/* ═══════════════════════════════════════════════════════
   MERC INTEGRA – SHARED STYLESHEET
   ═══════════════════════════════════════════════════════ */

/* ── RESET & BASE ─────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --black:  #080808;
  --dark:   #111111;
  --card:   #181818;
  --card2:  #1e1e1e;
  --border: #252525;
  --gold:   #c9a84c;
  --gold2:  #e8c060;
  --white:  #f0f0f0;
  --grey:   #777;
  --grey2:  #555;
  --fh: 'Oswald', sans-serif;
  --fb: 'Inter', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--fb);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 3px; }

/* ── BUTTONS ──────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 13px 34px;
  background: #000;
  color: #fff;
  font-family: var(--fh);
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  border: 1px solid rgba(255,255,255,.22);
  cursor: pointer;
  transition: background .25s, color .25s, border-color .25s;
}
.btn:hover { background: var(--white); color: var(--black); border-color: var(--white); }

.btn-gold { background: var(--gold); border-color: var(--gold); color: var(--black); }
.btn-gold:hover { background: transparent; color: var(--gold); border-color: var(--gold); }

.btn-outline { background: transparent; border-color: rgba(255,255,255,.3); }
.btn-outline:hover { background: var(--white); color: var(--black); border-color: var(--white); }

/* ── NAVBAR ───────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  height: 68px;
  background: rgba(8,8,8,.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  transition: height .3s;
}
#navbar.scrolled { height: 58px; border-bottom-color: rgba(201,168,76,.2); }

.nav-logo { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.nav-logo img { height: 52px; filter: invert(1); transition: height .3s; }
.nav-logo-text { font-family: var(--fh); font-size: 15px; letter-spacing: 4px; text-transform: uppercase; color: #f0f0f0; line-height: 1.1; }
.nav-logo-text strong { color: var(--gold); font-weight: 700; display: block; font-size: 18px; }
#navbar.scrolled .nav-logo img { height: 38px; }
#navbar.scrolled .nav-logo-text { font-size: 13px; }
#navbar.scrolled .nav-logo-text strong { font-size: 16px; }

.nav-links { display: flex; gap: 2px; align-items: center; }
.nav-links a {
  font-family: var(--fh);
  font-size: 12px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  padding: 8px 12px;
  border-radius: 2px;
  transition: background .2s, color .2s;
  color: rgba(240,240,240,.82);
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.active { background: var(--gold); color: var(--black); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); transition: all .3s; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── HERO (pełnoekranowy – tylko index) ───────────────── */
#hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#yt-bg {
  position: absolute;
  top: 50%; left: 50%;
  width: 100vw;
  height: 56.25vw;
  min-height: 100vh;
  min-width: 177.78vh;
  transform: translate(-50%, -50%);
  pointer-events: none;
}
#yt-bg iframe { width: 100%; height: 100%; border: none; }

#hero-fallback {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse at center, rgba(201,168,76,.06) 0%, transparent 70%),
    url('../img/10mercintegra1.jpg') center/cover no-repeat;
  transition: opacity 1s;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,.22) 0%, rgba(0,0,0,.44) 50%, rgba(0,0,0,.88) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  animation: fadeUp .9s ease both;
}
.hero-logo { width: 130px; filter: invert(1); margin: 0 auto 32px; animation: fadeDown .9s ease both; }
.hero-title { font-family: var(--fh); font-size: clamp(52px,9vw,110px); font-weight: 700; letter-spacing: 8px; text-transform: uppercase; line-height: .95; margin-bottom: 20px; }
.hero-title span { color: var(--gold); }
.hero-sub { font-size: clamp(11px,1.5vw,14px); letter-spacing: 5px; color: rgba(240,240,240,.6); text-transform: uppercase; font-weight: 300; margin-bottom: 44px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.scroll-hint {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 8px;
  animation: bounce 2.4s ease infinite; opacity: .55;
}
.scroll-hint span { font-size: 10px; letter-spacing: 3px; text-transform: uppercase; }
.scroll-hint-line { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--white), transparent); }

/* ── PAGE HERO (podstrony) ────────────────────────────── */
.page-hero {
  padding: 160px 48px 80px;
  background: var(--dark);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 40%;
  height: 100%;
  background: radial-gradient(ellipse at right center, rgba(201,168,76,.06) 0%, transparent 65%);
  pointer-events: none;
}
.page-hero-tag {
  font-family: var(--fh);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(201,168,76,.35);
  display: inline-block;
  padding: 5px 14px;
  margin-bottom: 20px;
}
.page-hero-title {
  font-family: var(--fh);
  font-size: clamp(40px,6vw,80px);
  font-weight: 700;
  letter-spacing: 5px;
  text-transform: uppercase;
  line-height: .95;
  margin-bottom: 18px;
}
.page-hero-title span { color: var(--gold); }
.page-hero-sub { font-size: 15px; color: rgba(240,240,240,.6); letter-spacing: 1px; max-width: 600px; }
.breadcrumb { display: flex; gap: 8px; align-items: center; margin-top: 28px; font-size: 12px; letter-spacing: 1.5px; color: var(--grey); text-transform: uppercase; }
.breadcrumb a { color: var(--grey); transition: color .2s; }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb span { color: var(--gold2); }

/* ── SECTION ──────────────────────────────────────────── */
.section { padding: 100px 48px; max-width: 1400px; margin: 0 auto; }
.section-full { padding: 100px 0; background: var(--dark); }
.section-inner { max-width: 1400px; margin: 0 auto; padding: 0 48px; }

.tag {
  display: inline-block;
  font-family: var(--fh);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid rgba(201,168,76,.35);
  padding: 5px 14px;
  margin-bottom: 20px;
}
.sec-title { font-family: var(--fh); font-size: clamp(32px,5vw,58px); font-weight: 700; letter-spacing: 4px; text-transform: uppercase; line-height: 1; margin-bottom: 14px; }
.sec-title span { color: var(--gold); }
.sec-line { width: 54px; height: 2px; background: var(--gold); margin-bottom: 50px; }
.sec-line.center { margin: 0 auto 50px; }

/* ── CARDS ────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  transition: border-color .3s, transform .3s;
}
.card:hover { border-color: rgba(201,168,76,.4); transform: translateY(-3px); }

/* ── STATS ────────────────────────────────────────────── */
.stats { display: flex; border-top: 1px solid var(--border); }
.stat { flex: 1; text-align: center; padding: 28px 12px; border-right: 1px solid var(--border); }
.stat:last-child { border-right: none; }
.stat-num { font-family: var(--fh); font-size: 52px; line-height: 1; color: var(--gold); margin-bottom: 6px; }
.stat-label { font-size: 10px; letter-spacing: 2.5px; color: var(--grey); text-transform: uppercase; }

/* ── VIDEO ────────────────────────────────────────────── */
.video-wrap { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; background: var(--card); border: 1px solid var(--border); }
.video-wrap iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none; }

/* ── GALLERY ──────────────────────────────────────────── */
.gallery-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 6px; }
.gallery-item { position: relative; overflow: hidden; aspect-ratio: 1/1; cursor: zoom-in; background: var(--card); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s, filter .45s; filter: grayscale(25%); }
.gallery-item:hover img { transform: scale(1.07); filter: grayscale(0); }
.gi-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0); transition: background .3s; display: flex; align-items: center; justify-content: center; }
.gallery-item:hover .gi-overlay { background: rgba(0,0,0,.3); }
.gi-overlay svg { opacity: 0; transition: opacity .3s; }
.gallery-item:hover .gi-overlay svg { opacity: 1; }
.gallery-item:nth-child(1) { grid-column: span 2; grid-row: span 2; }

/* ── LIGHTBOX ─────────────────────────────────────────── */
#lightbox { display: none; position: fixed; inset: 0; z-index: 9999; background: rgba(0,0,0,.95); align-items: center; justify-content: center; }
#lightbox.active { display: flex; }
#lightbox img { max-width: 90vw; max-height: 88vh; object-fit: contain; }
.lb-close { position: absolute; top: 18px; right: 26px; font-size: 38px; cursor: pointer; color: rgba(255,255,255,.7); transition: color .2s; }
.lb-close:hover { color: var(--white); }
.lb-prev, .lb-next { position: absolute; top: 50%; transform: translateY(-50%); font-size: 48px; cursor: pointer; padding: 20px; color: rgba(255,255,255,.6); user-select: none; transition: color .2s; }
.lb-prev:hover, .lb-next:hover { color: var(--white); }
.lb-prev { left: 8px; } .lb-next { right: 8px; }
.lb-counter { position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); font-size: 12px; letter-spacing: 2px; color: rgba(255,255,255,.45); }

/* ── LEAFLET MAP ──────────────────────────────────────── */
#map-wrap { border: 1px solid var(--border); overflow: hidden; }
#map { height: 460px; }
.leaflet-container { background: #111; }
.leaflet-popup-content-wrapper { background: #1a1a1a; color: var(--white); border-radius: 2px; border: 1px solid var(--border); box-shadow: 0 4px 24px rgba(0,0,0,.6); }
.leaflet-popup-tip { background: #1a1a1a; }
.leaflet-popup-close-button { color: var(--grey) !important; }
.pulse-wrap { position: relative; width: 22px; height: 22px; }
.pulse-core { width: 12px; height: 12px; background: var(--gold); border-radius: 50%; position: absolute; top: 5px; left: 5px; border: 2px solid #fff; box-shadow: 0 0 8px rgba(201,168,76,.8); }
.pulse-ring { position: absolute; top: 0; left: 0; width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--gold); animation: pulseRing 2s ease-out infinite; }
.pulse-ring2 { animation-delay: .8s; }
@keyframes pulseRing { 0% { transform: scale(.8); opacity: .9; } 100% { transform: scale(2.8); opacity: 0; } }

/* ── BLOG CARDS ───────────────────────────────────────── */
.blog-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.blog-card { background: var(--card); border: 1px solid var(--border); overflow: hidden; transition: border-color .3s, transform .3s; }
.blog-card:hover { border-color: rgba(201,168,76,.5); transform: translateY(-4px); }
.blog-card-img { aspect-ratio: 16/9; overflow: hidden; }
.blog-card-img img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(20%); transition: transform .5s, filter .5s; }
.blog-card:hover .blog-card-img img { transform: scale(1.05); filter: grayscale(0); }
.blog-card-body { padding: 28px; }
.blog-card-meta { display: flex; gap: 14px; align-items: center; margin-bottom: 14px; }
.blog-card-cat { font-family: var(--fh); font-size: 10px; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); border: 1px solid rgba(201,168,76,.35); padding: 3px 10px; }
.blog-card-date { font-size: 12px; color: var(--grey); letter-spacing: 1px; }
.blog-card-title { font-family: var(--fh); font-size: 20px; letter-spacing: 1.5px; text-transform: uppercase; line-height: 1.2; margin-bottom: 12px; transition: color .2s; }
.blog-card:hover .blog-card-title { color: var(--gold); }
.blog-card-excerpt { font-size: 14px; color: rgba(240,240,240,.65); line-height: 1.75; margin-bottom: 20px; }
.blog-card-link { font-family: var(--fh); font-size: 11px; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); display: inline-flex; align-items: center; gap: 8px; transition: gap .2s; }
.blog-card:hover .blog-card-link { gap: 14px; }

/* ── BLOG POST ────────────────────────────────────────── */
.post-wrap { max-width: 860px; margin: 0 auto; padding: 80px 48px; }
.post-header { margin-bottom: 52px; }
.post-meta { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; margin-bottom: 22px; }
.post-cat { font-family: var(--fh); font-size: 10px; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); border: 1px solid rgba(201,168,76,.35); padding: 4px 12px; }
.post-date { font-size: 12px; color: var(--grey); letter-spacing: 1px; }
.post-read { font-size: 12px; color: var(--grey); letter-spacing: 1px; }
.post-title { font-family: var(--fh); font-size: clamp(30px,5vw,54px); font-weight: 700; letter-spacing: 3px; text-transform: uppercase; line-height: 1.05; margin-bottom: 16px; }
.post-title span { color: var(--gold); }
.post-lead { font-size: 17px; color: rgba(240,240,240,.75); line-height: 1.75; border-left: 3px solid var(--gold); padding-left: 20px; }
.post-cover { width: 100%; aspect-ratio: 16/9; object-fit: cover; margin: 44px 0; border: 1px solid var(--border); }
.post-body { font-size: 16px; color: rgba(240,240,240,.8); line-height: 1.85; }
.post-body h2 { font-family: var(--fh); font-size: 28px; letter-spacing: 2px; text-transform: uppercase; color: var(--white); margin: 48px 0 16px; }
.post-body h2 span { color: var(--gold); }
.post-body p { margin-bottom: 20px; }
.post-body ul { margin: 0 0 20px 20px; }
.post-body li { margin-bottom: 8px; }
.post-body blockquote { border-left: 3px solid var(--gold); padding: 16px 20px; margin: 32px 0; background: var(--card); font-style: italic; color: rgba(240,240,240,.7); font-size: 15px; }
.post-divider { width: 54px; height: 2px; background: var(--gold); margin: 48px 0; }
.post-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }
.post-tag { font-family: var(--fh); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--grey); border: 1px solid var(--border); padding: 5px 12px; transition: all .2s; }
.post-tag:hover { border-color: var(--gold); color: var(--gold); }
.post-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 52px; padding-top: 32px; border-top: 1px solid var(--border); }
.post-nav a { flex: 1; padding: 20px; background: var(--card); border: 1px solid var(--border); transition: border-color .3s; font-family: var(--fh); font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--grey); }
.post-nav a span { display: block; font-size: 15px; color: var(--white); margin-top: 6px; }
.post-nav a:hover { border-color: var(--gold); }
.post-nav .post-nav-next { text-align: right; }

/* ── PARTNERS ─────────────────────────────────────────── */
.partners-grid { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: center; }
.partner-card { background: var(--card); border: 1px solid var(--border); padding: 28px 44px; transition: border-color .3s, transform .3s; display: flex; align-items: center; justify-content: center; min-width: 180px; }
.partner-card:hover { border-color: var(--gold); transform: translateY(-3px); }
.partner-card img { height: 56px; width: auto; object-fit: contain; filter: grayscale(100%) brightness(1.6); transition: filter .3s; }
.partner-card:hover img { filter: grayscale(0) brightness(1); }

/* ── CONTACT ──────────────────────────────────────────── */
.kontakt-row { display: flex; align-items: center; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.kontakt-icon { width: 44px; height: 44px; background: var(--card); border: 1px solid var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--gold); flex-shrink: 0; font-size: 18px; }
.kontakt-row-label { font-size: 10px; letter-spacing: 2px; color: var(--grey); text-transform: uppercase; margin-bottom: 4px; }
.kontakt-row a, .kontakt-row span { font-size: 14.5px; transition: color .2s; }
.kontakt-row a:hover { color: var(--gold); }
.social-row { display: flex; gap: 10px; margin-top: 28px; }
.social-btn { width: 46px; height: 46px; background: var(--card); border: 1px solid var(--border); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--white); font-size: 18px; transition: all .3s; }
.social-btn:hover { background: var(--gold); border-color: var(--gold); color: var(--black); }
.form-wrap { display: flex; flex-direction: column; gap: 14px; }
.form-wrap input, .form-wrap textarea, .form-wrap select { background: var(--card); border: 1px solid var(--border); color: var(--white); padding: 13px 17px; font-family: var(--fb); font-size: 14px; outline: none; transition: border-color .25s; width: 100%; border-radius: 1px; }
.form-wrap input:focus, .form-wrap textarea:focus, .form-wrap select:focus { border-color: var(--gold); }
.form-wrap input::placeholder, .form-wrap textarea::placeholder { color: var(--grey); }
.form-wrap textarea { min-height: 140px; resize: vertical; }
.form-wrap select option { background: var(--card); }

/* ── FOOTER ───────────────────────────────────────────── */
footer { background: #040404; border-top: 1px solid var(--border); padding: 56px 48px 36px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; max-width: 1400px; margin: 0 auto 44px; }
.foot-brand img { height: 52px; filter: invert(1); opacity: .55; margin-bottom: 16px; }
.foot-brand p { color: var(--grey); font-size: 13px; line-height: 1.7; max-width: 260px; }
.foot-col h4 { font-family: var(--fh); font-size: 13px; letter-spacing: 3px; text-transform: uppercase; color: var(--white); margin-bottom: 18px; }
.foot-col ul { list-style: none; }
.foot-col ul li { margin-bottom: 10px; }
.foot-col ul a { color: var(--grey); font-size: 13px; transition: color .2s; }
.foot-col ul a:hover { color: var(--gold); }
.foot-bottom { max-width: 1400px; margin: 0 auto; padding-top: 28px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.foot-bottom p { color: var(--grey2); font-size: 12.5px; }
.foot-bottom a { color: var(--gold); }

/* ── REVEAL ANIMATION ─────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: .12s; }
.reveal-d2 { transition-delay: .24s; }
.reveal-d3 { transition-delay: .36s; }

/* ── KEYFRAMES ────────────────────────────────────────── */
@keyframes fadeDown { from { opacity: 0; transform: translateY(-26px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeUp   { from { opacity: 0; transform: translateY(26px);  } to { opacity: 1; transform: translateY(0); } }
@keyframes bounce   { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(9px); } }

/* ── RESPONSIVE ───────────────────────────────────────── */
@media (max-width: 1100px) {
  .blog-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  #navbar { padding: 0 20px; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: rgba(8,8,8,.98); padding: 16px; border-bottom: 1px solid var(--border); gap: 2px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .hamburger { display: flex; }
  .section { padding: 70px 20px; }
  .section-inner { padding: 0 20px; }
  .section-full { padding: 70px 0; }
  .page-hero { padding: 130px 20px 60px; }
  .gallery-grid { grid-template-columns: repeat(2,1fr); }
  .gallery-item:nth-child(1) { grid-column: span 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .post-wrap { padding: 60px 20px; }
}

@media (max-width: 600px) {
  .blog-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2,1fr); }
  .gallery-item:nth-child(1) { grid-column: 1; grid-row: 1; }
  .hero-cta { flex-direction: column; align-items: center; }
  .stats { flex-wrap: wrap; }
  .stat { min-width: 50%; }
}