:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --card-bg-2: #252525;
    --text-main: #e0e0e0;
    --text-muted: #a3a3a3;
    --accent: #4caf50;
    --accent-hover: #43a047;
    --accent-soft: #81c784;
    --border: #333;
    --wrap: 960px;
    --prose: 720px;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent-soft);
}

a:hover {
    color: #a5d6a7;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 8px;
    background: var(--accent);
    color: #fff;
    padding: 8px 12px;
    border-radius: 6px;
    z-index: 10;
}

.skip-link:focus {
    left: 8px;
}

.wrap {
    width: 100%;
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 16px;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--border);
    background: #161616;
}

.site-header .wrap {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 20px;
    padding-top: 14px;
    padding-bottom: 14px;
}

.brand {
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand:hover {
    color: #fff;
}

.brand img {
    width: 26px;
    height: 26px;
}

.site-nav {
    display: flex;
    gap: 18px;
}

.site-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--accent-soft);
}

main.wrap {
    flex: 1;
    padding-top: 32px;
    padding-bottom: 48px;
}

/* Hero */
.hero {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 24px;
}

.hero h1 {
    font-size: 1.9rem;
    line-height: 1.25;
    color: #fff;
    margin-bottom: 10px;
}

.hero .intro {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Calculator card */
.container {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.container h2 {
    font-size: 1.5rem;
    margin-bottom: 6px;
    text-align: center;
    color: #fff;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 24px;
}

.input-group {
    margin-bottom: 16px;
}

label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 6px;
    color: var(--text-muted);
    font-weight: 500;
}

input,
textarea {
    width: 100%;
    padding: 12px;
    background: #2a2a2a;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

textarea {
    min-height: 140px;
    resize: vertical;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.row {
    display: flex;
    gap: 12px;
}

.row .input-group {
    flex: 1;
}

button {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.2s;
}

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

.results {
    margin-top: 24px;
    border-top: 1px solid var(--border);
    padding-top: 20px;
    display: none;
}

.results.active {
    display: block;
}

.result-card {
    background: var(--card-bg-2);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.result-card.highlight {
    background: rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.result-value {
    font-size: 1.2rem;
    font-weight: bold;
    color: #fff;
    white-space: nowrap;
}

.result-card.highlight .result-value {
    color: var(--accent);
}

.calc-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 12px;
}

/* Long-form content */
.prose {
    max-width: var(--prose);
    margin: 0 auto;
}

.home-sections {
    margin-top: 56px;
}

.prose h1 {
    font-size: 2rem;
    line-height: 1.25;
    color: #fff;
    margin-bottom: 12px;
}

.prose h2 {
    font-size: 1.4rem;
    line-height: 1.3;
    color: #fff;
    margin: 2.2em 0 0.6em;
}

.prose h3 {
    font-size: 1.1rem;
    color: #fff;
    margin: 1.6em 0 0.5em;
}

.prose p,
.prose ul,
.prose ol,
.prose table,
.prose .callout,
.prose .disclaimer,
.prose details {
    margin-bottom: 1.1em;
}

.prose ul,
.prose ol {
    padding-left: 1.4em;
}

.prose li {
    margin-bottom: 0.4em;
}

.prose strong {
    color: #fff;
}

.byline {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.breadcrumbs {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 14px;
}

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

.breadcrumbs span[aria-hidden] {
    margin: 0 6px;
}

.callout {
    background: rgba(76, 175, 80, 0.08);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: 10px;
    padding: 18px 20px;
}

.callout > strong:first-child {
    display: block;
    margin-bottom: 8px;
    color: var(--accent-soft);
}

.callout ul {
    margin-bottom: 0;
}

.disclaimer {
    background: var(--card-bg);
    border-left: 3px solid #f0b429;
    border-radius: 6px;
    padding: 12px 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.table-wrap {
    overflow-x: auto;
    margin-bottom: 1.1em;
}

.prose table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    margin-bottom: 0;
}

.prose th,
.prose td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.prose th {
    color: #fff;
    background: var(--card-bg);
    font-weight: 600;
}

.prose td.num,
.prose th.num {
    text-align: right;
    white-space: nowrap;
}

.prose caption {
    caption-side: bottom;
    text-align: left;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-top: 8px;
}

.cta {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    padding: 10px 18px;
    border-radius: 8px;
}

.cta:hover {
    background: var(--accent-hover);
    color: #fff;
}

/* FAQ */
.faq details {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0;
}

.faq summary {
    cursor: pointer;
    padding: 14px 16px;
    font-weight: 600;
    color: #fff;
    list-style: none;
}

.faq summary::-webkit-details-marker {
    display: none;
}

.faq summary::after {
    content: "+";
    float: right;
    color: var(--accent-soft);
    font-weight: 700;
}

.faq details[open] summary::after {
    content: "\2212";
}

.faq details > div {
    padding: 0 16px 14px;
    color: var(--text-main);
}

.faq details > div p:last-child {
    margin-bottom: 0;
}

/* Guide cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    margin: 16px 0 24px;
}

.guide-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px;
    display: flex;
    flex-direction: column;
}

.guide-card h3 {
    margin: 0 0 8px;
    font-size: 1.1rem;
    line-height: 1.35;
}

.guide-card h3 a {
    color: #fff;
    text-decoration: none;
}

.guide-card h3 a:hover {
    color: var(--accent-soft);
}

.guide-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 12px;
    flex: 1;
}

.guide-card .meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    flex: 0;
}

.sources {
    font-size: 0.9rem;
}

/* Contact form */
.contact-form {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 1.1em;
}

.hidden-field {
    position: absolute;
    left: -9999px;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    background: #161616;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.site-footer .wrap {
    padding-top: 20px;
    padding-bottom: 24px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-muted);
}

.footer-note {
    max-width: 640px;
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.6rem;
    }

    .prose h1 {
        font-size: 1.65rem;
    }

    main.wrap {
        padding-top: 24px;
    }

    .prose table {
        font-size: 0.85rem;
    }

    .prose th,
    .prose td {
        padding: 8px 6px;
    }

    .prose th.num {
        white-space: normal;
    }
}

/* Shift gear (Amazon) */
.affiliate-note {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.gear-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    margin: 16px 0 24px;
}

.gear-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 14px 18px;
    display: flex;
    flex-direction: column;
}

.gear-media {
    display: block;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 12px;
    background: #121212;
}

.gear-media video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
}

.gear-card h3 {
    margin: 0 0 6px;
    font-size: 1.1rem;
}

.gear-card p {
    color: var(--text-main);
    font-size: 0.95rem;
    margin-bottom: 14px;
    flex: 1;
}

.btn-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn-row .cta {
    font-size: 0.95rem;
    padding: 9px 14px;
}

/* Tax savings calculator */
select {
    width: 100%;
    padding: 12px;
    background: #2a2a2a;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    font-family: inherit;
}

select:focus {
    outline: none;
    border-color: var(--accent);
}

.field-help {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.45;
}

.helper {
    background: #232323;
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 16px;
}

.helper summary {
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--accent-soft);
    font-weight: 600;
}

.helper[open] summary {
    margin-bottom: 12px;
}

.helper .input-group {
    margin-bottom: 10px;
}

button.btn-secondary {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent-soft);
    padding: 10px;
    font-size: 0.9rem;
    margin-top: 0;
}

button.btn-secondary:hover {
    background: rgba(76, 175, 80, 0.12);
}

.result-notes {
    list-style: none;
    padding: 0;
    margin: 4px 0 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.result-notes li {
    padding: 8px 0 0 18px;
    position: relative;
    line-height: 1.45;
}

.result-notes li::before {
    content: "•";
    position: absolute;
    left: 4px;
    color: var(--accent-soft);
}

.prose p.callout {
    padding: 14px 18px;
}