/* ==========================================================================
   Home Lider Nieruchomości - Premium Design System & Styles
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
    /* Color Palette - Premium Real Estate */
    --color-primary: #113225;     /* Deep Noble Green */
    --color-primary-light: #1b4d39;
    --color-accent: #d4af37;      /* Subtle Gold / Amber */
    --color-accent-hover: #bc9b2b;
    
    --color-bg-main: #fcfcfc;     /* Clean light background */
    --color-bg-alt: #f4f6f5;      /* Section alternate background */
    --color-bg-dark: #121212;
    
    --color-text-main: #2b2b2b;   /* Dark graphite for readability */
    --color-text-muted: #666666;
    --color-text-light: #ffffff;
    
    --color-border: rgba(17, 50, 37, 0.1);
    --color-glass-bg: rgba(255, 255, 255, 0.85);
    --color-glass-dark: rgba(17, 50, 37, 0.8);
    
    /* Typography */
    --font-main: 'Roboto', sans-serif;
    
    /* Transitions & Shadows */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s ease;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 24px rgba(17, 50, 37, 0.08);
    --shadow-lg: 0 16px 40px rgba(17, 50, 37, 0.12);
    
    /* Layout */
    --header-height: 68px;
    --container-width: 1240px;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-main);
    color: var(--color-text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* Section Common Styles */
.section {
    padding: 100px 0;
    position: relative;
}

.section-alt {
    background-color: var(--color-bg-alt);
}

.section-bg,
.section-bg-dark {
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    z-index: 1;
}

.section-bg::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom, rgba(17, 50, 37, 0.82), rgba(10, 30, 20, 0.92));
    z-index: -1;
}

.section-bg-dark::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom, rgba(15, 23, 42, 0.88), rgba(17, 50, 37, 0.94));
    z-index: -1;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-subtitle {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-accent);
    margin-bottom: 12px;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    outline: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-text-light);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    background-color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.header.scrolled {
    height: 60px;
}

.nav {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    transition: var(--transition-normal);
}

.logo-img {
    height: 56px;
    width: auto;
    display: block;
    transition: var(--transition-normal);
}

.header.scrolled .logo-img {
    height: 48px;
}

.logo-accent {
    color: var(--color-accent);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-link {
    font-weight: 500;
    color: var(--color-text-main);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-cta {
    display: block;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    position: absolute;
    transition: var(--transition-normal);
}

.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 9px; }
.menu-toggle span:nth-child(3) { top: 18px; }

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 9px;
    background-color: var(--color-primary);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 9px;
    background-color: var(--color-primary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    height: 100vh;
    min-height: 700px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(
        100deg,
        rgba(17, 50, 37, 0.85) 0%,
        rgba(17, 50, 37, 0.6) 45%,
        rgba(17, 50, 37, 0.1) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    color: var(--color-text-light);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.hero-desc {
    font-size: 1.125rem;
    font-weight: 400;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 680px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
    text-align: justify;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero .btn-secondary {
    border-color: rgba(255, 255, 255, 0.6);
    color: var(--color-text-light);
}

.hero .btn-secondary:hover {
    background-color: #ffffff;
    color: var(--color-primary);
}

/* ==========================================================================
   Oferta Section
   ========================================================================== */

.offer-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.offer-card {
    flex: 0 1 380px;
    width: 100%;
    max-width: 380px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 40px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.offer-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.offer-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

.offer-card:hover::before {
    transform: scaleX(1);
}

.offer-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background-color: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--color-primary);
    transition: var(--transition-normal);
}

.offer-card:hover .offer-icon {
    background-color: var(--color-primary);
    color: var(--color-accent);
}

.offer-card-title {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.offer-card-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   O Firmie Section
   ========================================================================== */

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-lead {
    font-size: 1.35rem;
    font-weight: 500;
    color: var(--color-primary);
    line-height: 1.4;
    margin-bottom: 24px;
}

.about-text {
    color: var(--color-text-muted);
    margin-bottom: 24px;
    text-align: justify;
}

.about-features {
    margin-top: 32px;
}

.about-features-title {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.features-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    color: var(--color-text-main);
}

.feature-check {
    color: var(--color-accent);
    flex-shrink: 0;
}

.about-motto {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    font-style: italic;
}

.about-images-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    position: relative;
}

.about-images-grid .about-img-wrapper {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    height: 240px;
}

.about-images-grid .about-img-wrapper:nth-child(2n) {
    transform: translateY(24px);
}

.about-images-grid .about-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.about-images-grid .about-img-wrapper:hover img {
    transform: scale(1.08);
}

/* ==========================================================================
   Galeria Section
   ========================================================================== */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 280px;
    gap: 20px;
}

/* Mosaic layouts for 10 items */
.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.gallery-item:nth-child(1) { grid-column: span 2; grid-row: span 2; }
.gallery-item:nth-child(4) { grid-column: span 2; }
.gallery-item:nth-child(7) { grid-row: span 2; }
.gallery-item:nth-child(8) { grid-column: span 2; }

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.gallery-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to top, rgba(17, 50, 37, 0.8), rgba(17, 50, 37, 0.2));
    opacity: 0;
    transition: var(--transition-normal);
    display: flex;
    align-items: flex-end;
    padding: 24px;
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-zoom {
    color: #ffffff;
    background: var(--color-accent);
    width: 44px; height: 44px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0.5);
    transition: var(--transition-normal);
}

.gallery-item:hover .gallery-zoom {
    transform: translate(-50%, -50%) scale(1);
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(10, 10, 10, 0.92);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-normal);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.lightbox.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-content {
    max-width: 90%;
    max-height: 85vh;
    position: relative;
    transform: scale(0.95);
    transition: var(--transition-normal);
}

.lightbox.active .lightbox-content {
    transform: scale(1);
}

.lightbox-img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.lightbox-close {
    position: absolute;
    top: -40px; right: 0;
    color: #ffffff;
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.lightbox-close:hover {
    color: var(--color-accent);
}

/* ==========================================================================
   Opinie Section
   ========================================================================== */

.reviews-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.review-card {
    flex: 0 1 380px;
    width: 100%;
    max-width: 380px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 40px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border: 1px solid rgba(255, 255, 255, 0.15);
    position: relative;
}

.review-quote-icon {
    position: absolute;
    top: 24px; right: 32px;
    font-size: 4rem;
    color: var(--color-bg-alt);
    line-height: 0;
    z-index: 0;
    font-family: serif;
}

.review-text {
    font-size: 1.05rem;
    font-style: italic;
    color: var(--color-text-main);
    position: relative;
    z-index: 1;
    margin-bottom: 24px;
    text-align: justify;
}

.review-author {
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-author::before {
    content: '';
    width: 20px; height: 2px;
    background-color: var(--color-accent);
}

/* ==========================================================================
   Kontakt Section
   ========================================================================== */

.contact-container {
    background-color: #ffffff;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: grid;
    grid-template-columns: 5fr 7fr;
    border: 1px solid var(--color-border);
}

.contact-info {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-text-light);
    padding: 60px 48px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.contact-info::before {
    content: '';
    position: absolute;
    bottom: -50px; right: -50px;
    width: 200px; height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
}

.contact-info-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info-desc {
    opacity: 0.85;
    margin-bottom: 40px;
    font-weight: 300;
    text-align: justify;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 48px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-item-icon {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-item-text {
    font-weight: 500;
}

.contact-slogan {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-accent);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
}

/* Form */
.contact-form-wrapper {
    padding: 60px 48px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 16px 20px;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-alt);
    font-family: var(--font-main);
    font-size: 1rem;
    color: var(--color-text-main);
    transition: var(--transition-fast);
    outline: none;
}

.form-textarea {
    resize: vertical;
    min-height: 140px;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--color-accent);
    background-color: #ffffff;
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.1);
}

.form-submit {
    margin-top: 12px;
    align-self: flex-start;
}

.form-message {
    display: none;
    padding: 20px;
    border-radius: 12px;
    font-weight: 500;
    margin-top: 20px;
    text-align: center;
}

.form-message.success {
    display: block;
    background-color: rgba(46, 125, 50, 0.1);
    color: #2e7d32;
    border: 1px solid rgba(46, 125, 50, 0.2);
}

.form-message.error {
    display: block;
    background-color: rgba(211, 47, 47, 0.1);
    color: #d32f2f;
    border: 1px solid rgba(211, 47, 47, 0.2);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background-color: var(--color-bg-dark);
    color: #ffffff;
    padding: 60px 0 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 40px;
    margin-bottom: 40px;
}

.footer-desc {
    color: var(--color-text-muted);
    max-width: 400px;
    margin-top: 12px;
    font-size: 0.9rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ==========================================================================
   Animations & Responsiveness
   ========================================================================== */

/* Fade In animations triggered by JS */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1024px) {
    :root {
        --font-title: 2rem;
    }
    
    .section { padding: 80px 0; }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery-item:nth-child(1),
    .gallery-item:nth-child(4),
    .gallery-item:nth-child(7),
    .gallery-item:nth-child(8) {
        grid-column: span 1;
        grid-row: span 1;
    }
}

@media (max-width: 768px) {
    .header .nav-list {
        position: fixed;
        top: 0; left: 0; width: 100%; height: 100vh;
        background-color: var(--color-bg-dark);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transform: translateY(-100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .header .nav-list.active {
        transform: translateY(0);
    }
    
    .nav-link {
        font-size: 1.5rem;
    }
    
    .nav-cta { display: none; }
    .menu-toggle { display: block; }
    
    .hero-title { font-size: 2.5rem; }
    .section-title { font-size: 2rem; }
    
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-images-grid { order: -1; }
    
    .contact-info, .contact-form-wrapper { padding: 40px 24px; }
    
    .footer-content { flex-direction: column; gap: 24px; text-align: center; }
    .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}

@media (max-width: 480px) {
    .gallery-grid { grid-template-columns: 1fr; }
    .features-list { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; width: 100%; }
    .hero-actions .btn { width: 100%; }
}