/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0d47a1;
    --primary-dark: #1565c0;
    --primary-light: #1976d2;
    --secondary-color: #00acc1;
    --accent-color: #ff6f00;
    --text-color: #212121;
    --text-light: #757575;
    --text-white: #ffffff;
    --bg-color: #ffffff;
    --bg-light: #f5f7fa;
    --bg-dark: #0a1929;
    --bg-header: #0d47a1;
    --border-color: #e0e0e0;
    --border-dark: #bdbdbd;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    line-height: 1.6;
    direction: ltr;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

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

/* Header */
.header {
    position: relative;
    color: white;
    padding: 3rem 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    min-height: 200px;
    display: flex;
    align-items: center;
}

.header-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.header-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.4);
}

.header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(13, 71, 161, 0.9) 0%, rgba(21, 101, 192, 0.8) 100%);
    z-index: 1;
}

.header-content {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.logo-image {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    border: 3px solid rgba(255, 255, 255, 0.3);
}

.logo-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.logo-text h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.logo-text p {
    font-size: 0.95rem;
    opacity: 0.95;
    font-weight: 400;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.2);
}

/* Main Download Section */
.download-main {
    padding: 4rem 0;
    min-height: calc(100vh - 200px);
}

.download-container {
    max-width: 900px;
    margin: 0 auto;
}

.download-card {
    background: white;
    border-radius: 24px;
    padding: 0;
    box-shadow: var(--shadow-xl);
    text-align: center;
    margin-bottom: 3rem;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.download-hero-image {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.download-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7);
}

.download-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 2;
}

.download-card-content {
    padding: 3rem;
}

.download-icon {
    margin: -50px auto 2rem;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 3;
    background: white;
    border-radius: 50%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    padding: 10px;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
    padding: 0 2rem;
}

.download-subtitle {
    font-size: 1.15rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    font-weight: 400;
    padding: 0 2rem;
}

.file-info {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 0 2rem 2rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    text-align: left;
}

.file-detail {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.file-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
}

.file-value {
    font-size: 1rem;
    color: var(--text-color);
    font-weight: 600;
}

.download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0 2rem;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-download svg {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(13, 71, 161, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(13, 71, 161, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.download-progress {
    margin: 2rem 2rem 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-light);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border-radius: 10px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Features Section */
.features-section {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-lg);
}

.features-section h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-color);
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
    border-radius: 12px;
    transition: var(--transition);
    background: var(--bg-light);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    background: white;
}

.feature-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feature-item:hover .feature-icon {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.feature-item h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* Requirements Section */
.requirements-section {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-lg);
}

.requirements-section h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-color);
    text-align: center;
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.requirement-item {
    padding: 1.25rem;
    background: var(--bg-light);
    border-radius: 10px;
    border-left: 4px solid var(--primary-color);
}

.requirement-item strong {
    display: block;
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.requirement-item p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* Screenshots Section */
.screenshots-section {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    box-shadow: var(--shadow-lg);
}

.screenshots-section h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-color);
    text-align: center;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.screenshot-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    cursor: pointer;
}

.screenshot-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.screenshot-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(13, 71, 161, 0.9) 0%, rgba(21, 101, 192, 0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
}

.screenshot-overlay span {
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.screenshot-item:hover .screenshot-overlay {
    opacity: 1;
}

.screenshot-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    transition: var(--transition);
}

.screenshot-item:hover img {
    transform: scale(1.1);
}

.screenshot-item p {
    padding: 1.25rem;
    text-align: center;
    font-weight: 600;
    color: var(--text-color);
    background: var(--bg-light);
    margin: 0;
    font-size: 1rem;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #0d1b2a 100%);
    color: white;
    padding: 4rem 0 2rem;
    margin-top: 5rem;
    border-top: 3px solid var(--primary-color);
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

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

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

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        min-height: 150px;
        padding: 2rem 0;
    }

    .logo {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .logo-image {
        width: 60px;
        height: 60px;
    }

    .download-hero-image {
        height: 200px;
    }

    .download-icon {
        margin: -40px auto 1.5rem;
        width: 80px;
        height: 80px;
    }

    .download-title {
        font-size: 2rem;
        padding: 0 1rem;
    }

    .download-subtitle {
        padding: 0 1rem;
    }

    .file-info {
        grid-template-columns: 1fr;
        margin: 0 1rem 2rem;
    }

    .download-buttons {
        flex-direction: column;
        padding: 0 1rem;
    }

    .btn-download {
        width: 100%;
        justify-content: center;
    }

    .download-progress {
        margin: 2rem 1rem 0;
    }

    .features-grid,
    .requirements-grid,
    .screenshots-grid {
        grid-template-columns: 1fr;
    }

    .features-section,
    .requirements-section,
    .screenshots-section {
        padding: 2rem 1.5rem;
    }

    .feature-icon {
        width: 100px;
        height: 100px;
    }

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

@media (max-width: 480px) {
    .download-card {
        padding: 1.5rem 1rem;
    }

    .download-title {
        font-size: 1.75rem;
    }

    .download-subtitle {
        font-size: 1rem;
    }
}

/* Articles, Experiences, Solutions Pages */
.articles-main,
.experiences-main,
.solutions-main {
    padding: 3rem 0;
    min-height: calc(100vh - 200px);
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.page-header p {
    font-size: 1.15rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.article-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.article-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.article-card:hover .article-image img {
    transform: scale(1.1);
}

.article-content {
    padding: 1.5rem;
}

.article-category {
    display: inline-block;
    background: var(--primary-light);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.article-content h2 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.article-content h2 a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.article-content h2 a:hover {
    color: var(--primary-color);
}

.article-excerpt {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-light);
    flex-wrap: wrap;
}

/* Experiences List */
.experiences-list {
    max-width: 900px;
    margin: 0 auto;
}

.experience-card {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.experience-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.experience-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-light);
}

.experience-author h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-color);
}

.experience-author span {
    font-size: 0.85rem;
    color: var(--text-light);
}

.experience-date {
    font-size: 0.9rem;
    color: var(--text-light);
}

.experience-card h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.3;
}

.experience-content {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.experience-content ul,
.experience-content ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

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

.experience-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.experience-tags span {
    background: var(--bg-light);
    color: var(--primary-color);
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Solutions List */
.solutions-categories {
    margin-bottom: 2rem;
}

.category-tabs {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 25px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.solutions-list {
    max-width: 900px;
    margin: 0 auto;
}

.solution-card {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.solution-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.solution-category {
    background: var(--primary-light);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.solution-difficulty {
    background: var(--bg-light);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.solution-card h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    line-height: 1.3;
}

.solution-content {
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.solution-content ol,
.solution-content ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.solution-content li {
    margin-bottom: 0.75rem;
}

.solution-content strong {
    color: var(--primary-color);
    font-weight: 600;
}

.solution-meta {
    display: flex;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-light);
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Navigation */
.nav {
    display: flex;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.95rem;
}

.nav a:hover,
.nav a.active {
    background: rgba(255, 255, 255, 0.2);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.download-card,
.features-section,
.requirements-section,
.screenshots-section,
.article-card,
.experience-card,
.solution-card {
    animation: fadeIn 0.6s ease-out;
}

/* 404 Error Page */
.error-main {
    padding: 4rem 0;
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
}

.error-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 3rem 2rem;
}

.error-icon {
    margin: 0 auto 2rem;
    width: 120px;
    height: 120px;
    color: var(--primary-color);
}

.error-content h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.error-message {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    line-height: 1.6;
}

.error-suggestions {
    margin: 3rem 0;
    text-align: left;
}

.error-suggestions h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text-color);
}

.suggestions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.suggestion-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    text-decoration: none;
    color: var(--text-color);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-align: center;
}

.suggestion-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.suggestion-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.suggestion-card p {
    font-size: 0.9rem;
    color: var(--text-light);
}

.error-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin: 2rem 0;
}

.error-search {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
}

.error-search h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.search-form {
    display: flex;
    gap: 0.5rem;
    max-width: 500px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-btn {
    padding: 0.875rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-dark);
}

/* Core Web Vitals Optimizations */
img {
    loading: lazy;
    decoding: async;
}

/* Preload critical resources */
.header-background img,
.download-hero-image img {
    fetchpriority: high;
}

/* Reduce layout shift */
.logo-image,
.download-icon,
.feature-icon {
    aspect-ratio: 1;
}

/* Performance optimizations */
* {
    will-change: auto;
}

/* Responsive for new pages */
@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }

    .experience-card,
    .solution-card {
        padding: 1.5rem;
    }

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .category-tabs {
        justify-content: flex-start;
    }

    .tab-btn {
        font-size: 0.85rem;
        padding: 0.625rem 1.25rem;
    }

    .nav {
        display: none;
    }

    .error-content h1 {
        font-size: 2rem;
    }

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

    .search-form {
        flex-direction: column;
    }

    .search-btn {
        width: 100%;
    }
}