/* ==========================================================================
   Resonance AI Advisory — styles
   Pure white canvas, solid black, navy + space-grey accents.
   Newsreader serif headings, Geist body. Mirrors the Halo marketing craft,
   trimmed and recoloured.
   ========================================================================== */

:root{
  --white:#FFFFFF;
  --black:#000000;
  --navy:#0A0E1A;
  --space-grey:#3A3A3C;
  --ink-2:#000000;       /* body copy is pure black (no grey text) */
  --muted:#000000;       /* no grey text anywhere */
  --hair:#E7E7E7;        /* hairline borders */
  --hair-2:#F1F1F1;      /* faint fills */
  --maxw:1240px;
  --pad:24px;
  --ease:cubic-bezier(0.22,1,0.36,1);
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"Geist",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--white);
  color:var(--black);
  font-family:var(--serif);
  font-size:17px;
  line-height:1.6;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad);}

/* ---------- Type ---------- */
h1,h2,h3,h4{font-family:var(--serif);font-weight:400;letter-spacing:-0.02em;color:var(--black);margin:0;line-height:1.06;}
.display{font-size:clamp(40px,6vw,76px);letter-spacing:-0.035em;line-height:1.02;}
.section-title{font-size:clamp(30px,3.6vw,50px);letter-spacing:-0.03em;}
.feature-title{font-size:clamp(24px,2.4vw,36px);letter-spacing:-0.025em;}
.eyebrow{display:none;}
.lede{font-size:clamp(17px,1.25vw,21px);line-height:1.55;color:var(--ink-2);max-width:72ch;}
.muted{color:var(--muted);}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--sans);font-size:15px;font-weight:500;
  padding:13px 22px;border-radius:9px;
  background:var(--black);color:var(--white);
  border:1px solid var(--black);
  cursor:pointer;transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease),border-color .25s var(--ease);
  white-space:nowrap;
}
.btn:hover{background:var(--navy);border-color:var(--navy);transform:translateY(-1px);}
.btn .arr{transition:transform .25s var(--ease);}
.btn:hover .arr{transform:translateX(3px);}
.btn.ghost{background:transparent;color:var(--black);border:1px solid var(--black);}
.btn.ghost:hover{background:var(--black);color:var(--white);}
.btn.grey{background:var(--space-grey);border-color:var(--space-grey);color:var(--white);}
.btn.grey:hover{background:var(--navy);border-color:var(--navy);}
.btn.sm{padding:6px 13px;font-size:12.5px;border-radius:7px;gap:7px;}

/* ---------- Header (traditional, non-sticky, full-width black) ---------- */
.nav{position:static;width:100%;background:var(--black);color:#fff;border-bottom:1px solid rgba(255,255,255,0.10);}
.nav .inner{
  position:relative;
  width:100%;max-width:none;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:18px clamp(28px,4vw,56px);
}
.wordmark{display:inline-flex;align-items:center;gap:10px;font-family:var(--serif);font-size:20px;letter-spacing:-0.02em;color:var(--black);}
.wordmark .dot{width:11px;height:11px;border-radius:999px;border:2px solid currentColor;display:inline-block;flex:none;}
.wordmark b{font-weight:500;}
.nav .wordmark{color:#fff;}
/* nav links centred in the bar, independent of brand/CTA widths */
.nav-links{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;align-items:center;gap:36px;}
.nav-links a{font-family:var(--sans);font-size:15px;font-weight:450;color:#fff;padding:4px 0;transition:opacity .2s var(--ease);}
.nav-links a:hover{opacity:0.62;}
.nav-links a.active{font-weight:700;text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1.5px;}
/* CTA inverts to white-on-black against the dark bar */
.btn.cta-invert{background:#fff;color:var(--black);border-color:#fff;}
.btn.cta-invert:hover{background:var(--space-grey);color:#fff;border-color:var(--space-grey);transform:translateY(-1px);}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid rgba(255,255,255,0.35);background:transparent;border-radius:8px;cursor:pointer;position:relative;}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:12px;width:18px;height:1.6px;background:#fff;transition:transform .25s var(--ease),opacity .2s var(--ease);}
.nav-toggle span{top:50%;transform:translateY(-50%);}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
body.menu-open .nav-toggle span{background:transparent;}
body.menu-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg);}
body.menu-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg);}

/* mobile overlay */
.mobile-menu{position:fixed;inset:0;z-index:55;background:var(--black);display:flex;flex-direction:column;justify-content:center;gap:6px;padding:0 32px;opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s;}
body.menu-open .mobile-menu{opacity:1;visibility:visible;}
.mobile-menu a{font-family:var(--serif);font-size:34px;letter-spacing:-0.02em;color:#fff;padding:10px 0;}
.mobile-menu .btn{margin-top:24px;align-self:flex-start;font-family:var(--sans);font-size:16px;background:#fff;color:var(--black);border-color:#fff;}

/* ---------- Sections ---------- */
section{padding-block:clamp(32px,3.8vw,60px);}
.divider{height:1px;background:var(--hair);max-width:var(--maxw);margin:0 auto;}
.block-center{max-width:900px;margin:0 auto;text-align:center;}

/* ---------- Hero ---------- */
.hero{padding-top:clamp(24px,3vw,48px);padding-bottom:clamp(40px,5vw,72px);text-align:center;}
.hero .display{max-width:26ch;margin-left:auto;margin-right:auto;}
.hero-tag{margin:0 auto;font-family:var(--serif);font-size:clamp(24px,2.6vw,34px);font-weight:400;letter-spacing:-0.01em;color:#000;max-width:44ch;}
.hero .lede{margin-top:20px;margin-left:auto;margin-right:auto;}
.hero-actions{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap;align-items:center;justify-content:center;}
.hero-note{font-family:var(--mono);font-size:12px;letter-spacing:0.04em;color:var(--space-grey);}

/* ---------- Video slot (Bunny Stream) ---------- */
.video-slot{position:relative;width:100%;max-width:1000px;margin:clamp(40px,6vw,72px) auto 0;border-radius:16px;overflow:hidden;border:1px solid var(--hair);background:var(--hair-2);}
.video-slot iframe{border:0;position:absolute;inset:0;width:100%;height:100%;}
.video-fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:#000;background:repeating-linear-gradient(135deg,#fafafa,#fafafa 14px,#f3f3f3 14px,#f3f3f3 28px);}
.video-fallback .vlabel{font-family:var(--mono);font-size:12px;letter-spacing:0.12em;text-transform:uppercase;}
.video-fallback .vsub{font-size:13px;}

/* ---------- Feature grid / cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:clamp(36px,5vw,56px);}
.card{
  border:1px solid var(--hair);border-radius:14px;padding:26px;background:var(--white);
  display:flex;flex-direction:column;gap:10px;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease),background .3s var(--ease);
}
.card .tag{font-family:var(--mono);font-size:11px;letter-spacing:0.1em;text-transform:uppercase;color:#fff;}
.card h3{font-size:23px;letter-spacing:-0.02em;color:#fff;}
.card p{font-size:15.5px;line-height:1.55;color:#fff;}
/* All cards sit on solid black with white text; grid cards go space-grey on hover */
.card.lead,.grid-3 .card{background:var(--black);border-color:var(--black);}
.card.lead .tag,.grid-3 .card .tag{color:#fff;}
.card.lead h3,.card.lead p,.grid-3 .card h3,.grid-3 .card p{color:#fff;}
.grid-3 .card:hover{background:#fff;border-color:#000;transform:translateY(-3px);box-shadow:0 16px 38px rgba(10,14,26,0.16);}
.grid-3 .card:hover .tag,.grid-3 .card:hover h3,.grid-3 .card:hover p{color:#000;}

/* ---------- Accordion (home service blocks) ---------- */
.accordion{max-width:1080px;margin:clamp(36px,5vw,52px) auto 0;display:flex;flex-direction:column;gap:16px;text-align:left;}
.acc-item{background:var(--black);border:1px solid var(--black);border-radius:14px;overflow:hidden;}
.acc-head{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:26px 32px;background:none;border:0;cursor:pointer;text-align:left;font-family:inherit;color:#fff;}
.acc-title{font-family:var(--serif);font-size:clamp(21px,2.2vw,29px);letter-spacing:-0.02em;color:#fff;}
.acc-arrow{color:#fff;font-size:24px;line-height:1;flex:none;transition:transform .3s var(--ease);}
.acc-item.open .acc-arrow{transform:rotate(90deg);}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .4s var(--ease);}
.acc-item.open .acc-panel{max-height:560px;}
.acc-panel ul{list-style:none;margin:0;padding:2px 32px 30px;display:flex;flex-direction:column;gap:13px;}
.acc-panel li{position:relative;padding-left:22px;color:#fff;font-size:16px;line-height:1.5;}
.acc-panel li::before{content:"";position:absolute;left:3px;top:9px;width:6px;height:6px;border-radius:999px;background:#fff;}

/* services add-on rows */
.addon{display:flex;gap:22px;align-items:flex-start;padding:26px 0;border-top:1px solid var(--hair);}
.addon .ai{font-family:var(--mono);font-size:13px;color:#000;min-width:42px;padding-top:6px;}
.addon h3{font-size:25px;}
.addon p{font-size:16px;color:var(--ink-2);margin-top:8px;}
.addon .pill{display:inline-block;margin-top:12px;font-family:var(--mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:#000;border:1px solid var(--hair);border-radius:999px;padding:5px 11px;}
.addon-note{display:inline-block;margin-top:14px;font-size:14px;letter-spacing:0.01em;color:#000;}

/* generic prose for about/legal */
.prose{max-width:920px;}
.prose h2{font-size:clamp(24px,2.6vw,34px);margin-top:44px;margin-bottom:14px;}
.prose h2:first-child{margin-top:0;}
.prose p{font-size:17px;line-height:1.65;color:var(--ink-2);margin-bottom:1.1em;}
.prose ul{padding-left:20px;margin:0 0 1.1em;}
.prose li{margin-bottom:8px;color:var(--ink-2);}

/* ---------- Booking ---------- */
#book{scroll-margin-top:96px;}
#book .cta-strip{margin-top:0;}
.book-head{max-width:920px;}
.calendly-inline-widget{min-width:320px;height:700px;margin-top:32px;border:1px solid var(--hair);border-radius:16px;overflow:hidden;background:var(--white);}

/* ---------- CTA strip ---------- */
.cta-strip{background:var(--black);border-radius:20px;padding:clamp(36px,5vw,60px);text-align:center;color:var(--white);margin-top:clamp(24px,3.5vw,44px);}
.cta-strip h2{color:var(--white);font-size:clamp(26px,3.2vw,42px);}
.cta-strip p{color:#fff;margin-top:14px;max-width:64ch;margin-left:auto;margin-right:auto;}
.cta-strip .btn{margin-top:26px;background:var(--white);color:var(--black);border-color:var(--white);}
.cta-strip .btn:hover{background:var(--hair-2);color:var(--black);border-color:var(--hair-2);transform:translateY(-1px);}

/* ---------- Footer ---------- */
.foot{background:#000;color:#fff;padding:34px 0;margin-top:0;text-align:center;}
.foot .container{display:flex;flex-direction:column;align-items:center;gap:18px;}
.foot-links{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 28px;}
.foot-links a{font-family:var(--sans);font-size:15px;color:#fff;transition:opacity .2s var(--ease);}
.foot-links a:hover{opacity:0.6;}
.foot-links a.active{font-weight:700;text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1.5px;}
.foot-copy{margin:0;font-size:14px;letter-spacing:0.02em;color:#fff;}

/* ---------- Centred text across all pages ---------- */
.prose{margin-left:auto;margin-right:auto;text-align:center;}
.prose ul{list-style:none;padding-left:0;}
.card{text-align:center;align-items:center;}
.book-head{margin-left:auto;margin-right:auto;text-align:center;}
.addon{flex-direction:column;align-items:center;text-align:center;gap:8px;}
.addon .ai{min-width:0;padding-top:0;}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* ---------- Responsive ---------- */
@media (max-width:860px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:block;}
  .grid-3{grid-template-columns:1fr;}
  .foot .grid{grid-template-columns:1fr 1fr;gap:32px;}
  .foot .brand-col{grid-column:1 / -1;}
}
@media (max-width:520px){
  body{font-size:16px;}
  .foot .grid{grid-template-columns:1fr;}
  .cta-strip{border-radius:16px;}
}