@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;700;800&display=swap');

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

:root {
  --bg: #0a0d14;
  --bg-card: #111622;
  --border: rgba(79,142,247,0.12);
  --text: #8b9cbb;
  --text-h: #e8edf7;
  --blue: #4f8ef7;
  --purple: #7c3aed;
  --teal: #14b8a6;
  --red: #ef4444;
  --amber: #f59e0b;
  --green: #22c55e;
}

/* ── KEYFRAMES ── */
@keyframes fadeUp   { from{opacity:0;transform:translateY(32px)} to{opacity:1;transform:translateY(0)} }
@keyframes fadeIn   { from{opacity:0} to{opacity:1} }
@keyframes slideInLeft { from{opacity:0;transform:translateX(-28px)} to{opacity:1;transform:translateX(0)} }
@keyframes slideInRight{ from{opacity:0;transform:translateX(28px)} to{opacity:1;transform:translateX(0)} }
@keyframes float    { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-6px)} }
@keyframes gradShift{ 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }
@keyframes borderGlow{ 0%,100%{border-color:rgba(79,142,247,0.18)} 50%{border-color:rgba(79,142,247,0.55)} }
@keyframes countUp  { from{opacity:0;transform:scale(0.7)} to{opacity:1;transform:scale(1)} }
@keyframes shimmer  { 0%{background-position:-200% center} 100%{background-position:200% center} }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,13,20,0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
  padding: 0 24px;
}
nav.scrolled { border-color: var(--border); background: rgba(10,13,20,0.92); }
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; height: 60px; gap: 24px; }
.nav-logo { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1rem; color: var(--text-h); text-decoration: none; display: flex; align-items: center; gap: 8px; margin-right: auto; }
.nav-links { display: flex; list-style: none; gap: 4px; }
.nav-links a { color: var(--text); text-decoration: none; font-size: 0.85rem; padding: 6px 12px; border-radius: 6px; transition: color .2s, background .2s; position: relative; }
.nav-links a::after { content:''; position:absolute; bottom:2px; left:12px; right:12px; height:2px; background:var(--blue); border-radius:2px; transform:scaleX(0); transition:transform .25s; }
.nav-links a:hover, .nav-links a.active { color: var(--text-h); background: rgba(79,142,247,0.08); }
.nav-links a.active::after { transform:scaleX(1); }
.nav-links a:hover::after { transform:scaleX(1); }
.nav-github { display: flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 8px; border: 1px solid var(--border); color: var(--text-h); font-size: 0.82rem; font-weight: 600; text-decoration: none; transition: border-color .2s, background .2s; }
.nav-github:hover { border-color: var(--blue); background: rgba(79,142,247,0.08); }
.burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.burger span { display: block; width: 22px; height: 2px; background: var(--text-h); border-radius: 2px; transition: .3s; }

/* ── HERO ── */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 100px 24px 60px; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -20%; left: -10%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(79,142,247,0.12) 0%, transparent 70%);
  animation: blobFloat 8s ease-in-out infinite;
}
.hero::after {
  content: ''; position: absolute; bottom: -10%; right: -10%; width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.1) 0%, transparent 70%);
  animation: blobFloat 10s ease-in-out infinite reverse;
}
@keyframes blobFloat { 0%,100%{transform:translateY(0) scale(1)} 50%{transform:translateY(-30px) scale(1.05)} }

.hero-inner { position: relative; z-index: 1; max-width: 860px; }
.hero-tag { display: inline-flex; align-items: center; gap: 8px; font-size: 0.78rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--blue); background: rgba(79,142,247,0.1); border: 1px solid rgba(79,142,247,0.2); border-radius: 100px; padding: 6px 16px; margin-bottom: 28px; animation: fadeIn .8s ease both; }
h1.hero-title { font-family: 'Space Grotesk', sans-serif; font-size: clamp(2rem, 5vw, 3.6rem); font-weight: 800; color: var(--text-h); line-height: 1.15; margin-bottom: 24px; animation: fadeUp .9s .2s ease both; }
.hero-subtitle { font-size: 1rem; line-height: 1.8; color: var(--text); max-width: 660px; margin: 0 auto 32px; animation: fadeUp .9s .4s ease both; }
.hero-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 36px; animation: fadeUp .9s .55s ease both; }
.hero-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; animation: fadeUp .9s .7s ease both; }
.hero-tag-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--blue); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(1.4)} }

h1.hero-title { font-family: 'Space Grotesk', sans-serif; font-size: clamp(2rem, 5vw, 3.6rem); font-weight: 800; color: var(--text-h); line-height: 1.15; margin-bottom: 24px; }
.hero-title .grad { background: linear-gradient(135deg,var(--blue),var(--purple)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-title .accent { color: var(--teal); }
.hero-subtitle { font-size: 1rem; line-height: 1.8; color: var(--text); max-width: 660px; margin: 0 auto 32px; }
.hero-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 36px; }
.hero-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ── BUTTONS ── */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 24px; border-radius: 10px; font-size: 0.9rem; font-weight: 600; text-decoration: none; transition: all .2s; cursor: pointer; }
.btn-primary { background: linear-gradient(135deg,var(--blue),var(--purple)); color: #fff; box-shadow: 0 4px 20px rgba(79,142,247,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,142,247,0.4); }
.btn-outline { border: 1px solid var(--border); color: var(--text-h); background: transparent; }
.btn-outline:hover { border-color: var(--blue); background: rgba(79,142,247,0.08); }

/* ── BADGES ── */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 100px; font-size: 0.72rem; font-weight: 600; }
.badge-blue { background: rgba(79,142,247,0.12); color: var(--blue); border: 1px solid rgba(79,142,247,0.2); }
.badge-purple { background: rgba(124,58,237,0.12); color: var(--purple); border: 1px solid rgba(124,58,237,0.2); }
/* hero badges float gently */
.hero-badges .badge { animation: float 3s ease-in-out infinite; }
.hero-badges .badge:nth-child(2){ animation-delay:.3s }
.hero-badges .badge:nth-child(3){ animation-delay:.6s }
.hero-badges .badge:nth-child(4){ animation-delay:.9s }
.hero-badges .badge:nth-child(5){ animation-delay:1.2s }
.badge-teal { background: rgba(20,184,166,0.12); color: var(--teal); border: 1px solid rgba(20,184,166,0.2); }
.badge-amber { background: rgba(245,158,11,0.12); color: var(--amber); border: 1px solid rgba(245,158,11,0.2); }

/* ── SECTIONS ── */
.section { padding: 100px 24px; }
.section:nth-child(even) { background: rgba(255,255,255,0.012); }
.container { max-width: 1100px; margin: 0 auto; }
.section-label { font-family: 'Space Grotesk', sans-serif; font-size: 0.7rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: var(--blue); margin-bottom: 10px; animation: slideInLeft .6s ease both; }
.section-title { font-family: 'Space Grotesk', sans-serif; font-size: clamp(1.6rem,4vw,2.4rem); font-weight: 800; color: var(--text-h); margin-bottom: 8px; }
.section-title span { background: linear-gradient(135deg,var(--blue),var(--purple)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.section-divider { height: 3px; width: 48px; background: linear-gradient(90deg,var(--blue),var(--purple)); border-radius: 3px; margin-bottom: 48px; }

/* ── CARDS ── */
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 24px 28px; transition: border-color .3s, transform .3s, box-shadow .3s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; inset: 0; border-radius: 16px;
  background: radial-gradient(circle at var(--mx,50%) var(--my,50%), rgba(79,142,247,0.07) 0%, transparent 65%);
  opacity: 0; transition: opacity .4s;
}
.card:hover { border-color: rgba(79,142,247,0.4); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(79,142,247,0.12); }
.card:hover::before { opacity: 1; }

/* ── GRIDS ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

/* ── TABLE ── */
table { width: 100%; border-collapse: collapse; }
th { padding: 12px 20px; text-align: left; font-size: .78rem; font-weight: 700; color: var(--blue); letter-spacing: .05em; text-transform: uppercase; border-bottom: 1px solid var(--border); background: rgba(79,142,247,0.06); }
td { padding: 12px 20px; border-bottom: 1px solid rgba(79,142,247,0.06); font-size: .88rem; }
.hl-row { background: rgba(79,142,247,0.07); border-left: 3px solid var(--blue) !important; }
tr { border-left: 3px solid transparent; }

/* ── SENTINEL BLOCK ── */
.sentinel-block {
  background: linear-gradient(135deg,rgba(79,142,247,0.06),rgba(124,58,237,0.06));
  border: 1px solid rgba(79,142,247,0.18); border-radius: 20px; padding: 40px 36px;
  animation: borderGlow 3s ease-in-out infinite;
}
.sentinel-steps { display: flex; flex-direction: column; gap: 0; }
.sentinel-step { display: flex; gap: 16px; align-items: flex-start; padding-bottom: 20px; position: relative; }
.sentinel-step:last-child { padding-bottom: 0; }
.step-line { position: absolute; left: 15px; top: 32px; bottom: 0; width: 2px; background: rgba(79,142,247,0.2); }
.step-num { width: 32px; height: 32px; border-radius: 50%; background: rgba(79,142,247,0.12); border: 1.5px solid rgba(79,142,247,0.35); display: flex; align-items: center; justify-content: center; font-size: .78rem; font-weight: 700; color: var(--blue); flex-shrink: 0; z-index: 1; }
.step-num.teal { background: rgba(20,184,166,0.12); border-color: rgba(20,184,166,0.35); color: var(--teal); }
.step-content { padding-top: 4px; }
.step-title { font-size: .9rem; font-weight: 600; color: var(--text-h); margin-bottom: 4px; }

/* ── FLOWCHART ── */
.flowchart-wrap { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; margin-bottom: 56px; }
.flowchart-label { padding: 14px 24px; border-bottom: 1px solid var(--border); font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--blue); }
.flowchart-wrap img { width: 100%; height: auto; display: block; }

/* ── TEAM ── */
.avatar { border-radius: 50%; overflow: hidden; flex-shrink: 0; border: 2.5px solid rgba(79,142,247,0.35); background: linear-gradient(135deg,var(--blue),var(--purple)); }
.avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ── FOOTER ── */
footer { border-top: 1px solid var(--border); padding: 32px 24px; text-align: center; font-size: .82rem; color: var(--text); }

/* ── LINK CARDS ── */
a.card { color: var(--text); }
a.card h3 { color: var(--text-h); }
a.card p { color: var(--text); }

/* ── RESPONSIVE ── */
@media(max-width:768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: rgba(10,13,20,0.97); padding: 16px; border-bottom: 1px solid var(--border); gap: 4px; }
  .nav-links.open { display: flex; }
  .burger { display: flex; }
  .abstract-grid { grid-template-columns: 1fr !important; }
}