/* =========================================================
   MRD SIP Group — Design tokens
   Inspiracija: tehnički/blueprint crtež kuće iz loga.
   ========================================================= */

:root {
  /* Boje */
  --ink: #14181c;
  --ink-soft: #2b333a;
  --paper: #eef1f3;
  --paper-raised: #ffffff;
  --steel: #63707a;
  --steel-light: #9aa7af;
  --blue: #2281c0;
  --blue-deep: #194b70;
  --blue-light: #5fa8dc;
  --line: #d7dde1;

  /* Tipografija */
  --font-display: 'Space Grotesk', 'Archivo', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Razmak / raster */
  --gap: clamp(1.25rem, 3vw, 2.5rem);
  --container: 1180px;
  --radius: 2px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p { margin: 0 0 1em; color: var(--ink-soft); }

/* Blueprint eyebrow labela — tehnička oznaka poput dimenzija na nacrtu */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-deep);
  margin-bottom: 0.9em;
}
.eyebrow::before {
  content: '';
  width: 26px;
  height: 1px;
  background: var(--blue-light);
  display: inline-block;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* Fokus vidljivost */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

/* =========================================================
   Header / navigacija
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(238, 241, 243, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
  gap: 1.5rem;
}

.brand { display: flex; align-items: center; }
.brand img { height: 48px; width: auto; }

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2.1rem);
}

.main-nav a {
  font-family: var(--font-mono);
  font-size: 0.83rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0.4rem 0;
  position: relative;
  white-space: nowrap;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--blue-light);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.main-nav a:hover::after,
.main-nav a.active::after {
  transform: scaleX(1);
}

.main-nav a.active { color: var(--ink); }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper) !important;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--ink);
  transition: background 0.2s ease, color 0.2s ease;
}
.nav-cta:hover { background: var(--blue); border-color: var(--blue); }
.nav-cta::after { display: none; }

/* Prekidač jezika */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}
.lang-switch a {
  padding: 0.2rem 0.4rem;
  color: var(--steel-light);
}
.lang-switch a.active { color: var(--ink); border-bottom: 1px solid var(--blue-light); }
.lang-switch span { color: var(--line); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ink);
  width: 42px;
  height: 38px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  position: relative;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

/* =========================================================
   Hero — blueprint grid + house-frame graphic
   ========================================================= */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3.5rem, 9vw, 7.5rem) 0 clamp(3rem, 7vw, 6rem);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: center top;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 15%, rgba(44,123,184,0.10), transparent 60%),
              radial-gradient(ellipse at 10% 90%, rgba(95,168,220,0.09), transparent 55%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero-corner {
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--blue-deep);
  opacity: 0.55;
}
.hero-corner.tl { top: 0; left: 0; border-right: none; border-bottom: none; }
.hero-corner.br { bottom: 0; right: 0; border-left: none; border-top: none; }

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--blue-deep);
  margin-bottom: 1.1rem;
  letter-spacing: 0.02em;
}

.hero h1 { margin-bottom: 0.4em; }

.hero-text { font-size: 1.08rem; max-width: 46ch; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.9rem 1.5rem;
  border: 1px solid var(--ink);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--blue); border-color: var(--blue); transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--ink); }
.btn-secondary:hover { border-color: var(--blue); color: var(--blue-deep); transform: translateY(-2px); }
.btn-accent { background: var(--blue-light); border-color: var(--blue-light); color: var(--ink); }
.btn-accent:hover { background: var(--blue); border-color: var(--blue); color: var(--paper); }

/* Fotografija realizovanog objekta u hero delu — uramljena u "tehničkom" stilu loga */
.hero-photo {
  position: relative;
}

.hero-photo-frame {
  position: relative;
  border: 1px solid var(--line);
  background: var(--paper-raised);
  padding: 9px;
  box-shadow: 0 34px 60px -24px rgba(20, 24, 28, 0.38);
}

.hero-photo-frame img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.frame-corner {
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid var(--blue-light);
  pointer-events: none;
}
.frame-corner.tl { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.frame-corner.tr { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.frame-corner.bl { bottom: -1px; left: -1px; border-right: none; border-top: none; }
.frame-corner.br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.hero-photo-tag {
  position: absolute;
  top: 1.1rem;
  left: 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  background: rgba(20, 24, 28, 0.72);
  backdrop-filter: blur(3px);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 0.5rem 0.75rem;
}
.hero-photo-tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(95, 168, 220, 0.28);
}

.dim-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  fill: var(--blue-deep);
  letter-spacing: 0.04em;
}

/* =========================================================
   Sekcije — opšti raster
   ========================================================= */
.section {
  padding: clamp(3rem, 7vw, 6rem) 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 62ch;
  margin-bottom: clamp(2rem, 5vw, 3.2rem);
}

.section-alt { background: var(--paper-raised); }

/* Kartice usluga / prednosti */
.grid {
  display: grid;
  gap: 1.4rem;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 1.9rem 1.7rem;
  position: relative;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: var(--blue); transform: translateY(-3px); }

.card-tag {
  position: absolute;
  top: 0; right: 0;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: var(--steel-light);
  padding: 0.5rem 0.7rem;
}

.card h3 { margin-bottom: 0.5rem; color: var(--ink); }
.card p { margin-bottom: 0; font-size: 0.95rem; }

.section-alt .card { background: var(--paper); }

/* Dimension-line divider (tehnička linija sa strelicama, kao mera na nacrtu) */
.dim-divider {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 2.6rem 0;
  color: var(--steel-light);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.dim-divider::before,
.dim-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* Proces koraka — timeline */
.process-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.process-step {
  background: var(--paper-raised);
  padding: 1.8rem 1.6rem;
  position: relative;
}

.process-step .step-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--blue-deep);
  display: block;
  margin-bottom: 0.7rem;
}

.process-step h3 { font-size: 1.08rem; margin-bottom: 0.4rem; }
.process-step p { font-size: 0.92rem; margin-bottom: 0; }

/* CTA traka */
.cta-band {
  background: linear-gradient(rgba(20,24,28,0.88), rgba(20,24,28,0.88)), url('../images/projekat-vila.jpg') center 32%/cover no-repeat;
  color: var(--paper);
  padding: clamp(3rem, 7vw, 5rem) 0;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
                     linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 44px 44px;
}
.cta-inner { position: relative; text-align: center; max-width: 58ch; margin: 0 auto; }
.cta-band h2 { color: var(--paper); }
.cta-band p { color: #c7cdd2; }
.cta-band .btn-primary { background: var(--blue-light); border-color: var(--blue-light); color: var(--ink); }
.cta-band .btn-primary:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* Galerija projekata */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}
.gallery-item {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--paper-raised);
}
.gallery-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-tag {
  position: absolute;
  top: 0.7rem;
  left: 0.7rem;
  z-index: 1;
  background: rgba(20, 24, 28, 0.72);
  backdrop-filter: blur(3px);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0.6rem;
}
.gallery-caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: linear-gradient(0deg, rgba(20,24,28,0.82), transparent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 1.6rem 0.9rem 0.7rem;
}

/* Kontakt forma */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

.form-field { margin-bottom: 1.15rem; }
.form-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 0.4rem;
}
.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--paper-raised);
  padding: 0.8rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.98rem;
  color: var(--ink);
}
.form-field input:focus,
.form-field textarea:focus { border-color: var(--blue); }
.form-field textarea { resize: vertical; min-height: 130px; }

.contact-info {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 2rem;
}
.contact-info h3 { margin-bottom: 1.2rem; }
.contact-row { margin-bottom: 1.1rem; }
.contact-row .label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--steel-light);
  display: block;
  margin-bottom: 0.2rem;
}
.contact-row .value { font-family: var(--font-display); font-size: 1.05rem; }

.form-note {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  border-left: 3px solid var(--blue-light);
  background: var(--paper);
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--ink);
  color: #c7cdd2;
  padding: 3rem 0 1.6rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 1fr;
  gap: 2rem;
  padding-bottom: 2.2rem;
  border-bottom: 1px solid #2b333a;
}
.footer-brand img { height: 40px; margin-bottom: 0.9rem; filter: brightness(0) invert(1); }
.footer-brand p { color: #9aa7af; font-size: 0.92rem; max-width: 34ch; }
.footer-tagline {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-top: 0.6rem;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #9aa7af;
  margin-bottom: 0.9rem;
}
.footer-col a, .footer-col p {
  display: block;
  color: #c7cdd2;
  font-size: 0.92rem;
  margin-bottom: 0.55rem;
}
.footer-col a:hover { color: var(--blue); }
.footer-bottom {
  padding-top: 1.4rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #6b7680;
  letter-spacing: 0.03em;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-photo { max-width: 420px; margin: 0 auto; order: -1; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .main-nav {
    position: fixed;
    top: 73px; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.2rem clamp(1.25rem, 4vw, 2.5rem) 1.6rem;
    gap: 1.1rem;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-toggle { display: flex; }
  .nav-cta { align-self: flex-start; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
  h1 { font-size: 2.4rem; }
}

@media (max-width: 480px) {
  .hero-actions .btn { width: 100%; justify-content: center; }
}