/* ============================================================
   LYGHT SOURCE CONCEPTS — WEBSITE DESIGN SYSTEM
   Tokens derived from the approved Brand Guidelines.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500;700;800&family=Playfair+Display:ital,wght@1,500;1,600&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root{
  /* ---- Brand colour tokens (constant across themes) ---- */
  --navy:#091853;
  --navy-2:#122747;
  --slate:#4A5378;
  --slate-light:#8890AC;
  --orange:#FF5A10;
  --orange-dark:#D9440A;
  --peach:#F6CA9A;
  --paper:#F6F4EF;
  --paper-line:#E4E1D8;
  --white:#FFFFFF;
  --off-white:#FEFEFD;
  --navy-deep:#060C2A;

  /* ---- Semantic tokens — LIGHT (default) ---- */
  --bg:var(--off-white);
  --bg-alt:var(--paper);
  --surface:var(--white);
  --text:var(--navy);
  --text-muted:var(--slate);
  --text-faint:var(--slate-light);
  --accent:var(--orange);
  --border:var(--paper-line);
  --header-bg:rgba(254,254,253,0.88);
  --grid-line:rgba(9,24,83,0.035);
  --hero-ring:rgba(9,24,83,0.12);
  --hero-line:#4A5378;
  --toggle-ring:var(--navy);
  --toggle-glow:transparent;

  /* ---- 8pt spacing scale ---- */
  --s1:8px; --s2:16px; --s3:24px; --s4:32px; --s5:40px; --s6:48px; --s7:64px; --s8:80px; --s9:96px; --s10:120px;

  /* ---- Radii ---- */
  --radius-s:4px; --radius-m:8px; --radius-l:16px;

  /* ---- Layout ---- */
  --container-max:1200px;
  --header-h:100px;
}

[data-theme="dark"]{
  --bg:var(--navy-deep);
  --bg-alt:var(--navy-2);
  --surface:var(--navy-2);
  --text:var(--off-white);
  --text-muted:#AEB6D6;
  --text-faint:rgba(255,255,255,0.5);
  --border:rgba(255,255,255,0.14);
  --header-bg:rgba(6,12,42,0.82);
  --grid-line:rgba(255,255,255,0.05);
  --hero-ring:rgba(255,255,255,0.14);
  --hero-line:#8890AC;
  --toggle-ring:var(--orange);
  --toggle-glow:rgba(255,90,16,0.55);
}

@media (max-width:860px){
  :root{ --header-h:76px; }
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;overflow-x:clip;}
html.theme-ready, html.theme-ready *{
  transition:background-color .45s ease, color .45s ease, border-color .45s ease, box-shadow .45s ease;
}
@media (prefers-reduced-motion:reduce){
  html.theme-ready, html.theme-ready *{ transition:none; }
}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'Inter',sans-serif;
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:clip;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--s4);}

/* ---- Typography ---- */
h1,h2,h3,h4{font-family:'Poppins',sans-serif;font-weight:800;letter-spacing:-0.01em;margin:0;color:var(--text);}
h1{font-size:clamp(36px,5vw,64px);line-height:1.05;}
h2{font-size:clamp(28px,3.5vw,42px);line-height:1.1;}
h3{font-size:20px;line-height:1.3;font-weight:700;}
p{margin:0 0 var(--s2);color:var(--text-muted);}
.eyebrow{
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:500;
  margin-bottom:var(--s2);
}
.eyebrow::before{content:'';width:20px;height:1px;background:var(--accent);}
.accent-italic{font-family:'Playfair Display',serif;font-style:italic;font-weight:600;color:var(--accent);}
.mono{font-family:'JetBrains Mono',monospace;}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:15px 28px;border-radius:6px;border:none;
  font-family:'Inter',sans-serif;font-weight:600;font-size:15px;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px);box-shadow:0 8px 20px rgba(255,90,16,0.28);}
.btn-secondary{background:transparent;color:var(--text);border:1.5px solid var(--text);}
.btn-secondary:hover{background:var(--text);color:var(--bg);}
.btn-ghost{background:transparent;color:var(--white);border:1.5px solid rgba(255,255,255,0.4);}
.btn-ghost:hover{border-color:#fff;}
.btn-sm{padding:10px 18px;font-size:13px;}

/* ---- Header ---- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--header-bg);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
  height:var(--header-h);
  overflow-x:clip;
}
.site-header .container{height:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--s4);}
.site-header .container > a{flex-shrink:0;display:inline-flex;align-items:center;}
.logo-mark{height:36px;width:auto;}
.header-logo{height:56px;width:auto;flex:none;}
.main-nav{display:flex;align-items:center;gap:var(--s5);min-width:0;}
.main-nav ul{display:flex;gap:var(--s4);align-items:center;}
.main-nav a{font-weight:600;font-size:14.5px;color:var(--text);position:relative;padding:4px 0;}
.main-nav a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--accent);transition:width .2s ease;}
.main-nav a:hover::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:var(--s3);flex-shrink:0;}
.header-contact{display:flex;align-items:center;gap:var(--s3);font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--text-muted);flex-shrink:0;white-space:nowrap;}
.header-contact a:hover{color:var(--accent);}
.nav-toggle{display:none;background:none;border:none;padding:8px;flex-shrink:0;}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;}

/* ---- Theme toggle: power-button signature interaction ---- */
.theme-toggle{
  position:relative;
  width:42px;height:42px;flex:none;
  border-radius:50%;
  border:2px solid var(--toggle-ring);
  background:var(--bg-alt);
  display:flex;align-items:center;justify-content:center;
  transition:border-color .4s ease, box-shadow .4s ease, transform .3s ease, background .4s ease;
  box-shadow:0 0 0 0 var(--toggle-glow);
}
.theme-toggle:hover{transform:scale(1.05);}
.theme-toggle svg{width:18px;height:18px;overflow:visible;}
.theme-toggle .pw-ring{fill:none;stroke:var(--toggle-ring);stroke-width:2;stroke-linecap:round;transition:stroke .4s ease;}
.theme-toggle .pw-stem{stroke:var(--accent);stroke-width:2;stroke-linecap:round;transition:stroke .4s ease;}
[data-theme="dark"] .theme-toggle{box-shadow:0 0 14px 1px var(--toggle-glow);}
.theme-toggle.igniting{animation:ignite .55s ease;}
@keyframes ignite{
  0%{transform:scale(1) rotate(0deg);}
  35%{transform:scale(0.88) rotate(-8deg);}
  65%{transform:scale(1.12) rotate(6deg);}
  100%{transform:scale(1) rotate(0deg);}
}
@media (prefers-reduced-motion:reduce){
  .theme-toggle.igniting{animation:none;}
}

/* ---- Hero ---- */
.hero{
  position:relative;
  padding:var(--s9) 0 var(--s8);
  overflow:hidden;
  background:var(--bg);
}
.hero-grid{
  position:absolute;inset:0;
  background:
    repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 48px);
  pointer-events:none;
  mask-image:linear-gradient(180deg, black, transparent 85%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.1fr 0.9fr;gap:var(--s7);align-items:center;}
.hero h1{margin-bottom:var(--s3);}
.hero h1 .line2{display:block;color:var(--accent);}
.hero-lede{font-size:18px;max-width:520px;margin-bottom:var(--s5);}
.hero-actions{display:flex;gap:var(--s3);flex-wrap:wrap;margin-bottom:var(--s6);}
.hero-trust-inline{display:flex;gap:var(--s4);flex-wrap:wrap;font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--text-faint);}
.hero-trust-inline span{display:flex;align-items:center;gap:6px;}
.hero-trust-inline span::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent);}

/* Hero signature graphic: schematic power trace */
.hero-graphic{position:relative;aspect-ratio:1/1;}
.hero-graphic svg{width:100%;height:100%;}
.hg-ring{stroke:var(--hero-ring);fill:none;}
.hg-line{stroke:var(--hero-line);}

/* ---- Trust bar ---- */
.trust-bar{background:var(--navy);padding:var(--s4) 0;}
.trust-bar .container{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:var(--s3);}
.trust-bar-label{font-family:'JetBrains Mono',monospace;font-size:11.5px;color:rgba(255,255,255,0.5);text-transform:uppercase;letter-spacing:0.1em;}
.trust-items{display:flex;flex-wrap:wrap;gap:var(--s5);}
.trust-item{font-family:'JetBrains Mono',monospace;font-size:13px;color:#fff;font-weight:500;}

/* ---- Section shell ---- */
.section{padding:var(--s9) 0;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:640px;margin-bottom:var(--s7);}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

/* ---- Service pillars ---- */
.pillar-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--s3);}
.pillar-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-m);
  padding:var(--s4) var(--s3);transition:border-color .2s ease, transform .2s ease;
}
.pillar-card:hover{border-color:var(--accent);transform:translateY(-4px);}
.pillar-icon{width:44px;height:44px;border-radius:8px;background:var(--navy);position:relative;margin-bottom:var(--s3);display:flex;align-items:center;justify-content:center;}
.pillar-icon svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.pillar-card h3{margin-bottom:8px;font-size:16px;}
.pillar-card p{font-size:13.5px;margin-bottom:var(--s2);}
.pillar-link{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--accent);font-weight:500;display:inline-flex;align-items:center;gap:4px;}

/* ---- Stats ---- */
.stats-bar{background:var(--navy);padding:var(--s7) 0;}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s4);text-align:center;}
.stat-num{font-family:'Poppins',sans-serif;font-weight:800;font-size:clamp(32px,4vw,48px);color:#fff;line-height:1;margin-bottom:8px;}
.stat-num .accent-plus{color:var(--accent);}
.stat-label{font-family:'JetBrains Mono',monospace;font-size:12px;color:rgba(255,255,255,0.6);text-transform:uppercase;letter-spacing:0.06em;}

/* ---- Methodology strip ---- */
.method-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.method-step{padding:0 var(--s3);position:relative;}
.method-step:not(:last-child)::after{
  content:'';position:absolute;top:18px;right:calc(-1 * var(--s3) / 2);width:var(--s3);height:1px;
  background:repeating-linear-gradient(90deg, var(--accent) 0 6px, transparent 6px 10px);
}
.method-num{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--accent);font-weight:700;margin-bottom:var(--s2);}
.method-step h3{font-size:16px;margin-bottom:6px;}
.method-step p{font-size:13.5px;}

/* ---- Project cards ---- */
.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s3);}
.project-card{border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--border);background:var(--surface);}
.project-thumb{aspect-ratio:4/3;background:var(--navy);position:relative;overflow:hidden;}
.project-thumb svg{width:100%;height:100%;}
.project-tag{
  position:absolute;top:14px;left:14px;background:rgba(9,24,83,0.85);color:#fff;
  font-family:'JetBrains Mono',monospace;font-size:10.5px;text-transform:uppercase;letter-spacing:0.05em;
  padding:5px 10px;border-radius:4px;
}
.project-body{padding:var(--s3);}
.project-body h3{margin-bottom:6px;font-size:16px;}
.project-body p{font-size:13.5px;margin-bottom:var(--s2);}
.project-meta{display:flex;gap:var(--s3);font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-faint);}

.testimonial-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s3);}
@media (max-width:860px){ .testimonial-grid{grid-template-columns:1fr;} }
.testimonial-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-m);
  padding:var(--s5);position:relative;
}
.testimonial-quote{font-family:'Playfair Display',serif;font-style:italic;font-size:19px;color:var(--text);line-height:1.5;margin-bottom:var(--s4);}
.testimonial-author{display:flex;align-items:center;gap:var(--s2);}
.testimonial-avatar{width:44px;height:44px;border-radius:50%;background:var(--peach);flex:none;}
.testimonial-name{font-weight:700;font-size:14px;color:var(--text);}
.testimonial-role{font-family:'JetBrains Mono',monospace;font-size:11.5px;color:var(--text-faint);}

/* ---- CTA banner ---- */
.cta-banner{
  background:var(--navy);border-radius:var(--radius-l);padding:var(--s7) var(--s7);
  display:flex;align-items:center;justify-content:space-between;gap:var(--s4);flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-banner h2{color:#fff;max-width:520px;}
.cta-banner p{color:rgba(255,255,255,0.7);max-width:480px;}

/* ---- Footer ---- */
.site-footer{background:var(--navy);color:rgba(255,255,255,0.7);padding-top:var(--s9);}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:var(--s5);padding-bottom:var(--s7);border-bottom:1px solid rgba(255,255,255,0.12);}
.footer-brand{margin-bottom:var(--s2);}
.footer-logo{height:64px;width:auto;margin-bottom:var(--s5);}
.footer-brand p{color:rgba(255,255,255,0.55);font-size:13.5px;max-width:280px;}
.footer-col h4{color:#fff;font-family:'Poppins',sans-serif;font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:0.06em;margin-bottom:var(--s3);}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{color:rgba(255,255,255,0.6);font-size:13.5px;}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:var(--s4) 0;flex-wrap:wrap;gap:var(--s2);}
.footer-bottom .mono{font-size:11.5px;color:rgba(255,255,255,0.45);}
.footer-badges{display:flex;gap:var(--s2);flex-wrap:wrap;}
.footer-badge{
  font-family:'JetBrains Mono',monospace;font-size:10.5px;color:rgba(255,255,255,0.7);
  border:1px solid rgba(255,255,255,0.2);padding:5px 10px;border-radius:4px;
}

/* ---- Floating utility buttons ---- */
.float-stack{position:fixed;right:24px;bottom:24px;z-index:200;display:flex;flex-direction:column;gap:12px;align-items:flex-end;}
.float-btn{
  width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(9,24,83,0.25);transition:transform .15s ease;
}
.float-btn:hover{transform:scale(1.06);}
.float-whatsapp{background:#25D366;}
.float-quote-mobile{display:none;}

/* ---- Placeholder content notice (dev-only, remove before launch) ---- */
.placeholder-flag{
  position:absolute;top:8px;right:8px;background:rgba(255,90,16,0.92);color:#fff;
  font-family:'JetBrains Mono',monospace;font-size:9.5px;padding:3px 7px;border-radius:3px;
  text-transform:uppercase;letter-spacing:0.05em;z-index:2;
}

/* ---- Reveal on scroll ---- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease, transform .6s ease;}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ---- Responsive ---- */
@media (max-width:1240px){
  .header-contact{display:none;}
  .main-nav{gap:var(--s3);}
  .main-nav ul{gap:var(--s3);}
}
@media (max-width:1080px){
  .pillar-grid{grid-template-columns:repeat(3,1fr);}
  .project-grid{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:var(--s5);}
  .footer-grid{grid-template-columns:1fr 1fr;row-gap:var(--s5);}
}
@media (max-width:860px){
  .hero{padding:var(--s5) 0 var(--s6);}
  .hero-inner{grid-template-columns:1fr;}
  .hero-graphic{max-width:280px;margin:var(--s5) auto 0;}
  .header-logo{height:48px;}
  .header-actions{gap:var(--s2);}
  .header-actions > a.btn-primary.btn-sm{display:none;}
  .main-nav{position:fixed;top:var(--header-h);left:0;right:0;bottom:0;background:var(--bg);
    flex-direction:column;align-items:flex-start;padding:var(--s5) var(--s4);transform:translateX(100%);
    transition:transform .25s ease;overflow-y:auto;}
  .main-nav.open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;align-items:flex-start;gap:var(--s3);width:100%;}
  .main-nav a{font-size:18px;}
  .header-contact{display:none;}
  .nav-toggle{display:block;}
  .pillar-grid{grid-template-columns:1fr 1fr;}
  .method-strip{grid-template-columns:1fr 1fr;row-gap:var(--s5);}
  .method-step:nth-child(2)::after{display:none;}
  .float-quote-mobile{display:flex;}
}
@media (max-width:600px){
  .hero{padding:var(--s4) 0 var(--s5);}
  .pillar-grid{grid-template-columns:1fr;}
  .project-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-banner{flex-direction:column;align-items:flex-start;padding:var(--s5);}
}