:root {
    --primary-bg: #ffffff;
    --primary-text: #0f172a;
    --secondary-bg: #f8fafc;
    --secondary-text: #475569;
    --accent-bg: #2563eb;
    --accent-text: #ffffff;
    --dark-bg: #1e293b;
    --dark-text: #f8fafc;
    --border-radius: 0.5rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--primary-bg);
    color: var(--secondary-text);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--primary-text);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

a,
a:hover,
a:focus {
    text-decoration: none;
    transition: color 0.2s ease-in-out, background-color 0.2s ease-in-out;
}

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

ul,
ol {
    list-style: none;
    padding: 0;
    margin: 0;
}

button,
.btn {
    cursor: pointer;
    border: none;
    outline: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease-in-out;
}

* {
    box-sizing: border-box;
}

input,
select,
textarea {
    accent-color: var(--accent-bg);
}

@media (max-width: 768px) {
    body {
        font-size: 0.9375rem;
    }

    h1 {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    h2 {
        font-size: clamp(1.5rem, 6vw, 2rem);
    }

    h3 {
        font-size: clamp(1.25rem, 5vw, 1.75rem);
    }

    .mobile-responsive-text {
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
}

/* ===== header ===== */
#site-header {
    overflow: hidden;
}

.js-mobile-menu-overlay {
    hyphens: auto;
    transition: opacity 0.3s ease;
}

.bi-list::before {
    content: '\f479';
}

.bi-x-lg::before {
    content: '\f659';
}

/* ===== hero_section ===== */
#hero {
    overflow: hidden;
    position: relative;
}

.js-scroll-link {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ===== promo_kingkong ===== */
#promo {
    overflow: hidden;
}

#promo h2 {
    hyphens: auto;
    line-height: 1.2;
}

#promo .container {
    width: 100%;
}

#promo img {
    width: 100%;
}

.js-scroll-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ===== design_categories ===== */
#categories {
    overflow: hidden;
}

.hyphens-auto {
    hyphens: auto;
}

#categories .container {
    width: 100%;
}

/* ===== specifications ===== */
#benefits {
    hyphens: auto;
}

.js-benefit-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.js-benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    border-color: #2563eb;
}

/* ===== order_section ===== */
input::placeholder,
select::placeholder {
    color: #94a3b8;
}

select:invalid {
    color: #94a3b8;
}

.js-order-form {
    hyphens: auto;
}

/* ===== footer ===== */
#footer a {
    text-decoration: none;
}

#footer .hyphens-auto {
    hyphens: auto;
}

#footer i {
    font-size: 1.1rem;
}