/* frAInk — letmebefraink.com */

:root {
  --bg: #0d0f12;
  --bg-card: #161b22;
  --bg-hover: #1c2128;
  --border: #30363d;
  --text: #c9d1d9;
  --text-dim: #768390;
  --text-bright: #e6edf3;
  --accent: #3fb950;
  --accent-dim: #2ea043;
  --accent-glow: rgba(63, 185, 80, 0.1);
  --link: #58a6ff;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.7;
  min-height: 100vh;
}

/* ── Layout ── */

.site-wrapper {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ── */

nav {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}

nav .nav-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-logo span {
  color: var(--text-dim);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-bright);
}

/* ── Page sections ── */

.page-header {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.page-header .tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.page-header .subtitle {
  font-size: 1.05rem;
  color: var(--text-dim);
  max-width: 560px;
  line-height: 1.65;
}

/* ── Home hero ── */

.hero {
  padding: 80px 0 56px;
}

.hero .label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero .label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero .lead {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Buttons ── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #0d0f12;
}

.btn-primary:hover {
  background: #4ac160;
  color: #0d0f12;
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--text-dim);
  background: var(--bg-hover);
}

.btn-coffee {
  background: #ffdd00;
  color: #0d0f12;
}

.btn-coffee:hover {
  background: #f5d400;
  color: #0d0f12;
}

/* ── Mission block ── */

.mission-block {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--bg-card);
  border-radius: 6px;
  padding: 28px 32px;
  margin: 48px 0;
}

.mission-block p {
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.75;
}

/* ── Grid cards ── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 40px 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  transition: border-color 0.15s, background 0.15s;
}

.card:hover {
  border-color: var(--accent-dim);
  background: var(--bg-hover);
}

.card-icon {
  font-size: 1.4rem;
  margin-bottom: 12px;
  display: block;
}

.card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 8px;
}

.card p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.55;
}

/* ── Experiments list ── */

.experiments-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.experiment-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
  margin-bottom: 10px;
}

.experiment-item:hover {
  border-color: var(--accent-dim);
  background: var(--bg-hover);
}

.experiment-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(63, 185, 80, 0.2);
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

.experiment-body {
  flex: 1;
  min-width: 0;
}

.experiment-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 4px;
}

.experiment-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.experiment-meta span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}

.badge-complete {
  background: rgba(63, 185, 80, 0.12);
  color: var(--accent);
  border: 1px solid rgba(63, 185, 80, 0.25);
}

.badge-running {
  background: rgba(88, 166, 255, 0.12);
  color: var(--link);
  border: 1px solid rgba(88, 166, 255, 0.25);
}

/* ── About / prose ── */

.prose {
  max-width: 680px;
}

.prose h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-bright);
  margin: 48px 0 16px;
  letter-spacing: -0.3px;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose p {
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 0.975rem;
}

.prose p em {
  color: var(--text-bright);
  font-style: normal;
  font-weight: 500;
}

.prose blockquote {
  border-left: 3px solid var(--accent);
  margin: 24px 0;
  padding: 16px 24px;
  background: var(--bg-card);
  border-radius: 0 6px 6px 0;
}

.prose blockquote p {
  color: var(--text-bright);
  font-style: italic;
  margin: 0;
}

/* ── Values list ── */

.values-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0;
}

.value-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.value-item .vi-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.value-item .vi-text {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
}

/* ── Purrnest section ── */

.purrnest-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 32px;
  margin: 32px 0;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.purrnest-emoji {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.purrnest-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 8px;
}

.purrnest-card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin: 0;
}

/* ── Section divider ── */

.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* ── Footer ── */

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 80px;
}

footer .footer-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer .footer-brand {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-dim);
}

footer .footer-brand strong {
  color: var(--accent);
}

footer .footer-links {
  display: flex;
  gap: 20px;
}

footer .footer-links a {
  font-size: 0.82rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}

footer .footer-links a:hover {
  color: var(--text);
}

/* ── Responsive ── */

@media (max-width: 600px) {
  .hero h1 { font-size: 2rem; }
  .page-header h1 { font-size: 1.6rem; }
  nav .nav-inner { flex-direction: column; gap: 12px; align-items: flex-start; }
  .cards { grid-template-columns: 1fr; }
  .purrnest-card { flex-direction: column; }
  footer .footer-inner { flex-direction: column; }
}

/* ── Chat layout ── */

.chat-layout {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 61px); /* subtract nav height */
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chat-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  animation: pulse 2.5s ease-in-out infinite;
}

.chat-title {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-bright);
  font-size: 0.95rem;
}

.chat-subtitle {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* ── Messages ── */

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  scroll-behavior: smooth;
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.msg {
  display: flex;
  max-width: 86%;
}

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

.msg-fraink {
  align-self: flex-start;
}

.msg-content {
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 0.925rem;
  line-height: 1.7;
}

.msg-user .msg-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px 12px 2px 12px;
  color: var(--text);
}

.msg-fraink .msg-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 2px 12px 12px 12px;
  color: var(--text-bright);
}

.msg-content p {
  margin: 0 0 10px 0;
  color: inherit;
}

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

/* Blinking cursor during streaming */
.typing-indicator {
  display: inline-block;
  color: var(--accent);
  animation: blink 0.8s step-end infinite;
  font-family: var(--font-mono);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ── Input area ── */

.chat-input-area {
  border-top: 1px solid var(--border);
  padding: 16px 0 20px;
  flex-shrink: 0;
}

.chat-input-wrapper {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  transition: border-color 0.15s;
}

.chat-input-wrapper:focus-within {
  border-color: var(--accent-dim);
}

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-bright);
  font-family: var(--font-sans);
  font-size: 0.925rem;
  line-height: 1.55;
  resize: none;
  min-height: 24px;
  max-height: 180px;
  padding: 0;
}

.chat-input::placeholder {
  color: var(--text-dim);
}

.chat-send-btn {
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #0d0f12;
  cursor: pointer;
  padding: 7px 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, opacity 0.15s;
}

.chat-send-btn:hover:not(:disabled) {
  background: #4ac160;
}

.chat-send-btn:disabled {
  cursor: not-allowed;
}

.chat-hint {
  font-size: 0.73rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-top: 6px;
  text-align: center;
}

/* Chat page: hide footer, full-height layout */
body:has(.chat-layout) footer {
  display: none;
}

@media (max-width: 600px) {
  .chat-subtitle { display: none; }
  .msg { max-width: 95%; }
}