:root {
    --bg: #ffffff;
    --card: #ffffff;
    --muted: #6b7280;
    --text: #111827;
    --border: #e5e7eb;
    --accent: #2563eb;
    --danger: #dc2626;
    --ok: #16a34a;
}

* {
    box-sizing: border-box
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    line-height: 1.45
}

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

a:hover {
    text-decoration: underline
}

.wrap {
    max-width: 980px;
    margin: 0 auto;
    padding: 20px
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 2px
}

.brand h1 {
    font-size: 18px;
    margin: 0
}

.brand p {
    margin: 0;
    color: var(--muted);
    font-size: 13px
}

nav {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: flex-end
}

nav a {
    font-size: 13px;
    color: var(--muted)
}

nav a.active {
    color: var(--text);
    font-weight: 600
}

.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px
}

@media (min-width:860px) {
    .grid {
        grid-template-columns: 1.15fr .85fr
    }
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px
}

.card h2 {
    margin: 0 0 10px 0;
    font-size: 16px
}

.card p {
    margin: 0 0 10px 0;
    color: var(--muted);
    font-size: 13px
}

.form {
    display: grid;
    gap: 12px
}

.row {
    display: grid;
    gap: 10px;
    align-items: start
}

@media(min-width:560px) {
    .row {
        grid-template-columns: 1fr 1fr
    }
}

label {
    display: block;
    font-size: 12px;
    color: var(--muted);
    margin: 0 0 6px 0
}

select,
input {
    width: 100%;
    padding: 11px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #f9fafb;
    color: var(--text);
    outline: none
}

select:focus,
input:focus {
    border-color: var(--accent)
}

.hint {
    font-size: 12px;
    color: var(--muted);
    margin-top: 4px
}

.btn {
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid #111827;
    background: #111827;
    color: #ffffff;
    font-weight: 600;
    cursor: pointer
}

.btn:hover {
    border-color: var(--accent)
}

.result {
    border-radius: 14px;
    padding: 14px;
    border: 1px solid var(--border);
    background: #f9fafb
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    color: var(--muted);
    margin-bottom: 10px
}

.badge.ok {
    border-color: rgba(22, 163, 74, .35);
    color: var(--ok)
}

.badge.no {
    border-color: rgba(220, 38, 38, .35);
    color: var(--danger)
}

.big {
    font-size: 16px;
    margin: 0 0 6px 0
}

.explain {
    margin: 0;
    color: var(--muted);
    font-size: 13px
}

.mini {
    font-size: 12px;
    color: var(--muted)
}

.foot {
    margin-top: 18px;
    color: var(--muted);
    font-size: 12px
}

.ads {
    border: 1px dashed rgba(107, 114, 128, .4);
    border-radius: 12px;
    padding: 12px;
    color: var(--muted);
    font-size: 12px;
    background: #f9fafb
}

.ads strong {
    color: var(--text)
}

.k {
    display: inline-block;
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 12px
}

ul {
    margin: 8px 0 0 18px;
    color: var(--muted)
}

li {
    margin: 6px 0
}

.legal h2 {
    margin-top: 0
}

.legal h3 {
    margin: 18px 0 8px 0
}

.legal p {
    color: var(--muted)
}

.sep {
    height: 1px;
    background: var(--border);
    margin: 14px 0
}

/* Ad slots */
.ad-slot {
    margin: 16px 0;
}

.is-off { display: none !important; }

.sponsor-slot {
    background: #fffbe6;
    border: 1px solid #ffe58f;
    border-radius: 8px;
    padding: 12px 16px;
    margin: 10px 0 16px;
    font-size: 0.9rem;
    cursor: pointer;
}

/* Sponsor zones */
.sponsor-banner {
    background: #fffbe6;
    border: 1px solid #ffe58f;
    border-radius: 8px;
    padding: 12px 16px;
    margin-top: 10px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sponsor-sidebar {
    background: #fffbe6;
    border: 1px solid #ffe58f;
    border-radius: 8px;
    padding: 12px;
    margin-top: 16px;
    font-size: 0.85rem;
}

.sponsor-label {
    font-size: 0.7rem;
    background: rgba(255, 220, 100, 0.2);
    border-radius: 4px;
    padding: 2px 6px;
    font-weight: 700;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--muted);
}

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

.related-tools a:hover {
    text-decoration: underline;
}

/* Content sections (AdSense content depth) */
.calculator-explanation {
    background: #fff;
    border-radius: 12px;
    padding: 24px 28px;
    margin-top: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border: 1px solid var(--border);
    line-height: 1.7;
}

.calculator-explanation h2 {
    margin: 0 0 14px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}

.calculator-explanation h3 {
    margin: 18px 0 6px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
}

.calculator-explanation p {
    margin: 0 0 12px;
    color: var(--muted);
    font-size: 0.92rem;
}

.calculator-explanation ul,
.calculator-explanation ol {
    margin: 0 0 12px;
    padding-left: 22px;
    color: var(--muted);
    font-size: 0.92rem;
}

.calculator-explanation li {
    margin-bottom: 6px;
}

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

.calculator-explanation a:hover {
    text-decoration: underline;
}