:root {
    --primary: #059669;
    --primary-dark: #047857;
    --primary-light: #10b981;
    --secondary: #1e293b;
    --secondary-light: #334155;
    --accent: #f59e0b;
    --light: #f8fafc;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
    --shadow-premium: 0 20px 50px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg-main);
    color: var(--text);
    line-height: 1.6;
}

header {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.menu-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    color: var(--secondary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav-links a:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-links .btn-sm {
    color: white !important;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lang-selector {
    display: flex;
    align-items: center;
    margin-left: 10px;
}

.lang-btn {
    background: none;
    border: 2px solid transparent;
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.lang-btn.lang-active {
    border-color: var(--primary);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white !important;
    box-shadow: 0 4px 15px rgba(5, 150, 105, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(5, 150, 105, 0.4);
}

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

.btn-secondary:hover {
    background: var(--light);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

footer {
    background: var(--secondary);
    color: white;
    padding: 3rem 2rem 2rem;
    margin-top: 4rem;
}

.footer-links {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
}

.footer-links a:hover {
    color: white;
    text-decoration: underline;
}

main {
    min-height: calc(100vh - 200px);
}

section {
    padding: 4rem 2rem;
}

.section-heading {
    text-align: center;
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 3rem;
    font-family: 'Outfit', sans-serif;
}

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border);
}

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

.animate-in {
    animation: fadeIn 0.6s ease-out;
}

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

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    nav {
        flex-wrap: wrap;
    }
}

/* Problems List */
.section-problems {
    padding: 4rem 2rem;
    background: white;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.problem-card {
    display: block;
    text-decoration: none;
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.problem-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.problem-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.problem-severity {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-top: 0.5rem;
}

.severity-1 { background: #dcfce7; color: #166534; }
.severity-2 { background: #fef3c7; color: #92400e; }
.severity-3 { background: #fee2e2; color: #991b1b; }

/* Steps/How it works */
.section-how {
    background: var(--light);
    padding: 4rem 2rem;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.step-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 800;
    line-height: 50px;
    margin-bottom: 1rem;
}

/* Tools grid */
.section-tools {
    padding: 4rem 2rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tool-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text);
    transition: var(--transition);
}

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

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Blog List */
.section-articles {
    padding: 4rem 2rem;
}

.blog-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.post-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    overflow: hidden;
}

.post-image-container {
    height: 200px;
    overflow: hidden;
}

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

.post-content {
    padding: 1.5rem;
}

.post-content h2 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

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

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

.post-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--light);
    border-radius: 20px;
    margin-left: 0.5rem;
    font-size: 0.75rem;
}

.read-more {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

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

/* Resources Section */
.section-resources {
    padding: 4rem 2rem;
    background: var(--bg-main);
}

.section-resources .container {
    max-width: 1200px;
    margin: 0 auto;
}

.resource-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border);
    text-align: center;
}

.resource-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.resource-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.resource-card h3 {
    color: var(--secondary);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.resource-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Related Grid */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}