/* ==========================================================================
   Oifanda — corporate site
   Implements ../../brand/BRAND-GUIDELINES.md v1.0
   Navigation pattern mirrors oifood.oifanda.com, skinned to Oifanda identity.
   Plain CSS. No build step.
   ========================================================================== */

:root{
  /* ground */
  --ink-950:#04161A; --ink-900:#082126; --ink-800:#0C2D34;
  --ink-700:#123C44; --ink-600:#1A4E58;
  /* text */
  --paper-50:#F2F7F5; --paper-300:#A8C0BD; --paper-500:#6E8A88;
  /* accent */
  --jade-300:#6BDCC6; --jade-400:#2FBFA6; --jade-600:#1B8C78;
  --jade-tint:rgba(47,191,166,.12);
  /* warm */
  --sand-200:#E8DCC8; --sand-500:#BFA681;
  /* product */
  --oifood:#EE6107;
  /* semantic */
  --bg:var(--ink-950); --surface:var(--ink-900); --surface-2:var(--ink-800);
  --text:var(--paper-50); --text-muted:var(--paper-300); --text-faint:var(--paper-500);
  --line:rgba(242,247,245,.10); --line-strong:rgba(242,247,245,.22);
  --nav-bg:rgba(4,22,26,.82);
  --accent:var(--jade-400); --accent-hi:var(--jade-300); --on-accent:#04161A;
  --grid-line:rgba(242,247,245,.028);
  --shadow-nav:0 2px 24px rgba(0,0,0,.45);
  --grain:.055;

  /* type */
  --font-display:"Fraunces",Georgia,"Times New Roman",serif;
  --font-body:"Karla",ui-sans-serif,system-ui,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;

  --t-display:clamp(2.7rem,6.6vw,6rem);
  --t-h1:clamp(2rem,4vw,3.4rem);
  --t-h2:clamp(1.4rem,2.2vw,1.95rem);
  --t-h3:1.15rem;
  --t-body:clamp(1rem,.45vw + .92rem,1.1rem);
  --t-small:.9rem;
  --t-mono:.76rem;

  --gut:clamp(1.25rem,5vw,2rem);
  --maxw:1200px;
  --measure:68ch;
  --nav-h:72px;

  --ease:cubic-bezier(.16,1,.3,1);
  --dur-micro:200ms;
  --dur-enter:800ms;
}

/* ---------- light theme ---------- */
[data-theme="light"]{
  --bg:#F4F1EA; --surface:#FFFFFF; --surface-2:#EEE9DE;
  --text:#07242A; --text-muted:#42605D; --text-faint:#7A918D;
  --line:rgba(7,36,42,.12); --line-strong:rgba(7,36,42,.26);
  --nav-bg:rgba(244,241,234,.84);
  --accent:#12806C; --accent-hi:#0C6354; --on-accent:#FFFFFF;
  --jade-400:#12806C; --jade-300:#0C6354; --jade-tint:rgba(18,128,108,.10);
  --sand-200:#8A6B3A;
  --grid-line:rgba(7,36,42,.035);
  --shadow-nav:0 2px 20px rgba(7,36,42,.10);
  --grain:.03;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,figure,dl,dd,ul,ol{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
img,svg{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  font-family:var(--font-body);
  font-size:var(--t-body);
  line-height:1.7;
  color:var(--text-muted);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  position:relative;
  padding-top:var(--nav-h);
  transition:background var(--dur-micro) var(--ease),color var(--dur-micro) var(--ease);
}

/* atmosphere: hairline grid + grain */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(to right,var(--grid-line) 1px,transparent 1px),
    linear-gradient(to bottom,var(--grid-line) 1px,transparent 1px);
  background-size:clamp(48px,7vw,104px) clamp(48px,7vw,104px);
  -webkit-mask-image:radial-gradient(ellipse 120% 80% at 50% 0%,#000 25%,transparent 78%);
  mask-image:radial-gradient(ellipse 120% 80% at 50% 0%,#000 25%,transparent 78%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:var(--grain);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}
.shell{position:relative;z-index:1}

/* ---------- typography ---------- */
.display,h1,h2,h3{
  font-family:var(--font-display);
  font-variation-settings:"SOFT" 30,"WONK" 1,"opsz" 96;
  font-weight:600;color:var(--text);line-height:1;letter-spacing:-.022em;
}
h1{font-size:var(--t-h1)}
h2{font-size:var(--t-h2)}
h3{font-size:var(--t-h3);line-height:1.25;letter-spacing:-.01em}

.mono{font-family:var(--font-mono);font-size:var(--t-mono);letter-spacing:.14em;
  text-transform:uppercase;color:var(--text-faint)}
.lead{font-size:clamp(1.06rem,.65vw + .95rem,1.28rem);line-height:1.62;
  color:var(--text-muted);max-width:60ch}
.measure{max-width:var(--measure)}
.accent{color:var(--accent)}
.warm{color:var(--sand-200)}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut)}
.section{padding-block:clamp(3.5rem,8vw,7rem);border-top:1px solid var(--line)}

.sec-head{display:flex;gap:clamp(1rem,3vw,3rem);align-items:baseline;
  margin-bottom:clamp(2rem,4vw,3.25rem);flex-wrap:wrap}
.sec-num{font-family:var(--font-mono);font-size:var(--t-mono);letter-spacing:.14em;
  color:var(--accent);padding-top:.5em;flex:0 0 auto}
.sec-title{flex:1 1 22ch;min-width:0}
.sec-note{flex:1 1 30ch;color:var(--text-faint);font-size:var(--t-small);max-width:44ch}

.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--accent);
  color:var(--on-accent);padding:.75rem 1.25rem;font-family:var(--font-mono);
  font-size:var(--t-mono);letter-spacing:.14em;text-transform:uppercase;text-decoration:none}
.skip:focus{left:0}

/* ==========================================================================
   NAVIGATION — structure mirrors oifood.oifanda.com
   ========================================================================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:var(--nav-bg);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease),background .3s var(--ease);
}
.nav.scrolled{box-shadow:var(--shadow-nav)}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:1rem var(--gut);
  display:flex;align-items:center;justify-content:space-between;gap:1.5rem;
  min-height:var(--nav-h);
}
.nav-logo{display:inline-flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--text)}
.nav-logo svg{width:28px;height:22px;color:var(--text)}
.nav-logo__word{font-family:var(--font-display);font-weight:600;font-size:1rem;
  letter-spacing:.16em;text-transform:uppercase;
  font-variation-settings:"SOFT" 30,"WONK" 0,"opsz" 20}

.nav-links{display:flex;gap:clamp(1.1rem,2vw,2rem);align-items:center}
.nav-links a{
  font-family:var(--font-mono);font-size:var(--t-mono);letter-spacing:.14em;
  text-transform:uppercase;text-decoration:none;color:var(--text-muted);
  position:relative;padding-block:.4rem;transition:color var(--dur-micro) var(--ease);
}
.nav-links a:not(.nav-cta)::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;background:var(--accent);
  transform:scaleX(0);transform-origin:right;transition:transform var(--dur-micro) var(--ease);
}
.nav-links a:not(.nav-cta):hover,.nav-links a:not(.nav-cta):focus-visible{color:var(--text)}
.nav-links a:not(.nav-cta):hover::after,.nav-links a:not(.nav-cta):focus-visible::after{
  transform:scaleX(1);transform-origin:left}

.nav-cta{
  background:var(--accent);color:var(--on-accent)!important;
  padding:.62rem 1.25rem;border-radius:2px;font-weight:500;
  transition:background var(--dur-micro) var(--ease),transform var(--dur-micro) var(--ease)!important;
}
.nav-cta:hover,.nav-cta:focus-visible{background:var(--accent-hi);transform:translateY(-1px)}

.lang-switch,.theme-switch{
  background:none;border:1px solid var(--line-strong);border-radius:2px;
  padding:.38rem .66rem;font-family:var(--font-mono);font-size:.72rem;font-weight:500;
  letter-spacing:.1em;color:var(--text-muted);
  transition:border-color var(--dur-micro) var(--ease),color var(--dur-micro) var(--ease);
}
.lang-switch:hover,.theme-switch:hover,
.lang-switch:focus-visible,.theme-switch:focus-visible{border-color:var(--accent);color:var(--accent)}
.theme-switch{padding:.4rem;line-height:0;display:inline-flex;align-items:center;justify-content:center}
.theme-switch svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}
.theme-switch .ico-sun{display:none}
[data-theme="light"] .theme-switch .ico-sun{display:block}
[data-theme="light"] .theme-switch .ico-moon{display:none}

.nav-toggle{display:none;padding:.5rem;border-radius:2px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;
  border-radius:1px;transition:transform .3s var(--ease),opacity .3s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media (max-width:920px){
  .nav-toggle{display:block}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bg);border-bottom:1px solid var(--line);
    padding:.5rem var(--gut) 1.5rem;
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    transition:max-height .35s var(--ease),opacity .25s var(--ease),visibility .25s;
  }
  .nav-links.open{max-height:80vh;opacity:1;visibility:visible;overflow:auto}
  .nav-links a{padding-block:1rem;border-bottom:1px solid var(--line);text-align:left}
  .nav-links a::after{display:none}
  .nav-cta{margin-top:1rem;text-align:center;border-bottom:0!important}
  .nav-utils{display:flex;gap:.6rem;margin-top:1.1rem}
}
.nav-utils{display:flex;align-items:center;gap:.5rem}

/* ---------- hero ---------- */
.hero{padding-block:clamp(3rem,8vw,6.5rem) clamp(3rem,7vw,6rem);position:relative}
.hero::before{content:"";position:absolute;z-index:-1;inset:0;
  background:radial-gradient(58% 90% at 15% 95%,var(--jade-tint),transparent 70%);
  pointer-events:none}
.hero__grid{display:grid;grid-template-columns:1fr;gap:clamp(2.25rem,5vw,4rem)}
@media (min-width:980px){.hero__grid{grid-template-columns:minmax(0,1.35fr) minmax(320px,.85fr);align-items:end}}
.hero__eyebrow{display:flex;align-items:center;gap:.7rem;margin-bottom:clamp(1.1rem,2.5vw,1.75rem)}
.hero__eyebrow .tick{width:26px;height:1px;background:var(--accent);flex:0 0 auto}
.hero h1{font-size:var(--t-display);line-height:.96;letter-spacing:-.033em;
  font-variation-settings:"SOFT" 30,"WONK" 1,"opsz" 144;margin-bottom:clamp(1.1rem,2.4vw,1.6rem)}
.hero h1 em{font-style:italic;color:var(--sand-200);
  font-variation-settings:"SOFT" 60,"WONK" 1,"opsz" 144}
.hero__actions{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:clamp(1.6rem,3vw,2.25rem)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--font-mono);
  font-size:var(--t-mono);letter-spacing:.14em;text-transform:uppercase;text-decoration:none;
  padding:.85rem 1.35rem;border-radius:2px;border:1px solid transparent;
  transition:background var(--dur-micro) var(--ease),color var(--dur-micro) var(--ease),
             border-color var(--dur-micro) var(--ease),transform var(--dur-micro) var(--ease)}
.btn--primary{background:var(--accent);color:var(--on-accent);font-weight:500}
.btn--primary:hover,.btn--primary:focus-visible{background:var(--accent-hi);transform:translateY(-1px)}
.btn--ghost{border-color:var(--line-strong);color:var(--text)}
.btn--ghost:hover,.btn--ghost:focus-visible{border-color:var(--accent);color:var(--accent)}
.btn .arw{transition:transform var(--dur-micro) var(--ease)}
.btn:hover .arw{transform:translateX(3px)}

/* ---------- datasheet ---------- */
.sheet{position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:4px;padding:clamp(1.4rem,3vw,2rem)}
.sheet::before,.sheet::after{content:"";position:absolute;width:11px;height:11px;
  border:1px solid var(--accent);opacity:.75}
.sheet::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.sheet::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.sheet__title{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding-bottom:.9rem;margin-bottom:1rem;border-bottom:1px solid var(--line)}
.dot{width:6px;height:6px;border-radius:999px;background:var(--accent);flex:0 0 auto;
  box-shadow:0 0 0 4px var(--jade-tint)}
.rows{display:grid}
.row{display:grid;grid-template-columns:minmax(86px,.5fr) 1fr;gap:1rem;padding-block:.6rem;
  border-bottom:1px solid var(--line);align-items:baseline}
.row:last-child{border-bottom:0}
.row dt{font-family:var(--font-mono);font-size:var(--t-mono);letter-spacing:.1em;
  text-transform:uppercase;color:var(--text-faint)}
.row dd{font-size:.94rem;color:var(--text);margin:0;word-break:break-word}
.mono-val{font-family:var(--font-mono);font-size:.84rem;letter-spacing:.02em}
.now-name{display:flex;align-items:center;gap:.55rem;color:var(--text);
  font-family:var(--font-display);font-size:1.06rem;font-weight:600;
  font-variation-settings:"SOFT" 30,"WONK" 1,"opsz" 24;letter-spacing:-.01em;margin-bottom:.22rem}
.now-desc{display:block;font-size:.87rem;color:var(--text-muted);line-height:1.5}
.dot--oifood{background:var(--oifood);box-shadow:0 0 0 4px rgba(238,97,7,.16)}

/* ---------- cards ---------- */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:4px;overflow:hidden}
.grid--3{grid-template-columns:1fr}
@media (min-width:760px){.grid--3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--surface);padding:clamp(1.4rem,2.6vw,2.1rem);
  transition:background var(--dur-micro) var(--ease)}
.card:hover{background:var(--surface-2)}
.card__num{font-family:var(--font-mono);font-size:var(--t-mono);letter-spacing:.14em;
  color:var(--accent);display:block;margin-bottom:1.4rem}
.card h3{margin-bottom:.65rem}
.card p{font-size:.95rem;color:var(--text-muted)}

/* ---------- principles ---------- */
.principles{display:grid;gap:clamp(1.6rem,3vw,2.5rem)}
@media (min-width:820px){.principles{grid-template-columns:repeat(2,1fr);column-gap:clamp(2.5rem,5vw,5rem)}}
.principle{border-top:1px solid var(--line);padding-top:1.35rem}
.principle h3{margin-bottom:.5rem}
.principle h3 span:first-child{color:var(--accent);font-family:var(--font-mono);
  font-size:var(--t-mono);letter-spacing:.14em;text-transform:uppercase;
  display:block;margin-bottom:.65rem}
.principle p{font-size:.95rem}

/* ---------- product ---------- */
.product{display:grid;gap:clamp(1.6rem,4vw,3rem);align-items:center;background:var(--surface);
  border:1px solid var(--line);border-radius:4px;padding:clamp(1.6rem,3.5vw,2.75rem);
  position:relative;overflow:hidden}
@media (min-width:860px){.product{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}
.product::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(70% 120% at 100% 0%,rgba(238,97,7,.11),transparent 62%)}
.product>*{position:relative}
.product h3{font-size:var(--t-h2);margin-bottom:.85rem}
.tag{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-mono);
  font-size:var(--t-mono);letter-spacing:.14em;text-transform:uppercase;padding:.38rem .7rem;
  border:1px solid rgba(238,97,7,.4);color:var(--oifood);border-radius:999px;margin-bottom:1.15rem}
.tag .dot{background:var(--oifood);box-shadow:0 0 0 4px rgba(238,97,7,.16)}
.chips{display:flex;flex-wrap:wrap;gap:.45rem;margin-top:1.4rem}
.chip{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  padding:.4rem .62rem;border:1px solid var(--line);border-radius:2px;color:var(--text-muted)}
.next{border:1px dashed var(--line-strong);border-radius:4px;
  padding:clamp(1.3rem,2.5vw,1.85rem);margin-top:1.25rem}
.next p{font-size:.94rem}

/* ---------- contact ---------- */
.contact{display:grid;gap:clamp(1.75rem,4vw,3.5rem)}
@media (min-width:860px){.contact{grid-template-columns:minmax(0,1fr) minmax(290px,.8fr)}}
.big-link{font-family:var(--font-display);font-size:clamp(1.4rem,3.2vw,2.4rem);
  font-variation-settings:"SOFT" 30,"WONK" 1,"opsz" 72;color:var(--text);text-decoration:none;
  line-height:1.15;letter-spacing:-.02em;display:inline-block;
  border-bottom:1px solid var(--line-strong);padding-bottom:.08em;word-break:break-word;
  transition:color var(--dur-micro) var(--ease),border-color var(--dur-micro) var(--ease)}
.big-link:hover,.big-link:focus-visible{color:var(--accent);border-color:var(--accent)}
.coord{display:flex;align-items:center;gap:.7rem;margin-top:1.4rem;color:var(--text-faint)}
.coord svg{width:16px;height:16px;color:var(--accent);flex:0 0 auto}
.coord span{font-family:var(--font-mono);font-size:.78rem;letter-spacing:.06em}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);padding-block:clamp(2.25rem,5vw,3.25rem)}
.foot__grid{display:flex;flex-wrap:wrap;gap:1.5rem 2.5rem;justify-content:space-between;align-items:flex-start}
.foot__legal{font-size:.82rem;color:var(--text-faint);max-width:52ch;line-height:1.65;margin-top:1rem}
.foot__links{display:flex;flex-wrap:wrap;gap:1.25rem}
.foot__links a{font-family:var(--font-mono);font-size:var(--t-mono);letter-spacing:.14em;
  text-transform:uppercase;text-decoration:none;color:var(--text-muted);
  transition:color var(--dur-micro) var(--ease)}
.foot__links a:hover,.foot__links a:focus-visible{color:var(--accent)}

/* ---------- document pages ---------- */
.doc{padding-block:clamp(2.25rem,6vw,4rem) clamp(3rem,7vw,5.5rem)}
.doc__head{margin-bottom:clamp(2.25rem,5vw,3.5rem);padding-bottom:clamp(1.4rem,3vw,2.25rem);
  border-bottom:1px solid var(--line)}
.doc__head h1{font-size:var(--t-h1);margin-block:.9rem .8rem}
.doc__body{max-width:74ch}
.doc__body h2{font-size:1.26rem;margin-top:2.6rem;margin-bottom:.8rem}
.doc__body h2:first-of-type{margin-top:0}
.doc__body h3{margin-top:1.7rem;margin-bottom:.45rem;color:var(--sand-200)}
.doc__body p{margin-bottom:1rem;font-size:1rem}
.doc__body ul{margin:0 0 1.2rem;padding-left:1.15rem;list-style:none}
.doc__body ul li{position:relative;margin-bottom:.5rem;font-size:1rem;padding-left:.35rem}
.doc__body ul li::before{content:"";position:absolute;left:-.95rem;top:.72em;width:5px;height:1px;
  background:var(--accent)}
.doc__body a{color:var(--accent);text-underline-offset:3px}
.doc__body strong{color:var(--text);font-weight:700}
.callout{border-left:2px solid var(--accent);background:var(--surface);padding:1.05rem 1.3rem;
  margin-block:1.4rem;border-radius:0 2px 2px 0}
.callout p{font-size:.95rem}
.callout p:last-child{margin-bottom:0}

/* ---------- focus ---------- */
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

/* ---------- reveal ---------- */
.js .reveal{opacity:0;transform:translateY(16px)}
.js .reveal.in{opacity:1;transform:none;
  transition:opacity var(--dur-enter) var(--ease),transform var(--dur-enter) var(--ease)}
.js .reveal.in[data-d="1"]{transition-delay:70ms}
.js .reveal.in[data-d="2"]{transition-delay:140ms}
.js .reveal.in[data-d="3"]{transition-delay:210ms}

@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none}
  .js .reveal.in{transition:none}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* ---------- print ---------- */
@media print{
  body{background:#fff;color:#111;padding-top:0}
  body::before,body::after,.nav,.hero::before{display:none}
  .display,h1,h2,h3{color:#000}
  a{text-decoration:underline}
}