@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,100..800;1,100..800&family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined');

:root {
    /* Light Theme Colors (Default) */
    --color-background: #ffffff;
    --color-surface: #f5f5f5;
    --color-surface-secondary: rgba(234, 234, 234, 0.65);

    --color-primary: #4da6ff;
    --color-primary-hover: #66b3ff;
    --color-text: #212121;
    --color-text-secondary: #666666;
    --color-border: #dddddd;
    --color-border-secondary: #c4c4c4;
    --color-shadow: rgba(0, 0, 0, 0.1);

    --color-link: #0066cc;
    --color-link-hover: #0052a3;
    --color-link-subtle: #585858;

    --scroll-track: rgba(0,0,0,0.10);
    --scroll-thumb: rgba(0,0,0,0.25);
    --scroll-thumb-hover: rgba(0,0,0,0.28);
    --scroll-thumb-accent: var(--color-primary);
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --color-background: #1a1a1a;
    --color-surface: #2d2d2d;
    --color-surface-secondary: rgba(100, 100, 100, 0.65);

    --color-primary: #0066cc;
    --color-primary-hover: #0052a3;
    --color-text: #f0f0f0;
    --color-text-secondary: #b0b0b0;
    --color-border: #444444;
    --color-border-secondary: #5d5d5d;
    --color-shadow: rgba(0, 0, 0, 0.3);

    --color-link: #4da6ff;
    --color-link-hover: #66b3ff;
    --color-link-subtle: #bebebe;

    --scroll-track: rgba(255,255,255,0.10);
    --scroll-thumb: rgba(255,255,255,0.25);
    --scroll-thumb-hover: rgba(255,255,255,0.28);
    --scroll-thumb-accent: var(--color-primary);
}

/* Centralized Font Definitions */
:root {
    /* Font Families */
    --font-primary: 'JetBrains Mono', Roboto, monospace, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-monospace: 'JetBrains Mono', Roboto, monospace, 'Courier New', Courier, monospace;
    
    /* Font Sizes */
    --font-size-base: 16px;
    --font-size-small: 0.875rem;
    --font-size-large: 1.125rem;
    --font-size-h1: 2.5rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.5rem;
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    
    /* Line Heights */
    --line-height-base: 1.6;
    --line-height-heading: 1.2;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
}

/* Basic Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary), monospace;
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-heading);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);

    border-left: 4px solid var(--color-link);
    padding-left: 1rem;

    transition: border-left-color var(--transition-base);
}

h3 {
    font-size: var(--font-size-h3);

    margin-top: var(--spacing-xl);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

a i {
    line-height: inherit;
    vertical-align: middle;

    margin-left: var(--spacing-xs);
}

a i.material-symbols-outlined {
    font-size: 1.3em;
}

a i.symbol-line-start {
    vertical-align: top;

    margin-left: 0;
    margin-right: var(--spacing-xs);
}

/* Header Styles */
header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-xl);
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-direction: column;

    max-width: 1200px;
    margin: 0 auto;

    > * {
        width: 100%;
    }
}

.nav-logo {
    display: flex;
    justify-content: space-between;
    align-items: center;

    border-bottom: 1px solid var(--color-border);
    transition: border-bottom-color var(--transition-base);
}

.nav-logo h1 {
    margin-bottom: 0;
    font-size: var(--font-size-large);
}

.nav-logo h1 a {
    color: inherit;
    font-size: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

.nav-logo h1 a:hover {
    color: inherit;
    text-decoration: none;
}

#header-navbar {
    min-height: 30px;
}

.nav-menu {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--spacing-md);

    margin-top: var(--spacing-xs);
}

.nav-menu a {
    color: var(--color-link-subtle);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);

    text-decoration: none;
}

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

.dropdown {
    overflow: hidden;
}

.dropdown .dropdown-button {
    font-family: inherit;
    font-size: inherit;

    text-overflow: ellipsis;
}

.dropdown .dropdown-button i {
    vertical-align: middle;
}

.dropdown .dropdown-button i.material-symbols-outlined {
    font-size: 1.5em;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown .dropdown-content {
    display: none;
    position: absolute;

    min-width: 160px;
    padding: 5px 10px;

    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 8px var(--color-shadow);

    z-index: 1;
}

.dropdown .dropdown-content > a {
    display: block;

    margin-bottom: var(--spacing-xs);

    border-bottom: 2px dotted var(--color-border);
    transition: border-bottom-color var(--transition-fast);
}

.dropdown .dropdown-content > a:hover {
    border-bottom: 2px dotted var(--color-border-secondary);
}

.nav-menu > .dropdown .dropdown-button {
    font-weight: var(--font-weight-medium);

    color: var(--color-link-subtle);
    border: none;
    background-color: transparent;

    transition: color var(--transition-fast);
}

.nav-menu > .dropdown .dropdown-button:hover {
    color: var(--color-text);
}

.standout-button {
    color: #f0f0f0;
    border: 1px solid var(--color-border);
    background-color: var(--color-primary);

    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.standout-button:hover {
    background-color: var(--color-primary-hover);
}

label, input, select, textarea {
    color: var(--color-text);

    transition: background-color var(--transition-base), color var(--transition-base);
}

input, textarea, select {
    background-color: var(--color-surface-secondary);
}

/* Placeholder text */
::placeholder,
::-webkit-input-placeholder,
::-moz-placeholder,
:-ms-input-placeholder,
::-ms-input-placeholder {
    color: var(--color-link-subtle); /* Sets the placeholder text color to red */
    opacity: 1; /* Ensures full opacity, especially in Firefox */

    transition: opacity var(--transition-base), transform var(--transition-base), color var(--transition-base);
}

/* Theme Toggle Button */
.theme-svg {
    color: var(--color-text-secondary);
}

#theme-toggle {
    background-color: transparent;
    border: 0;
    padding: var(--spacing-xs);
    font-size: var(--font-size-large);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

#theme-toggle i.material-symbols-outlined {
    color: var(--color-link-subtle);

    transition: color var(--transition-fast);
}

#theme-toggle:hover i.material-symbols-outlined {
    color: var(--color-text);
}

#theme-toggle:active {
    transform: scale(0.9);
}


/* Main Content */
main {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-xl);
    min-height: calc(100vh - 200px);
}

/* Only 1st Headings in Main (Page Titles) */
main > h1 {
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);

    transition: border-bottom-color var(--transition-base)
}

section {
    background-color: var(--color-surface);

    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);

    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--color-shadow);
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

code {
    color: var(--color-text);
    background-color: var(--color-surface-secondary);

    padding: var(--spacing-xs);
    border-radius: var(--radius-md);

    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Footer Styles */
#footer-content {
    min-height: 262px;
}

footer {
    font-size: var(--font-size-small);

    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: center;
    color: var(--color-text-secondary);
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

footer p {
    margin-bottom: 0;
}

footer a {
    color: var(--color-link-subtle);
    font-weight: var(--font-weight-medium);
}

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

.footer-container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    position: relative;

    width: 100%;

    max-width: 1200px;
    margin: 0 auto;
}

.footer-nav {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: start;
    align-items: flex-start;

    width: 100%;
}

.nav-category {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;

    > li > h4 {
        transition: color var(--transition-base);
    }
}

.nav-category li {
    flex: 0 1 auto;
    margin: var(--spacing-xl);
}
.nav-category li h4 {
    color: var(--color-text);
}

.nav-list li {
    margin: var(--spacing-sm) 0 0 0;
}

.footer-end {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;

    width: 100%;

    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-secondary {
    color: var(--color-text-secondary);
}

.text-small {
    font-size: var(--font-size-small);
}

.text-large {
    font-size: var(--font-size-large);
}

.text-no-margin {
    margin: 0;
}

.no-style-list {
    text-align: start;
    list-style: none;
}

.medium-padding-left {
    padding-left: var(--spacing-md);
}

.large-spacing-list {
    > li {
        margin-bottom: var(--spacing-md);
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.sources-div {
    display: flex;
    flex-direction: column;
    justify-content: end;
    align-items: end;

    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-md);

    transition: border var(--transition-base);

    > p {
        transition: color var(--transition-base);
    }
}


@keyframes blink-highlight {
    0% { background-color: var(--color-link-subtle); }
    30% { background-color: var(--color-surface); }
    50% { background-color: var(--color-link-subtle); }
    100% { background-color: var(--color-surface); }
}

.blink-highlight {
    animation: blink-highlight 0.6s linear 1;
}

:target {
    scroll-margin-top: 24px;
}

/* Sidebar Stuff */

#main-container {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: flex-start;
    align-items: flex-start;
    width: 100%;
}

#sidebar {
    display: flex;
    flex-direction: column;

    position: sticky;
    top: 0;
    left: 0;
    width: 255px;
    max-height: calc(100vh - 15vh);
    height: auto;
    overflow: visible;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: none;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-md);
    z-index: 100;

    border-bottom-right-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--color-shadow);

    transition: background-color var(--transition-base), border-color var(--transition-base),
                box-shadow var(--transition-base);

    /* Sidebar Scrollbar */
    /* Firefox default */
    * {
        scrollbar-width: thin;
        scrollbar-color: var(--scroll-thumb) var(--scroll-track);

        transition: scrollbar-color var(--transition-base);
    }

    /* WebKit browsers (Chrome, Edge, Safari) - global */
    ::-webkit-scrollbar {
        width: 12px;
        height: 10px;
    }

    ::-webkit-scrollbar-track {
        background: var(--scroll-track);
        border-radius: 10px;

        transition: background var(--transition-base);
    }

    ::-webkit-scrollbar-thumb {
        background: linear-gradient(180deg, var(--scroll-thumb), rgba(0,0,0,0.12));
        border-radius: 10px;
        border: 2px solid transparent;
        background-clip: padding-box;
        box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 1px 2px rgba(0,0,0,0.04);

        transition: background var(--transition-base);
    }

    /* slightly larger / accent when hovering or on focused interactive areas */
    ::-webkit-scrollbar-thumb:hover,
    ::-webkit-scrollbar-thumb:active {
        background: var(--scroll-thumb-hover);

        transition: background var(--transition-base);
    }
}

#sidebar-spacing-div {
    width: 255px;
}

#sidebar h3 {
    flex: 0 0 auto;

    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);

    margin-top: var(--spacing-xs);

    transition: border-color var(--transition-base);
}

#sidebar ul {
    flex: 1 1 auto;

    min-height: 0;
    overflow-y: auto;
    padding: 0;
    margin: 0;
    list-style: none;
}

#sidebar li {
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;

    border-bottom: 3px dotted var(--color-border);
    transition: border-color var(--transition-base);
}

#sidebar a {
    display: inline-block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;

    color: var(--color-link-subtle);
    text-decoration: none;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    transition: color 0.2s;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-h1: 2rem;
        --font-size-h2: 1.5rem;
        --font-size-h3: 1.25rem;
    }
    
    header, main, footer {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);

        min-width: fit-content;
    }

    .footer-end {
        flex-direction: column-reverse;

        > * {
            margin-bottom: var(--spacing-sm);
        }
    }
    
    nav {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    #sidebar, #sidebar-spacing-div {
        display: none;
    }
}