/* synapse design system */
:root {
  --bg:        #06070a;
  --bg-deep:   #0c0e14;
  --bg-soft:   #10131c;
  --panel:     #0f1218;
  --line:      #161b24;
  --line2:     #232b39;
  --fg:        #d8e0ec;
  --dim:       #6b7384;
  --dim2:      #9aa3b3;
  --accent:    #6effc6;
  --accent2:   #6ec3ff;
  --hot:       #ff6e9c;
  --warn:      #ffcd6e;
  --bad:       #ff6e6e;
  --mono: ui-monospace, "JetBrains Mono", "Fira Code", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(110,255,198,0.07), transparent 60%),
    radial-gradient(700px 400px at 0% 100%, rgba(110,195,255,0.05), transparent 60%),
    repeating-linear-gradient(
      0deg,
      transparent 0px,
      transparent 38px,
      rgba(255,255,255,0.012) 38px,
      rgba(255,255,255,0.012) 39px
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0px,
      transparent 38px,
      rgba(255,255,255,0.012) 38px,
      rgba(255,255,255,0.012) 39px
    );
}
body > * { position: relative; z-index: 1; }

a { color: var(--fg); text-decoration: none; transition: color 160ms ease; }
a:hover { color: var(--accent); }

h1, h2, h3 { font-weight: 400; letter-spacing: -0.01em; margin: 0 0 0.6em; }
h1 { font-size: 38px; line-height: 1.05; color: #fff; font-weight: 300; }
h2 { font-size: 18px; color: var(--fg); margin-top: 2.2em; text-transform: lowercase; }
h3 { font-size: 14px; color: #fff; margin-top: 1.6em; letter-spacing: 0.01em; }
code { background: var(--line); padding: 1px 6px; border-radius: 2px; font-size: 0.95em; color: var(--accent2); }

input[type=number], input[type=text] {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--line2);
  color: var(--fg);
  font: inherit; font-size: 16px;
  padding: 12px 14px;
  min-height: 44px;
  margin: 6px 0 12px;
  border-radius: 0;
  -webkit-appearance: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}
input[type=number]:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 2px rgba(110,255,198,0.18); }
input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
input[type=number] { -moz-appearance: textfield; }

/* header */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0;
  background: rgba(6,7,10,0.85);
  backdrop-filter: blur(10px);
  z-index: 50;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo svg { width: 30px; height: 30px; display: block; }
.logo .brand {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--fg);
  text-transform: uppercase;
}
.logo .brand .ai { color: var(--dim2); }

nav { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
nav a {
  font-size: 12px;
  color: var(--dim);
  letter-spacing: 0.06em;
  text-transform: lowercase;
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}
nav a:hover, nav a.active { color: var(--accent); border-bottom-color: var(--accent); }
nav a.cta {
  border: 1px solid var(--line2);
  padding: 8px 14px;
  color: var(--fg);
  background: var(--bg-deep);
}
nav a.cta:hover { border-color: var(--accent); color: var(--accent); }

/* main + reveal */

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 28px 80px;
}

.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: reveal 480ms ease-out forwards;
}
.reveal-1 { animation-delay: 60ms; }
.reveal-2 { animation-delay: 140ms; }
.reveal-3 { animation-delay: 220ms; }
.reveal-4 { animation-delay: 300ms; }

@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}

/* hero */

.hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 36px;
  align-items: center;
  padding: 28px 0 48px;
}
.hero-text h1 {
  background: linear-gradient(180deg, #ffffff 0%, #c5d2e2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lede { color: var(--fg); margin: 14px 0 22px; max-width: 60ch; font-size: 14px; line-height: 1.7; }
.hero .cta { display: flex; gap: 10px; flex-wrap: wrap; }

.hero-art {
  position: relative;
  aspect-ratio: 1;
  display: flex; align-items: center; justify-content: center;
}
.hero-art .ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 1px solid var(--line2);
}
.hero-art .ring.r2 { inset: 30px; border-color: rgba(110,195,255,0.12); }
.hero-art .ring.r3 { inset: 60px; border-color: rgba(110,255,198,0.16); animation: spinSlow 24s linear infinite; }
.hero-art svg { width: 64%; height: 64%; }
.hero-art .pulse {
  position: absolute; inset: 25%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(110,255,198,0.18) 0%, transparent 70%);
  animation: pulseGlow 4.2s ease-in-out infinite;
}

@keyframes spinSlow { to { transform: rotate(360deg); } }
@keyframes pulseGlow {
  0%, 100% { transform: scale(0.92); opacity: 0.55; }
  50%      { transform: scale(1.05); opacity: 1; }
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 18px; }
  .hero-art { max-width: 320px; margin: 0 auto; }
}

/* logo svg pulses */
svg .syn-dot-c { transform-origin: 120px 120px; animation: nodeFire 2.6s ease-in-out infinite; }
svg .syn-dot-l { transform-origin: 80px 120px;  animation: nodeFire 2.6s ease-in-out 0.4s infinite; }
svg .syn-dot-r { transform-origin: 160px 120px; animation: nodeFire 2.6s ease-in-out 0.8s infinite; }
@keyframes nodeFire {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.35; }
}
.logo svg .syn-dot-c, .logo svg .syn-dot-l, .logo svg .syn-dot-r { transform-origin: center; }

/* btns */

.btn {
  display: inline-flex;
  align-items: center; justify-content: center;
  padding: 12px 20px;
  min-height: 44px;
  border: 1px solid var(--line2);
  background: var(--bg-deep);
  color: var(--fg);
  font: inherit; font-size: 13px;
  cursor: pointer;
  border-radius: 0;
  transition: all 160ms ease;
  text-transform: lowercase;
  letter-spacing: 0.04em;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  position: relative;
  overflow: hidden;
}
.btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn.primary {
  background: var(--accent);
  color: #0a0f12;
  border-color: var(--accent);
  font-weight: 500;
  box-shadow: 0 0 0 0 rgba(110,255,198,0.5);
}
.btn.primary:hover { background: #88ffd4; color: #0a0f12; box-shadow: 0 0 24px -4px rgba(110,255,198,0.55); }
.btn.primary:disabled, .btn:disabled { background: var(--line2); color: var(--dim); border-color: var(--line2); cursor: not-allowed; transform: none; box-shadow: none; }
.btn.warn { border-color: var(--warn); color: var(--warn); }
.btn.warn:hover { background: var(--warn); color: #0a0f12; }

/* panels */

.panel {
  border: 1px solid var(--line2);
  background: linear-gradient(180deg, var(--panel), var(--bg-deep));
  padding: 22px 24px;
  margin: 0 0 18px;
  position: relative;
  transition: border-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}
.panel::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(110,255,198,0.35), transparent);
  opacity: 0.4;
}
.panel:hover { border-color: rgba(110,255,198,0.25); }
.panel h3 { margin-top: 0; }

/* stats */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: 24px 0;
  position: relative;
  overflow: hidden;
}
.stat {
  background: var(--bg-deep);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background 200ms ease;
}
.stat:hover { background: var(--bg-soft); }
.stat .k { font-size: 10px; color: var(--dim); text-transform: uppercase; letter-spacing: 0.1em; }
.stat .v { font-size: 20px; color: #fff; font-weight: 300; font-variant-numeric: tabular-nums; }
.stat .v.acc  { color: var(--accent); }
.stat .v.acc2 { color: var(--accent2); }
.stat .v.hot  { color: var(--hot); }

/* prose */

.prose p { margin: 0 0 14px; max-width: 70ch; }
.prose ul { padding-left: 18px; margin: 0 0 18px; max-width: 70ch; }
.prose li { margin: 0 0 6px; }
.prose .lab { color: var(--dim); font-size: 11px; }
.prose strong { color: #fff; font-weight: 500; }

/* row */

.row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
}
.row:last-of-type { border: none; }
.row .lab { color: var(--dim); font-size: 12px; }
.row .val { color: #fff; font-size: 13px; word-break: break-all; max-width: 60%; text-align: right; font-variant-numeric: tabular-nums; }

/* note */

.note { color: var(--dim); font-size: 12px; margin: 10px 0 0; min-height: 1em; }
.note.bad  { color: var(--bad); }
.note.good { color: var(--accent); }
.note.warn { color: var(--warn); }

/* brain weight bars */

.weight-bar {
  display: grid;
  grid-template-columns: 90px 1fr 80px;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}
.weight-bar .name { color: var(--dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; }
.weight-bar .meter { position: relative; height: 10px; background: var(--bg-deep); border: 1px solid var(--line2); overflow: hidden; }
.weight-bar .meter::before {
  content: '';
  position: absolute;
  left: 50%;
  top: -2px; bottom: -2px;
  width: 1px;
  background: var(--line2);
}
.weight-bar .fill  { position: absolute; top: 0; bottom: 0; background: var(--accent); transition: width 240ms ease; box-shadow: 0 0 12px rgba(110,255,198,0.4); }
.weight-bar .fill.neg { background: var(--hot); box-shadow: 0 0 12px rgba(255,110,156,0.4); }
.weight-bar .num { color: var(--fg); font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }

/* obs table */

.obs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
  margin-top: 12px;
}
.obs-table th, .obs-table td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.obs-table th { color: var(--dim); font-weight: normal; text-transform: uppercase; letter-spacing: 0.06em; font-size: 10px; }
.obs-table td { color: var(--fg); font-variant-numeric: tabular-nums; }
.obs-table tr:hover td { background: var(--bg-soft); }

/* training feed */

.feed {
  border: 1px solid var(--line2);
  background: var(--bg-deep);
  padding: 12px 14px;
  font-size: 11px;
  color: var(--fg);
  height: 220px;
  overflow-y: auto;
  margin-top: 12px;
  border-radius: 2px;
}
.feed div { padding: 5px 0; border-bottom: 1px dotted var(--line); animation: slideIn 280ms ease-out; }
.feed .ok  { color: var(--accent); }
.feed .err { color: var(--bad); }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(-6px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* footer */

footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 28px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 11px;
  flex-wrap: wrap;
}
footer a { color: var(--dim); }
footer a:hover { color: var(--accent); }

/* responsive */

@media (max-width: 720px) {
  header { padding: 14px 18px; }
  nav a { font-size: 11px; }
  main { padding: 28px 18px 60px; }
  h1 { font-size: 28px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .logo .brand { display: none; }
}
@media (max-width: 460px) {
  .stats { grid-template-columns: 1fr; }
  .weight-bar { grid-template-columns: 70px 1fr 60px; }
}