:root {
    --font-sans: 'Noto Sans', sans-serif;
    --font-serif: 'Noto Serif', serif;
    --font-size: 1rem;
    --line-height: 1.6;
    --letter-spacing: 0.1rem;
    
    --border-radius-small: 6px;
    --border-radius-medium: 12px;
    --border-radius-large: 16px;
    --border-radius-rounded: 50%/100%;
    
    --headings-weight: 600;
    --headings-margin-bottom: 1rem;
    
    --link-underline-color: #fff;
    --link-underline-hover: #ff0;
    --link-underline-active: #0f0;
    --link-underline-thickness: 0.15em;
    --link-underline-offset: 0.25em;
    --link-transition: 0.2s;
    
    
    --button-padding: 12px 16px;
    --button-font-weight: 500;
    --button-transition: 0.1s ease-in-out;
    
    --page-width: 1000px;
    --body-padding-v: 32px;
    --body-padding-h: 20px;
    
    --header-height: 50px; /* 40px */
    --header-margin-top: 6px;
    --header-margin-bottom: 20px;
    --header-padding-edges: 4px;
    --header-gap: 24px;
    --header-border-radius: var(--border-radius-large);
    --floating-dock-border-radius: calc(
        var(--border-radius-large) - var(--header-padding-edges)
    );
    --floating-dock-min-width: calc(var(--floating-dock-border-radius) * 2);
    --floating-dock-padding-sides: 0 3px;
    
    --radio-slider-gap: 24px;
    
    --footer-margin: 6px;
    
    --box-shadow: rgba(0, 0, 0, 0.37) 0px 1px 4px 0px;

    
    /* Theming */
    --light-page-background: #fefefe;
    --dark-page-background: hsl(100 7% 8%);
    
    --light-background: #fefefe;
    --dark-background: hsl(100 7% 12%);
    
    --light-app-border: hsl(100 7% 70%);
    --dark-app-border: hsl(100 7% 30%);
    --app-border-style: 1px solid;
    
    --dark-level-1: hsl(0 0% 100% / 8%);
    --dark-level-2: hsl(0 0% 100% / 15%);
    --dark-level-3: hsl(0 0% 100% / 20%);
    
    --light-level-1: hsl(0 0% 0% / 8%);
    --light-level-2: hsl(0 0% 0% / 15%);
    --light-level-3: hsl(0 0% 0% / 20%);
    
    --light-header: hsl(100 6% 85%);
    --dark-header: hsl(100 6% 15%);
    
    --light-link-hover: hsl(100 10% 80%);
    --dark-link-hover: hsl(100 10% 20%);
    
    --light-link-active: hsl(100 10% 70%);
    --dark-link-active: hsl(100 10% 30%);
    
    --light-text: hsl(85 8% 16%);
    --dark-text: hsl(85 8% 84%);
    
    --text: var(--light-text);
    --page-background: var(--light-page-background);
    --background: var(--light-background);
    --app-border: var(--light-app-border);
    
    --level-1: color-mix(in srgb, var(--background), var(--light-level-1));
    --level-2: color-mix(in srgb, var(--background), var(--light-level-2));
    --level-3: color-mix(in srgb, var(--background), var(--light-level-3));
    --level-4: color-mix(in srgb, var(--background), var(--light-level-4));
    
    --header: var(--light-header);
    --link-hover: var(--light-link-hover);
    --link-active: var(--light-link-active);
}

@media (prefers-color-scheme: dark) {:root {
    --text: var(--dark-text);
    --page-background: var(--dark-page-background);
    --background: var(--dark-background);
    --app-border: var(--dark-app-border);
    
    --level-1: color-mix(in srgb, var(--background), var(--dark-level-1));
    --level-2: color-mix(in srgb, var(--background), var(--dark-level-2));
    --level-3: color-mix(in srgb, var(--background), var(--dark-level-3));
    --level-4: color-mix(in srgb, var(--background), var(--dark-level-4));
    
    --header: var(--dark-header);
    --link-hover: var(--dark-link-hover);
    --link-active: var(--dark-link-active);
}}

[data-theme="light"] {
    --text: var(--light-text);
    --page-background: var(--light-page-background);
    --background: var(--light-background);
    --app-border: var(--light-app-border);
    
    --level-1: color-mix(in srgb, var(--background), var(--light-level-1));
    --level-2: color-mix(in srgb, var(--background), var(--light-level-2));
    --level-3: color-mix(in srgb, var(--background), var(--light-level-3));
    --level-4: color-mix(in srgb, var(--background), var(--light-level-4));
    
    --header: var(--light-header);
    --link-hover: var(--light-link-hover);
    --link-active: var(--light-link-active);
}

[data-theme="dark"] {
    --text: var(--dark-text);
    --page-background: var(--dark-page-background);
    --background: var(--dark-background);
    --app-border: var(--dark-app-border);
    
    --level-1: color-mix(in srgb, var(--background), var(--dark-level-1));
    --level-2: color-mix(in srgb, var(--background), var(--dark-level-2));
    --level-3: color-mix(in srgb, var(--background), var(--dark-level-3));
    --level-4: color-mix(in srgb, var(--background), var(--dark-level-4));
    
    --header: var(--dark-header);
    --link-hover: var(--dark-link-hover);
    --link-active: var(--dark-link-active);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    line-height: var(--line-height);
    color: var(--text);
    corner-shape: squircle;
    overflow: visible;
}

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

html {
    background-color: var(--background);
    box-sizing: border-box;
    font-size: var(--font-size);
    height: 100%;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: var(--headings-weight);
    margin-bottom: var(--headings-margin-bottom);
}

a {
    text-decoration: underline;
    text-decoration-skip-ink: none;
    text-decoration-color: var(--link-underline-color);
    text-decoration-thickness: var(--link-underline-thickness);
    text-underline-offset: var(--link-underline-offset);
    transition: var(--link-transition);
    transition-property: text-decoration-color;
    font-family: var(--font-sans);
    font-weight: 600;
}

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

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

button {
    background: none;
    border: none;
    cursor: pointer;
}

ul, ol {
    list-style: none;
    padding-left: 0;
}

body {
    display: flow-root;
    max-width: calc(var(--page-width) + var(--body-padding-h)); 
    margin: auto;
    padding: var(--body-padding-v) var(--body-padding-h);
    min-height: 100vh;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - var(--body-padding-v) * 2);
}

header {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    height: var(--header-height);
    margin-top: var(--header-margin-top);
    margin-bottom: var(--header-margin-bottom);
    padding: var(--header-padding-edges);
    gap: var(--header-gap);
}

header > nav {
    height: 100%;
}

#header-left, #header-right {
    display: flex;
    flex: 1;
}

/* the light/dark toggle looks bad right now, so hide it */
#header-right {
  visibility: hidden;
}

#header-center {
    display: flex;
    flex: 0;
    flex-direction: row;
    justify-content: center;
    text-align: center;
    
}

#header-right {
    text-align: right;
    justify-content: flex-end;
}

floating-dock {
    height: 100%;
    align-content: center;
    border-radius: var(--floating-dock-border-radius);
    min-width: var(--floating-dock-min-width);
    padding: var(--floating-dock-padding-sides);
}

.radio-slider {
    display: flex;
    height: 100%;
    position: relative; /* Creates positioning context for absolute child */
    overflow: hidden;
}

.radio-item {
    display: flex;
    text-align: center;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    padding: 0rem 1rem;
    position: relative;
    z-index: 1;
    text-decoration: none;
    border-radius: var(--border-radius-medium);
    transition: 0.1s ease-in;
}

.radio-item:hover {
  background-color: #f3f3f3;
}

.radio-item.radio-item-active {
  background-color: #eaeaea;
}

.radio-highlight {
  position: absolute;
  top: 0;
  left: 0;
  background: #e6e6e6;
  height: 100%;
  border-radius: 8px;
  transition:
    transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  z-index: 0;
}



/* Main */

main {
  flex: 1 0 auto;
}

main section:not(:first-child) {
  margin-top: 30px;
}

main section posts {
  display: grid;
  /* page width minus gap */
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 20px;
}



/* card styling */

.post-card {
  display: grid;
  grid-template-columns: 1fr 2fr;
  border: 1px solid #e4e4e4;
  border-radius: var(--border-radius-large);
  background-color: #f7f7f7;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  overflow: hidden;
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.05);
  cursor: pointer;
}

.post-card__image {
  background: #f4f4f4;
  overflow: hidden;
}
.post-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.post-card__body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.post-card__title {
  margin: 0 0 0.5rem;
  font-family: "Noto Serif", serif;
  font-weight: 700;
}

.post-card__excerpt {
  color: #666;
  margin: 0 0 1rem;
  font-weight: 400;
}

.post-card__tags {
  margin-top: auto;
  font-size: 0.875rem;
  color: #999;
}

.post-card__tag + .post-card__tag {
  margin-left: 0.5rem;
}

.post-card__read {
  margin-top: 0.75rem;
  color: #3b37f2;
  font-weight: 500;
}

.post-card--no-image {
  grid-template-columns: 1fr;
}


/* Footer styling */

footer {
    display: flex;
    justify-content: center;
    margin-bottom: var(--footer-margin);
    color: #ccc;
}

footer p {
  color: #555;
  font-weight: 400;
}