/* --- AI / Modern Theme --- */
/* Font: Inter */
/* Tone: Informative & Straightforward */

:root {
    --bg-color: #1a1a2e;
    --primary-color: #1f2937;
    --secondary-color: #2c3e50;
    --accent-color: #3b82f6;
    --text-color: #e0e0e0;
    --text-muted-color: #a0a0a0;
    --border-color: #4a4a6a;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* --- Header & Navigation --- */
header {
    background-color: var(--primary-color);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

header h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

header h1 a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s;
}

header h1 a:hover {
    color: var(--accent-color);
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
}

nav ul li a {
    color: var(--text-muted-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: block;
    transition: color 0.3s, background-color 0.3s;
    border-radius: 4px;
}

nav ul li a:hover, nav ul li a.active {
    color: var(--text-color);
    background-color: var(--secondary-color);
}


/* --- Main Content Layout --- */
main {
    padding: 2rem 0;
}

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

/* --- Article & Sidebar --- */
article {
    background-color: var(--primary-color);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

article h1, article h2, article h3 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

article h1 {
    font-size: 2.5rem;
    line-height: 1.2;
}

article h2 {
    font-size: 1.8rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
    margin-top: 2rem;
}

article h3 {
    font-size: 1.4rem;
    color: var(--accent-color);
    margin-top: 1.5rem;
}

article p {
    margin-bottom: 1rem;
    color: var(--text-muted-color);
}

article a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
    transition: text-decoration 0.3s;
}

article a:hover {
    text-decoration: underline;
}

article ul, article ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-muted-color);
}

.article-meta {
    margin-bottom: 1.5rem;
    color: var(--text-muted-color);
    font-size: 0.9rem;
}

.article-meta span {
    margin-right: 1rem;
}

.cta-section {
    background-color: var(--secondary-color);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 2rem;
    text-align: center;
    border-left: 4px solid var(--accent-color);
}

aside {
    background-color: var(--primary-color);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

aside h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
}

aside ul {
    list-style: none;
}

aside ul li a {
    color: var(--text-muted-color);
    text-decoration: none;
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: color 0.3s;
}

aside ul li a:hover {
    color: var(--accent-color);
}

.promo-text {
    background-color: var(--secondary-color);
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1.5rem;
    font-style: italic;
    color: var(--text-color);
    text-align: center;
}

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

.blog-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.blog-card {
    background-color: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.blog-card-content {
    padding: 1.5rem;
}

.blog-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.blog-card h3 a {
    color: var(--text-color);
    text-decoration: none;
}

.blog-card p {
    color: var(--text-muted-color);
    margin-bottom: 1rem;
}

.read-more {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
}

.read-more:hover {
    background-color: #2563eb;
}

/* --- Form styles for Contact Page --- */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

button[type="submit"] {
    background-color: var(--accent-color);
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s;
}

button[type="submit"]:hover {
    background-color: #2563eb;
}


/* --- Footer --- */
footer {
    background-color: var(--primary-color);
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted-color);
}

/* --- Responsive Design --- */
@media (min-width: 768px) {
    .main-content {
        grid-template-columns: 2fr 1fr;
    }

    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .main-content {
        grid-template-columns: 3fr 1fr;
    }

    .blog-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}