@font-face {
    font-family: 'Liberation Sans';
    src: url('../fonts/LiberationSans-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

@font-face {
    font-family: 'Liberation Sans';
    src: url('../fonts/LiberationSans-Bold.ttf') format('truetype');
    font-weight: bold;
    font-style: normal;
}

@font-face {
    font-family: 'Liberation Sans';
    src: url('../fonts/LiberationSans-BoldItalic.ttf') format('truetype');
    font-weight: bold;
    font-style: italic;
}

@font-face {
    font-family: 'Liberation Sans';
    src: url('../fonts/LiberationSans-Italic.ttf') format('truetype');
    font-weight: normal;
    font-style: italic;
}

/* Modern Design System Variables */
:root {
    --primary-color: #f1c40f;
    /* Яркий желтый */
    --hover-color: #f39c12;
    /* Темно-желтый для ховера */
    --dark-bg: #1a1a1a;
    --dark-text: #2c3e50;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.1);
    --radius-md: 12px;
    --radius-lg: 20px;
    --container-width: 1200px;
    --font-main: 'Liberation Sans', Arial, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
    font-size: 1.1em;
    line-height: 1.6;
    /* hyphens: auto; - Removed to prevent awkward word breaks */
    font-family: var(--font-main);
    color: var(--dark-text);
    background-color: var(--light-bg);
}

/* Typography Enhancements */
h1,
h2,
h3 {
    margin-top: 0;
    line-height: 1.3;
}

h2 {
    font-size: 2.2em;
    margin-bottom: 1em;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 15px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* Custom List - Grid Cards */
.custom-list {
    counter-reset: list-item;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    list-style: none;
    padding: 0;
    margin: 40px 0;
}

.custom-list li {
    counter-increment: list-item;
    position: relative;
    background: var(--white);
    padding: 30px 30px 30px 80px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: center;
}

.custom-list li:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.custom-list li::before {
    content: counter(list-item);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: var(--dark-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2em;
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: 0 4px 10px rgba(241, 196, 14, 0.4);
}

/* Hero Section & Backgrounds */
.fixed-texture-background {
    background-image: url('../img/backgroud.jpg');
    background-size: auto;
    background-repeat: repeat;
    background-attachment: fixed;
    background-position: center;
}

.bgImgCenter {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    margin: 20px auto;
    padding: 60px;
    max-width: var(--container-width);
    box-shadow: var(--shadow-soft);
}

.bgImgCenter h2 {
    font-size: 1.8em;
    color: #333;
    border: none;
    text-transform: none;
}

.bgImgCenter h2::after {
    display: none;
}

.head-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.leftbgImg {
    border-left: 5px solid var(--primary-color);
    padding-left: 25px;
    margin: 0;
}

/* Chapters/Sections */

/* Interactive Methods List */
.chapter {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 60px;
    margin: 40px auto;
    max-width: var(--container-width);
    box-shadow: var(--shadow-soft);
    text-align: left;
}

/* Interactive Methods List */
.methods-list li {
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.methods-list li:hover:not(.disabled) {
    background-color: var(--primary-color);
    color: var(--dark-text);
    padding-left: 20px;
    transform: translateX(5px);
}

.methods-list li.disabled {
    cursor: default;
    opacity: 0.7;
}

.methods-list li.disabled:hover {
    background-color: transparent;
    color: inherit;
    transform: none;
    padding-left: 15px;
    /* Keep original padding */
}

.methods-list .arrow {
    opacity: 0;
    transition: opacity 0.3s ease;
    font-weight: bold;
}

.methods-list li:hover:not(.disabled) .arrow {
    opacity: 1;
}

.methods-list li::before {
    transition: opacity 0.3s ease;
}

.methods-list li:hover:not(.disabled)::before {
    opacity: 0;
}

/* Method Detail View */
.method-detail {
    animation: fadeIn 0.5s ease;
}

.back-btn {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--dark-text);
    padding: 10px 20px;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    margin: 20px 0;
    transition: all 0.3s ease;
    display: inline-block;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chapter h2 {
    text-align: center;
}

/* Images */
/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    /* Desktop defaults */
    display: block;
    margin: 0 auto;
    width: 30%;
    /* Vernem iskhodniy razmer */
}

.img-wide {
    width: 80%;
}


/* Contact Section adjustments */
.footcol h3 {
    margin: 0;
    /* Removed color: var(--primary-color) to restore default dark text */
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {

    .bgImgCenter,
    .chapter {
        padding: 30px 20px;
        margin: 20px 10px;
    }

    .head-container {
        grid-template-columns: 1fr;
    }

    .custom-list {
        grid-template-columns: 1fr;
    }

    .img-wide,
    img {
        width: 100%;
    }

    h2 {
        font-size: 1.8em;
    }
}