/* 
* Main Stylesheet
* krupnaya-ovsyanka.com - Porównanie Firm Gazowych
*/

/* =============== Base Styles =============== */
:root {
    /* Colors */
    --primary-color: #1e88e5;
    --secondary-color: #0d47a1;
    --accent-color: #ff9800;
    --text-color: #333333;
    --text-light: #666666;
    --background-light: #f8f9fa;
    --background-white: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #4caf50;
    --error-color: #f44336;
    --warning-color: #ff9800;
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 6px;
    --border-radius-lg: 10px;
    
    /* Shadows */
    --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--text-color);
    background-color: var(--background-white);
}

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

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

a:hover, a:focus {
    color: var(--secondary-color);
    text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

p {
    margin-bottom: var(--spacing-md);
}

ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

/* =============== Helper Classes =============== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.text-center {
    text-align: center;
}

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =============== Buttons =============== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--secondary-color);
    color: white;
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
}

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

.btn-outline:hover, .btn-outline:focus {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
}

/* =============== Header =============== */
.site-header {
    position: sticky;
    top: 0;
    background-color: var(--background-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav li {
    margin-left: var(--spacing-xl);
}

.main-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.main-nav a:hover, .main-nav a:focus {
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: transform var(--transition-fast);
}

/* =============== Hero Section =============== */
.hero {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-light);
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hero-content {
    flex: 1;
    padding-right: var(--spacing-xxl);
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xl);
}

.hero-image {
    flex: 1;
    max-width: 500px;
}

/* =============== Section Styles =============== */
.section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* About Section */
.about-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xxl);
}

.about-text {
    flex: 1;
}

.about-image {
    flex: 1;
}

/* Companies Grid */
.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.company-card {
    background-color: var(--background-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.company-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.company-logo {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    height: 80px;
    align-items: center;
}

.company-logo img {
    max-height: 100%;
    object-fit: contain;
}

.company-card h3 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.rating {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-sm);
}

.stars {
    color: var(--warning-color);
}

.company-details {
    padding-left: 0;
    list-style-type: none;
    margin-bottom: var(--spacing-md);
}

.company-details li {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.company-details li:last-child {
    border-bottom: none;
}

/* Equipment Grid */
.equipment-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xxl);
}

.equipment-item {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.equipment-item:nth-child(even) {
    flex-direction: row-reverse;
}

.equipment-image {
    flex: 1;
    max-width: 300px;
}

.equipment-content {
    flex: 2;
}

.equipment-content h3 {
    margin-bottom: var(--spacing-md);
}

.equipment-content ul {
    margin-top: var(--spacing-md);
}

/* Profitability Section */
.profitability-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xxl);
}

.profitability-text {
    flex: 1.5;
}

.profitability-image {
    flex: 1;
}

.profitability-text h3 {
    margin-bottom: var(--spacing-md);
}

.profitability-text h4 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

/* Blog Grid */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.blog-card {
    background-color: var(--background-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.blog-image {
    height: 200px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-content {
    padding: var(--spacing-lg);
}

.blog-content h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.blog-date {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

/* Subscription Form */
.subscription-content {
    display: flex;
    gap: var(--spacing-xxl);
    align-items: center;
}

.subscription-text {
    flex: 1;
}

.subscription-image {
    margin-top: var(--spacing-xl);
}

.subscription-form {
    flex: 1;
    background-color: var(--background-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"] {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="tel"]:focus {
    border-color: var(--primary-color);
    outline: none;
}

.form-group.checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.form-group.checkbox input {
    margin-top: 5px;
}

.form-group.checkbox label {
    font-weight: normal;
    font-size: 0.9rem;
}

/* Thank You Page */
.thank-you {
    padding: var(--spacing-xxl) 0;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.thank-you-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.thank-you-icon {
    margin-bottom: var(--spacing-xl);
}

.thank-you-content h1 {
    margin-bottom: var(--spacing-lg);
    color: var(--success-color);
}

.subscription-details {
    background-color: var(--background-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    margin: var(--spacing-xl) 0;
}

/* =============== Footer =============== */
.site-footer {
    background-color: #000;
    color: white;
    padding-top: var(--spacing-xxl);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xxl);
}

.footer-logo {
    flex: 1;
    min-width: 250px;
}

.footer-logo p {
    margin-top: var(--spacing-md);
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    flex: 2;
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
}

.footer-column {
    flex: 1;
    min-width: 150px;
}

.footer-column h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: background-color var(--transition-fast);
    color: white;
}

.social-links a:hover {
    background-color: var(--primary-color);
}

.copyright {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

address {
    font-style: normal;
    line-height: 1.8;
}

address p {
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
}

/* =============== Cookie Consent =============== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--background-white);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    display: none;
}

.cookie-content {
    padding: var(--spacing-lg);
    max-width: var(--container-width);
    margin: 0 auto;
}

.cookie-content h3 {
    margin-bottom: var(--spacing-sm);
}

.cookie-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--background-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
    width: 90%;
    max-width: 600px;
    position: relative;
}

.close-modal {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 1.5rem;
    cursor: pointer;
}

.cookie-options {
    margin: var(--spacing-lg) 0;
}

.cookie-option {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.cookie-option:last-child {
    border-bottom: none;
}

.cookie-option label {
    font-weight: 600;
    margin-left: var(--spacing-sm);
}

.cookie-option p {
    margin-top: var(--spacing-sm);
    margin-left: 1.7rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.modal-buttons {
    display: flex;
    justify-content: flex-end;
}

/* =============== Media Queries =============== */
@media (max-width: 1024px) {
    :root {
        --font-size-base: 15px;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .equipment-item, 
    .equipment-item:nth-child(even) {
        flex-direction: column;
    }
    
    .equipment-image {
        max-width: 100%;
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: var(--spacing-xl);
    }
    
    .about-content,
    .profitability-content,
    .subscription-content {
        flex-direction: column;
    }
    
    .subscription-form {
        width: 100%;
    }
    
    .footer-logo,
    .footer-links,
    .footer-column {
        flex: 1 1 100%;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 576px) {
    :root {
        --font-size-base: 14px;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .cookie-buttons {
        flex-direction: column;
    }
    
    .companies-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* Main navigation - mobile */
@media (max-width: 768px) {
    .main-nav.active {
        display: block;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--background-white);
        box-shadow: var(--shadow-md);
    }
    
    .main-nav.active ul {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    
    .main-nav.active li {
        margin: 0;
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .main-nav.active li:last-child {
        border-bottom: none;
    }
}

/* Mobile menu toggle animation */
.mobile-menu-toggle.active span:first-child {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:last-child {
    transform: rotate(-45deg) translate(5px, -5px);
}