/* ==========================================================================
   Asthra Inc — design tokens
   ========================================================================== */
:root{
  --bg:            #14100e;
  --bg-alt:        #1a1512;
  --surface:       #201914;
  --surface-hi:    #2a201a;
  --border:        #382c25;
  --border-soft:   #2a221c;

  --ember-red:     #d43827;
  --ember-orange:  #f16622;
  --ember-light:   #ffa552;

  --text:          #f5ede5;
  --text-muted:    #af9c8e;
  --text-dim:      #97877c;

  --font-display:  'Space Grotesk', sans-serif;
  --font-body:     'Inter', sans-serif;
  --font-mono:     'IBM Plex Mono', monospace;

  --container:     1180px;
  --radius:        2px;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,p{ margin:0; }
button{ font-family: inherit; cursor:pointer; }
input, textarea{ font-family: inherit; }

::selection{ background: var(--ember-red); color:#fff; }

.skip-link{
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 200;
  background: var(--ember-orange);
  color: #14100e;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: var(--radius);
  transition: top .2s ease;
}
.skip-link:focus{ top: 16px; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible{
  outline: 2px solid var(--ember-orange);
  outline-offset: 3px;
}
.btn:focus-visible{ outline-offset: 4px; }
.back-to-top:focus-visible{
  opacity: 1;
  visibility: visible;
  outline: 2px solid var(--ember-orange);
  outline-offset: 4px;
  border-radius: 50%;
}

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

/* ==========================================================================
   Utility
   ========================================================================== */
.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.eyebrow{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ember-orange);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before{
  content:'';
  width: 22px;
  height: 1px;
  background: var(--ember-orange);
  display:inline-block;
}
.section-head{
  max-width: 640px;
  margin-bottom: 56px;
}
.section-head h2{
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}
.section-head p{
  color: var(--text-muted);
  font-size: 16.5px;
  max-width: 560px;
}
section{ padding: 118px 0; position:relative; }
.bg-alt{ background: var(--bg-alt); }
.grad-text{
  background: linear-gradient(100deg, var(--ember-red), var(--ember-orange) 55%, var(--ember-light));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 15px 26px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn-primary{
  background: linear-gradient(95deg, var(--ember-red), var(--ember-orange));
  color: #100c0a;
  font-weight: 600;
  box-shadow: 0 8px 24px -8px rgba(241,102,34,0.55);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 12px 28px -8px rgba(241,102,34,0.7); }
.btn-ghost{
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover{ border-color: var(--ember-orange); color: var(--ember-light); }
.btn svg{ width:14px; height:14px; }

.reveal{ opacity:0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible{ opacity:1; transform:none; }

/* ==========================================================================
   Nav
   ========================================================================== */
.site-nav{
  position: fixed;
  top:0; left:0; right:0;
  z-index: 100;
  padding: 22px 0;
  transition: background .3s ease, padding .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.site-nav.scrolled{
  padding: 14px 0;
  background: rgba(20,16,14,0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.site-nav .container{
  display:flex;
  align-items:center;
  justify-content: space-between;
}
.brand{ display:flex; align-items:center; }
.brand img{ height: 36px; width:auto; }
.nav-links{
  display:flex;
  align-items:center;
  gap: 34px;
}
.nav-links a{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  position:relative;
  padding: 4px 0;
  transition: color .2s ease;
}
.nav-links a:hover, .nav-links a.active{ color: var(--text); }
.nav-links a.active::after{
  content:'';
  position:absolute;
  left:0; right:0; bottom:-4px;
  height:1px;
  background: linear-gradient(90deg, var(--ember-red), var(--ember-orange));
}
.nav-cta{ display:flex; align-items:center; gap:22px; }
.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;
  border:none;
  padding: 12px 10px;
}
.nav-toggle span{ width:22px; height:2px; background: var(--text); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  min-height: 100vh;
  display:flex;
  align-items:center;
  padding-top: 110px;
  overflow:hidden;
  position:relative;
}
.hero::before{
  content:'';
  position:absolute; inset:0;
  background:
    radial-gradient(700px 420px at 82% 18%, rgba(212,56,39,0.16), transparent 65%),
    radial-gradient(520px 420px at 100% 85%, rgba(241,102,34,0.10), transparent 65%);
  pointer-events:none;
}
.hero-grid{
  position: relative;
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items:center;
}
.hero-eyebrow{ margin-bottom: 26px; }
.hero h1{
  font-family: var(--font-display);
  font-size: clamp(38px, 5vw, 62px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin-bottom: 26px;
}
.hero p.lede{
  font-size: 18px;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 40px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom: 64px; }
.hero-stats{
  display:flex;
  gap: 42px;
  border-top: 1px solid var(--border-soft);
  padding-top: 28px;
}
.hero-stats div strong{
  display:block;
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--text);
}
.hero-stats div span{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.hero-visual{ position:relative; }
.hero-visual svg{ width:100%; height:auto; }
.hero-visual .logo-mark{
  position:absolute;
  left:50%; top:50%;
  transform: translate(-50%,-56%);
  width: 50%;
  filter: drop-shadow(0 18px 40px rgba(212,56,39,0.35));
}

.signal-path{
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: draw 2.6s cubic-bezier(.4,0,.2,1) forwards .3s;
}
@keyframes draw{ to{ stroke-dashoffset: 0; } }
.signal-dot{
  animation: pulse 2.4s ease-in-out infinite;
  transform-origin: center;
}
@keyframes pulse{
  0%,100%{ opacity:.55; r:4; }
  50%{ opacity:1; r:6.5; }
}

.scroll-cue{
  position:absolute;
  bottom: 34px; left: 32px;
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform:uppercase;
  color: var(--text-dim);
}
.scroll-cue .line{
  width:1px; height:34px;
  background: linear-gradient(var(--ember-orange), transparent);
}

/* ==========================================================================
   About
   ========================================================================== */
.about-copy{
  display:grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  margin-bottom: 78px;
}
.about-copy p{ color: var(--text-muted); margin-bottom: 18px; font-size: 16px; }
.about-copy p:last-child{ margin-bottom:0; }

.info-cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  margin-bottom: 78px;
}
.info-card{
  background: var(--bg);
  padding: 34px 30px;
}
.info-card .idx{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ember-orange);
  margin-bottom: 18px;
  display:block;
}
.info-card h3{
  font-family: var(--font-display);
  font-size: 19px;
  font-weight:600;
  margin-bottom: 12px;
}
.info-card p{ color: var(--text-muted); font-size: 14.5px; }

.stat-strip{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
}
.stat-strip div{ border-left: 1px solid var(--border); padding-left: 20px; }
.stat-strip strong{
  display:block;
  font-family: var(--font-display);
  font-size: 34px;
  background: linear-gradient(95deg, var(--ember-red), var(--ember-light));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.stat-strip span{
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
  letter-spacing: .04em;
  text-transform:uppercase;
}

/* ==========================================================================
   AI Practice — signature section
   ========================================================================== */
#ai{
  background:
    radial-gradient(900px 500px at 10% 0%, rgba(212,56,39,0.10), transparent 60%),
    var(--bg);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.ai-intro{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 70px;
  align-items:end;
}
.ai-intro p{ color: var(--text-muted); font-size: 16.5px; }

.ai-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  margin-bottom: 90px;
}
.ai-card{
  background: var(--surface);
  padding: 38px 32px;
  transition: background .25s ease;
  position:relative;
}
.ai-card:hover{ background: var(--surface-hi); }
.ai-card .icon{
  width: 40px; height:40px;
  margin-bottom: 26px;
  color: var(--ember-orange);
}
.ai-card .icon svg{ width:100%; height:100%; }
.ai-card h3{
  font-family: var(--font-display);
  font-size: 18.5px;
  font-weight:600;
  margin-bottom: 12px;
}
.ai-card p{ color: var(--text-muted); font-size: 14.5px; }

.ai-flow{
  position:relative;
}
.ai-flow-label{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color: var(--text-dim);
  margin-bottom: 30px;
}
.ai-flow-steps{
  display:grid;
  grid-template-columns: repeat(4,1fr);
  gap: 24px;
  position:relative;
}
.ai-flow-steps::before{
  content:'';
  position:absolute;
  top: 11px; left:0; right:0;
  height:1px;
  background: linear-gradient(90deg, var(--ember-red), var(--ember-orange), var(--ember-light));
  opacity:.35;
}
.ai-flow-step{ position:relative; padding-top: 40px; }
.ai-flow-step::before{
  content:'';
  position:absolute;
  top:0; left:0;
  width:11px; height:11px;
  border-radius:50%;
  background: var(--bg);
  border: 2px solid var(--ember-orange);
}
.ai-flow-step h4{
  font-family: var(--font-display);
  font-size: 16px;
  margin-bottom: 8px;
}
.ai-flow-step p{ font-size: 13.5px; color: var(--text-muted); }

/* ==========================================================================
   Services
   ========================================================================== */
.services-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}
.service-card{
  background: var(--bg);
  padding: 36px 32px;
}
.service-card .icon{
  width: 34px; height:34px;
  margin-bottom: 22px;
  color: var(--text-muted);
}
.service-card .icon svg{ width:100%; height:100%; }
.service-card h3{
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight:600;
  margin-bottom: 10px;
}
.service-card p{ color: var(--text-muted); font-size: 14px; }

/* ==========================================================================
   Process
   ========================================================================== */
.process-list{ counter-reset: step; }
.process-item{
  display:grid;
  grid-template-columns: 90px 1fr;
  gap: 32px;
  padding: 34px 0;
  border-top: 1px solid var(--border-soft);
  align-items:start;
}
.process-item:last-child{ border-bottom: 1px solid var(--border-soft); }
.process-num{
  font-family: var(--font-display);
  font-size: 34px;
  color: var(--text-dim);
}
.process-body h3{
  font-family: var(--font-display);
  font-size: 20px;
  font-weight:600;
  margin-bottom: 8px;
}
.process-body p{ color: var(--text-muted); max-width: 620px; }
.process-tag{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color: var(--ember-orange);
  margin-left: 14px;
}

/* ==========================================================================
   Industries
   ========================================================================== */
.industries-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}
.industry-card{
  background: var(--surface);
  padding: 34px 30px;
  min-height: 210px;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
}
.industry-card .tag{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing:.08em;
  text-transform:uppercase;
}
.industry-card h3{
  font-family: var(--font-display);
  font-size: 19px;
  font-weight:600;
  margin: 30px 0 12px;
}
.industry-card p{ color: var(--text-muted); font-size: 14px; }

/* ==========================================================================
   Careers
   ========================================================================== */
.careers-top{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap: 30px;
  margin-bottom: 56px;
  flex-wrap:wrap;
}
.careers-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.careers-col h3{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color: var(--ember-orange);
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-soft);
}
.careers-col ul li{
  padding: 14px 0;
  border-bottom: 1px solid var(--border-soft);
  font-family: var(--font-display);
  font-size: 15.5px;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.careers-col ul li span{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
}

/* ==========================================================================
   Contact
   ========================================================================== */
.contact-grid{
  display:grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 70px;
}
.contact-info p{ color: var(--text-muted); margin-bottom: 30px; }
.contact-detail{ margin-bottom: 26px; }
.contact-detail .label{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.contact-detail a, .contact-detail div.val{ font-family: var(--font-display); font-size: 17px; }

.form-row{ display:grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom:20px; }
.field label{
  display:block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.field input, .field textarea{
  width:100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 15px;
  transition: border-color .2s ease;
}
.field input:focus, .field textarea:focus{
  outline: none;
  border-color: var(--ember-orange);
}
.field{ margin-bottom: 20px; }
.form-status{
  font-family: var(--font-mono);
  font-size: 13px;
  margin-top: 16px;
  min-height: 20px;
  color: var(--ember-light);
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer{
  border-top: 1px solid var(--border-soft);
  padding: 40px 0;
}
footer .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap: 18px;
}
footer .brand img{ height:26px; opacity:.85; }

/* ==========================================================================
   Back to top
   ========================================================================== */
.back-to-top{
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 90;
  width: 34px;
  height: 34px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: transparent;
  border: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s ease, transform .3s ease, visibility .3s;
}
.back-to-top.visible{
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top img{
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 6px 16px rgba(212,56,39,0.4));
  transition: transform .25s ease, filter .25s ease;
}
.back-to-top:hover img{
  transform: translateY(-3px);
  filter: drop-shadow(0 10px 20px rgba(241,102,34,0.55));
}
@media (max-width: 720px){
  .back-to-top{ right: 18px; bottom: 18px; width: 28px; height: 28px; }
}
footer p{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}
.footer-links{ display:flex; gap:22px; }
.footer-links a{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  transition: color .2s ease;
}
.footer-links a:hover{ color: var(--ember-orange); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns:1fr; }
  .hero-visual{ order:-1; max-width: 340px; margin: 0 auto 20px; }
  .about-copy{ grid-template-columns:1fr; gap: 30px; }
  .info-cards{ grid-template-columns:1fr; }
  .ai-intro{ grid-template-columns:1fr; gap:24px; }
  .ai-grid{ grid-template-columns: 1fr 1fr; }
  .ai-flow-steps{ grid-template-columns:1fr 1fr; row-gap: 34px; }
  .services-grid{ grid-template-columns: 1fr 1fr; }
  .industries-grid{ grid-template-columns: 1fr 1fr; }
  .careers-grid{ grid-template-columns: 1fr; gap: 30px; }
  .contact-grid{ grid-template-columns: 1fr; gap: 40px; }
  .stat-strip{ grid-template-columns: 1fr 1fr; row-gap: 24px; }
}
@media (max-width: 720px){
  section{ padding: 84px 0; }
  .container{ padding: 0 22px; }
  .nav-links{
    position: fixed;
    top: 62px; left:0; right:0;
    background: rgba(20,16,14,0.98);
    flex-direction:column;
    align-items:flex-start;
    padding: 26px 22px;
    gap: 20px;
    border-bottom: 1px solid var(--border-soft);
    transform: translateY(-130%);
    transition: transform .3s ease;
  }
  .nav-links.open{ transform: translateY(0); }
  .nav-toggle{ display:flex; }
  .nav-cta .btn-primary{ display:none; }
  .hero-stats{ flex-wrap:wrap; gap: 26px; }
  .ai-grid{ grid-template-columns: 1fr; }
  .ai-flow-steps{ grid-template-columns: 1fr; }
  .services-grid{ grid-template-columns: 1fr; }
  .industries-grid{ grid-template-columns: 1fr; }
  .form-row{ grid-template-columns: 1fr; }
  .process-item{ grid-template-columns: 50px 1fr; }
  footer .container{ flex-direction:column; text-align:center; }
}