/* IDNexus — base styles. System fonts only: no font requests, no layout shift. */
:root{
  --ink:#0e2a2b;--ink-2:#3b5553;--ink-3:#5d7371;
  --paper:#f4f7f5;--white:#fff;--line:#d5e0dc;--mint:#e3f1ec;
  --teal:#0b6f6a;--teal-d:#085854;--green:#1b7f4b;--green-bg:#e4f4ea;
  --warn:#8a5200;--warn-bg:#fdf1dc;--danger:#b42318;--danger-bg:#fde9e7;
  --serif:Charter,"Iowan Old Style","Palatino Linotype","Book Antiqua",Georgia,serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:10px;--wrap:1120px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;font:400 1rem/1.65 var(--sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}
main{flex:1}
img,svg{display:block;max-width:100%;height:auto}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.15;letter-spacing:-.01em;margin:0 0 .5em;color:var(--ink);text-wrap:balance}
h1{font-size:clamp(2rem,6.2vw,3.4rem);letter-spacing:-.025em}
h2{font-size:clamp(1.55rem,4vw,2.15rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
a{color:var(--teal);text-underline-offset:3px}
a:hover{color:var(--teal-d)}
code{font-family:var(--mono);font-size:.88em;background:var(--mint);padding:.12em .38em;border-radius:5px}
:focus-visible{outline:3px solid #2aa198;outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:12px;top:-60px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;z-index:100}
.skip:focus{top:12px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* buttons — min 44px tap target */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:var(--r);border:1px solid transparent;font:600 .97rem/1 var(--sans);text-decoration:none;cursor:pointer;transition:background-color .15s,border-color .15s,color .15s;-webkit-appearance:none;appearance:none}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-d);color:#fff}
.btn-quiet{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-quiet:hover{background:var(--white);color:var(--ink);border-color:#b9c9c4}
.btn-danger{background:var(--danger-bg);color:var(--danger)}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* forms — 16px inputs stop iOS zoom */
label.field{display:block;font-size:.88rem;font-weight:600;margin:0 0 6px;color:var(--ink)}
.input{width:100%;min-height:48px;padding:12px 14px;border:1px solid #b9c9c4;border-radius:var(--r);background:var(--white);color:var(--ink);font:400 16px/1.3 var(--sans);margin:0 0 16px}
.input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 3px rgba(11,111,106,.2)}
.hint{font-size:.85rem;color:var(--ink-3);margin:-8px 0 16px}
.msg{display:none;margin-top:14px;padding:12px 14px;border-radius:var(--r);font-size:.92rem;line-height:1.5}
.msg.show{display:block}
.msg.error{background:var(--danger-bg);color:var(--danger)}
.msg.success{background:var(--green-bg);color:var(--green)}
.msg.info{background:var(--mint);color:var(--teal-d)}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(244,247,245,.94);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top)}
.bar{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:700 1.25rem/1 var(--serif);letter-spacing:-.02em}
.brand img{width:37px;height:34px}
.brand:hover{color:var(--ink)}
.nav{display:none;gap:4px;margin-left:12px}
.nav a{padding:10px 12px;border-radius:8px;color:var(--ink-2);text-decoration:none;font-weight:500;font-size:.95rem}
.nav a:hover,.nav a[aria-current=page]{color:var(--ink);background:var(--white)}
.bar-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.bar-actions .btn{min-height:42px;padding:0 16px;font-size:.92rem}
.bar-actions .btn-quiet{display:none}
.menu{position:relative}
.menu summary{list-style:none;width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:var(--r);cursor:pointer;background:var(--white)}
.menu summary::-webkit-details-marker{display:none}
.menu-panel{position:absolute;right:0;top:52px;width:min(280px,calc(100vw - 40px));background:var(--white);border:1px solid var(--line);border-radius:12px;padding:8px;box-shadow:0 12px 32px rgba(14,42,43,.14)}
.menu-panel a{display:block;padding:13px 14px;border-radius:8px;color:var(--ink);text-decoration:none;font-weight:500}
.menu-panel a:hover{background:var(--mint)}
@media (min-width:880px){
  .nav{display:flex}.menu{display:none}.bar-actions .btn-quiet{display:inline-flex}
}

/* footer */
.site-footer{background:var(--ink);color:#c5d6d3;padding:48px 0 calc(28px + env(safe-area-inset-bottom));margin-top:64px}
.site-footer a{color:#e8f2f0;text-decoration:none}
.site-footer a:hover{text-decoration:underline;color:#fff}
.foot{display:grid;gap:32px;grid-template-columns:1fr 1fr}
.foot-brand{grid-column:1/-1;max-width:40ch}
.foot-brand .brand{color:#fff;margin-bottom:12px}
.foot-brand p{font-size:.93rem;margin:0}
.foot h4{font:600 .9rem/1.2 var(--sans);color:#fff;margin:0 0 12px;letter-spacing:0}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.foot li a{display:inline-block;padding:6px 0;font-size:.94rem}
.foot-base{margin-top:36px;padding-top:20px;border-top:1px solid #234546;font-size:.85rem;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}
@media (min-width:760px){.foot{grid-template-columns:1.6fr 1fr 1fr 1fr}.foot-brand{grid-column:auto}}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.site-footer,.no-print{display:none!important}body{background:#fff}}
.bar-actions .btn{white-space:nowrap}
@media (max-width:379px){.bar-actions .btn-primary{padding:0 12px;font-size:.85rem}}