/* --- ZMIENNE I RESET --- */
:root {
    --color-primary: #0A3D2E;      
    --color-primary-dark: #052b20;
    --color-accent: #D4AF37;       
    --color-accent-hover: #bfa13f;
    --color-text-dark: #222222;
    --color-text-light: #cccccc;   /* Jasny szary do ciemnych teł */
    --color-white: #ffffff;
    --color-bg-light: #f8f9fa;
    --color-footer-bg: #0e1111;    /* Bardzo ciemne tło (praktycznie czarne) */
    --font-main: 'Montserrat', sans-serif;
    --border-radius-main: 4px;     /* Ostre, nowoczesne krawędzie */
    --transition-fast: 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; background-color: var(--color-footer-bg); }
body { font-family: var(--font-main); color: var(--color-text-light); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

/* --- UŻYTECZNOŚCI --- */
.container { width: 90%; max-width: 1200px; margin: 0 auto; }
.section-padding { padding: 100px 0; }
.bg-light { background-color: var(--color-bg-light); color: var(--color-text-dark); }
.bg-dark { background-color: var(--color-footer-bg); } /* Ciemne tło sekcji ofertowej */
.text-white { color: var(--color-white); }
.text-center { text-align: center; }
.accent-text { color: var(--color-accent); font-weight: 700; letter-spacing: 2px; }

/* Przyciski */
.btn {
    display: inline-block; padding: 14px 32px; font-weight: 700; text-transform: uppercase;
    font-size: 0.9rem; letter-spacing: 1px; border-radius: 4px; cursor: pointer;
    transition: all var(--transition-fast); border: 2px solid transparent;
}
/* Nowy elegancki przycisk linkujący */
.btn-text {
    color: var(--color-accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: all var(--transition-fast);
}
.btn-text:hover {
    gap: 18px; /* Strzałka odsuwa się w prawo po najechaniu */
    color: var(--color-white);
}
.btn-primary { background-color: var(--color-accent); color: var(--color-primary-dark); }
.btn-primary:hover { background-color: var(--color-accent-hover); transform: translateY(-3px); }

/* --- LOADER --- */
.page-transition-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background-color: var(--color-footer-bg); z-index: 99999; display: flex; align-items: center; justify-content: center; transition: opacity 0.5s ease, visibility 0.5s ease; }
.page-transition-overlay.loaded { opacity: 0; visibility: hidden; }
.loader-logo { width: 70px; animation: pulseLogo 1.5s infinite ease-in-out; }
@keyframes pulseLogo { 0% { transform: scale(1); opacity: 0.7; } 50% { transform: scale(1.1); opacity: 1; } 100% { transform: scale(1); opacity: 0.7; } }

/* --- HEADER DESKTOP --- */
#main-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 20px 0; background-color: transparent; transition: all 0.4s ease; border-bottom: 1px solid rgba(255,255,255,0.1); }
#main-header.scrolled { background-color: var(--color-primary-dark); padding: 15px 0; box-shadow: 0 4px 20px rgba(0,0,0,0.1); border-bottom: none; }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo a { display: flex; align-items: center; }
.logo-img { width: 55px; height: 55px; object-fit: contain; transition: transform var(--transition-fast); }
.logo-img:hover { transform: scale(1.05); }
.desktop-nav ul { display: flex; gap: 30px; }
.desktop-nav a { color: rgba(255,255,255,0.8); font-weight: 600; font-size: 0.95rem; text-transform: uppercase; padding: 10px 0; position: relative; }
.desktop-nav a:hover, .desktop-nav a.active { color: var(--color-accent); }
.desktop-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background-color: var(--color-accent); transition: var(--transition-fast); }
.desktop-nav a:hover::after, .desktop-nav a.active::after { width: 100%; }
.mobile-menu-toggle { display: none; color: var(--color-white); font-size: 1.8rem; cursor: pointer; }

/* --- MINI HERO DLA OFERTY --- */
#oferta-hero {
    height: 40vh;
    min-height: 500px;
    background-image: url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-bg-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(14, 17, 17, 0.85); 
}
#oferta-hero .container { position: relative; z-index: 2; }
#oferta-hero h1 { font-size: 3rem; margin-top: 10px; margin-bottom: 20px; }
.hero-desc { color: var(--color-text-light); max-width: 600px; margin: 0 auto; font-size: 1.1rem; }

/* --- LISTA USŁUG (Z-PATTERN Z REFERENCJI) --- */
.service-row {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-bottom: 120px;
}
.service-row:last-child { margin-bottom: 0; }
.service-row.reverse { flex-direction: row-reverse; } /* Odwraca układ - obrazek po prawej */

/* Blok ze zdjęciem i "wystającą" ramką */
.service-image {
    flex: 1;
    position: relative;
}
.service-image img {
    width: 100%;
    border-radius: var(--border-radius-main);
    position: relative;
    z-index: 2;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
/* Dekoracyjny prostokąt pod zdjęciem */
.img-backdrop {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #1a1e1f;
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: var(--border-radius-main);
    z-index: 1;
}
.img-backdrop.left { top: -25px; left: -25px; } /* Dla zwykłego rzędu */
.img-backdrop.right { top: -25px; right: -25px; } /* Dla rzędu odwróconego */

/* Blok z tekstem */
.service-content {
    flex: 1;
}

/* Kwadrat z ikoną (Jak na zdjęciu Kosztorysy budowlane) */
.icon-box-offer {
    width: 55px;
    height: 55px;
    background-color: #1a1e1f;
    border: 1px solid rgba(212, 175, 55, 0.3); /* Złota, delikatna ramka */
    border-radius: var(--border-radius-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-bottom: 25px;
}

.service-content h2 {
    font-size: 2.2rem;
    color: var(--color-white);
    margin-bottom: 15px;
}

/* Złota linia pod tytułem */
.gold-line {
    width: 40px;
    height: 2px;
    background-color: var(--color-accent);
    margin-bottom: 25px;
}

.service-content p {
    color: #aaaaaa;
    margin-bottom: 20px;
    font-size: 1rem;
    line-height: 1.8;
}

/* --- STOPKA (Symetryczna) --- */
footer { background-color: var(--color-footer-bg); color: #aaaaaa; padding: 80px 0 0; border-top: 1px solid rgba(255,255,255,0.05); }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; margin-bottom: 60px; }
.footer-col { text-align: center; }
.footer-logo { margin-bottom: 25px; display: inline-flex; justify-content: center; width: 100%; }
.footer-logo a { display: flex; align-items: center; justify-content: center; }
.footer-logo-img { width: 65px; height: 65px; object-fit: contain; transition: transform var(--transition-fast); }
.footer-logo-img:hover { transform: scale(1.05); }
.about-col p { font-size: 0.9rem; line-height: 1.8; margin-bottom: 25px; }
.footer-socials { display: flex; flex-direction: column; align-items: center; gap: 15px; }
.footer-socials a { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--color-accent); }
.footer-socials a:hover { color: var(--color-white); }
.footer-col h4 { color: var(--color-white); font-size: 1.1rem; letter-spacing: 1px; margin-bottom: 30px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { font-size: 0.9rem; color: #aaaaaa; transition: 0.3s; }
.footer-col ul li a:hover { color: var(--color-accent); }
.contact-col ul { display: inline-block; text-align: left; }
.contact-col ul li { display: flex; align-items: flex-start; gap: 15px; color: #cccccc; margin-bottom: 15px; }
.icon-accent { color: var(--color-accent); margin-top: 5px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.05); padding: 25px 0; font-size: 0.8rem; }

/* --- ANIMACJE --- */
.fade-in, .fade-in-up { opacity: 0; transition: all 0.8s ease; }
.fade-in-up { transform: translateY(40px); }
.fade-in.visible, .fade-in-up.visible { opacity: 1; transform: translate(0); }

/* --- RESPONSYWNOŚĆ --- */
@media (max-width: 1024px) {
    .service-row, .service-row.reverse { gap: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    /* --- 1. NAGŁÓWEK --- */
    #main-header { padding: 15px 0 !important; background-color: transparent !important; border-bottom: 1px solid rgba(255,255,255,0.1) !important; transition: background-color 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease !important; }
    #main-header.scrolled { background-color: var(--color-primary-dark) !important; border-bottom-color: transparent !important; box-shadow: 0 4px 15px rgba(0,0,0,0.3) !important; }
    #main-header.menu-open { background-color: var(--color-primary-dark) !important; }
    
    /* KLUCZOWA POPRAWKA: Uwalniamy menu z kontenera 90% */
    .header-container { position: static !important; }
    
    /* Nadajemy wyższy z-index elementom klikalnym, aby zawsze były nad menu */
    .logo, .mobile-menu-toggle { position: relative; z-index: 1002; }

    /* --- 2. MENU MOBILNE NA PEŁNĄ SZEROKOŚĆ --- */
    .desktop-nav { 
        position: absolute; 
        top: 100%;
        left: 0;
        width: 100%; /* Teraz bez problemu zajmie 100% szerokości ekranu! */
        height: auto; 
        background-color: rgba(5, 43, 32, 0.95) !important; 
        backdrop-filter: blur(15px) !important;
        -webkit-backdrop-filter: blur(15px) !important;
        padding: 0; 
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }

    .desktop-nav.active { opacity: 1; visibility: visible; transform: translateY(0); }
    .desktop-nav ul { display: flex; flex-direction: column; width: 100%; margin: 0; padding: 0; gap: 0 !important; }
    .desktop-nav ul li { width: 100%; margin: 0; padding: 0; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
    .desktop-nav ul li:first-child { border-top: 1px solid rgba(255, 255, 255, 0.1); }
    .desktop-nav ul li a { display: flex; align-items: center; justify-content: center; height: 75px; width: 100%; padding: 0; font-size: 1.05rem; letter-spacing: 2px; color: var(--color-white); line-height: 1; margin: 0; }
    .desktop-nav ul li a::after { display: none; }
    .mobile-menu-toggle { display: block; }
    
    /* ... RESZTA TWOJEGO KODU MOBILNEGO POZOSTAJE BEZ ZMIAN ... */
    
    /* Sekcje Ofertowe */
    #oferta-hero h1 { font-size: 2.2rem; }
    .service-row, .service-row.reverse { flex-direction: column; gap: 40px; margin-bottom: 80px; }
    .img-backdrop.left, .img-backdrop.right { top: -15px; left: -15px; } /* Mniejsze przesunięcie na komórce */
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* =========================================
   PRZYCISK POWROTU DO GÓRY (Z PASKIEM POSTĘPU)
   ========================================= */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    
    /* Magiczna zmienna, która będzie zmieniana przez JS (od 0% do 100%) */
    --scroll-prog: 0%;
    /* Rysuje obwódkę ładującą się jak pasek postępu */
    background: conic-gradient(var(--color-accent) var(--scroll-prog), #1a1e1f var(--scroll-prog));
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Wewnętrzne kółko, które zasłania środek, tworząc efekt "pierścienia" */
.scroll-to-top::before {
    content: '';
    position: absolute;
    top: 3px;     /* Grubość paska postępu (3px) */
    left: 3px;
    right: 3px;
    bottom: 3px;
    background-color: var(--color-footer-bg);
    border-radius: 50%;
    z-index: -1;
    transition: background-color 0.3s ease;
}

.scroll-to-top i {
    z-index: 1;
    color: var(--color-accent);
    font-size: 1.1rem;
    transition: transform 0.3s ease, color 0.3s ease;
}

/* Efekty po najechaniu myszką */
.scroll-to-top:hover::before {
    background-color: var(--color-primary-dark);
}
.scroll-to-top:hover i {
    transform: translateY(-4px); /* Strzałka podskakuje do góry */
    color: var(--color-white);
}

/* Responsywność dla telefonów */
@media (max-width: 768px) {
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}