:root {
    --bg: #f8fafc;
    --surface: #ffffff;
    --surface-soft: #eef6ff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #dbe3ef;
    --accent: #1d4ed8;
    --accent-dark: #1e40af;
    --success: #047857;
    --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

a {
    color: inherit;
}

.container {
    width: min(1280px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--border);
    z-index: 10;
    backdrop-filter: blur(14px);
}

.header-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: white;
    background: var(--accent);
    font-weight: 800;
    font-size: 24px;
}

.brand strong,
.brand small {
    display: block;
}

.brand small {
    color: var(--muted);
    font-size: 13px;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 14px;
}

.nav a {
    text-decoration: none;
    color: var(--muted);
    font-weight: 700;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.lang-switcher a {
    text-decoration: none;
    color: var(--muted);
    border: 1px solid var(--border);
    background: white;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 700;
}

.lang-switcher a.is-active {
    color: white;
    background: var(--accent);
    border-color: var(--accent);
}

.top-ad-wrap .ad-slot {
    margin: 18px 0 0;
}

.hero {
    padding: 72px 0 36px;
    background:
        radial-gradient(circle at top left, rgba(29, 78, 216, 0.18), transparent 35%),
        linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.eyebrow,
.section-kicker {
    color: var(--accent);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 13px;
}

h1 {
    margin: 0;
    font-size: clamp(36px, 6vw, 64px);
    line-height: 1.02;
    max-width: 820px;
}

h2 {
    margin-top: 0;
    font-size: clamp(26px, 4vw, 36px);
    line-height: 1.15;
}

h3 {
    margin-top: 0;
}

.hero-copy {
    max-width: 680px;
    font-size: 19px;
    color: var(--muted);
}

.keyword-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.keyword-row span {
    border: 1px solid var(--border);
    background: white;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--muted);
}

.calculator-card,
.mini-card,
.article,
.content-card,
.faq details {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.calculator-card,
.mini-card,
.article,
.content-card {
    padding: 28px;
}

.section {
    padding: 48px 0;
}

.section-muted {
    background: #eef3f9;
}

.section-header {
    margin-bottom: 20px;
}

.section-kicker {
    margin-bottom: 8px;
}

.salary-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 800;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.field-control {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: white;
    padding: 15px 16px;
    font-size: 16px;
    color: var(--text);
}

.input-row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    background: white;
}

.input-row span {
    padding: 15px 18px;
    background: #f1f5f9;
    color: var(--muted);
    font-weight: 800;
}

.input-row input {
    border: 0;
    padding: 15px 16px;
    font-size: 18px;
    min-width: 0;
}

.input-row button,
.primary-button {
    border: 0;
    cursor: pointer;
    font-weight: 800;
}

.form-actions {
    margin-top: 20px;
}

.primary-button {
    padding: 14px 24px;
    color: white;
    background: var(--accent);
    border-radius: 16px;
}

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

.result-panel {
    overflow: hidden;
    border-radius: 22px;
    border: 1px solid var(--border);
}

.result-main {
    padding: 24px;
    background: #ecfdf5;
}

.result-main span,
.result-main strong {
    display: block;
}

.result-main strong {
    margin-top: 6px;
    font-size: clamp(34px, 6vw, 52px);
    line-height: 1;
    color: var(--success);
}

.result-main small {
    display: block;
    margin-top: 8px;
    color: var(--muted);
    font-size: 14px;
}

.breakdown {
    display: grid;
}

.breakdown div {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 14px 18px;
    border-top: 1px solid var(--border);
}

.breakdown span {
    color: var(--muted);
}

.breakdown .total {
    background: #f8fafc;
}

.breakdown .take-home-row {
    background: #eff6ff;
}

.breakdown .take-home-row strong {
    color: var(--success);
}

.tax-explanation-card {
    margin-top: 22px;
    padding: 24px;
    background: #f8fbff;
    border: 1px solid var(--border);
    border-radius: 22px;
}

.tax-explanation-card h3 {
    margin-bottom: 10px;
}

.tax-explanation-card p {
    color: var(--muted);
}

.tax-steps {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.tax-steps div {
    padding: 16px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 16px;
}

.tax-steps span,
.tax-steps strong {
    display: block;
}

.tax-steps span {
    color: var(--muted);
    font-size: 14px;
}

.mini-card ul {
    padding-left: 20px;
    margin-bottom: 0;
}

.assumption-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.assumption-grid div {
    padding: 18px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 18px;
}

.assumption-grid p,
.faq p,
.content-card p {
    margin-bottom: 0;
    color: var(--muted);
}

.article {
    max-width: 860px;
}

.faq {
    display: grid;
    gap: 14px;
}

.faq details {
    padding: 18px 22px;
}

.faq summary {
    cursor: pointer;
    font-weight: 800;
}

.rail-sticky {
    position: sticky;
    top: 118px;
}

.ad-slot {
    margin: 24px 0;
    border-radius: 18px;
    overflow: hidden;
}

.ad-slot--placeholder {
    min-height: 96px;
    border: 1px dashed #94a3b8;
    color: #64748b;
    background: #f8fafc;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 18px;
}

.ad-slot--placeholder span,
.ad-slot--placeholder small {
    display: block;
}

.ad-slot--placeholder span {
    font-weight: 800;
}

.rail-sticky .ad-slot--placeholder {
    min-height: 600px;
}

.site-footer {
    padding: 32px 0;
    color: var(--muted);
    text-align: center;
}

@media (max-width: 1199.98px) {
    .rail-sticky {
        position: static;
    }

    .rail-sticky .ad-slot--placeholder {
        min-height: 140px;
    }
}

@media (max-width: 860px) {
    .header-grid,
    .nav {
        align-items: flex-start;
    }

    .header-grid {
        flex-direction: column;
    }

    .lang-switcher {
        margin-left: 0;
    }

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

    .tax-steps {
        grid-template-columns: 1fr;
    }

    .input-row {
        grid-template-columns: auto 1fr;
    }

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