/*
 * COS226 Assignment Specification Styles
 * Modern Bootstrap 5 based styling
 */

/* ============================================
   CSS Variables for Course Branding
   ============================================ */
:root {
    --cos226-primary: #E77500;      /* Princeton orange */
    --cos226-secondary: #000000;     /* Black */
    --cos226-light: #FBE8E5;         /* Light pink/salmon (from old nav) */
    --cos226-code-color: #c7254e;    /* Code text color */
    --cos226-code-bg: #f9f2f4;       /* Code background */
    --cos226-terminal-bg: #1e1e1e;   /* Terminal background */
    --cos226-terminal-fg: #d4d4d4;   /* Terminal text */
    --cos226-api-border: #dee2e6;    /* API block border */
}

/* ============================================
   Body & Typography
   ============================================ */
body {
    padding-top: 80px;  /* Space for fixed navbar */
    line-height: 1.6;
}

/* ============================================
   Table of Contents Column
   ============================================ */
.toc-column {
    padding-top: 1rem;
}

.toc-sidebar {
    position: sticky;
    top: 90px;  /* Below navbar */
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    padding: 0;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border-left: 2px solid #dee2e6;
}

.toc-item {
    margin: 0;
}

.toc-item a {
    display: block;
    padding: 0.4rem 0.75rem;
    color: #666;
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.15s ease, border-color 0.15s ease;
    margin-left: -2px;
    border-left: 2px solid transparent;
}

.toc-item a:hover {
    color: var(--cos226-primary);
}

.toc-item.toc-level-2 a {
    padding-left: 1.25rem;
    font-size: 0.75rem;
}

/* Active TOC item (highlighted when scrolled to) */
.toc-item.active a {
    color: var(--cos226-primary);
    border-left-color: var(--cos226-primary);
    font-weight: 500;
}

/* Main content column */
.main-content {
    padding-left: 4rem;
    padding-right: 4rem;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--cos226-secondary);
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 4px solid var(--cos226-primary);
    position: relative;
}

h1::before {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--cos226-secondary);
}

/* First h1 shouldn't have as much top margin */
.main-content > h1:first-child {
    margin-top: 0;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    border-bottom: 2px solid var(--cos226-primary);
    padding-bottom: 0.5rem;
    margin-top: 2.5rem;
}

/* ============================================
   Navigation Bar
   ============================================ */
.navbar {
    background-color: var(--cos226-light) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: bold;
    font-variant: small-caps;
    font-size: 1.4rem;
    color: #222 !important;
}

.navbar-brand img {
    height: 45px;
    margin-right: 12px;
    border: 1px solid #999;
    border-radius: 4px;
}

.navbar-nav .nav-link {
    font-weight: 600;
    color: #666 !important;
    margin-left: 0.5rem;
}

.navbar-nav .nav-link:hover {
    color: #000 !important;
}

/* ============================================
   Code Styling
   ============================================ */

/* Inline code */
code {
    color: var(--cos226-code-color);
    background-color: var(--cos226-code-bg);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.9em;
}

/* Code blocks */
pre {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    padding: 1rem;
    overflow-x: auto;
}

pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
}

/* API code blocks - for class/method definitions */
pre.api {
    background-color: #fff;
    border: 2px solid var(--cos226-api-border);
    font-weight: bold;
}

pre.api code {
    font-weight: bold;
}

pre.api .comment {
    color: #6a9955;
    font-weight: normal;
    font-style: italic;
}

/* Code annotations - collapsible detail boxes using Bootstrap */
.code-annotation-toggle {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    margin-left: 0.5rem;
    background-color: var(--cos226-primary);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: bold;
    text-decoration: none;
    vertical-align: middle;
    transition: background-color 0.15s ease, transform 0.15s ease;
}

.code-annotation-toggle:hover {
    background-color: #c66000;
    transform: scale(1.1);
}

.code-annotation-toggle .bi {
    font-size: 0.65rem;
}

/* The detail box - Bootstrap alert style */
.annotation-detail {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-weight: normal;
    font-style: normal;
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0.5rem 0 0.75rem 0;
    max-width: 100%;
    white-space: normal;
    word-wrap: break-word;
}

.annotation-detail .card {
    border-left: 4px solid var(--cos226-primary);
    background-color: #fff8f0;
}

.annotation-detail .card-body {
    padding: 0.75rem 1rem;
}

.annotation-detail .card-text {
    margin: 0;
    color: #333;
}

/* Annotated code blocks */
pre.annotated {
    position: relative;
}

/* Terminal code blocks */
pre.terminal {
    background-color: var(--cos226-terminal-bg);
    color: var(--cos226-terminal-fg);
    border: none;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
}

pre.terminal code {
    color: var(--cos226-terminal-fg);
}

pre.terminal .prompt {
    color: #569cd6;
}

pre.terminal .command {
    color: #dcdcaa;
}

/* ============================================
   Tables
   ============================================ */
.table {
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.table thead th {
    border-bottom: 2px solid var(--cos226-primary);
    font-style: italic;
    font-weight: normal;
}

.grading-table {
    max-width: 300px;
}

.grading-table td:last-child,
.grading-table th:last-child {
    text-align: center;
}

/* ============================================
   Images
   ============================================ */
.figure {
    margin: 1.5rem 0;
}

.figure-img {
    max-width: 100%;
    height: auto;
}

.figure-caption {
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

/* Image galleries/rows */
.image-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.image-row figure {
    margin: 0;
    text-align: center;
}

.image-row img {
    max-height: 175px;
    width: auto;
}

/* ============================================
   Admonitions (Note, Warning, etc.)
   ============================================ */
.admonition {
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    border-left: 4px solid;
    border-radius: 0.375rem;
    background-color: #f8f9fa;
}

.admonition-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.admonition.note {
    border-color: #0d6efd;
    background-color: #e7f1ff;
}

.admonition.note .admonition-title {
    color: #0d6efd;
}

.admonition.warning {
    border-color: #ffc107;
    background-color: #fff8e6;
}

.admonition.warning .admonition-title {
    color: #997404;
}

.admonition.tip {
    border-color: #198754;
    background-color: #e8f5e9;
}

.admonition.tip .admonition-title {
    color: #198754;
}

.admonition.important {
    border-color: #dc3545;
    background-color: #ffebee;
}

.admonition.important .admonition-title {
    color: #dc3545;
}

/* Requirements cards - for must-follow instructions */
.admonition.req {
    padding: 0;
    border: none;
    border-radius: 0.5rem;
    background-color: transparent;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.admonition.req .admonition-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0.75rem 1rem;
    background-color: var(--cos226-secondary);
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.admonition.req .admonition-title::before {
    content: '\f0ae';  /* Bootstrap Icons checklist */
    font-family: 'bootstrap-icons';
    font-size: 1rem;
}

.admonition.req .admonition-content {
    padding: 1rem 1.25rem;
    background-color: #fafafa;
    border: 1px solid #e0e0e0;
    border-top: none;
    border-radius: 0 0 0.5rem 0.5rem;
}

.admonition.req .admonition-content p {
    margin-bottom: 0.75rem;
}

.admonition.req .admonition-content p:last-child {
    margin-bottom: 0;
}

.admonition.req .admonition-content ul,
.admonition.req .admonition-content ol {
    margin-bottom: 0;
    padding-left: 0;
    list-style: none;
}

/* Method separators */
.admonition.req .admonition-content hr {
    border: none;
    border-top: 1px dashed #999;
    margin: 1rem 0;
}

/* Method name styling */
.admonition.req .admonition-content > p > strong > code {
    font-size: 0.95rem;
    background-color: #e8e8e8;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
}

/* Requirement items - aligned layout with labels */
.admonition.req .admonition-content li {
    margin-bottom: 0.4rem;
    padding-left: 1rem;
    display: grid;
    grid-template-columns: 7.5rem 1fr;
    align-items: baseline;
    gap: 1rem;
}

.admonition.req .admonition-content li:last-child {
    margin-bottom: 0;
}

/* Color-coded requirement labels as badges */
.admonition.req .admonition-content li .req-label {
    display: inline-block;
    font-style: normal;
    font-weight: 600;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    text-align: center;
    white-space: nowrap;
    width: fit-content;
    justify-self: start;
}

/* Behavior label - purple */
.admonition.req .admonition-content li .req-label-behavior {
    background-color: #f3e5f5;
    color: #7b1fa2;
}

/* Performance label - blue */
.admonition.req .admonition-content li .req-label-performance {
    background-color: #e3f2fd;
    color: #1565c0;
}

/* Corner case label - amber/orange */
.admonition.req .admonition-content li .req-label-corner {
    background-color: #fff3e0;
    color: #e65100;
}

/* Other requirements label - green */
.admonition.req .admonition-content li .req-label-other {
    background-color: #e8f5e9;
    color: #2e7d32;
}

/* ============================================
   Collapsible Sections (Details/Summary)
   ============================================ */
details {
    margin: 1.5rem 0;
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    overflow: hidden;
}

details summary {
    padding: 1rem 1.25rem;
    background-color: #f8f9fa;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

details summary:hover {
    background-color: #e9ecef;
}

details summary::before {
    content: '\25B6';  /* Right-pointing triangle */
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

details[open] summary::before {
    transform: rotate(90deg);
}

details > div {
    padding: 1rem 1.25rem;
}

/* Checklist specific styling */
details.checklist {
    border-color: var(--cos226-primary);
}

details.checklist summary {
    background-color: var(--cos226-light);
}

/* ============================================
   Lists
   ============================================ */
ul, ol {
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

/* ============================================
   Links with Icons (excludes navbar links)
   ============================================ */
a[href$='.zip']:not(.nav-link)::after {
    content: ' \1F4E6';  /* Package emoji */
    font-size: 0.8em;
}

a[href$='.java']:not(.nav-link)::after,
a[href*='javadoc']:not(.nav-link)::after {
    content: ' \2615';  /* Coffee emoji for Java */
    font-size: 0.8em;
}

a[href$='.pdf']:not(.nav-link)::after {
    content: ' \1F4C4';  /* Document emoji */
    font-size: 0.8em;
}

/* External links */
a[href^="http"]:not([href*="princeton.edu"])::after {
    content: ' \2197';  /* Arrow */
    font-size: 0.7em;
}

/* ============================================
   Footer
   ============================================ */
footer {
    margin-top: 3rem;
    padding: 1.5rem 0;
    border-top: 1px solid #dee2e6;
    color: #666;
    font-size: 0.9rem;
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }

    .navbar-brand {
        font-size: 1.1rem;
    }

    .navbar-brand img {
        height: 35px;
    }

    .image-row {
        flex-direction: column;
        align-items: center;
    }

    pre {
        font-size: 0.8rem;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .navbar {
        position: relative;
    }

    body {
        padding-top: 0;
    }

    pre.terminal {
        background-color: #eee !important;
        color: #000 !important;
    }

    details {
        display: block;
    }

    details > div {
        display: block !important;
    }
}