/* ============================================================
   Bento4D Guide — "Midnight Almanac" design system
   Refined DARK editorial — ink-navy canvas, warm amber + mint
   accents, Space Grotesk display + Plus Jakarta Sans body,
   IBM Plex Mono labels. Calm & premium, NOT neon.
   Intentionally DISTINCT from good88168 (light/serif/emerald)
   and 79king (dark royal-gold). Same class contract as the
   build output; only the skin differs.
   ============================================================ */

:root{
  /* palette — midnight */
  --bg:#14162b;           /* page canvas, deep ink navy */
  --bg-2:#10122440;       /* translucent header */
  --surface:#1c1f3a;      /* cards / raised surfaces */
  --surface-2:#232749;    /* elevated / hover */
  --ink:#e8eaf6;          /* primary text, warm off-white */
  --ink-soft:#aeb4d6;     /* secondary text */
  --ink-faint:#787fa6;    /* muted / meta */
  --amber:#f2b544;        /* primary accent (warm) */
  --amber-dk:#d79a28;
  --amber-tint:#2a2440;   /* amber-wash on dark */
  --mint:#4fd1b4;         /* secondary accent / links */
  --mint-dk:#38b89b;
  --mint-tint:#17322f;    /* mint-wash on dark */
  --danger:#f2766f;       /* warnings */
  --danger-tint:#2e1d26;
  --line:#2a2e52;         /* hairline border */
  --line-2:#222645;
  --footer:#0f1124;       /* deepest panel */

  /* shape + depth */
  --radius:14px;
  --radius-sm:9px;
  --radius-pill:999px;
  --shadow:0 2px 6px rgba(0,0,0,.35), 0 16px 40px rgba(0,0,0,.4);
  --shadow-sm:0 2px 8px rgba(0,0,0,.3);
  --glow-amber:0 0 0 1px rgba(242,181,68,.25);
  --glow-mint:0 0 0 1px rgba(79,209,180,.3);

  /* scale */
  --maxw:1120px;
  --measure:720px;

  /* type */
  --font-head:'Space Grotesk', system-ui, 'Segoe UI', sans-serif;
  --font-body:'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
}

/* ---------- reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.72;
  color:var(--ink);
  background:var(--bg);
  background-image:
    radial-gradient(40% 50% at 100% 0%, rgba(242,181,68,.06) 0%, transparent 60%),
    radial-gradient(45% 55% at 0% 8%, rgba(79,209,180,.06) 0%, transparent 55%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--mint);text-decoration:none}
a:hover{color:var(--mint-dk);text-decoration:underline;text-underline-offset:2px}
strong{font-weight:600;color:#f3f5ff}
hr{border:0;border-top:1px solid var(--line);margin:2.2rem 0}

/* ---------- layout ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:20px}
.prose{max-width:var(--measure)}
main{display:block}
.section{padding-block:clamp(2.2rem,5vw,3.6rem)}

/* ---------- typography ---------- */
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:600;
  line-height:1.18;
  letter-spacing:-.015em;
  color:#f4f6ff;
  margin:0 0 .6em;
}
h1{font-size:clamp(2rem,4.6vw,2.95rem);letter-spacing:-.025em}
h2{font-size:clamp(1.45rem,3vw,1.95rem);margin-top:2.1em}
h3{font-size:clamp(1.15rem,2vw,1.38rem);margin-top:1.7em}
h4{font-size:1.06rem;margin-top:1.4em}
.prose p{margin:0 0 1.15em}
.prose > :first-child{margin-top:0}
.lead{font-size:1.16rem;color:var(--ink-soft);line-height:1.66}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(16,18,36,.78);
  backdrop-filter:saturate(1.4) blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header .bar{display:flex;align-items:center;gap:1rem;height:66px}
.brand{display:flex;align-items:baseline;gap:.42rem;font-family:var(--font-head);
  font-weight:700;font-size:1.3rem;color:#f4f6ff;letter-spacing:-.02em;white-space:nowrap}
.brand:hover{text-decoration:none;color:#f4f6ff}
.brand .dot{color:var(--amber)}
.brand .tag{font-family:var(--font-mono);font-size:.6rem;font-weight:500;letter-spacing:.16em;
  text-transform:uppercase;color:var(--amber);border:1px solid rgba(242,181,68,.5);
  border-radius:var(--radius-pill);padding:.16em .55em;transform:translateY(-2px)}
.nav{margin-left:auto;display:flex;align-items:center;gap:.3rem}
.nav a{color:var(--ink-soft);font-size:.95rem;font-weight:500;padding:.5rem .7rem;border-radius:var(--radius-sm)}
.nav a:hover{color:var(--amber);background:var(--amber-tint);text-decoration:none}
.nav .btn{margin-left:.4rem}
.nav-toggle{display:none}
.hamburger{display:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-family:var(--font-body);font-weight:600;font-size:1rem;line-height:1;
  padding:.82em 1.3em;border-radius:var(--radius-pill);
  border:1.5px solid transparent;cursor:pointer;transition:.16s ease;white-space:nowrap;
}
.btn-primary{background:var(--amber);color:#17121f;box-shadow:0 6px 18px rgba(242,181,68,.18)}
.btn-primary:hover{background:var(--amber-dk);color:#140f1a;text-decoration:none;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--mint);border-color:var(--line)}
.btn-ghost:hover{background:var(--surface);border-color:var(--mint);color:var(--mint);text-decoration:none}
.btn-sm{font-size:.9rem;padding:.6em 1em}

/* ---------- hero ---------- */
.hero{
  background:
    radial-gradient(55% 120% at 90% -20%, rgba(242,181,68,.14) 0%, transparent 55%),
    radial-gradient(60% 120% at -8% 0%, rgba(79,209,180,.12) 0%, transparent 50%);
  border-bottom:1px solid var(--line);
}
.hero .inner{padding-block:clamp(2.6rem,6vw,4.6rem);max-width:760px}
.eyebrow{display:inline-flex;align-items:center;gap:.5em;font-family:var(--font-mono);
  font-size:.72rem;font-weight:500;letter-spacing:.16em;text-transform:uppercase;
  color:var(--amber);background:var(--amber-tint);border:1px solid rgba(242,181,68,.3);
  padding:.4em .8em;border-radius:var(--radius-pill);margin-bottom:1.1rem}
.hero h1{margin-bottom:.5rem}
.hero .lead{margin:0 0 1.7rem;max-width:40em}
.hero-cta{display:flex;flex-wrap:wrap;gap:.7rem;align-items:center}
.trust-strip{display:flex;flex-wrap:wrap;gap:.4rem .5rem;margin-top:1.6rem}
.chip{display:inline-flex;align-items:center;gap:.4em;font-size:.82rem;font-weight:500;
  color:var(--ink-soft);background:var(--surface);border:1px solid var(--line);
  padding:.35em .75em;border-radius:var(--radius-pill)}
.chip .ck{color:var(--mint);font-weight:700}

/* ---------- card grid ---------- */
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.3rem 1.3rem 1.2rem;box-shadow:var(--shadow-sm);transition:.16s ease;display:block;
}
a.card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow);
  border-color:rgba(79,209,180,.5);background:var(--surface-2)}
.card .k{font-family:var(--font-mono);font-size:.72rem;color:var(--amber);letter-spacing:.1em;font-weight:500}
.card h3{font-size:1.1rem;margin:.35rem 0 .3rem;color:#f4f6ff}
.card p{margin:0;color:var(--ink-soft);font-size:.95rem;line-height:1.55}
.card .go{margin-top:.7rem;color:var(--mint);font-weight:600;font-size:.92rem}

/* section heads */
.sec-head{max-width:var(--measure)}
.sec-head .eyebrow{margin-bottom:.7rem}

/* ---------- breadcrumbs ---------- */
.crumbs{font-size:.85rem;color:var(--ink-faint);padding-top:1.4rem}
.crumbs a{color:var(--ink-soft)}
.crumbs a:hover{color:var(--amber)}
.crumbs .sep{margin:0 .45em;color:var(--line)}

/* ---------- article prose ---------- */
.prose a{text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px;
  text-decoration-color:rgba(79,209,180,.45)}
.prose a:hover{text-decoration-color:var(--mint)}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.3em}
.prose li{margin:.4em 0}
.prose li::marker{color:var(--amber)}
.prose blockquote{
  margin:1.5em 0;padding:1rem 1.2rem;background:var(--surface);
  border-left:4px solid var(--amber);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--ink);font-size:1rem;
}
.prose blockquote p{margin:.3em 0}
.prose blockquote strong{color:var(--amber)}
.prose code{font-family:var(--font-mono);font-size:.88em;background:var(--surface-2);
  border:1px solid var(--line);border-radius:5px;padding:.1em .4em;color:var(--mint)}

/* tables */
.table-wrap{overflow-x:auto;margin:1.4em 0;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);background:var(--surface)}
.prose table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:min(100%,560px)}
.prose th,.prose td{text-align:left;padding:.82rem 1rem;border-bottom:1px solid var(--line-2);vertical-align:top}
.prose thead th{background:var(--surface-2);font-family:var(--font-head);font-weight:600;
  color:#f4f6ff;border-bottom:1.5px solid var(--line);letter-spacing:-.01em}
.prose tbody tr:last-child td{border-bottom:0}
.prose tbody tr:nth-child(even) td{background:rgba(255,255,255,.02)}

/* callouts */
.callout{margin:1.5em 0;padding:1.05rem 1.2rem;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--surface);display:flex;gap:.8rem}
.callout .ico{flex:none;font-size:1.1rem;line-height:1.5}
.callout.warn{background:var(--danger-tint);border-color:#4a2c33}
.callout.warn strong{color:var(--danger)}
.callout.tip{background:var(--mint-tint);border-color:#245049}

/* verified chip */
.verified{display:inline-flex;align-items:center;gap:.45em;font-family:var(--font-mono);
  font-size:.74rem;font-weight:500;color:var(--mint);background:var(--mint-tint);
  border:1px solid #245049;border-radius:var(--radius-pill);padding:.28em .7em}

/* RG ribbon */
.rg-ribbon{background:linear-gradient(90deg,rgba(242,181,68,.1),rgba(79,209,180,.08));
  border-bottom:1px solid var(--line);color:var(--ink-soft);font-size:.86rem}
.rg-ribbon .inner{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;padding-block:.7rem}
.rg-ribbon .pill18{font-family:var(--font-mono);font-weight:600;color:#17121f;background:var(--amber);
  border-radius:var(--radius-pill);padding:.1em .6em;font-size:.8rem}
.rg-ribbon a{color:var(--amber);text-decoration:underline}

/* ---------- footer ---------- */
.site-footer{background:var(--footer);color:var(--ink-soft);margin-top:3rem;border-top:1px solid var(--line)}
.site-footer a{color:var(--ink-soft)}
.site-footer a:hover{color:var(--amber)}
.footer-top{display:grid;gap:2rem;grid-template-columns:1.4fr 1fr 1fr 1fr;padding-block:2.8rem 2rem}
.footer-brand .brand{color:#f4f6ff}
.footer-brand .brand .dot{color:var(--amber)}
.footer-brand p{color:var(--ink-faint);font-size:.9rem;max-width:30ch;margin:.9rem 0 0}
.fcol h4{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--amber);font-weight:500;margin:0 0 .9rem}
.fcol ul{list-style:none;margin:0;padding:0}
.fcol li{margin:.5rem 0}
.fcol a{font-size:.94rem}
.footer-legal{border-top:1px solid var(--line);padding-block:1.5rem;font-size:.84rem;color:var(--ink-faint)}
.footer-legal .disc{margin:0 0 .7rem;line-height:1.6}
.footer-legal .meta{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;align-items:center}
.footer-legal .pill18{font-family:var(--font-mono);font-weight:600;color:#17121f;background:var(--amber);
  border-radius:var(--radius-pill);padding:.1em .6em;font-size:.78rem}

/* skip link */
.skip{position:absolute;left:-999px;top:0;background:var(--amber);color:#17121f;padding:.6em 1em;border-radius:0 0 var(--radius-sm) 0;z-index:100}
.skip:focus{left:0}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:720px){
  body{font-size:16px}
  .nav{position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg);border-bottom:1px solid var(--line);padding:.5rem 20px 1rem;
    transform:translateY(-130%);transition:transform .22s ease;box-shadow:var(--shadow)}
  .nav a{padding:.8rem .4rem;border-radius:0;border-bottom:1px solid var(--line-2)}
  .nav .btn{margin:.7rem 0 0}
  .nav-toggle:checked ~ .nav{transform:translateY(0)}
  .hamburger{display:inline-flex;margin-left:auto;flex-direction:column;gap:4px;
    width:42px;height:38px;align-items:center;justify-content:center;cursor:pointer;
    border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface)}
  .hamburger span{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:460px){
  .footer-top{grid-template-columns:1fr}
  .brand .tag{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}