/* Colors */
:root {
    --color-primary: #bd5f25;
    --color-primary-hover: #16839b;
    --color-text: #2c3e50;
    --color-text-light: #343a40;
    --color-text-lighter: #6c757d;
    --color-background-light: #f8f9fa;
    --color-background-lighter: #ecf0f1;
    --color-background-navbar: #2c3e50;
    --color-background-pagination: #2c3e50;
    --color-background-pagination-active: #16839b;
    --color-background-pagination-disabled: #ecf0f1;
    --color-audience-all: #6b7680;
    --color-audience-beginner: #247c39;
    --color-audience-intermediate: #bb8001;
    --color-audience-advanced: #be0f21;
    --color-audience-women: #904aa5;
    --color-tag-0: #f9a825;
    --color-tag-1: #fbc02d;
    --color-tag-2: #fdd835;
    --color-tag-3: #ffee58;
    --color-tag-4: #fff9c4;
    --color-shadow: rgba(0, 0, 0, 0.05);
    --color-navbar-text: white;
    --color-navbar-text-hover: #b1d1e0;
    --color-info-box-border: #ecf0f1;
}

/* Fonts */
/* Normal + Bold */
@font-face {
    font-family: 'Source Sans Pro';
    src: url('../fonts/SourceSans3-VariableFont_wght.woff2') format('woff2-variations');
    font-weight: 400 700;
    font-style: normal;
    font-display: swap;
}

/* Italic + Italic Bold */
@font-face {
    font-family: 'Source Sans Pro';
    src: url('../fonts/SourceSans3-Italic-VariableFont_wght.woff2') format('woff2-variations');
    font-weight: 400 700;
    font-style: italic;
    font-display: swap;
}

/* Base styles for fonts and typography */
html, body, h1, h2, h3, h4, h5, h6, p, li, blockquote, .navbar, .sidebar, footer {
    font-family: "Source Sans Pro", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
}

#content p,
#content li,
.summary p,
.summary li {
    font-size: 1.7rem;
    line-height: 2.5rem;
}

p {
    padding-bottom: 1rem;
}

.btn,
.btn-xs {
    font-size: 1.6rem;
}

h1 {
    font-size: clamp(2.9rem, 5vw, 3.8rem);
}

h2 {
    font-size: clamp(2.3rem, 4vw, 3.2rem);
}

h3 {
    font-size: clamp(2rem, 3.5vw, 2.7rem);
}

h4 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
}

#content h2,
#content h3,
#content h4 {
    padding: clamp(1rem, 2vw, 1.5rem) 0 clamp(0.5rem, 1.5vw, 0.8rem);
}

/* Blog posts, talks, and workshops */
.post-info .published,
.post-info .audience {
    margin-right: 2rem;
}

.speaker,
.article-date,
.audience {
    font-size: 1.7rem;
    color: var(--color-text);
}

.post-info .label {
    font-size: 1.5rem;
}

div.summary h2 {
    font-size: 2.8rem;
}

div.summary h3 {
    font-size: 2rem;
}

hr {
    border-width: 0.2rem;
}

.audience {
    text-transform: capitalize;
    white-space: nowrap;
}

/* Footnotes */
sup a.footnote-ref {
    white-space: nowrap;
    margin-left: 0.2rem;
    text-decoration: none;
}

/* Links and buttons */
.container a,
.container a:visited {
    color: var(--color-primary);
}

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

.container a.btn {
    background-color: var(--color-primary);
    color: white;
    border: 0.1rem solid var(--color-primary);
}

.container a.btn:hover {
    background-color: var(--color-primary-hover);
    color: white;
    border-color: var(--color-primary-hover);
}

.container ul.pagination a {
    color: white;
    background-color: var(--color-background-pagination);
}

.container ul.pagination a:hover {
    background-color: var(--color-primary-hover);
}

.container ul.pagination li.active a {
    background-color: var(--color-background-pagination-active);
}

.container ul.pagination li.disabled a,
.container ul.pagination li.disabled a:hover {
    background-color: var(--color-background-pagination-disabled);
    color: black;
}

/* Header and navbar */
.page-header {
    margin: 0;
    padding: 0;
}

.page-header + article h2 {
    margin-top: 0.5rem;
}

h1.entry-title + .entry-content > p:first-child {
    margin-top: 3rem;
}

.nav li a,
a.navbar-brand {
    color: var(--color-navbar-text);
    font-size: 1.6rem;
}

.nav li a:hover,
a.navbar-brand:hover {
    color: var(--color-navbar-text-hover) !important;
    text-decoration: underline;
}

/* Responsive YouTube videos */
.videobox,
.video-wrapper {
    position: relative;
    display: block;
    width: 100%;
    max-width: 64rem;
    margin: 2rem auto;
    overflow: hidden;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
}

.videobox iframe,
.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

@media (max-width: 992px) {
    .videobox,
    .video-wrapper {
        max-width: 100%;
        margin: 4rem auto;
    }
}

/* Metadata in article listings */
.meta span i,
.meta .audience i {
    margin-right: 0.4rem;
}

.meta .speaker,
.meta .audiences .audience {
    margin-right: 1rem;
}

.audience-all {
    color: var(--color-audience-all);
}

.audience-beginner {
    color: var(--color-audience-beginner);
}

.audience-intermediate {
    color: var(--color-audience-intermediate);
}

.audience-advanced {
    color: var(--color-audience-advanced);
}

.audience-women {
    color: var(--color-audience-women);
}

/* Speaker box styling */
.speaker-box {
    margin: 3rem 0;
    padding: 2.5rem;
    background-color: var(--color-background-light);
    border-left: 0.4rem solid var(--color-primary-hover);
    border-radius: 0.5rem;
    box-shadow: 0 0.2rem 0.5rem rgba(0, 0, 0, 0.05);
    overflow: hidden;
    clear: both;
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 2rem;
}

.speaker-photo {
    width: 12rem;
    height: 12rem;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
    flex-shrink: 0;
}

.speaker-info {
    flex: 1;
}

.speaker-info h3 {
    margin: 0 0 1.5rem;
    color: var(--color-text);
    font-size: 1.4em;
}

.speaker-bio {
    margin: 1.5rem 0;
    line-height: 1.6;
    color: inherit;
}

.speaker-bio p {
    margin-bottom: 1.5rem;
}

.speaker-bio ul {
    margin-left: 2rem;
    padding-left: 0;
}

.speaker-social {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
}

.speaker-social .social-link {
    display: inline-flex;
    align-items: center;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.95em;
    transition: color 0.2s ease;
    padding: 0.5rem 1rem;
    border-radius: 0.4rem;
}

.speaker-social .social-link:hover {
    color: var(--color-primary-hover);
    text-decoration: none;
    background-color: rgba(0, 123, 255, 0.1);
}

.speaker-social i {
    margin-right: 0.6rem;
    font-size: 1.1em;
    width: 1.8rem;
    text-align: center;
}

/* Tag cloud styling */
ul.tagcloud {
    padding: 0;
    margin: 0;
    list-style: none;
}

ul.tagcloud li {
    display: inline-block;
    margin: 0.3rem;
}

ul.tagcloud li a {
    border-radius: 0.4rem;
    color: #000;
    padding: 0.2rem 0.6rem;
}

ul.tagcloud li.tag-0 a {
    font-size: 2.1rem;
    background-color: var(--color-tag-0);
    padding: 0.6rem 1.2rem;
}

ul.tagcloud li.tag-1 a {
    font-size: 1.7rem;
    background-color: var(--color-tag-1);
    padding: 0.5rem 1rem;
}

ul.tagcloud li.tag-2 a {
    font-size: 1.4rem;
    background-color: var(--color-tag-2);
    padding: 0.4rem 0.8rem;
}

ul.tagcloud li.tag-3 a {
    font-size: 1.25rem;
    background-color: var(--color-tag-3);
    padding: 0.3rem 0.7rem;
}

ul.tagcloud li.tag-4 a {
    font-size: 1.1rem;
    background-color: var(--color-tag-4);
    padding: 0.2rem 0.6rem;
}

ul.tagcloud li a:hover {
    background-color: var(--color-primary-hover);
    color: #fff !important;
    text-decoration: none;
}

/* Navbar styling */
.navbar {
    min-height: 10rem;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    background-color: var(--color-background-navbar);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.navbar-brand .title-container {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.navbar-brand .site-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-navbar-text);
}

.navbar-brand .navbar-subtitle {
    font-size: 1.4rem;
    font-weight: 400;
    color: #ccc;
    margin-top: 0.4rem;
    letter-spacing: 0.5px;
}

body {
    padding-top: 12rem;
}

/* Info box styling */
.info-box {
    border: 0.5rem solid var(--color-info-box-border);
    padding: 2rem;
    margin: 3rem 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    /* Navbar adjustments */
    .navbar {
        min-height: 8rem;
        padding: 1rem;
    }

    .navbar-brand img {
        height: 5rem;
        width: auto;
        object-fit: contain;
    }

    .navbar-brand .site-title {
        font-size: 1.8rem;
    }

    .navbar-brand .navbar-subtitle {
        font-size: 1.2rem;
    }

    body {
        padding-top: 10rem;
    }

    /* Speaker box adjustments */
    .speaker-box {
        flex-direction: column;
        text-align: center;
    }

    .speaker-photo {
        margin: 0 auto 1.5rem;
    }

    .speaker-social {
        justify-content: center;
    }

    /* Font size adjustments */
    h1 { font-size: 2.9rem; }
    h2 { font-size: 2.6rem; }
    h3 { font-size: 2.3rem; }
    h4 { font-size: 2rem; }
}

/* Focus styles for accessibility (keyboard navigation) */
a:focus-visible,
button:focus-visible {
    outline: 0.2rem solid var(--color-primary-hover);
    outline-offset: 0.2rem;
}

/* Hover style */
a:hover,
button:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* Styling for sponsor logos */
.image-grid {
    display: grid;
    grid-template-columns: 1fr 1fr; /* Two columns */
    gap: 40px; /* Space between logos */
    margin: 40px 0;
    align-items: center; /* Vertically centered */
    justify-items: center; /* Horizontally centered */
}

@media (max-width: 768px) {
    .image-grid {
        grid-template-columns: 1fr; /* Single column on smaller screens */
    }
}

/* Styling for logo images */
.image-left img,
.image-right img {
    max-width: 100%; /* Width fits the cell */
    max-height: 120px; /* Same height for all logos */
    height: auto;
    display: block;
    object-fit: contain; /* Proportional within the height */
    border: none;
    background-color: transparent;
    transition: transform 0.2s ease;
}

/* Styling for logo links */
.image-left a,
.image-right a {
    all: unset; /* Reset all default styles */
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none !important; /* Remove underline */
    border: none !important;
    box-shadow: none !important;
    cursor: pointer;
}

/* Hover effect for logo links */
.image-left a:hover,
.image-right a:hover {
    text-decoration: none !important; /* Ensure no underline on hover */
}

/* Hover effect for logo images */
.image-left img:hover,
.image-right img:hover {
    transform: scale(1.05); /* Zoom effect for hover */
}

/* Focus styles for accessibility */
.image-left a:focus,
.image-right a:focus {
    outline: 0.2rem solid var(--color-primary-hover);
    outline-offset: 0.2rem;
}

/* Focus styles only for keyboard navigation */
.image-left a:focus:not(:focus-visible),
.image-right a:focus:not(:focus-visible) {
    outline: none;
}