/* ==========================================================================
   PERFORMA DIGITECH — DESIGN SYSTEM
   Concept: Dehradun skyline as a growth chart. "Performance" made literal.
   ========================================================================== */

:root{
  /* Color */
  --ink:        #0B1220;   /* near-black navy — dark sections, headlines */
  --ink-soft:   #16213A;   /* raised dark surface */
  --paper:      #F6F5F0;   /* warm off-white — main background */
  --paper-dim:  #EDEBE3;   /* card surface on paper */
  --growth:     #C6FF4D;   /* chartreuse — the "up and to the right" accent */
  --amber:      #FF8A3D;   /* warm accent — CTAs, warmth */
  --slate:      #4A5568;   /* muted body text on paper */
  --slate-lite: #8B93A7;   /* muted text on ink */
  --line:       #DEDBD0;   /* hairline dividers on paper */
  --line-dark:  #26314B;   /* hairline dividers on ink */

  /* Type */
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body:    'Inter', 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  --radius: 4px;
}

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

html{ scroll-behavior:smooth; }

body{
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }

.wrap{
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Typography ---------- */
h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
}
h1{ font-size: clamp(2.4rem, 5vw, 4.4rem); }
h2{ font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
h3{ font-size: 1.25rem; }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

p{ color: var(--slate); max-width: 60ch; }
.on-ink p{ color: var(--slate-lite); }

/* ---------- Header / Nav ---------- */
.site-header{
  position: sticky; top:0; z-index: 100;
  background: rgba(246,245,240,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: 18px 32px;
  max-width: 1180px; margin:0 auto;
}
.logo{
  font-family: var(--font-display);
  font-weight:700; font-size:1.15rem;
  display:flex; align-items:center; gap:8px;
}
.logo-mark{
  width:10px; height:10px; background:var(--growth);
  display:inline-block; border-radius:1px;
}
.nav-links{ display:flex; gap:36px; }
.nav-links a{
  font-size: 0.92rem; font-weight:500; color: var(--ink);
  position:relative; padding: 4px 0;
}
.nav-links a::after{
  content:''; position:absolute; left:0; bottom:0;
  width:0; height:2px; background:var(--amber);
  transition: width .2s ease;
}
.nav-links a:hover::after{ width:100%; }
.nav-cta{
  background: var(--ink); color: var(--paper) !important;
  padding: 10px 20px; border-radius: var(--radius);
  font-size:0.88rem; font-weight:600;
}
.nav-cta::after{ display:none; }
.nav-toggle{ display:none; background:none; border:none; cursor:pointer; }
.nav-toggle span{ display:block; width:24px; height:2px; background:var(--ink); margin:5px 0; }

@media (max-width: 860px){
  .nav-links{
    position:fixed; inset: 64px 0 0 0; background: var(--paper);
    flex-direction:column; padding: 32px; gap:24px;
    transform: translateY(-110%); transition: transform .25s ease;
  }
  .nav-links.open{ transform: translateY(0); }
  .nav-toggle{ display:block; }
}

/* ---------- Hero (skyline-as-growth-chart) ---------- */
.hero{
  background: var(--ink); color: var(--paper);
  position:relative; overflow:hidden;
  padding: 96px 0 0;
}
.hero-inner{
  max-width:1180px; margin:0 auto; padding: 0 32px;
  display:grid; gap:24px;
}
.hero h1{ color:#fff; max-width: 16ch; }
.hero .lede{ color: var(--slate-lite); font-size:1.05rem; max-width:52ch; margin-top:18px; }
.hero-ctas{ display:flex; gap:16px; margin-top: 32px; flex-wrap:wrap; }

.btn{
  display:inline-block; padding: 13px 26px; border-radius: var(--radius);
  font-weight:600; font-size:0.92rem; transition: transform .15s ease, background .15s ease;
}
.btn-primary{ background: var(--growth); color: var(--ink); }
.btn-primary:hover{ transform: translateY(-2px); }
.btn-ghost{ border:1px solid var(--line-dark); color:#fff; }
.btn-ghost:hover{ border-color: var(--growth); color: var(--growth); }

.skyline-chart{ width:100%; height:auto; margin-top:56px; display:block; }
.skyline-label{
  font-family: var(--font-mono); font-size: 0.7rem;
  fill: var(--growth); letter-spacing:0.04em;
}
.skyline-dim{ fill: var(--slate-lite); font-family: var(--font-mono); font-size:0.65rem; }

/* ---------- Stats strip ---------- */
.stats{
  background: var(--ink-soft); color:#fff;
  border-top:1px solid var(--line-dark);
}
.stats-grid{
  display:grid; grid-template-columns: repeat(4,1fr); gap:24px;
  padding: 36px 0;
}
.stat-num{ font-family: var(--font-mono); font-size:1.9rem; color: var(--growth); }
.stat-label{ font-size:0.78rem; color: var(--slate-lite); margin-top:4px; }
@media (max-width:760px){ .stats-grid{ grid-template-columns: repeat(2,1fr); } }

/* ---------- Sections ---------- */
section{ padding: 88px 0; }
.section-head{ max-width: 640px; margin-bottom: 48px; }
.section-head h2{ margin-top:10px; }

/* Services */
.services-grid{
  display:grid; grid-template-columns: repeat(3,1fr); gap:1px;
  background: var(--line); border:1px solid var(--line);
}
.service-card{
  background: var(--paper); padding: 32px 28px;
  transition: background .15s ease;
}
.service-card:hover{ background: var(--paper-dim); }
.service-card .eyebrow{ color: var(--slate); }
.service-card h3{ margin: 14px 0 10px; }
.service-card p{ font-size:0.94rem; }
@media (max-width:860px){ .services-grid{ grid-template-columns: 1fr; } }

/* Portfolio */
.work-grid{ display:grid; grid-template-columns: repeat(2,1fr); gap:24px; }
.work-card{
  border:1px solid var(--line); border-radius: var(--radius); overflow:hidden;
  background:#fff;
}
.work-thumb{
  aspect-ratio: 16/9; background: var(--ink-soft);
  display:flex; align-items:center; justify-content:center;
  color: var(--growth); font-family: var(--font-mono); font-size:0.8rem;
}
.work-body{ padding: 22px 24px; }
.work-tag{ font-family: var(--font-mono); font-size:0.7rem; color: var(--amber); letter-spacing:0.08em; }
.work-body h3{ margin: 8px 0 6px; }
@media (max-width:760px){ .work-grid{ grid-template-columns: 1fr; } }

/* CTA band */
.cta-band{
  background: var(--growth); color: var(--ink);
  text-align:center; padding: 72px 32px; border-radius: 4px;
}
.cta-band h2{ max-width:20ch; margin:0 auto 18px; }
.cta-band .btn-primary{ background: var(--ink); color:#fff; }

/* Forms */
.form-grid{ display:grid; grid-template-columns: 1.1fr 0.9fr; gap:56px; }
form .field{ margin-bottom:20px; }
form label{ display:block; font-size:0.82rem; font-weight:600; margin-bottom:6px; }
form input, form textarea, form select{
  width:100%; padding: 12px 14px; border:1px solid var(--line);
  border-radius: var(--radius); font-family: var(--font-body); font-size:0.95rem;
  background:#fff;
}
form input:focus, form textarea:focus, form select:focus{
  outline: 2px solid var(--amber); outline-offset:1px;
}
.contact-info{ border-left:1px solid var(--line); padding-left:40px; }
.contact-info .item{ margin-bottom:24px; }
.contact-info .eyebrow{ color:var(--slate); }
@media (max-width:860px){
  .form-grid{ grid-template-columns:1fr; }
  .contact-info{ border-left:none; padding-left:0; border-top:1px solid var(--line); padding-top:32px; }
}

/* ---------- Footer ---------- */
footer{ background: var(--ink); color: var(--slate-lite); padding: 64px 0 32px; }
.footer-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap:40px; margin-bottom:48px; }
.footer-grid h4{ color:#fff; font-size:0.85rem; margin-bottom:14px; }
.footer-grid li{ margin-bottom:10px; font-size:0.9rem; }
.footer-grid a:hover{ color: var(--growth); }
.footer-bottom{
  border-top:1px solid var(--line-dark); padding-top:24px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  font-size:0.78rem; font-family: var(--font-mono);
}
@media (max-width:760px){ .footer-grid{ grid-template-columns:1fr; } }

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ transition:none !important; }
}

/* Keyboard focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--amber); outline-offset:2px;
}