: 1px solid rgba(139, 69, 255, 0.12);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
}
.stat .value { color: var(--kairos-purple); font-size: 1.4rem; font-weight: 700; }
.stat .label { color: var(--text-muted); font-size: 0.9rem; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}
.split .card {
  background: #0f0f0f;
  border: 1px solid rgba(139, 69, 255, 0.12);
  border-radius: 12px;
  padding: 1rem;
}
.card h3 { color: var(--kairos-purple); margin-top: 0; }
.card p { color: var(--text-muted); }
.card code { background: #151515; color: #d4a3ff; padding: 0.15rem 0.35rem; border-radius: 4px; }

.api-section { margin-top: 2rem; }
.api-section h2 { color: var(--kairos-purple); }
pre { background: #0b0b0b; border: 1px solid rgba(139, 69, 255, 0.15); padding: 1rem; border-radius: 8px; overflow-x: auto; }

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(139, 69, 255, 0.15);
  margin-bottom: 2rem;
}

.brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--kairos-purple);
  letter-spacing: 0.1em;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.nav a:hover {
  color: var(--kairos-purple);
  background: rgba(139, 69, 255, 0.1);
  border-color: var(--border-color);
}

.auth-form label {
  display: block;
  margin-bottom: 0.5em;
  font-weight: 600;
  color: var(--text);
}

.auth-form input[type="email"],
.auth-form input[type="password"] {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  transition: all 0.3s ease;
}

.auth-form input[type="email"]:focus,
.auth-form input[type="password"]:focus {
  outline: none;
  border-color: var(--kairos-purple);
  box-shadow: 0 0 0 3px rgba(139, 69, 255, 0.1);
}

.auth-form button, #github-auth button, #sign-out-button {
  padding: 0.75rem 1.5rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-family: inherit;
  transition: all 0.3s ease;
}

#sign-in-button, #sign-up-button {
  background: linear-gradient(135deg, var(--kairos-purple), var(--kairos-purple-deep));
  color: white;
}

#sign-in-button:hover, #sign-up-button:hover {
  background: linear-gradient(135deg, var(--kairos-purple-deep), var(--kairos-purple-dim));
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(139, 69, 255, 0.3);
}

#github-signin-button {
  background: rgba(0, 0, 0, 0.3);
  color: var(--text);
  border: 1px solid var(--border-color);
}

#github-signin-button:hover {
  background: rgba(139, 69, 255, 0.1);
  border-color: var(--kairos-purple);
}

#sign-out-button {
  background: linear-gradient(135deg, #ff6b6b, #e74c3c);
  color: white;
  margin-top: 1rem;
}

#sign-out-button:hover {
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  transform: translateY(-2px);
}

#auth-status {
  margin-top: 1rem;
  font-style: italic;
  min-height: 1.2em;
  color: var(--text-muted);
}

#user-api-key-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

#user-api-key-section p {
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text);
}

#user-api-key-section code {
  background: rgba(139, 69, 255, 0.1);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  display: inline-block;
  word-break: break-all;
  color: var(--kairos-purple);
  border: 1px solid var(--border-color);
  font-family: 'Courier New', monospace;
}

#copy-api-key-button {
  margin-left: 0.5rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.9em;
  cursor: pointer;
  background: var(--kairos-purple);
  color: white;
  border: none;
  border-radius: 4px;
  transition: all 0.3s ease;
}

#copy-api-key-button:hover {
  background: var(--kairos-purple-deep);
}

#toggle-api-key-visibility-button, #cycle-api-key-button {
  margin-left: 0.5rem;
  margin-top: 0.5rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.9em;
  cursor: pointer;
  background: white;
  color: var(--kairos-purple);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all 0.3s ease;
}

#toggle-api-key-visibility-button:hover, #cycle-api-key-button:hover {
  background: var(--kairos-purple);
  color: white;
}

h3, h4 {
  color: var(--kairos-purple);
  border-bottom: 1px solid rgba(139, 69, 255, 0.2);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.tab-container {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 1rem;
  background: rgba(0, 0, 0, 0.2);
}

.tab-nav {
  display: flex;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border-color);
}

.tab-button {
  padding: 1rem 1.5rem;
  cursor: pointer;
  border: none;
  border-right: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-muted);
  font-weight: 600;
  flex-grow: 1;
  text-align: center;
  transition: all 0.3s ease;
  font-family: inherit;
}

.tab-button:last-child {
  border-right: none;
}

.tab-button.active {
  background: rgba(139, 69, 255, 0.1);
  color: var(--kairos-purple);
  border-bottom: 2px solid var(--kairos-purple);
}

.tab-button:hover:not(.active) {
  background: rgba(139, 69, 255, 0.05);
  color: var(--text);
}

.tab-content {
  padding: 1.5rem;
  background: rgba(0, 0, 0, 0.1);
}

code {
  background-color: rgba(139, 69, 255, 0.1);
  color: var(--kairos-purple);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  border: 1px solid rgba(139, 69, 255, 0.2);
}

li {
  margin-bottom: 0.5rem;
  color: var(--text);
}

pre {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  color: var(--text);
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

footer { 
  margin-top: 3rem; 
  padding: 1.5rem 0; 
  color: var(--text-muted); 
  border-top: 1px solid rgba(139, 69, 255, 0.12); 
  text-align: center; 
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
}