/* ============================================================
   LLM Solutions — static site styles
   Pure CSS, no build step. Deep-navy + electric-blue tech theme.
   ============================================================ */

:root {
  --bg: #0a1628;
  --bg-2: #0c1a30;
  --surface: #11233f;
  --surface-2: #16294a;
  --text: #e9eef8;
  --muted: #9fb1cc;
  --accent: #3b82f6;
  --accent-2: #22d3ee;
  --border: rgba(255, 255, 255, 0.09);
  --radius: 16px;
  --maxw: 1120px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(59, 130, 246, 0.18), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(34, 211, 238, 0.12), transparent 55%),
    var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(8, 18, 34, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.brand img {
  height: 30px;
  width: auto;
  /* logo.svg is flat black -> render white on the dark header */
  filter: brightness(0) invert(1);
}
.brand .brand-name { font-size: 17px; }
.brand .brand-name span { color: var(--accent-2); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  padding: 9px 14px;
  border-radius: 10px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav-links a.active { color: var(--text); }
.nav-cta {
  margin-left: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121f !important;
  font-weight: 700 !important;
}
.nav-cta:hover { filter: brightness(1.08); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  width: 42px;
  height: 38px;
  font-size: 20px;
  cursor: pointer;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s, filter 0.15s, background 0.15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121f;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); }

/* ---------- Hero ---------- */
.hero { padding: 86px 0 64px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 6px 12px;
  border-radius: 999px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  margin: 18px 0 16px;
  letter-spacing: -0.5px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 560px;
  margin: 0 0 28px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual {
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.chat-mini { display: flex; flex-direction: column; gap: 12px; }
.chat-mini .row { display: flex; gap: 10px; align-items: flex-start; }
.chat-mini .dot {
  width: 30px; height: 30px; border-radius: 9px; flex: none;
  display: grid; place-items: center; font-size: 14px; font-weight: 700;
}
.chat-mini .dot.ai { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #04121f; }
.chat-mini .dot.user { background: var(--surface-2); color: var(--accent-2); border: 1px solid var(--border); }
.chat-mini .bubble {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text);
}
.chat-mini .bubble.ai { background: rgba(59, 130, 246, 0.12); border-color: rgba(59, 130, 246, 0.3); }

/* ---------- Sections ---------- */
section { padding: 56px 0; }
.section-head { max-width: 680px; margin: 0 auto 40px; text-align: center; }
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  margin: 8px 0 12px;
  letter-spacing: -0.4px;
}
.section-head p { color: var(--muted); font-size: 17px; margin: 0; }
.kicker {
  font-size: 13px; font-weight: 700; letter-spacing: 0.6px;
  text-transform: uppercase; color: var(--accent-2);
}

/* ---------- Cards grid ---------- */
.grid { display: grid; gap: 20px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: linear-gradient(170deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.18s, border-color 0.18s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(59, 130, 246, 0.4); }
.card .icon {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center; font-size: 22px;
  background: rgba(59, 130, 246, 0.14);
  border: 1px solid rgba(59, 130, 246, 0.3);
  margin-bottom: 16px;
}
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.card ul li { margin-bottom: 6px; }

.tag {
  display: inline-block; font-size: 12px; font-weight: 600;
  color: var(--accent-2); background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 3px 10px; border-radius: 999px; margin-bottom: 14px;
}

/* ---------- Stats strip ---------- */
.stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02); padding: 8px;
}
.stat { text-align: center; padding: 22px 14px; }
.stat .num {
  font-size: 34px; font-weight: 800;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat .label { color: var(--muted); font-size: 14px; }

/* ---------- Steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: -16px; left: 22px;
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121f; font-weight: 800; display: grid; place-items: center;
}
.step h4 { margin: 8px 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(34, 211, 238, 0.12));
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 22px;
  padding: 48px;
  text-align: center;
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); margin: 0 0 10px; }
.cta-band p { color: var(--muted); margin: 0 0 24px; font-size: 17px; }

/* ---------- Live chatbot demo ---------- */
.demo {
  background: linear-gradient(170deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  max-width: 720px;
  margin: 0 auto;
}
.demo-top {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}
.demo-top .avatar {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121f; font-weight: 800; display: grid; place-items: center;
}
.demo-top .meta strong { display: block; font-size: 15px; }
.demo-top .meta span { font-size: 13px; color: var(--accent-2); }
.demo-top .status {
  margin-left: auto; font-size: 12px; color: var(--muted);
  display: inline-flex; align-items: center; gap: 6px;
}
.demo-top .status::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: #34d399; box-shadow: 0 0 0 3px rgba(52, 211, 153, 0.2);
}
.demo-log {
  padding: 20px; height: 340px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 14px;
}
.msg { display: flex; gap: 10px; max-width: 88%; }
.msg .who {
  width: 30px; height: 30px; border-radius: 9px; flex: none;
  display: grid; place-items: center; font-size: 13px; font-weight: 700;
}
.msg.ai .who { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #04121f; }
.msg.user { margin-left: auto; flex-direction: row-reverse; }
.msg.user .who { background: var(--surface-2); border: 1px solid var(--border); color: var(--accent-2); }
.msg .text {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 12px; padding: 10px 14px; font-size: 15px;
}
.msg.ai .text { background: rgba(59, 130, 246, 0.12); border-color: rgba(59, 130, 246, 0.3); }
.msg .source { display: block; margin-top: 6px; font-size: 12px; color: var(--muted); }
.typing span {
  display: inline-block; width: 6px; height: 6px; margin: 0 1px;
  border-radius: 50%; background: var(--muted); animation: blink 1.2s infinite;
}
.typing span:nth-child(2) { animation-delay: 0.2s; }
.typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 60%, 100% { opacity: 0.25; } 30% { opacity: 1; } }

.demo-suggest { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 20px 14px; }
.chip {
  font-size: 13px; color: var(--text);
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border);
  padding: 7px 12px; border-radius: 999px; cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.chip:hover { background: rgba(59, 130, 246, 0.16); border-color: rgba(59, 130, 246, 0.4); }
.demo-input { display: flex; gap: 10px; padding: 16px 20px; border-top: 1px solid var(--border); }
.demo-input input {
  flex: 1; background: var(--bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px 16px; color: var(--text); font-size: 15px;
  font-family: var(--font);
}
.demo-input input:focus { outline: none; border-color: var(--accent); }
.demo-note { text-align: center; color: var(--muted); font-size: 13px; margin: 14px auto 0; max-width: 560px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--muted); }
.field input, .field textarea {
  width: 100%; background: var(--bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 14px; color: var(--text);
  font-size: 15px; font-family: var(--font);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { display: flex; gap: 14px; align-items: center; margin-bottom: 18px; }
.contact-list .ic {
  width: 44px; height: 44px; border-radius: 12px; flex: none;
  display: grid; place-items: center; font-size: 20px;
  background: rgba(59, 130, 246, 0.14); border: 1px solid rgba(59, 130, 246, 0.3);
}
.contact-list .ic + div span { display: block; font-size: 13px; color: var(--muted); }
.contact-list .ic + div strong { font-size: 16px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding: 40px 0 28px;
  background: rgba(0, 0, 0, 0.2);
}
.footer-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.footer-grid .brand img { filter: brightness(0) invert(1); height: 26px; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); font-size: 15px; }
.footer-links a:hover { color: var(--text); }
.copyright { color: var(--muted); font-size: 13px; margin-top: 22px; text-align: center; }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .grid.cols-3, .grid.cols-2, .steps, .stats, .contact-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(3, 1fr); }
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(8, 18, 34, 0.98); border-bottom: 1px solid var(--border);
    padding: 12px 22px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .nav-toggle { display: block; }
  .cta-band, .cta-band.big { padding: 32px 22px; }
}
@media (max-width: 520px) {
  .stats { grid-template-columns: 1fr; }
}