:root {
    --primary-color: #4db2ff;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #F5F5F5;
    --white: #FFFFFF;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.5;
    color: var(--text-dark);
    background-color: var(--white);
    padding-top: 0px;
}

/* Typography */
h1 {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 36px;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1.25rem;
}

h3 {
    font-size: 28px;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 1rem;
}

p {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.navbar {
    background-color: rgba(255, 255, 255, 0.95) !important; /* Полупрозрачный фон */
    backdrop-filter: blur(10px); /* Размытие фона */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    padding: 0rem;
    min-height: 48px;
    top: 0;
    width: 100%;
    z-index: 1000;
    position: sticky;
}

.navbar-brand {
    text-decoration: none;
    margin-left: 2rem;
    padding-top: 0;
    padding-bottom: 0;
}

.logo-img {
    height: 80px;
    width: auto;
}

.navbar-nav {
    margin-left: 0.25rem;
}
.navbar-toggler, .navbar-toggler:focus, .navbar-toggler-icon {
    box-shadow: none;
    border: none;
}

.navbar-toggler {
    height: 48px;
    border: none;
}

.navbar-toggler-icon {
    height: 24px;
    width: 24px;
    color: var(--text-dark);
    &.btn-close {
        height: 14px;
        width: 14px;
        margin: 0 5px;
        box-sizing: border-box;
        border-radius: 0;
    }
}
.navbar-collapse {
    order: 2;
}

.navbar-nav .nav-link {
    color: var(--text-dark);
    font-weight: 400;
    font-size: 18px;
    padding: 0.25rem 1.15rem !important;
    transition: var(--transition);
    text-decoration: none;
    position: relative;
}

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

.navbar-nav .nav-link:hover::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

/* Buttons */
.btn {
    border: none;
    padding: 12px 24px;
    font-size: 18px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
    cursor: pointer;
    border-radius: 0;
}

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

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

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;  /*Layer 2 over the white background*/
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-position: 50% 0%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    bottom: 25px;
    width: 100%;
    z-index: 2;  /*Layer 3 over the 1.jpg*/
}

.hero-card {
    background-color: rgba(255, 255, 255, 0.75);
    padding: 2rem 3rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: 2rem;
    backdrop-filter: blur(0px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border-radius: 6px;
}

/* Home Cards */
.home-sections {
    background-color: var(--text-dark);
}

.home-card {
    background-color: var(--text-dark);
    border-radius: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    overflow: hidden;
    height: 100%;
}

.home-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.home-card-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.home-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.home-card:hover .home-card-image img {
    transform: scale(1.05);
}

.home-card-content {
    padding: 2rem;
}

.home-card-content h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.home-card-content p {
    background-color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.card-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.card-link:hover {
    text-decoration: underline;
    color: var(--primary-color);
}

/* Back to Top Button */
.btn-back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-back-to-top:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Responsive Design */
@media (min-width: 1400px) {
    .hero-card {
        margin-left: 4rem;
    }
}

@media screen and (width < 992px) {

    h1 {
        font-size: 32px;
    }
    h2 {
        font-size: 24px;
    }
    h3 {
        font-size: 21px;
    }

    .hero-card {
        max-width: 550px;
        padding: 2rem;
        margin-left: 1.5rem;
    }
    .logo-img {
        height: 48px;
    }

    .navbar-collapse {
        background-color: var(--bg-light);
        padding: 30px 16px;
    }
    
    .navbar-brand {
        order: 1;
        margin-left: 0;
        margin-right: auto;
    }
    
    .navbar-nav .nav-link {
        font-size: 16px;
    }

    .navbar-nav .nav-link:hover {
        color: var(--text-dark);
    }

    .contacts-form {
        margin-bottom: 20px;
    }
}

@media screen and (width < 576px) {
    .hero-card {
        margin-left: 0.5rem;
        margin-right: 0.5rem;
        padding: 1.5rem;
        width: calc(100% - 1rem);
        & p:last-of-type {
            display: none;
        }
    }
    
    p {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .hero-card {
        margin-left: 0.25rem;
        margin-right: 0.25rem;
        padding: 1.25rem;
        width: calc(100% - 0.5rem);
    }

}

/* Utilities */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

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