/* Leaf Specification Styles */

:root {
    --bg-primary: #f9f7f1;
    --bg-secondary: #f0ede3;
    --bg-code: #f5f3eb;
    --text-primary: #2a2620;
    --text-secondary: #6b6560;
    --text-link: #8b5e3c;
    --text-link-hover: #6b4a2e;
    --border-color: #d4cfc5;
    --shadow: rgba(0, 0, 0, 0.1);
    --content-width: 820px;
}

/* Dark theme colors (applied via media query or manual override) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #1a1816;
        --bg-secondary: #2a2622;
        --bg-code: #2a2622;
        --text-primary: #e8e5dc;
        --text-secondary: #a8a49a;
        --text-link: #c9a375;
        --text-link-hover: #d9b385;
        --border-color: #3a3632;
        --shadow: rgba(0, 0, 0, 0.3);
    }
}

/* Manual dark theme override */
:root[data-theme="dark"] {
    --bg-primary: #1a1816;
    --bg-secondary: #2a2622;
    --bg-code: #2a2622;
    --text-primary: #e8e5dc;
    --text-secondary: #a8a49a;
    --text-link: #c9a375;
    --text-link-hover: #d9b385;
    --border-color: #3a3632;
    --shadow: rgba(0, 0, 0, 0.3);
}

* {
    box-sizing: border-box;
}

/* Cross-document view transitions */
@view-transition {
    navigation: auto;
}

::view-transition-old(main-content) {
    animation: fade-out 0.4s ease-in both;
}

::view-transition-new(main-content) {
    animation: fade-in 0.4s ease-out 0.4s both;
}

@keyframes fade-out {
    from { opacity: 1; }
    to   { opacity: 0; }
}

@keyframes fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Keep the header static during transitions */
::view-transition-old(header),
::view-transition-new(header) {
    animation: none;
}

body {
    font-family: "Iowan Old Style", "Palatino Linotype", "URW Palladio L", Palatino, Georgia, serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    margin: 0;
    padding: 0;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 1rem;
}

/* Header */
header {
    flex-shrink: 0;
    background-color: var(--bg-primary);
    border-bottom: 2px solid var(--border-color);
    padding: 0.75rem 0;
    z-index: 100;
    view-transition-name: header;
}

header .container {
    padding: 0 1rem;
}

/* Content wrapper */
.content-wrapper {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
    view-transition-name: main-content;
}

/* Main content area */
main.container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    max-width: none;
}

/* Navigation */
nav {
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    row-gap: 0.5rem;
    flex: 1;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Nav logo */
nav a.nav-logo {
    display: flex;
    align-items: center;
    align-self: center;
    flex-shrink: 0;
    gap: 0.45rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
    text-decoration: none;
    margin-right: 0.25rem;
}

nav a.nav-logo:hover {
    color: var(--text-primary);
    opacity: 0.85;
}

nav a.nav-logo img {
    display: block;
    flex-shrink: 0;
}

/* Theme switcher */
.theme-switcher {
    margin-left: auto;
    display: flex;
    gap: 0.25rem;
    background-color: var(--bg-secondary);
    border-radius: 4px;
    padding: 0.15rem;
    border: 1px solid var(--border-color);
}

.theme-switcher button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.theme-switcher button:hover {
    color: var(--text-primary);
}

.theme-switcher button.active {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: 0 1px 2px var(--shadow);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    margin-top: 2rem;
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.75rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
}
h2 {
    font-size: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.4rem;
}
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin: 1.2rem 0;
    text-align: justify;
    hyphens: auto;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Code */
code {
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
    font-size: 0.88em;
    background-color: var(--bg-code);
    padding: 0.1rem 0.25rem;
    border-radius: 2px;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

pre {
    background-color: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    line-height: 1.5;
}

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

/* Lists */
ul, ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

li {
    margin: 0.5rem 0;
}

/* Tables */
table {
    border-collapse: collapse;
    width: 100%;
    margin: 2rem 0;
}

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

th {
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

tr:nth-child(even) td {
    background-color: rgba(0, 0, 0, 0.015);
}

/* Blockquotes */
blockquote {
    border-left: 3px solid var(--border-color);
    margin: 1.5rem 0 1.5rem 2rem;
    padding: 0 1.5rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Horizontal rules */
hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

/* Table of contents */
.toc {
    margin: 2rem 0 3rem 0;
    padding: 0;
}

.toc h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3rem;
    font-weight: 600;
}

.toc ul {
    list-style: none;
    padding-left: 0;
}

.toc li {
    margin: 0.5rem 0;
    line-height: 1.6;
}

.toc ul ul {
    padding-left: 1.5rem;
    margin-top: 0.25rem;
}

.toc a {
    color: var(--text-link);
    text-decoration: none;
}

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

/* Footer */
footer {
    margin-top: 5rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

/* Heading anchor links */
h2, h3, h4, h5, h6 {
    position: relative;
}

.heading-link {
    position: absolute;
    left: -1.5rem;
    opacity: 0;
    transition: opacity 0.2s ease;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85em;
    padding: 0.25rem;
    cursor: pointer;
}

h2:hover .heading-link,
h3:hover .heading-link,
h4:hover .heading-link,
h5:hover .heading-link,
h6:hover .heading-link {
    opacity: 1;
}

.heading-link:hover {
    color: var(--text-link);
}

.copy-notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.75rem 1.25rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px var(--shadow);
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
    z-index: 1000;
}

.copy-notification.show {
    opacity: 1;
}

/* Table of Contents - Left Sidebar */
.toc-sidebar {
    flex-shrink: 0;
    width: 250px;
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.toc-page-title {
    flex-shrink: 0;
    padding: 1rem 1rem 0.5rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.toc-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.5rem 1rem 1rem 2rem;
}

.toc-sidebar nav {
    display: block;
    margin: 0;
    font-size: 0.85rem;
}

.toc-sidebar ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.toc-sidebar li {
    margin: 0.4rem 0;
    line-height: 1.4;
}

.toc-sidebar ul ul {
    padding-left: 1rem;
    margin-top: 0.25rem;
}

.toc-sidebar a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    display: block;
}

.toc-sidebar a:hover {
    color: var(--text-link);
}

.toc-sidebar a.active {
    color: var(--text-link);
    font-weight: 500;
}

/* Landing page — two-column grid: intro left, code right */
body.landing main.container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem;
    overflow-y: auto;
}

body.landing main.container .landing-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

body.landing main.container #leaf3d {
    display: block;
    width: min(280px, 30vh) !important;
    height: min(280px, 30vh) !important;
}

body.landing main.container h1 {
    text-align: center;
    margin: 0;
}

body.landing main.container p {
    text-align: center;
    margin: 0;
}

body.landing main.container pre {
    align-self: center;
    text-align: left;
    margin: 0;
    width: 100%;
}

@media (max-width: 900px) {
    body.landing main.container {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding-top: 1rem;
    }

    body.landing main.container #leaf3d {
        width: min(200px, 25vh) !important;
        height: min(200px, 25vh) !important;
    }

    body.landing main.container pre {
        margin-top: 1rem;
    }
}

@media (max-width: 900px) and (max-height: 650px) {
    body.landing main.container {
        grid-template-rows: 1fr auto;
        align-items: stretch;
        overflow-y: auto;
    }

    body.landing main.container #leaf3d {
        display: none;
    }

    body.landing main.container .landing-left {
        justify-content: center;
    }
}

/* Wider content on larger screens */
@media (min-width: 1200px) {
    :root {
        --content-width: 1200px;
    }
}



/* Show TOC on large screens */
@media (min-width: 1400px) {
    .toc-sidebar {
        display: flex;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.35rem; }

    .heading-link {
        left: -1.2rem;
        font-size: 0.8em;
    }
}

@media (max-width: 700px) {
    nav {
        align-items: center;
    }

    .nav-links {
        gap: 0.75rem;
        font-size: 0.85rem;
        row-gap: 0.4rem;
    }

    .theme-switcher {
        display: none;
    }
}

/* Prev/next page navigation */
.page-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin: 3rem 0 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.page-nav a {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    text-decoration: none;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    max-width: 45%;
}

.page-nav a:hover {
    border-color: var(--text-link);
    background-color: var(--bg-secondary);
}

.page-nav-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.page-nav-title {
    color: var(--text-link);
    font-weight: 500;
}

.page-nav-next {
    margin-left: auto;
    text-align: right;
}

@media (max-width: 500px) {
    .page-nav {
        flex-direction: column;
    }

    .page-nav a {
        max-width: 100%;
    }

    .page-nav-next {
        margin-left: 0;
        text-align: left;
    }
}