/* ─── reset & base ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0d0f14;
  --surface:  #161922;
  --border:   #232733;
  --accent:   #4f8eff;
  --accent2:  #7c5cfc;
  --text:     #e4e8f0;
  --muted:    #7a8099;
  --green:    #3ecf8e;
  --radius:   14px;
  --phone-w:  300px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ─── hero ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 72px;
  padding: 80px 40px;
  background: radial-gradient(ellipse 80% 60% at 10% 20%, rgba(79,142,255,.12) 0%, transparent 70%),
              radial-gradient(ellipse 60% 50% at 90% 80%, rgba(124,92,252,.10) 0%, transparent 70%);
  flex-wrap: wrap;
}

.hero-inner {
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(79,142,255,.12);
  border: 1px solid rgba(79,142,255,.3);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 99px;
  width: fit-content;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, #fff 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sub {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 440px;
}

.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 10px;
  font-size: .95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform .15s, box-shadow .15s, opacity .15s;
  width: fit-content;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(79,142,255,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,142,255,.45); }

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { transform: translateY(-2px); opacity: .85; }

/* ─── phone ─── */
.phone-wrap {
  perspective: 1200px;
}

.phone {
  width: var(--phone-w);
  background: #1a1d24;
  border-radius: 36px;
  border: 1.5px solid var(--border);
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.04) inset;
  transform: rotateY(-8deg) rotateX(4deg);
  transition: transform .4s ease;
}
.phone:hover { transform: rotateY(0deg) rotateX(0deg); }

.phone-notch {
  width: 100px;
  height: 24px;
  background: #111418;
  border-radius: 0 0 16px 16px;
  margin: 0 auto 0;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: #1e2128;
  border-bottom: 1px solid var(--border);
}

.chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.chat-name { font-weight: 700; font-size: .9rem; }
.chat-status { font-size: .72rem; color: var(--green); }

.chat-body {
  height: 340px;
  overflow-y: auto;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  scrollbar-width: none;
}
.chat-body::-webkit-scrollbar { display: none; }

.chat-keyboard {
  display: flex;
  gap: 6px;
  padding: 8px 12px 12px;
  background: #1e2128;
  border-top: 1px solid var(--border);
}

.kb-btn {
  flex: 1;
  padding: 9px 6px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #252932;
  color: var(--text);
  font-size: .8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.kb-btn:hover { background: var(--border); border-color: var(--accent); }

/* chat bubbles */
.bubble {
  max-width: 80%;
  padding: 8px 12px;
  border-radius: 14px;
  font-size: .82rem;
  line-height: 1.45;
  animation: pop .25s ease;
}
@keyframes pop {
  from { transform: scale(.85); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}
.bubble.user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border-bottom-right-radius: 4px;
}
.bubble.bot {
  align-self: flex-start;
  background: #252932;
  color: var(--text);
  border-bottom-left-radius: 4px;
}
.bubble.bot code {
  font-family: "SF Mono", monospace;
  background: rgba(255,255,255,.1);
  padding: 1px 4px;
  border-radius: 4px;
  font-size: .8em;
}
.typing {
  align-self: flex-start;
  background: #252932;
  border-radius: 14px;
  border-bottom-left-radius: 4px;
  padding: 10px 14px;
  display: flex;
  gap: 4px;
  align-items: center;
}
.typing span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--muted);
  animation: dot 1s infinite;
}
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes dot { 0%,80%,100%{opacity:.2} 40%{opacity:1} }

/* ─── sections shared ─── */
section {
  padding: 100px 40px;
  max-width: 960px;
  margin: 0 auto;
}

section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 48px;
  text-align: center;
}

/* ─── features ─── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color .2s, transform .2s;
}
.feature-card:hover {
  border-color: rgba(79,142,255,.4);
  transform: translateY(-3px);
}

.feat-icon { font-size: 1.8rem; margin-bottom: 12px; }

.feature-card h3 { font-size: 1rem; margin-bottom: 8px; }
.feature-card p  { font-size: .88rem; color: var(--muted); }
.feature-card code {
  font-family: "SF Mono", monospace;
  font-size: .82em;
  background: rgba(255,255,255,.07);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ─── how it works ─── */
.how { background: var(--surface); border-radius: 24px; padding: 80px 60px; max-width: 860px; }

.steps {
  display: flex;
  flex-direction: column;
  gap: 36px;
  list-style: none;
  padding: 0;
  counter-reset: none;
}

.steps li {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: .95rem;
  flex-shrink: 0;
}

.steps li div strong { display: block; font-size: 1rem; margin-bottom: 4px; }
.steps li div p      { font-size: .9rem; color: var(--muted); }
.steps li div code   {
  font-family: "SF Mono", monospace;
  font-size: .82em;
  background: rgba(255,255,255,.07);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ─── self host ─── */
.selfhost { text-align: center; }

.code-block {
  position: relative;
  text-align: left;
  background: #0e1117;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 620px;
  margin: 0 auto 20px;
}

.code-block pre {
  padding: 28px 32px;
  overflow-x: auto;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: .82rem;
  line-height: 1.75;
  color: var(--text);
}

.cm { color: #5c6370; }

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: .75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.copy-btn:hover { color: var(--text); border-color: var(--accent); }

.selfhost-note { font-size: .88rem; color: var(--muted); }
.selfhost-note a { color: var(--accent); text-decoration: none; }
.selfhost-note a:hover { text-decoration: underline; }

/* ─── footer ─── */
footer {
  text-align: center;
  padding: 40px;
  font-size: .82rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ─── live demo label ─── */
.demo-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--green);
  text-align: center;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  display: inline-block;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(.7); }
}

/* ─── inline copy button (inside bubble) ─── */
.copy-inline {
  display: inline-block;
  background: rgba(255,255,255,.18);
  border: none;
  color: #fff;
  font-size: .73rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 6px;
  transition: background .15s;
  font-family: inherit;
}
.copy-inline:hover { background: rgba(255,255,255,.3); }

/* bubble bold & code */
.bubble b    { font-weight: 700; }
.bubble code {
  font-family: "SF Mono", monospace;
  background: rgba(255,255,255,.12);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: .8em;
  word-break: break-all;
}

/* ─── responsive ─── */
@media (max-width: 700px) {
  .hero { gap: 48px; padding: 60px 20px; }
  .phone { transform: none; }
  .how { padding: 60px 28px; }
  section { padding: 80px 20px; }
}