:root {
    --primary-color: #1a237e; /* Deep Navy Blue */
    --accent-color: #c62828; /* Strong Red */
    --accent-color-hover: #b71c1c;
    --background-color: #f4f6f8;
    --surface-color: #ffffff;
    --text-color: #212121;
    --text-muted-color: #616161;
    --border-color: #e0e0e0;
    --heading-font: 'Lora', serif;
    --body-font: 'Roboto', sans-serif;
    --container-width: 1200px;
    --border-radius: 3px;
    --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.07);
}

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

body {
    font-family: var(--body-font);
    line-height: 1.7;
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 17px;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-color-hover);
    text-decoration: underline;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.3;
}

/* Header */
.site-header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

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

.site-header .logo a {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--heading-font);
    color: var(--primary-color);
    text-decoration: none;
}

.site-header .main-nav ul {
    display: flex;
}

.site-header .main-nav li {
    margin-left: 40px;
}

.site-header .main-nav a {
    color: var(--text-color);
    font-weight: 700;
    font-size: 1rem;
    padding-bottom: 5px;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: color 0.3s ease, border-bottom-color 0.3s ease;
}

.site-header .main-nav a.active,
.site-header .main-nav a:hover {
    color: var(--primary-color);
    border-bottom-color: var(--accent-color);
}


/* Main Content Layout */
.page-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
    padding-top: 60px;
    padding-bottom: 60px;
}

@media (min-width: 992px) {
    .page-content {
        grid-template-columns: 2.5fr 1fr;
    }
}

/* Intro Section */
.intro {
    margin-bottom: 40px;
}
.intro h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}
.intro p {
    font-size: 1.15rem;
    color: var(--text-muted-color);
    margin-bottom: 1rem;
    max-width: 70ch;
}
.intro p a {
    font-weight: 700;
}

/* Articles Section */
.articles-section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

@media (min-width: 768px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.card-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-content h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.card-content p {
    margin-bottom: 1.5rem;
    flex-grow: 1;
    color: var(--text-muted-color);
    font-size: 1rem;
}

.btn {
    display: inline-block;
    background: var(--accent-color);
    color: #fff;
    padding: 12px 28px;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 700;
    font-family: var(--body-font);
    transition: background-color 0.2s ease, transform 0.2s ease;
    align-self: flex-start;
    text-decoration: none;
    border: none;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.btn:hover {
    background: var(--accent-color-hover);
    color: #fff;
    transform: translateY(-2px);
    text-decoration: none;
}

/* Sidebar */
.sidebar .widget {
    background: var(--surface-color);
    padding: 25px;
    margin-bottom: 30px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.sidebar .widget h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary-color);
}

.sidebar .widget-list li {
    margin-bottom: 15px;
}
.sidebar .widget-list li:last-child {
    margin-bottom: 0;
}

.sidebar .widget-list a {
    color: var(--text-color);
    font-weight: 700;
    transition: color 0.2s ease;
    display: block;
    line-height: 1.4;
}

.sidebar .widget-list a:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.promo-widget {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
}
.promo-widget h3 {
    color: #fff;
    border-bottom-color: var(--accent-color);
}
.promo-widget p {
    color: #e0e0e0;
    margin-bottom: 1.5rem;
}
.promo-widget .btn-promo {
    background-color: var(--accent-color);
    color: #fff;
    width: 100%;
}
.promo-widget .btn-promo:hover {
    background-color: var(--accent-color-hover);
}

/* Article Page */
.article-content {
    background: var(--surface-color);
    padding: 50px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}
.article-header {
    margin-bottom: 2.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
}
.article-header h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 1rem;
}
.article-meta {
    color: var(--text-muted-color);
    font-size: 0.9rem;
    font-weight: 700;
}
.article-content h2, .article-content h3 {
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
}
.article-content h2 { font-size: 1.8rem; color: #333; }
.article-content h3 { font-size: 1.5rem; color: #444; }
.article-content p, .article-content ul, .article-content ol {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-color);
}
.article-content ul, .article-content ol {
    padding-left: 30px;
}
.article-content li { margin-bottom: 0.75rem; }

.cta-section {
    background-color: var(--background-color);
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
    margin-top: 3rem;
    border: 1px solid var(--border-color);
    border-left: 5px solid var(--accent-color);
}
.cta-section h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

/* Footer */
.site-footer {
    background-color: #111;
    color: #aaa;
    text-align: center;
    padding: 3rem 0;
    margin-top: 60px;
    font-size: 0.9rem;
}

.site-footer a {
    color: #fff;
    margin: 0 15px;
    font-weight: 700;
    text-decoration: none;
}
.site-footer a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}
.site-footer .footer-links {
    margin-bottom: 1.5rem;
}

/* Static Pages (About, Contact, Offers) */
.page-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}
.page-header h1 {
    font-size: 3rem;
}
.page-content-single {
    max-width: 850px;
    margin: 0 auto;
    background-color: var(--surface-color);
    padding: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}
.page-content-single p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}
.page-content-single h2 {
    font-size: 1.8rem;
    margin-bottom: 1.25rem;
    margin-top: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}
.contact-info {
    font-size: 1.1rem;
    background: var(--background-color);
    padding: 20px 25px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-weight: 400;
}

/* Offers Page Grid */
.offers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}
.offer-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.offer-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}
.offer-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}
.offer-card p {
    color: var(--text-muted-color);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    min-height: 45px;
}

/* Responsive Styles */
@media (max-width: 991px) {
    .article-content { padding: 30px; }
    .article-header h1 { font-size: 2.4rem; }
}

@media (max-width: 767px) {
    body { font-size: 16px; }
    .site-header { padding: 1rem 0; }
    .site-header .container {
        flex-direction: column;
        gap: 1rem;
    }
    .site-header .main-nav ul {
        justify-content: center;
        width: 100%;
        flex-wrap: wrap;
    }
    .site-header .main-nav li { margin: 5px 10px; }

    .intro h1, .page-header h1 { font-size: 2.2rem; }
    .article-header h1 { font-size: 2rem; }
    .article-content { padding: 20px; }
    .articles-grid { grid-template-columns: 1fr; }
    .page-content-single { padding: 30px; }
}