/* ============================================
   IMPROVING ADOPTION - CASE STUDY STYLES
   ============================================ */

/* ---------- IMPORTS ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Big+Shoulders+Display:wght@100..900&family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap');


/* ========== COLOR VARIABLES ========== */

/* Light theme colors (default) */
:root {
    --background: #FCFCFC;
    --background-grey: #ebebeb;
    --border-light: #cccccc;
    --text-primary: #262628; 
    --text-secondary: #737373; 
    --primary: #0070EA; 
    --red: #db4f4f;
}

/* Dark theme colors (auto) */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #040404;
        --background-grey: #2B2C2E;
        --border-light: #333435;
        --text-primary: #d4d4d4; 
        --text-secondary: #adabab; 
        --text-normal: #ffffff;
        --text-bold: #ffffff;
        --primary: #0A84FF; 
        --red: #db4f4f;
    }

    hr {
        border-color: var(--background-grey);
    }
}
/* Forced theme overrides (manual toggle) */
html.force-light {
    --background: #FCFCFC;
    --background-grey: #F3F5F7;
    --border-light: #cccccc;
    --text-primary: #262628;
    --text-secondary: #737373;
    --text-normal: #262628;
    --text-bold: #0a0a0a;
    --primary: #0070EA;
    --red: #db4f4f;
    color-scheme: light;
}

html.force-dark {
    --background: #040404;
    --background-grey: #2B2C2E;
    --text-primary: #F0F0F0;
    --border-light: #333435;
    --text-secondary: #adabab;
    --text-normal: #e4e4e4;
    --text-bold: #ffffff;
    --primary: #0A84FF;
    --red: #db4f4f;
    color-scheme: dark;
}


/* ========== BASE STYLES ========== */

/* HTML and body base styling */
html {
    background-color: var(--background);
    scroll-behavior: smooth;
}

body {
    font-family: "Inter", serif;
    font-size: 16px;
    color: var(--text-primary);
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}


/* ========== TYPOGRAPHY ========== */

/* Heading styles */
h1 {
    font-family: "Big Shoulders Display", serif;
    font-size: 3rem !important;
    margin-top: 2rem;
    margin-bottom: 1rem;
    letter-spacing: -0.3px;
    color: var(--text-bold);
}

h2, h3, h4, h5, h6, p {
    font-family: 'Inter', sans-serif;
}

h2 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.3px;
    color: var(--text-bold);
}

h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.8rem 0 0.8rem;
    line-height: 1.6rem;
    color: var(--text-bold);
}

/* Bold text emphasis */
b {
    font-weight: 600;
    color: var(--text-bold);
}

/* Paragraph styles */
p {
    line-height: 1.5;
    margin: 1rem 0;
    color: var(--text-primary);
}

/* List styles */
li {
    line-height: 1.5;
    margin-top: 0.35rem;
}

ol {
    padding-left: 1.4rem;
    margin: 0 0 1.2rem 0;
}

ol li {
    line-height: 1.5;
    margin-bottom: 0.35rem;
}

ul {
    padding-left: 1.4rem;
    margin: 0 0 1.2rem 0;
}

ul li {
    line-height: 1.5;
    margin-bottom: 0.35rem;
}

/* Link styles */
a:link {
    text-decoration: none;
    color: var(--primary);
}

a:visited {
    text-decoration: none;
    color: var(--primary);
}

p a:hover {
    text-decoration: underline;
}


/* ========== ARTICLE LAYOUT ========== */

/* Main article container */
.article-container {
    margin: auto;
    display: flex;
    justify-content: center;
    padding: 40px 20px 100px 20px;
    width: 100%;
    box-sizing: border-box;
}

.article-body {
    max-width: 700px;
    width: 100%;
    padding: 0 1rem;
    box-sizing: border-box;
}

.article-body > section + section {
    margin-top: 3rem;
}

/* Article-specific heading adjustments */
.article-h1 {
    font-size: 2rem;
    letter-spacing: -0.05rem;
    margin-bottom: 2rem;
    margin-top: 2rem;
    line-height: 1.25;
}

.article-h2 {
    margin-top: 3.5rem;
    margin-bottom: 1.25rem;
}

/* Anchor offset for in-page navigation */
.article-body h1[id],
.article-body h2[id],
.article-body h3[id],
.article-body h4[id],
.article-body h5[id],
.article-body h6[id] {
    scroll-margin-top: 110px;
}


/* ========== ARTICLE FIGURES & IMAGES ========== */

/* Figure container with breakout layout */
.article-figure {
    margin: 2rem auto;
    max-width: 800px;
    width: calc(100% + 100px);
    margin-left: -40px;
    margin-right: -50px;
}

.article-figure img,
.article-figure video,
.article-video video {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
    /* Force clipping for video content */
    clip-path: inset(0px round 8px);
}

.article-figure figcaption, .article-video figcaption  {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Grey background container for images/diagrams */
.grey-background-article {
    background-color: var(--background-grey);
    border-radius: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 800px;
    width: calc(100% + 100px);
    margin-left: -50px;
    margin-right: -50px;
    min-width: 180px;
    height: 310px;
    position: relative;
    overflow: hidden;
}

/* Video styling */
.article-video {
    border-radius: 8px;
    margin: 1rem 0;
    margin: 2rem auto;
    max-width: 800px;
    width: calc(100% + 100px);
    margin-left: -50px;
    margin-right: -50px;
    
                /* Hide content while loading */
            .media-loading-content {
                opacity: 0;
                transition: opacity 0.4s ease-in;
            }
            
            .media-loaded-content {
                opacity: 1;
            }

            /* Hide mute button from video controls, keep only fullscreen */
            video::-webkit-media-controls-mute-button {
                display: none !important;
            }
            video::-moz-media-controls-mute-button {
                display: none !important;
            }
            video::-ms-media-controls-mute-button {
                display: none !important;
            }
}


/* ========== CODE BLOCKS ========== */

/* Code block container */
pre {
    font-size: 0.8rem;
    line-height: 1.6rem;
    margin: 0;
    padding: 0;
    background-color: #1E1E1E;
    border-radius: 8px;
    width: 100%;
    margin: 1.5rem 0;
}

/* Code element styling */
code {
    padding: 1.5rem;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-x: visible;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    color: #D4D4D4;
    display: block;
    border-radius: 8px;
}

pre > code {
    margin: 0;
}

/* Code blocks in list items */
li pre {
    margin-left: -1.5rem;
    margin-right: 0;
    width: calc(100% + 1.5rem);
}


/* ========== DIVIDERS & SEPARATORS ========== */

/* Introduction section divider */
.intro-hr {
    margin-top: 4rem;
    margin-bottom: 2rem;
    border: 0;
    border-top: 2px solid #cccccc;
}

@media (prefers-color-scheme: dark) {
    .intro-hr {
        border-top: 2px solid #2B2C2E;
    }
}

/* Forced theme overrides for divider */
html.force-light .intro-hr {
    border-top: 2px solid #cccccc;
}

html.force-dark .intro-hr {
    border-top: 2px solid #2B2C2E;
}


/* ========== NAVIGATION ELEMENTS ========== */

/* Back button (fixed top-left) */
.back-button {
    position: fixed;
    top: 2rem;
    left: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: var(--text-primary) !important;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    z-index: 100;
    white-space: nowrap;
}

.back-button:hover {
    transform: translateY(-1px);
    color: var(--primary) !important;
}

/* Jump button (CTA style) */
.jump-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin: 2rem 0 0 0;
    padding: 10px 20px;
    background: transparent;
    color: var(--primary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    border: 1px solid var(--primary);
}

.jump-btn:hover {
    color: var(--red);
    border-color: var(--red);
    background-color: var(--background-grey);
}


/* ========== TABLE OF CONTENTS ========== */

/* Sticky TOC positioning */
.toc-sticky {
    position: fixed;
    top: 2rem;
    right: 24px;
    width: 220px;
    z-index: 110;
}

/* TOC wrapper container */
.toc-wrapper {
    position: relative;
    padding-left: 22px;
    background: var(--background);
    border: none;
    border-radius: 12px;
    padding: 14px 16px;
    box-shadow: none;
    transition: transform 0.2s ease;
}

.toc-wrapper:hover {
    transform: translateY(-1px);
}

/* TOC title styling */
.toc-title {
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin: 0 0 8px 0;
    color: var(--text-secondary);
}

/* TOC list and links */
.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin: 6px 0;
}

.toc-list a {
    display: block;
    padding: 4px 0 4px 8px;
    border-left: 2px solid transparent;
    color: rgba(128, 128, 128, 0.6);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.toc-list a:hover {
    color: var(--primary);
    border-left: 2px solid transparent;
}

.toc-list a.active {
    color: var(--text-primary);
    border-left: 2px solid transparent;
}

/* TOC "back to top" link */
.toc-top {
    display: inline-block;
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--primary);
}

/* Reading progress bar (vertical in TOC) */
.reading-progress {
    position: absolute;
    left: 0;
    width: 2px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 999px;
    overflow: hidden;
    pointer-events: none;
}

.reading-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background: var(--text-secondary);
    border-radius: inherit;
    transition: height 0.1s linear;
}


/* ========== DATA TABLES ========== */

/* Base table styling */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    border: 1px solid var(--background-grey);
    border-radius: 8px;
    overflow: hidden;
}

/* Table header styling */
table th {
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
}

/* Table data cell styling */
table td {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Cell padding and borders */
table th, table td {
    padding: 0.75rem 1rem;
    vertical-align: top;
    border-bottom: 1px solid var(--background-grey);
}

table tr:last-child td {
    border-bottom: none;
}

/* Table header row background */
.table-header {
    background-color: #D1D5DB;
}

/* First column highlight */
.table-first-col {
    background-color: rgba(209, 213, 219, 0.4);
}

/* Dark mode table colors */
@media (prefers-color-scheme: dark) {
    .table-header {
        background-color: var(--background-grey);
    }
    .table-first-col {
        background-color: rgba(43, 44, 46, 0.3);
    }
}


/* ========== TIMELINE COMPONENT ========== */

/* Timeline container */
.timeline-container {
    margin: 2.5rem 0;
    position: relative;
    overflow-x: auto;
}

/* Horizontal timeline line */
.timeline-line {
    position: absolute;
    top: 6px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--text-secondary);
    opacity: 0.25;
    z-index: 0;
}

/* Timeline items wrapper */
.timeline-items {
    display: flex;
    justify-content: space-between;
    position: relative;
    z-index: 1;
    min-width: fit-content;
}

/* Individual timeline item */
.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    flex: 1;
    min-width: 100px;
}

/* Timeline dot marker */
.timeline-dot {
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    border-radius: 50%;
    margin-bottom: 1.5rem;
}

/* Timeline date label */
.timeline-date {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
    font-family: monospace;
    min-width: 80px;
}

/* Timeline description text */
.timeline-label {
    font-size: 0.85rem;
    color: var(--text-primary);
    line-height: 1.35;
    font-weight: 400;
    padding-right: 1rem;
    max-width: none;
}


/* ========== NEXT STEPS CTA ========== */

/* Next steps section */
.next-steps {
    margin: 3rem 0 2rem;
}

.next-steps-title {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.25rem;
}

/* Grid layout for next step cards */
.next-steps-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

/* Individual next step card */
.next-step-card {
    display: flex;
    flex-direction: column;
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    text-decoration: none;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.next-step-card:hover {
    border-color: var(--text-secondary);
    background-color: var(--background-grey);
}

.next-step-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.next-step-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Next steps footer links */
.next-steps-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.next-steps-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.next-steps-links a:hover {
    color: var(--primary);
}

.next-steps-links .divider {
    color: var(--text-secondary);
    opacity: 0.5;
}


/* ========== UTILITY CLASSES ========== */

/* Intro tags styling */
#intro-tags1 {
    margin-top: 3rem;
    color: var(--text-secondary) !important;
}

/* Hyperlink primary color override */
.hyp-p {
    color: var(--primary) !important;
}

.hyp-p:hover {
    color: var(--red) !important;
}

/* Footer container */
.footer-container {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
}


/* ========== THEME TOGGLE ========== */

/* Theme toggle button (fixed bottom-right) */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 8px 12px;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.12);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.86rem;
    border: 1px solid rgba(0, 0, 0, 0.08);
    cursor: pointer;
    box-shadow: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    z-index: 195;
    transition: transform 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.theme-toggle:hover {
    transform: translateY(-1px);
    background: rgba(0, 0, 0, 0.16);
    border-color: rgba(0, 0, 0, 0.12);
}

.theme-toggle:active {
    transform: translateY(0);
}


/* ========== TOAST NOTIFICATIONS ========== */

/* Toast container (fixed bottom-right) */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    max-width: 320px;
    padding: 14px 16px;
    border-radius: 12px;
    background: rgba(20, 20, 20, 0.92);
    color: #f7f7f7;
    box-shadow: 0 12px 30px rgba(0,0,0,0.18);
    display: none;
    gap: 12px;
    z-index: 200;
}

.toast.show {
    display: grid;
    grid-template-columns: 1fr;
    row-gap: 10px;
}

/* Toast title */
.toast-title {
    font-size: 0.95rem;
    font-weight: 700;
}

/* Toast message text */
.toast-text {
    font-size: 0.9rem;
    color: #e0e0e0;
    line-height: 1.4;
}

/* Toast action buttons container */
.toast-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Toast buttons */
.toast button {
    cursor: pointer;
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.toast .btn-primary {
    background: #f7f7f7;
    color: #141414;
    box-shadow: 0 6px 14px rgba(0,0,0,0.22);
}

.toast .btn-ghost {
    background: transparent;
    color: #f7f7f7;
    border: 1px solid rgba(255,255,255,0.35);
}

.toast button:hover {
    transform: translateY(-1px);
}

.toast button:active {
    transform: translateY(0);
}


/* ========== RESPONSIVE DESIGN ========== */

/* Tablet and below - hide TOC */
@media (max-width: 1100px) {
    .toc-sticky {
        display: none;
    }
}

/* Large tablet breakpoint */
@media only screen and (max-width: 900px) {
    .article-figure,
    .grey-background-article {
        width: 100%;
        margin-left: 0;
        margin-right: 0;
        max-width: 100%;
    }
}

/* Tablet breakpoint */
@media only screen and (max-width: 768px) {
    .article-container {
        padding: 50px 10px;
    }
    
    .article-body {
        padding: 0;
    }

    /* Back button becomes relative on mobile */
    .back-button {
        position: relative;
        display: inline-flex;
        top: 1rem;
        left: 1rem;
    }

    /* Table adjustments */
    table {
        font-size: 0.85rem;
    }
    
    table th,
    table td {
        padding: 0.75rem 0.25rem;
    }

    /* Timeline becomes vertical on mobile */
    .timeline-container {
        margin: 2rem 0;
    }

    .timeline-items {
        flex-direction: column;
        gap: 1.25rem;
        padding-left: 1.5rem;
    }

    .timeline-line {
        left: 5px;
        right: auto;
        width: 1px;
        height: 100%;
        top: 0;
    }

    .timeline-item {
        flex-direction: row;
        align-items: flex-start;
        gap: 1rem;
        min-width: auto;
    }

    .timeline-dot {
        flex-shrink: 0;
        margin-bottom: 0;
        margin-top: 4px;
        width: 10px;
        height: 10px;
    }

    .timeline-content {
        display: flex;
        flex-direction: column;
    }

    .timeline-label {
        max-width: none;
    }

    /* Code blocks in lists */
    li pre {
        margin-left: -1.5rem;
        width: calc(100% + 1.5rem);
    }
}

/* Mobile breakpoint */
@media only screen and (max-width: 600px) {
    /* Next steps grid becomes single column */
    .next-steps-grid {
        grid-template-columns: 1fr;
    }

    .next-steps-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .next-steps-links .divider {
        display: none;
    }
}

/* Small mobile breakpoint */
@media only screen and (max-width: 480px) {
    .grey-background-article {
        height: 200px;
    }
}