/* =========================================================
   Interface Tax/Management Systems, Inc.
   Monochrome (black & white) design system
   ========================================================= */

:root{
  --black:#0e0e0e;
  --ink:#161616;
  --white:#ffffff;
  --paper:#f7f7f5;
  --line:#e3e3e0;
  --muted:#6c6c6c;
  --muted-2:#9a9a9a;
  --max:1180px;
  --pad:clamp(1.25rem,5vw,4rem);
  --ease:cubic-bezier(.22,1,.36,1);
  --shadow:0 18px 50px -24px rgba(0,0,0,.35);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

h1,h2,h3,h4{
  font-family:"Space Grotesk","Inter",sans-serif;
  line-height:1.08;
  font-weight:600;
  letter-spacing:-.02em;
  color:var(--black);
}
h1{font-size:clamp(2.4rem,6vw,4.4rem)}
h2{font-size:clamp(1.9rem,4vw,3rem)}
h3{font-size:clamp(1.2rem,2.2vw,1.5rem)}
p{color:#2c2c2c}

.wrap{max-width:var(--max);margin:0 auto;padding-inline:var(--pad)}
.eyebrow{
  font-family:"Space Grotesk",sans-serif;
  text-transform:uppercase;
  letter-spacing:.28em;
  font-size:.72rem;
  font-weight:600;
  color:var(--muted);
  display:inline-flex;align-items:center;gap:.7rem;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--black)}
.center{text-align:center}
.center .eyebrow::before{display:none}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:"Space Grotesk",sans-serif;font-weight:600;
  font-size:.95rem;letter-spacing:.01em;
  padding:.95rem 1.7rem;border:1.5px solid var(--black);
  background:var(--black);color:var(--white);
  border-radius:2px;cursor:pointer;
  transition:transform .35s var(--ease),background .35s var(--ease),color .35s var(--ease);
}
.btn:hover{background:var(--white);color:var(--black);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--black)}
.btn--ghost:hover{background:var(--black);color:var(--white)}
.btn .arr{transition:transform .35s var(--ease)}
.btn:hover .arr{transform:translateX(4px)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;
  height:74px;max-width:var(--max);margin:0 auto;padding-inline:var(--pad)}
.brand img{height:30px;width:auto}
.brand{display:flex;align-items:center;gap:.8rem}
.nav-links{display:flex;align-items:center;gap:2.2rem;list-style:none}
.nav-links a{
  font-family:"Space Grotesk",sans-serif;font-weight:500;
  font-size:.95rem;color:var(--ink);position:relative;padding:.3rem 0;
}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;height:1.5px;width:0;
  background:var(--black);transition:width .35s var(--ease)}
.nav-links a:hover::after,.nav-links a[aria-current="page"]::after{width:100%}
.nav-links a[aria-current="page"]{color:var(--black);font-weight:600}
.nav-cta{margin-left:.4rem}
.nav-cta .btn{padding:.6rem 1.2rem}
/* Keep CTA button text white over its black fill (overrides .nav-links a color) */
.nav-links .nav-cta .btn{color:var(--white)}
.nav-links .nav-cta .btn:hover{color:var(--black)}
.menu-toggle{display:none;background:none;border:0;cursor:pointer;width:30px;height:24px;position:relative}
.menu-toggle span{position:absolute;left:0;height:2px;width:100%;background:var(--black);transition:.3s var(--ease)}
.menu-toggle span:nth-child(1){top:2px}
.menu-toggle span:nth-child(2){top:11px}
.menu-toggle span:nth-child(3){top:20px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:clamp(4rem,10vw,8rem) 0 clamp(3.5rem,7vw,6rem);overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    linear-gradient(90deg,rgba(0,0,0,.05) 1px,transparent 1px) 0 0/64px 64px,
    linear-gradient(rgba(0,0,0,.05) 1px,transparent 1px) 0 0/64px 64px;
  -webkit-mask-image:radial-gradient(120% 80% at 80% 0,#000,transparent 70%);
          mask-image:radial-gradient(120% 80% at 80% 0,#000,transparent 70%);
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(2rem,5vw,4.5rem);align-items:center}
.hero h1{margin:1.4rem 0 1.3rem}
.hero h1 em{font-style:normal;position:relative;white-space:nowrap}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:.08em;height:.16em;background:var(--black);opacity:.12}
.hero p.lead{font-size:1.15rem;color:#3a3a3a;max-width:46ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:1rem;margin-top:2rem}
.hero-meta{margin-top:2.6rem;display:flex;gap:2.2rem;flex-wrap:wrap}
.hero-meta div{border-left:2px solid var(--black);padding-left:1rem}
.hero-meta strong{font-family:"Space Grotesk",sans-serif;font-size:1.6rem;display:block;color:var(--black);letter-spacing:-.02em}
.hero-meta span{font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.12em}

.hero-card{
  background:var(--black);color:var(--white);border-radius:4px;padding:clamp(1.8rem,3vw,2.6rem);
  box-shadow:var(--shadow);position:relative;overflow:hidden;
}
.hero-card::after{content:"";position:absolute;right:-40px;bottom:-40px;width:180px;height:180px;
  border:1px solid rgba(255,255,255,.14);border-radius:50%}
.hero-card .logo-mark{height:34px;margin-bottom:1.6rem;filter:invert(1)}
.hero-card h3{color:var(--white);font-size:1.25rem;margin-bottom:.4rem}
.hero-card p{color:rgba(255,255,255,.7);font-size:.95rem}
.hero-card ul{list-style:none;margin-top:1.4rem;display:grid;gap:.75rem}
.hero-card li{display:flex;gap:.7rem;font-size:.95rem;color:rgba(255,255,255,.9);align-items:flex-start}
.hero-card li::before{content:"";flex:0 0 7px;height:7px;margin-top:.55em;background:var(--white);transform:rotate(45deg)}

/* ---------- Section base ---------- */
section{padding:clamp(3.5rem,8vw,6.5rem) 0}
.section-head{max-width:62ch;margin-bottom:3rem}
.section-head.center{margin-inline:auto}
.section-head h2{margin-top:1rem}
.section-head p{margin-top:1rem;color:var(--muted);font-size:1.08rem}

.alt{background:var(--paper);border-block:1px solid var(--line)}

/* ---------- Service cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.card{
  border:1px solid var(--line);background:var(--white);border-radius:4px;
  padding:2rem 1.8rem;transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s var(--ease);
  position:relative;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--black)}
.card .num{font-family:"Space Grotesk",sans-serif;font-size:.8rem;letter-spacing:.2em;color:var(--muted-2)}
.card h3{margin:.7rem 0 .6rem}
.card p{font-size:.97rem;color:#444}
.card .more{display:inline-flex;align-items:center;gap:.4rem;margin-top:1.2rem;
  font-family:"Space Grotesk",sans-serif;font-weight:600;font-size:.85rem;color:var(--black)}
.card .more .arr{transition:transform .35s var(--ease)}
.card:hover .more .arr{transform:translateX(4px)}

/* ---------- Detailed service list ---------- */
.svc-block{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(1.5rem,4vw,3.5rem);
  padding:clamp(2rem,4vw,3rem) 0;border-top:1px solid var(--line)}
.svc-block:first-of-type{border-top:0}
.svc-block .label{font-family:"Space Grotesk",sans-serif}
.svc-block .label .tag{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.svc-block .label h3{font-size:clamp(1.5rem,3vw,2rem);margin-top:.6rem}
.svc-list{list-style:none;display:grid;gap:.9rem}
.svc-list li{display:flex;gap:.9rem;align-items:flex-start;font-size:1rem;color:#2c2c2c}
.svc-list li::before{content:"";flex:0 0 18px;height:18px;margin-top:.2em;
  background:var(--black);-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round' d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%23000' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round' d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/contain no-repeat}
.svc-list li b{font-weight:600;color:var(--black)}

/* ---------- Notice / callout ---------- */
.notice{border:1.5px solid var(--black);border-radius:4px;padding:1.5rem 1.7rem;background:var(--white);
  display:flex;gap:1rem;align-items:flex-start;margin-top:1.6rem}
.notice .mark{flex:0 0 30px;height:30px;border:2px solid var(--black);border-radius:50%;
  display:grid;place-items:center;font-family:"Space Grotesk",sans-serif;font-weight:700}
.notice p{font-size:.95rem;color:#333}

/* ---------- Steps / process ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;counter-reset:step}
.step{padding:1.8rem 1.4rem;border-top:2px solid var(--black);position:relative}
.step::before{counter-increment:step;content:"0" counter(step);
  font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:1.6rem;color:var(--black)}
.step h3{font-size:1.1rem;margin:.6rem 0 .4rem}
.step p{font-size:.92rem;color:#555}

/* ---------- Stat band ---------- */
.band{background:var(--black);color:var(--white)}
.band .wrap{display:grid;grid-template-columns:1.3fr 1fr;gap:3rem;align-items:center}
.band h2{color:var(--white)}
.band p{color:rgba(255,255,255,.72)}
.band .btn{border-color:var(--white);background:var(--white);color:var(--black)}
.band .btn:hover{background:transparent;color:var(--white)}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4rem);align-items:center}
.values{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem;margin-top:1rem}
.value{border:1px solid var(--line);padding:1.6rem;border-radius:4px}
.value h3{font-size:1.1rem;margin-bottom:.4rem;display:flex;align-items:center;gap:.6rem}
.value h3 .dot{width:9px;height:9px;background:var(--black);transform:rotate(45deg)}
.value p{font-size:.93rem;color:#555}
.portrait{background:var(--black);border-radius:4px;aspect-ratio:4/5;display:grid;place-items:center;overflow:hidden;position:relative}
.portrait img{height:55%;filter:invert(1);opacity:.92}
.portrait::after{content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(255,255,255,.06),transparent 60%)}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(2rem,5vw,4rem)}
.info-list{list-style:none;display:grid;gap:1.6rem;margin-top:2rem}
.info-list li{display:flex;gap:1rem;align-items:flex-start}
.info-list .ic{flex:0 0 44px;height:44px;border:1.5px solid var(--black);border-radius:4px;display:grid;place-items:center}
.info-list .ic svg{width:20px;height:20px}
.info-list .t{font-family:"Space Grotesk",sans-serif;font-size:.74rem;text-transform:uppercase;letter-spacing:.18em;color:var(--muted)}
.info-list .v{font-size:1.05rem;color:var(--black);font-weight:500}
.info-list a.v:hover{text-decoration:underline}

form{display:grid;gap:1.1rem;background:var(--paper);border:1px solid var(--line);padding:clamp(1.6rem,3vw,2.4rem);border-radius:4px}
.field{display:grid;gap:.4rem}
.field label{font-family:"Space Grotesk",sans-serif;font-size:.82rem;font-weight:600;letter-spacing:.02em}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:1rem;padding:.85rem 1rem;border:1.5px solid var(--line);
  border-radius:3px;background:var(--white);color:var(--ink);transition:border-color .25s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--black)}
.field textarea{resize:vertical;min-height:130px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
form .btn{justify-content:center;margin-top:.4rem}
.form-note{font-size:.82rem;color:var(--muted)}
.map-embed{margin-top:2rem;border:1px solid var(--line);border-radius:4px;overflow:hidden;filter:grayscale(1) contrast(1.05)}
.map-embed iframe{width:100%;height:300px;border:0;display:block}

/* ---------- Footer ---------- */
.site-footer{background:var(--black);color:var(--white);padding:clamp(3rem,6vw,4.5rem) 0 2rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2.5rem}
.site-footer .logo-mark{height:30px;filter:invert(1);margin-bottom:1.2rem}
.site-footer p{color:rgba(255,255,255,.62);font-size:.95rem;max-width:34ch}
.foot-col h4{color:#fff;font-size:.8rem;text-transform:uppercase;letter-spacing:.18em;margin-bottom:1.1rem;font-family:"Space Grotesk",sans-serif}
.foot-col ul{list-style:none;display:grid;gap:.7rem}
.foot-col a,.foot-col li{color:rgba(255,255,255,.7);font-size:.95rem}
.foot-col a:hover{color:#fff}
.foot-bottom{margin-top:3rem;padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;
  color:rgba(255,255,255,.5);font-size:.82rem}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr}
  .hero-card{margin-top:.5rem}
  .cards{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .band .wrap,.about-grid,.contact-grid{grid-template-columns:1fr}
  .svc-block{grid-template-columns:1fr;gap:1.2rem}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .menu-toggle{display:block}
  .nav-links{
    position:fixed;inset:74px 0 auto 0;flex-direction:column;align-items:flex-start;
    gap:0;background:var(--white);border-bottom:1px solid var(--line);
    padding:1rem var(--pad) 1.5rem;transform:translateY(-120%);transition:transform .4s var(--ease);
    box-shadow:var(--shadow)}
  .nav-links.open{transform:none}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:.9rem 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-links .nav-cta{margin:1rem 0 0}
  .nav-links .nav-cta .btn{width:100%;justify-content:center}
  .cards{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .values{grid-template-columns:1fr}
  .row2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-meta{gap:1.4rem}
}