/* --- Global Styles & Variables --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

:root {
    --primary-color: #007BFF;
    --dark-color: #212121;
    --light-color: #FFFFFF;
    --grey-light: #F5F5F5;
    --grey-medium: #E0E0E0;
    --grey-dark: #757575;
    --font-family: 'Inter', sans-serif;
    --container-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
    font-size: 16px;
}

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

a:hover {
    color: #0056b3;
    text-decoration: underline;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

p {
    margin-bottom: 1rem;
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--light-color);
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #0056b3;
    text-decoration: none;
    color: var(--light-color);
}

/* --- Header & Navigation --- */
.site-header {
    background-color: var(--light-color);
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--grey-medium);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.site-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark-color);
}

.site-title a {
    color: inherit;
}

.site-title a:hover {
    text-decoration: none;
}

.main-nav ul {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.main-nav a {
    font-weight: 600;
    color: var(--dark-color);
    padding: 0.5rem 0;
    position: relative;
}

.main-nav a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.main-nav a:hover::after {
    width: 100%;
}


/* --- Main Content & Layout --- */
.main-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem 0;
}

.main-content {
    background-color: var(--light-color);
}

/* --- Homepage Specific --- */
.hero {
    text-align: center;
    padding: 3rem 0;
    background-color: var(--grey-light);
    border-radius: 8px;
    margin-bottom: 2rem;
}

.hero h1 {
    margin-bottom: 0.5rem;
}

.hero p {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--grey-dark);
}

.intro-section {
    padding: 2rem;
    background-color: var(--light-color);
    margin-bottom: 2rem;
    border: 1px solid var(--grey-medium);
    border-radius: 8px;
}

.blog-section {
    padding: 2rem 0;
}

.blog-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.blog-card {
    border: 1px solid var(--grey-medium);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.blog-card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.blog-card h3 {
    margin-top: 0;
    font-size: 1.3rem;
}

.blog-card p {
    color: var(--grey-dark);
    flex-grow: 1;
}

.blog-card .btn {
    align-self: flex-start;
}

/* --- Article Page --- */
.article-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--grey-medium);
}
.article-header h1 {
    font-size: 2.8rem;
}

.article-header .meta {
    color: var(--grey-dark);
    font-size: 0.9rem;
}

.article-content section {
    margin-bottom: 2rem;
}

.article-content ul, .article-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.article-content ul li {
    list-style-type: disc;
    margin-bottom: 0.5rem;
}

.article-content ol li {
    list-style-type: decimal;
    margin-bottom: 0.5rem;
}

.cta {
    background-color: var(--grey-light);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--grey-medium);
}

/* --- Sidebar --- */
.sidebar .widget {
    background-color: var(--grey-light);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.sidebar .widget h3 {
    margin-top: 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--grey-medium);
}

.sidebar .widget ul li {
    margin-bottom: 0.75rem;
}
.sidebar .widget ul li a {
    font-weight: 600;
}

/* --- Simple Page Layout --- */
.simple-page {
    padding: 3rem 0;
}

.simple-page .container {
    max-width: 900px;
}

.simple-page h1 {
    text-align: center;
    margin-bottom: 2rem;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: 2rem 0;
    margin-top: 2rem;
    text-align: center;
}

.site-footer p {
    margin: 0;
}

/* --- Media Queries --- */
@media (min-width: 600px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .main-layout {
        grid-template-columns: 2.5fr 1fr;
    }
    .blog-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: 1rem;
    }
    .main-nav ul {
        justify-content: center;
    }
    h1 { font-size: 2rem; }
    .article-header h1 { font-size: 2.2rem; }
}