/* ============================================================
   TDD Innovative Solutions LLC — stylesheet
   ============================================================ */

:root{
  --navy-900:#081120;
  --navy-800:#0b1524;
  --navy-700:#12203a;
  --ink:#0f1b2d;
  --body:#4a5a70;
  --muted:#71809a;
  --line:#e3e8f0;
  --bg:#ffffff;
  --bg-soft:#f6f9fc;
  --teal:#0fb5a4;
  --teal-dark:#0a8f83;
  --blue:#2f7ff0;
  --grad:linear-gradient(120deg,#0fb5a4 0%,#2f7ff0 100%);
  --shadow-sm:0 1px 2px rgba(15,27,45,.06),0 4px 12px rgba(15,27,45,.05);
  --shadow-md:0 4px 10px rgba(15,27,45,.06),0 18px 40px rgba(15,27,45,.09);
  --shadow-lg:0 30px 70px rgba(8,17,32,.16);
  --r-sm:10px; --r-md:16px; --r-lg:22px;
  --header-h:76px;
  --wrap:1180px;
  --font-display:"Sora",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 12px);-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:var(--font-body);font-size:17px;line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;
}
img,svg{max-width:100%}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);line-height:1.18;margin:0 0 .6em;letter-spacing:-.02em;font-weight:600}
h1{font-size:clamp(2.15rem,5.6vw,3.85rem);font-weight:700;letter-spacing:-.035em}
h2{font-size:clamp(1.85rem,3.5vw,2.7rem);font-weight:700;letter-spacing:-.03em}
h3{font-size:1.22rem}
h4{font-size:1.02rem}
p{margin:0 0 1rem}
a{color:var(--teal-dark);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--teal)}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}

.wrap{width:min(100% - 2.6rem,var(--wrap));margin-inline:auto}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--navy-800);color:#fff;padding:.8rem 1.2rem;border-radius:0 0 10px 0}
.skip-link:focus{left:0;color:#fff}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-family:var(--font-display);font-weight:600;font-size:.98rem;
  padding:.95rem 1.7rem;border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(15,124,178,.28)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 14px 32px rgba(15,124,178,.36)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{color:var(--ink);border-color:var(--teal);background:rgba(15,181,164,.07);transform:translateY(-2px)}
.btn-sm{padding:.62rem 1.15rem;font-size:.9rem}
.btn-block{width:100%;padding:1.05rem 1.7rem;position:relative}
.btn[disabled]{opacity:.72;cursor:not-allowed;transform:none}

/* ---------- Header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;height:var(--header-h);
  display:flex;align-items:center;
  background:rgba(255,255,255,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s ease,box-shadow .3s ease,background .3s ease;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 2px 20px rgba(15,27,45,.05)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1.5rem}
.brand{display:flex;align-items:center;gap:.7rem;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand-mark{width:38px;height:38px;flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-family:var(--font-display);font-weight:700;font-size:1.02rem;letter-spacing:-.02em;color:var(--ink)}
.brand-sub{font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);font-weight:500}

.nav{display:flex;align-items:center;gap:.35rem}
.nav a{
  font-family:var(--font-display);font-weight:500;font-size:.95rem;color:var(--ink);
  padding:.55rem .9rem;border-radius:999px;position:relative;transition:color .2s ease,background .2s ease;
}
.nav a:not(.btn):hover{background:rgba(15,181,164,.09);color:var(--teal-dark)}
.nav a:not(.btn).active{color:var(--teal-dark)}
.nav a:not(.btn).active::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:.18rem;
  width:16px;height:2px;border-radius:2px;background:var(--grad);
}
.nav-cta{color:#fff!important;margin-left:.5rem}
.nav-cta:hover{background:var(--grad)!important}

.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:0 10px;background:none;border:1px solid var(--line);border-radius:12px;cursor:pointer}
.nav-toggle span{display:block;height:2px;width:100%;background:var(--ink);border-radius:2px;transition:transform .3s ease,opacity .2s 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)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:calc(var(--header-h) + 5.5rem) 0 5.5rem;overflow:hidden;background:var(--bg-soft)}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(15,27,45,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(15,27,45,.045) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 75% 62% at 60% 32%,#000 15%,transparent 78%);
  mask-image:radial-gradient(ellipse 75% 62% at 60% 32%,#000 15%,transparent 78%);
}
.orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.4}
.orb-a{width:520px;height:520px;background:radial-gradient(circle,#0fb5a4,transparent 68%);top:-190px;right:-120px}
.orb-b{width:460px;height:460px;background:radial-gradient(circle,#2f7ff0,transparent 68%);bottom:-220px;left:-160px;opacity:.28}

.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:3.5rem;align-items:center}
.eyebrow{
  font-family:var(--font-display);font-size:.78rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--teal-dark);margin-bottom:1.1rem;
}
.lede{font-size:1.13rem;max-width:37em;color:var(--body)}
.hero-actions{display:flex;flex-wrap:wrap;gap:.85rem;margin:2rem 0 2.6rem}

.stats{display:flex;flex-wrap:wrap;gap:2.6rem;margin:0;padding-top:1.8rem;border-top:1px solid var(--line)}
.stat dt{font-size:.82rem;color:var(--muted);letter-spacing:.04em;margin-bottom:.15rem}
.stat dd{margin:0;font-family:var(--font-display);font-weight:700;font-size:1.85rem;color:var(--ink);letter-spacing:-.02em}
.stat-unit{font-size:1.05rem;font-weight:600;color:var(--body)}

/* Hero visual */
.hero-visual{position:relative;min-height:400px;display:flex;align-items:center;justify-content:center}
.hero-ring{
  width:290px;height:290px;border-radius:50%;
  border:1.5px dashed rgba(15,181,164,.45);
  box-shadow:inset 0 0 60px rgba(47,127,240,.10);
  animation:spin 34s linear infinite;
}
.hero-ring::after{
  content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:180px;height:180px;border-radius:50%;background:var(--grad);opacity:.10;filter:blur(6px);
}
@keyframes spin{to{transform:rotate(360deg)}}
.card-float{
  position:absolute;display:flex;align-items:center;gap:.7rem;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:.8rem 1.05rem;box-shadow:var(--shadow-md);animation:float 6s ease-in-out infinite;
}
.card-float strong{display:block;font-family:var(--font-display);font-size:.92rem;color:var(--ink);line-height:1.3}
.card-float small{display:block;font-size:.78rem;color:var(--muted)}
.card-float .dot{width:9px;height:9px;border-radius:50%;background:var(--teal);flex:none;box-shadow:0 0 0 4px rgba(15,181,164,.16)}
.dot-b{background:var(--blue)!important;box-shadow:0 0 0 4px rgba(47,127,240,.16)!important}
.dot-c{background:#f0a92f!important;box-shadow:0 0 0 4px rgba(240,169,47,.18)!important}
.card-1{top:6%;left:-2%;animation-delay:0s}
.card-2{top:44%;right:-6%;animation-delay:1.2s}
.card-3{bottom:6%;left:8%;animation-delay:2.4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* ---------- Sections ---------- */
.section{padding:6.5rem 0}
.section-alt{background:var(--bg-soft);border-block:1px solid var(--line)}
.section-head{max-width:44rem;margin-bottom:3.4rem}
.kicker{
  font-family:var(--font-display);font-size:.78rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--teal-dark);margin-bottom:.9rem;display:flex;align-items:center;gap:.6rem;
}
.kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:var(--grad)}
.kicker-light{color:#5fe0d0}
.section-lede{font-size:1.08rem}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.feature{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:2rem 1.9rem;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,181,164,.35)}
.feature-icon{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;margin-bottom:1.2rem;
  background:linear-gradient(135deg,rgba(15,181,164,.14),rgba(47,127,240,.14));color:var(--teal-dark);
}
.feature-icon svg{width:24px;height:24px}
.feature p{margin:0;font-size:.99rem}

.approach{margin-top:4.5rem;padding-top:3.4rem;border-top:1px solid var(--line)}
.approach-title{font-size:1.4rem;margin-bottom:2rem}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:1.6rem;counter-reset:s}
.step{position:relative;padding-top:1.4rem;border-top:2px solid var(--line);transition:border-color .3s ease}
.step:hover{border-top-color:var(--teal)}
.step-num{font-family:var(--font-display);font-weight:700;font-size:.82rem;letter-spacing:.1em;color:var(--teal-dark);display:block;margin-bottom:.5rem}
.step h4{margin-bottom:.4rem}
.step p{font-size:.94rem;margin:0;color:var(--muted)}

/* ---------- Services ---------- */
.services-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.service-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:2.2rem 2rem;
  position:relative;overflow:hidden;transition:transform .25s ease,box-shadow .25s ease;
}
.service-card::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:var(--grad);opacity:0;transition:opacity .25s ease}
.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.service-card:hover::before{opacity:1}
.service-tag{
  display:inline-block;font-family:var(--font-display);font-size:.72rem;font-weight:600;letter-spacing:.11em;text-transform:uppercase;
  color:var(--teal-dark);background:rgba(15,181,164,.11);padding:.32rem .72rem;border-radius:999px;margin-bottom:.9rem;
}
.tag-b{color:#2166cf;background:rgba(47,127,240,.11)}
.tag-c{color:#b07610;background:rgba(240,169,47,.14)}
.tag-d{color:#7a4fd0;background:rgba(122,79,208,.11)}
.service-card>p{font-size:.99rem}
.ticks{list-style:none;margin:1.4rem 0 0;padding:1.4rem 0 0;border-top:1px dashed var(--line);display:grid;gap:.62rem}
.ticks li{position:relative;padding-left:1.75rem;font-size:.94rem;color:var(--body)}
.ticks li::before{
  content:"";position:absolute;left:0;top:.52em;width:1.05rem;height:.55rem;
  border-left:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:rotate(-45deg);border-radius:1px;
}

/* ---------- Platforms ---------- */
.platforms-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.platform{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:1.9rem 1.75rem;color:inherit;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.platform:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(47,127,240,.32);color:inherit}
.platform h3{font-size:1.14rem;margin-bottom:.5rem}
.platform p{font-size:.94rem;color:var(--muted);flex:1;margin-bottom:1.2rem}
.platform-icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:1.1rem;
  background:linear-gradient(135deg,rgba(47,127,240,.13),rgba(15,181,164,.13));color:var(--blue);
}
.platform-icon svg{width:23px;height:23px}
.platform-link{
  font-family:var(--font-display);font-weight:600;font-size:.9rem;color:var(--teal-dark);
  display:inline-flex;align-items:center;gap:.4rem;
}
.platform:hover .platform-link span{transform:translateX(4px)}
.platform-link span{transition:transform .2s ease;display:inline-block}
.platform-more{background:linear-gradient(160deg,#f3f8fd,#eef6f5);border-style:dashed}

/* ---------- Contact ---------- */
.section-dark{background:var(--navy-800);color:#b6c4d8;position:relative;overflow:hidden}
.section-dark::before{
  content:"";position:absolute;width:640px;height:640px;border-radius:50%;
  background:radial-gradient(circle,rgba(15,181,164,.20),transparent 66%);top:-280px;left:-180px;filter:blur(46px);
}
.section-dark::after{
  content:"";position:absolute;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,127,240,.18),transparent 66%);bottom:-300px;right:-160px;filter:blur(46px);
}
.section-dark h2,.section-dark h3,.section-dark strong{color:#fff}
.section-dark .section-lede{color:#a9b8cd}
.contact-wrap{position:relative;display:grid;grid-template-columns:1fr 1.05fr;gap:4rem;align-items:start}
.contact-points{list-style:none;margin:2.4rem 0 0;padding:0;display:grid;gap:1.35rem}
.contact-points li{display:flex;gap:1rem;align-items:flex-start}
.cp-icon{
  width:42px;height:42px;flex:none;border-radius:12px;display:grid;place-items:center;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);color:#5fe0d0;
}
.cp-icon svg{width:20px;height:20px}
.contact-points strong{display:block;font-family:var(--font-display);font-size:.95rem;margin-bottom:.1rem}
.contact-points span,.contact-points a{font-size:.95rem;color:#a9b8cd}

/* Form */
.form-card{
  background:#fff;border-radius:var(--r-lg);padding:2.4rem;box-shadow:var(--shadow-lg);position:relative;
}
.field{margin-bottom:1.15rem}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
label{display:block;font-family:var(--font-display);font-size:.88rem;font-weight:600;color:var(--ink);margin-bottom:.45rem}
.req{color:var(--teal-dark)}
.opt{font-weight:400;color:var(--muted);font-size:.82rem}
input,select,textarea{
  width:100%;font-family:var(--font-body);font-size:.97rem;color:var(--ink);
  padding:.82rem .95rem;border:1px solid var(--line);border-radius:var(--r-sm);background:#fdfefe;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
textarea{resize:vertical;min-height:120px}
select{
  appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2371809a' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='m5 9 7 7 7-7'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 1rem center;padding-right:2.6rem;
}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--teal);background:#fff;box-shadow:0 0 0 4px rgba(15,181,164,.14);
}
input.invalid,select.invalid,textarea.invalid{border-color:#e0576b;box-shadow:0 0 0 4px rgba(224,87,107,.11)}
.error{font-size:.83rem;color:#d0364c;margin:.4rem 0 0;min-height:0;display:none}
.error.show{display:block}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-note{font-size:.83rem;color:var(--muted);text-align:center;margin:.9rem 0 0}
.form-status{margin:1rem 0 0;padding:.9rem 1rem;border-radius:var(--r-sm);font-size:.92rem;display:none}
.form-status.show{display:block}
.form-status.ok{background:rgba(15,181,164,.1);color:#0a7a70;border:1px solid rgba(15,181,164,.3)}
.form-status.err{background:rgba(224,87,107,.09);color:#c3253c;border:1px solid rgba(224,87,107,.28)}
.spinner{
  width:17px;height:17px;border-radius:50%;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;
  display:none;animation:spin .7s linear infinite;
}
.btn.loading .btn-label{opacity:.75}
.btn.loading .spinner{display:inline-block}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-900);color:#8b9bb4;padding:4rem 0 1.8rem;font-size:.94rem}
.footer-inner{display:grid;grid-template-columns:1.2fr 1fr;gap:3rem;padding-bottom:2.6rem;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand .brand-name{color:#fff;font-size:1.08rem;display:block;margin-bottom:.7rem}
.footer-brand p{max-width:34em;margin:0;color:#8b9bb4}
.footer-nav{display:grid;grid-template-columns:repeat(2,1fr);gap:2rem}
.footer-nav h4{color:#fff;font-size:.8rem;letter-spacing:.13em;text-transform:uppercase;margin-bottom:.9rem}
.footer-nav a{display:block;color:#8b9bb4;padding:.24rem 0;font-size:.93rem}
.footer-nav a:hover{color:#5fe0d0}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;padding-top:1.6rem}
.footer-bottom p{margin:0;font-size:.87rem;color:#6d7d95}
.to-top{color:#8b9bb4;font-size:.87rem}
.to-top:hover{color:#5fe0d0}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .65s cubic-bezier(.22,.8,.3,1),transform .65s cubic-bezier(.22,.8,.3,1)}
.reveal.visible{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .hero-inner{grid-template-columns:1fr;gap:2.5rem}
  .hero-visual{min-height:320px}
  .contact-wrap{grid-template-columns:1fr;gap:2.6rem}
  .steps{grid-template-columns:repeat(2,1fr);gap:1.8rem}
  .platforms-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  body{font-size:16px}
  .nav-toggle{display:flex}
  .nav{
    position:fixed;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);padding:.7rem 1.3rem 1.3rem;
    box-shadow:0 20px 40px rgba(15,27,45,.12);
    transform:translateY(-14px);opacity:0;visibility:hidden;transition:opacity .25s ease,transform .25s ease,visibility .25s;
  }
  .nav.open{transform:none;opacity:1;visibility:visible}
  .nav a{padding:.9rem .6rem;border-radius:10px;font-size:1rem;border-bottom:1px solid var(--line)}
  .nav a:last-child{border-bottom:none}
  .nav a:not(.btn).active::after{display:none}
  .nav-cta{margin:.8rem 0 0;justify-content:center}
  .section{padding:4.5rem 0}
  .hero{padding:calc(var(--header-h) + 3rem) 0 4rem}
  .hero-visual{display:none}
  .about-grid,.services-grid,.platforms-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:2.2rem}
  .form-card{padding:1.7rem 1.4rem}
  .stats{gap:1.8rem}
}
@media (max-width:560px){
  .wrap{width:min(100% - 2rem,var(--wrap))}
  .steps{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr;gap:0}
  .hero-actions .btn{width:100%}
  .brand-name{font-size:.94rem}
  .card-float{padding:.65rem .85rem}
  .card-2{right:-2%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

@media print{
  .site-header,.nav-toggle,.hero-visual,.form-card,.to-top{display:none}
  body{color:#000}
  .section{padding:1.2rem 0}
}