/* UnitSheet — palette from the logo: forest #1f7e2d, charcoal #4a4a4a, white */
:root {
    --base: #1f7e2d;
    --base-hover: #165f21;
    --base-light: #378142;
    --base-tint: #83dd90;
    --link: #1f6b2a;
    --charcoal: #4a4a4a;
    --muted: #6b6b6b;
    --bg: #f2f6f3;
    --surface: #ffffff;
    --border: #d4ddd6;
    --base-soft: rgba(31, 126, 45, 0.08);
    --base-soft-2: rgba(31, 126, 45, 0.12);
    --base-ring: rgba(31, 126, 45, 0.2);
    --base-shadow-form: rgba(31, 126, 45, 0.07);
    --base-shadow: rgba(31, 126, 45, 0.15);
    --base-shadow-menu: rgba(31, 126, 45, 0.16);
    --base-shadow-float: rgba(31, 126, 45, 0.18);
    --base-shadow-cta: rgba(31, 126, 45, 0.28);
    --base-shadow-cta-hover: rgba(31, 126, 45, 0.32);
    --form-max-width: 40rem;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, Georgia, 'Times New Roman', serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--charcoal);
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-size-adjust: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1,
h2,
h3,
h4 {
    font-family: Georgia, 'Times New Roman', serif;
    font-weight: 400;
    color: var(--base);
}

h1 {
    margin-bottom: 1rem;
    text-align: left;
}

p {
    color: var(--charcoal);
    line-height: 1.6;
}

a {
    color: var(--link);
    text-decoration: underline;
    text-underline-offset: 0.15em;
    cursor: pointer;
}

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


.coming-soon {
    background-color: var(--base);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    margin-bottom: 0;
}

/* Header navigation */
.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--surface);
    padding: 0.5rem 1rem;
    box-shadow: 0 2px 4px var(--base-soft);
    width: 100vw;
    box-sizing: border-box;
    position: relative;
    z-index: 200;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-menu {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex: 1;
    margin-left: 2rem;
}

.nav-left-menu,
.nav-right-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: var(--base);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-center {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: stretch;
    gap: 0.7rem;
    margin-right: 1.5rem;
    padding: 0;
}

.header-nav a.logo-link {
    padding: 0;
    font-weight: 400;
}

.header-nav a.logo-link:hover,
.header-nav a.logo-link.active {
    background-color: transparent;
}

.logo {
    display: block;
    height: 3rem;
    width: auto;
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0;
    line-height: 1;
}

.logo-name {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.7rem;
    font-weight: 400;
    color: var(--base);
    letter-spacing: -0.02em;
    line-height: 1;
}

.logo-name span {
    color: var(--charcoal);
}

.logo-tagline {
    font-family: Palatino, 'Palatino Linotype', 'Book Antiqua', Georgia, serif;
    font-style: italic;
    font-size: 0.88rem;
    font-weight: 400;
    color: var(--charcoal);
    letter-spacing: 0.01em;
    line-height: 1;
    white-space: nowrap;
}

.header-nav a {
    color: var(--charcoal);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s;
    font-weight: 500;
    font-size: 1.25rem;
    margin: 0;
    cursor: pointer;
}

.header-nav a.active,
.header-nav a:hover {
    background-color: var(--base-soft);
    color: var(--base);
}

.nav-account {
    position: relative;
    flex-shrink: 0;
    margin-left: 1rem;
}

.nav-account-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    border-radius: 50%;
    cursor: pointer;
    line-height: 0;
}

.nav-account-btn:hover .nav-avatar,
.nav-account-btn:focus-visible .nav-avatar,
.nav-account.is-open .nav-avatar {
    box-shadow: 0 0 0 3px var(--base-ring);
}

.nav-account-btn:focus {
    outline: none;
}

.nav-account-btn:focus-visible {
    outline: 2px solid var(--base);
    outline-offset: 3px;
}

.nav-avatar {
    display: block;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--base-soft);
}

.nav-account-menu {
    display: none;
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 0;
    z-index: 1100;
    width: 20rem;
    padding: 0.75rem 0 0.35rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    box-shadow: 0 8px 28px var(--base-shadow-float);
    text-align: center;
}

.nav-account.is-open .nav-account-menu {
    display: block;
}

.nav-account-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem 1.25rem 1rem;
}

.nav-account-menu-avatar {
    display: block;
    width: 4.5rem;
    height: 4.5rem;
    border-radius: 50%;
    object-fit: cover;
    background: var(--base-soft);
    margin-bottom: 0.75rem;
}

.nav-account-name {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.15rem;
    font-weight: 400;
    color: var(--base);
    margin: 0;
    line-height: 1.3;
}

.nav-account-email {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.85rem;
    color: var(--muted);
    margin: 0.2rem 0 0;
    line-height: 1.3;
    word-break: break-word;
}

.nav-account-email:empty {
    display: none;
    margin: 0;
}

.nav-account-links {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--border);
    margin-top: 0.75rem;
    padding: 0.35rem 0.5rem;
    text-align: left;
}

.header-nav .nav-account-links a {
    display: block;
    width: 100%;
    padding: 0.7rem 0.9rem;
    margin: 0;
    border-radius: 0.65rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--base);
}

.header-nav .nav-account-links a:hover,
.header-nav .nav-account-links a:focus-visible {
    background-color: var(--base-soft);
    color: var(--base);
}

.header-nav .nav-account-logout {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
    gap: 0;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
}

.header-nav .nav-account-links .nav-account-logout button {
    display: block;
    width: 100%;
    padding: 0.7rem 0.9rem;
    margin: 0;
    border: none;
    border-radius: 0.65rem;
    background: none;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: inherit;
    color: var(--base);
    cursor: pointer;
}

.header-nav .nav-account-links .nav-account-logout button:hover,
.header-nav .nav-account-links .nav-account-logout button:focus-visible {
    background-color: var(--base-soft);
    color: var(--base);
}

/* Page layout */
.main-layout {
    display: flex;
    flex-direction: row;
    flex: 1;
    min-height: 0;
    background: var(--bg);
}

main#content {
    flex: 1;
    padding: 2rem;
    background: var(--surface);
    border-radius: 8px;
    margin: 0.5rem;
    box-shadow: 0 2px 8px var(--base-soft);
    min-width: 0;
}

/* Readable measure for text pages. Marketing (.home) stays tighter. */
.page-content {
    max-width: 48rem;
    margin: 0 auto;
}

/* Unit calculator */
.calculator-page {
    max-width: 48rem;
}

.calculator-lead {
    color: var(--charcoal);
    margin: 0.5rem 0 1.5rem;
    line-height: 1.6;
}

.calculator-form label {
    display: block;
    margin-bottom: 0.5rem;
}

.calculator-form input[type="text"] {
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
}

.unit-complete-list,
.fn-complete-list {
    position: fixed;
    z-index: 40;
    max-height: 16rem;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 0.3rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 8px 24px var(--base-shadow-menu);
}

.unit-complete-group,
.fn-complete-group {
    padding: 0.35rem 0.55rem 0.15rem;
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.unit-complete-option,
.fn-complete-option {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
    width: 100%;
    margin: 0;
    padding: 0.35rem 0.55rem;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: var(--charcoal);
    font: inherit;
    font-weight: 400;
    text-align: left;
    box-shadow: none;
}

.unit-complete-option:hover,
.unit-complete-option.is-active,
.fn-complete-option:hover,
.fn-complete-option.is-active {
    background: var(--base-soft);
    color: var(--base);
}

.unit-complete-symbol,
.fn-complete-name {
    font-size: 0.85rem;
}

.unit-complete-dim,
.fn-complete-sig {
    color: var(--muted);
    font-size: 0.75rem;
}

.unit-complete-option.is-active .unit-complete-dim,
.unit-complete-option:hover .unit-complete-dim,
.fn-complete-option.is-active .fn-complete-sig,
.fn-complete-option:hover .fn-complete-sig {
    color: var(--base);
}

.calculator-result {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    margin: 1.25rem 0 0;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: 6px;
}

.calculator-result-row {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem 0.75rem;
}

.calculator-result-label {
    font-weight: 600;
    color: var(--base);
    min-width: 5.5rem;
}

.calculator-result-value {
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--charcoal);
}

.calculator-result-unit {
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    font-size: 1.15rem;
    color: var(--base);
}

.calculator-result-formula {
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    font-size: 1.1rem;
    color: var(--charcoal);
}

.calculator-result-error {
    background: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.calculator-result-error .calculator-result-label,
.calculator-result-error .calculator-result-value,
.calculator-result-error .calculator-result-unit,
.calculator-result-error .calculator-result-formula,
.calculator-result-error .calculator-result-message {
    color: inherit;
}

.calculator-result-message {
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    font-size: 1.1rem;
}

.calculator-guide {
    margin-top: 2.5rem;
}

.calculator-guide h2 {
    margin-bottom: 0.75rem;
}

.calculator-guide ul {
    color: var(--charcoal);
    line-height: 1.7;
    padding-left: 1.25rem;
}

.calculator-guide li {
    margin-bottom: 0.5rem;
}

.calculator-guide ul ul {
    margin: 0.4rem 0 0.25rem;
    padding-left: 1.25rem;
}

.calculator-guide ul ul li {
    margin-bottom: 0.25rem;
}

.calculator-examples {
    margin-top: 1rem;
}

.calculator-syntax {
    margin-top: 2.75rem;
    padding-top: 0.25rem;
}

.calculator-syntax h2 {
    margin-bottom: 0.75rem;
}

.calculator-syntax-lead {
    color: var(--charcoal);
    line-height: 1.7;
    margin: 0 0 1.5rem;
}

.calculator-syntax-cards {
    margin-bottom: 1rem;
}

.calculator-syntax .calculator-guide {
    margin-top: 1.75rem;
}

.calculator-syntax .calculator-guide h3 {
    margin: 1.5rem 0 0.65rem;
    font-size: 1.05rem;
}

.calculator-syntax .calculator-guide h3:first-child {
    margin-top: 0;
}

.calculator-units,
.calculator-functions {
    margin-top: 2.75rem;
    padding-top: 0.25rem;
}

.calculator-units h2,
.calculator-functions h2 {
    margin-bottom: 0.75rem;
}

.calculator-units-lead {
    color: var(--charcoal);
    margin: 0 0 1.25rem;
    line-height: 1.6;
}

.calculator-units-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem 1rem;
}

.calculator-units-dim {
    padding: 0.85rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
}

.calculator-units-dim h3 {
    margin: 0 0 0.45rem;
    font-size: 0.98rem;
}

.calculator-units-dim-formula {
    font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    font-size: 0.88em;
    font-weight: 500;
    color: var(--base);
}

.calculator-units-symbols {
    margin: 0;
    line-height: 1.55;
    color: var(--charcoal);
    font-size: 0.92rem;
}

.calculator-units-symbols code {
    font-size: 0.92em;
    padding: 0;
    background: none;
}

.features,
.tech-stack {
    margin-top: 2rem;
}

.features h2,
.tech-stack h2 {
    text-align: left;
    margin-bottom: 0.75rem;
}

.features ul,
.tech-stack ul {
    color: var(--charcoal);
    line-height: 1.7;
    padding-left: 1.25rem;
}

.features li,
.tech-stack li {
    margin-bottom: 0.5rem;
}

/* Home pitch */
.home {
    max-width: 40rem;
}

.home-hero {
    margin-bottom: 0.5rem;
}

.home-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0 auto 2.25rem;
    text-align: center;
}

.home-logo {
    display: block;
    width: 12rem;
    height: auto;
    margin: 0;
}

.home-name {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 3.15rem;
    font-weight: 400;
    color: var(--base);
    letter-spacing: -0.02em;
    line-height: 1;
    margin: 0.75rem 0 0;
}

.home-name span {
    color: var(--charcoal);
}

.home-tagline {
    font-family: Palatino, 'Palatino Linotype', 'Book Antiqua', Georgia, serif;
    font-style: italic;
    font-size: 1.05rem;
    font-weight: 400;
    color: var(--charcoal);
    letter-spacing: 0.01em;
    line-height: 1.35;
    margin: 0.45rem 0 0;
}

.home-lead {
    font-size: 1.1rem;
    margin-top: 0;
}

.home-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.85rem 1.25rem;
    margin-top: 1.5rem;
}

a.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    min-width: 14rem;
    min-height: 2.85rem;
    padding: 0.8rem 1.75rem;
    background: var(--base);
    color: #fff;
    text-decoration: none;
    border: none;
    border-radius: 6px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.2;
    box-shadow: 0 2px 8px var(--base-shadow-cta);
    transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}

a.cta-btn:hover,
a.cta-btn:focus-visible {
    background: var(--base-hover);
    color: #fff;
    text-decoration: none;
    box-shadow: 0 4px 12px var(--base-shadow-cta-hover);
    transform: translateY(-1px);
}

.cta-alt {
    margin: 0;
    color: var(--muted);
}

.home code,
.calculator-syntax code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9em;
    background: var(--base-soft);
    color: var(--base);
    padding: 0.1em 0.4em;
    border-radius: 4px;
}

.home-close {
    margin-top: 2.5rem;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border);
}

/* Landing page */
.home.landing {
    max-width: 52rem;
}

.landing-hero {
    text-align: center;
}

.landing-hero h1,
.landing-section h2 {
    text-align: center;
}

.landing-trust {
    margin: 0.75rem 0 0;
    font-size: 0.95rem;
    color: var(--muted);
    text-align: center;
}

.landing-cta {
    margin-top: 1.75rem;
}

a.cta-btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    min-width: 14rem;
    min-height: 2.85rem;
    padding: 0.8rem 1.75rem;
    background: transparent;
    color: var(--base);
    text-decoration: none;
    border: 2px solid var(--base);
    border-radius: 6px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.2;
    transition: background 0.2s, color 0.2s, transform 0.2s;
}

a.cta-btn-outline:hover,
a.cta-btn-outline:focus-visible {
    background: var(--base-soft);
    color: var(--base-hover);
    text-decoration: none;
    transform: translateY(-1px);
}

.landing-section {
    margin-top: 3rem;
    padding-top: 0.25rem;
}

.landing-section h2 {
    margin-bottom: 1.25rem;
}

.landing-demo {
    padding: 1.5rem 1.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--base-shadow-form);
}

.landing-demo-lead {
    margin: 0 0 1.25rem;
    text-align: center;
    color: var(--charcoal);
}

.landing-demo-form {
    margin-bottom: 0.75rem;
}

.landing-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.landing-example-chip {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.85rem;
    padding: 0.35rem 0.65rem;
    background: var(--base-soft);
    color: var(--base);
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
}

.landing-example-chip:hover,
.landing-example-chip:focus-visible {
    background: var(--base-soft-2);
    border-color: var(--base-tint);
    outline: none;
}

.landing-demo-more {
    margin: 1rem 0 0;
    text-align: center;
    font-size: 0.95rem;
}

.landing-demo-cta {
    margin-top: 1.5rem;
    text-align: center;
}

.landing-demo-cta h2 {
    margin-bottom: 1rem;
    text-align: center;
}

.landing-cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.landing-cards.calculator-syntax-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.landing-card {
    padding: 1.25rem 1.35rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.landing-card h3 {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.15rem;
    font-weight: 400;
    color: var(--base);
    margin: 0 0 0.65rem;
}

.landing-card p {
    margin: 0 0 0.65rem;
    font-size: 0.98rem;
    line-height: 1.55;
}

.landing-card p:last-child {
    margin-bottom: 0;
}

.landing-card-example {
    margin-top: 0.85rem;
    font-size: 0.92rem;
}

.landing-audience {
    text-align: center;
}

.landing-audience-lead {
    max-width: 36rem;
    margin: 0 auto 1.25rem;
}

.landing-audience-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.65rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.landing-audience-tags li {
    padding: 0.4rem 0.9rem;
    background: var(--base-soft);
    color: var(--base);
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
}

.landing-status {
    padding: 1.25rem 1.5rem;
    background: var(--base-soft);
    border-radius: 8px;
    border-left: 4px solid var(--base);
}

.landing-status p {
    margin: 0;
    font-size: 0.98rem;
    line-height: 1.6;
}

.landing-close {
    text-align: center;
}

.landing-close h2,
.landing-close p {
    text-align: center;
}

.interest-form-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Messages */
.msg_error,
.error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    border-left: 4px solid #a33;
    border-radius: 6px;
    padding: 0.75rem 1rem;
    margin: 0 0 1rem;
    color: #721c24;
    text-align: center;
}

.msg_error a,
.error a {
    color: var(--link);
    font-weight: 600;
}

.msg_warning {
    background-color: #fff8e6;
    border: 1px solid #f0e0b0;
    border-left: 4px solid #b8860b;
    border-radius: 6px;
    padding: 0.75rem 1rem;
    margin: 0 0 1rem;
    text-align: center;
}

.msg_info {
    background-color: var(--base-soft);
    border: 1px solid #d4dae9;
    border-left: 4px solid var(--base);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    margin: 0 0 1rem;
    text-align: center;
}

.msg_success,
.success {
    background-color: var(--base-soft);
    border: 1px solid #d4dae9;
    border-left: 4px solid var(--base);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    margin: 0 0 1rem;
    color: var(--base);
    text-align: center;
}

.msg_none {
    display: none;
}

/* Forms */
form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    background: var(--surface);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--base-shadow-form);
    max-width: var(--form-max-width);
    width: 100%;
    margin: 0 auto;
}

.form-fields {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    column-gap: 1rem;
    row-gap: 1.25rem;
    align-items: center;
}

.form-fields>.form-actions {
    grid-column: 1 / -1;
}

.form-fields>.form-agree {
    grid-column: 2;
}

.form-group {
    margin-bottom: 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.form-fields .form-group {
    display: contents;
}

.form-group label {
    display: inline-block;
    text-align: left;
    font-weight: 600;
    color: var(--base);
    min-width: 120px;
    flex-shrink: 0;
    margin-bottom: 0;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    display: block;
    flex: 1;
    min-width: 0;
    width: 100%;
    box-sizing: border-box;
}

.form-inline-row {
    display: flex;
    gap: 0.75rem;
    align-items: stretch;
}

.form-inline-row input[type="text"],
.form-inline-row input[type="email"],
.form-inline-row input[type="password"] {
    flex: 1;
    min-width: 0;
    width: auto;
    box-sizing: border-box;
}

.form-inline-row button {
    margin-top: 0;
    flex-shrink: 0;
    white-space: nowrap;
}

label {
    font-weight: 600;
    color: var(--base);
    margin-bottom: 0.4rem;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
select,
textarea {
    padding: 0.65rem 1rem;
    border: 1.5px solid var(--border);
    border-radius: 5px;
    font-size: 1rem;
    background: var(--bg);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--base);
    box-shadow: 0 0 0 2px var(--base-ring);
    background: var(--surface);
}

button,
input[type="submit"] {
    background: var(--base);
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 0.7rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 0.5rem;
}

button:hover,
input[type="submit"]:hover {
    background: var(--base-hover);
}

.login-form {
    max-width: var(--form-max-width);
    width: 100%;
    margin: 1.5rem auto 0;
}

.login-form h2 {
    text-align: center;
}

.login-form>p:not(.form-links) {
    text-align: center;
    color: var(--charcoal);
    margin: 0 0 1rem;
    line-height: 1.5;
}

.form-agree {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    margin: 0;
}

.form-agree input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    margin: 0.2rem 0 0;
    flex-shrink: 0;
    accent-color: var(--base);
}

.form-agree label {
    font-weight: 500;
    margin-bottom: 0;
    line-height: 1.4;
    color: var(--charcoal);
}

.form-agree a {
    color: var(--link);
}

.form-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1rem 0 0;
}

.workbook-create {
    max-width: var(--form-max-width);
    width: 100%;
    margin: 1.5rem 0 0;
}

/* Buttons */
.btn-primary {
    background: var(--base);
    color: white;
}

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

.btn-secondary {
    background: var(--charcoal);
    color: white;
}

.btn-secondary:hover {
    background: #333333;
}

.btn-danger {
    background: #a33;
    color: white;
}

.btn-danger:hover {
    background: #822;
}

.btn-icon {
    font-size: 1.1rem;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--base-shadow);
}

/* Workbooks */
.workbook-list {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0;
}

.workbook-list li {
    margin: 0.35rem 0;
}

.workbook-item-view {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 0.35rem 0.5rem 0;
    background: var(--bg);
    border-radius: 4px;
    box-shadow: 0 1px 2px var(--base-soft);
}

.workbook-list a {
    display: block;
    flex: 1;
    min-width: 0;
    padding: 0.45rem 1rem;
    background: transparent;
    border-radius: 4px;
    text-decoration: none;
    color: var(--link);
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.25;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.workbook-list a:hover {
    background: var(--base-soft);
    color: var(--base);
}

.workbook-item-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
}

.workbook-item-view>button {
    margin-left: auto;
}

.workbook-item-view button {
    margin-top: 0;
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
    line-height: 1.2;
    min-width: 5.5rem;
}

.workbook-delete-form,
.workbook-rename-form {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.4rem;
    background: none;
    padding: 0;
    border: none;
    border-radius: 0;
    box-shadow: none;
    max-width: none;
    width: auto;
    margin: 0;
}

.workbook-rename-form {
    display: none;
}

.workbook-item.is-renaming .workbook-item-view {
    display: none;
}

.workbook-item.is-renaming .workbook-rename-form {
    display: flex;
}

.workbook-empty {
    color: var(--muted);
    margin-top: 1.5rem;
}

/* User account */
.user-account-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.account-card {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--base-soft);
    padding: 2rem;
    border: 1px solid var(--border);
}

.account-header-card {
    background: linear-gradient(135deg, var(--base) 0%, var(--base-light) 100%);
    color: white;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    position: relative;
    overflow: hidden;
    padding: 1rem 1.5rem;
}

.account-header-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    z-index: 1;
}

.account-avatar-section {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.account-avatar {
    position: relative;
    display: block;
    width: 6.5rem;
    height: 6.5rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s ease;
    cursor: pointer;
}

.account-avatar:hover {
    transform: scale(1.05);
}

.account-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s ease;
    cursor: pointer;
}

.account-avatar:hover .avatar-overlay {
    opacity: 1;
}

.avatar-edit-icon {
    font-size: 1.15rem;
    color: white;
}

.account-header-info {
    flex: 1;
    z-index: 2;
    min-width: 0;
}

.account-username {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1.85rem;
    font-weight: 400;
    margin: 0 0 0.35rem 0;
    color: white;
}

.account-header-card .account-stats {
    gap: 1.25rem;
}

.account-header-card .stat-label {
    font-size: 0.8rem;
}

.account-header-card .stat-value {
    font-size: 0.95rem;
}

.account-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    font-weight: 500;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
}

.role-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.role-admin {
    background: var(--base);
    color: white;
}

.role-free_user {
    background: var(--charcoal);
    color: white;
}

.role-paid_user {
    background: var(--base-light);
    color: white;
}

.role-cancelled,
.role-invalid {
    background: var(--border);
    color: var(--charcoal);
}

.card-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--base);
    margin: 0 0 1.5rem 0;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--bg);
}

.title-icon {
    font-size: 1.25rem;
}

.info-value-with-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.info-value-with-action button {
    flex-shrink: 0;
    margin-top: 0;
}

.info-item .info-editor {
    display: none;
}

.info-editor form {
    max-width: none;
    width: 100%;
    margin: 0;
}

.info-item.is-editing .info-view {
    display: none;
}

.info-item.is-editing .info-editor {
    display: block;
}

.message-display {
    margin: 1rem 0;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.form-actions button {
    margin-top: 0;
}

.logout-section {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
    padding: 1rem;
}

.info-stack {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-label {
    font-weight: 600;
    color: var(--muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1.1rem;
    color: var(--charcoal);
    font-weight: 500;
}

.site-footer {
    margin-top: auto;
    padding: 1.25rem 2rem;
    background: var(--surface);
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.875rem;
    line-height: 1.4;
}

.site-footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem 2rem;
    max-width: 72rem;
    margin: 0 auto;
}

.site-footer-copy {
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.5rem;
    color: var(--muted);
}

.site-footer-brand {
    display: inline-flex;
    align-items: center;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 1rem;
    font-weight: 400;
    color: var(--base);
    letter-spacing: -0.02em;
}

.site-footer-logo {
    display: block;
    height: 1.25rem;
    width: auto;
    flex-shrink: 0;
    margin-right: 0.4rem;
}

.site-footer-brand span {
    color: var(--charcoal);
}

.site-footer-brand .site-footer-name {
    color: inherit;
}

.site-footer-sep {
    color: var(--border);
    user-select: none;
}

.site-footer-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 1.25rem;
}

.site-footer-nav a {
    color: var(--muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s ease;
}

.site-footer-nav a:hover,
.site-footer-nav a:focus-visible {
    color: var(--base);
    text-decoration: underline;
    text-underline-offset: 0.15em;
}

/* Admin dashboard */
main#content:has(.admin-layout) {
    padding: 0;
}

.admin-layout {
    display: flex;
    align-items: stretch;
    position: relative;
    width: 100%;
    min-height: 24rem;
}

.admin-nav {
    position: relative;
    flex: 0 0 15rem;
    width: 15rem;
    min-width: 0;
    overflow: visible;
    background: var(--bg);
    border-right: 1px solid var(--border);
    transition: flex-basis 0.22s ease, width 0.22s ease, border-color 0.22s ease;
}

.admin-nav-panel {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.admin-nav-toggle {
    position: absolute;
    top: 1.15rem;
    right: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
    margin: 0;
    background: var(--surface);
    color: var(--base);
    border: 1px solid var(--border);
    border-radius: 50%;
    box-shadow: 0 1px 4px var(--base-shadow);
    transform: translateX(50%);
}

.admin-nav-toggle:hover,
.admin-nav-toggle:focus-visible {
    background: var(--base-soft);
    color: var(--base-hover);
}

.admin-nav-toggle-icon {
    display: block;
    width: 1rem;
    height: 1rem;
    transition: transform 0.22s ease;
}

.admin-nav-toggle-icon path {
    fill: none;
    stroke: currentColor;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.admin-nav-links {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    width: 15rem;
    padding: 1.25rem 1rem 1.25rem 0.85rem;
    box-sizing: border-box;
}

.admin-nav-links a {
    display: block;
    padding: 0.55rem 0.75rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--base);
    font-weight: 500;
}

.admin-nav-links a:hover,
.admin-nav-links a:focus-visible {
    background: var(--base-soft);
    color: var(--base-hover);
}

.admin-nav-links a[aria-current="page"] {
    background: var(--base-soft-2);
    font-weight: 600;
}

.admin-layout.is-collapsed .admin-nav {
    flex-basis: 0;
    width: 0;
    border-right-color: transparent;
}

.admin-layout.is-collapsed .admin-nav-toggle-icon {
    transform: rotate(180deg);
}

.admin-main {
    flex: 1;
    min-width: 0;
    padding: 1.5rem 2rem;
}

.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
    gap: 1rem;
}

.admin-stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--base-soft);
    padding: 1.5rem;
}

.admin-stat-card h2 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
}

.admin-stat-count {
    font-size: 2.25rem;
    font-weight: 600;
    color: var(--base);
    margin: 0;
    line-height: 1.2;
}

.admin-stat-sub {
    color: var(--muted);
    margin: 0.4rem 0 0;
}

.admin-invite {
    margin-top: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--base-soft);
    padding: 1.5rem;
}

.admin-invite h2 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
}

.admin-invite-help {
    color: var(--muted);
    margin: 0 0 0.75rem;
}

.admin-invite-row {
    display: flex;
    gap: 0.75rem;
    align-items: stretch;
}

.admin-invite-row input {
    flex: 1;
    min-width: 0;
}

.admin-invite-copy {
    margin-top: 0;
    flex: 0 0 auto;
    white-space: nowrap;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    text-align: left;
    padding: 0.7rem 0.85rem;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.admin-table th {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--base);
}

.admin-table tbody tr:hover {
    background: var(--base-soft);
}

.admin-empty {
    color: var(--muted);
    margin-top: 0.5rem;
}

@media (min-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }

    .nav-menu {
        display: flex !important;
        position: static;
        opacity: 1;
        transform: none;
        background: none;
        box-shadow: none;
        padding: 0;
        margin-left: 2rem;
    }
}

@media (max-width: 768px) {
    .header-nav {
        padding: 0.75rem 1rem;
        flex-direction: row;
        align-items: center;
        gap: 0;
    }

    .nav-center {
        order: -1;
    }

    .nav-left {
        justify-content: flex-end;
        margin-left: auto;
        gap: 1rem;
    }

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

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--surface);
        flex-direction: column;
        align-items: stretch;
        margin-left: 0;
        padding: 1rem;
        box-shadow: 0 4px 8px var(--base-shadow);
        z-index: 1000;
        opacity: 0;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }

    .nav-menu.active {
        display: flex;
        opacity: 1;
        transform: translateY(0);
    }

    .nav-left-menu,
    .nav-right-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
        width: 100%;
    }

    .nav-left-menu:not(:last-child) {
        border-bottom: 1px solid var(--base-soft-2);
        padding-bottom: 1rem;
        margin-bottom: 1rem;
    }

    .header-nav a {
        font-size: 1rem;
        padding: 0.75rem 1rem;
        text-align: left;
        min-width: auto;
        width: 100%;
        border-radius: 4px;
        transition: background-color 0.2s;
    }

    .header-nav a:hover,
    .header-nav a:active {
        background-color: var(--base-soft);
    }

    .header-nav .nav-account-links a {
        width: 100%;
        min-width: 0;
        padding: 0.7rem 0.9rem;
        font-size: 0.95rem;
    }

    .header-nav a.logo-link {
        margin-right: 0;
        justify-content: flex-start;
        width: auto;
        padding: 0;
        gap: 0.5rem;
    }

    .logo {
        height: 2.35rem;
        width: auto;
    }

    .logo-name {
        font-size: 1.45rem;
    }

    .logo-tagline {
        display: none;
    }

    .nav-account {
        margin-left: 0.5rem;
        z-index: 1001;
    }

    .nav-account-menu {
        width: min(20rem, calc(100vw - 1.5rem));
    }

    .main-layout {
        flex-direction: column;
        margin: 0;
    }

    main#content {
        margin: 1rem;
        padding: 1.5rem;
        border-radius: 6px;
    }

    form {
        padding: 1.5rem;
        margin: 0 1rem;
    }

    .workbook-delete-form,
    .workbook-rename-form,
    .nav-account-logout {
        padding: 0;
        margin: 0;
    }

    .form-fields {
        grid-template-columns: 1fr;
        row-gap: 0.5rem;
    }

    .form-fields>.form-agree {
        grid-column: 1;
    }

    .form-fields .form-group input,
    .form-fields .form-group select,
    .form-fields .form-group textarea {
        margin-bottom: 0.75rem;
    }

    .form-group {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }

    .form-group label {
        min-width: auto;
        text-align: left;
    }

    .form-inline-row {
        flex-direction: column;
        align-items: stretch;
    }

    .form-inline-row input[type="text"],
    .form-inline-row input[type="email"],
    .form-inline-row input[type="password"] {
        width: 100%;
    }

    .account-header-card {
        flex-direction: column;
        text-align: center;
        gap: 0.875rem;
        padding: 1rem;
    }

    .account-avatar {
        width: 5.5rem;
        height: 5.5rem;
    }

    .account-username {
        font-size: 1.5rem;
    }

    .account-stats {
        justify-content: center;
    }

    .info-value-with-action {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .info-value-with-action button,
    .form-actions button,
    .form-inline-row button {
        width: 100%;
    }

    .form-actions {
        flex-direction: column;
    }

    input[type="text"],
    input[type="number"],
    input[type="email"],
    input[type="password"],
    select,
    textarea {
        padding: 0.75rem 1rem;
        font-size: 16px;
        min-height: 44px;
    }

    h1 {
        font-size: 1.75rem;
        margin-bottom: 0.75rem;
    }

    h2 {
        font-size: 1.5rem;
        margin-bottom: 0.75rem;
    }

    p {
        font-size: 1rem;
        line-height: 1.5;
    }

    .features ul,
    .tech-stack ul {
        padding-left: 1.5rem;
    }

    .features li,
    .tech-stack li {
        margin-bottom: 0.5rem;
        font-size: 1rem;
    }

    .home-hero {
        margin-bottom: 0.25rem;
    }

    .home-brand {
        margin-bottom: 1.75rem;
    }

    .home-logo {
        width: 9.5rem;
    }

    .home-name {
        font-size: 2.45rem;
        margin-top: 0.6rem;
    }

    .home-tagline {
        font-size: 0.8rem;
        margin-top: 0.3rem;
    }

    .home-cta {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }

    a.cta-btn {
        width: auto;
        min-width: 14rem;
        text-align: center;
    }

    .landing-cards,
    .landing-cards.calculator-syntax-cards {
        grid-template-columns: 1fr;
    }

    .calculator-units-grid {
        grid-template-columns: 1fr;
    }

    .landing-demo {
        padding: 1.25rem 1rem;
    }

    .landing-cta {
        flex-direction: column;
        align-items: center;
    }

    a.cta-btn-outline {
        width: auto;
        min-width: 14rem;
    }

    .nav-menu a {
        display: block;
        width: 100%;
        text-align: left;
        padding: 0.75rem 1rem;
        border-radius: 4px;
        transition: background-color 0.2s;
    }

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

    .nav-left-menu {
        margin-bottom: 1rem;
    }

    .nav-right-menu {
        padding-top: 0.5rem;
    }

    .site-footer {
        padding: 1.25rem 1rem;
    }

    .site-footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.85rem;
    }

    .admin-main {
        padding: 1.25rem 1.25rem 1.25rem 1.75rem;
    }
}

@media (max-width: 480px) {
    .header-nav {
        padding: 0.5rem 0.75rem;
    }

    .nav-left {
        gap: 0.5rem;
    }

    .header-nav a {
        font-size: 0.9rem;
        padding: 0.5rem 0.5rem;
        min-width: 70px;
    }

    .header-nav .nav-account-links a {
        min-width: 0;
        padding: 0.7rem 0.9rem;
        font-size: 0.95rem;
    }

    main#content {
        margin: 0.5rem;
        padding: 1rem;
    }

    .home-logo {
        width: 8rem;
    }

    .home-name {
        font-size: 2.05rem;
    }

    .home-tagline {
        font-size: 0.72rem;
    }

    form {
        padding: 1rem;
        margin: 0 0.5rem;
    }

    .workbook-delete-form,
    .workbook-rename-form,
    .nav-account-logout {
        padding: 0;
        margin: 0;
    }

    .account-header-card {
        padding: 0.875rem;
    }

    .account-username {
        font-size: 1.35rem;
    }

    .account-avatar {
        width: 5rem;
        height: 5rem;
    }
}

@media (hover: none) and (pointer: coarse) {
    .header-nav a:active {
        background-color: var(--base-soft-2);
    }

    button:active,
    input[type="submit"]:active {
        transform: scale(0.98);
    }

    .mobile-menu-toggle:active {
        transform: scale(0.95);
    }

    .mobile-menu-toggle:active .hamburger-line {
        background-color: var(--base-hover);
    }
}