:root {
--color-bg: #F8FAFC;
--color-surface: #FFFFFF;
--color-text: #0B1220;
--color-muted: #475569;
--color-border: #CBD5E1;
--color-primary: #1E3A8A;
--color-secondary: #0F766E;
--color-accent: #F97316;
--radius: 12px;
--space: clamp(12px, 2vw, 18px);
--maxw: 72rem;
--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
--font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", monospace;
--transition-fast: 150ms ease;
--transition-normal: 250ms ease;
}

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

* {
margin: 0;
padding: 0;
}

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

body {
font-family: var(--font-sans);
font-size: 1rem;
line-height: 1.7;
color: var(--color-text);
background-color: var(--color-bg);
min-height: 100vh;
display: flex;
flex-direction: column;
}

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

/* Typography - Swiss style */
h1, h2, h3, h4, h5, h6 {
font-weight: 700;
line-height: 1.25;
color: var(--color-text);
text-align: left;
margin-block-end: 0.5em;
}

h1 {
font-size: clamp(1.75rem, 4vw, 2.5rem);
letter-spacing: -0.02em;
margin-block-end: 1rem;
}

h2 {
font-size: clamp(1.35rem, 3vw, 1.75rem);
letter-spacing: -0.01em;
margin-block-start: 2rem;
border-bottom: 2px solid var(--color-primary);
padding-block-end: 0.25em;
}

h3 {
font-size: clamp(1.1rem, 2.5vw, 1.35rem);
margin-block-start: 1.5rem;
color: var(--color-secondary);
}

p {
margin-block-end: 1em;
max-width: 70ch;
}

a {
color: var(--color-primary);
text-decoration: underline;
text-decoration-thickness: 1px;
text-underline-offset: 2px;
transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

a:hover {
color: var(--color-secondary);
text-decoration-thickness: 2px;
}

a:focus-visible {
outline: 3px solid var(--color-accent);
outline-offset: 2px;
border-radius: 2px;
}

/* Header */
.site-header {
background-color: var(--color-surface);
border-bottom: 1px solid var(--color-border);
padding-block: var(--space);
position: sticky;
top: 0;
z-index: 100;
}

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

.site-name {
font-size: 1.25rem;
font-weight: 700;
color: var(--color-primary);
text-decoration: none;
letter-spacing: -0.01em;
}

.site-name:hover {
color: var(--color-secondary);
}

/* Navigation */
.nav-list {
list-style: none;
display: flex;
flex-wrap: wrap;
gap: calc(var(--space) * 1.5);
}

.nav-list a {
text-decoration: none;
font-weight: 500;
color: var(--color-text);
padding: 0.25em 0;
border-bottom: 2px solid transparent;
transition: border-color var(--transition-fast), color var(--transition-fast);
}

.nav-list a:hover {
color: var(--color-primary);
border-bottom-color: var(--color-primary);
}

.nav-list a[aria-current="page"] {
color: var(--color-primary);
border-bottom-color: var(--color-accent);
}

/* Breadcrumbs */
.breadcrumbs {
padding-block: var(--space);
font-size: 0.875rem;
}

.breadcrumbs ol {
list-style: none;
display: flex;
flex-wrap: wrap;
gap: 0.5em;
}

.breadcrumbs li:not(:last-child)::after {
content: "/";
margin-inline-start: 0.5em;
color: var(--color-muted);
}

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

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

.breadcrumbs [aria-current="page"] {
color: var(--color-text);
font-weight: 500;
}

/* Main content */
main {
flex: 1;
padding-block: calc(var(--space) * 2);
}

.content-grid {
display: grid;
grid-template-columns: 1fr;
gap: calc(var(--space) * 2);
}

.main-content {
background-color: var(--color-surface);
padding: calc(var(--space) * 1.5);
border-radius: var(--radius);
border: 1px solid var(--color-border);
}

.article-header {
margin-block-end: calc(var(--space) * 1.5);
padding-block-end: var(--space);
border-bottom: 1px solid var(--color-border);
}

/* Sidebar */
.sidebar {
background-color: var(--color-surface);
padding: calc(var(--space) * 1.5);
border-radius: var(--radius);
border: 1px solid var(--color-border);
height: fit-content;
}

.sidebar h2 {
font-size: 1.1rem;
margin-block-start: 0;
border-bottom: none;
padding-block-end: 0;
}

.sidebar h3 {
font-size: 1rem;
margin-block-start: 1.5rem;
}

.sidebar ul {
list-style: none;
margin-block-start: 0.5rem;
}

.sidebar li {
padding-block: 0.25em;
}

.sidebar a {
font-size: 0.9375rem;
}

/* Aside - Glossary */
.glossary-aside {
background-color: var(--color-bg);
border-left: 4px solid var(--color-secondary);
padding: var(--space);
margin-block: calc(var(--space) * 1.5);
border-radius: 0 var(--radius) var(--radius) 0;
}

.glossary-aside h3 {
margin-block-start: 0;
color: var(--color-secondary);
}

.glossary-aside dl {
margin-block-start: 1rem;
}

.glossary-aside dt {
font-weight: 600;
color: var(--color-primary);
margin-block-start: 0.75em;
}

.glossary-aside dd {
margin-inline-start: 0;
color: var(--color-muted);
font-size: 0.9375rem;
}

/* Blockquote */
blockquote {
border-left: 4px solid var(--color-accent);
padding: var(--space);
padding-inline-start: calc(var(--space) * 1.5);
margin-block: calc(var(--space) * 1.5);
margin-inline: 0;
background-color: var(--color-bg);
border-radius: 0 var(--radius) var(--radius) 0;
}

blockquote p {
font-style: italic;
color: var(--color-text);
font-size: 1.05rem;
margin-block-end: 0;
}

/* Tables */
.table-wrapper {
overflow-x: auto;
margin-block: calc(var(--space) * 1.5);
border: 1px solid var(--color-border);
border-radius: var(--radius);
}

table {
width: 100%;
border-collapse: collapse;
font-size: 0.9375rem;
background-color: var(--color-surface);
}

caption {
padding: var(--space);
font-weight: 600;
text-align: left;
background-color: var(--color-primary);
color: var(--color-surface);
}

th, td {
padding: calc(var(--space) * 0.75);
text-align: left;
border-bottom: 1px solid var(--color-border);
}

th {
background-color: var(--color-bg);
font-weight: 600;
color: var(--color-text);
white-space: nowrap;
}

tbody tr:hover {
background-color: var(--color-bg);
}

tbody tr:last-child td {
border-bottom: none;
}

/* Details/Summary Accordion */
details {
margin-block: var(--space);
border: 1px solid var(--color-border);
border-radius: var(--radius);
background-color: var(--color-surface);
overflow: hidden;
}

details[open] {
border-color: var(--color-primary);
}

summary {
padding: var(--space);
font-weight: 600;
cursor: pointer;
list-style: none;
display: flex;
align-items: center;
gap: 0.75em;
background-color: var(--color-bg);
transition: background-color var(--transition-fast);
}

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

summary::before {
content: "";
width: 0.5em;
height: 0.5em;
border-right: 2px solid var(--color-primary);
border-bottom: 2px solid var(--color-primary);
transform: rotate(-45deg);
transition: transform var(--transition-fast);
flex-shrink: 0;
}

details[open] summary::before {
transform: rotate(45deg);
}

summary:hover {
background-color: var(--color-border);
}

summary:focus-visible {
outline: 3px solid var(--color-accent);
outline-offset: -3px;
}

.details-content {
padding: var(--space);
padding-block-start: 0;
}

.details-content p:last-child {
margin-block-end: 0;
}

/* Footer */
.site-footer {
background-color: var(--color-surface);
border-top: 1px solid var(--color-border);
padding-block: calc(var(--space) * 1.5);
margin-block-start: auto;
}

.site-footer p {
text-align: center;
color: var(--color-muted);
font-size: 0.875rem;
margin-block-end: 0;
max-width: none;
}

/* Sections */
section {
margin-block: calc(var(--space) * 1.5);
}

section:first-of-type {
margin-block-start: 0;
}

/* Lists in content */
.main-content ul:not(.nav-list),
.main-content ol {
margin-block: 1em;
padding-inline-start: 1.5em;
}

.main-content li {
margin-block: 0.35em;
}

/* Medium screens - two column layout */
@media (min-width: 768px) {
.content-grid {
grid-template-columns: 1fr 280px;
}

.main-content {
padding: calc(var(--space) * 2);
}

.sidebar {
position: sticky;
top: calc(80px + var(--space));
}

h1 {
font-size: clamp(2rem, 4vw, 2.5rem);
}

.glossary-aside {
margin-inline-start: var(--space);
}
}

/* Large screens - enhanced table behavior */
@media (min-width: 1024px) {
.container {
padding-inline: calc(var(--space) * 2);
}

.content-grid {
grid-template-columns: 1fr 300px;
gap: calc(var(--space) * 3);
}

th {
position: sticky;
top: 0;
z-index: 10;
}

table {
font-size: 1rem;
}

th, td {
padding: var(--space);
}
}

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

*,
*::before,
*::after {
transition: none !important;
animation: none !important;
}
}

/* Print styles */
@media print {
.site-header,
.sidebar,
.breadcrumbs {
display: none;
}

.content-grid {
display: block;
}

.main-content {
border: none;
padding: 0;
}

a {
color: var(--color-text);
}

a[href]::after {
content: " (" attr(href) ")";
font-size: 0.8em;
color: var(--color-muted);
}
}