/* =========================================
   1. CSS Reset & Base Styles
   ========================================= */
:root {
    /* Цветовая палитра */
    --color-primary: #1e3c72; /* Глубокий синий */
    --color-primary-light: #2a5298;
    --color-accent: #7cb048; /* Зеленый из HTML */
    --color-accent-hover: #6a963d;
    --color-warning: #e74c3c;
    --color-info: #3498db;
    --color-text-main: #2c3e50;
    --color-text-muted: #7f8c8d;
    --color-bg-body: #f4f7f6;
    --color-surface: #ffffff;
    
    /* Типографика */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Montserrat', sans-serif;
    
    /* Размеры и отступы */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Эффекты */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 8px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 15px 30px rgba(0,0,0,0.15);
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 2rem;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::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: 1.6;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Ссылки */
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover, a:focus {
    color: var(--color-accent);
}

/* Изображения */
img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

/* =========================================
   2. Layout & Container
   ========================================= */
.container {
    width: 100%;
    max-width: 75rem; /* ~1200px */
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

#page.site {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Основная сетка контента */
.site-content {
    display: grid;
    grid-template-columns: 1fr 20rem; /* Основной контент + Сайдбар */
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    animation: fadeIn 0.8s ease-out;
}

/* =========================================
   3. Typography
   ========================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
    font-weight: 700;
}

h1.entry-title {
    font-size: clamp(1.8rem, 4vw, 3rem);
    text-align: center;
    position: relative;
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

h1.entry-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
    margin: var(--spacing-xs) auto 0;
    border-radius: 2px;
}

h2 {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    border-bottom: 2px solid rgba(0,0,0,0.05);
    padding-bottom: var(--spacing-xs);
    margin-top: var(--spacing-lg);
}

h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    color: var(--color-primary-light);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-main);
}

/* =========================================
   4. Component Styles
   ========================================= */

/* Main Content Area */
.content-area {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* Separators */
.page-separator, .header-separator {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,0,0,0.1), transparent);
    margin: var(--spacing-md) 0;
}

/* Buttons (overriding inline styles where possible via !important for consistency) */
.btn-box {
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff !important;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover)) !important;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 15px rgba(124, 176, 72, 0.4);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
    position: relative;
    overflow: hidden;
    border: none;
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: 0.5s;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(124, 176, 72, 0.6);
    filter: brightness(1.05);
}

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(124, 176, 72, 0.4);
}

/* Blockquotes */
blockquote {
    position: relative;
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-md) 0;
    background: #f8f9fa;
    border-left: 5px solid var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
}

blockquote.check {
    border-left-color: var(--color-accent);
    background-color: rgba(124, 176, 72, 0.1);
}

blockquote.check::before {
    content: '✔';
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    color: var(--color-accent);
    font-size: 1.5rem;
    opacity: 0.5;
}

blockquote.warning {
    border-left-color: var(--color-warning);
    background-color: rgba(231, 76, 60, 0.1);
}

blockquote.info {
    border-left-color: var(--color-info);
    background-color: rgba(52, 152, 219, 0.1);
}

/* Lists */
ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

li {
    margin-bottom: 0.5rem;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

thead tr {
    background-color: var(--color-primary);
    color: #fff;
    text-align: left;
}

th, td {
    padding: 1rem;
    border-bottom: 1px solid #eee;
}

tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

tbody tr:hover {
    background-color: rgba(124, 176, 72, 0.05);
}

/* =========================================
   5. Sidebar (Secondary)
   ========================================= */
#secondary {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.widget {
    background: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

.widget:hover {
    transform: translateY(-5px);
}

.widget-header {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 0.5rem;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

/* =========================================
   6. Footer
   ========================================= */
.site-footer {
    background-color: var(--color-primary);
    color: rgba(255, 255, 255, 0.8);
    margin-top: auto;
    padding: var(--spacing-lg) 0;
}

.footer-navigation {
    background-color: var(--color-primary-light);
    padding: var(--spacing-sm) 0;
}

.main-navigation-inner ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.main-navigation-inner a {
    color: #fff;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
}

.main-navigation-inner a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-accent);
}

.footer-bottom {
    text-align: center;
    font-size: 0.9rem;
    margin-top: var(--spacing-md);
}

/* =========================================
   7. Scroll to Top Button
   ========================================= */
.scrolltop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    background-color: var(--color-accent);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    opacity: 0.8;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.scrolltop::before {
    content: '↑';
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.scrolltop:hover {
    background-color: var(--color-primary);
    transform: scale(1.1);
    opacity: 1;
}

/* =========================================
   8. Animation Keyframes
   ========================================= */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================================
   9. Media Queries (Responsive)
   ========================================= */
@media screen and (max-width: 992px) {
    .site-content {
        grid-template-columns: 1fr; /* Stack sidebar below content */
        gap: var(--spacing-md);
    }

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

@media screen and (max-width: 768px) {
    html {
        font-size: 14px; /* Slightly smaller base text */
    }

    .container {
        padding: 0 var(--spacing-xs);
    }

    .content-area, .widget {
        padding: var(--spacing-sm);
    }

    .btn {
        width: 100%; /* Full width buttons on mobile */
        padding: 0.8rem 1rem;
    }

    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    h1.entry-title {
        margin-top: var(--spacing-sm);
    }
    
    .scrolltop {
        bottom: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
    }
}

/* Print Styles */
@media print {
    .site-footer, .scrolltop, #secondary, .btn-box {
        display: none;
    }
    body {
        background: #fff;
        color: #000;
    }
    a {
        text-decoration: underline;
        color: #000;
    }
}