/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Body */
body {
    font-family: 'Kumbh Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #0d1117;
    color: #c9d1d9;
    line-height: 1.6;
    padding: 20px 30px;
}

/* Container */
.container {
    max-width: 100%;
    margin: 0 auto;
}

/* Header */
header {
    margin-bottom: 30px;
    text-align: center;
}

header h1 {
    font-size: 3em;
    margin-bottom: 10px;
    color: #c9d1d9;
}

.session-label {
    font-size: 1em;
    color: #8b949e;
    margin-bottom: 6px;
}

.subtitle {
    font-size: 1.2em;
    color: #8b949e;
}

/* Main */
main {
    padding: 0;
}

/* Topic sections */
.topic {
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 2px solid #30363d;
}

.topic:last-child {
    border-bottom: none;
}

/* Section titles */
h2 {
    color: #a78bfa;
    font-size: 2.2em;
    margin-bottom: 25px;
    font-weight: 600;
}

/* Sub-section titles */
h4 {
    color: #c9d1d9;
    font-size: 1.2em;
    margin-top: 0;
    margin-bottom: 12px;
    font-weight: 600;
}

/* Paragraphs */
p {
    margin-bottom: 15px;
    color: #c9d1d9;
}

/* Lists */
ol, ul {
    margin-left: 25px;
    margin-bottom: 20px;
}

li {
    margin-bottom: 10px;
    color: #c9d1d9;
}

/* Inline code */
code {
    background-color: #161b22;
    color: #79c0ff;
    padding: 3px 8px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.95em;
}

/* Fake button */
.fake-button {
    background-color: #ffffff;
    color: #0969da;
    padding: 1px 4px;
    border: 1px solid #d0d7de;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.85em;
    font-weight: 600;
    cursor: default;
    display: inline-block;
}

/* Info boxes */
.info-box {
    background-color: #1c2128;
    border-left: 4px solid #58a6ff;
    padding: 15px 20px;
    margin: 25px 0;
    border-radius: 4px;
}

.info-box h4 {
    color: #58a6ff;
    margin-top: 0;
}

.info-box ul, .info-box ol {
    margin-top: 10px;
}

.info-box p {
    color: #c9d1d9;
}

/* Note boxes */
.note {
    background-color: #1c2128;
    border-left: 4px solid #f0ad4e;
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.note strong {
    color: #f0ad4e;
}

/* Bold text */
strong {
    color: #fff;
    font-weight: 600;
}

/* Links */
a {
    color: #a78bfa;
    text-decoration: none;
    font-weight: 600;
}

a:hover {
    text-decoration: underline;
}

/* Closing section - green accent */
.closing .info-box {
    border-left-color: #3fb950;
}

.closing .info-box h4 {
    color: #3fb950;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 20px 15px;
    }

    header h1 {
        font-size: 2.2em;
    }

    h2 {
        font-size: 1.8em;
    }
}