/* =====================================================================
   AIsion — Components: nav, footer, buttons, cards, badges, pills
   ===================================================================== */

/* ---------------- Buttons ---------------- */
.btn {
  --btn-bg: var(--violet-500);
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  font-family: var(--font-body); font-weight: 600; font-size: .98rem;
  padding: .82rem 1.5rem; border-radius: var(--r-pill);
  line-height: 1; letter-spacing: -.01em; white-space: nowrap;
  transition: transform var(--t-fast) var(--ease-out), box-shadow var(--t-med), background var(--t-med), color var(--t-med), border-color var(--t-med);
  position: relative;
}
.btn svg { width: 1.1em; height: 1.1em; }
.btn-primary {
  background: var(--violet-500); color: #fff;
  box-shadow: 0 10px 30px rgba(91,61,245,.34);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 44px rgba(91,61,245,.46); background: var(--violet-400); }
.btn-gradient { background: var(--grad-brand); color:#fff; background-size: 160% 160%; box-shadow: 0 12px 34px rgba(91,61,245,.38); }
.btn-gradient:hover { transform: translateY(-2px); background-position: 100% 0; box-shadow: 0 18px 50px rgba(91,61,245,.5); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line-2); }
.btn-ghost:hover { border-color: var(--violet-400); color: var(--violet-600); transform: translateY(-2px); }
.on-dark .btn-ghost { color: var(--on-dark); border-color: var(--on-dark-line-2); }
.on-dark .btn-ghost:hover { border-color: var(--violet-300); color:#fff; background: rgba(255,255,255,.04); }
.btn-light { background:#fff; color: var(--ink-700); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--sh-lg); }
.btn-sm { padding: .58rem 1.05rem; font-size: .875rem; }
.btn-lg { padding: 1rem 1.9rem; font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn .arrow { transition: transform var(--t-fast) var(--ease-out); }
.btn:hover .arrow { transform: translateX(3px); }

.link-arrow {
  display:inline-flex; align-items:center; gap:.4rem; font-weight:600; color: var(--violet-600);
}
.link-arrow svg { width: 1em; transition: transform var(--t-fast); }
.link-arrow:hover svg { transform: translateX(4px); }
.on-dark .link-arrow { color: var(--cyan-400); }

/* ---------------- Badges / pills ---------------- */
.badge {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono); font-size: .72rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  padding: .42rem .8rem; border-radius: var(--r-pill);
  background: var(--violet-100); color: var(--violet-600);
  border: 1px solid rgba(91,61,245,.16);
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green-500); box-shadow: 0 0 0 3px rgba(16,185,129,.2); }
.on-dark .badge { background: rgba(91,61,245,.16); color: var(--violet-300); border-color: rgba(122,99,248,.3); }

.pill {
  display:inline-flex; align-items:center; gap:.45rem; font-size:.85rem; font-weight:500;
  padding:.42rem .85rem; border-radius: var(--r-pill);
  background: var(--surface); border:1px solid var(--line); color: var(--text-body);
}
.on-dark .pill { background: rgba(255,255,255,.045); border-color: var(--on-dark-line); color: var(--on-dark-body); }

/* ---------------- Cards ---------------- */
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: clamp(1.4rem, 2.4vw, 2rem);
  transition: transform var(--t-med) var(--ease-out), box-shadow var(--t-med), border-color var(--t-med);
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); border-color: rgba(91,61,245,.28); }
.card .card-ic { margin-bottom: 1.15rem; }
.card h3 { font-size: 1.28rem; margin-bottom: .55rem; }
.card p { font-size: .98rem; color: var(--muted); }

.on-dark .card {
  background: rgba(255,255,255,.03); border-color: var(--on-dark-line);
  backdrop-filter: blur(6px);
}
.on-dark .card:hover { border-color: rgba(122,99,248,.5); box-shadow: 0 24px 60px rgba(0,0,0,.5); background: rgba(255,255,255,.05); }
.on-dark .card p { color: var(--on-dark-muted); }

/* glow card variant with gradient top border on hover */
.card-glow::before {
  content:""; position:absolute; inset:0; border-radius: inherit; padding:1px;
  background: var(--grad-brand); opacity:0;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  transition: opacity var(--t-med);
}
.card-glow:hover::before { opacity: 1; }

/* feature icon chip */
.ic-chip {
  width: 56px; height: 56px; border-radius: 15px;
  display: grid; place-items: center;
  background: var(--violet-100); color: var(--violet-600);
  border: 1px solid rgba(91,61,245,.14);
}
.ic-chip svg { width: 26px; height: 26px; }
.on-dark .ic-chip { background: rgba(91,61,245,.16); color: var(--violet-300); border-color: rgba(122,99,248,.3); }
.ic-chip.cyan { background: rgba(32,199,240,.12); color: var(--cyan-500); border-color: rgba(32,199,240,.25); }
.ic-chip.green { background: rgba(16,185,129,.12); color: var(--green-500); border-color: rgba(16,185,129,.25); }
.ic-chip.amber { background: rgba(245,166,35,.12); color: var(--amber-500); border-color: rgba(245,166,35,.25); }

/* stat block */
.stat .num {
  font-family: var(--font-display); font-weight: 700; letter-spacing: -.03em;
  font-size: clamp(2.4rem, 1.8rem + 2.6vw, 3.6rem); line-height: 1;
  background: var(--grad-text-dk); -webkit-background-clip: text; background-clip:text; color: transparent;
}
.on-dark .stat .num { background: var(--grad-text); -webkit-background-clip:text; background-clip:text; }
.stat .lbl { color: var(--muted); font-size: .95rem; margin-top: .5rem; }
.on-dark .stat .lbl { color: var(--on-dark-muted); }

/* checklist */
.check { display:flex; gap:.7rem; align-items:flex-start; }
.check svg { flex:none; width:22px; height:22px; color: var(--green-500); margin-top:.1rem; }
.check span { color: var(--text-body); }
.on-dark .check span { color: var(--on-dark-body); }

/* ---------------- Site header / nav ---------------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background var(--t-med), border-color var(--t-med), backdrop-filter var(--t-med), box-shadow var(--t-med);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(247,248,253,.82);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 24px rgba(14,19,48,.06);
}
/* when scrolled, force the light theme regardless of hero variant */
.nav.on-dark-nav.scrolled { background: rgba(247,248,253,.82); border-bottom-color: var(--line); }
.nav.on-dark-nav.scrolled .brand { color: var(--text); }
.nav.on-dark-nav.scrolled .nav-links a { color: var(--text-body); }
.nav.on-dark-nav.scrolled .nav-links a:hover, .nav.on-dark-nav.scrolled .nav-links a.active { color: var(--violet-600); background: rgba(91,61,245,.07); }
.nav.on-dark-nav.scrolled .nav-toggle { color: var(--text); }
.nav .container { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }

.brand { display:flex; align-items:center; gap:.6rem; font-family: var(--font-display); font-weight: 700; font-size: 1.22rem; letter-spacing:-.02em; color: var(--text); }
.nav.on-dark-nav .brand { color: #fff; }
.brand .logo { width: 34px; height: 34px; }
.brand .by { font-family: var(--font-mono); font-size:.6rem; letter-spacing:.14em; color: var(--faint); display:block; margin-top:-3px; text-transform:uppercase; }

.nav-links { display: flex; align-items: center; gap: .3rem; }
.nav-links a {
  padding: .55rem .85rem; border-radius: var(--r-sm); font-size: .95rem; font-weight: 500;
  color: var(--text-body); transition: color var(--t-fast), background var(--t-fast);
}
.nav-links a:hover, .nav-links a.active { color: var(--violet-600); background: rgba(91,61,245,.07); }
.nav.on-dark-nav .nav-links a { color: var(--on-dark-body); }
.nav.on-dark-nav .nav-links a:hover, .nav.on-dark-nav .nav-links a.active { color:#fff; background: rgba(255,255,255,.08); }

.nav-cta { display:flex; align-items:center; gap:.6rem; }

/* logged-in user chip + dropdown */
.nav-user { position:relative; }
.nav-ava { width:40px; height:40px; border-radius:50%; display:grid; place-items:center; font-family:var(--font-display); font-weight:700; font-size:.85rem; color:#fff; background: var(--grad-brand); cursor:pointer; box-shadow: 0 4px 14px rgba(91,61,245,.4); border:2px solid rgba(255,255,255,.25); }
.nav-menu { position:absolute; right:0; top:calc(100% + 12px); width:250px; background: var(--surface); border:1px solid var(--line); border-radius: var(--r-md); box-shadow: var(--sh-lg); padding:.5rem; opacity:0; visibility:hidden; transform: translateY(-8px); transition: all var(--t-fast) var(--ease-out); }
.nav-user:hover .nav-menu, .nav-user:focus-within .nav-menu { opacity:1; visibility:visible; transform:none; }
.nav-menu-head { padding:.7rem .8rem; border-bottom:1px solid var(--line); margin-bottom:.4rem; }
.nav-menu-head strong { display:block; color: var(--text); font-size:.95rem; }
.nav-menu-head span { color: var(--muted); font-size:.8rem; }
.nav-menu a, .nav-menu button { display:block; width:100%; text-align:left; padding:.6rem .8rem; border-radius: var(--r-sm); font-size:.92rem; color: var(--text-body); transition: background var(--t-fast); }
.nav-menu a:hover, .nav-menu button:hover { background: var(--violet-100); color: var(--violet-700); }
.nav-menu button { color: var(--rose-500); border-top:1px solid var(--line); margin-top:.3rem; }
.nav-toggle { display:none; width:44px; height:44px; border-radius: var(--r-sm); place-items:center; color: var(--text); }
.nav.on-dark-nav .nav-toggle { color:#fff; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content:""; display:block; width:20px; height:2px; background: currentColor; border-radius: 2px; transition: transform .3s var(--ease-out), opacity .2s;
}
.nav-toggle span::before { transform: translateY(-6px); } .nav-toggle span::after { transform: translateY(4px); }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: rotate(45deg); }
body.nav-open .nav-toggle span::after { transform: rotate(-45deg) translateY(-1.5px); }

@media (max-width: 940px) {
  .nav-toggle { display: grid; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: .2rem;
    background: var(--ink-800); padding: 1rem var(--gutter) 1.6rem;
    border-bottom: 1px solid var(--on-dark-line);
    transform: translateY(-140%); transition: transform .4s var(--ease-out);
    max-height: calc(100vh - var(--nav-h)); overflow:auto;
  }
  .nav-links a { color: var(--on-dark-body); padding: .9rem 1rem; font-size:1.05rem; }
  .nav-links a:hover { background: rgba(255,255,255,.06); color:#fff; }
  body.nav-open .nav-links { transform: none; }
  .nav-cta .btn:not(.nav-login) { display:none; }
}

/* ---------------- Footer ---------------- */
.footer { background: var(--ink-800); color: var(--on-dark-body); padding-top: clamp(3.5rem,6vw,5.5rem); position:relative; overflow:hidden; }
.footer::before { content:""; position:absolute; top:0; left:0; right:0; height:1px; background: linear-gradient(90deg, transparent, rgba(122,99,248,.5), transparent); }
.footer-top { display:grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 2.5rem; padding-bottom: 3rem; }
@media (max-width: 860px){ .footer-top { grid-template-columns: 1fr 1fr; } .footer-brand-col { grid-column: 1/-1; } }
@media (max-width: 520px){ .footer-top { grid-template-columns: 1fr; } }
.footer h4 { color:#fff; font-size:.82rem; font-family: var(--font-mono); letter-spacing:.14em; text-transform:uppercase; margin-bottom:1.1rem; font-weight:600; }
.footer ul li { margin-bottom:.6rem; }
.footer ul a { color: var(--on-dark-muted); font-size:.95rem; transition: color var(--t-fast); }
.footer ul a:hover { color:#fff; }
.footer-brand-col p { color: var(--on-dark-muted); max-width: 34ch; font-size:.95rem; margin-top:1rem; }
.footer-bottom { border-top:1px solid var(--on-dark-line); padding: 1.6rem 0; display:flex; justify-content:space-between; align-items:center; gap:1rem; flex-wrap:wrap; }
.footer-bottom p { color: var(--on-dark-muted); font-size:.85rem; }
.footer-social { display:flex; gap:.6rem; }
.footer-social a { width:38px; height:38px; border-radius:10px; display:grid; place-items:center; border:1px solid var(--on-dark-line); color: var(--on-dark-muted); transition: all var(--t-fast); }
.footer-social a:hover { color:#fff; border-color: var(--violet-400); transform: translateY(-2px); }

/* ---------------- Marquee / logo strip ---------------- */
.marquee { overflow:hidden; -webkit-mask: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display:flex; gap:3.5rem; width:max-content; animation: marquee 32s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.marquee-track span { font-family: var(--font-display); font-weight:600; color: var(--faint); font-size:1.05rem; white-space:nowrap; display:flex; align-items:center; gap:.6rem; }

/* ---------------- Divider glow ---------------- */
.hr-glow { height:1px; border:0; background: linear-gradient(90deg, transparent, var(--line-2), transparent); margin-block: 0; }
.on-dark .hr-glow { background: linear-gradient(90deg, transparent, var(--on-dark-line-2), transparent); }

/* ---------------- Toast (auth feedback) ---------------- */
.toast-wrap { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 300; display:flex; flex-direction:column; gap:.6rem; }
.toast { background: var(--ink-700); color:#fff; padding:.85rem 1.2rem; border-radius: var(--r-md); box-shadow: var(--sh-lg); border:1px solid var(--on-dark-line); display:flex; align-items:center; gap:.6rem; font-size:.92rem; animation: toastin .4s var(--ease-out); }
.toast.err { border-color: rgba(244,63,127,.5); }
.toast.ok { border-color: rgba(16,185,129,.5); }
@keyframes toastin { from { opacity:0; transform: translateY(16px);} }