/* =========================================================
   SUMMITREE GROUP — Design Tokens
========================================================= */
:root{
  --black: #000000;
  --bg-0: #000000;
  --bg-1: #060606;
  --bg-2: #0d0d0d;
  --white: #ffffff;
  --gray: #8A8A8A;
  --gray-soft: #D1D5DB;
  --gray-dim: #555555;
  --border: rgba(255,255,255,0.09);
  --border-strong: rgba(255,255,255,0.18);

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;

  --gradient-highlight: linear-gradient(120deg, #FFFFFF 0%, #D1D5DB 50%, #8A8A8A 100%);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --container: 1180px;
}

*{ margin:0; padding:0; box-sizing:border-box; }

html{ scroll-behavior:smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; }
}

body{
  background:var(--black);
  color:var(--white);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
button{ font-family:inherit; cursor:pointer; border:none; background:none; color:inherit; }

.nav-backdrop{\n  display:none;\n  position:fixed;\n  inset:0;\n  z-index:104;\n  opacity:0;\n  transition:opacity 0.4s var(--ease);\n}
.nav-backdrop.active{
  opacity:1;
}

body.menu-open > *:not(#nav):not(.nav-backdrop){
  filter:blur(5px);
  transition:filter 0.4s var(--ease);
}
body:not(.menu-open) > *:not(#nav):not(.nav-backdrop){
  filter:blur(0);
  transition:filter 0.4s var(--ease);
}
input, textarea{ font-family:inherit; }

:focus-visible{
  outline: 1.5px solid var(--gray-soft);
  outline-offset: 4px;
}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

img{ max-width:100%; display:block; }

/* =========================================================
   Reveal / Fade utilities
========================================================= */
.reveal{
  opacity:0;
  transform:translateY(28px);
  transition:opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.is-visible{
  opacity:1;
  transform:translateY(0);
}

.fade-up{
  opacity:0;
  transform:translateY(22px);
  animation:fadeUp 0.9s var(--ease) forwards;
  animation-delay:var(--d, 0s);
}
@keyframes fadeUp{
  to{ opacity:1; transform:translateY(0); }
}

.eyebrow{
  font-family:var(--font-display);
  font-size:13px;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--gray);
  margin-bottom:16px;
  font-weight:500;
}

.section-title{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(2rem, 4vw, 2.75rem);
  letter-spacing:-0.02em;
  line-height:1.15;
}

.section-head{
  max-width:640px;
  margin-bottom:72px;
}

section{
  position:relative;
  padding:120px 0;
}

/* =========================================================
   Buttons
========================================================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:16px 32px;
  border-radius:100px;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:500;
  letter-spacing:0.01em;
  transition:transform 0.45s var(--ease), background 0.45s var(--ease), color 0.45s var(--ease), border-color 0.45s var(--ease), box-shadow 0.45s var(--ease);
  white-space:nowrap;
}

.btn-primary{
  background:var(--white);
  color:var(--black);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 30px -10px rgba(255,255,255,0.25);
}

.btn-secondary{
  background:transparent;
  color:var(--white);
  border:1px solid var(--border-strong);
}
.btn-secondary:hover{
  border-color:var(--white);
  transform:translateY(-2px);
}

/* =========================================================
   Navigation
========================================================= */
.nav{
  position:fixed;
  top:0; left:0; right:0;
  z-index:100;
  padding:26px 0;
  transition:padding 0.5s var(--ease), background 0.5s var(--ease), border-color 0.5s var(--ease), backdrop-filter 0.5s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  padding:16px 0;
  background:rgba(0,0,0,0.55);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--border);
}

.nav-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.nav-mark{
  font-family:var(--font-display);
  font-weight:600;
  font-size:16px;
  letter-spacing:0.04em;
}
.nav-mark span{
  color:var(--gray);
  margin-left:6px;
  font-weight:400;
}

.nav-links{
  display:flex;
  align-items:center;
  gap:40px;
}
.nav-link{
  font-size:14.5px;
  color:var(--gray-soft);
  position:relative;
  padding:4px 0;
  transition:color 0.3s var(--ease);
}
.nav-link::after{
  content:'';
  position:absolute;
  left:0; bottom:-2px;
  width:0; height:1px;
  background:var(--white);
  transition:width 0.35s var(--ease);
}
.nav-link:hover, .nav-link.active{ color:var(--white); }
.nav-link:hover::after, .nav-link.active::after{ width:100%; }

.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  width:28px;
  z-index:110;
}
.nav-toggle span{
  display:block;
  height:1.5px;
  width:100%;
  background:var(--white);
  transition:transform 0.4s var(--ease), opacity 0.4s var(--ease);
}
.nav-toggle.active span:nth-child(1){ transform:translateY(6.5px) rotate(45deg); }
.nav-toggle.active span:nth-child(2){ opacity:0; }
.nav-toggle.active span:nth-child(3){ transform:translateY(-6.5px) rotate(-45deg); }

/* =========================================================
   Hero
========================================================= */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding-top:140px;
  overflow:hidden;
}

.hero-summit{
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
}
.summit-svg{
  width:100%;
  height:100%;
  display:block;
}
.ridge{
  fill:none;
  stroke-width:1;
  vector-effect:non-scaling-stroke;
}
.ridge-1{ stroke:rgba(255,255,255,0.16); }
.ridge-2{ stroke:rgba(255,255,255,0.10); }
.ridge-3{ stroke:rgba(255,255,255,0.06); }

.ridge-1{ animation: driftSlow 26s ease-in-out infinite alternate; }
.ridge-2{ animation: driftSlow 34s ease-in-out infinite alternate; }
.ridge-3{ animation: driftSlow 42s ease-in-out infinite alternate; }

@keyframes driftSlow{
  from{ transform:translateY(0px); }
  to{ transform:translateY(-22px); }
}

.summit-node circle{
  fill:var(--white);
  opacity:0.7;
}
.summit-node{
  animation:pulse 3.2s ease-in-out infinite;
}
.summit-node:nth-of-type(2){ animation-delay:0.6s; }
.summit-node:nth-of-type(3){ animation-delay:1.2s; }
@keyframes pulse{
  0%, 100%{ opacity:0.25; }
  50%{ opacity:0.9; }
}

.hero-inner{
  position:relative;
  z-index:1;
  max-width:880px;
  margin:0 auto;
  padding:0 32px;
  text-align:center;
}

.hero-title{
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(2.6rem, 7.2vw, 5.4rem);
  letter-spacing:-0.03em;
  line-height:1.05;
}
.hero-title .line{ display:block; }
.hero-title em{
  font-style:normal;
  background:var(--gradient-highlight);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.hero-sub{
  margin:30px auto 0;
  max-width:560px;
  color:var(--gray-soft);
  font-size:18px;
  line-height:1.7;
}

.hero-actions{
  margin-top:44px;
  display:flex;
  gap:16px;
  justify-content:center;
  flex-wrap:wrap;
}

.hero-scroll-cue{
  position:absolute;
  bottom:40px;
  left:50%;
  transform:translateX(-50%);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  z-index:1;
}
.hero-scroll-cue span{
  font-size:11px;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--gray-dim);
}
.cue-line{
  width:1px;
  height:36px;
  background:linear-gradient(to bottom, var(--gray) 0%, transparent 100%);
  position:relative;
  overflow:hidden;
}
.cue-line::after{
  content:'';
  position:absolute;
  top:-100%; left:0;
  width:100%; height:100%;
  background:var(--white);
  animation:cueDrop 2.4s ease-in-out infinite;
}
@keyframes cueDrop{
  0%{ top:-100%; }
  60%{ top:100%; }
  100%{ top:100%; }
}

/* =========================================================
   Trust / Stats
========================================================= */
.trust{
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  background:var(--bg-1);
}
.trust-statement{
  font-family:var(--font-display);
  font-size:clamp(1.4rem, 2.6vw, 2rem);
  font-weight:500;
  letter-spacing:-0.01em;
  max-width:760px;
  margin:0 auto 80px;
  text-align:center;
  color:var(--gray-soft);
}

.stats{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:32px;
  text-align:center;
}
.stat{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:32px 12px;
  border-left:1px solid var(--border);
}
.stat:first-child{ border-left:none; }
.stat-number{
  font-family:var(--font-display);
  font-size:clamp(2.2rem, 4.4vw, 3.2rem);
  font-weight:600;
  letter-spacing:-0.02em;
}
.stat-label{
  font-size:13.5px;
  color:var(--gray);
  letter-spacing:0.02em;
}

/* =========================================================
   Services
========================================================= */
.service-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--border);
  border:1px solid var(--border);
}

.service-card{
  background:var(--black);
  padding:48px 36px;
  transition:background 0.5s var(--ease), transform 0.5s var(--ease);
  position:relative;
}
.service-card:hover{
  background:var(--bg-2);
}
.service-card:hover .service-icon{
  transform:translateY(-4px);
  color:var(--white);
  border-color:var(--border-strong);
}

.service-icon{
  width:48px; height:48px;
  border:1px solid var(--border);
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--gray-soft);
  margin-bottom:28px;
  transition:transform 0.5s var(--ease), color 0.5s var(--ease), border-color 0.5s var(--ease);
}
.service-icon svg{ width:22px; height:22px; }

.service-card h3{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:600;
  margin-bottom:12px;
  letter-spacing:-0.01em;
}
.service-card p{
  color:var(--gray);
  font-size:14.5px;
  line-height:1.7;
}

/* =========================================================
   Process Timeline
========================================================= */
.process{ background:var(--bg-1); }

.timeline{
  position:relative;
  max-width:760px;
  margin:0 auto;
}
.timeline-track{
  position:absolute;
  left:28px;
  top:8px;
  bottom:8px;
  width:1px;
  background:var(--border);
}
.timeline-fill{
  position:absolute;
  top:0; left:0;
  width:100%;
  height:0%;
  background:linear-gradient(to bottom, var(--white), var(--gray));
  transition:height 0.2s linear;
}

.timeline-step{
  position:relative;
  display:flex;
  gap:32px;
  padding:28px 0 28px 0;
  align-items:flex-start;
}
.step-index{
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  color:var(--black);
  background:var(--gray-dim);
  width:56px; height:56px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  z-index:1;
  transition:background 0.5s var(--ease), color 0.5s var(--ease), transform 0.5s var(--ease);
}
.timeline-step.is-visible .step-index{
  background:var(--white);
  color:var(--black);
}
.step-body h3{
  font-family:var(--font-display);
  font-size:20px;
  font-weight:600;
  margin-bottom:8px;
  padding-top:14px;
}
.step-body p{
  color:var(--gray);
  font-size:15px;
  max-width:440px;
}

/* =========================================================
   Portfolio
========================================================= */
.portfolio-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:28px;
}

.portfolio-card{
  border:1px solid var(--border);
  border-radius:18px;
  padding:28px;
  background:var(--bg-1);
  transition:transform 0.5s var(--ease), border-color 0.5s var(--ease), background 0.5s var(--ease);
}
.portfolio-card:hover{
  transform:translateY(-6px);
  border-color:var(--border-strong);
  background:var(--bg-2);
}

.portfolio-thumb{
  height:160px;
  border-radius:12px;
  margin-bottom:24px;
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.10), transparent 60%),
    linear-gradient(135deg, #111 0%, #000 100%);
  border:1px solid var(--border);
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
}
.portfolio-thumb::before{
  content:attr(data-glyph);
  font-family:var(--font-display);
  font-size:42px;
  font-weight:600;
  letter-spacing:-0.02em;
  color:rgba(255,255,255,0.14);
}
.portfolio-thumb::after{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(120deg, transparent 40%, rgba(255,255,255,0.06) 50%, transparent 60%);
  transform:translateX(-100%);
  transition:transform 0.8s var(--ease);
}
.portfolio-card:hover .portfolio-thumb::after{
  transform:translateX(100%);
}
.portfolio-thumb--img{
  background:none;
  padding:0;
  display:block;
}
.portfolio-thumb--img::before,
.portfolio-thumb--img::after{ display:none; }
.portfolio-thumb--img img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:top center;
  border-radius:12px;
}

.portfolio-cat{
  display:inline-block;
  font-size:12px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--gray);
  margin-bottom:10px;
}
.portfolio-card h3{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:600;
  margin-bottom:10px;
}
.portfolio-card p{
  color:var(--gray);
  font-size:14.5px;
  line-height:1.65;
  margin-bottom:22px;
}
.portfolio-link{
  font-size:14px;
  font-weight:500;
  color:var(--white);
  border-bottom:1px solid var(--border-strong);
  padding-bottom:3px;
  transition:border-color 0.3s var(--ease), letter-spacing 0.3s var(--ease);
}
.portfolio-link:hover{
  border-color:var(--white);
}

/* =========================================================
   Why Summitree
========================================================= */
.why{ background:var(--bg-1); }

.why-row{
  display:grid;
  grid-template-columns:160px 1fr;
  gap:48px;
  align-items:center;
  padding:48px 0;
  border-bottom:1px solid var(--border);
}
.why-row:last-child{ border-bottom:none; }
.why-reverse{
  direction:rtl;
}
.why-reverse .why-text{ direction:ltr; }
.why-reverse .why-num{ direction:ltr; text-align:right; }

.why-num{
  font-family:var(--font-display);
  font-size:64px;
  font-weight:600;
  color:transparent;
  -webkit-text-stroke:1px var(--border-strong);
  line-height:1;
}
.why-text h3{
  font-family:var(--font-display);
  font-size:24px;
  font-weight:600;
  margin-bottom:12px;
  letter-spacing:-0.01em;
}
.why-text p{
  color:var(--gray-soft);
  max-width:560px;
  font-size:15.5px;
  line-height:1.75;
}

/* =========================================================
   Contact
========================================================= */
.contact-grid{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:80px;
  align-items:start;
}

.contact-copy{
  color:var(--gray-soft);
  margin:24px 0 40px;
  max-width:420px;
  font-size:15.5px;
  line-height:1.7;
}

.contact-channels{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.contact-channels li{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding-bottom:18px;
  border-bottom:1px solid var(--border);
}
.contact-channels li:last-child{ border-bottom:none; }
.channel-label{
  font-size:12px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--gray);
}
.contact-channels a{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:500;
  transition:color 0.3s var(--ease);
}
.contact-channels a:hover{ color:var(--gray-soft); }

.contact-form{
  background:var(--bg-1);
  border:1px solid var(--border);
  border-radius:20px;
  padding:40px;
  display:flex;
  flex-direction:column;
  gap:22px;
}
.form-row{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.form-row label{
  font-size:13px;
  letter-spacing:0.04em;
  color:var(--gray);
}
.form-row input,
.form-row textarea{
  background:rgba(255,255,255,0.03);
  border:1px solid var(--border);
  border-radius:10px;
  padding:14px 16px;
  color:var(--white);
  font-size:15px;
  transition:border-color 0.3s var(--ease), background 0.3s var(--ease);
  resize:vertical;
}
.form-row input::placeholder,
.form-row textarea::placeholder{ color:var(--gray-dim); }
.form-row input:focus,
.form-row textarea:focus{
  border-color:var(--border-strong);
  background:rgba(255,255,255,0.05);
  outline:none;
}

.form-submit{
  margin-top:6px;
  width:100%;
}

.form-success{
  display:none;
  font-size:14px;
  color:var(--gray-soft);
  text-align:center;
  padding-top:6px;
}
.form-success.show{ display:block; }

/* =========================================================
   Footer
========================================================= */
.footer{
  border-top:1px solid var(--border);
  padding-top:72px;
  background:var(--black);
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  gap:48px;
  flex-wrap:wrap;
  padding-bottom:48px;
}
.footer-mark{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:600;
  letter-spacing:0.02em;
}
.footer-tagline{
  color:var(--gray);
  font-size:14px;
  margin-top:10px;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-links a{
  color:var(--gray-soft);
  font-size:14.5px;
  transition:color 0.3s var(--ease);
}
.footer-links a:hover{ color:var(--white); }
.footer-social{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-social a{
  color:var(--gray-soft);
  font-size:14.5px;
  transition:color 0.3s var(--ease);
}
.footer-social a:hover{ color:var(--white); }

.footer-bottom{
  border-top:1px solid var(--border);
  padding:24px 32px;
  text-align:center;
}
.footer-bottom p{
  color:var(--gray-dim);
  font-size:13px;
}

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 980px){
  .service-grid{ grid-template-columns:repeat(2, 1fr); }
  .portfolio-grid{ grid-template-columns:repeat(2, 1fr); }
  .contact-grid{ grid-template-columns:1fr; gap:56px; }
  .stats{ grid-template-columns:repeat(2, 1fr); gap:0; }
  .stat:nth-child(3){ border-left:none; }
}

@media (max-width: 760px){
  section{ padding:88px 0; }
  .container{ padding:0 24px; }
  .nav-inner{ padding:0 24px; }

  .nav-links{
    position:fixed;
    top:0; right:0;
    height:100vh;
    width:min(78vw, 320px);
    background:rgba(0,0,0,0.92);
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    flex-direction:column;
    justify-content:center;
    align-items:flex-start;
    gap:28px;
    padding:0 40px;
    border-left:1px solid var(--border);
    transform:translateX(100%);
    transition:transform 0.5s var(--ease);
    z-index:105;
    overflow-y:auto;
  }
  .nav-links.open{ transform:translateX(0); }
  .nav-link{ font-size:20px; }

  .nav-toggle{ display:flex; }

  .why-row{ grid-template-columns:1fr; gap:18px; }
  .why-num{ font-size:42px; }
  .why-reverse{ direction:ltr; }

  .service-grid{ grid-template-columns:1fr; }
  .portfolio-grid{ grid-template-columns:1fr; }
  .stats{ grid-template-columns:repeat(2, 1fr); }

  .footer-inner{ flex-direction:column; gap:32px; }
}

@media (max-width: 480px){
  .hero-actions{ flex-direction:column; width:100%; }
  .hero-actions .btn{ width:100%; }
  .stats{ grid-template-columns:1fr 1fr; }
  .contact-form{ padding:28px; }
}