/* ===========================================================
   Mohamed Alhaskir — Medical AI Researcher
   Clean two-column layout · sticky sidebar · light · navy accent
   =========================================================== */

:root {
    --navy: #1d3a8a;
    --navy-dark: #16306f;
    --ink: #16181d;
    --body: #3f4651;
    --muted: #717a87;
    --line: #e6e8ec;
    --line-soft: #eef0f3;
    --bg: #ffffff;
    --accent-soft: #eef2fb;
    --sidebar-w: 380px;
    --content-max: 760px;
    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--body);
    background: var(--bg);
    line-height: 1.7;
    font-size: 17px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a { color: inherit; }
strong { color: var(--ink); font-weight: 600; }

/* ---------- Layout shell ---------- */
.layout { display: flex; align-items: flex-start; max-width: 1700px; margin: 0 auto; }

/* ---------- Sidebar ---------- */
.sidebar {
    width: var(--sidebar-w); flex: 0 0 var(--sidebar-w);
    position: sticky; top: 0; height: 100vh;
    padding: 64px 48px;
    border-right: 1px solid var(--line);
}
.sidebar-inner { display: flex; flex-direction: column; justify-content: space-between; height: 100%; }
.eyebrow {
    text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.74rem;
    font-weight: 600; color: var(--navy); margin-bottom: 16px;
}
.sidebar h1 {
    font-family: var(--font-serif); font-weight: 600; color: var(--ink);
    font-size: 2.5rem; line-height: 1.05; letter-spacing: -0.02em;
}
.tagline { margin-top: 18px; font-size: 1rem; color: var(--body); max-width: 280px; }

.side-nav { margin-top: 40px; }
.side-nav ul { list-style: none; }
.side-nav li { margin: 2px 0; }
.side-link {
    display: inline-block; position: relative; padding: 4px 0 4px 0;
    color: var(--muted); text-decoration: none; font-size: 0.92rem; font-weight: 600;
    letter-spacing: 0.02em; transition: color .2s, padding .2s;
}
.side-link::before {
    content: ""; position: absolute; left: 0; top: 50%; width: 0; height: 1.5px;
    background: var(--ink); transition: width .25s; transform: translateY(-50%);
}
.side-link:hover { color: var(--ink); padding-left: 34px; }
.side-link:hover::before { width: 24px; }
.side-link.active { color: var(--ink); padding-left: 34px; }
.side-link.active::before { width: 24px; background: var(--navy); }

.sidebar-bottom { display: flex; flex-direction: column; gap: 22px; }
.side-contact { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.side-contact a { color: var(--muted); text-decoration: none; font-size: 0.88rem; transition: color .2s; word-break: break-word; }
.side-contact a:hover { color: var(--navy); }

.heritage { margin: 4px 0 0; display: flex; flex-direction: column; align-items: flex-start; gap: 7px; }
.heritage-logos { display: flex; align-items: center; gap: 14px; }
.aleppo-logo { width: 96px; height: auto; opacity: 0.9; }
.charlemagne-logo { width: 120px; height: auto; opacity: 0.9; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 11px 22px; border-radius: 7px; font-size: 0.9rem; font-weight: 600;
    text-decoration: none; transition: all .2s; cursor: pointer; border: 1px solid transparent;
    align-self: flex-start;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-dark); }

/* ---------- Content ---------- */
.content { flex: 1 1 auto; min-width: 0; padding: 72px 96px; max-width: none; }
.block { padding: 36px 0; }
.block:first-child { padding-top: 0; }
.block-title {
    font-family: var(--font-serif); font-weight: 600; color: var(--ink);
    font-size: 1.55rem; letter-spacing: -0.01em; margin-bottom: 30px;
    padding-bottom: 12px; border-bottom: 1px solid var(--line);
}
.block-title.sub { margin-top: 56px; }

/* ---------- About ---------- */
.about { display: block; }
.about-text p { margin-bottom: 18px; }
.interests { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 9px; }
.interests span {
    font-size: 0.83rem; font-weight: 500; color: var(--navy);
    background: var(--accent-soft); padding: 6px 13px; border-radius: 999px;
}

/* ---------- Entries ---------- */
.entries { display: flex; flex-direction: column; gap: 30px; }
.entry-head { display: flex; justify-content: space-between; align-items: baseline; gap: 18px; }
.entry-head h3 { font-size: 1.08rem; font-weight: 600; color: var(--ink); }
.entry-head h3 a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--line); transition: color .2s, border-color .2s; }
.entry-head h3 a:hover { color: var(--navy); border-color: var(--navy); }
.org { color: var(--muted); font-size: 0.9rem; margin-top: 3px; }
.date { color: var(--navy); font-size: 0.83rem; font-weight: 600; white-space: nowrap; }
.entry.compact { padding: 6px 0; }
.bullets { list-style: none; margin-top: 13px; }
.bullets li { position: relative; padding-left: 20px; margin-bottom: 10px; font-size: 0.97rem; }
.bullets li::before {
    content: ""; position: absolute; left: 0; top: 11px;
    width: 6px; height: 6px; border-radius: 50%; background: var(--navy);
}

/* ---------- Skills ---------- */
.skills { display: flex; flex-direction: column; }
.skill-row {
    display: grid; grid-template-columns: 210px 1fr; gap: 24px;
    padding: 20px 0; border-bottom: 1px solid var(--line-soft);
}
.skill-row:first-child { padding-top: 0; }
.skill-row:last-child { border-bottom: 0; padding-bottom: 0; }
.skill-row h3 { font-size: 0.98rem; font-weight: 600; color: var(--ink); }
.skill-row p { color: var(--body); font-size: 0.96rem; }

/* ---------- Publications ---------- */
.pubs { list-style: none; counter-reset: p; }
.pubs li {
    counter-increment: p; position: relative; padding: 18px 0 18px 44px;
    border-bottom: 1px solid var(--line-soft);
}
.pubs li:first-child { padding-top: 0; }
.pubs li:first-child::before { top: 0; }
.pubs li:last-child { border-bottom: 0; padding-bottom: 0; }
.pubs li::before {
    content: counter(p, decimal-leading-zero); position: absolute; left: 0; top: 18px;
    font-variant-numeric: tabular-nums; color: var(--muted); font-size: 0.92rem; font-weight: 600;
}
.pub-title { color: var(--ink); font-weight: 600; font-size: 1rem; line-height: 1.45; }
.pub-title a { color: inherit; text-decoration: none; transition: color .2s; }
.pub-title a:hover { color: var(--navy); text-decoration: underline; text-underline-offset: 3px; }
.pub-meta { color: var(--muted); font-size: 0.88rem; margin-top: 5px; }
.pubs-note { margin-top: 22px; font-size: 0.84rem; color: var(--muted); }
.pubs-note a { color: var(--navy); text-decoration: none; }
.pubs-note a:hover { text-decoration: underline; text-underline-offset: 3px; }
.tag {
    display: inline-block; margin-left: 6px; font-size: 0.7rem; font-weight: 600;
    color: var(--navy); background: var(--accent-soft); padding: 2px 9px; border-radius: 4px;
    vertical-align: middle;
}

/* ---------- Contact ---------- */
.contact-lede { font-size: 1.05rem; max-width: 560px; margin-bottom: 28px; }
.contact-list { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.contact-list a {
    background: #fff; padding: 18px 20px; text-decoration: none;
    display: flex; flex-direction: column; color: var(--ink); font-weight: 500;
    font-size: 0.95rem; transition: background .2s; word-break: break-word;
}
.contact-list a:hover { background: #fafbfc; }
.contact-list span {
    text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.68rem;
    color: var(--muted); font-weight: 600; margin-bottom: 6px;
}

/* ---------- Content footer ---------- */
.content-footer {
    margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line);
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;
}
.content-footer p { color: var(--muted); font-size: 0.88rem; }
.content-footer a { color: var(--muted); text-decoration: none; font-size: 0.88rem; transition: color .2s; }
.content-footer a:hover { color: var(--ink); }
.content-footer p a { font-size: inherit; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }

/* ---------- Legal page (Impressum) ---------- */
.legal { max-width: 760px; margin: 0 auto; padding: 72px 28px 96px; }
.legal .back { display: inline-block; margin-bottom: 28px; color: var(--navy); text-decoration: none; font-size: 0.9rem; font-weight: 600; }
.legal .back:hover { text-decoration: underline; text-underline-offset: 3px; }
.legal h1 { font-family: var(--font-serif); font-weight: 600; color: var(--ink); font-size: 2.2rem; letter-spacing: -0.01em; margin-bottom: 28px; }
.legal h2 { font-size: 1.02rem; font-weight: 600; color: var(--ink); margin: 28px 0 8px; }
.legal h2#datenschutz { font-family: var(--font-serif); font-size: 2.2rem; letter-spacing: -0.01em; margin: 0 0 28px; }
.legal p { color: var(--body); margin-bottom: 10px; }
.legal a { color: var(--navy); }
.legal .small { font-size: 0.88rem; color: var(--muted); margin-top: 40px; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- Mobile toggle (hidden on desktop) ---------- */
.nav-toggle {
    display: none;
    position: fixed; top: 16px; right: 16px; z-index: 100;
    width: 44px; height: 44px; padding: 0;
    background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
    cursor: pointer;
    flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle-bar {
    width: 20px; height: 2px; background: var(--ink); border-radius: 2px;
    transition: transform .2s, opacity .2s;
}
body.nav-open .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle-bar:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    :root { --sidebar-w: 300px; }
    .sidebar { padding: 48px 36px; }
    .sidebar h1 { font-size: 2.1rem; }
    .content { padding: 56px 44px; }
}

@media (max-width: 720px) {
    .layout { flex-direction: column; }
    .sidebar {
        position: static; width: 100%; flex-basis: auto; height: auto;
        border-right: 0; border-bottom: 1px solid var(--line);
        padding: 44px 28px 32px;
    }
    .sidebar-inner { display: block; }
    .sidebar h1 { font-size: 2.3rem; }
    .tagline { max-width: 520px; }
    .nav-toggle { display: flex; }
    .side-nav { display: none; margin-top: 26px; }
    body.nav-open .side-nav { display: block; }
    .side-nav ul { display: flex; flex-direction: column; gap: 4px; }
    .side-link { padding: 6px 0 !important; }
    .side-link::before { display: none; }
    .side-link:hover, .side-link.active { padding-left: 0; }
    .sidebar-bottom { margin-top: 28px; }
    .content { padding: 40px 28px; max-width: 100%; }
    .skill-row { grid-template-columns: 1fr; gap: 6px; }
    .contact-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    body { font-size: 16px; }
    .entry-head { flex-direction: column; gap: 4px; }
    .date { order: -1; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; }
}

/* ---------- Dark mode ---------- */
@media (prefers-color-scheme: dark) {
    :root {
        --navy: #8aa9ff;
        --navy-dark: #a8bfff;
        --ink: #e6edf3;
        --body: #c9d1d9;
        --muted: #8b949e;
        --line: #30363d;
        --line-soft: #21262d;
        --bg: #0e1116;
        --accent-soft: rgba(138, 169, 255, 0.12);
    }
    .aleppo-logo, .charlemagne-logo { filter: invert(0.92); opacity: 0.85; }
    .contact-list a { background: #161b22; }
    .contact-list a:hover { background: #1c2128; }
    .nav-toggle { background: #161b22; }
    .btn-primary { color: #0e1116; }
}

/* ---------- Print stylesheet ---------- */
@media print {
    @page { margin: 18mm; }
    body { font-size: 11pt; line-height: 1.5; color: #000; background: #fff; }
    .layout { display: block; max-width: none; }
    .sidebar {
        position: static; width: 100%; height: auto; padding: 0 0 24px;
        border-right: 0; border-bottom: 1px solid #999;
    }
    .sidebar-inner { display: block; }
    .sidebar h1 { font-size: 22pt; }
    .nav-toggle, .side-nav, .btn, .heritage, .reveal { display: none !important; }
    .reveal { opacity: 1 !important; transform: none !important; }
    .content { padding: 24px 0 0; max-width: none; }
    .block { padding: 12px 0; page-break-inside: avoid; }
    .block-title { font-size: 13pt; margin-bottom: 12px; padding-bottom: 4px; }
    .entry, .pubs li, .skill-row { page-break-inside: avoid; }
    .interests span, .tag { background: transparent; color: #000; border: 1px solid #999; }
    .contact-list { display: block; border: 0; }
    .contact-list a { background: transparent; padding: 4px 0; border: 0; }
    .content-footer, .pubs-note { display: none; }
    a { color: #000; text-decoration: none; }
}