/* --- Design tokens --- */
:root {
    --bg: #ffffff;
    --fg: #111827;
    --muted: #4b5563;
    --accent: #2563eb;
    --accent-darker: #2563eb;
    --accent-contrast: #ffffff;
    --surface: #e4e7eb;
    --ring: rgba(37, 99, 235, 0.35);
    --radius: 14px;
    --space: clamp(12px, 2.5vw, 28px);
    --maxw: 68ch;
    --hover-contrast: #ffffff;
    --hover: #02246d;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b0f13;
        --fg: #e5e7eb;
        --muted: #9ca3af;
        --accent: #60a5fa;
        --accent-darker: #2563eb;
        --accent-contrast: #0b0f13;
        --surface: #111827;
        --ring: rgba(96, 165, 250, 0.4);
        --hover-contrast: #2563eb;
        --hover: #dae9fc;
    }
}

/* --- Larger viewports: relax max width, keep readability --- */
@media (min-width: 768px) {
    :root {
        --maxw: 85ch;
    }
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}

/* --- CSS Reset-ish, mobile-first foundation --- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}
body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, "Noto Sans", "Liberation Sans", sans-serif;
    line-height: 1.6;
    font-size: clamp(16px, 1.2vw + 12px, 18px);
    color: var(--fg);
    background: var(--bg);
}

/* --- Headings ---  */
h1 {
    text-align: center;
    margin: 0 0 var(--space);
    line-height: 1.15;
    font-size: clamp(1.6rem, 3.5vw + 0.5rem, 2.6rem);
    letter-spacing: -0.01em;
}

h2 {
    margin: calc(var(--space) * 1.25) 0 var(--space) 0;
    font-size: clamp(1.25rem, 1.2vw + 1rem, 1.6rem);
}

/* --- Layout --- */
.center {
    width: min(100% - 2*var(--space), var(--maxw));
    margin-inline: auto;
    padding: calc(var(--space) * 1.25) 0 var(--space);
}

/* --- Media --- */
.imagebox {
    margin: 0 0 var(--space);
}

.header-img {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    background: var(--surface);
}

/* --- Buttons --- */
.buttonbox {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: var(--space);
}
a.button {
    transition: all .1s ease;
    display: inline-block;
    outline: none;
    cursor: pointer;
    font-weight: 600;
    border-radius: 3px;
    padding: 12px 24px;
    border: 0;
    color: #fff;
    background: var(--accent-darker);
    line-height: 1.15;
    font-size: 16px;
    text-decoration: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.28), 0 1px 2px rgba(0, 0, 0, 0.22);
}
a.button:hover {
    transition: all .1s ease;
    background: var(--hover);
    color: var(--hover-contrast);
}

/* --- Text blocks --- */
.authorboxbox {
    margin-bottom: 40px;
    font-size: 0.95em;
    color: var(--muted);
    margin-bottom: var(--space);
}
.abstract{
    text-align: justify;
    text-justify: inter-word;
    padding: 1rem;
    border-radius: var(--radius);
    background: var(--surface);
}
.authorbox,
.abstract,
p {
    color: var(--fg);
}

.title{
    margin-top: 50px;
    margin-bottom: 50px;
}
.break{
    height: 20px;
}
a{
    text-decoration: none;
    color: var(--accent);
}
.link:hover{
    color: var(--hover);
}


/* Code block (bibtex) */
code.language-bibtex {
    display: block;
    padding: 1rem;
    overflow-x: auto;
    border-radius: var(--radius);
    background: var(--surface);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 0.9em;
}