/* ============================================================================
   GRAI Clinic — design system
   White + blue, warm-human accents. Shared by index.html (GRAI Clinic home)
   and dental.html (GRAI Dental / Aida). Vanilla CSS, no build step.
   ========================================================================== */

:root{
  /* brand */
  --brand:        #2f6bff;
  --brand-ink:    #1b4dd6;
  --brand-050:    #eef3ff;
  --brand-100:    #dce7ff;
  --violet:       #7b6ef0;   /* the "intelligence" accent */
  --violet-050:   #f1effe;
  --warm:         #ff8a6b;   /* human warmth, used sparingly */
  --warm-050:     #fff2ee;
  --good:         #12b76a;
  --good-050:     #e7f8f0;
  --danger:       #f04438;

  /* ink + surfaces */
  --ink:          #0d1626;
  --ink-2:        #46536b;
  --muted:        #7c8aa1;
  --line:         #e7edf6;
  --line-2:       #eef2f8;
  --bg:           #ffffff;
  --bg-soft:      #f6f9fd;
  --surface:      #ffffff;
  --surface-2:    #f4f7fc;
  --ink-panel:    #0c1424;   /* dark cards */

  /* type */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  --font-serif: "Fraunces", Georgia, "Times New Roman", serif;

  /* geometry */
  --r-sm: 10px;  --r-md: 14px;  --r-lg: 20px;  --r-xl: 28px;
  --shadow-sm: 0 1px 2px rgba(13,22,38,.06), 0 1px 3px rgba(13,22,38,.04);
  --shadow-md: 0 8px 24px rgba(13,22,38,.08), 0 2px 6px rgba(13,22,38,.05);
  --shadow-lg: 0 24px 64px rgba(13,22,38,.12), 0 8px 24px rgba(13,22,38,.07);
  --shadow-brand: 0 16px 40px rgba(47,107,255,.28);

  --maxw: 1160px;
  --nav-h: 68px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} }
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--bg);
  font-size:17px;
  line-height:1.6;
  overflow-x:clip;              /* no horizontal scroll; safe for sticky nav */
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
:focus-visible{outline:2.5px solid var(--brand);outline-offset:2px;border-radius:4px}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:24px}
.section{padding:clamp(56px,8vw,110px) 0}
.section-tight{padding:clamp(40px,5vw,64px) 0}
.center{text-align:center}
.stack-lg > * + *{margin-top:22px}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-ink);
}
.eyebrow.on-dark{color:#9fc0ff}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand)}

h1,h2,h3{margin:0;letter-spacing:-.02em;line-height:1.08;font-weight:700}
h1{font-size:clamp(38px,5.6vw,68px)}
h2{font-size:clamp(29px,3.7vw,46px);line-height:1.12}
h3{font-size:clamp(19px,1.5vw,22px);line-height:1.25}
.serif{font-family:var(--font-serif);font-weight:500;font-style:italic;letter-spacing:-.01em}
.grad-text{background:linear-gradient(105deg,var(--brand),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(17px,1.4vw,20px);color:var(--ink-2);line-height:1.6}
.section-head{max-width:44rem;margin-inline:auto;margin-bottom:clamp(32px,4vw,54px)}
.section-head.left{margin-inline:0;text-align:left}
.muted{color:var(--muted)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:15.5px;font-weight:600;line-height:1;cursor:pointer;
  padding:14px 22px;border-radius:999px;border:1px solid transparent;
  transition:transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{background:var(--brand-ink);box-shadow:0 20px 46px rgba(47,107,255,.34)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:#c9d5e8;background:var(--bg-soft)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#1c2942}
.btn-phone{background:var(--good-050);color:#0a7c4a;border-color:#bfe6d3}
.btn-phone:hover{background:#daf3e6}
.btn-lg{padding:17px 30px;font-size:16.5px}
.btn-block{width:100%}
.btn svg{width:18px;height:18px;flex:none}

.linkarrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand-ink)}
.linkarrow svg{width:16px;height:16px;transition:transform .2s ease}
.linkarrow:hover svg{transform:translateX(3px)}

/* ---------- chips / pills ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13.5px;font-weight:600;color:var(--ink-2);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;
  box-shadow:var(--shadow-sm);
}
.chip svg{width:15px;height:15px;color:var(--good)}
.chip.on-dark{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);color:#cdd7e8}

.tag{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;
  letter-spacing:.04em;text-transform:uppercase;padding:4px 10px;border-radius:999px}
.tag-live{background:var(--good-050);color:#0a7c4a}
.tag-live .pulse{width:7px;height:7px;border-radius:50%;background:var(--good);
  box-shadow:0 0 0 0 rgba(18,183,106,.6);animation:pulse 2s infinite}
.tag-soon{background:var(--surface-2);color:var(--muted)}
@keyframes pulse{70%{box-shadow:0 0 0 7px rgba(18,183,106,0)}100%{box-shadow:0 0 0 0 rgba(18,183,106,0)}}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:60;height:var(--nav-h);
  background:rgba(255,255,255,.72);backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .2s ease, box-shadow .2s ease}
.nav.scrolled{border-color:var(--line);box-shadow:0 1px 0 rgba(13,22,38,.03)}
.nav .wrap{display:flex;align-items:center;gap:22px;height:100%}
.brand{display:flex;flex-direction:column;gap:3px;letter-spacing:-.02em}
.brand-row{display:flex;align-items:center;gap:9px}
.brand-word{font-family:"Fraunces",Georgia,serif;font-weight:700;font-size:25px;letter-spacing:.015em;line-height:1;
  background:linear-gradient(105deg,var(--brand),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.brand .mark{height:22px;width:auto;flex:none}
.brand-tag{font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);line-height:1;white-space:nowrap}
.nav-menu{display:flex;align-items:center;flex:1;min-width:0;gap:22px;margin-left:14px}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:9px 12px;border-radius:8px;font-size:15px;font-weight:500;color:var(--ink-2)}
.nav-links a:hover{color:var(--ink);background:var(--bg-soft)}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-phone{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;color:var(--ink);padding:9px 12px;border-radius:999px}
.nav-phone:hover{background:var(--bg-soft)}
.nav-phone svg{width:16px;height:16px;color:var(--good)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);
  border-radius:10px;width:42px;height:42px;align-items:center;justify-content:center;cursor:pointer}
.nav-toggle svg{width:22px;height:22px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding-top:clamp(40px,6vw,72px);padding-bottom:clamp(48px,7vw,90px)}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(760px 440px at 84% -6%, rgba(47,107,255,.12), transparent 62%),
    radial-gradient(680px 420px at 6% 4%, rgba(123,110,240,.10), transparent 60%),
    radial-gradient(600px 360px at 60% 108%, rgba(255,138,107,.08), transparent 60%),
    var(--bg);
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,56px);align-items:center}
.hero h1{margin-top:20px}
.hero .lead{margin-top:22px;max-width:34rem}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-note{display:flex;align-items:center;gap:14px;margin-top:22px;color:var(--muted);font-size:13.5px;flex-wrap:wrap}
.hero-note .who{display:flex}
.hero-note .who img{width:30px;height:30px;border-radius:50%;border:2px solid #fff;margin-left:-8px;box-shadow:var(--shadow-sm)}
.hero-note .who img:first-child{margin-left:0}

/* ---------- avatars ---------- */
.avatar{border-radius:50%;object-fit:cover;background:var(--surface-2);flex:none}
.avatar-32{width:32px;height:32px}
.avatar-40{width:40px;height:40px}
.avatar-44{width:44px;height:44px}

/* Aida — honest AI assistant avatar (branded, not a fake human, not a robot emoji).
   :not(.msg) so the avatar styles never leak onto the .msg.aida chat bubbles. */
.aida:not(.msg){position:relative;border-radius:50%;flex:none;
  background:conic-gradient(from 210deg, var(--brand), var(--violet), var(--brand));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(47,107,255,.32)}
.aida-40{width:40px;height:40px}
.aida-56{width:56px;height:56px}
.aida .bars{display:flex;align-items:center;gap:2.5px;height:44%}
.aida .bars i{width:2.5px;height:100%;border-radius:2px;background:rgba(255,255,255,.95);
  transform-origin:center;animation:eq 1s ease-in-out infinite}
.aida .bars i:nth-child(1){animation-delay:0s}
.aida .bars i:nth-child(2){animation-delay:.18s}
.aida .bars i:nth-child(3){animation-delay:.36s}
.aida .bars i:nth-child(4){animation-delay:.12s}
.aida.is-quiet .bars i{animation-play-state:paused;height:38%}
@keyframes eq{0%,100%{transform:scaleY(.4)}50%{transform:scaleY(1)}}
@media (prefers-reduced-motion: reduce){.aida .bars i{animation:none;height:60%}}

/* ---------- generic cards ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-md)}
.card-pad{padding:clamp(20px,2.4vw,30px)}
.grid{display:grid;gap:20px}
.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{padding:26px;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;
  box-shadow:var(--shadow-sm);transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease}
.feature:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--brand-100)}
.feature .ic{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-050);color:var(--brand-ink);margin-bottom:16px}
.feature .ic svg{width:23px;height:23px}
.feature.violet .ic{background:var(--violet-050);color:var(--violet)}
.feature.warm .ic{background:var(--warm-050);color:#e2593a}
.feature.good .ic{background:var(--good-050);color:#0a7c4a}
.feature h3{margin-bottom:8px}
.feature p{margin:0;color:var(--ink-2);font-size:15.5px}

/* ---------- stat strip ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.stats .cell{background:#fff;padding:26px 22px;text-align:center}
.stats .v{font-size:clamp(28px,3vw,40px);font-weight:800;letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;background:linear-gradient(120deg,var(--brand),var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.stats .l{margin-top:6px;font-size:13.5px;color:var(--muted);line-height:1.4}

/* ---------- phone / call UI (used in hero + demo) ---------- */
.callcard{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);
  box-shadow:var(--shadow-lg);overflow:hidden;display:flex;flex-direction:column}
.callcard-head{display:flex;align-items:center;gap:12px;padding:16px 18px;
  border-bottom:1px solid var(--line-2);background:linear-gradient(180deg,#fbfdff,#fff)}
.callcard-head .aida{margin-right:2px}
.callcard-head .who{min-width:0}
.callcard-head .nm{font-weight:700;font-size:15px;display:flex;align-items:center;gap:7px}
.callcard-head .sub{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.callcard-head .live{margin-left:auto;display:inline-flex;align-items:center;gap:7px;font-size:12px;
  font-weight:700;color:#0a7c4a;background:var(--good-050);padding:5px 11px;border-radius:999px;flex:none}
.callcard-head .live .pulse{width:7px;height:7px;border-radius:50%;background:var(--good);animation:pulse 2s infinite}

.transcript{padding:18px;display:flex;flex-direction:column;gap:12px;overflow:auto;flex:1;scroll-behavior:smooth}
.transcript::-webkit-scrollbar{width:6px}
.transcript::-webkit-scrollbar-thumb{background:#dde5f0;border-radius:6px}
.msg{display:flex;gap:10px;align-items:flex-end;max-width:88%;
  animation:msgIn .45s cubic-bezier(.2,.7,.3,1) both}
.msg .b{padding:10px 14px;border-radius:16px;font-size:14.5px;line-height:1.5}
.msg.caller{align-self:flex-end;flex-direction:row-reverse}
.msg.caller .b{background:var(--brand);color:#fff;border-bottom-right-radius:5px}
.msg.aida .b{background:var(--surface-2);color:var(--ink);border-bottom-left-radius:5px;border:1px solid var(--line-2)}
.msg .who-name{font-size:10px;font-weight:700;letter-spacing:.03em;color:var(--violet);margin-bottom:3px;text-transform:uppercase}
.msg .who-pic{width:26px;height:26px;border-radius:50%;object-fit:cover;flex:none;margin-bottom:2px}
.sysline{align-self:center;display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  color:#0a7c4a;background:var(--good-050);border:1px solid #cdeeda;border-radius:999px;padding:6px 14px;
  animation:msgIn .45s cubic-bezier(.2,.7,.3,1) both}
.sysline svg{width:14px;height:14px}
.sysline.think{color:var(--violet);background:var(--violet-050);border-color:#e2ddfb}
@keyframes msgIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion: reduce){.msg,.sysline{animation:none}}

/* JS-orchestrated "call playing" — messages reveal in sequence inside the
   fixed-height transcript (page never reflows). No .js class = all visible. */
.demo.js .demo-panel .msg,
.demo.js .demo-panel .sysline{opacity:0;animation:none}
.demo.js .demo-panel .msg.is-shown,
.demo.js .demo-panel .sysline.is-shown{opacity:1;animation:msgIn .45s cubic-bezier(.2,.7,.3,1) both}

/* live waveform footer */
.callcard-foot{display:flex;align-items:center;gap:14px;padding:13px 18px;border-top:1px solid var(--line-2);background:#fff}
.wave{display:flex;align-items:center;gap:3px;height:26px;flex:1}
.wave i{width:3px;border-radius:3px;background:linear-gradient(var(--brand),var(--violet));
  height:30%;animation:wv 1.1s ease-in-out infinite}
.wave i:nth-child(odd){animation-duration:.9s}
.wave i:nth-child(3n){animation-duration:1.3s}
@keyframes wv{0%,100%{height:22%}50%{height:96%}}
@media (prefers-reduced-motion: reduce){.wave i{animation:none;height:50%}}
.callcard-foot .timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:13px;color:var(--muted)}
.callcard-foot .end{width:38px;height:38px;border-radius:50%;background:var(--danger);display:flex;
  align-items:center;justify-content:center;flex:none}
.callcard-foot .end svg{width:18px;height:18px;color:#fff}

/* ---------- diary / PMS panel ---------- */
.diary{background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--shadow-md);
  padding:18px;display:flex;flex-direction:column}
.diary-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.diary-head .t{font-weight:700;font-size:14.5px;display:flex;align-items:center;gap:8px}
.diary-head .src{font-size:11.5px;color:var(--muted);font-weight:600;background:var(--surface-2);
  padding:4px 9px;border-radius:8px}
.slots{display:flex;flex-direction:column;gap:9px;overflow:auto;flex:1}
.slot{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);
  border-left:3px solid var(--brand);border-radius:12px;padding:11px 13px;font-size:14px;transition:all .4s ease}
.slot .tm{font-weight:700;color:var(--ink-2);font-variant-numeric:tabular-nums;flex:none;width:44px}
.slot .nm{font-weight:600}
.slot .rt{color:var(--muted);font-size:12.5px;margin-left:auto;text-align:right}
.slot.empty{border-left-color:#d7dfec;border-style:dashed;color:var(--muted);background:var(--bg-soft)}
.slot.cancelled{border-left-color:var(--danger);opacity:.5}
.slot.cancelled .nm{text-decoration:line-through}
.slot.new{border-left-color:var(--violet);
  background:linear-gradient(90deg,rgba(123,110,240,.12),#fff 62%);
  box-shadow:0 0 0 1px rgba(123,110,240,.18)}
.slot .badge{font-size:10px;font-weight:700;letter-spacing:.02em;padding:3px 8px;border-radius:7px;
  background:rgba(123,110,240,.14);color:#5a4bd6;flex:none}
.slot.pop{animation:slotPop .5s cubic-bezier(.2,.8,.3,1) both}
@keyframes slotPop{from{opacity:0;transform:translateX(10px)}to{opacity:1;transform:none}}

/* ---------- the DEMO module (fixed height, never jumps) ---------- */
.demo{background:linear-gradient(180deg,#fff,var(--bg-soft));border:1px solid var(--line);
  border-radius:var(--r-xl);box-shadow:var(--shadow-md);padding:clamp(18px,2.2vw,26px)}
.demo-tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;margin-bottom:20px;scrollbar-width:none}
.demo-tabs::-webkit-scrollbar{display:none}
.demo-tab{flex:none;display:inline-flex;align-items:center;gap:9px;padding:11px 16px;border-radius:999px;
  border:1px solid var(--line);background:#fff;color:var(--ink-2);font-weight:600;font-size:14px;cursor:pointer;
  transition:all .18s ease}
.demo-tab .n{width:22px;height:22px;border-radius:50%;background:var(--surface-2);color:var(--muted);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;flex:none}
.demo-tab:hover{border-color:#c9d5e8}
.demo-tab[aria-selected="true"]{background:var(--ink);color:#fff;border-color:var(--ink)}
.demo-tab[aria-selected="true"] .n{background:rgba(255,255,255,.2);color:#fff}

.demo-stage{position:relative;min-height:560px}
.demo-panel{display:none;grid-template-columns:1.02fr .98fr;gap:20px;min-height:560px}
.demo-panel.is-active{display:grid}
.demo-panel .callcard{height:560px}
.demo-panel .diary{height:560px}
.demo-caption{display:flex;align-items:flex-start;gap:12px;margin-top:18px;padding:14px 18px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm)}
.demo-caption .ic{width:34px;height:34px;border-radius:9px;background:var(--brand-050);color:var(--brand-ink);
  display:flex;align-items:center;justify-content:center;flex:none}
.demo-caption .ic svg{width:18px;height:18px}
.demo-caption p{margin:0;font-size:14.5px;color:var(--ink-2)}
.demo-caption b{color:var(--ink)}

.demo-cta{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:22px;padding:20px 24px;border-radius:var(--r-lg);
  background:linear-gradient(120deg,var(--ink-panel),#16233d);color:#fff}
.demo-cta .lbl{font-weight:700;font-size:18px}
.demo-cta .sub{color:#9fb0c9;font-size:14px;margin-top:3px}
.demo-cta .num{font-family:var(--font-serif);font-style:normal;font-weight:600;font-size:22px;letter-spacing:.02em}

/* ---------- comparison table ---------- */
.compare{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;background:#fff;box-shadow:var(--shadow-md)}
.compare th,.compare td{padding:16px 18px;text-align:left;font-size:15px;border-bottom:1px solid var(--line-2)}
.compare thead th{background:var(--bg-soft);font-size:13px;color:var(--muted);font-weight:700;
  text-transform:uppercase;letter-spacing:.05em}
.compare thead th.us{background:var(--brand);color:#fff;text-transform:none;font-size:15px;letter-spacing:0}
.compare tbody tr:last-child td{border-bottom:0}
.compare td.us{background:var(--brand-050)}
.compare .feat{font-weight:600;color:var(--ink)}
.compare .yes{color:var(--good);font-weight:700;display:inline-flex;align-items:center;gap:7px}
.compare .no{color:var(--muted);display:inline-flex;align-items:center;gap:7px}
.compare .yes svg,.compare .no svg{width:17px;height:17px;flex:none}
.compare small{display:block;color:var(--muted);font-weight:400;font-size:12.5px;margin-top:2px}
.compare-hint{display:none}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:step}
.step{position:relative;padding:28px 24px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:#fff;box-shadow:var(--shadow-sm)}
.step .no{width:38px;height:38px;border-radius:12px;background:var(--ink);color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;font-size:16px;margin-bottom:16px}
.step h3{margin-bottom:8px}
.step p{margin:0;color:var(--ink-2);font-size:15px}
.step .time{display:inline-block;margin-top:14px;font-size:12.5px;font-weight:700;color:var(--brand-ink);
  background:var(--brand-050);padding:5px 11px;border-radius:999px}

/* ---------- dark / trust card ---------- */
.dark{background:
    radial-gradient(700px 380px at 88% -20%, rgba(47,107,255,.22), transparent 60%),
    radial-gradient(600px 360px at 0% 120%, rgba(123,110,240,.20), transparent 60%),
    var(--ink-panel);
  color:#eaf0fb;border-radius:var(--r-xl);padding:clamp(30px,4vw,56px);overflow:hidden;position:relative}
.dark h2{color:#fff}
.dark .lead{color:#adbbd2}
.trust-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:30px}
.trust-item{display:flex;gap:14px;padding:18px;border-radius:var(--r-md);
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09)}
.trust-item .ic{width:42px;height:42px;border-radius:11px;flex:none;display:flex;align-items:center;justify-content:center;
  background:rgba(47,107,255,.16);color:#9fc0ff}
.trust-item .ic svg{width:21px;height:21px}
.trust-item h3{color:#fff;font-size:16px;margin-bottom:5px}
.trust-item p{margin:0;font-size:14px;color:#a7b5cd;line-height:1.5}

/* dark two-column split (e.g. dental spotlight) — collapses on mobile */
.dark-split{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(24px,4vw,48px);align-items:center}
@media (max-width: 860px){.dark-split{grid-template-columns:1fr}}

/* ---------- specialities (home) ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.spec{position:relative;padding:24px;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;
  box-shadow:var(--shadow-sm);transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  display:flex;flex-direction:column;min-height:180px}
.spec.live{border-color:var(--brand-100);box-shadow:var(--shadow-md)}
.spec.live:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.spec .ic{width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--surface-2);margin-bottom:16px}
.spec.live .ic{background:var(--brand-050);color:var(--brand-ink)}
.spec .ic svg{width:25px;height:25px}
.spec h3{font-size:18px;margin-bottom:5px}
.spec p{margin:0;font-size:14px;color:var(--muted)}
.spec .tag{position:absolute;top:18px;right:18px}
.spec .go{margin-top:auto;padding-top:14px}

/* ---------- testimonial ---------- */
.quote{max-width:52rem;margin-inline:auto;text-align:center}
.quote blockquote{margin:0;font-family:var(--font-serif);font-style:italic;font-weight:500;
  font-size:clamp(22px,2.6vw,32px);line-height:1.34;color:var(--ink);letter-spacing:-.01em}
.quote blockquote b{font-style:normal;color:var(--brand-ink);background:linear-gradient(transparent 62%,var(--brand-050) 0)}
.quote .by{display:inline-flex;align-items:center;gap:12px;margin-top:26px}
.quote .by img{width:48px;height:48px;border-radius:50%;object-fit:cover}
.quote .by .who{text-align:left}
.quote .by .who .n{font-weight:700}
.quote .by .who .r{font-size:13.5px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq{max-width:48rem;margin-inline:auto}
.faq details{border:1px solid var(--line);border-radius:var(--r-md);background:#fff;margin-bottom:12px;
  box-shadow:var(--shadow-sm);overflow:hidden}
.faq summary{list-style:none;cursor:pointer;padding:20px 22px;font-weight:600;font-size:16.5px;
  display:flex;align-items:center;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pm{width:24px;height:24px;flex:none;position:relative;transition:transform .2s ease}
.faq summary .pm::before,.faq summary .pm::after{content:"";position:absolute;background:var(--brand);
  border-radius:2px;top:50%;left:50%;transform:translate(-50%,-50%)}
.faq summary .pm::before{width:14px;height:2px}
.faq summary .pm::after{width:2px;height:14px;transition:transform .2s ease}
.faq details[open] summary .pm::after{transform:translate(-50%,-50%) scaleY(0)}
.faq details[open] summary{color:var(--brand-ink)}
.faq .ans{padding:0 22px 22px;color:var(--ink-2);font-size:15.5px;line-height:1.6}
.faq .ans p{margin:0}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:var(--r-xl);padding:clamp(36px,5vw,68px);text-align:center;
  background:
    radial-gradient(600px 320px at 82% -20%, rgba(123,110,240,.30), transparent 60%),
    radial-gradient(600px 320px at 10% 120%, rgba(255,138,107,.18), transparent 60%),
    linear-gradient(120deg,var(--brand),var(--brand-ink))}
.cta-band h2{color:#fff}
.cta-band p{color:#dbe6ff;max-width:36rem;margin:16px auto 0}
.cta-band .btn-primary{background:#fff;color:var(--brand-ink);box-shadow:0 16px 40px rgba(8,20,50,.28)}
.cta-band .btn-primary:hover{background:#f2f6ff}
.cta-band .btn-ghost{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.34)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.18)}
.cta-band .row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:30px}

/* ---------- ROI mini-calculator ---------- */
.roi{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--r-xl);
  overflow:hidden;box-shadow:var(--shadow-md);background:#fff}
.roi .inputs{padding:clamp(24px,3vw,38px);display:flex;flex-direction:column}
.roi .field{margin-bottom:28px}
.roi .field:last-of-type{margin-bottom:16px}
.roi label{display:flex;justify-content:space-between;align-items:center;gap:14px;
  font-weight:600;font-size:14.5px;margin-bottom:15px;color:var(--ink-2)}
.roi label b{color:var(--brand-ink);font-variant-numeric:tabular-nums;font-size:15px;
  background:var(--brand-050);border:1px solid var(--brand-100);border-radius:999px;
  padding:3px 12px;white-space:nowrap}

/* custom range slider — filled track + white knob with a brand ring */
.roi input[type=range]{-webkit-appearance:none;appearance:none;display:block;width:100%;height:8px;
  border-radius:999px;cursor:pointer;margin:6px 0;
  background:linear-gradient(var(--brand),var(--brand)) 0/var(--fill,50%) 100% no-repeat, var(--line-2)}
.roi input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:22px;height:22px;
  border-radius:50%;background:#fff;border:none;box-shadow:0 0 0 4px var(--brand),0 2px 6px rgba(13,22,38,.28);
  transition:transform .12s ease}
.roi input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:none;
  box-shadow:0 0 0 4px var(--brand),0 2px 6px rgba(13,22,38,.28)}
.roi input[type=range]::-moz-range-track{background:transparent;height:8px;border-radius:999px}
.roi input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.08)}
.roi input[type=range]:active::-webkit-slider-thumb{transform:scale(1.16)}
.roi input[type=range]:focus-visible{outline:2px solid var(--brand);outline-offset:6px}

.roi .result{padding:clamp(24px,3vw,38px);color:#fff;display:flex;flex-direction:column;justify-content:center;
  background:radial-gradient(500px 300px at 80% 0%, rgba(123,110,240,.35),transparent 60%),var(--ink-panel)}
.roi .result .k{font-size:13px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:#9fb6d8}
.roi .result .big{display:flex;align-items:baseline;gap:8px;
  font-size:clamp(40px,6vw,60px);font-weight:800;letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;color:#fff;margin:10px 0 6px;line-height:1}
.roi .result .big.pos{color:#7ee7b0;text-shadow:0 0 30px rgba(126,231,176,.28)}
.roi .result .big .per{font-size:.34em;font-weight:700;letter-spacing:0;color:#8fe8b8;text-shadow:none;opacity:.92}
.roi .result .sub{color:#a7b8d3;font-size:14px;line-height:1.55}
.roi .result .brk{margin-top:22px;border-top:1px solid rgba(255,255,255,.12);padding-top:16px;display:flex;flex-direction:column;gap:9px}
.roi .result .brk div{display:flex;justify-content:space-between;gap:12px;font-size:14px;color:#cdd8ea}
.roi .result .brk b{color:#fff;font-variant-numeric:tabular-nums}

/* ---------- footer ---------- */
.foot{background:var(--ink-panel);color:#9fb0c9;padding:60px 0 34px;margin-top:0}
.foot a{color:#c3cfe2}
.foot a:hover{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.09)}
.foot .brand{color:#fff;font-size:19px}
.foot .brand-tag{color:#8593ad}
.foot .brand .mark{filter:brightness(1.35) saturate(1.05)}
.foot .about{margin-top:16px;font-size:14px;max-width:26rem;line-height:1.6}
.foot h4{color:#fff;font-size:13px;letter-spacing:.05em;text-transform:uppercase;margin:0 0 14px}
.foot ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;font-size:14.5px}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding-top:22px;font-size:13px;color:#7e8ca6}
.foot-bottom .chips{gap:8px}

/* ---------- reveal on scroll (opacity only — never shifts layout) ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- responsive ---------- */
@media (max-width: 940px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:-1;max-width:460px;margin-inline:auto}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .spec-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .demo-panel,.demo-panel.is-active{grid-template-columns:1fr}
  .demo-stage,.demo-panel{min-height:0}
  .demo-panel .diary{height:auto;min-height:280px}
  /* mobile demo: the call card flows in the page instead of being a tall
     fixed box with a hidden inner scrollbar — no inner auto-scroll fighting
     the page, the whole conversation is simply visible and fades in place */
  .demo-panel .callcard{height:auto}
  .demo-panel .transcript{overflow:visible}
  /* scenario tabs wrap so all five are visible at once — no hidden h-scroll */
  .demo-tabs{flex-wrap:wrap;overflow:visible;gap:8px;padding-bottom:0}
  .demo-tab{flex:1 1 auto;justify-content:center}
  .roi{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:24px}
}
@media (max-width: 640px){
  body{font-size:16px}
  .wrap{padding-inline:16px}
  .section{padding:clamp(44px,9vw,64px) 0}

  /* nav → hamburger menu holding both the links and the CTAs */
  .nav .wrap{gap:10px}
  .nav-toggle{display:flex}
  .nav-menu{display:none}
  .nav.menu-open .nav-menu{display:flex;flex-direction:column;align-items:stretch;gap:6px;margin-left:0;
    position:absolute;top:var(--nav-h);left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
    padding:14px 16px 20px;box-shadow:var(--shadow-md);max-height:calc(100dvh - var(--nav-h));overflow-y:auto}
  .nav.menu-open .nav-links{flex-direction:column;align-items:stretch;gap:2px}
  .nav.menu-open .nav-links a{padding:13px 12px;font-size:16px;border-radius:10px}
  .nav.menu-open .nav-cta{margin-left:0;flex-direction:column;align-items:stretch;gap:10px;
    margin-top:8px;padding-top:14px;border-top:1px solid var(--line-2)}
  .nav.menu-open .nav-cta .btn{width:100%;padding:14px}
  .nav.menu-open .nav-phone{display:inline-flex;justify-content:center;background:var(--bg-soft)}
  .brand-tag{font-size:9.5px;letter-spacing:.16em}

  /* one column everywhere it was multi-column */
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .spec-grid{grid-template-columns:1fr}
  .trust-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr}

  /* CTAs full-width for easy thumb targets */
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .cta-band .row{flex-direction:column}
  .cta-band .row .btn{width:100%}
  .demo-cta{flex-direction:column;align-items:stretch}
  .demo-cta .btn{width:100%}

  /* comparison table → stacked cards on phones (no horizontal scrolling —
     each feature is a card; GRAI and the two competitors read as labelled rows) */
  .compare-hint{display:none}
  .compare-scroll{overflow:visible}
  .compare{min-width:0;border:0;border-radius:0;box-shadow:none;background:transparent}
  .compare thead{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
    clip:rect(0,0,0,0);white-space:nowrap;border:0}
  .compare tbody,.compare tr,.compare td{display:block;width:auto}
  .compare tr{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--shadow-sm);margin-bottom:14px;overflow:hidden}
  .compare tbody tr:last-child{margin-bottom:0}
  .compare td{padding:12px 15px;border:0;border-top:1px solid var(--line-2);font-size:14.5px}
  .compare td.feat{border-top:0;background:var(--bg-soft);font-weight:700;font-size:15.5px;
    color:var(--ink);padding:13px 15px}
  /* each competitor cell: uppercase label (from data-label) left, verdict right */
  .compare td:not(.feat){display:flex;gap:12px;align-items:flex-start;justify-content:space-between}
  .compare td:not(.feat)::before{content:attr(data-label);flex:0 0 auto;padding-top:1px;
    font-weight:600;font-size:12px;letter-spacing:.03em;text-transform:uppercase;color:var(--muted)}
  .compare td.us{background:var(--brand-050)}
  .compare td.us::before{color:var(--brand-ink)}
  .compare td:not(.feat) .yes,
  .compare td:not(.feat) .no{flex:1 1 auto;justify-content:flex-end;flex-wrap:wrap;text-align:right}
  .compare td:not(.feat) small{flex-basis:100%;text-align:right;margin-top:3px}

  /* demo scenario tabs: slightly tighter pills so all five wrap neatly */
  .demo-tab{padding:10px 13px;font-size:13.5px}
}