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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --bg-light: #f8fafc;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* HEADER */
header {
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

/* HERO */
.hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
    padding: 4rem 0 3rem;
    text-align: center;
}

.badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* SECTIONS */
.section {
    padding: 4rem 0;
}

.section-alt {
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.section-header p {
    color: var(--text-light);
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto;
}

/* CALCULATOR */
.tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border);
}

.tab {
    background: none;
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
    position: relative;
    top: 2px;
}

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

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.calculator-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 3rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.input-group {
    margin-bottom: 2rem;
}

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

.input-group input,
.input-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
    font-family: inherit;
}

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

.btn {
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
}

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

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.result-box {
    background: var(--bg-light);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 2rem;
    text-align: center;
}

.result-label {
    font-size: 0.875rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 3rem;
    font-weight: 800;
    color: var(--success);
}

.result-note {
    margin-top: 1rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

.breakdown {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.breakdown h3 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.breakdown-row:last-child {
    border-bottom: none;
    font-weight: 600;
    font-size: 1.125rem;
    margin-top: 0.5rem;
    padding-top: 1rem;
    border-top: 2px solid var(--border);
}

/* COMPARISON TABLE */
.comparison-table {
    width: 100%;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.comparison-table thead {
    background: var(--bg-light);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
}

.comparison-table th {
    font-weight: 600;
    color: var(--text-dark);
}

.comparison-table tbody tr {
    border-bottom: 1px solid var(--border);
}

.comparison-table tbody tr:last-child {
    border-bottom: none;
}

.positive {
    color: var(--success);
    font-weight: 600;
}

.negative {
    color: var(--error);
    font-weight: 600;
}

/* CONTENT CARDS */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.content-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.content-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.1);
}

.content-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.content-card p {
    color: var(--text-light);
    line-height: 1.7;
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

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

/* NEWS */
.news-list {
    max-width: 900px;
    margin: 0 auto;
}

.news-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    background: white;
    transition: all 0.2s;
}

.news-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.news-date {
    flex-shrink: 0;
    text-align: center;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
    min-width: 80px;
}

.news-date .day {
    font-size: 2rem;
    font-weight: 700;
    display: block;
    color: var(--primary);
}

.news-date .month {
    font-size: 0.875rem;
    color: var(--text-light);
    text-transform: uppercase;
}

.news-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.news-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.news-tag {
    display: inline-block;
    background: var(--bg-light);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

/* ARTICLE */
.article {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.article-header {
    margin-bottom: 3rem;
}

.article-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.article-meta {
    color: var(--text-light);
    font-size: 0.875rem;
}

.article-content {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.article-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    color: var(--text-dark);
}

.article-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin: 2rem 0 1rem;
    color: var(--text-dark);
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

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

.article-content strong {
    color: var(--text-dark);
    font-weight: 600;
}

.info-box {
    background: #eff6ff;
    border-left: 4px solid var(--primary);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 8px;
}

.info-box h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.calculation-example {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.calculation-example h4 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.calculation-step {
    padding: 0.5rem 0;
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
}

.calculation-step:last-child {
    border-bottom: none;
    font-weight: 600;
    margin-top: 0.5rem;
    padding-top: 1rem;
    border-top: 2px solid var(--border);
}

/* FAQ */
.faq-item {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-dark);
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer.active {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem;
}

.faq-icon {
    transition: transform 0.3s;
}

.faq-icon.active {
    transform: rotate(180deg);
}

/* CONTACT FORM */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 12px;
}

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

.contact-form textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    min-height: 150px;
    resize: vertical;
}

.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* FOOTER */
footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

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

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

.footer-section a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-section p {
    color: #cbd5e1;
    line-height: 1.7;
}

.footer-bottom {
    border-top: 1px solid #475569;
    padding-top: 2rem;
    text-align: center;
    color: #94a3b8;
    font-size: 0.875rem;
}

/* COOKIE BANNER */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 12px rgba(0,0,0,0.1);
    padding: 1.5rem;
    z-index: 1000;
    display: none;
}

.cookie-banner.show {
    display: block;
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.cookie-text {
    flex: 1;
}

.cookie-text p {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.cookie-text a {
    color: var(--primary);
    text-decoration: underline;
}

.cookie-buttons {
    display: flex;
    gap: 1rem;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 0.75rem;
    }

    .mobile-menu-btn {
        display: block;
    }

    .calculator-card {
        padding: 1.5rem;
    }

    .tabs {
        flex-direction: column;
        border-bottom: none;
    }

    .tab {
        border-bottom: 1px solid var(--border);
        border-left: 3px solid transparent;
        text-align: left;
        top: 0;
    }

    .tab.active {
        border-left-color: var(--primary);
        border-bottom-color: var(--border);
        background: var(--bg-light);
    }

    .result-value {
        font-size: 2rem;
    }

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

    .news-item {
        flex-direction: column;
    }

    .news-date {
        align-self: flex-start;
    }

    .comparison-table {
        font-size: 0.875rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem 0.5rem;
    }

    .article-header h1 {
        font-size: 1.75rem;
    }

    .article-content {
        font-size: 1rem;
    }

    .cookie-content {
        flex-direction: column;
        text-align: center;
    }

    .cookie-buttons {
        width: 100%;
        flex-direction: column;
    }

    .cookie-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 2rem 0;
    }

    .calculator-card {
        padding: 1rem;
    }
}