/* Dark, simple, Apple-inspired */
:root {
  --bg: #0b0c0f;
  --panel: #111216;
  --text: #e5e7eb;
  --muted: #9aa0aa;
  --border: #1f232b;
  --accent: #7aa2ff;
  --accent-2: #b9c1d1;
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); }
body { font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji"; line-height: 1.65; text-rendering: optimizeLegibility; }

.container { width: min(100%, 920px); margin-inline: auto; padding-inline: 22px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(11,12,15,0.75); backdrop-filter: saturate(180%) blur(10px); border-bottom: 1px solid var(--border); }
.brand { font-size: clamp(28px, 6vw, 64px); letter-spacing: -0.02em; margin: 18px 0; font-weight: 700; }

/* Lead */
.lead { padding: 42px 0 10px; }
.lead p { margin: 0 0 12px; font-size: 18px; color: var(--muted); }

/* Tiny ambient chat teaser */
.chat-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  margin-top: 32px;
  text-align: center;
  max-width: 240px;
  font-size: 14px;
  color: var(--muted);
  backdrop-filter: blur(6px);
  box-shadow: inset 0 0 4px rgba(255,255,255,0.03);
}
.chat-placeholder { margin: 0; letter-spacing: 0.2px; color: var(--muted); }
.chat-placeholder .coming-soon { opacity: 0.6; font-style: italic; }

/* Sections */
.section { padding: 36px 0; border-top: 1px solid var(--border); }
.section h2 { margin: 0 0 12px; font-size: 22px; letter-spacing: .2px; }
.section p { margin: 0 0 12px; color: var(--text); }
.muted { color: var(--muted); }

/* Cards / grid */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 12px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.card-body { padding: 16px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.placeholder p { color: var(--muted); }

/* Chat panel (new section) */
.chat-panel {
  background: #0f1216; /* slightly different dark */
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.chat-messages {
  height: min(45vh, 420px);
  overflow: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: linear-gradient(180deg, #101318 0%, #0d1014 100%);
}
.msg {
  max-width: 80%;
  padding: 10px 12px;
  border-radius: 12px;
  line-height: 1.45;
  font-size: 15px;
}
.msg.user {
  margin-left: auto;
  background: #1b2330;
  border: 1px solid #293142;
  color: var(--accent-2);
}
.msg.bot {
  background: #141922;
  border: 1px solid #232938;
  color: #d8deea;
}
.chat-input {
  display: flex;
  gap: 10px;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: #0e1216;
}
.chat-input input {
  flex: 1;
  background: #0b0f13;
  color: var(--text);
  border: 1px solid #232838;
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
}
.chat-input input::placeholder { color: #7b8393; }
.send-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid #2a3344;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
}
.send-btn:hover { border-color: var(--accent); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); }
.site-footer .container { padding: 20px 22px; color: var(--muted); font-size: 14px; }
a { color: var(--text); }
a:hover { color: var(--accent); }

@media (max-width: 520px) {
  .msg { font-size: 14px; }
  .chat-messages { height: 44vh; }
}