:root {
    /* Spacing scale (8px base unit) */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 1.5rem;   /* 24px */
    --space-lg: 2rem;     /* 32px */
    --space-xl: 3rem;     /* 48px */

    /* Colors */
    --color-green-primary: #00ff66;
    --color-orange-primary: #ff8c00;
    --color-orange-accent: #ff6600;
    --color-orange-light: #ff9933;
    --color-text-primary: #c5d1cf;
    --color-text-dim: #6b7975;
    --color-bg-dark: #0d1410;
    --color-bg-medium: #1a2420;
    --color-bg-darker: #0f1814;
    --color-border: #2d3d35;
}

.lambda-logo {
    color: var(--color-orange-accent);
    font-weight: bold;
    font-size: 1.3em;
    text-shadow: 0 0 15px rgba(255, 102, 0, 0.8);
    margin-right: var(--space-sm);
    display: inline-block;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 70ch;
    margin: auto;
    padding: 0 var(--space-md);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-dark);
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
    font-family: monospace;
}

header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
}

header h1 {
    margin: 0;
}

header nav ul {
    margin: 0;
    padding: 0 !important;
}

header nav ul li {
    display: inline;
    font-weight: bold;
}

header nav ul li:not(:first-child) {
    margin-left: 0.5rem;
}

header nav ul li::before {
    content: none;
}

header nav ul li a {
    position: relative;
    padding-bottom: 0.2rem;
}

header nav ul li a.active {
    color: var(--color-orange-primary);
    border-bottom: 3px solid var(--color-orange-accent);
}

header nav ul li a:focus {
    outline: 2px solid var(--color-orange-primary);
    outline-offset: 2px;
}

main {
    flex-grow: 1;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    font-weight: 700;
    letter-spacing: 0.5px;
}

h1 {
    font-size: 2rem;
    color: var(--color-orange-primary);
    text-shadow: 0 0 10px rgba(255, 140, 0, 0.5);
    border-left: none;
    padding-left: 0;
}

h2 {
    font-size: 1.5rem;
    color: var(--color-orange-primary);
    text-shadow: 0 0 10px rgba(255, 140, 0, 0.5);
    border-left: 4px solid var(--color-green-primary);
    padding-left: 0.75rem;
}

h3 {
    font-size: 1.25rem;
    color: var(--color-orange-primary);
    text-shadow: 0 0 8px rgba(255, 140, 0, 0.4);
    border-left: 3px solid var(--color-green-primary);
    padding-left: 0.75rem;
}

h4,
h5,
h6 {
    font-size: 1.1rem;
    color: var(--color-orange-light);
    text-shadow: 0 0 5px rgba(255, 140, 0, 0.3);
    border-left: 2px solid var(--color-green-primary);
    padding-left: 0.75rem;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: var(--space-lg) 0;
    border-radius: 2px;
    border: 2px solid var(--color-border);
    box-shadow: 0 0 20px rgba(0, 255, 100, 0.2);
}

a {
    color: var(--color-green-primary);
    text-decoration: none;
    text-shadow: 0 0 5px rgba(0, 255, 100, 0.3);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--color-orange-primary);
    text-decoration: none;
    text-shadow: 0 0 10px rgba(255, 140, 0, 0.6);
}

a:focus {
    outline: 2px solid var(--color-orange-primary);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Body content links should have underlines for accessibility */
main article a:not(h1 a):not(h2 a):not(h3 a):not(h4 a):not(h5 a):not(h6 a) {
    text-decoration: underline;
    text-decoration-color: rgba(0, 255, 100, 0.4);
    text-underline-offset: 0.2em;
}

main article a:not(h1 a):not(h2 a):not(h3 a):not(h4 a):not(h5 a):not(h6 a):hover {
    text-decoration: underline;
    text-decoration-color: rgba(255, 140, 0, 0.6);
}

code {
    font-family: monospace;
    font-size: 0.9em;
    background-color: var(--color-bg-medium);
    color: var(--color-green-primary);
    padding: 0.2rem 0.4rem;
    border-radius: 2px;
    border: 1px solid var(--color-border);
}

pre {
    overflow-x: auto;
    padding: var(--space-sm);
    margin: var(--space-md) 0;
    border-radius: 2px;
    background-color: var(--color-bg-darker);
    border: 2px solid var(--color-border);
    border-left: 4px solid var(--color-orange-accent);
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
}

pre code {
    background-color: transparent;
    border: none;
    padding: 0;
}

blockquote {
    border-left: 4px solid #ffcc00;
    background: repeating-linear-gradient(45deg,
            var(--color-bg-medium),
            var(--color-bg-medium) 10px,
            var(--color-bg-darker) 10px,
            var(--color-bg-darker) 20px);
    padding: var(--space-sm);
    margin: var(--space-md) 0;
    color: #ffcc00;
}

hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-green-primary), transparent);
    margin: var(--space-lg) 0;
    box-shadow: 0 0 10px rgba(0, 255, 100, 0.5);
}

/* Article spacing */
article {
    margin-bottom: var(--space-xl);
}

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

/* Article metadata (dates and tags) */
article time {
    display: inline-block;
    margin-right: var(--space-sm);
    color: var(--color-text-dim);
    font-size: 0.9em;
}

/* Tags on summary pages (inline format) */
article section {
    margin-top: var(--space-sm);
}

/* Read more link styling */
article section a[aria-label^="Read more"] {
    display: inline-block;
    margin-top: var(--space-sm);
    font-weight: bold;
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-green-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

article section a[aria-label^="Read more"]:hover {
    background-color: var(--color-orange-primary);
    border-color: var(--color-orange-primary);
    color: var(--color-bg-dark);
    text-shadow: none;
}

/* Tags section on single posts */
article footer {
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    /* border-top: 1px solid var(--color-border); */
}

article footer strong {
    color: var(--color-text-primary);
}

article footer #tags {
    padding-left: 0;
    margin-top: var(--space-xs);
}

article footer #tags li::before {
    margin-right: var(--space-xs);
}

ul {
    list-style: none;
    padding-left: var(--space-md);
}

ul li::before {
    content: "λ ";
    color: var(--color-orange-primary);
    font-weight: bold;
    margin-right: var(--space-xs);
}

::selection {
    background-color: var(--color-orange-primary);
    color: var(--color-bg-dark);
}

/* Sidebar */
aside {
    margin-top: var(--space-xl);
}

aside h2 {
    margin-top: 0;
    font-size: 1.3rem;
}

aside nav ul {
    margin-bottom: 0;
}

/* Page footer */
body > footer {
    margin-top: var(--space-xl);
    padding: var(--space-lg) 0;
    text-align: center;
    color: var(--color-text-dim);
    border-top: 1px solid var(--color-border);
}

/* Breadcrumbs styles */
.breadcrumbs {
    margin-bottom: var(--space-md);
    font-size: 1em;
    color: var(--color-text-primary);
}

.breadcrumbs ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
}

.breadcrumbs li::before {
    content: none;
}

.breadcrumbs a {
    color: var(--color-green-primary);
    text-decoration: none;
    text-shadow: 0 0 5px rgba(0, 255, 100, 0.3);
    transition: color 0.2s;
}

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

.breadcrumb-separator {
    margin: 0 0.5em;
    color: var(--color-text-dim);
    font-weight: normal;
}

.breadcrumbs span {
    color: var(--color-text-primary);
    font-weight: normal;
}