/* ============================================================
   Kyle Tankless Pros — styles.css
   Design system: Navy #0B2545 + Orange #F97316 · Sora + Inter
   Mobile-first. Breakpoints: 640 / 768 / 1024 / 1280
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  /* primary (navy) scale */
  --p-50:#EEF3FA; --p-100:#D9E3F1; --p-200:#B3C6E2; --p-300:#8CA8D2;
  --p-400:#5E81B8; --p-500:#3A5F9B; --p-600:#254A80; --p-700:#173763;
  --p-800:#0B2545; --p-900:#061632;
  /* accent (orange) */
  --a-400:#FB923C; --a-500:#F97316; --a-600:#EA580C; --a-700:#C2410C;
  --a-50:#FFF4EC; --a-100:#FFE4D1;
  /* neutrals */
  --dark:#061632; --ink:#0F1B2D; --ink-2:#3B4658; --ink-3:#5F6B7D;
  --off:#F5F7FB; --white:#FFFFFF; --border:#DCE3EE; --border-2:#C7D1E0;
  --ok:#15803D; --warn:#B45309; --danger:#B91C1C;

  --font-head:'Sora',ui-sans-serif,system-ui,sans-serif;
  --font-body:'Inter',ui-sans-serif,system-ui,sans-serif;

  --fs-h1:clamp(2.5rem,1.6rem + 4vw,4.5rem);
  --fs-h2:clamp(2rem,1.5rem + 2vw,3rem);
  --fs-h3:clamp(1.25rem,1.1rem + .6vw,1.5rem);
  --fs-body:clamp(1.0625rem,1rem + .2vw,1.125rem);
  --lh:1.7;
  --measure:68ch;

  --r-card:20px; --r-pill:999px; --r-sm:12px;
  --shadow-1:0 1px 2px rgba(6,22,50,.06),0 2px 6px rgba(6,22,50,.06);
  --shadow-2:0 2px 4px rgba(6,22,50,.06),0 10px 24px -6px rgba(6,22,50,.16);
  --shadow-3:0 4px 8px rgba(6,22,50,.08),0 24px 48px -12px rgba(6,22,50,.28);
  --glow:0 8px 24px -6px rgba(249,115,22,.55);

  --pad-section:64px;
  --container:1200px;
  --gutter:20px;
  --nav-h:72px;
  --bar-h:64px;
}
@media (min-width:768px){:root{--pad-section:88px;--gutter:32px}}
@media (min-width:1024px){:root{--pad-section:112px;--gutter:40px}}

/* ---------- 2. Reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font-family:var(--font-body);font-size:var(--fs-body);line-height:var(--lh);color:var(--ink);background:var(--white);overflow-x:hidden;-webkit-font-smoothing:antialiased}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--p-600);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--a-600)}
h1,h2,h3,h4{font-family:var(--font-head);letter-spacing:-.02em;line-height:1.12;color:var(--ink);margin:0 0 .5em}
h1{font-size:var(--fs-h1);font-weight:800;line-height:1.05}
h2{font-size:var(--fs-h2);font-weight:800}
h3{font-size:var(--fs-h3);font-weight:700;line-height:1.3}
h4{font-size:1.125rem;font-weight:700}
p,ul,ol{margin:0 0 1.1em}
p,li{max-width:var(--measure)}
ul,ol{padding-left:1.3em}
li{margin-bottom:.35em}
strong{font-weight:600}
small,.small{font-size:.875rem}
hr{border:0;border-top:1px solid var(--border);margin:2rem 0}
table{border-collapse:collapse;width:100%}
button{font:inherit}
:focus-visible{outline:3px solid var(--a-500);outline-offset:3px;border-radius:4px}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--dark);color:#fff;padding:12px 18px;border-radius:var(--r-pill);z-index:1000}
.skip-link:focus{left:16px}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- 3. Layout helpers ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:var(--pad-section) 0;position:relative}
.section--off{background:var(--off)}
.section--tint{background:var(--p-50)}
.section--dark{background:var(--dark);color:#DCE6F5}
.section--dark h2,.section--dark h3,.section--dark h4{color:#fff}
.section--dark a{color:var(--a-400)}
.section-head{max-width:760px;margin-bottom:clamp(32px,5vw,56px)}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.section-head--center p,.section-head--center .eyebrow{margin-left:auto;margin-right:auto}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-head);font-size:.75rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--a-600);margin:0 0 14px}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--a-500)}
.section--dark .eyebrow{color:var(--a-400)}
.intro{font-size:1.125rem;color:var(--ink-2);max-width:var(--measure)}
.section--dark .intro{color:#B9C7DD}
.grid{display:grid;gap:20px}
@media (min-width:640px){.grid-2{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.text-center{text-align:center}

/* heat-wave divider (signature) */
.divider{position:absolute;left:0;right:0;height:0;pointer-events:none}
.divider--top{top:0}
.divider--bottom{bottom:0}
.divider svg{position:absolute;left:0;right:0;width:100%;height:56px;display:block;z-index:2}
.divider--top svg{top:-1px}
.divider--bottom svg{bottom:-1px}
#services{padding-top:calc(var(--pad-section) + 40px)}
@media (min-width:1024px){.divider svg{height:84px}}
.wave-rule{width:120px;height:14px;display:block;margin:0 0 18px}
.wave-rule path{stroke:var(--a-500);stroke-width:3;fill:none;stroke-linecap:round}

/* ---------- 4. Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:14px 26px;border-radius:var(--r-pill);font-family:var(--font-head);font-weight:700;font-size:1rem;letter-spacing:-.01em;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;white-space:nowrap}
.btn svg{width:20px;height:20px;flex:none}
.btn--accent{background:var(--a-500);color:#fff;box-shadow:var(--glow)}
.btn--accent:hover{background:var(--a-600);color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px -6px rgba(249,115,22,.65)}
.btn--outline{background:transparent;color:var(--p-800);border-color:var(--p-800)}
.btn--outline:hover{background:var(--p-800);color:#fff}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn--outline-light:hover{background:#fff;color:var(--p-800)}
.btn--lg{min-height:60px;padding:18px 34px;font-size:1.125rem}
.btn--sm{min-height:44px;padding:10px 18px;font-size:.9375rem}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
@media (max-width:639px){.btn-row .btn{width:100%}}

/* ---------- 5. Header / nav ---------- */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--border)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo svg{width:44px;height:44px}
.logo__text{font-family:var(--font-head);font-weight:800;letter-spacing:-.02em;font-size:1.125rem;line-height:1.05}
.logo__text span{display:block;font-family:var(--font-body);font-weight:500;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.nav{display:none}
.header__cta{display:none}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--border);background:#fff;border-radius:14px;color:var(--ink);cursor:pointer}
.nav-toggle svg{width:24px;height:24px}
.nav-toggle .ico-close{display:none}
.nav-toggle[aria-expanded="true"] .ico-open{display:none}
.nav-toggle[aria-expanded="true"] .ico-close{display:block}
.nav-panel{position:fixed;inset:var(--nav-h) 0 0 0;background:var(--white);z-index:99;overflow-y:auto;padding:24px var(--gutter) 120px;transform:translateX(100%);transition:transform .28s ease;visibility:hidden}
.nav-panel.is-open{transform:none;visibility:visible}
.nav-panel ul{list-style:none;padding:0;margin:0}
.nav-panel > ul > li{border-bottom:1px solid var(--border)}
.nav-panel a,.nav-panel summary{display:block;padding:16px 4px;font-family:var(--font-head);font-weight:700;font-size:1.125rem;color:var(--ink);text-decoration:none;cursor:pointer;list-style:none}
.nav-panel summary::-webkit-details-marker{display:none}
.nav-panel details ul{padding:0 0 12px 12px}
.nav-panel details ul a{font-family:var(--font-body);font-weight:500;font-size:1rem;padding:11px 8px;color:var(--ink-2)}
.nav-panel .btn{margin-top:20px;width:100%}
@media (min-width:1024px){
  .nav-toggle,.nav-panel{display:none}
  .nav{display:flex;align-items:center;gap:6px}
  .nav > ul{display:flex;list-style:none;margin:0;padding:0;gap:2px}
  .nav > ul > li{position:relative}
  .nav a,.nav .nav__btn{display:inline-flex;align-items:center;gap:6px;padding:10px 14px;border-radius:var(--r-pill);font-weight:600;font-size:.9375rem;color:var(--ink);text-decoration:none;background:none;border:0;cursor:pointer}
  .nav a:hover,.nav .nav__btn:hover,.nav a[aria-current="page"]{background:var(--p-50);color:var(--p-800)}
  .nav .nav__btn svg{width:16px;height:16px;transition:transform .2s}
  .nav > ul > li:hover .nav__btn svg,.nav > ul > li:focus-within .nav__btn svg{transform:rotate(180deg)}
  .nav .sub{position:absolute;top:calc(100% + 8px);left:0;min-width:260px;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-3);padding:10px;list-style:none;margin:0;opacity:0;visibility:hidden;transform:translateY(6px);transition:all .18s ease}
  .nav .sub--wide{min-width:520px;columns:2;column-gap:6px}
  .nav > ul > li:hover .sub,.nav > ul > li:focus-within .sub{opacity:1;visibility:visible;transform:none}
  .nav .sub a{display:block;padding:10px 12px;border-radius:10px;font-weight:500;font-size:.9375rem;color:var(--ink-2);break-inside:avoid}
  .nav .sub a:hover{background:var(--p-50);color:var(--p-800)}
  .header__cta{display:inline-flex}
}

/* ---------- 6. Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--dark);color:#fff;padding:56px 0 110px;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;z-index:-2;background:
  radial-gradient(60% 60% at 85% 20%,rgba(249,115,22,.45),transparent 60%),
  radial-gradient(50% 55% at 10% 90%,rgba(58,95,155,.7),transparent 60%),
  radial-gradient(40% 40% at 60% 100%,rgba(234,88,12,.25),transparent 60%),
  linear-gradient(160deg,#0B2545 0%,#061632 60%,#0A1E3C 100%)}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;opacity:.11;pointer-events:none;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='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.hero__grid{display:grid;gap:40px;align-items:center}
.hero__eyebrow{display:inline-flex;align-items:center;gap:10px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-pill);padding:8px 14px 8px 8px;font-size:.875rem;font-weight:600;color:#fff;margin-bottom:22px}
.hero__eyebrow .dot{width:26px;height:26px;border-radius:50%;background:var(--a-500);display:inline-flex;align-items:center;justify-content:center}
.hero__eyebrow .dot svg{width:14px;height:14px;color:#fff}
.hero h1{color:#fff;max-width:14ch}
.hero h1 .hl{position:relative;display:inline-block;white-space:nowrap}
.hero h1 .hl::after{content:"";position:absolute;left:0;right:0;bottom:.04em;height:.16em;border-radius:3px;background:var(--a-500);z-index:-1;opacity:.95}
.hero__lead{font-size:1.125rem;color:#C7D3E6;max-width:56ch;margin:18px 0 0}
.hero__phone{display:block;margin-top:6px;font-family:var(--font-head);font-weight:800;font-size:clamp(1.5rem,1.2rem + 1.5vw,2.25rem);color:#fff;text-decoration:none;letter-spacing:-.02em}
.hero__phone:hover{color:var(--a-400)}
.hero__fine{font-size:.8125rem;color:#8FA3C2;margin-top:18px;max-width:52ch}
.trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;padding:0;list-style:none}
.trust li{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-pill);padding:8px 14px;font-size:.875rem;font-weight:500;color:#E3EAF5}
.trust li svg{width:16px;height:16px;color:var(--a-400)}
.hero__art{position:relative;max-width:420px;margin:0 auto}
.hero__art > svg{width:100%;height:auto;filter:drop-shadow(0 30px 40px rgba(0,0,0,.4))}
.glass{display:none}
@media (min-width:768px){
  .hero{padding:80px 0 140px}
  .hero__art{max-width:520px}
  .glass{position:absolute;display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-radius:16px;padding:12px 16px;box-shadow:0 16px 40px -10px rgba(0,0,0,.45);color:#fff;font-size:.875rem;font-weight:600;line-height:1.3}
  .glass small{display:block;font-weight:400;color:#C7D3E6;font-size:.75rem}
  .glass .ico{width:38px;height:38px;border-radius:11px;background:var(--a-500);display:inline-flex;align-items:center;justify-content:center;flex:none}
  .glass .ico svg{width:20px;height:20px;color:#fff}
  .glass--1{top:6%;left:-6%}
  .glass--2{top:44%;right:-8%}
  .glass--3{bottom:2%;left:4%}
}
@media (min-width:1024px){
  .hero{padding:96px 0 168px}
  .hero__grid{grid-template-columns:1.1fr .9fr;gap:56px}
  .hero__art{max-width:none;margin:0}
}

/* ---------- 7. Cards ---------- */
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--shadow-1);padding:28px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;text-decoration:none;color:var(--ink)}
a.card:hover{color:var(--ink)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--border-2)}
.card h3{margin-top:0}
.card p{color:var(--ink-2)}
.ico-sq{width:52px;height:52px;border-radius:14px;background:var(--p-50);color:var(--p-800);display:inline-flex;align-items:center;justify-content:center;margin-bottom:18px}
.ico-sq svg{width:26px;height:26px}
.ico-sq--accent{background:var(--a-50);color:var(--a-600)}
.arrow-link{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-head);font-weight:700;color:var(--p-800);text-decoration:none;margin-top:auto}
.arrow-link svg{width:18px;height:18px;transition:transform .2s}
.arrow-link:hover{color:var(--a-600)}
.arrow-link:hover svg{transform:translateX(4px)}

/* bento */
.bento{display:grid;gap:18px}
.bento .card{display:flex;flex-direction:column}
.bento .card--feature{background:linear-gradient(150deg,var(--p-800),var(--p-900));color:#fff;border-color:transparent;position:relative;overflow:hidden}
.bento .card--feature::after{content:"";position:absolute;right:-60px;bottom:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(249,115,22,.55),transparent 70%)}
.bento .card--feature h3,.bento .card--feature p{color:#fff}
.bento .card--feature p{color:#C7D3E6}
.bento .card--feature .ico-sq{background:rgba(255,255,255,.12);color:#fff}
.bento .card--feature .arrow-link{color:#fff;position:relative;z-index:1}
.bento .card--feature .arrow-link:hover{color:var(--a-400)}
@media (min-width:640px){.bento{grid-template-columns:repeat(2,1fr)}.bento .card--feature{grid-column:span 2}}
@media (min-width:1024px){
  .bento{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(220px,auto)}
  .bento .card--feature{grid-column:span 2;grid-row:span 2}
  .bento .card--wide{grid-column:span 2}
}

/* ---------- 8. Process (numbered) ---------- */
.process{display:grid;gap:28px;position:relative;counter-reset:step}
.step{position:relative;padding-left:0}
.step__num{font-family:var(--font-head);font-weight:800;font-size:4.5rem;line-height:1;color:transparent;-webkit-text-stroke:2px var(--p-200);letter-spacing:-.04em;margin-bottom:6px}
.step h3{margin-top:0}
.step p{color:var(--ink-2)}
@media (min-width:768px){
  .process{grid-template-columns:repeat(2,1fr);gap:36px}
}
@media (min-width:1024px){
  .process{grid-template-columns:repeat(4,1fr)}
  .process::before{content:"";position:absolute;left:4%;right:4%;top:36px;height:2px;background:repeating-linear-gradient(90deg,var(--p-200) 0 10px,transparent 10px 18px)}
  .step__num{position:relative;background:#fff;display:inline-block;padding-right:14px}
  .section--off .step__num,.section--tint .step__num{background:inherit}
}

/* ---------- 9. Symptom checker ---------- */
.symptoms{display:grid;gap:14px}
.symptom{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--border);border-left:4px solid var(--a-500);border-radius:16px;padding:18px 20px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow-1);transition:transform .2s,box-shadow .2s}
.symptom:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);color:var(--ink)}
.symptom .ico-sq{width:44px;height:44px;margin:0;flex:none}
.symptom .ico-sq svg{width:22px;height:22px}
.symptom strong{display:block;font-family:var(--font-head);font-weight:700;margin-bottom:2px}
.symptom span{color:var(--ink-2);font-size:.9375rem}
@media (min-width:640px){.symptoms{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.symptoms{grid-template-columns:repeat(3,1fr)}}

/* ---------- 10. Split sections ---------- */
.split{display:grid;gap:36px;align-items:center}
.split__art{max-width:460px;margin:0 auto}
.split__art svg{width:100%}
@media (min-width:1024px){
  .split{grid-template-columns:1fr 1fr;gap:64px}
  .split__art{max-width:none;margin:0}
  .split--flip .split__art{order:-1}
}

/* ---------- 11. Callouts ---------- */
.callout{display:flex;gap:14px;border-radius:16px;padding:18px 20px;margin:26px 0;border:1px solid var(--border);border-left-width:5px;background:#fff}
.callout svg{width:22px;height:22px;flex:none;margin-top:3px}
.callout p{margin:0;color:var(--ink-2)}
.callout strong{display:block;font-family:var(--font-head);color:var(--ink);margin-bottom:4px}
.callout--tip{border-left-color:var(--ok);background:#F0FDF4}
.callout--tip svg{color:var(--ok)}
.callout--warn{border-left-color:var(--danger);background:#FEF2F2}
.callout--warn svg{color:var(--danger)}
.callout--info{border-left-color:var(--p-500);background:var(--p-50)}
.callout--info svg{color:var(--p-600)}

/* ---------- 12. Tables ---------- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--border);border-radius:16px;background:#fff;margin:22px 0}
.table{min-width:560px}
.table th,.table td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--border);vertical-align:top;font-size:.9375rem}
.table th{font-family:var(--font-head);font-weight:700;background:var(--p-50);color:var(--p-800);white-space:nowrap}
.table tr:last-child td{border-bottom:0}
.table td:first-child{font-weight:600}

/* ---------- 13. CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--dark);color:#fff;text-align:center;padding:var(--pad-section) 0}
.cta-band::before{content:"";position:absolute;left:50%;top:50%;width:720px;height:720px;transform:translate(-50%,-50%);border-radius:50%;background:radial-gradient(circle,rgba(249,115,22,.5),rgba(249,115,22,.08) 45%,transparent 70%);filter:blur(40px);pointer-events:none}
.cta-band .container{position:relative}
.cta-band h2{color:#fff;max-width:18ch;margin:0 auto .5em}
.cta-band p{color:#C7D3E6;margin:0 auto;max-width:54ch}
.cta-band__phone{display:inline-block;margin:22px 0 10px;font-family:var(--font-head);font-weight:800;font-size:clamp(2.25rem,1.5rem + 4vw,4.25rem);letter-spacing:-.03em;color:#fff;text-decoration:none;line-height:1}
.cta-band__phone:hover{color:var(--a-400)}
.cta-band .btn-row{justify-content:center}

/* ---------- 14. FAQ ---------- */
.faq{max-width:820px}
.faq details{border:1px solid var(--border);border-radius:16px;background:#fff;margin-bottom:12px;box-shadow:var(--shadow-1)}
.faq details[open]{border-color:var(--p-200)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;cursor:pointer;font-family:var(--font-head);font-weight:700;font-size:1.0625rem;list-style:none;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary .plus{width:32px;height:32px;flex:none;border-radius:50%;background:var(--p-50);display:inline-flex;align-items:center;justify-content:center;transition:transform .25s ease,background .2s}
.faq summary .plus svg{width:16px;height:16px;color:var(--p-800)}
.faq details[open] summary .plus{transform:rotate(45deg);background:var(--a-500)}
.faq details[open] summary .plus svg{color:#fff}
.faq .faq__body{padding:0 22px 20px;color:var(--ink-2)}
.faq .faq__body p:last-child{margin-bottom:0}

/* ---------- 15. Areas ---------- */
.areas{display:grid;gap:18px}
.area{display:block;background:#fff;border:1px solid var(--border);border-radius:var(--r-card);padding:24px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow-1);transition:transform .2s,box-shadow .2s}
.area:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);color:var(--ink)}
.area h3{display:flex;align-items:center;gap:10px;margin:0 0 8px;font-size:1.125rem}
.area h3 svg{width:20px;height:20px;color:var(--a-500)}
.area p{margin:0;color:var(--ink-2);font-size:.9375rem}
@media (min-width:640px){.areas{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.areas{grid-template-columns:repeat(3,1fr)}}
.chips{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:0}
.chips a{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--border);color:var(--p-800);font-weight:600;font-size:.9rem;text-decoration:none}
.chips a:hover{border-color:var(--a-500);color:var(--a-600)}

/* ---------- 16. Inner pages: page head, breadcrumbs, TOC, sidebar ---------- */
.page-head{background:var(--p-50);padding:36px 0 44px;border-bottom:1px solid var(--border)}
.page-head h1{max-width:20ch}
.page-head .intro{margin-bottom:0}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;list-style:none;padding:0;margin:0 0 18px;font-size:.875rem;color:var(--ink-3)}
.crumbs li+li::before{content:"/";margin:0 6px;color:var(--border-2)}
.crumbs a{color:var(--ink-3);text-decoration:none}
.crumbs a:hover{color:var(--a-600)}
.layout{display:grid;gap:40px}
.content{min-width:0}
.content h2{margin-top:2.2em;scroll-margin-top:calc(var(--nav-h) + 20px)}
.content h2:first-child{margin-top:0}
.content h3{margin-top:1.6em}
.aside{display:grid;gap:22px;align-content:start}
.toc{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px 22px}
.toc h4{margin:0 0 10px;font-size:.8125rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.toc ol{list-style:none;padding:0;margin:0}
.toc li{margin:0}
.toc a{display:block;padding:7px 0 7px 14px;border-left:2px solid var(--border);font-size:.9375rem;color:var(--ink-2);text-decoration:none}
.toc a:hover,.toc a.is-active{border-left-color:var(--a-500);color:var(--p-800);font-weight:600}
.call-card{background:linear-gradient(150deg,var(--p-800),var(--p-900));color:#fff;border-radius:var(--r-card);padding:26px;text-align:center;box-shadow:var(--shadow-3)}
.call-card h4{color:#fff;margin:0 0 6px}
.call-card p{color:#C7D3E6;font-size:.9375rem;margin:0 0 16px}
.call-card .btn{width:100%}
.call-card small{display:block;margin-top:12px;color:#8FA3C2;font-size:.75rem}
@media (min-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr) 320px;gap:64px}
  .aside{position:sticky;top:calc(var(--nav-h) + 24px)}
}
.related{margin-top:48px;padding-top:32px;border-top:1px solid var(--border)}

/* ---------- 17. Footer ---------- */
.footer{background:var(--dark);color:#B9C7DD;padding:64px 0 32px;font-size:.9375rem}
.footer__grid{display:grid;gap:36px}
.footer h4{color:#fff;font-size:.8125rem;letter-spacing:.12em;text-transform:uppercase;margin:0 0 16px}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin-bottom:10px}
.footer a{color:#DCE6F5;text-decoration:none}
.footer a:hover{color:var(--a-400)}
.footer .logo{color:#fff}
.footer .logo__text span{color:#8FA3C2}
.footer__brand p{margin:14px 0 0;max-width:38ch;color:#8FA3C2;font-size:.875rem}
.footer__phone{display:inline-block;margin-top:14px;font-family:var(--font-head);font-weight:800;font-size:1.375rem;color:#fff!important}
.footer__bottom{margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-size:.8125rem;color:#8FA3C2}
.footer__bottom p{max-width:none}
@media (min-width:640px){.footer__grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer__grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}

/* ---------- 18. Sticky mobile call bar ---------- */
.callbar{position:fixed;left:0;right:0;bottom:0;z-index:98;background:var(--dark);padding:10px var(--gutter) calc(10px + env(safe-area-inset-bottom,0px));box-shadow:0 -8px 24px rgba(6,22,50,.25)}
.callbar .btn{width:100%;min-height:48px}
body.has-callbar{padding-bottom:calc(var(--bar-h) + env(safe-area-inset-bottom,0px))}
@media (min-width:1024px){.callbar{display:none}body.has-callbar{padding-bottom:0}}

/* ---------- 19. Motion ---------- */
.fade-up{opacity:1;transform:none}
.js .fade-up{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.js .fade-up.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .fade-up{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
}

/* ---------- 20. Misc ---------- */
.stat-row{display:grid;gap:16px;margin-top:28px}
.stat{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px 20px}
.stat strong{display:block;font-family:var(--font-head);font-size:1.5rem;letter-spacing:-.02em;color:var(--p-800)}
.stat span{color:var(--ink-2);font-size:.9rem}
@media (min-width:640px){.stat-row{grid-template-columns:repeat(3,1fr)}}
.checklist{list-style:none;padding:0}
.checklist li{position:relative;padding-left:32px;margin-bottom:10px}
.checklist li::before{content:"";position:absolute;left:0;top:.35em;width:20px;height:20px;border-radius:6px;background:var(--a-500) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center/12px no-repeat}
.contact-grid{display:grid;gap:20px}
@media (min-width:768px){.contact-grid{grid-template-columns:1fr 1fr}}
.err{text-align:center;padding:96px 0}
.err h1{font-size:clamp(4rem,10vw,8rem);color:var(--p-100);margin:0}