/* ============================================================
   Mihailo Bogavac — CV site
   ============================================================ */

:root{
  --navy-950: #0b1b2b;
  --navy-900: #10263b;
  --navy-800: #17334e;
  --navy-700: #204162;
  --accent-500: #b9862f;
  --accent-600: #9c6f24;
  --accent-100: #f6ead2;
  --ink-900: #16212c;
  --ink-700: #3c4a58;
  --ink-500: #64707c;
  --paper-0: #ffffff;
  --paper-50: #f7f8fa;
  --paper-100: #eef1f4;
  --line: #e1e6ea;
  --radius: 12px;
  --shadow-sm: 0 1px 2px rgba(16,38,59,.06), 0 1px 1px rgba(16,38,59,.04);
  --shadow-md: 0 8px 24px rgba(16,38,59,.08);
  --maxw: 1120px;
  color-scheme: light;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ink-900);
  background: var(--paper-0);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}
h1,h2,h3{
  font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
  color: var(--navy-950);
  line-height: 1.2;
  margin: 0 0 .5em;
}
h2{ font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.1rem); font-weight: 700; }
h3{ font-size: 1.15rem; font-weight: 700; }
p{ margin: 0 0 1em; color: var(--ink-700); }
a{ color: var(--navy-800); }
img{ display:block; max-width:100%; }
ul{ margin:0; padding:0; }
button{ font-family: inherit; }

.wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link{
  position:absolute; left:-999px; top:auto;
  background: var(--navy-950); color:#fff; padding:10px 16px; border-radius:8px; z-index:200;
}
.skip-link:focus{ left:16px; top:16px; }

/* [data-lang] visibility handled inline via [hidden]; JS toggles the attribute. */

/* ---------- Header ---------- */
.site-header{
  position: sticky; top:0; z-index:100;
  background: rgba(255,255,255,.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:72px;
}
.brand{ display:flex; align-items:center; gap:10px; text-decoration:none; }
.brand-mark{
  width:38px; height:38px; border-radius:9px;
  background: linear-gradient(155deg, var(--navy-800), var(--navy-950));
  color:#fff; font-weight:800; font-size:.85rem; letter-spacing:.03em;
  display:flex; align-items:center; justify-content:center;
}
.brand-name{ font-weight:700; color: var(--navy-950); font-size:1.05rem; }

.main-nav{ display:flex; gap:28px; }
.main-nav a{
  text-decoration:none; color: var(--ink-700); font-weight:500; font-size:.95rem;
  padding:6px 2px; border-bottom:2px solid transparent;
  transition: color .15s, border-color .15s;
}
.main-nav a:hover{ color: var(--navy-950); border-color: var(--accent-500); }

.header-actions{ display:flex; align-items:center; gap:14px; }

.lang-toggle{
  display:flex; align-items:center; gap:6px;
  border:1px solid var(--line); background: var(--paper-50);
  border-radius:999px; padding:6px 6px; cursor:pointer;
  font-weight:700; font-size:.8rem; letter-spacing:.03em;
}
.lang-toggle .lang-opt{
  padding:4px 10px; border-radius:999px; color: var(--ink-500);
}
.lang-toggle .lang-sep{ color: var(--line); }
html[data-lang="sr"] .lang-toggle .lang-opt[data-val="sr"],
html[data-lang="en"] .lang-toggle .lang-opt[data-val="en"]{
  background: var(--navy-950); color:#fff;
}

.nav-burger{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:38px; height:38px; border:1px solid var(--line); border-radius:8px;
  background: var(--paper-50); cursor:pointer;
}
.nav-burger span{ display:block; width:16px; height:2px; background: var(--ink-900); margin:0 auto; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:12px 20px; border-radius:999px; font-weight:600; font-size:.95rem;
  text-decoration:none; border:1px solid transparent; cursor:pointer;
  transition: transform .15s, box-shadow .15s, background .15s;
}
.btn:hover{ transform: translateY(-1px); }
.btn-primary{
  background: linear-gradient(155deg, var(--navy-800), var(--navy-950));
  color:#fff; box-shadow: var(--shadow-sm);
}
.btn-primary:hover{ box-shadow: var(--shadow-md); }
.btn-ghost{
  background: var(--paper-0); color: var(--navy-950); border-color: var(--line);
}
.btn-ghost:hover{ border-color: var(--accent-500); color: var(--accent-600); }

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(185,134,47,.10), transparent 60%),
    linear-gradient(180deg, var(--paper-50), #fff 65%);
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--line);
}
.hero-inner{
  display:grid; grid-template-columns: 200px 1fr; gap:44px; align-items:start;
}
.hero-photo img{
  width:180px; height:180px; border-radius:20px; object-fit:cover;
  box-shadow: var(--shadow-md); border:4px solid #fff;
}
.eyebrow{
  text-transform: uppercase; letter-spacing:.14em; font-size:.75rem;
  font-weight:700; color: var(--accent-600); margin-bottom:10px;
}
.hero-text h1{ font-size: clamp(2.1rem, 1.7rem + 1.8vw, 3rem); margin-bottom:.15em; }
.role{ font-size:1.1rem; font-weight:600; color: var(--navy-800); margin-bottom:18px; }
.lead{ max-width: 64ch; }
.hero .years{ color: var(--accent-600); font-weight:800; }
.hero-cta{ display:flex; flex-wrap:wrap; gap:12px; margin-top:20px; }

/* ---------- Sections ---------- */
.section{ padding: 64px 0; }
.section-alt{ background: var(--paper-50); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section h2{ margin-bottom: 36px; position:relative; padding-bottom:14px; }
.section h2::after{
  content:""; position:absolute; left:0; bottom:0; width:56px; height:3px;
  background: var(--accent-500); border-radius:2px;
}

/* Competencies */
.competency-grid{
  display:grid; grid-template-columns: repeat(4, 1fr); gap:18px;
}
.competency-card{
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding:22px 18px; display:flex; flex-direction:column; gap:12px;
  box-shadow: var(--shadow-sm); transition: box-shadow .15s, transform .15s;
}
.competency-card:hover{ box-shadow: var(--shadow-md); transform: translateY(-2px); }
.competency-card svg{ color: var(--accent-600); }
.competency-card span{ font-weight:600; font-size:.95rem; color: var(--navy-950); }

/* Timeline */
.timeline{ position:relative; padding-left:28px; }
.timeline::before{
  content:""; position:absolute; left:5px; top:6px; bottom:6px; width:2px;
  background: var(--line);
}
.tl-item{ position:relative; padding-bottom:40px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-dot{
  position:absolute; left:-28px; top:6px; width:12px; height:12px; border-radius:50%;
  background: var(--paper-0); border:2px solid var(--navy-700);
}
.tl-dot-current{ background: var(--accent-500); border-color: var(--accent-500); box-shadow: 0 0 0 4px var(--accent-100); }
.tl-content{
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding:22px 24px; box-shadow: var(--shadow-sm);
}
.tl-head{ display:flex; flex-wrap:wrap; align-items:baseline; gap:8px 14px; margin-bottom:4px; }
.tl-head h3{ margin:0; }
.tl-period{
  font-size:.8rem; font-weight:700; color: var(--accent-600);
  background: var(--accent-100); padding:3px 10px; border-radius:999px;
}
.tl-company{ font-weight:600; color: var(--ink-700); margin-bottom:12px; }
.tl-note{ font-style: italic; }
.tl-content ul{ display:flex; flex-direction:column; gap:8px; }
.tl-content li{
  list-style:none; position:relative; padding-left:20px; color: var(--ink-700); font-size:.96rem;
}
.tl-content li::before{
  content:""; position:absolute; left:0; top:.6em; width:6px; height:6px; border-radius:50%;
  background: var(--accent-500);
}

/* Education / Languages */
.two-col{ display:grid; grid-template-columns: 1fr 1fr; gap:48px; align-items:start; }
.edu-card, .lang-card{
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding:24px; box-shadow: var(--shadow-sm);
}
.lang-card-head{ margin-bottom:14px; font-size:1.05rem; }
.lang-level{
  display:grid; grid-template-columns: 1fr auto auto; align-items:center; gap:10px;
  padding:7px 0; font-size:.92rem; color: var(--ink-700);
}
.lang-level .bar{
  width:120px; height:8px; border-radius:999px; background: var(--paper-100); position:relative; overflow:hidden;
}
.lang-level .bar::after{
  content:""; position:absolute; left:0; top:0; bottom:0;
  width: calc(var(--pct, 40%));
  background: linear-gradient(90deg, var(--accent-600), var(--accent-500));
  border-radius:999px;
}
.lang-level em{ font-style:normal; font-weight:700; color: var(--navy-800); width:2.2ch; text-align:right; }
.lang-scale{ font-size:.82rem; color: var(--ink-500); margin: 14px 0 0; }

/* Certificates */
.cert-grid{ display:grid; grid-template-columns: repeat(2, 1fr); gap:16px; }
.cert-card{
  background:#fff; border:1px solid var(--line); border-left:4px solid var(--accent-500);
  border-radius: var(--radius); padding:18px 20px; box-shadow: var(--shadow-sm);
}
.cert-card h3{ font-size:1rem; margin-bottom:6px; }
.cert-card p{ margin:0; font-size:.88rem; color: var(--ink-500); }

/* Contact */
.section-contact{ background: var(--navy-950); color:#fff; }
.section-contact h2{ color:#fff; }
.section-contact h2::after{ background: var(--accent-500); }
.contact-inner{ display:grid; grid-template-columns: 1.3fr .7fr; gap:48px; align-items:center; }
.contact-lead{ color: rgba(255,255,255,.75); max-width:52ch; }
.contact-list{ margin: 22px 0 28px; display:flex; flex-direction:column; gap:14px; }
.contact-list li{ list-style:none; display:flex; align-items:center; gap:12px; color: rgba(255,255,255,.9); }
.contact-list svg{ color: var(--accent-500); flex-shrink:0; }
.contact-list a{ color:#fff; text-decoration:none; }
.contact-list a:hover{ text-decoration:underline; }
.section-contact .btn-primary{ background:#fff; color: var(--navy-950); }
.section-contact .btn-primary:hover{ box-shadow:0 8px 24px rgba(0,0,0,.25); }

.qr-block{
  justify-self:center; text-align:center; background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.15); border-radius: var(--radius); padding:22px;
}
.qr-frame{
  background:#fff; padding:10px; border-radius:10px; border:0; cursor:pointer; line-height:0;
}
.qr-block img{ width:150px; height:150px; }
.qr-block p{ color: rgba(255,255,255,.7); font-size:.85rem; margin:12px 0 0; }

/* Footer */
.site-footer{ background: var(--navy-900); color: rgba(255,255,255,.6); font-size:.85rem; }
.footer-inner{ display:flex; align-items:center; justify-content:space-between; padding:20px 24px; }
.footer-inner p{ margin:0; color: rgba(255,255,255,.6); }
.lang-toggle-footer{ background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.18); }
.lang-toggle-footer .lang-opt{ color: rgba(255,255,255,.6); }
html[data-lang="sr"] .lang-toggle-footer .lang-opt[data-val="sr"],
html[data-lang="en"] .lang-toggle-footer .lang-opt[data-val="en"]{
  background: var(--accent-500); color: var(--navy-950);
}

/* ---------- Lightbox ---------- */
.lightbox{ position:fixed; inset:0; z-index:1000; display:flex; align-items:center; justify-content:center; }
.lightbox[hidden]{ display:none; }
.lightbox-backdrop{ position:absolute; inset:0; background: rgba(11,27,43,.72); backdrop-filter: blur(2px); }
.lightbox-panel{
  position:relative; background:#fff; border-radius:16px; padding:32px;
  text-align:center; box-shadow: var(--shadow-md); max-width: 90vw;
}
.lightbox-panel img{ width:260px; height:260px; margin:0 auto; }
.lightbox-panel p{ margin:14px 0 0; font-weight:600; color: var(--navy-950); }
.lightbox-close{
  position:absolute; top:8px; right:10px; width:32px; height:32px; border-radius:50%;
  border:0; background: var(--paper-100); font-size:1.3rem; line-height:1; cursor:pointer; color: var(--ink-700);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px){
  .competency-grid{ grid-template-columns: repeat(2, 1fr); }
  .two-col{ grid-template-columns: 1fr; gap:32px; }
  .cert-grid{ grid-template-columns: 1fr; }
  .contact-inner{ grid-template-columns: 1fr; }
  .qr-block{ justify-self:start; }
}

@media (max-width: 840px){
  .main-nav{
    position:fixed; top:72px; left:0; right:0; bottom:0;
    background:#fff; flex-direction:column; gap:0; padding:8px 24px;
    transform: translateX(100%); transition: transform .25s ease;
    border-top:1px solid var(--line);
  }
  .main-nav.open{ transform: translateX(0); }
  .main-nav a{ padding:14px 0; border-bottom:1px solid var(--line); }
  .nav-burger{ display:flex; }
  .hero-inner{ grid-template-columns: 1fr; text-align:center; }
  .hero-photo{ justify-self:center; }
  .hero-photo img{ margin:0 auto; }
  .lead{ max-width:none; margin-left:auto; margin-right:auto; }
  .hero-cta{ justify-content:center; }
}

@media (max-width: 600px){
  .wrap{ padding:0 18px; }
  .header-inner{ height:64px; }
  .brand-name{ display:none; }
  .hero{ padding:44px 0 40px; }
  .section{ padding:48px 0; }
  .competency-grid{ grid-template-columns: 1fr; }
  .lang-level{ grid-template-columns: 1fr auto; }
  .lang-level .bar{ grid-column: 1 / -1; width:100%; }
  .tl-content{ padding:18px; }
  .footer-inner{ flex-direction:column; gap:12px; text-align:center; }
}