/* =========================================================
   UPFINITY — SHARED THEME
   Design tokens, reset, header/nav, footer, buttons, utilities.
   Loaded on every page, before the page-specific stylesheet.
   ========================================================= */

:root{
  /* ---- Color: brand violet, kept from the original palette,
     extended into a small named scale ---- */
  --violet-900:#2c1c7a;
  --violet-700:#4b30bd;   /* primary — from original header/hero */
  --violet-600:#5c3ad2;
  --violet-500:#7137d4;   /* from original buttons */
  --violet-400:#9159ea;   /* from original button hover */
  --lilac-300:#c9b7f7;
  --blue-500:#5d87e1;     /* from original contact gradient */
  --teal-500:#22c6a6;     /* growth accent, refined from #30bd9b */
  --amber-500:#f2a93c;    /* small warm accent for highlights */

  --ink-900:#15131f;
  --ink-700:#312f42;
  --ink-500:#5b5972;
  --ink-300:#8f8da3;

  --surface-0:#ffffff;
  --surface-50:#faf9fd;
  --surface-100:#f1eefb;
  --surface-200:#e9e4f9;
  --border:#e6e2f5;

  --grad-brand: linear-gradient(115deg, var(--violet-700) 0%, var(--violet-500) 52%, var(--blue-500) 100%);
  --grad-brand-hover: linear-gradient(115deg, var(--violet-900) 0%, var(--violet-700) 52%, var(--violet-500) 100%);
  --grad-mesh: radial-gradient(circle at 15% 20%, rgba(93,135,225,.35), transparent 40%),
               radial-gradient(circle at 85% 15%, rgba(34,198,166,.28), transparent 38%),
               radial-gradient(circle at 50% 100%, rgba(75,48,189,.30), transparent 45%);

  /* ---- Type ---- */
  --font-display:'Poppins', 'Segoe UI', sans-serif;
  --font-body:'Inter', 'Segoe UI', sans-serif;
  --font-label:'Space Grotesk', 'Segoe UI', sans-serif;

  /* ---- Shape & shadow ---- */
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:26px;
  --radius-pill:999px;
  --shadow-sm: 0 2px 10px rgba(21,19,31,.06);
  --shadow-md: 0 12px 30px -10px rgba(43,26,120,.22);
  --shadow-lg: 0 25px 60px -18px rgba(43,26,120,.35);

  --container:1400px;
  --header-h:78px;
}

/* ---------------------------------------------------------
   Reset
   --------------------------------------------------------- */
*, *::before, *::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top: calc(var(--header-h) + 14px); }
html, body{ width:100%; overflow-x:hidden; }

body{
  margin:0;
  font-family:var(--font-body);
  background:var(--surface-50);
  color:var(--ink-700);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; }
ul{ margin:0; }
button{ font-family:inherit; }

h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--ink-900);
  line-height:1.15;
  margin:0 0 .5em;
  font-weight:600;
}

p{ margin:0 0 1em; }

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 clamp(20px, 4vw, 40px);
}

/* Eyebrow / section label — used to name what a section is about */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-label);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--violet-600);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:18px; height:2px;
  border-radius:2px;
  background:var(--grad-brand);
}
.eyebrow.on-dark{ color:#dcd3fb; }
.eyebrow.on-dark::before{ background:linear-gradient(90deg,#fff,#c9b7f7); }
.eyebrow.center{ display:inline-flex; justify-content:center; }

/* Reveal-on-scroll (progressive enhancement, no library) */
[data-reveal]{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
}
[data-reveal].in-view{ opacity:1; transform:translateY(0); }
[data-reveal="scale"]{ transform:translateY(0) scale(.94); }
[data-reveal="scale"].in-view{ transform:translateY(0) scale(1); }
@media (prefers-reduced-motion: reduce){
  [data-reveal]{ opacity:1; transform:none; transition:none; }
  html{ scroll-behavior:auto; }
}
.js-off [data-reveal]{ opacity:1; transform:none; } /* if JS never runs, content still shows */

/* ---------------------------------------------------------
   Buttons — same targets/labels everywhere, styling only
   --------------------------------------------------------- */
.btn-about{
  --btn-fg:#fff;
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 26px;
  background:var(--grad-brand);
  background-size:140% 140%;
  background-position:0% 50%;
  color:var(--btn-fg);
  font-family:var(--font-body);
  font-weight:600;
  font-size:15px;
  border-radius:var(--radius-pill);
  text-decoration:none;
  box-shadow:var(--shadow-md);
  transition:transform .25s ease, box-shadow .25s ease, background-position .5s ease;
}
.btn-about::after{
  content:"";
  width:8px; height:8px;
  border-top:2px solid currentColor;
  border-right:2px solid currentColor;
  transform:rotate(45deg) translate(-1px,1px);
  transition:transform .25s ease;
}
.btn-about:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-lg);
  background-position:100% 50%;
}
.btn-about:hover::after{ transform:rotate(45deg) translate(1px,-1px); }
.btn-about:active{ transform:translateY(-1px); }
.btn-about:focus-visible{ outline:3px solid var(--blue-500); outline-offset:3px; }

.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-pill);
  border:1.5px solid var(--border);
  color:var(--ink-700);
  font-weight:600;
  font-size:15px;
  text-decoration:none;
  background:var(--surface-0);
  transition:border-color .25s ease, transform .25s ease, color .25s ease;
}
.btn-ghost:hover{ border-color:var(--violet-500); color:var(--violet-600); transform:translateY(-2px); }

/* ---------------------------------------------------------
   Header
   --------------------------------------------------------- */
header{
  position:sticky;
  top:0;
  z-index:100;
  height:var(--header-h);
  display:flex;
  align-items:center;
  padding:0 28px;
  background:linear-gradient(115deg, var(--violet-700), var(--violet-500) 65%, var(--blue-500) 130%);
  color:#fff;
}
header .header-inner{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
header.is-scrolled{
  box-shadow:0 10px 30px -12px rgba(21,10,60,.45);
}
.brand-link{ display:inline-flex; align-items:center; }
.up-name{ width:158px; height:auto; }

nav{ display:flex; align-items:center; }
.nav-links{
  display:flex;
  align-items:center;
  gap:8px;
  list-style:none;
  padding:0;
  margin:0;
}
.nav-links a{
  display:inline-block;
  padding:9px 16px;
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:14.5px;
  border-radius:var(--radius-pill);
  opacity:.92;
  transition:background .25s ease, opacity .25s ease;
}
.nav-links a:hover{ background:rgba(255,255,255,.16); opacity:1; }
.nav-links a:focus-visible{ outline:2px solid #fff; outline-offset:2px; }

.nav-toggle{
  display:none;
  width:44px; height:44px;
  border-radius:var(--radius-sm);
  border:1px solid rgba(255,255,255,.4);
  background:rgba(255,255,255,.08);
  color:#fff;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.nav-toggle svg{ width:22px; height:22px; }
.nav-toggle .icon-close{ display:none; }
.nav-open .nav-toggle .icon-menu{ display:none; }
.nav-open .nav-toggle .icon-close{ display:block; }

@media (max-width: 860px){
  .nav-toggle{ display:inline-flex; }
  nav{
    position:fixed;
    inset:var(--header-h) 0 0 0;
    background:linear-gradient(180deg, var(--violet-700), var(--violet-900));
    transform:translateY(-14px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .28s ease, transform .28s ease, visibility .28s;
    padding-top:12px;
  }
  .nav-open nav{
    transform:translateY(0);
    opacity:1;
    visibility:visible;
    pointer-events:auto;
  }
  nav{ align-items:flex-start; overflow-y:auto; }
  .nav-links{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:14px 20px;
  }
  .nav-links a{
    padding:16px 18px;
    font-size:17px;
    border-bottom:1px solid rgba(255,255,255,.12);
    border-radius:10px;
  }
}

/* ---------------------------------------------------------
   Footer
   --------------------------------------------------------- */
footer{
  background:var(--ink-900);
  color:#cfccdd;
  padding:56px 0 22px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr 1fr;
  gap:40px;
  padding-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand .up-name{ width:150px; margin-bottom:14px; }
.footer-brand p{ color:#a9a6bc; font-size:14.5px; line-height:1.7; max-width:320px; }
.footer-col h4{
  font-family:var(--font-label);
  color:#fff;
  font-size:13px;
  letter-spacing:.08em;
  text-transform:uppercase;
  margin-bottom:16px;
}
.footer-col ul{ list-style:none; padding:0; display:flex; flex-direction:column; gap:12px; }
.footer-col a{
  color:#b9b6cc;
  text-decoration:none;
  font-size:14.5px;
  transition:color .2s ease;
}
.footer-col a:hover{ color:#fff; }
.footer-container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  padding-top:22px;
}
.copyright{ margin:0; font-size:13.5px; color:#8b8899; text-align:left; }
.footer-links{ margin:0; display:flex; gap:22px; }
.footer-links a{
  color:#cfccdd;
  text-decoration:none;
  font-size:13.5px;
  transition:color .2s ease;
}
.footer-links a:hover{ color:#fff; text-decoration:underline; text-underline-offset:4px; }

@media (max-width:860px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .footer-brand{ grid-column:1 / -1; }
}
@media (max-width:600px){
  .footer-grid{ grid-template-columns:1fr; text-align:left; }
  .footer-container{ flex-direction:column; text-align:center; }
  .copyright{ text-align:center; }
}

/* ---------------------------------------------------------
   Back-to-top
   --------------------------------------------------------- */
.to-top{
  position:fixed;
  right:22px;
  bottom:22px;
  width:48px; height:48px;
  border-radius:50%;
  border:none;
  background:var(--grad-brand);
  color:#fff;
  box-shadow:var(--shadow-lg);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  opacity:0;
  transform:translateY(10px) scale(.9);
  pointer-events:none;
  transition:opacity .25s ease, transform .25s ease;
  z-index:90;
}
.to-top.is-visible{ opacity:1; transform:translateY(0) scale(1); pointer-events:auto; }
.to-top svg{ width:20px; height:20px; }
.to-top:hover{ transform:translateY(-3px) scale(1.04); }

/* ---------------------------------------------------------
   Small shared bits
   --------------------------------------------------------- */
.dot-grid{
  background-image:radial-gradient(rgba(75,48,189,.16) 1.4px, transparent 1.4px);
  background-size:22px 22px;
}
.visually-hidden{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); white-space:nowrap; border:0; padding:0; margin:-1px;
}