:root {
    --text-color: #192026;
    --accent-color: #215cff;
    --muted-color: #5f6b76;
    --border-color: #e3e8ef;
    --bg-color: #f7f9fc;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: inherit;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: min(1100px, 90%);
    margin: 0 auto;
    padding: 2rem 0;
}

.site-header,
.site-footer {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-footer {
    border-top: 1px solid var(--border-color);
    border-bottom: none;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
}

.language-switcher {
    position: relative;
    margin-left: auto;
}

.language-dropdown {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.language-toggle {
    position: absolute;
    opacity: 0;
    visibility: hidden;
    width: 0;
    height: 0;
    margin: 0;
    padding: 0;
    border: 0;
    appearance: none;
    pointer-events: none;
}

.language-trigger {
    border: 1px solid var(--border-color);
    background: #fff;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    font-size: 0.85rem;
    color: var(--text-color);
    cursor: pointer;
    user-select: none;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.language-flag {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.08);
    display: inline-block;
}

.language-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 0.4rem);
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
    padding: 0.5rem;
    min-width: 160px;
    display: none;
    z-index: 20;
}

.language-dropdown:hover .language-menu,
.language-dropdown:focus-within .language-menu,
.language-toggle:checked + .language-trigger + .language-menu {
    display: block;
}

.language-menu a {
    display: block;
    padding: 0.45rem 0.6rem;
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-menu a.active,
.language-menu a:hover {
    background: var(--bg-color);
    color: var(--accent-color);
    text-decoration: none;
}

.language-menu a {
    pointer-events: auto;
}

.site-nav {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
}

.site-nav .container {
    padding: 0.75rem 0;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 0;
    padding: 0;
}

.nav-list a {
    font-size: 0.9rem;
    color: var(--muted-color);
    font-weight: 600;
}

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

.breadcrumbs {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    color: var(--muted-color);
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.breadcrumbs a {
    color: var(--muted-color);
}

.breadcrumbs a:hover {
    color: var(--accent-color);
}

.calculator-meta {
    margin: 0.5rem 0 1.25rem;
    color: var(--muted-color);
    font-size: 0.95rem;
}

.calculator-meta a {
    font-weight: 600;
}

.hero {
    padding: 2rem;
    background: linear-gradient(135deg, rgba(33, 92, 255, 0.12), rgba(99, 102, 241, 0.08));
    border: 1px solid rgba(33, 92, 255, 0.12);
    border-radius: 16px;
    box-shadow: 0 15px 35px rgb(15 23 42 / 6%);
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero-search label {
    display: block;
    font-size: 0.85rem;
    color: var(--muted-color);
    margin-bottom: 0.4rem;
}

.hero-search input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
}

.search-suggestions {
    margin-top: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: #fff;
    display: none;
    max-height: 260px;
    overflow-y: auto;
}

.search-suggestions.active {
    display: block;
}

.search-suggestions a {
    display: block;
    padding: 0.6rem 0.9rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

.search-suggestions a span {
    display: block;
    font-size: 0.8rem;
    color: var(--muted-color);
}

.search-suggestions a:last-child {
    border-bottom: none;
}

.section-header {
    margin-bottom: 1rem;
}

.section-header h2 {
    margin: 0 0 0.3rem;
}

.section-header p {
    margin: 0;
    color: var(--muted-color);
}

.categories-section {
    margin-top: 2rem;
}

.categories-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.category-header h2 {
    margin: 0;
}

.category-chip {
    margin-left: auto;
    background: var(--bg-color);
    color: var(--muted-color);
    border-radius: 999px;
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
}

.category-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(99, 102, 241, 0.12);
    color: #4f46e5;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
}

.category-icon svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

.category-card,
.category,
.calculator-card,
.calculator-detail,
.about-page,
.error-page {
    background: #fff;
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 15px 35px rgb(15 23 42 / 6%);
}

.calculator-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
}

.calculator-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.calculator-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.calculator-badges {
    display: inline-flex;
    gap: 0.4rem;
    flex-shrink: 0;
}

.badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    font-weight: 600;
}

.badge-new {
    background: rgba(16, 185, 129, 0.12);
    color: #059669;
}

.badge-popular {
    background: rgba(99, 102, 241, 0.14);
    color: #4f46e5;
}

.view-all {
    display: inline-block;
    margin-top: 0.75rem;
    font-weight: 600;
    font-size: 0.9rem;
}

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

.calculator-card.compact .card-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.5rem;
}

.calculator-card.compact a {
    display: block;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.calculator-card.compact .card-meta {
    color: var(--muted-color);
    font-size: 0.85rem;
}

.cta-card {
    margin-top: 2rem;
    background: #fff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 15px 35px rgb(15 23 42 / 6%);
    text-align: center;
}

.cta-card h3 {
    margin-top: 0;
}

.cta-button {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent-color);
    color: #fff;
    border-radius: 999px;
    font-weight: 600;
}

@media (min-width: 900px) {
    .hero {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .hero-content {
        max-width: 60%;
    }

    .hero-search {
        width: 320px;
    }
}

@media (min-width: 840px) {
    .categories-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1100px) {
    .categories-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.related-calculators ul {
    list-style: none;
    padding: 0;
}

.related-calculators li {
    margin-bottom: 0.75rem;
}

.related-calculators {
    margin-top: 2rem;
    background: #fff;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 15px 35px rgb(15 23 42 / 6%);
}

.related-calculators h2 {
    margin-top: 0;
    margin-bottom: 1rem;
}

.related-calculators ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.related-calculators li {
    margin: 0;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    background: var(--bg-color);
}

.related-calculators li p {
    margin: 0.35rem 0 0;
    color: var(--muted-color);
    font-size: 0.9rem;
}

.calculator-dates {
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--muted-color);
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.calculator-dates strong {
    color: var(--text-color);
}

.calculator-dates time {
    margin-right: 0.75rem;
}