:root {
    /* Цветовая палитра */
    --color-primary: #ff5402;
    --color-primary-dark: #e04500;
    --color-secondary: #0f172a;
    --color-text-main: #334155;
    --color-text-light: #64748b;
    --color-bg-body: #f1f5f9;
    --color-bg-card: #ffffff;
    --color-border: #e2e8f0;
    --color-success: #10b981;
    --color-accent-blue: #007bff;

    /* Типографика */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --line-height-base: 1.6;
    --font-size-base: 1rem;

    /* Размеры и отступы */
    --container-width: 1200px;
    --border-radius-lg: 16px;
    --border-radius-md: 8px;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Тени */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 20px rgba(255, 84, 2, 0.3);

    /* Анимации */
    --transition-base: all 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg-body);
    color: var(--color-text-main);
    line-height: var(--line-height-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--color-primary-dark);
}

ul, ol {
    list-style: none;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.site-content {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    line-height: 1.2;
}

h1.entry-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    text-align: center;
    position: relative;
    padding-bottom: var(--spacing-md);
}

h1.entry-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent-blue));
    border-radius: 2px;
}

h2 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    margin-top: var(--spacing-lg);
    border-left: 5px solid var(--color-primary);
    padding-left: var(--spacing-md);
}

p {
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
}

/* --- Components: Buttons --- */
.btn-box {
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff !important;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%) !important;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px -5px rgba(255, 84, 2, 0.4);
}

.btn:hover::before {
    opacity: 1;
}

.btn:active {
    transform: translateY(-1px);
}

/* --- Components: Cards & Content --- */
.content-area, .widget-area {
    display: flex;
    flex-direction: column;
}

/* Article Styling */
article {
    background: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.entry-content img {
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    margin: var(--spacing-md) auto;
    transition: transform 0.3s ease;
}

.entry-content img:hover {
    transform: scale(1.01);
}

/* Lists Styling */
.entry-content ul {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.entry-content ul li {
    position: relative;
    margin-bottom: var(--spacing-sm);
    padding-left: 1.5rem;
}

.entry-content ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Blockquotes */
blockquote.check {
    background: #fff5f0;
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    font-style: italic;
    color: var(--color-text-main);
}

/* --- Sidebar --- */
.widget {
    background: var(--color-bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.widget-header {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-bg-body);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.widget a {
    display: block;
    color: var(--color-text-light);
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--color-border);
}

.widget a:hover {
    color: var(--color-primary);
    padding-left: 5px;
    border-bottom-color: var(--color-primary);
}

/* --- Footer --- */
.site-footer {
    background: var(--color-secondary);
    color: #94a3b8;
    padding: var(--spacing-xl) 0;
    margin-top: auto;
    text-align: center;
}

.site-footer-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-info {
    font-size: 0.9rem;
}

/* --- Scroll Top Button --- */
.scrolltop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scrolltop::after {
    content: '↑';
    font-size: 1.5rem;
    line-height: 1;
}

.scrolltop.is-visible { /* Класс должен добавляться JS */
    opacity: 1;
    visibility: visible;
}

.scrolltop:hover {
    background-color: var(--color-secondary);
    transform: translateY(-5px);
}

/* --- Form Styling (General) --- */
input[type="text"], 
input[type="email"], 
textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: var(--transition-base);
    background-color: #f8fafc;
}

input:focus, 
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 84, 2, 0.1);
    background-color: #fff;
}

/* --- Media Queries --- */
@media (max-width: 992px) {
    .site-content {
        grid-template-columns: 1fr; /* Stack layout on tablets */
    }

    #secondary {
        order: 2; /* Sidebar below content */
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: 0 1rem;
    }
    
    article {
        padding: 1.5rem;
    }

    h1.entry-title {
        font-size: 1.75rem;
    }
    
    .btn {
        width: 100%; /* Full width buttons on mobile */
        padding: 1rem;
    }
}

/* --- Accessibility --- */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background-color: #fff;
    clip: auto !important;
    clip-path: none;
    color: var(--color-secondary);
    display: block;
    font-size: 1rem;
    font-weight: bold;
    height: auto;
    left: 5px;
    line-height: normal;
    padding: 15px 23px 14px;
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
    box-shadow: 0 0 2px 2px rgba(0,0,0,.6);
}