:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --border-color: #e9ecef;
    --success-color: #2ecc71;
    --font-size-large: 3rem;
    --font-size-medium: 1.5rem;
    --font-size-small: 1.2rem;
    --line-height: 1.6;
}


*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font: inherit;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: var(--line-height);
    color: var(--dark-color);
    background-color: #fff;
    font-size: var(--font-size-small);
    padding-top: 60px;

    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 15px;
}


h1,
h2,
h3 {
    margin-bottom: 20px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--primary-color);
}

h1 {
    font-size: var(--font-size-large);
}

h2,
h3 {
    font-size: var(--font-size-medium);
}

h3 {
    margin-top: 15px;
}

p {
    margin-bottom: 1.5rem;
    font-size: var(--font-size-small);
    color: #444;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #2980b9;
}


.btn {
    display: inline-block;
    padding: 0.75rem 1.8rem;
    font-size: var(--font-size-small);
    font-weight: 500;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    touch-action: manipulation;
}

.primary-btn {
    background-color: var(--secondary-color);
    color: white;
    padding: 0.8rem 2.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.primary-btn:hover {
    background-color: #2980b9;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(52, 152, 219, 0.2);
}


.icon-box {
    width: 50px;
    height: 50px;
    background-color: rgba(52, 152, 219, 0.1);
    border-radius: 50%;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.icon-box i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}


header.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    min-height: 60px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.navbar .container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}


.navbar-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.navbar-logo {
    height: 40px;

    width: auto;
    margin-right: 10px;

    vertical-align: middle;
}

.navbar-text {
    font-size: 1.5rem;

    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin-left: 1.5rem;
}

.nav-menu a {
    font-size: var(--font-size-small);
    color: var(--primary-color);
    font-weight: 500;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
    touch-action: manipulation;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--secondary-color);
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    background: none;
    border: none;
    touch-action: manipulation;
}


@media (max-width: 992px) {
    :root {
        --font-size-large: 2rem;
        --font-size-medium: 1.4rem;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-large: 1.8rem;
        --font-size-medium: 1.3rem;
    }

    .hamburger {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100% - 60px);

        background-color: #fff;
        -webkit-box-orient: vertical;
        -webkit-box-direction: normal;
        -ms-flex-direction: column;
        flex-direction: column;
        -webkit-box-align: center;
        -ms-flex-align: center;
        align-items: center;
        -webkit-box-pack: center;
        -ms-flex-pack: center;
        justify-content: center;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        overflow-y: auto;
    }

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

    .nav-menu li {
        margin: 1.5rem 0;
    }

    .nav-menu a {
        font-size: 1.4rem;
    }

    .navbar-logo {
        height: 32px;

        margin-right: 8px;
    }

    .navbar-text {
        font-size: 1.3rem;

    }

    .navbar-brand {
        flex-shrink: 0;

    }
}

@media (max-width: 576px) {
    :root {
        --font-size-large: 1.7rem;
        --font-size-medium: 1.2rem;
        --font-size-small: 0.95rem;
    }

    .navbar-logo {
        height: 28px;

        margin-right: 6px;
    }

    .navbar-text {
        font-size: 1.2rem;

    }
}