/* =============================================================
   FluxChat — public site design system
   Aesthetic: local-first dev-tool. Deep near-black, purple aurora,
   fine grid + grain, terminal/window motifs, monospace technical accents.
   No external runtime dependencies. System font stack only.
   ============================================================= */

:root {
  /* Brand */
  --accent:        #6B46C1;
  --accent-bright: #9F7AEA;
  --accent-deep:   #7C5BD6;
  --accent-soft:   rgba(159, 122, 234, 0.14);
  --accent-line:   rgba(159, 122, 234, 0.30);

  /* Surfaces */
  --bg:            #0A0A0F;
  --bg-2:          #0D0D14;
  --panel:         #111119;
  --panel-2:       #15151f;
  --panel-line:    rgba(255, 255, 255, 0.07);
  --panel-line-2:  rgba(255, 255, 255, 0.04);

  /* Text */
  --ink:           #ECECF2;
  --ink-dim:       #A6A6B5;
  --ink-faint:     #6E6E80;

  /* Semantic */
  --ok:            #34D399;
  --warn:          #FBBF24;
  --err:           #F87171;

  /* Type */
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
          system-ui, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", "JetBrains Mono",
          "Consolas", "Liberation Mono", Menlo, monospace;

  /* Geometry */
  --r:    14px;
  --r-sm: 9px;
  --r-lg: 22px;
  --maxw: 1140px;

  --shadow:    0 24px 70px -32px rgba(0, 0, 0, 0.85);
  --shadow-acc: 0 22px 60px -28px rgba(108, 70, 193, 0.55);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition-duration: 0.001ms !important;
  }
  /* Ensure entrance-animated content is fully visible without animation */
  .reveal { opacity: 1 !important; transform: none !important; }
  .cursor-blink { opacity: 1 !important; }
}
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
  letter-spacing: 0.1px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ---------- atmosphere: aurora + grid + grain ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(820px 520px at 78% -8%, rgba(124, 91, 214, 0.30), transparent 60%),
    radial-gradient(680px 480px at 6% 4%, rgba(107, 70, 193, 0.20), transparent 62%),
    radial-gradient(900px 700px at 50% 112%, rgba(159, 122, 234, 0.12), transparent 60%);
  pointer-events: none;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 78%);
  pointer-events: none;
}
.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.45;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 92px 0; position: relative; }
.section--tight { padding: 56px 0; }
main { display: block; }

/* ---------- type ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  font-weight: 680;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: #fff;
}
h1 { font-size: clamp(2.5rem, 6.2vw, 4.3rem); }
h2 { font-size: clamp(1.85rem, 3.6vw, 2.7rem); letter-spacing: -0.025em; }
h3 { font-size: 1.22rem; letter-spacing: -0.015em; }
p { margin: 0 0 1em; color: var(--ink-dim); }
a { color: var(--accent-bright); text-decoration: none; }
a:hover { color: #c4adf5; }
strong { color: var(--ink); font-weight: 650; }
code, .mono { font-family: var(--mono); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent-bright);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  padding: 6px 13px;
  border-radius: 999px;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-bright);
  box-shadow: 0 0 10px var(--accent-bright);
}
.lead { font-size: 1.18rem; color: var(--ink-dim); max-width: 46ch; }
.muted { color: var(--ink-faint); }
.center { text-align: center; }
.gradient-text {
  background: linear-gradient(100deg, #fff 12%, var(--accent-bright) 64%, var(--accent-deep) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- header / nav ---------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(10, 10, 15, 0.72);
  border-bottom: 1px solid var(--panel-line-2);
}
.nav { display: flex; align-items: center; gap: 22px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 700; color: #fff; letter-spacing: -0.02em; font-size: 1.06rem; }
.brand:hover { color: #fff; }
.brand .glyph { width: 30px; height: 30px; display: block; flex: 0 0 auto; }
.nav-links { display: flex; gap: 4px; margin-left: 14px; }
.nav-links a {
  color: var(--ink-dim); font-size: 0.92rem; font-weight: 500;
  padding: 8px 13px; border-radius: 8px; transition: color .16s, background .16s;
}
.nav-links a:hover { color: var(--ink); background: rgba(255,255,255,0.04); }
.nav-links a[aria-current="page"] { color: #fff; background: var(--accent-soft); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; }

/* ---------- buttons ---------- */
.btn {
  --b: var(--panel);
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--sans); font-size: 0.94rem; font-weight: 600;
  padding: 11px 20px; border-radius: 11px; cursor: pointer;
  border: 1px solid var(--panel-line); background: var(--b); color: var(--ink);
  transition: transform .14s ease, border-color .16s, background .16s, box-shadow .16s;
  white-space: nowrap; text-decoration: none;
}
.btn:hover { color: #fff; border-color: var(--accent-line); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; }
.btn--ghost { background: transparent; }
.btn--sm { padding: 8px 14px; font-size: 0.86rem; border-radius: 9px; }
.btn--lg { padding: 14px 26px; font-size: 1rem; border-radius: 13px; }
.btn--block { width: 100%; }
.btn--primary {
  background: linear-gradient(180deg, var(--accent-bright), var(--accent-deep));
  border-color: transparent; color: #fff;
  box-shadow: 0 10px 30px -10px rgba(124, 91, 214, 0.7), inset 0 1px 0 rgba(255,255,255,0.25);
}
.btn--primary:hover {
  color: #fff;
  box-shadow: 0 16px 40px -12px rgba(124, 91, 214, 0.85), inset 0 1px 0 rgba(255,255,255,0.3);
}
.btn .ico { width: 18px; height: 18px; flex: 0 0 auto; }

/* ---------- cards / panels ---------- */
.panel {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--panel-line);
  border-radius: var(--r);
  box-shadow: var(--shadow);
}
.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-2));
  border: 1px solid var(--panel-line);
  border-radius: var(--r);
  padding: 26px;
  position: relative;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.card:hover { border-color: var(--accent-line); transform: translateY(-3px); box-shadow: var(--shadow-acc); }
.card .ic {
  width: 44px; height: 44px; border-radius: 11px;
  display: grid; place-items: center; margin-bottom: 16px;
  background: var(--accent-soft); border: 1px solid var(--accent-line);
}
.card .ic svg { width: 22px; height: 22px; }
.card h3 { margin-bottom: 7px; }
.card p { margin: 0; font-size: 0.95rem; }

/* ---------- window / terminal motif ---------- */
.window {
  border: 1px solid var(--panel-line);
  border-radius: var(--r);
  background: linear-gradient(180deg, #0f0f17, #0b0b11);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.window-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--panel-line);
  background: rgba(255,255,255,0.015);
}
.window-bar .dots { display: flex; gap: 7px; }
.window-bar .dots i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.window-bar .dots i:nth-child(1){ background:#ff5f57; }
.window-bar .dots i:nth-child(2){ background:#febc2e; }
.window-bar .dots i:nth-child(3){ background:#28c840; }
.window-bar .title {
  font-family: var(--mono); font-size: 0.76rem; color: var(--ink-faint);
  margin-left: 6px; display: inline-flex; align-items: center; gap: 7px;
}
.window-body { padding: 20px; font-family: var(--mono); font-size: 0.86rem; }

/* chat preview */
.chat-line { display: flex; gap: 11px; margin-bottom: 16px; align-items: flex-start; }
.chat-line .av {
  width: 26px; height: 26px; border-radius: 7px; flex: 0 0 auto;
  display: grid; place-items: center; font-size: 11px; font-weight: 700;
  font-family: var(--sans);
}
.chat-line.user .av { background: #20202c; color: var(--ink-dim); border: 1px solid var(--panel-line); }
.chat-line.ai .av { background: linear-gradient(180deg, var(--accent-bright), var(--accent-deep)); color:#fff; }
.chat-line .body { flex: 1; }
.chat-line .who { font-size: 0.7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 3px; font-family: var(--mono); }
.chat-line .text { color: var(--ink); font-size: 0.9rem; line-height: 1.55; }
.tool-call {
  margin-top: 9px; padding: 9px 12px; border-radius: 9px;
  background: rgba(159,122,234,0.07); border: 1px solid var(--accent-line);
  font-size: 0.8rem; color: var(--accent-bright);
}
.tool-call .ok { color: var(--ok); }
.cursor-blink { display:inline-block; width:8px; height:1.05em; vertical-align:-2px; background: var(--accent-bright); margin-left:2px; animation: blink 1.05s steps(2) infinite; }
@keyframes blink { 0%,50%{opacity:1} 50.01%,100%{opacity:0} }

/* ---------- grids ---------- */
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- feature list with marks ---------- */
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li { display: flex; gap: 11px; align-items: flex-start; color: var(--ink-dim); font-size: 0.96rem; }
.checks li svg { width: 19px; height: 19px; flex: 0 0 auto; margin-top: 2px; color: var(--accent-bright); }
.checks li.no svg { color: var(--ink-faint); }
.checks li.no { color: var(--ink-faint); }

/* ---------- hero ---------- */
.hero { padding: 86px 0 64px; position: relative; }
.hero .eyebrow { margin-bottom: 22px; }
.hero h1 { max-width: 16ch; }
.hero .lead { max-width: 52ch; font-size: 1.24rem; margin-top: 6px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
.hero-meta { display: flex; gap: 22px; flex-wrap: wrap; margin-top: 30px; color: var(--ink-faint); font-size: 0.86rem; font-family: var(--mono); }
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }

/* ---------- comparison table ---------- */
.compare { width: 100%; border-collapse: separate; border-spacing: 0; }
.compare th, .compare td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--panel-line-2); }
.compare thead th { font-size: 0.78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); font-family: var(--mono); font-weight: 600; }
.compare td:first-child { color: var(--ink); font-weight: 500; }
.compare .col-cloud { color: var(--ink-dim); }
.compare tbody tr:hover { background: rgba(255,255,255,0.015); }
.yes { color: var(--ok); font-weight: 600; }
.soon { color: var(--accent-bright); font-weight: 600; }

/* ---------- steps ---------- */
.steps { counter-reset: s; display: grid; gap: 18px; }
.step { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start; }
.step .n {
  counter-increment: s; width: 42px; height: 42px; border-radius: 11px;
  display: grid; place-items: center; font-family: var(--mono); font-weight: 700;
  background: var(--accent-soft); border: 1px solid var(--accent-line); color: var(--accent-bright);
}
.step .n::before { content: counter(s, decimal-leading-zero); }
.step h3 { margin-bottom: 4px; }
.step p { margin: 0; font-size: 0.95rem; }

/* ---------- pricing ---------- */
.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: stretch; }
.plan { padding: 32px; display: flex; flex-direction: column; }
.plan--free { border-color: var(--accent-line); box-shadow: var(--shadow-acc); }
.plan .ribbon {
  position: absolute; top: 18px; right: 18px;
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent-bright); background: var(--accent-soft); border: 1px solid var(--accent-line);
  padding: 5px 11px; border-radius: 999px;
}
.plan .price { font-size: 3rem; font-weight: 700; color: #fff; letter-spacing: -0.03em; margin: 8px 0 2px; }
.plan .price small { font-size: 1rem; color: var(--ink-faint); font-weight: 500; }
.plan .price-soon { font-size: 1.6rem; font-weight: 700; color: var(--accent-bright); margin: 10px 0 2px; letter-spacing: -0.02em; }
.plan .checks { margin: 22px 0 26px; flex: 1; }
.plan h3 { font-size: 1.4rem; }

/* ---------- auth ---------- */
.auth-shell { min-height: calc(100vh - 68px); display: grid; place-items: center; padding: 48px 24px 72px; }
.auth-card { width: 100%; max-width: 432px; padding: 34px; }
.auth-card h1 { font-size: 1.9rem; margin-bottom: 6px; }
.auth-card .sub { color: var(--ink-dim); font-size: 0.96rem; margin-bottom: 26px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--ink-dim); margin-bottom: 7px; letter-spacing: .01em; }
.field input {
  width: 100%; padding: 12px 14px; border-radius: 10px;
  background: var(--bg-2); border: 1px solid var(--panel-line); color: var(--ink);
  font-family: var(--sans); font-size: 0.96rem; transition: border-color .16s, box-shadow .16s;
}
.field input::placeholder { color: var(--ink-faint); }
.field input:focus { outline: none; border-color: var(--accent-bright); box-shadow: 0 0 0 3px var(--accent-soft); }
.field .hint { font-size: 0.78rem; color: var(--ink-faint); margin-top: 6px; }
.auth-foot { margin-top: 22px; text-align: center; font-size: 0.9rem; color: var(--ink-dim); }
.form-msg {
  display: none; margin-bottom: 18px; padding: 12px 14px; border-radius: 10px;
  font-size: 0.88rem; line-height: 1.45; border: 1px solid transparent;
}
.form-msg.show { display: block; }
.form-msg.err { background: rgba(248,113,113,0.08); border-color: rgba(248,113,113,0.3); color: #fca5a5; }
.form-msg.ok { background: rgba(52,211,153,0.08); border-color: rgba(52,211,153,0.3); color: #6ee7b7; }
.form-msg.info { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent-bright); }
.spin { display:inline-block; width:15px; height:15px; border:2px solid rgba(255,255,255,.4); border-top-color:#fff; border-radius:50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- dashboard ---------- */
.dash-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 22px; align-items: start; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 9px 16px; font-size: 0.95rem; }
.kv dt { color: var(--ink-faint); font-family: var(--mono); font-size: 0.84rem; }
.kv dd { margin: 0; color: var(--ink); }
.badge { display:inline-flex; align-items:center; gap:7px; font-size:0.78rem; font-weight:600; padding:4px 11px; border-radius:999px; }
.badge--free { background: var(--accent-soft); color: var(--accent-bright); border: 1px solid var(--accent-line); }
.badge--soon { background: rgba(251,191,36,0.08); color: var(--warn); border: 1px solid rgba(251,191,36,0.3); }

/* ---------- callouts ---------- */
.note {
  display: flex; gap: 13px; padding: 16px 18px; border-radius: var(--r-sm);
  background: rgba(251,191,36,0.05); border: 1px solid rgba(251,191,36,0.22);
}
.note svg { width: 20px; height: 20px; flex: 0 0 auto; color: var(--warn); margin-top: 1px; }
.note p { margin: 0; font-size: 0.9rem; color: var(--ink-dim); }
.note strong { color: var(--ink); }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--panel-line-2); padding: 56px 0 40px; margin-top: 40px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.foot-col h4 { font-size: 0.78rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); font-family: var(--mono); font-weight: 600; margin-bottom: 14px; }
.foot-col a { display: block; color: var(--ink-dim); font-size: 0.92rem; padding: 4px 0; }
.foot-col a:hover { color: var(--ink); }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--panel-line-2); color: var(--ink-faint); font-size: 0.84rem; }
.foot-brand p { max-width: 34ch; font-size: 0.9rem; margin-top: 12px; }

/* ---------- legal / prose ---------- */
.prose { max-width: 760px; }
.prose h2 { font-size: 1.5rem; margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose p, .prose li { color: var(--ink-dim); font-size: 0.98rem; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: 0.5em; }
.prose code { background: var(--panel-2); padding: 2px 7px; border-radius: 6px; font-size: 0.88em; color: var(--accent-bright); border: 1px solid var(--panel-line); }
.toc { font-size: 0.86rem; }

/* ---------- 404 ---------- */
.glitch-404 {
  font-family: var(--mono); font-weight: 700; font-size: clamp(5rem, 22vw, 13rem);
  line-height: 0.9; letter-spacing: -0.04em;
  background: linear-gradient(180deg, var(--accent-bright), var(--accent-deep));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- entrance animation ---------- */
.reveal { opacity: 0; transform: translateY(16px); animation: rise .7s cubic-bezier(.2,.7,.2,1) forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }
.d1{animation-delay:.05s}.d2{animation-delay:.13s}.d3{animation-delay:.21s}
.d4{animation-delay:.29s}.d5{animation-delay:.37s}.d6{animation-delay:.45s}

/* ---------- divider ---------- */
.div-line { height: 1px; background: linear-gradient(90deg, transparent, var(--panel-line), transparent); margin: 0; border: 0; }

/* ---------- responsive ---------- */
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  .dash-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .hero { padding: 56px 0 48px; }
  .nav-links { display: none; }
  .nav-toggle {
    display: inline-grid; place-items: center; width: 40px; height: 40px;
    background: var(--panel); border: 1px solid var(--panel-line); border-radius: 10px; cursor: pointer; color: var(--ink);
  }
  .nav.open .nav-links {
    display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0;
    background: rgba(10,10,15,0.97); backdrop-filter: blur(14px); padding: 12px 16px 18px;
    border-bottom: 1px solid var(--panel-line); gap: 2px; margin: 0;
  }
  .nav.open .nav-links a { padding: 12px 14px; }
  .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .foot-grid { grid-template-columns: 1fr; }
  .foot-bottom { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 460px) {
  .wrap { padding: 0 18px; }
  .auth-card, .card, .plan { padding: 22px; }
}