:root {
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-active: #1e40af;
    --color-primary-soft: #eaf2ff;
    --color-navy: #0f2747;
    --color-navy-light: #17385f;
    --color-text-primary: #102033;
    --color-text-secondary: #52647a;
    --color-text-muted: #64748b;
    --color-background: #ffffff;
    --color-background-soft: #f3f7fc;
    --color-surface: #ffffff;
    --color-surface-elevated: #fbfdff;
    --color-border: #d8e2ee;
    --color-border-strong: #aebfd2;
    --color-success: #15803d;
    --color-warning: #a16207;
    --color-danger: #b42318;
    --shadow-xs: 0 1px 2px rgb(15 39 71 / 6%);
    --shadow-sm: 0 4px 14px rgb(15 39 71 / 7%);
    --shadow-md: 0 16px 36px rgb(15 39 71 / 10%);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 28px;
    --space-8: 32px;
    --space-9: 36px;
    --space-10: 40px;
    --space-11: 48px;
    --space-12: 64px;
    --container-sm: 720px;
    --container-md: 960px;
    --container-lg: 1200px;
    --container-xl: 1320px;
    --header-height: 72px;
    --page-gutter: 32px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
    min-width: 0;
    margin: 0;
    color: var(--color-text-primary);
    background: var(--color-background);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    text-align: left;
    -webkit-font-smoothing: antialiased;
}

body.menu-open {
    overflow: hidden;
}

img,
svg {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: var(--color-primary-hover);
}

h1,
h2,
h3,
h4,
p {
    margin-top: 0;
}

h1,
h2,
h3,
h4 {
    color: var(--color-navy);
    line-height: 1.15;
    text-wrap: balance;
}

p {
    color: var(--color-text-secondary);
}

.container {
    width: min(calc(100% - (var(--page-gutter) * 2)), var(--container-xl));
    margin-inline: auto;
}

.section {
    padding-block: var(--space-12);
}

.section-muted {
    background: var(--color-background-soft);
}

.section-heading {
    max-width: 700px;
    margin-bottom: 32px;
}

.section-heading.center {
    margin-inline: auto;
    text-align: center;
}

.section-kicker {
    margin-bottom: 10px;
    color: var(--color-primary-hover);
    font-size: 0.875rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.section-heading h2 {
    margin-bottom: 12px;
    font-size: clamp(1.875rem, 3vw, 2.75rem);
}

.section-heading p {
    margin-bottom: 0;
    font-size: clamp(1rem, 1.25vw, 1.125rem);
}

.section[id],
footer[id],
#main-content {
    scroll-margin-top: calc(var(--header-height) + var(--space-5));
}

.skip-link {
    position: fixed;
    z-index: 1000;
    top: 8px;
    left: 8px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: var(--color-navy);
    color: #fff;
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

:focus-visible {
    outline: 3px solid #f4b942;
    outline-offset: 3px;
}

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

.site-header {
    position: sticky;
    z-index: 100;
    top: 0;
    isolation: isolate;
    min-height: var(--header-height);
    border-bottom: 1px solid rgb(216 226 238 / 90%);
    background: rgb(255 255 255 / 94%);
    backdrop-filter: blur(14px);
}

.site-header[data-scrolled="true"] {
    box-shadow: var(--shadow-xs);
}

.nav-shell {
    display: flex;
    position: relative;
    z-index: 1;
    min-height: var(--header-height);
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand-link {
    display: inline-flex;
    min-width: 160px;
    min-height: 44px;
    align-items: center;
    text-decoration: none;
}

.brand-logo {
    width: 158px;
    height: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-menu a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    padding: 8px 11px;
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-size: 0.95rem;
    font-weight: 650;
    text-decoration: none;
}

.nav-menu a:hover {
    background: var(--color-background-soft);
    color: var(--color-primary-hover);
}

.nav-menu a[aria-current="location"] {
    background: var(--color-primary-soft);
    color: var(--color-primary-active);
}

.nav-menu .nav-cta {
    margin-left: 6px;
    padding-inline: 16px;
    background: var(--color-primary);
    color: #fff;
}

.nav-menu .nav-cta:hover {
    background: var(--color-primary-hover);
    color: #fff;
}

.menu-toggle {
    display: none;
    position: relative;
    z-index: 120;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-navy);
    cursor: pointer;
    pointer-events: auto;
    touch-action: manipulation;
    -webkit-appearance: none;
    appearance: none;
}

.menu-toggle:hover {
    border-color: var(--color-border-strong);
    background: var(--color-background-soft);
}

.menu-overlay {
    position: fixed;
    z-index: 90;
    inset: var(--header-height) 0 0;
    display: none;
    width: 100%;
    height: auto;
    padding: 0;
    border: 0;
    background: rgb(15 39 71 / 38%);
    cursor: pointer;
    pointer-events: none;
}

.menu-overlay[data-open="true"] {
    display: block;
    pointer-events: auto;
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
}

.icon-close,
.menu-toggle[aria-expanded="true"] .icon-menu {
    display: none;
}

.menu-toggle[aria-expanded="true"] .icon-close {
    display: block;
}

.button {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 11px 20px;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: #fff;
    font-weight: 750;
    line-height: 1.3;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
}

.button:active {
    background: var(--color-primary-active);
    transform: translateY(0);
}

.button-secondary {
    border-color: var(--color-border);
    background: var(--color-surface);
    color: var(--color-navy);
}

.button-secondary:hover {
    border-color: var(--color-border-strong);
    background: var(--color-background-soft);
}

.button-secondary:active {
    border-color: var(--color-border-strong);
    background: #e8eef6;
    color: var(--color-navy);
}

.button-dark {
    background: var(--color-navy);
}

.button-dark:hover {
    background: var(--color-navy-light);
}

.button-dark:active {
    background: #0b1d35;
}

.button-success {
    background: var(--color-success);
}

.button-success:hover {
    background: #116c35;
}

.button-success:active {
    background: #0f5d2f;
}

.button-danger {
    border-color: #f1c4bf;
    background: #fff7f6;
    color: var(--color-danger);
}

.button-danger:hover {
    background: #feeceb;
}

.button-danger:active {
    background: #fbdeda;
    color: var(--color-danger);
}

.button-small {
    min-height: 44px;
    padding: 9px 14px;
    font-size: 0.9rem;
}

.button svg,
.external-icon {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
}

.hero {
    position: relative;
    overflow: clip;
    padding-block: clamp(60px, 7vw, 96px) var(--space-12);
    background:
        radial-gradient(circle at 82% 18%, rgb(37 99 235 / 14%), transparent 28%),
        linear-gradient(180deg, #f8fbff 0%, #fff 100%);
}

.hero::after {
    position: absolute;
    width: 420px;
    height: 420px;
    border: 80px solid rgb(37 99 235 / 4%);
    border-radius: 50%;
    content: "";
    right: -210px;
    bottom: -280px;
    pointer-events: none;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
    align-items: center;
    gap: clamp(40px, 5vw, 68px);
}

.badge {
    display: inline-flex;
    min-height: 32px;
    align-items: center;
    gap: 8px;
    margin-bottom: 22px;
    padding: 5px 11px;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    background: #eff6ff;
    color: #1e40af;
    font-size: 0.875rem;
    font-weight: 800;
}

.badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-primary);
}

.hero h1 {
    max-width: 780px;
    margin-bottom: 22px;
    font-size: clamp(2.5rem, 4.3vw, 4.75rem);
    line-height: 1.06;
    letter-spacing: -0.045em;
}

.hero-lead {
    max-width: 690px;
    margin-bottom: 30px;
    font-size: clamp(1.05rem, 1.4vw, 1.25rem);
}

.hero-actions,
.learning-actions,
.form-actions,
.document-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.trust-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
    margin: 26px 0 0;
    padding: 0;
    list-style: none;
}

.trust-list li {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--color-text-secondary);
    font-size: 0.925rem;
    font-weight: 650;
}

.trust-list svg {
    width: 18px;
    height: 18px;
    color: var(--color-success);
}

.hero-panel {
    padding: var(--space-7);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
}

.hero-panel-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 750;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.hero-panel-label span:last-child {
    color: var(--color-success);
}

.mini-tool-list {
    display: grid;
    gap: 10px;
}

.mini-tool {
    display: grid;
    grid-template-columns: 40px 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    text-decoration: none;
    transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.mini-tool:hover {
    border-color: var(--color-border-strong);
    background: var(--color-background-soft);
    transform: translateY(-1px);
}

.mini-tool:active {
    transform: translateY(0);
}

.mini-tool-icon {
    display: grid;
    width: 40px;
    height: 40px;
    place-items: center;
    border-radius: var(--radius-sm);
    background: var(--color-primary-soft);
    color: var(--color-primary-hover);
}

.mini-tool-icon svg {
    width: 22px;
    height: 22px;
}

.mini-tool strong,
.mini-tool small {
    display: block;
}

.mini-tool small {
    margin-top: 2px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.mini-tool > svg {
    width: 18px;
    height: 18px;
    color: var(--color-text-secondary);
}

.beta-note {
    margin: 18px 0 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    text-align: center;
}

.tool-group + .tool-group {
    margin-top: 38px;
}

.tool-group-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    font-size: 1rem;
}

.tool-group-title::after {
    height: 1px;
    flex: 1;
    background: var(--color-border);
    content: "";
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.tool-card {
    display: grid;
    min-height: 164px;
    grid-template-columns: 48px 1fr;
    grid-template-rows: auto 1fr auto;
    gap: 4px 15px;
    padding: var(--space-5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: inherit;
    text-decoration: none;
    transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.tool-card:hover {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.tool-card:active {
    transform: translateY(0);
}

.tool-card-icon {
    display: grid;
    width: 48px;
    height: 48px;
    grid-row: 1 / span 2;
    place-items: center;
    border-radius: var(--radius-md);
    background: var(--color-primary-soft);
    color: var(--color-primary-hover);
}

.tool-card-icon svg {
    width: 25px;
    height: 25px;
}

.tool-card h3 {
    align-self: center;
    margin-bottom: 0;
    font-size: 1.15rem;
}

.tool-card p {
    grid-column: 1 / -1;
    margin: 13px 0 0;
    font-size: 1rem;
    line-height: 1.55;
}

.tool-card-cta {
    display: inline-flex;
    grid-column: 1 / -1;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    color: var(--color-primary-hover);
    font-size: 0.9rem;
    font-weight: 800;
}

.tool-card-cta svg {
    width: 16px;
    height: 16px;
    transition: transform 180ms ease;
}

.tool-card:hover .tool-card-cta svg {
    transform: translateX(3px);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    counter-reset: steps;
}

.step {
    position: relative;
    counter-increment: steps;
}

.step::before {
    display: grid;
    width: 44px;
    height: 44px;
    margin-bottom: 18px;
    place-items: center;
    border-radius: var(--radius-md);
    background: var(--color-navy);
    color: #fff;
    content: counter(steps);
    font-weight: 800;
}

.step:not(:last-child)::after {
    position: absolute;
    top: 21px;
    left: 58px;
    width: calc(100% - 42px);
    height: 2px;
    background: #dbeafe;
    content: "";
}

.step h3 {
    margin-bottom: 8px;
    font-size: 1.12rem;
}

.step p {
    margin-bottom: 0;
}

.preview-grid,
.learning-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
    align-items: center;
    gap: clamp(36px, 5vw, 64px);
}

.preview-grid > *,
.learning-grid > * {
    min-width: 0;
}

.preview-copy p,
.learning-copy p {
    font-size: 1.05rem;
}

.preview-copy ul {
    display: grid;
    gap: 10px;
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
}

.preview-copy li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.preview-copy li svg {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
    margin-top: 3px;
    color: var(--color-success);
}

.invoice-preview {
    padding: clamp(20px, 4vw, 36px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
}

.invoice-preview-head {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding-bottom: 18px;
    border-bottom: 3px solid var(--color-primary);
}

.invoice-preview-mark {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: var(--radius-md);
    background: var(--color-navy);
    color: #fff;
    font-weight: 850;
}

.invoice-preview-title {
    text-align: right;
}

.invoice-preview-title strong,
.invoice-preview-title small {
    display: block;
}

.invoice-preview-title strong {
    color: var(--color-primary-hover);
    font-size: 1.5rem;
}

.invoice-preview-customer {
    padding-block: 20px;
}

.preview-line {
    height: 8px;
    margin-top: 8px;
    border-radius: 99px;
    background: #dce5ef;
}

.preview-line.short {
    width: 42%;
}

.preview-line.medium {
    width: 65%;
}

.preview-table-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 70px 100px;
    gap: 12px;
    padding: 11px 8px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.8rem;
}

.preview-table-row.header {
    background: var(--color-background-soft);
    color: var(--color-navy);
    font-weight: 800;
}

.preview-total {
    width: 54%;
    margin: 22px 0 0 auto;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    color: #fff;
    font-weight: 800;
    text-align: right;
}

.learning-section {
    background: var(--color-navy);
}

.learning-copy h2,
.learning-copy .section-kicker {
    color: #fff;
}

.learning-copy p {
    color: #c8d7e8;
}

.learning-points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.learning-point {
    min-height: 156px;
    padding: 20px;
    border: 1px solid rgb(255 255 255 / 15%);
    border-radius: var(--radius-md);
    background: rgb(255 255 255 / 6%);
}

.learning-point svg {
    width: 26px;
    height: 26px;
    margin-bottom: 14px;
    color: #8ab4ff;
}

.learning-point strong {
    display: block;
    color: #fff;
}

.learning-point p {
    margin: var(--space-2) 0 0;
    color: #d7e3f0;
    font-size: 0.925rem;
    line-height: 1.55;
}

.learning-actions {
    margin-top: 26px;
}

.learning-actions .button-secondary {
    border-color: rgb(255 255 255 / 28%);
    background: transparent;
    color: #fff;
}

.faq-list {
    max-width: 960px;
    margin: 0 auto;
    border-top: 1px solid var(--color-border);
}

.faq-list details {
    border-bottom: 1px solid var(--color-border);
}

.faq-list summary {
    position: relative;
    min-height: 64px;
    padding: 20px 56px 20px 12px;
    color: var(--color-navy);
    font-weight: 750;
    cursor: pointer;
    list-style: none;
}

.faq-list details[open] {
    background: var(--color-background-soft);
}

.faq-list details[open] summary {
    color: var(--color-primary-active);
}

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

.faq-list summary::after {
    position: absolute;
    top: 18px;
    right: 8px;
    width: 28px;
    height: 28px;
    color: var(--color-primary-hover);
    content: "+";
    font-size: 1.5rem;
    line-height: 1;
    text-align: center;
}

.faq-list details[open] summary::after {
    content: "−";
}

.faq-answer {
    max-width: 720px;
    padding: 0 56px 20px 12px;
}

.faq-answer p {
    margin-bottom: 0;
}

.site-footer {
    padding-block: var(--space-12) var(--space-6);
    border-top: 1px solid var(--color-border);
    background: #f8fafc;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr;
    gap: clamp(36px, 5vw, 72px);
}

.footer-logo {
    width: 176px;
    height: auto;
    margin-bottom: 14px;
}

.footer-about {
    max-width: 430px;
}

.footer-title {
    margin-bottom: 8px;
    font-size: 1.075rem;
}

.footer-links {
    display: grid;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-links a {
    display: inline-flex;
    min-height: 32px;
    align-items: center;
    color: var(--color-text-secondary);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.footer-contact {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
    font-style: normal;
}

.footer-email {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    color: var(--color-text-secondary);
    overflow-wrap: anywhere;
    text-underline-offset: 3px;
}

.footer-email:hover {
    color: var(--color-primary-hover);
}

.footer-social-link {
    display: inline-grid;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-navy);
    background: var(--color-surface);
    text-decoration: none;
    place-items: center;
    transition: border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.footer-social-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-hover);
    transform: translateY(-1px);
}

.footer-social-link svg {
    width: 21px;
    height: 21px;
}

.footer-disclaimer {
    max-width: 920px;
    margin: var(--space-10) 0 0;
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: var(--space-5);
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* Tool pages */
.tool-page {
    background: var(--color-background-soft);
}

.tool-main {
    padding-block: var(--space-10) var(--space-12);
}

.tool-breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.tool-breadcrumbs a {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    color: var(--color-text-secondary);
}

.tool-intro {
    max-width: 820px;
    margin-bottom: 30px;
}

.tool-intro h1 {
    margin-bottom: 12px;
    font-size: clamp(2.125rem, 4vw, 3.4rem);
}

.tool-intro p {
    margin-bottom: 0;
    font-size: 1.05rem;
}

.tool-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.7fr);
    align-items: start;
    gap: 24px;
}

.panel {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-xs);
}

.form-panel,
.result-panel,
.document-form-panel {
    padding: clamp(20px, 4vw, 30px);
}

.panel-heading {
    margin-bottom: 24px;
}

.panel-heading h2 {
    margin-bottom: 7px;
    font-size: 1.35rem;
}

.panel-heading p {
    margin-bottom: 0;
    font-size: 0.925rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.form-group {
    min-width: 0;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label,
.field-label {
    display: block;
    margin-bottom: 7px;
    color: var(--color-text-primary);
    font-size: 0.95rem;
    font-weight: 750;
}

.required-mark {
    color: var(--color-danger);
}

.form-group input,
.form-group select,
.form-group textarea,
.item-field input {
    width: 100%;
    min-height: 48px;
    padding: 11px 13px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background: #fff;
    color: var(--color-text-primary);
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.form-group textarea {
    min-height: 104px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.item-field input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgb(37 99 235 / 12%);
    outline: none;
}

.form-group input[aria-invalid="true"],
.item-field input[aria-invalid="true"] {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgb(180 35 24 / 10%);
}

.helper-text,
.error-text {
    display: block;
    margin-top: 6px;
    font-size: 0.875rem;
    line-height: 1.45;
}

.helper-text {
    color: var(--color-text-secondary);
}

.error-text {
    min-height: 1.2em;
    color: var(--color-danger);
    font-weight: 650;
}

.form-actions {
    margin-top: 26px;
}

.calculator-status,
.autosave-status {
    min-height: 24px;
    margin: 14px 0 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.result-panel {
    position: sticky;
    top: calc(var(--header-height) + 20px);
}

.result-panel h2 {
    margin-bottom: 18px;
    font-size: 1.35rem;
}

.result-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 13px 0;
    border-bottom: 1px solid var(--color-border);
}

.result-row span {
    color: var(--color-text-secondary);
}

.result-row strong {
    text-align: right;
}

.result-row.highlight {
    margin: 10px -12px;
    padding: 15px 12px;
    border: 0;
    border-radius: var(--radius-md);
    background: var(--color-primary-soft);
    color: var(--color-primary-hover);
}

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

.result-actions .button {
    width: 100%;
}

.button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.calculation-info {
    margin-top: 24px;
    border-top: 1px solid var(--color-border);
}

.calculation-info summary {
    min-height: 48px;
    padding-block: 14px;
    color: var(--color-navy);
    font-weight: 750;
    cursor: pointer;
}

.calculation-info[open] summary {
    color: var(--color-primary-active);
}

.calculation-info p,
.calculation-info ol {
    color: var(--color-text-secondary);
    font-size: 0.925rem;
}

.error-summary {
    margin-bottom: var(--space-5);
    padding: var(--space-4);
    border: 1px solid #e9aaa3;
    border-radius: var(--radius-md);
    background: #fff7f6;
}

.error-summary[hidden] {
    display: none;
}

.error-summary h2 {
    margin-bottom: var(--space-2);
    color: var(--color-danger);
    font-size: 1rem;
}

.error-summary ul {
    margin: 0;
    padding-left: var(--space-5);
    color: var(--color-text-primary);
}

.related-tools {
    padding-top: 42px;
}

.related-tools h2 {
    font-size: 1.35rem;
}

/* Document builders */
.document-page-main {
    padding-block: 36px 72px;
}

.document-builder-layout {
    display: grid;
    grid-template-columns: minmax(360px, 0.85fr) minmax(520px, 1.15fr);
    align-items: start;
    gap: 24px;
}

.document-form-panel {
    min-width: 0;
}

.document-form-section + .document-form-section {
    margin-top: 30px;
    padding-top: 28px;
    border-top: 1px solid var(--color-border);
}

.document-form-section h2 {
    margin-bottom: 6px;
    font-size: 1.12rem;
}

.section-help {
    margin-bottom: 18px;
    font-size: 0.875rem;
}

.upload-box {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 10px;
}

.upload-preview {
    display: none;
    width: 88px;
    height: 88px;
    margin-top: 10px;
    padding: 5px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    object-fit: contain;
    background: #fff;
}

.upload-preview[data-visible="true"] {
    display: block;
}

.items-list {
    display: grid;
    gap: 12px;
}

.item-editor {
    display: grid;
    grid-template-columns: minmax(160px, 1fr) 92px 130px 120px 44px;
    align-items: end;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface-elevated);
}

.item-number {
    display: none;
}

.item-field label,
.item-field .field-label {
    display: block;
    margin-bottom: 6px;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 750;
}

.item-total {
    min-height: 48px;
    padding: 12px 8px;
    font-size: 0.875rem;
    font-weight: 800;
    text-align: right;
}

.remove-item {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border: 1px solid #f1c4bf;
    border-radius: var(--radius-sm);
    background: #fff7f6;
    color: var(--color-danger);
    cursor: pointer;
}

.remove-item svg {
    width: 19px;
    height: 19px;
}

.items-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 14px;
}

.live-subtotal {
    margin: 0;
    color: var(--color-navy);
    font-weight: 800;
}

.document-actions {
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.document-preview-shell {
    position: sticky;
    top: calc(var(--header-height) + 20px);
    min-width: 0;
}

.preview-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
}

.preview-toolbar h2 {
    margin: 0;
    font-size: 1.05rem;
}

.business-document {
    width: 100%;
    min-height: 920px;
    padding: clamp(24px, 5vw, 48px);
    border: 1px solid var(--color-border);
    background: #fff;
    box-shadow: var(--shadow-sm);
    color: #172033;
}

.business-document p {
    color: #45566c;
}

.doc-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 28px;
    padding-bottom: 22px;
    border-bottom: 3px solid var(--color-primary);
}

.doc-company {
    display: flex;
    max-width: 64%;
    align-items: flex-start;
    gap: 14px;
}

.doc-logo {
    display: none;
    width: 82px;
    max-height: 82px;
    flex: 0 0 auto;
    object-fit: contain;
}

.doc-logo[data-visible="true"] {
    display: block;
}

.doc-company h2 {
    margin-bottom: 6px;
    font-size: 1.15rem;
    text-transform: uppercase;
}

.doc-company p,
.doc-meta p {
    margin-bottom: 3px;
    font-size: 0.78rem;
    line-height: 1.45;
}

.doc-meta {
    text-align: right;
}

.doc-document-title {
    margin-bottom: 10px;
    color: var(--color-primary-hover);
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.15;
}

.doc-status {
    display: inline-block;
    margin-top: 7px;
    padding: 4px 9px;
    border-radius: 999px;
    background: #fef3c7;
    color: #854d0e;
    font-size: 0.72rem;
    font-weight: 800;
}

.doc-status.paid {
    background: #dcfce7;
    color: #166534;
}

.doc-customer {
    margin-block: 26px;
    text-align: left;
}

.doc-customer h2,
.doc-notes h2,
.doc-payment h2 {
    margin-bottom: 8px;
    color: var(--color-primary-hover);
    font-size: 0.82rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.doc-customer strong {
    display: block;
    margin-bottom: 4px;
}

.doc-customer p,
.doc-notes p,
.doc-payment p {
    margin-bottom: 3px;
    font-size: 0.82rem;
    white-space: pre-line;
}

.document-items {
    display: grid;
    border: 1px solid #cbd5e1;
}

.document-item-row {
    display: grid;
    grid-template-columns: 42px minmax(160px, 1fr) 70px 105px 115px;
    border-bottom: 1px solid #cbd5e1;
}

.document-item-row:last-child {
    border-bottom: 0;
}

.document-item-row.header {
    background: #eaf2ff;
    color: #173f79;
    font-size: 0.75rem;
    font-weight: 800;
}

.document-item-cell {
    padding: 9px 8px;
    font-size: 0.78rem;
}

.document-item-cell.numeric {
    text-align: right;
}

.document-item-cell.number {
    text-align: center;
}

.document-totals {
    width: min(100%, 330px);
    margin: 22px 0 26px auto;
}

.document-total-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 9px 11px;
    border: 1px solid var(--color-border);
    border-bottom: 0;
    font-size: 0.82rem;
}

.document-total-row:last-child {
    border-bottom: 1px solid var(--color-border);
}

.document-total-row.grand {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.92rem;
    font-weight: 800;
}

.doc-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-top: 28px;
}

.doc-notes,
.doc-payment {
    padding: 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    break-inside: avoid;
}

.doc-qr {
    display: none;
    width: 90px;
    height: 90px;
    margin-top: 10px;
    object-fit: contain;
}

.doc-qr[data-visible="true"] {
    display: block;
}

.doc-signatures {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 70px;
    break-inside: avoid;
}

.doc-signature {
    padding-top: 8px;
    border-top: 1px solid #475569;
    color: #475569;
    font-size: 0.75rem;
}

.doc-footer {
    margin-top: 48px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.72rem;
    text-align: center;
}

.legal-page {
    padding-block: 52px 80px;
}

.legal-content {
    max-width: 780px;
}

.legal-content h1 {
    font-size: clamp(2rem, 5vw, 3rem);
}

.legal-content h2 {
    margin-top: 34px;
    font-size: 1.35rem;
}

@media (max-width: 1050px) {
    .document-builder-layout {
        grid-template-columns: 1fr;
    }

    .document-preview-shell {
        position: static;
    }
}

@media (max-width: 899px) {
    :root {
        --header-height: 64px;
        --page-gutter: 24px;
    }

    .section {
        padding-block: 52px;
    }

    /* Avoid iOS Safari hit-testing bugs on sticky, blurred headers. */
    .site-header {
        background: #fff;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        right: 0;
        left: 0;
        z-index: 110;
        display: none;
        max-height: calc(100dvh - var(--header-height));
        padding: 16px 18px 24px;
        border-bottom: 1px solid var(--color-border);
        background: #fff;
        box-shadow: var(--shadow-md);
        overflow-y: auto;
        opacity: 0;
        pointer-events: none;
        transform: translateY(-8px);
        visibility: hidden;
        transition: opacity 180ms ease, transform 180ms ease;
    }

    .nav-menu[data-open="true"] {
        display: grid;
        gap: 4px;
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
        visibility: visible;
    }

    .nav-menu a {
        width: 100%;
        min-height: 48px;
        padding-inline: 14px;
    }

    .nav-menu .nav-cta {
        margin: 8px 0 0;
        justify-content: center;
    }

    .brand-logo {
        width: 150px;
    }

    .hero-grid,
    .preview-grid,
    .learning-grid,
    .tool-layout {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 56px;
    }

    .hero-panel {
        max-width: 560px;
    }

    .tool-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .result-panel {
        position: static;
    }

    .footer-grid {
        grid-template-columns: 1.2fr 1fr;
    }

    .footer-brand-column {
        grid-column: 1 / -1;
    }
}

@media (max-width: 680px) {
    :root {
        --page-gutter: 20px;
    }

    .section {
        padding-block: 48px;
    }

    .hero {
        padding-block: 48px 52px;
    }

    .hero::after {
        display: none;
    }

    .hero h1 {
        font-size: clamp(2.15rem, 10.5vw, 3.2rem);
    }

    .hero-actions .button,
    .learning-actions .button {
        width: 100%;
    }

    .trust-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .tool-grid,
    .steps-grid,
    .learning-points,
    .footer-grid,
    .form-grid,
    .doc-details-grid,
    .doc-signatures {
        grid-template-columns: 1fr;
    }

    .tool-card {
        min-height: 112px;
        grid-template-columns: 44px 1fr 20px;
        grid-template-rows: auto auto;
        align-items: center;
        padding: var(--space-4);
    }

    .tool-card-icon {
        width: 44px;
        height: 44px;
        grid-row: 1 / span 2;
    }

    .tool-card h3 {
        grid-column: 2;
    }

    .tool-card p {
        display: block;
        grid-column: 2;
        margin: 2px 0 0;
        font-size: 0.9rem;
    }

    .tool-card-cta {
        display: grid;
        grid-column: 3;
        grid-row: 1 / span 2;
        margin: 0;
        place-items: center;
    }

    .tool-card-cta span {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
    }

    .steps-grid {
        gap: var(--space-7);
    }

    .step {
        display: grid;
        grid-template-columns: 44px 1fr;
        gap: 0 16px;
    }

    .step::before {
        grid-row: 1 / span 2;
        margin: 0;
    }

    .step:not(:last-child)::after {
        display: block;
        top: 52px;
        left: 21px;
        width: 2px;
        height: calc(100% + 8px);
    }

    .step h3 {
        margin-bottom: 5px;
    }

    .step p {
        grid-column: 2;
    }

    .invoice-preview {
        transform: none;
    }

    .faq-list summary {
        padding-left: var(--space-2);
    }

    .faq-answer {
        padding-right: var(--space-8);
        padding-left: var(--space-2);
    }

    .footer-brand-column,
    .form-group.full-width {
        grid-column: auto;
    }

    .footer-bottom {
        display: grid;
    }

    .form-actions .button,
    .document-actions .button {
        width: 100%;
    }

    .item-editor {
        grid-template-columns: 1fr 1fr;
        align-items: end;
    }

    .item-number {
        display: block;
        grid-column: 1;
        color: var(--color-navy);
        font-size: 0.86rem;
        font-weight: 800;
    }

    .item-field.name {
        grid-column: 1 / -1;
    }

    .item-total {
        text-align: left;
    }

    .remove-item {
        justify-self: end;
    }

    .items-footer {
        align-items: stretch;
        flex-direction: column;
    }

    .upload-box {
        grid-template-columns: 1fr;
    }

    .business-document {
        min-height: auto;
        padding: 22px 16px;
    }

    .doc-header {
        display: grid;
    }

    .doc-company {
        max-width: 100%;
    }

    .doc-meta {
        text-align: left;
    }

    .document-item-row.header {
        display: none;
    }

    .document-item-row {
        grid-template-columns: 1fr 1fr;
        gap: 4px 12px;
        padding: 12px;
    }

    .document-item-cell {
        padding: 2px 0;
    }

    .document-item-cell::before {
        display: block;
        color: var(--color-text-secondary);
        content: attr(data-label);
        font-size: 0.68rem;
        font-weight: 750;
    }

    .document-item-cell.name {
        grid-column: 1 / -1;
    }

    .document-item-cell.number,
    .document-item-cell.numeric {
        text-align: left;
    }

    .doc-signatures {
        gap: 56px;
    }
}

@media (max-width: 430px) {
    .mini-tool small {
        display: none;
    }
}

@media (max-width: 380px) {
    :root {
        --page-gutter: 16px;
    }

    .trust-list {
        grid-template-columns: 1fr;
    }

    .hero-panel,
    .form-panel,
    .result-panel,
    .document-form-panel {
        padding: 18px;
    }

    .mini-tool {
        grid-template-columns: 36px 1fr auto;
        padding: 10px;
    }

    .hero-panel-label {
        align-items: flex-start;
        flex-direction: column;
        gap: var(--space-1);
    }

    .mini-tool-icon {
        width: 36px;
        height: 36px;
    }

    .preview-table-row {
        grid-template-columns: minmax(0, 1fr) 56px 76px;
        gap: 7px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

@page {
    size: A4;
    margin: 12mm;
}

@media print {
    body {
        min-width: 0;
        background: #fff;
    }

    .no-print,
    .site-header,
    .site-footer,
    .document-form-panel,
    .preview-toolbar,
    .tool-breadcrumbs,
    .tool-intro {
        display: none !important;
    }

    .document-page-main,
    .container,
    .document-builder-layout,
    .document-preview-shell {
        display: block;
        width: 100%;
        max-width: none;
        margin: 0;
        padding: 0;
    }

    .business-document {
        width: 100%;
        min-height: auto;
        margin: 0;
        padding: 0;
        border: 0;
        box-shadow: none;
    }

    .document-item-row,
    .doc-header,
    .doc-customer,
    .document-totals,
    .doc-details-grid,
    .doc-signatures {
        break-inside: avoid;
        page-break-inside: avoid;
    }

    .document-item-row.header {
        background: #eaf2ff !important;
        print-color-adjust: exact;
        -webkit-print-color-adjust: exact;
    }

    .document-total-row.grand {
        background: var(--color-primary) !important;
        color: #fff !important;
        print-color-adjust: exact;
        -webkit-print-color-adjust: exact;
    }
}