/* ============================================================
   KOSTRENA AIR — Kakvoća zraka Kostrena
   Boje preuzete iz vizualnog identiteta studije / PGŽ.
   ============================================================ */
:root{
  --accent:#134e78;        /* tamno plava (studija) */
  --accent-2:#009ee0;      /* PGŽ plava */
  --green:#6ab446;         /* PGŽ zelena */
  --ink:#1d2733;
  --muted:#5a626b;
  --line:#e2e7ee;
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --bg-dark:#0e2236;
  --radius:14px;
  --shadow:0 8px 28px rgba(16,42,67,.10);
  --shadow-lg:0 18px 50px rgba(16,42,67,.18);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
.wrap{width:min(1160px,92vw);margin-inline:auto}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

h1,h2,h3{line-height:1.2;color:var(--ink);margin:.2em 0 .5em}
h1{font-size:clamp(1.9rem,4.2vw,3rem);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;letter-spacing:-.01em}
h3{font-size:1.2rem;font-weight:700}
p{margin:.6em 0}

/* ---------------- Header / nav ---------------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:64px}
.brand{display:flex;flex-direction:column;line-height:1.05;text-decoration:none}
.brand-mark{font-weight:800;font-size:1.25rem;color:var(--accent);letter-spacing:.02em}
.brand-sub{font-size:.74rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.nav{display:flex;gap:.4rem;flex-wrap:wrap}
.nav a{
  padding:.45rem .8rem;border-radius:999px;color:var(--ink);font-weight:600;font-size:.92rem;
  text-decoration:none;transition:background .15s,color .15s;
}
.nav a:hover{background:var(--bg-alt);text-decoration:none}
.nav a.aktivno{background:var(--accent);color:#fff}

/* ---------------- Hero ---------------- */
.hero{position:relative;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.03)}
.hero-overlay{position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(9,30,49,.92) 0%,rgba(13,62,98,.78) 45%,rgba(0,158,224,.35) 100%)}
.hero-content{position:relative;padding:clamp(3.5rem,9vw,7rem) 0;max-width:760px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.8rem;font-weight:700;color:#bfe6fb;margin:0 0 .6rem}
.hero h1{color:#fff}
.lead{font-size:1.15rem;color:#eaf2f8}
.hero .lead{color:#e8f1f8}
.hero-cta{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.6rem}

/* ---------------- Buttons ---------------- */
.btn{display:inline-block;padding:.8rem 1.4rem;border-radius:999px;font-weight:700;font-size:.98rem;
  text-decoration:none;transition:transform .12s,box-shadow .15s,background .15s;cursor:pointer;border:2px solid transparent}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 6px 18px rgba(106,180,70,.4)}
.btn-primary:hover{background:#5ea33c}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.22)}
.btn-lg{padding:1rem 1.8rem;font-size:1.08rem}
.btn-outline{background:#fff;color:var(--accent);border-color:var(--accent)}
.btn-outline:hover{background:var(--accent);color:#fff}
.sim-actions{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:.4rem}
.help-note{margin-top:1.4rem;font-size:.96rem;color:var(--muted)}
.help-note a{font-weight:700}

/* ---------------- Sections ---------------- */
.section{padding:clamp(3rem,6vw,5rem) 0}
.section-alt{background:var(--bg-alt);border-block:1px solid var(--line)}
.kicker{display:inline-block;text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:800;
  color:var(--accent-2);margin-bottom:.4rem}
.kicker.center,.center{text-align:center}
.kicker.center{display:block}
.sub{color:var(--muted);margin-top:-.2rem}
h2.center{margin-bottom:1.4rem}

.grid-2{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(1.5rem,4vw,3rem);align-items:center}
.prose p{color:#33414f}
.ticks{list-style:none;padding:0;margin:1.2rem 0 0}
.ticks li{position:relative;padding-left:1.8rem;margin:.5rem 0;color:#33414f}
.ticks li::before{content:"▸";position:absolute;left:0;color:var(--green);font-weight:900}

.photo-card{margin:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.photo-card img{width:100%;height:100%;object-fit:cover}
.photo-card figcaption{background:var(--accent);color:#fff;font-size:.85rem;padding:.6rem .9rem}

/* ---------------- Feature cards ---------------- */
.cards-2{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem;margin-top:1.6rem}
.feature-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;color:var(--ink)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none}
.feature-media{height:190px;background-size:cover;background-position:center}
.feature-body{padding:1.3rem 1.4rem 1.5rem}
.feature-body p{color:var(--muted);font-size:.96rem}
.feature-link{display:inline-block;margin-top:.6rem;font-weight:800;color:var(--accent-2)}

/* ---------------- Gallery ---------------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem;margin-top:1.5rem}
.gallery figure{margin:0;border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
.gallery img{width:100%;height:210px;object-fit:cover;transition:transform .3s}
.gallery a:hover img{transform:scale(1.05)}
.gallery figcaption{padding:.6rem .8rem;font-size:.85rem;color:var(--muted)}

/* ---------------- CTA band ---------------- */
.cta-band{background:linear-gradient(105deg,var(--accent) 0%,var(--accent-2) 100%);color:#fff}
.cta-band h2{color:#fff}
.cta-band .lead{color:#eaf6fd}
.cta-band .btn{margin-top:1.2rem}

/* ---------------- Simulation page ---------------- */
.sim-intro{padding:2.2rem 0 1.4rem;border-bottom:1px solid var(--line)}
.sim-intro .sub{max-width:780px}
.sim-frame-wrap{width:min(1400px,96vw);margin:1.2rem auto 2.4rem}
.sim-frame{width:100%;height:82vh;min-height:560px;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-lg);background:#fff}

/* ---------------- Footer ---------------- */
.site-footer{background:var(--bg-dark);color:#c9d6e2;margin-top:0}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:2rem;padding:2.6rem 0 1.6rem}
.footer-title{color:#fff;font-weight:700;margin-bottom:.5rem}
.footer-col p,.footer-col li{color:#a9bccd;font-size:.92rem}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin:.3rem 0}
.footer-col a{color:#bfe6fb}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:1rem 0;font-size:.85rem;color:#8aa0b4;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.footer-logout{color:#bfe6fb;font-weight:600}
.footer-sciom{display:inline-flex;align-items:center}
.footer-sciom img{height:26px;width:auto;opacity:.7;transition:opacity .15s}
.footer-sciom img:hover{opacity:1}
@media(max-width:560px){.footer-bottom{justify-content:center;text-align:center}}

/* ---------------- Login / pristup ---------------- */
.login-body{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.login-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.05)}
.login-overlay{position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(8,24,42,.95) 0%,rgba(11,46,74,.9) 55%,rgba(0,158,224,.6) 100%)}
.login-wrap{position:relative;z-index:1;width:min(440px,92vw);padding:2rem 0}
.login-card{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);padding:2.4rem 2.2rem 1.8rem;text-align:center}
.login-brand{display:flex;flex-direction:column;align-items:center;line-height:1.1;margin-bottom:1.4rem}
.login-brand .brand-mark{font-weight:800;font-size:1.4rem;color:var(--accent);letter-spacing:.02em}
.login-brand .brand-sub{font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-top:.15rem}
.login-lock{font-size:2.2rem;line-height:1;margin:.2rem 0 .6rem}
.login-card h1{font-size:1.5rem;margin:.1rem 0 .3rem}
.login-sub{color:var(--muted);font-size:.95rem;margin:0 0 1.3rem}
.login-error{background:#fdecea;border:1px solid #f5c6cb;color:#a12622;border-radius:10px;
  padding:.7rem .9rem;font-size:.9rem;margin-bottom:1rem}
.login-form{text-align:left}
.login-label{display:block;font-size:.8rem;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:.06em;margin-bottom:.4rem}
.login-input{width:100%;padding:.85rem 1rem;font-size:1.05rem;border:2px solid var(--line);border-radius:10px;
  outline:none;transition:border-color .15s,box-shadow .15s;letter-spacing:.08em}
.login-input:focus{border-color:var(--accent-2);box-shadow:0 0 0 3px rgba(0,158,224,.18)}
.login-btn{width:100%;margin-top:1.1rem;border:none}
.login-foot{color:var(--muted);font-size:.8rem;margin:1.4rem 0 0}

/* ---------------- Responsive ---------------- */
@media(max-width:880px){
  .grid-2{grid-template-columns:1fr}
  .cards-2{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr;gap:1.4rem}
}
@media(max-width:560px){
  .gallery{grid-template-columns:1fr}
  .nav a{padding:.4rem .6rem;font-size:.85rem}
}