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

html {
    overflow-x: hidden;
}

:root {
    --primary-color: #5d73a8;
    --secondary-color: #7b94c5;
    --accent-color: #9db3e0;
    --text-dark: #1a1a2e;
    --text-light: #4a4a6a;
    --bg-light: #e8eaf6;
    --bg-white: rgba(255, 255, 255, 0.85);
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
    --border-radius: 17px;
    --spacing-unit: 1.73rem;
    --transition: all 0.32s ease;
    --shadow-light: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --shadow-medium: 0 8px 32px 0 rgba(31, 38, 135, 0.25);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

header {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-light);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.32rem var(--spacing-unit);
    overflow: hidden;
    min-width: 0;
}

.logo {
    font-size: 1.73rem;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
    background: var(--glass-bg);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    padding: 0.57rem 1.15rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 1;
    min-width: 0;
    max-width: calc(100% - 60px);
}

.logo:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.32rem;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 1.02rem;
    transition: var(--transition);
    position: relative;
    padding: 0.57rem 1.15rem;
    border-radius: calc(var(--border-radius) - 4px);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.burger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    flex-shrink: 0;
    margin-left: 1rem;
}

.burger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
}

.hero {
    padding: 8.73rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

.hero-content {
    position: relative;
    z-index: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 4.32rem 3.15rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-medium);
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.57rem;
    margin-bottom: 1.73rem;
    color: var(--text-dark);
    font-weight: 700;
}

.hero p {
    font-size: 1.32rem;
    margin-bottom: 2.57rem;
    color: var(--text-light);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 1.15rem 2.73rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-dark);
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    font-weight: 600;
    font-size: 1.15rem;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

.btn:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.section-title {
    font-size: 2.73rem;
    margin-bottom: 3.15rem;
    text-align: center;
    color: var(--text-dark);
    font-weight: 700;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.57rem;
    margin-bottom: 4.32rem;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    padding: 2.32rem;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    background: rgba(255, 255, 255, 0.3);
}

.card img {
    width: 100%;
    height: auto;
    border-radius: calc(var(--border-radius) - 4px);
    margin-bottom: 1.73rem;
    border: 1px solid var(--glass-border);
}

.card h3 {
    font-size: 1.57rem;
    margin-bottom: 1.15rem;
    color: var(--text-dark);
    font-weight: 600;
}

.card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.15rem;
}

.about-content {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 3.15rem 2.73rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    margin-bottom: 4.32rem;
    box-shadow: var(--shadow-light);
}

.about-content p {
    margin-bottom: 1.73rem;
    color: var(--text-light);
    font-size: 1.15rem;
    line-height: 1.8;
}

.about-content p:last-child {
    margin-bottom: 0;
}

.features {
    padding: 4.32rem 0;
}

.feature-item {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 2.32rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    background: rgba(255, 255, 255, 0.3);
}

.feature-item h3 {
    font-size: 1.57rem;
    margin-bottom: 1.15rem;
    color: var(--text-dark);
    font-weight: 600;
}

.feature-item p {
    color: var(--text-light);
    line-height: 1.8;
}

footer {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-top: 1px solid var(--glass-border);
    padding: 4.32rem 0 2.32rem;
    margin-top: 6.73rem;
    box-shadow: 0 -8px 32px 0 rgba(31, 38, 135, 0.15);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3.15rem;
    margin-bottom: 3.15rem;
}

.footer-section h3 {
    font-size: 1.32rem;
    margin-bottom: 1.73rem;
    color: var(--text-dark);
    font-weight: 600;
}

.footer-section a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 1.15rem;
    transition: var(--transition);
    padding: 0.57rem;
    border-radius: calc(var(--border-radius) - 8px);
}

.footer-section a:hover {
    color: var(--text-dark);
    background: rgba(255, 255, 255, 0.2);
    padding-left: 1.15rem;
}

.footer-section p {
    color: var(--text-light);
    margin-bottom: 0.73rem;
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 2.32rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-light);
}

form {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 3.15rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-light);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 2.32rem;
}

form label {
    display: block;
    margin-bottom: 0.73rem;
    color: var(--text-dark);
    font-weight: 600;
}

form input,
form textarea {
    width: 100%;
    padding: 1.15rem;
    border: 1px solid var(--glass-border);
    border-radius: calc(var(--border-radius) - 4px);
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    color: var(--text-dark);
    font-size: 1.02rem;
    transition: var(--transition);
}

form input:focus,
form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 3px rgba(93, 115, 168, 0.1);
}

form textarea {
    resize: vertical;
    min-height: 150px;
}

form button[type="submit"] {
    width: 100%;
    padding: 1.15rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-dark);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.15rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

form button[type="submit"]:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.73rem;
    margin-bottom: 2.32rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.32rem;
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: 400;
    font-size: 0.95rem;
}

.page-header {
    padding: 4.32rem 0;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin-bottom: 4.32rem;
    border-bottom: 1px solid var(--glass-border);
}

.page-header h1 {
    font-size: 3.15rem;
    color: var(--text-dark);
    font-weight: 700;
    margin-bottom: 1.15rem;
}

.page-header p {
    font-size: 1.32rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    nav {
        padding: 1rem var(--spacing-unit);
    }

    .logo {
        font-size: 1.15rem;
        padding: 0.4rem 0.8rem;
        max-width: calc(100% - 50px);
    }

    .nav-links {
        position: fixed;
        right: 0;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.7);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        width: 80%;
        text-align: center;
        transition: var(--transition);
        padding: 2.32rem;
        border-radius: var(--border-radius);
        border: 1px solid var(--glass-border);
        box-shadow: var(--shadow-medium);
        gap: 1.15rem;
        transform: translateX(100%);
        z-index: 999;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .burger {
        display: flex;
    }

    .hero h1 {
        font-size: 2.32rem;
    }

    .hero p {
        font-size: 1.15rem;
    }

    .hero-content {
        padding: 2.73rem 1.73rem;
    }

    .section-title {
        font-size: 2.15rem;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1.73rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.32rem;
    }

    .page-header h1 {
        font-size: 2.32rem;
    }

    form {
        padding-left: 10px;
        padding-right: 10px;
    }
}

.content-page {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 3.15rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-light);
    margin-top: 2.32rem;
    margin-bottom: 4.32rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.content-page h2 {
    color: var(--text-dark);
    margin-top: 2.73rem;
    margin-bottom: 1.73rem;
    font-size: 2.15rem;
    font-weight: 600;
}

.content-page h2:first-of-type {
    margin-top: 1.73rem;
}

.content-page h3 {
    color: var(--text-dark);
    margin-top: 2.15rem;
    margin-bottom: 1.15rem;
    font-size: 1.57rem;
    font-weight: 600;
}

.content-page p {
    color: var(--text-light);
    margin-bottom: 1.73rem;
    line-height: 1.8;
    font-size: 1.02rem;
}

.content-page ul {
    margin-left: 2.32rem;
    margin-bottom: 1.73rem;
    color: var(--text-light);
}

.content-page li {
    margin-bottom: 0.73rem;
    line-height: 1.8;
}

@media (max-width: 480px) {
    :root {
        --spacing-unit: 1.15rem;
    }

    nav {
        padding: 0.8rem var(--spacing-unit);
    }

    .logo {
        font-size: 0.95rem;
        padding: 0.35rem 0.6rem;
        max-width: calc(100% - 45px);
    }

    .burger {
        margin-left: 0.5rem;
    }

    .burger span {
        width: 22px;
        height: 2.5px;
    }

    .hero {
        padding: 4.32rem 0;
    }

    .hero h1 {
        font-size: 1.73rem;
    }

    .hero p {
        font-size: 1.02rem;
    }

    .hero-content {
        padding: 2.15rem 1.15rem;
    }

    .section-title {
        font-size: 1.73rem;
    }

    .card {
        padding: 1.73rem;
    }

    .about-content {
        padding: 2.15rem 1.73rem;
    }

    .content-page {
        padding: 2.15rem 1.73rem;
    }

    .content-page h2 {
        font-size: 1.73rem;
    }
}