/* =========================================================
   Mahendran CK — Personal Profile / Resume Site
   Light, credibility-first. Deliberately distinct from MDCS.
   ========================================================= */
:root{
  --bg:#f8f9fb;
  --surface:#ffffff;
  --surface-2:#f1f3f7;
  --border:#e3e7ee;
  --border-strong:#cdd3e0;
  --ink:#101828;
  --ink-muted:#475467;
  --ink-faint:#8792a6;
  --teal:#0d9488;
  --teal-dark:#0b7c72;
  --amber:#b45309;
  --font-head:'Space Grotesk', -apple-system, sans-serif;
  --font-body:'Inter', -apple-system, sans-serif;
  --radius:10px;
  --radius-sm:6px;
  --ease:cubic-bezier(0.16,1,0.3,1);
  --container:1100px;
}

*,*::before,*::after{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%; display:block;}
a{color:inherit; text-decoration:none;}
ul{list-style:none;}
button{font-family:inherit; cursor:pointer;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.001ms !important; transition-duration:0.001ms !important; scroll-behavior:auto !important;}
}

.container{width:100%; max-width:var(--container); margin:0 auto; padding:0 24px;}
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
@media (max-width:768px){.section{padding:60px 0;} .section-tight{padding:40px 0;}}

h1,h2,h3,h4{font-family:var(--font-head); font-weight:600; letter-spacing:-0.01em; line-height:1.18; color:var(--ink);}
.section-title{font-size:30px; margin-bottom:8px;}
.section-sub{color:var(--ink-muted); font-size:15.5px; margin-bottom:40px; max-width:640px;}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12.5px; font-weight:600; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--teal); margin-bottom:10px;
}
.eyebrow::before{content:""; width:18px; height:2px; background:var(--teal);}

/* =========================================================
   Navbar
   ========================================================= */
.navbar{
  position:sticky; top:0; z-index:1000;
  background:rgba(248,249,251,0.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  padding:16px 0;
}
.nav-inner{display:flex; align-items:center; justify-content:space-between; gap:20px;}
.brand{font-family:var(--font-head); font-weight:600; font-size:17px; display:flex; align-items:center; gap:10px;}
.brand-mark{
  width:34px; height:34px; border-radius:50%;
  background:linear-gradient(135deg, var(--teal), var(--teal-dark));
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-size:14px; font-weight:700;
}
.nav-links{display:flex; align-items:center; gap:28px;}
.nav-links a{font-size:14px; font-weight:500; color:var(--ink-muted); transition:color .2s;}
.nav-links a:hover{color:var(--teal);}
.nav-actions{display:flex; align-items:center; gap:10px;}
.nav-toggle{
  display:none; width:36px; height:36px; border-radius:8px;
  border:1px solid var(--border-strong); background:var(--surface);
  align-items:center; justify-content:center; color:var(--ink);
}
.nav-toggle svg{width:19px; height:19px;}
@media (max-width:860px){
  .nav-links{
    position:fixed; top:0; right:0; height:100vh; width:min(300px,82vw);
    background:var(--surface); border-left:1px solid var(--border);
    flex-direction:column; align-items:flex-start; gap:4px; padding:96px 26px 26px;
    transform:translateX(100%); transition:transform .35s var(--ease);
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{width:100%; padding:12px 0; font-size:15px;}
  .nav-toggle{display:flex;}
  .nav-actions .btn-text{display:none;}
}

/* =========================================================
   Buttons
   ========================================================= */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:12px 22px; border-radius:var(--radius-sm);
  font-weight:600; font-size:14px; border:1px solid transparent;
  transition:transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
  white-space:nowrap;
}
.btn svg{width:16px; height:16px;}
.btn-primary{background:var(--teal); color:#fff; box-shadow:0 8px 20px -8px rgba(13,148,136,0.5);}
.btn-primary:hover{background:var(--teal-dark); transform:translateY(-1px);}
.btn-secondary{background:var(--surface); color:var(--ink); border-color:var(--border-strong);}
.btn-secondary:hover{border-color:var(--teal); color:var(--teal); transform:translateY(-1px);}
.btn-sm{padding:9px 16px; font-size:13px;}

/* =========================================================
   Hero
   ========================================================= */
.hero{padding:72px 0 64px; border-bottom:1px solid var(--border);}
.hero-inner{display:flex; flex-direction:column; align-items:flex-start; gap:22px;}
.hero-avatar{
  width:76px; height:76px; border-radius:50%;
  background:linear-gradient(135deg, var(--teal), #14b8a6);
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-family:var(--font-head); font-size:28px; font-weight:700;
  box-shadow:0 14px 30px -12px rgba(13,148,136,0.5);
}
.hero h1{font-size:40px; margin-bottom:6px;}
.hero .role-line{font-size:17px; color:var(--ink-muted); font-weight:500; margin-bottom:4px;}
.hero .loc-line{font-size:14px; color:var(--ink-faint); display:flex; align-items:center; gap:6px;}
.hero .loc-line svg{width:15px; height:15px;}

.contact-strip{display:flex; flex-wrap:wrap; gap:10px; margin-top:6px;}
.contact-pill{
  display:inline-flex; align-items:center; gap:7px;
  padding:8px 14px; border-radius:999px;
  border:1px solid var(--border-strong); background:var(--surface);
  font-size:13.5px; color:var(--ink-muted); font-weight:500;
  transition:border-color .2s, color .2s;
}
.contact-pill svg{width:15px; height:15px;}
.contact-pill:hover{border-color:var(--teal); color:var(--teal);}

.hero-ctas{display:flex; gap:12px; flex-wrap:wrap; margin-top:6px;}

/* =========================================================
   Summary
   ========================================================= */
.summary-text{font-size:17.5px; color:var(--ink-muted); max-width:820px; line-height:1.75;}

/* =========================================================
   Competencies
   ========================================================= */
.comp-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
@media (max-width:800px){.comp-grid{grid-template-columns:1fr;}}
.comp-card{background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:26px;}
.comp-card h4{font-size:14.5px; text-transform:uppercase; letter-spacing:0.04em; color:var(--teal); margin-bottom:16px;}
.comp-tags{display:flex; flex-wrap:wrap; gap:8px;}
.comp-tags span{
  padding:6px 12px; border-radius:999px; background:var(--surface-2);
  font-size:13px; color:var(--ink-muted); font-weight:500;
}

/* =========================================================
   Experience timeline
   ========================================================= */
.timeline{position:relative; padding-left:32px;}
.timeline::before{content:""; position:absolute; left:6px; top:6px; bottom:6px; width:2px; background:var(--border-strong);}
.tl-item{position:relative; padding-bottom:44px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute; left:-32px; top:4px; width:14px; height:14px; border-radius:50%;
  background:var(--teal); border:3px solid var(--bg); box-shadow:0 0 0 2px var(--teal);
}
.tl-head{display:flex; flex-wrap:wrap; align-items:baseline; justify-content:space-between; gap:8px; margin-bottom:4px;}
.tl-role{font-size:19px; font-weight:600; font-family:var(--font-head);}
.tl-company{color:var(--teal); font-weight:600;}
.tl-dates{font-size:13.5px; color:var(--ink-faint); font-weight:500; white-space:nowrap;}
.tl-loc{font-size:13.5px; color:var(--ink-faint); margin-bottom:12px;}
.tl-summary{color:var(--ink-muted); font-size:15px; margin-bottom:12px;}
.tl-bullets{display:flex; flex-direction:column; gap:8px;}
.tl-bullets li{font-size:15px; color:var(--ink-muted); display:flex; gap:10px; align-items:flex-start;}
.tl-bullets li svg{width:15px; height:15px; color:var(--teal); flex-shrink:0; margin-top:4px;}

/* =========================================================
   Achievements
   ========================================================= */
.achieve-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:20px;}
@media (max-width:700px){.achieve-grid{grid-template-columns:1fr;}}
.achieve-card{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
  padding:26px; display:flex; gap:16px; align-items:flex-start;
}
.achieve-icon{
  width:42px; height:42px; border-radius:10px; flex-shrink:0;
  background:rgba(180,83,9,0.1); color:var(--amber);
  display:flex; align-items:center; justify-content:center;
}
.achieve-icon svg{width:21px; height:21px;}
.achieve-card h4{font-size:16px; margin-bottom:6px;}
.achieve-card p{font-size:14.5px; color:var(--ink-muted);}

/* =========================================================
   Certifications / Education / Languages
   ========================================================= */
.info-grid{display:grid; grid-template-columns:1fr 1fr; gap:24px;}
@media (max-width:800px){.info-grid{grid-template-columns:1fr;}}
.info-card{background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:26px;}
.info-card h4{font-size:13px; text-transform:uppercase; letter-spacing:0.05em; color:var(--ink-faint); margin-bottom:16px;}
.cert-row{display:flex; align-items:center; gap:12px; padding:10px 0;}
.cert-row .badge-icon{
  width:38px; height:38px; border-radius:8px; background:rgba(13,148,136,0.1); color:var(--teal);
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.cert-row .badge-icon svg{width:19px; height:19px;}
.cert-row b{display:block; font-size:15px;}
.cert-row span{font-size:12.5px; color:var(--amber); font-weight:600; text-transform:uppercase; letter-spacing:0.03em;}
.edu-degree{font-size:16px; font-weight:600; margin-bottom:6px;}
.edu-school{color:var(--ink-muted); font-size:14.5px; margin-bottom:4px;}
.edu-meta{font-size:13px; color:var(--ink-faint);}
.lang-chips{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px;}
.lang-chip{
  padding:8px 14px; border-radius:999px; background:var(--surface-2);
  font-size:13.5px; font-weight:500; color:var(--ink-muted);
}
.lang-chip b{color:var(--ink); font-weight:600;}

/* =========================================================
   CTA
   ========================================================= */
.cta-band{
  background:linear-gradient(135deg, #0d9488, #0b7c72);
  border-radius:var(--radius); padding:56px 48px; text-align:center; color:#fff;
}
.cta-band h2{color:#fff; font-size:28px; margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,0.85); max-width:480px; margin:0 auto 28px; font-size:15.5px;}
.cta-band .btn-secondary{background:rgba(255,255,255,0.12); color:#fff; border-color:rgba(255,255,255,0.35);}
.cta-band .btn-secondary:hover{background:rgba(255,255,255,0.2); border-color:#fff; color:#fff;}
.cta-band .btn-primary{background:#fff; color:var(--teal-dark);}
.cta-band .btn-primary:hover{background:#f1f3f7;}
.cta-actions{display:flex; gap:14px; justify-content:center; flex-wrap:wrap;}
@media (max-width:640px){.cta-band{padding:40px 24px;} .cta-band h2{font-size:22px;}}

/* =========================================================
   Footer
   ========================================================= */
.footer{border-top:1px solid var(--border); padding:36px 0; margin-top:20px;}
.footer-inner{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px;}
.footer-inner p{font-size:13.5px; color:var(--ink-faint);}
.footer-links{display:flex; gap:18px;}
.footer-links a{font-size:13.5px; color:var(--ink-muted); transition:color .2s;}
.footer-links a:hover{color:var(--teal);}

/* Reveal */
[data-reveal]{opacity:0; transform:translateY(20px); transition:opacity .6s var(--ease), transform .6s var(--ease);}
[data-reveal].in-view{opacity:1; transform:translateY(0);}

.skip-link{position:absolute; left:-999px; top:auto; background:var(--teal); color:#fff; padding:12px 20px; border-radius:8px; z-index:2000;}
.skip-link:focus{left:16px; top:16px;}
:focus-visible{outline:2px solid var(--teal); outline-offset:3px;}