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

:root {
    --primary-color: #ff6b35;
    --secondary-color: #004e89;
    --dark-bg: #1a1a1a;
    --light-bg: #f5f5f5;
    --text-dark: #333;
    --text-light: #666;
    --white: #ffffff;
    --border-color: #e0e0e0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #0066b3 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

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

.logo h1 {
    color: var(--white);
    font-size: 1.8rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-menu a:hover,
.nav-menu a.active {
    background-color: rgba(255,255,255,0.2);
    opacity: 1;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--white);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #ff8c5a 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.95;
}

/* Promo Banner */
.promo-banner {
    background: linear-gradient(135deg, #ff6b35 0%, #ff8c5a 50%, #ff6b35 100%);
    background-size: 200% 200%;
    animation: gradientShift 3s ease infinite;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
    position: relative;
    overflow: hidden;
}

.promo-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.promo-banner-content {
    position: relative;
    z-index: 1;
}

.promo-banner h3 {
    color: var(--white);
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.promo-banner p {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.promo-banner-btn {
    display: inline-block;
    background: var(--white);
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.promo-banner-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
    background: #fff;
    color: #ff5722;
}

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

/* Sidebar Banner */
.sidebar-banner {
    background: linear-gradient(135deg, var(--primary-color) 0%, #ff8c5a 100%);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    margin: 2rem 0;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
    position: sticky;
    top: 100px;
}

.sidebar-banner h4 {
    color: var(--white);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.sidebar-banner .promo-banner-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}

/* Articles Grid */
.featured-articles,
.all-articles {
    padding: 3rem 0;
}

.featured-articles {
    background-color: var(--light-bg);
}

.featured-articles h2,
.all-articles h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--secondary-color);
    text-align: center;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.article-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.2);
}

.article-card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 3rem;
}

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

.article-card h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.article-card-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.article-card-excerpt {
    color: var(--text-dark);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
}

.read-more:hover {
    text-decoration: underline;
}

/* Articles List */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.article-item {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.5rem;
    transition: box-shadow 0.3s;
    cursor: pointer;
}

.article-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.article-item h3 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: 1.4rem;
}

.article-item-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.article-item-excerpt {
    color: var(--text-dark);
    line-height: 1.6;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.pagination button {
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--border-color);
    background: var(--white);
    color: var(--text-dark);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1rem;
}

.pagination button:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.pagination button.active {
    background: var(--secondary-color);
    color: var(--white);
    border-color: var(--secondary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Article Detail Page */
.article-detail {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
}

.article-detail-main {
    max-width: 900px;
}

@media (max-width: 968px) {
    .article-detail {
        grid-template-columns: 1fr;
    }
    
    .sidebar-banner {
        position: static !important;
    }
}

.article-detail-header {
    margin-bottom: 2rem;
}

.article-detail h1 {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.article-detail-meta {
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.article-detail-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.article-detail-content h2 {
    color: var(--secondary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.article-detail-content h3 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.4rem;
}

.article-detail-content p {
    margin-bottom: 1rem;
}

.article-detail-content ul,
.article-detail-content ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.article-detail-content li {
    margin-bottom: 0.5rem;
}

.back-button {
    display: inline-block;
    margin-bottom: 2rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    transition: all 0.3s;
}

.back-button:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-section a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.7;
}

/* Page Content Styles */
.page-content {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 20px;
}

.page-content h1 {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.page-content h2 {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.page-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.page-content ul,
.page-content ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.page-content li {
    margin-bottom: 0.5rem;
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--light-bg);
    border-radius: 10px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #ff5722;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--secondary-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero h2 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .article-detail h1 {
        font-size: 1.8rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .promo-banner h3 {
        font-size: 1.4rem;
    }

    .promo-banner p {
        font-size: 1rem;
    }

    .promo-banner-btn {
        padding: 0.85rem 2rem;
        font-size: 1rem;
    }
}