:root {
    --color-primary: #e87922;
    --color-primary-light: #f4bc91;
    --color-primary-dark: #c96518;
    --color-link: #e87922;
    --color-link-hover: #0078aa;
    --color-border: #807468;
    --color-sidebar-bg: #e5e5e5;
    --color-text: #1a1a1a;
    --color-muted: #4a4a4a;
    --color-surface: #ffffff;
    --color-print: #66a93a;
    --color-pub: #d91a20;
    --color-innov: #0078aa;
    --font-body: "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1.25rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
}

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

html {
    font-size: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-surface);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--color-link-hover);
    text-decoration: underline;
}

h1, h2, h3 {
    line-height: 1.25;
    margin: 0 0 var(--space-md);
    font-weight: 600;
}

h1 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
}

h2, h3 {
    font-size: 1.125rem;
}

p {
    margin: 0 0 var(--space-md);
}

p:last-child {
    margin-bottom: 0;
}

.site-header {
    width: 100%;
    background: var(--color-surface);
    border-bottom: 2px solid #000;
}

.header-top {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-md) clamp(1rem, 4vw, 2.5rem);
    background: linear-gradient(180deg, #fafafa 0%, #f3f3f3 100%);
    border-bottom: 1px solid var(--color-border);
}

.brand {
    display: inline-flex;
    flex-direction: column;
    gap: 0.15rem;
    color: inherit;
    text-decoration: none;
}

.brand:hover {
    text-decoration: none;
    color: inherit;
}

.brand-name {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    line-height: 1;
}

.brand-tagline {
    font-size: 0.875rem;
    color: var(--color-muted);
    font-weight: 400;
}

.primary-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.primary-nav a {
    display: inline-block;
    padding: 0.5rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    border-bottom: 3px solid transparent;
}

.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom-color: var(--color-primary);
}

.affiliate-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem 2.5rem;
    padding: var(--space-sm) clamp(1rem, 4vw, 2.5rem);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.affiliate-nav a {
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.affiliate-nav .print-link { color: var(--color-print); }
.affiliate-nav .pubs-link { color: var(--color-pub); }
.affiliate-nav .innov-link { color: var(--color-innov); }

.date-bar {
    width: 100%;
    background: var(--color-primary);
    color: var(--color-primary-light);
    padding: var(--space-sm) clamp(1rem, 4vw, 2.5rem);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.site-main {
    width: 100%;
    padding: var(--space-lg) clamp(1.25rem, 5vw, 4rem) var(--space-xl);
}

.layout {
    display: grid;
    grid-template-columns: minmax(240px, 22%) 1fr;
    gap: clamp(1.25rem, 3vw, 3rem);
    align-items: start;
    width: 100%;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.sidebar-card {
    background: var(--color-sidebar-bg);
    border-top: 6px solid var(--color-primary);
    border-right: 2px solid #000;
    border-bottom: 2px solid #000;
    padding: var(--space-md);
}

.sidebar-card:last-child {
    border-bottom: 6px solid var(--color-primary);
}

.sidebar-card h2 {
    margin-bottom: var(--space-sm);
    text-align: center;
}

.sidebar-card figure {
    margin: 0;
    text-align: center;
}

.sidebar-card img {
    margin: 0 auto;
    border-radius: 4px;
}

.content-panel {
    min-width: 0;
}

.content-body {
    padding: var(--space-md) 0;
}

.content-body ul {
    margin: 0 0 var(--space-md);
    padding-left: 1.25rem;
}

.content-body li {
    margin-bottom: var(--space-xs);
}

.order-methods {
    display: grid;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.order-method {
    padding: var(--space-md);
    background: #fafafa;
    border-left: 4px solid var(--color-primary);
    border-radius: 0 4px 4px 0;
}

.order-method strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--color-text);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.contact-item {
    padding: var(--space-md);
    background: #fafafa;
    border-top: 3px solid var(--color-primary);
    border-radius: 0 0 4px 4px;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--color-primary);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.site-footer {
    width: 100%;
    background: var(--color-primary);
    color: #fff;
    padding: var(--space-md) clamp(1rem, 4vw, 2.5rem);
    font-size: 0.875rem;
}

.site-footer a {
    color: #fff;
    font-weight: 600;
}

.site-footer a:hover {
    color: #fff;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .header-top {
        flex-direction: column;
        align-items: flex-start;
    }

    .primary-nav {
        width: 100%;
        flex-direction: column;
        gap: 0;
    }

    .primary-nav a {
        padding: 0.65rem 0;
        border-bottom: 1px solid #e8e8e8;
    }

    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        order: 2;
    }

    .content-panel {
        order: 1;
    }
}

.flash {
    padding: var(--space-sm) clamp(1rem, 4vw, 2.5rem);
    font-weight: 600;
}

.flash-success {
    background: #e8f5e9;
    color: #1b5e20;
}

.flash-error {
    background: #ffebee;
    color: #b71c1c;
}

.button {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.7rem 1.2rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
}

.button:hover {
    background: var(--color-primary-dark);
    color: #fff;
    text-decoration: none;
}

.button-small {
    padding: 0.45rem 0.8rem;
    font-size: 0.9rem;
}

.button-secondary {
    background: #666;
}

.cart-link {
    font-weight: 700;
}

.shop-section {
    margin-bottom: var(--space-xl);
}

.shop-section-header {
    margin-bottom: var(--space-md);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-md);
}

.product-card {
    border: 1px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
    background: #fff;
}

.product-card-image img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.product-card-body {
    padding: var(--space-md);
}

.product-card-body h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.product-price {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.product-meta {
    color: var(--color-muted);
    font-size: 0.9rem;
}

.add-to-cart-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: end;
    margin-top: var(--space-md);
}

.add-to-cart-form input[type="number"] {
    width: 90px;
    padding: 0.5rem;
}

.cart-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-md) 0;
}

.cart-table th,
.cart-table td {
    border-bottom: 1px solid #e5e5e5;
    padding: 0.75rem;
    text-align: left;
    vertical-align: top;
}

.cart-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.checkout-layout h2 {
    margin-top: 0;
}

.checkout-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-lg);
}

.checkout-items {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-md);
}

.checkout-items li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

.checkout-totals p {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.checkout-total {
    font-size: 1.125rem;
    font-weight: 700;
}

.checkout-form label {
    display: block;
    margin-top: 0.75rem;
    font-weight: 600;
}

.checkout-form input,
.checkout-form textarea {
    width: 100%;
    padding: 0.6rem 0.7rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    margin-top: 0.25rem;
}

.checkout-inline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.checkbox-row input {
    width: auto;
    margin: 0;
}

@media (max-width: 768px) {
    .checkout-grid {
        grid-template-columns: 1fr;
    }
}