/* ============================================================
   TaxLaidOut — mobile-first, accessible, minimal CSS
   Gov.uk-inspired trust + friendly fintech clarity.
   ============================================================ */

:root {
    --colour-primary: #1d70b8;       /* trust blue */
    --colour-primary-dark: #0b3d6b;
    --colour-accent: #00703c;        /* success green */
    --colour-text: #0b0c0c;
    --colour-muted: #6f777b;
    --colour-bg: #f3f2f1;
    --colour-surface: #ffffff;
    --colour-border: #b1b4b6;
    --colour-error: #d4351c;
    --radius: 6px;
    --max-width: 960px;
    --space: 1rem;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-stack);
    color: var(--colour-text);
    background: var(--colour-bg);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Layout ------------------------------------------------- */

.container {
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: 1rem;
}

main#main-content {
    flex: 1 0 auto;
    padding-block: 2rem;
}

/* Navigation --------------------------------------------- */

.nav {
    background: var(--colour-primary-dark);
    color: #fff;
}

.nav__inner {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-block: 0.75rem;
}

.nav__brand {
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
}

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

.nav__links a {
    color: #fff;
    text-decoration: underline;
}

.nav__links a:hover,
.nav__links a:focus {
    text-decoration-thickness: 2px;
}

@media (min-width: 640px) {
    .nav__inner {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

/* Hero --------------------------------------------------- */

.hero h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--colour-primary-dark);
}

.hero__lead {
    font-size: 1.125rem;
    color: var(--colour-text);
    max-width: 42rem;
}

.hero__placeholder {
    color: var(--colour-muted);
}

/* Footer ------------------------------------------------- */

.footer {
    flex-shrink: 0;
    background: var(--colour-surface);
    border-top: 4px solid var(--colour-primary);
    padding-block: 1.5rem;
    font-size: 0.875rem;
}

.footer__links a {
    color: var(--colour-primary);
    font-weight: 600;
}

.footer__disclaimer {
    color: var(--colour-muted);
    max-width: 50rem;
}

.footer__copyright {
    color: var(--colour-muted);
    font-size: 0.8rem;
}

/* Error page --------------------------------------------- */

.error-page h1 {
    color: var(--colour-error);
}

/* Buttons ------------------------------------------------ */

.btn {
    display: inline-block;
    background: var(--colour-primary);
    color: #fff;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    border: 2px solid transparent;
}

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

.btn:focus-visible {
    outline: 3px solid #fd0;
    outline-offset: 0;
}

/* Accessibility ----------------------------------------- */

a:focus-visible,
input:focus-visible,
button:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid #fd0;
    outline-offset: 1px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Responsive grid helper -------------------------------- */

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

@media (min-width: 768px) {
    .grid--2 {
        grid-template-columns: repeat(2, 1fr);
    }
    .grid--3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================================
   Interactive tools — checker & calculator
   ============================================================ */

.tool {
    background: var(--colour-surface);
    border: 1px solid var(--colour-border);
    border-radius: calc(var(--radius) * 2);
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(11, 12, 12, 0.06);
}

.tool__header {
    margin-bottom: 1.5rem;
}

.tool__header h1 {
    font-size: 1.75rem;
    color: var(--colour-primary-dark);
    margin: 0 0 0.5rem;
}

.tool__lede {
    color: var(--colour-muted);
    font-size: 1.05rem;
    max-width: 42rem;
    margin: 0;
}

.tool__note {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--colour-muted);
}

.back-link {
    display: inline-block;
    margin-bottom: 1rem;
    color: var(--colour-primary);
    text-decoration: none;
    font-weight: 600;
}

/* Forms --------------------------------------------------- */

.form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form__group--nested {
    margin-top: 0.75rem;
}

.form__legend {
    font-weight: 700;
    font-size: 1rem;
    padding: 0;
    margin-bottom: 0.5rem;
}

.form__label {
    font-weight: 600;
    font-size: 0.95rem;
}

.form__input,
.form__select {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 2px solid var(--colour-border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    background: #fff;
    color: var(--colour-text);
}

.form__input:focus,
.form__select:focus {
    border-color: var(--colour-primary);
}

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

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

fieldset.form__group {
    border: none;
    padding: 0;
    margin: 0;
}

.form__error {
    color: var(--colour-error);
    font-weight: 600;
    margin: 0 0 0.75rem;
}

/* Radio cards -------------------------------------------- */

.radio-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.625rem;
}

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

.radio-card {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.875rem 1rem;
    border: 2px solid var(--colour-border);
    border-radius: var(--radius);
    cursor: pointer;
    background: #fff;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.radio-card:hover {
    border-color: var(--colour-primary);
}

.radio-card input[type="radio"] {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--colour-primary);
    flex-shrink: 0;
}

.radio-card input[type="radio"]:checked + .radio-card__label {
    font-weight: 700;
}

.radio-card:has(input:checked) {
    border-color: var(--colour-primary);
    background: #eef6ff;
}

.radio-card__label {
    font-weight: 500;
}

/* Checkbox groups ---------------------------------------- */

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
}

.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.875rem;
    border: 2px solid var(--colour-border);
    border-radius: var(--radius);
    cursor: pointer;
    background: #fff;
    font-size: 0.95rem;
}

.checkbox input[type="checkbox"] {
    width: 1.15rem;
    height: 1.15rem;
    accent-color: var(--colour-primary);
}

.checkbox--consent {
    display: flex;
    align-items: flex-start;
    border: none;
    padding: 0;
    background: none;
    font-size: 0.9rem;
    color: var(--colour-text);
    line-height: 1.4;
}

.checkbox--consent input {
    margin-top: 0.15rem;
}

/* Yes/no toggle ------------------------------------------ */

.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--colour-border);
}

.toggle-row:last-child {
    border-bottom: none;
}

.toggle-row__label {
    font-weight: 500;
    flex: 1;
}

.toggle {
    position: relative;
    display: inline-flex;
    cursor: pointer;
    flex-shrink: 0;
}

.toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle__visual {
    display: inline-block;
    width: 3rem;
    height: 1.6rem;
    border-radius: 999px;
    background: var(--colour-border);
    position: relative;
    transition: background 0.15s ease;
}

.toggle__visual::after {
    content: "";
    position: absolute;
    top: 0.2rem;
    left: 0.2rem;
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.15s ease;
}

.toggle input:checked + .toggle__visual {
    background: var(--colour-accent);
}

.toggle input:checked + .toggle__visual::after {
    transform: translateX(1.4rem);
}

.toggle input:focus-visible + .toggle__visual {
    outline: 3px solid #fd0;
    outline-offset: 2px;
}

/* Buttons (extending base) ------------------------------- */

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

.btn--block {
    width: 100%;
    text-align: center;
    font-size: 1.05rem;
    padding-block: 0.875rem;
}

.btn--secondary {
    background: var(--colour-accent);
    color: #fff;
}

.btn--secondary:hover,
.btn--secondary:focus {
    background: #005a30;
}

.btn--ghost {
    background: transparent;
    color: var(--colour-primary);
    border-color: var(--colour-primary);
}

.btn--ghost:hover,
.btn--ghost:focus {
    background: #eef6ff;
}

/* Result cards ------------------------------------------- */

.result {
    background: #fff;
    border: 1px solid var(--colour-border);
    border-radius: calc(var(--radius) * 2);
    padding: 1.5rem;
}

.result__header {
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
    border-left: 8px solid var(--colour-border);
}

.result__header h2 {
    margin: 0 0 0.25rem;
    font-size: 1.4rem;
}

.result__header--green {
    border-left-color: var(--colour-accent);
    background: #e7f3ec;
}

.result__header--amber {
    border-left-color: #d89700;
    background: #fff7e5;
}

.result__header--red {
    border-left-color: var(--colour-error);
    background: #fdecea;
}

.result__header--neutral {
    border-left-color: var(--colour-primary);
    background: #eef6ff;
}

.result__sub {
    margin: 0;
    color: var(--colour-muted);
    font-size: 0.95rem;
}

/* Traffic-light indicators ------------------------------- */

.indicators {
    list-style: none;
    margin: 0 0 1.25rem;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.indicator {
    display: flex;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    background: var(--colour-bg);
    align-items: flex-start;
}

.indicator__dot {
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.25rem;
    background: var(--colour-border);
}

.indicator--green .indicator__dot { background: var(--colour-accent); }
.indicator--amber .indicator__dot { background: #d89700; }
.indicator--red .indicator__dot { background: var(--colour-error); }
.indicator__dot--proposed { background: #6f777b; }

.indicator__title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
}

.indicator__text {
    margin: 0.15rem 0 0;
    font-size: 0.9rem;
    color: var(--colour-text);
}

.badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    vertical-align: middle;
    margin-left: 0.25rem;
}

.badge--proposed {
    background: #6f777b;
    color: #fff;
}

/* Next steps / assumptions / disclaimer ------------------ */

.next-steps h3,
.tax-estimate h3,
.email-capture__title {
    font-size: 1.1rem;
    margin: 0 0 0.5rem;
    color: var(--colour-primary-dark);
}

.next-steps__list {
    margin: 0 0 1.25rem;
    padding-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.next-steps__list li {
    line-height: 1.45;
}

.assumptions {
    margin: 0 0 1rem;
    padding: 0.75rem 1rem;
    background: var(--colour-bg);
    border-radius: var(--radius);
    font-size: 0.85rem;
}

.assumptions summary {
    cursor: pointer;
    font-weight: 600;
}

.disclaimer {
    background: #fff7e5;
    border-left: 4px solid #d89700;
    padding: 0.625rem 0.875rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    margin: 1rem 0;
}

.result__sources {
    font-size: 0.85rem;
    color: var(--colour-muted);
    word-break: break-word;
}

.result__sources a {
    color: var(--colour-primary);
}

.result__verified {
    font-size: 0.8rem;
    color: var(--colour-muted);
    margin: 0.25rem 0 1rem;
}

.result__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    margin-bottom: 1.5rem;
}

/* Calculator figures & tables ---------------------------- */

.figures {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.figure {
    background: var(--colour-bg);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    border-top: 4px solid var(--colour-border);
}

.figure__label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--colour-muted);
    font-weight: 700;
}

.figure__value {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    margin-top: 0.25rem;
}

.figure--green { border-top-color: var(--colour-accent); }
.figure--green .figure__value { color: var(--colour-accent); }
.figure--amber { border-top-color: #d89700; }
.figure--amber .figure__value { color: #b37700; }
.figure--red { border-top-color: var(--colour-error); }
.figure--red .figure__value { color: var(--colour-error); }

.fee-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
}

.fee-table th,
.fee-table td {
    text-align: left;
    padding: 0.5rem 0.5rem;
    border-bottom: 1px solid var(--colour-border);
}

.fee-table th {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--colour-muted);
}

.fee-table .num {
    text-align: right;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.fee-table__subtotal td,
.fee-table__subtotal th {
    font-weight: 700;
    background: var(--colour-bg);
    border-bottom: none;
}

.totals {
    margin: 0 0 1.25rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.4rem;
}

.totals > div {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.4rem 0;
    border-bottom: 1px dashed var(--colour-border);
    font-variant-numeric: tabular-nums;
}

.totals dt {
    color: var(--colour-muted);
    font-weight: 500;
}

.totals dd {
    margin: 0;
    font-weight: 700;
}

.totals__highlight dt,
.totals__highlight dd {
    color: var(--colour-accent);
    font-size: 1.15rem;
}

.tax-estimate {
    background: #eef6ff;
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.25rem;
}

.tax-estimate__figure {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--colour-primary-dark);
    margin: 0 0 0.5rem;
}

.tax-estimate__rate {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--colour-muted);
}

.tax-estimate__note {
    font-size: 0.85rem;
    color: var(--colour-text);
    margin: 0.25rem 0;
}

/* Email capture ------------------------------------------ */

.email-capture {
    background: var(--colour-bg);
    border: 1px solid var(--colour-border);
    border-radius: calc(var(--radius) * 2);
    padding: 1.25rem;
}

.email-capture--done {
    background: #e7f3ec;
    border-color: var(--colour-accent);
}

.email-capture--error {
    border-color: var(--colour-error);
}

.email-capture__lede {
    font-size: 0.9rem;
    color: var(--colour-muted);
    margin: 0 0 0.75rem;
}

.email-capture__form {
    gap: 0.75rem;
}

/* Htmx loading indicator --------------------------------- */

.htmx-indicator {
    display: none;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
    display: inline-block;
}

/* Responsive tweaks for tools ---------------------------- */

@media (max-width: 480px) {
    .figures {
        grid-template-columns: 1fr;
    }
    .result__header h2,
    .tool__header h1 {
        font-size: 1.5rem;
    }
}

/* Homepage: hero trust line + CTA grid ------------------- */

.hero__trust {
    color: var(--colour-muted);
    font-size: 0.95rem;
}

.cta-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
    margin-block: 2rem;
}

@media (min-width: 640px) {
    .cta-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.cta-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: var(--colour-surface);
    border: 2px solid var(--colour-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-decoration: none;
    color: var(--colour-text);
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.cta-card:hover,
.cta-card:focus {
    border-color: var(--colour-primary);
    transform: translateY(-2px);
}

.cta-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--colour-primary-dark);
}

.cta-card__action {
    margin-top: auto;
    font-weight: 600;
    color: var(--colour-primary);
}

/* Value props + trust bar -------------------------------- */

.value-props__list {
    max-width: 42rem;
}

.value-props__list li,
.trust-bar__list li {
    margin-block: 0.35rem;
}

.trust-bar {
    background: var(--colour-surface);
    border: 1px solid var(--colour-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-block: 1.5rem;
}

.trust-bar__list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    margin: 0;
    padding: 0;
    font-weight: 600;
    color: var(--colour-primary-dark);
}

/* SEO link list on homepage ------------------------------ */

.seo-links__list {
    columns: 1;
}

@media (min-width: 560px) {
    .seo-links__list {
        columns: 2;
    }
}

.seo-links__list li {
    margin-block: 0.25rem;
    break-inside: avoid;
}

/* SEO landing pages -------------------------------------- */

.seo-page__header h1 {
    color: var(--colour-primary-dark);
}

.seo-page__intro {
    font-size: 1.125rem;
}

.cta-band {
    background: var(--colour-primary-dark);
    color: #fff;
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-block: 1.5rem;
    text-align: center;
}

.cta-band--alt {
    background: var(--colour-surface);
    color: var(--colour-text);
    border: 2px solid var(--colour-primary);
}

.cta-band__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.prose section {
    margin-block: 1.5rem;
}

.prose h2 {
    color: var(--colour-primary-dark);
    margin-top: 2rem;
}

/* FAQ ---------------------------------------------------- */

.faq-item {
    border-bottom: 1px solid var(--colour-border);
    padding-block: 0.5rem;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 600;
    padding-block: 0.5rem;
    list-style: none;
}

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

.faq-item summary::before {
    content: "+";
    display: inline-block;
    width: 1.25rem;
    color: var(--colour-primary);
    font-weight: 700;
}

.faq-item[open] summary::before {
    content: "–";
}

.faq-item__answer {
    padding-block: 0.5rem 1rem;
    color: var(--colour-text);
}

.seo-page__related ul {
    list-style: disc;
}

/* Legal pages -------------------------------------------- */

.legal-page {
    max-width: 46rem;
}

.legal-page__updated {
    color: var(--colour-muted);
}

.legal-table {
    width: 100%;
    border-collapse: collapse;
    margin-block: 1rem;
}

.legal-table th,
.legal-table td {
    border: 1px solid var(--colour-border);
    padding: 0.5rem 0.75rem;
    text-align: left;
    vertical-align: top;
}

.legal-table thead th {
    background: var(--colour-bg);
}