/* ══════════════════════════════════════════════════════════════════
   PENTESTING — LANDING PAGE
   Sober academic / technical-report aesthetic.
   Single centered column, near-monochrome, restrained link accent.
   Light + dark (prefers-color-scheme), reduced-motion aware.
   ══════════════════════════════════════════════════════════════════ */

:root {
    --bg:        #ffffff;
    --bg-soft:   #f7f7f5;
    --text:      #1b1b1b;
    --text-mute: #565656;
    --text-faint:#7a7a7a;
    --border:    #e3e3e0;
    --border-strong: #cfcfca;
    --accent:    #1a4d8f;   /* links only */
    --accent-visited: #5a3d8f;

    --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, "Times New Roman", ui-serif, serif;
    --mono:  ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;

    --measure: 800px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg:        #15171b;
        --bg-soft:   #1c1f24;
        --text:      #dcdee3;
        --text-mute: #a4a9b2;
        --text-faint:#7d838d;
        --border:    #2b2f36;
        --border-strong: #3a3f48;
        --accent:    #7fabe6;
        --accent-visited: #b79ce0;
    }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--serif);
    font-size: 18px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}
a:hover { border-bottom-color: currentColor; }
a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

code, kbd, samp, .mono { font-family: var(--mono); font-size: 0.86em; }

/* ── TOP NAV ────────────────────────────────────────────────────── */
.topnav {
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}
.topnav .row {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.wordmark {
    font-family: var(--mono);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--text);
    border-bottom: none;
}
.wordmark:hover { border-bottom: none; }
.navlinks {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.1rem;
    font-family: var(--mono);
    font-size: 0.82rem;
}
.navlinks a {
    color: var(--text-mute);
    border-bottom: none;
    white-space: nowrap;
}
.navlinks a:hover { color: var(--text); border-bottom: 1px solid currentColor; }

@media (max-width: 640px) {
    .topnav .row { height: auto; flex-direction: column; align-items: flex-start; padding-top: 0.7rem; padding-bottom: 0.7rem; }
    .navlinks { gap: 0.9rem; }
}

/* ── DOCUMENT COLUMN ────────────────────────────────────────────── */
.paper {
    max-width: var(--measure);
    margin: 0 auto;
    padding: 3.5rem 1.5rem 4rem;
}

.doc-head { margin-bottom: 2.5rem; }
h1.title {
    font-size: clamp(1.7rem, 4.2vw, 2.4rem);
    line-height: 1.22;
    font-weight: 600;
    letter-spacing: -0.01em;
}
.subtitle {
    margin-top: 0.7rem;
    color: var(--text-mute);
    font-size: 1.06rem;
    font-style: italic;
}
.byline {
    margin-top: 1.1rem;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-faint);
    line-height: 1.9;
}
.byline a { color: var(--text-mute); }

section.sec { margin-top: 2.6rem; }
h2 {
    font-size: 1.18rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1rem;
}
h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 1.6rem 0 0.6rem;
}
p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

.abstract {
    color: var(--text);
    font-size: 1.02rem;
}

/* Inline stat line */
.statline {
    font-family: var(--mono);
    font-size: 0.82rem;
    color: var(--text-mute);
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.8rem 1rem;
    line-height: 2;
    margin-bottom: 1.4rem;
}
.statline b { color: var(--text); font-weight: 600; }
.statline .div { color: var(--text-faint); margin: 0 0.5rem; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.2rem 0; }
table.data {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--mono);
    font-size: 0.82rem;
}
table.data caption {
    text-align: left;
    color: var(--text-faint);
    font-family: var(--serif);
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: 0.6rem;
}
table.data th, table.data td {
    text-align: right;
    padding: 0.45rem 0.7rem;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data thead th {
    color: var(--text-mute);
    font-weight: 600;
    border-bottom: 1px solid var(--border-strong);
}
table.data tbody tr:hover { background: var(--bg-soft); }
table.data td b { color: var(--text); font-weight: 600; }
table.data tfoot td {
    border-top: 1px solid var(--border-strong);
    border-bottom: none;
    color: var(--text-mute);
    padding-top: 0.6rem;
}

/* Figures */
figure.fig {
    margin: 1.8rem 0;
}
figure.fig img {
    display: block;
    width: 100%;
    max-width: 620px;
    height: auto;
    margin: 0 auto;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 3px;
}
figure.fig.wide img { max-width: 100%; }
figure.fig figcaption {
    margin-top: 0.6rem;
    font-size: 0.86rem;
    color: var(--text-mute);
    text-align: left;
}
figure.fig figcaption b { color: var(--text); font-weight: 600; }

ul.notes {
    list-style: none;
    padding: 0;
}
ul.notes li {
    position: relative;
    padding-left: 1.3rem;
    margin-bottom: 0.7rem;
    color: var(--text-mute);
    font-size: 0.98rem;
}
ul.notes li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--text-faint);
}
ul.notes b { color: var(--text); font-weight: 600; }

/* Footer */
.paper-foot {
    max-width: var(--measure);
    margin: 0 auto;
    padding: 1.6rem 1.5rem 3rem;
    border-top: 1px solid var(--border);
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-faint);
    line-height: 1.9;
}
.paper-foot a { color: var(--text-mute); }
.paper-foot .frow { display: flex; flex-wrap: wrap; gap: 1.1rem; margin-bottom: 0.5rem; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}
@media (prefers-color-scheme: dark) {
    /* graph SVGs have white backgrounds; keep a light frame so they read cleanly */
    figure.fig img { border-color: var(--border-strong); }
}