/* VSCode Dark/Light Mode Compatibility */
.vscode-dark img[src$=\#gh-light-mode-only],
.vscode-light img[src$=\#gh-dark-mode-only],
.vscode-high-contrast:not(.vscode-high-contrast-light) img[src$=\#gh-light-mode-only],
.vscode-high-contrast-light img[src$=\#gh-dark-mode-only] {
    display: none;
}

/* Base Body Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe WPC', 'Segoe UI', system-ui, 'Ubuntu', 'Droid Sans', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    padding-top: 50px;
}

/* Fixed Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #007D9C;
    padding: 10px 20px;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    color: #fff;
    border-bottom: none;
}

.header-nav {
    display: flex;
    gap: 10px;
}

.header-nav a {
    color: #fff;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.header-nav a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Task List Styles */
.task-list-item {
    list-style-type: none;
}

.task-list-item-checkbox {
    margin-left: -20px;
    vertical-align: middle;
    pointer-events: none;
}

/* Alert Color Variables (Light Mode) */
:root {
    --color-note: #0969da;
    --color-tip: #1a7f37;
    --color-warning: #9a6700;
    --color-severe: #bc4c00;
    --color-caution: #d1242f;
    --color-important: #8250df;
}

/* Alert Color Variables (Dark Mode) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-note: #2f81f7;
        --color-tip: #3fb950;
        --color-warning: #d29922;
        --color-severe: #db6d28;
        --color-caution: #f85149;
        --color-important: #a371f7;
    }
}

/* Markdown Alert Base Styles */
.markdown-alert {
    padding: 0.5rem 1rem;
    margin-bottom: 16px;
    color: inherit;
    border-left: .25em solid #888;
}

.markdown-alert>:first-child {
    margin-top: 0
}

.markdown-alert>:last-child {
    margin-bottom: 0
}

.markdown-alert .markdown-alert-title {
    display: flex;
    font-weight: 500;
    align-items: center;
    line-height: 1
}

.markdown-alert .markdown-alert-title .octicon {
    margin-right: 0.5rem;
    display: inline-block;
    overflow: visible !important;
    vertical-align: text-bottom;
    fill: currentColor;
}

/* Markdown Alert Types */
.markdown-alert.markdown-alert-note {
    border-left-color: var(--color-note);
}

.markdown-alert.markdown-alert-note .markdown-alert-title {
    color: var(--color-note);
}

.markdown-alert.markdown-alert-important {
    border-left-color: var(--color-important);
}

.markdown-alert.markdown-alert-important .markdown-alert-title {
    color: var(--color-important);
}

.markdown-alert.markdown-alert-warning {
    border-left-color: var(--color-warning);
}

.markdown-alert.markdown-alert-warning .markdown-alert-title {
    color: var(--color-warning);
}

.markdown-alert.markdown-alert-tip {
    border-left-color: var(--color-tip);
}

.markdown-alert.markdown-alert-tip .markdown-alert-title {
    color: var(--color-tip);
}

.markdown-alert.markdown-alert-caution {
    border-left-color: var(--color-caution);
}

.markdown-alert.markdown-alert-caution .markdown-alert-title {
    color: var(--color-caution);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #007D9C;
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 24px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top:hover {
    background-color: #005f7a;
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

#extitle {
    margin-top: 40px;
    border-top: 1px solid #333;
    padding-top: 20px;
}
/* Footer */
footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #007D9C;
    padding: 15px 20px;
    text-align: center;
    box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

footer a {
    color: #fff;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    font-weight: 500;
}

footer a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Exercicio Titles */
h3[id^='ex'] {
    padding-top: 80px;
    margin-top: -60px;
}

/* Gopher Images */
.gopher-relatorio {
    padding-top: 10px;
    float: right;
    width: 190px;
    margin-left: 20px;
    margin-bottom: 10px;
}

.gopher-exercicios {
    padding-top: 10px;
    float: right;
    width: 200px;
    margin-left: 20px;
    margin-bottom: 10px;
}

.gopher-banner {
    display: block;
    width: 100%;
    max-width: 800px;
    margin: 30px auto;
    border-radius: 8px;
}