/* nu.css — original neumorphism / soft-UI system. Class prefix: nu-
   Monochrome soft NL-blue + one accent. Light + dark. WCAG-safe text/controls.
   Built from scratch; no borrowed tokens, class names, or layout. */

/* ---- tokens -------------------------------------------------------------- */
:root {
  --nu-bg: #e4ebf2;            /* soft blue-grey base */
  --nu-surface: #e4ebf2;       /* surfaces share the base (neumorphism) */
  --nu-hi: #ffffff;            /* light shadow */
  --nu-lo: #c1ccd8;            /* dark shadow */
  --nu-text: #23303f;          /* ~11:1 on --nu-bg */
  --nu-text-soft: #45566a;     /* ~6:1 on --nu-bg */
  --nu-accent: #1550c4;        /* deep NL-blue accent, ~5.3:1 on bg */
  --nu-accent-ink: #ffffff;    /* text on accent */
  --nu-accent-deep: #0f3d99;
  --nu-ok: #1c7a44;
  --nu-line: #cfd8e2;
  --nu-radius: 18px;
  --nu-radius-sm: 12px;
  --nu-gap: clamp(1rem, 2.5vw, 1.6rem);
  --nu-maxw: 1080px;
  --nu-d1: -6px -6px 14px var(--nu-hi), 6px 6px 14px var(--nu-lo);      /* raised */
  --nu-d2: -3px -3px 8px var(--nu-hi), 3px 3px 8px var(--nu-lo);       /* raised sm */
  --nu-inset: inset -4px -4px 9px var(--nu-hi), inset 4px 4px 9px var(--nu-lo); /* pressed */
  --nu-font: "Tahoma", "Geneva Sans", "Verdana Ref", sans-serif;
}
:root[data-theme="dark"], html[data-theme="dark"] {
  --nu-bg: #2a323c;
  --nu-surface: #2a323c;
  --nu-hi: #333d49;
  --nu-lo: #1d232b;
  --nu-text: #eaeff5;
  --nu-text-soft: #b3c0cf;
  --nu-accent: #6ea6ff;        /* lighter accent for dark bg contrast */
  --nu-accent-ink: #0e1620;
  --nu-accent-deep: #9cc2ff;
  --nu-ok: #58d38c;
  --nu-line: #3a4553;
  --nu-d1: -6px -6px 14px var(--nu-hi), 6px 6px 14px var(--nu-lo);
  --nu-d2: -3px -3px 8px var(--nu-hi), 3px 3px 8px var(--nu-lo);
  --nu-inset: inset -4px -4px 9px var(--nu-hi), inset 4px 4px 9px var(--nu-lo);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --nu-bg: #2a323c; --nu-surface: #2a323c; --nu-hi: #333d49; --nu-lo: #1d232b;
    --nu-text: #eaeff5; --nu-text-soft: #b3c0cf; --nu-accent: #6ea6ff;
    --nu-accent-ink: #0e1620; --nu-accent-deep: #9cc2ff; --nu-ok: #58d38c; --nu-line: #3a4553;
  }
}

/* ---- base ---------------------------------------------------------------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  font-family: var(--nu-font);
  background: var(--nu-bg);
  color: var(--nu-text);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--nu-accent-deep); text-underline-offset: 2px; }
a:hover { color: var(--nu-accent); }
:focus-visible { outline: 3px solid var(--nu-accent); outline-offset: 2px; border-radius: 6px; }
code { font-family: "Consolas", "Menlo", monospace; background: rgba(21,80,196,.09); padding: .1em .35em; border-radius: 6px; font-size: .92em; }
:root[data-theme="dark"] code, html[data-theme="dark"] code { background: rgba(110,166,255,.16); }

.nu-skip { position: absolute; left: -999px; top: 0; background: var(--nu-accent); color: var(--nu-accent-ink); padding: .7rem 1rem; border-radius: 0 0 10px 0; z-index: 100; }
.nu-skip:focus { left: 0; }

.nu-container { width: 100%; max-width: var(--nu-maxw); margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem); }
.nu-main { padding: clamp(1.4rem, 4vw, 2.6rem) 0 3rem; }

/* ---- header -------------------------------------------------------------- */
.nu-top { position: sticky; top: 0; z-index: 40; background: var(--nu-bg); }
.nu-top-in { max-width: var(--nu-maxw); margin: 0 auto; padding: .7rem clamp(1rem, 4vw, 2rem); display: flex; align-items: center; gap: 1rem; }
.nu-brand { display: inline-flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--nu-text); font-weight: 700; }
.nu-brand-name { font-size: 1.05rem; letter-spacing: .2px; }
.nu-brand-name b { color: var(--nu-accent); }
.nu-logo { flex: 0 0 auto; border-radius: 10px; box-shadow: var(--nu-d2); }
.nu-nav { margin-left: auto; display: flex; align-items: center; gap: .3rem; flex-wrap: wrap; }
.nu-nav a { text-decoration: none; color: var(--nu-text-soft); font-weight: 600; font-size: .92rem; padding: .5rem .7rem; border-radius: 10px; }
.nu-nav a:hover { color: var(--nu-text); box-shadow: var(--nu-d2); }
.nu-nav a.nu-nav-on { color: var(--nu-accent); box-shadow: var(--nu-inset); }
.nu-menu-btn { display: none; }

.nu-theme { margin-left: .3rem; width: 40px; height: 40px; border: 0; background: var(--nu-bg); color: var(--nu-text); border-radius: 12px; box-shadow: var(--nu-d2); cursor: pointer; display: inline-grid; place-items: center; }
.nu-theme:active { box-shadow: var(--nu-inset); }
.nu-theme-ico { width: 18px; height: 18px; border-radius: 50%; background: radial-gradient(circle at 30% 30%, var(--nu-accent), var(--nu-accent-deep)); box-shadow: inset -3px -3px 4px rgba(0,0,0,.2); }

/* ---- headings / lead ----------------------------------------------------- */
.nu-lead { margin: 0 0 1.4rem; }
.nu-h1 { font-size: clamp(1.75rem, 4.5vw, 2.6rem); line-height: 1.18; margin: .2rem 0 .6rem; letter-spacing: -.3px; }
.nu-lead-p { font-size: clamp(1.02rem, 2.2vw, 1.18rem); color: var(--nu-text-soft); max-width: 62ch; margin: .3rem 0 1rem; }
.nu-accent-txt { color: var(--nu-accent); }
.nu-h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); margin: 0 0 .8rem; line-height: 1.25; letter-spacing: -.2px; }
.nu-h2-kick { display: inline-block; font-size: .62em; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--nu-accent-ink); background: var(--nu-accent); padding: .18em .6em; border-radius: 999px; margin-right: .5rem; vertical-align: middle; }
.nu-prose h2 { margin-top: 1.6rem; }
.nu-prose p, .nu-prose ul { margin: .7rem 0; }

/* ---- soft blocks --------------------------------------------------------- */
.nu-block { background: var(--nu-surface); border-radius: var(--nu-radius); box-shadow: var(--nu-d1); padding: clamp(1.1rem, 3vw, 1.8rem); margin: 0 0 var(--nu-gap); }
.nu-block-sunken { box-shadow: var(--nu-inset); }
.nu-list { padding-left: 1.15rem; margin: .6rem 0; }
.nu-list li { margin: .35rem 0; }
.nu-mini { font-size: .92rem; color: var(--nu-text-soft); }
.nu-flag { color: #9a3b00; background: rgba(255,170,0,.14); padding: .05em .4em; border-radius: 6px; font-size: .85em; }
:root[data-theme="dark"] .nu-flag, html[data-theme="dark"] .nu-flag { color: #ffcf8a; }

.nu-callout { background: var(--nu-bg); border-radius: var(--nu-radius-sm); box-shadow: var(--nu-inset); padding: 1rem 1.15rem; margin: 1rem 0; }
.nu-callout-h { display: block; font-weight: 700; color: var(--nu-accent); margin-bottom: .3rem; }

/* ---- crumbs -------------------------------------------------------------- */
.nu-crumbs { font-size: .85rem; color: var(--nu-text-soft); margin: 0 0 1rem; display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; }
.nu-crumbs a { text-decoration: none; color: var(--nu-text-soft); }
.nu-crumbs a:hover { color: var(--nu-accent); }
.nu-crumb-sep { opacity: .6; }
.nu-crumbs [aria-current="page"] { color: var(--nu-text); font-weight: 600; }

/* ---- the embossed key code unit ----------------------------------------- */
.nu-keypad { display: grid; gap: .9rem; }
.nu-keypad-label { font-weight: 700; color: var(--nu-text-soft); font-size: .9rem; text-transform: uppercase; letter-spacing: 1px; }
.nu-keypad-row { display: flex; flex-wrap: wrap; gap: .9rem; align-items: stretch; }
.nu-emboss {
  flex: 1 1 220px;
  min-height: 68px;            /* fixed box -> zero CLS on rotation swap */
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(1.25rem, 4vw, 1.9rem); font-weight: 700; letter-spacing: .5px;
  color: var(--nu-accent);
  background: var(--nu-bg); border-radius: 16px; box-shadow: var(--nu-inset);
  padding: .5rem 1rem; word-break: break-all; text-align: center;
}
.nu-key { border: 0; cursor: pointer; font-family: inherit; font-weight: 700; text-decoration: none; border-radius: 16px; transition: box-shadow .12s ease, transform .12s ease; }
@media (prefers-reduced-motion: reduce) { .nu-key { transition: none; } }
.nu-key-copy {
  flex: 0 0 auto; min-height: 68px; min-width: 160px; padding: 0 1.4rem;
  font-size: 1.05rem; color: var(--nu-accent-ink);
  background: var(--nu-accent); box-shadow: var(--nu-d1);
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
}
.nu-key-copy:hover { box-shadow: var(--nu-d2); }
.nu-key-copy:active { box-shadow: var(--nu-inset); transform: translateY(1px); }
.nu-key-copy.is-done { background: var(--nu-ok); }
.nu-key-order {
  display: flex; flex-direction: column; align-items: flex-start; gap: .15rem;
  padding: .95rem 1.3rem; color: var(--nu-text); background: var(--nu-surface);
  box-shadow: var(--nu-d1); font-size: 1.05rem;
}
.nu-key-order:hover { box-shadow: var(--nu-d2); color: var(--nu-accent); }
.nu-key-order:active { box-shadow: var(--nu-inset); transform: translateY(1px); }
.nu-key-order-sub { font-size: .78rem; font-weight: 500; color: var(--nu-text-soft); }
.nu-keypad-foot { font-size: .9rem; color: var(--nu-text-soft); margin: 0; display: flex; flex-wrap: wrap; gap: .3rem .8rem; align-items: center; }
.nu-shortlink { font-weight: 700; }
.nu-rotates { font-size: .8rem; opacity: .85; }

/* ---- verified / byline / disclosure -------------------------------------- */
.nu-verified { display: inline-flex; align-items: center; gap: .5rem; font-size: .88rem; color: var(--nu-text-soft); background: var(--nu-bg); box-shadow: var(--nu-inset); padding: .45rem .9rem; border-radius: 999px; }
.nu-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--nu-ok); box-shadow: 0 0 0 3px rgba(28,122,68,.18); }
.nu-byline { font-size: .92rem; color: var(--nu-text-soft); margin: .2rem 0 .6rem; }
.nu-author { color: var(--nu-text); font-weight: 700; }
.nu-disclose { background: var(--nu-surface); border-radius: var(--nu-radius-sm); box-shadow: var(--nu-d2); padding: .9rem 1.1rem; font-size: .92rem; color: var(--nu-text-soft); margin: 0 0 var(--nu-gap); }
.nu-disclose strong { color: var(--nu-text); }

/* ---- table --------------------------------------------------------------- */
.nu-tablewrap { overflow-x: auto; border-radius: var(--nu-radius-sm); }
.nu-table { width: 100%; border-collapse: collapse; min-width: 460px; }
.nu-cap { text-align: left; font-size: .82rem; color: var(--nu-text-soft); padding: .3rem 0 .7rem; caption-side: top; }
.nu-table th, .nu-table td { text-align: left; padding: .7rem .8rem; border-bottom: 1px solid var(--nu-line); vertical-align: top; }
.nu-table thead th { color: var(--nu-text-soft); font-size: .82rem; text-transform: uppercase; letter-spacing: .5px; }
.nu-table tbody th { font-weight: 700; }

/* ---- steps --------------------------------------------------------------- */
.nu-steps { list-style: none; counter-reset: none; padding: 0; margin: .5rem 0; display: grid; gap: .8rem; }
.nu-step { display: flex; gap: .9rem; align-items: flex-start; }
.nu-step-n { flex: 0 0 auto; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; font-weight: 700; color: var(--nu-accent); background: var(--nu-bg); box-shadow: var(--nu-inset); }
.nu-step p { margin: .15rem 0 0; color: var(--nu-text-soft); }

/* ---- faq (details) ------------------------------------------------------- */
.nu-faq { display: grid; gap: .7rem; }
.nu-faq-item { background: var(--nu-bg); border-radius: var(--nu-radius-sm); box-shadow: var(--nu-d2); overflow: hidden; }
.nu-faq-q { cursor: pointer; padding: .9rem 1.1rem; font-weight: 700; list-style: none; position: relative; padding-right: 2.4rem; }
.nu-faq-q::-webkit-details-marker { display: none; }
.nu-faq-q::after { content: "+"; position: absolute; right: 1.1rem; top: 50%; transform: translateY(-50%); font-size: 1.3rem; color: var(--nu-accent); }
.nu-faq-item[open] .nu-faq-q::after { content: "–"; }
.nu-faq-a { padding: 0 1.1rem 1rem; color: var(--nu-text-soft); }
.nu-faq-a p { margin: .2rem 0; }

/* ---- blog ---------------------------------------------------------------- */
.nu-article { max-width: 74ch; }
.nu-prose { font-size: 1.02rem; }
.nu-post-meta { display: flex; flex-wrap: wrap; gap: .3rem 1rem; align-items: center; }
.nu-post-dates { font-size: .85rem; color: var(--nu-text-soft); }
.nu-post-foot { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--nu-line); font-size: .92rem; color: var(--nu-text-soft); }
.nu-postgrid { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.nu-postcard-link { display: grid; gap: .35rem; padding: 1.1rem; border-radius: var(--nu-radius); box-shadow: var(--nu-d2); text-decoration: none; color: var(--nu-text); height: 100%; }
.nu-postcard-link:hover { box-shadow: var(--nu-d1); }
.nu-postcard-date { font-size: .78rem; color: var(--nu-text-soft); }
.nu-postcard-title { font-weight: 700; font-size: 1.05rem; line-height: 1.3; }
.nu-postcard-desc { font-size: .9rem; color: var(--nu-text-soft); }
.nu-postcard-more { font-size: .85rem; color: var(--nu-accent); font-weight: 700; margin-top: auto; }

/* ---- news figure (self-hosted photo, master §4) --------------------------- */
.nu-figure { margin: 0 0 var(--nu-gap); border-radius: var(--nu-radius); box-shadow: var(--nu-d2); overflow: hidden; background: var(--nu-bg); }
.nu-figure img { display: block; width: 100%; height: auto; }
.nu-figure figcaption { padding: .55rem .9rem; font-size: .8rem; color: var(--nu-text-soft); }
.nu-figure figcaption a { color: var(--nu-text-soft); text-decoration: underline; }
.nu-newsflag { display: inline-block; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .8px; color: var(--nu-accent); background: var(--nu-bg); box-shadow: var(--nu-inset); padding: .3rem .7rem; border-radius: 999px; margin: 0 0 .6rem; }

/* ---- footer -------------------------------------------------------------- */
.nu-foot { margin-top: 2rem; background: var(--nu-bg); }
.nu-foot-in { max-width: var(--nu-maxw); margin: 0 auto; padding: 2rem clamp(1rem, 4vw, 2rem) 1rem; display: grid; gap: 1.6rem; grid-template-columns: 1.6fr 1fr 1fr; }
.nu-foot-col { display: flex; flex-direction: column; gap: .4rem; font-size: .9rem; color: var(--nu-text-soft); }
.nu-foot-col a { color: var(--nu-text-soft); text-decoration: none; }
.nu-foot-col a:hover { color: var(--nu-accent); }
.nu-foot-brand, .nu-foot-h { font-weight: 700; color: var(--nu-text); margin-bottom: .2rem; }
.nu-foot-disc { font-size: .82rem; }
.nu-foot-bar { max-width: var(--nu-maxw); margin: 0 auto; padding: 1rem clamp(1rem, 4vw, 2rem); border-top: 1px solid var(--nu-line); display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between; font-size: .82rem; color: var(--nu-text-soft); }

/* ---- responsive ---------------------------------------------------------- */
@media (max-width: 760px) {
  .nu-menu-btn { display: inline-grid; place-items: center; margin-left: auto; width: 44px; height: 44px; border: 0; background: var(--nu-bg); border-radius: 12px; box-shadow: var(--nu-d2); cursor: pointer; }
  .nu-menu-bars, .nu-menu-bars::before, .nu-menu-bars::after { content: ""; display: block; width: 20px; height: 2px; background: var(--nu-text); position: relative; }
  .nu-menu-bars::before { position: absolute; top: -6px; } .nu-menu-bars::after { position: absolute; top: 6px; }
  .nu-nav { margin-left: 0; flex-basis: 100%; flex-direction: column; align-items: stretch; gap: .25rem; max-height: 0; overflow: hidden; transition: max-height .2s ease; }
  .nu-nav.is-open { max-height: 520px; padding-top: .5rem; }
  .nu-nav a { padding: .7rem .8rem; }
  .nu-foot-in { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .nu-nav { transition: none; } }