/* ns-base.css — shared design system for Nephrology Specialists, P.C.
   Direction 04: Newsreader serif display + Hanken Grotesk body, brand blue + navy.
   Linked by every inner page (bios, education, utility). The homepage carries its
   own copy inline; keep token + nav + footer values in sync if you edit them. */

:root{
  --brand:#0080c8; --brand-dark:#0a6aa6; --ink:#11242f; --ink-soft:#46586a; --ink-light:#7c8a98;
  --navy:#072d49; --navy-2:#0a3a5e; --line:#e4ecf3; --line-2:#eef4f9;
  --bg:#fbfdfe; --bg-soft:#f1f7fb; --maxw:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:120px;-webkit-text-size-adjust:100%}
body{font-family:'Hanken Grotesk',sans-serif;color:var(--ink);background:var(--bg);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
.serif{font-family:'Newsreader',Georgia,serif}
h1,h2,h3,h4{font-family:'Newsreader',Georgia,serif;font-weight:400;letter-spacing:-0.018em;line-height:1.12;color:var(--ink)}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
::selection{background:#cfe6f6;color:var(--navy)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px}

/* reveal-on-scroll */
.fx-on .fx{opacity:0;transform:translateY(26px);transition:opacity .75s var(--ease),transform .75s var(--ease)}
.fx-on .fx.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.fx-on .fx{opacity:1!important;transform:none!important}}

/* TOPBAR */
.topbar{background:var(--navy);color:rgba(255,255,255,.72);font-size:12.5px;letter-spacing:.01em}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;padding-top:9px;padding-bottom:9px}
.topbar-l,.topbar-r{display:flex;gap:24px;align-items:center;white-space:nowrap;flex-wrap:wrap}
.topbar b{color:#fff;font-weight:600}
.topbar a{color:rgba(255,255,255,.8)}
.topbar a:hover{color:#fff}

/* NAV */
nav.bar{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
nav.bar .wrap{display:flex;align-items:center;justify-content:space-between;height:78px;gap:24px}
.logo{height:42px;width:auto}
.links{display:flex;gap:4px}
.links a{font-size:14.5px;font-weight:500;color:var(--ink-soft);padding:9px 14px;border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}
.links a:hover{color:var(--brand-dark);background:var(--bg-soft)}
.links a.active{color:var(--brand-dark);background:var(--bg-soft)}
.nav-cta{display:flex;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:'Hanken Grotesk',sans-serif;font-size:14px;font-weight:600;border-radius:9px;padding:11px 20px;cursor:pointer;border:1.5px solid transparent;white-space:nowrap;transition:background .2s,box-shadow .2s,color .2s,border-color .2s,transform .15s}
.btn:active{transform:translateY(1px)}
.btn-ghost{color:var(--brand-dark);border-color:#cfe3f1}
.btn-ghost:hover{background:var(--bg-soft)}
.btn-solid{background:var(--brand);color:#fff;box-shadow:0 2px 12px rgba(0,128,200,.28)}
.btn-solid:hover{background:var(--brand-dark)}
.btn-white{background:#fff;color:var(--navy);box-shadow:0 8px 24px rgba(0,0,0,.18)}
.btn-white:hover{background:#eaf4fb}
.btn-outline-w{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn-outline-w:hover{background:rgba(255,255,255,.08)}
.hamburger{display:none;flex-direction:column;gap:5px;padding:8px;border:none;background:none;cursor:pointer;border-radius:7px}
.hamburger span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
.mobile{display:none;flex-direction:column;gap:2px;padding:14px 40px 20px;background:#fff;border-bottom:1px solid var(--line)}
.mobile a{font-size:15px;font-weight:500;color:var(--ink);padding:12px 12px;border-radius:8px}
.mobile a:hover{background:var(--bg-soft);color:var(--brand-dark)}
.mobile .btn{margin-top:6px}
.mobile.open{display:flex}

/* SECTION SCAFFOLD */
section{scroll-margin-top:120px}
.sec{padding:84px 0}
.sec.soft{background:var(--bg-soft)}
.head{margin-bottom:38px;max-width:680px}
.label{display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.label::before{content:"";width:26px;height:2px;background:var(--brand);border-radius:2px}
.sec h2{font-size:36px;letter-spacing:-0.018em}
.sec h2 em{font-style:italic;color:var(--brand)}
.sec .sub{font-size:16px;color:var(--ink-soft);margin-top:11px;line-height:1.6}

/* PAGE HEADER (inner pages) — compact navy-tinted banner */
.pagehead{background:linear-gradient(160deg,var(--bg-soft),#e7f1f9);border-bottom:1px solid var(--line)}
.pagehead .wrap{padding-top:46px;padding-bottom:46px}
.crumb{font-size:13px;color:var(--ink-soft);margin-bottom:16px}
.crumb a{color:var(--ink-soft);font-weight:500}
.crumb a:hover{color:var(--brand-dark)}
.crumb span{color:var(--ink-light);margin:0 8px}
.pagehead h1{font-size:46px;letter-spacing:-0.02em;line-height:1.06}
.pagehead h1 em{font-style:italic;color:var(--brand)}
.pagehead .lede{font-size:17px;color:var(--ink-soft);margin-top:14px;max-width:620px;line-height:1.6}

/* CTA BAND (navy) */
.cta{background:linear-gradient(150deg,var(--navy-2),var(--navy));color:#fff;text-align:center}
.cta .wrap{padding-top:74px;padding-bottom:74px}
.cta .label{color:#9fd0ee;justify-content:center}
.cta .label::before{background:#9fd0ee}
.cta h2{font-size:40px;color:#fff;max-width:760px;margin:0 auto}
.cta h2 em{font-style:italic;color:#7ec8f5}
.cta p{font-size:16px;color:rgba(255,255,255,.74);margin-top:14px}
.cta-btns{display:flex;gap:13px;justify-content:center;margin-top:30px;flex-wrap:wrap}

/* FOOTER */
footer{background:var(--navy);color:rgba(255,255,255,.56);position:relative}
footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(159,208,238,.3),transparent)}
.foot-main{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:44px;padding-top:60px;padding-bottom:40px}
.foot-logo{height:40px;width:auto;margin-bottom:18px;opacity:.95}
.foot-tag{font-size:13.5px;color:rgba(255,255,255,.5);line-height:1.7;max-width:290px;margin-bottom:18px}
.foot-phone{font-family:'Newsreader',serif;font-size:22px;color:#fff}
.foot-phone a{color:#fff}
.foot-col h4{font-family:'Hanken Grotesk',sans-serif;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.42);margin-bottom:16px;font-weight:700}
.foot-col a{display:block;font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:11px;transition:.2s}
.foot-col a:hover{color:#fff}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08)}
.foot-bottom .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;padding-top:18px;padding-bottom:18px;font-size:12.5px;color:rgba(255,255,255,.42)}
.foot-bottom a{color:rgba(255,255,255,.42)}
.foot-bottom a:hover{color:#fff}

/* RESPONSIVE (nav + footer + page header) */
@media(max-width:980px){
  .foot-main{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:760px){
  .wrap{padding:0 22px}
  .topbar{display:none}
  .links,.nav-cta .btn-ghost{display:none}
  .hamburger{display:flex}
  .pagehead h1{font-size:34px}
  .sec h2,.cta h2{font-size:30px}
  .foot-main{grid-template-columns:1fr 1fr}
}