/* Academic manuscript styling */
:root {
    --text-color: #333;
    --bg-color: #fff;
    --accent-color: #2563eb;
    --border-color: #e5e7eb;
    --code-bg: #f3f4f6;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: 'Times New Roman', Times, Georgia, serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header and title */
header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

h1.title {
    font-size: 1.75rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.author {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

/* Section headings */
h1, h2, h3, h4, h5, h6 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.15rem; }
h4 { font-size: 1.05rem; }

/* Paragraphs */
p {
    margin-bottom: 1rem;
    text-align: justify;
    hyphens: auto;
}

/* Abstract */
.abstract {
    font-style: italic;
    background-color: #f9fafb;
    padding: 1.5rem;
    border-left: 4px solid var(--accent-color);
    margin: 2rem 0;
}

.abstract p:first-child::before {
    content: "Abstract: ";
    font-weight: bold;
}

/* Keywords */
.keywords {
    font-size: 0.95rem;
    color: #666;
    margin: 1rem 0;
}

/* Math equations */
.math {
    overflow-x: auto;
    padding: 0.5rem 0;
}

.math.display {
    text-align: center;
    margin: 1.5rem 0;
}

.equation-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.equation-number {
    font-size: 1rem;
    color: var(--text-color);
    min-width: 2rem;
    text-align: right;
}

/* Theorems and proofs */
.theorem, .lemma, .proposition, .corollary, .definition {
    background-color: #f8fafc;
    border-left: 4px solid var(--accent-color);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
}

.theorem-title, .lemma-title, .proposition-title {
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.proof {
    margin: 1rem 0;
    padding-left: 1rem;
    border-left: 2px solid var(--border-color);
}

/* Figures */
figure {
    margin: 2rem auto;
    text-align: center;
}

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

/* Side-by-side figures in a single figure container */
figure .center {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

figure .center img {
    max-width: 48%;
    flex: 1 1 45%;
}

figcaption {
    font-size: 0.9rem;
    color: #666;
    margin-top: 0.5rem;
    text-align: left;
    padding: 0 1rem;
}

/* Tables */
table {
    border-collapse: collapse;
    margin: 1.5rem auto;
    font-size: 0.95rem;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    text-align: left;
}

th {
    background-color: #f3f4f6;
    font-weight: bold;
}

/* References/Bibliography */
.references {
    font-size: 0.9rem;
}

#refs {
    margin-top: 3rem;
}

#refs::before {
    content: "References";
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
}

.references h2 {
    font-size: 1.3rem;
    margin-top: 3rem;
}

.csl-entry {
    margin-bottom: 0.75rem;
    padding-left: 2rem;
    text-indent: -2rem;
}

/* Links */
a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Appendix */
.appendix {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Supplementary materials */
.supplementary {
    background-color: #f9fafb;
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    body {
        padding: 1rem;
        font-size: 15px;
    }
    
    h1.title {
        font-size: 1.4rem;
    }
    
    .math.display {
        font-size: 0.9rem;
    }
}

/* Print styles */
@media print {
    body {
        max-width: none;
        padding: 0;
        font-size: 12pt;
    }
    
    a {
        color: inherit;
        text-decoration: none;
    }
}