/* ============================================================
   Nareg Megan — personal site
   Palette: Midnight Indigo + Violet
   ============================================================ */

:root {
    --bg:        #0f1020;
    --bg-elev:   #16172a;
    --bg-elev-2: #1a1b2e;
    --text:      #dcdcec;
    --muted:     #8888a8;
    --accent:    #a78bfa;
    --accent-2:  #7c8cff;
    --border:    #2d2e44;
    --code-bg:   #1a1b2e;
    --code-text: #e7e7f5;
    --mono: 'SFMono-Regular', 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;
    --maxw: 720px;
}

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

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg);
    background-image:
        radial-gradient(900px 500px at 80% -10%, rgba(167, 139, 250, 0.10), transparent 60%),
        radial-gradient(700px 500px at -10% 0%, rgba(124, 140, 255, 0.08), transparent 55%);
    background-attachment: fixed;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ---------- header / nav ---------- */

header {
    padding: 1.5rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}

nav {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    align-items: baseline;
}

nav a {
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
}

nav a.name {
    color: #ffffff;
    font-size: 2.0rem;
    font-weight: 600;
    margin-right: 1rem;
    letter-spacing: -0.01em;
}

nav.headernav {
    display: flex;
    justify-content: center;
}

nav a:hover { color: var(--accent); }

nav a.name:hover { color: #ffffff; }

/* ---------- layout ---------- */

main {
    max-width: var(--maxw);
    padding: 2rem;
    margin: 0 auto;
}

.content { margin-bottom: 3rem; }

.content p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text);
    padding-bottom: 30px;
}

.content h3 {
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 300;
    margin-bottom: 0.1rem;
}
.content h5 { color: var(--muted); font-weight: 500; margin-bottom: 0.6rem; }

.content ul { margin: 0 0 30px 1.2rem; }
.content li {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--muted);
    margin-bottom: 0.5rem;
}
.content li:last-child { margin-bottom: 0; }
.content li::marker { color: var(--accent); }

.content a {
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 300;
    text-decoration: none;
    transition: color 0.2s;
}

.content a:hover { color: var(--accent); }

.desc { color: var(--muted) !important; }

/* featured writeup entries on the projects page */
.entry { padding-bottom: 30px; }
.entry .title-row {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.6rem;
}
.tag {
    font-family: var(--mono);
    font-size: 0.66rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 999px;
    padding: 0.1rem 0.5rem;
    position: relative;
    top: -1px;
}
.entry .desc { padding-bottom: 0 !important; margin-top: 0.4rem; }
.content a.readmore {
    font-size: 0.85rem;
    color: var(--accent);
    display: inline-block;
    margin-top: 0.5rem;
}
.content a.readmore:hover { color: #ffffff; }

/* ---------- home hero / avatar ---------- */

.hero {
    margin-bottom: 2.5rem;
}

/* "Hello!" + first paragraph sit beside the avatar; remaining text runs full width below */
.intro-lead {
    display: flex;
    align-items: center;
    gap: 1.8rem;
}

.intro-lead-text { flex: 1; min-width: 0; }
.intro-lead-text .intro-label { margin-top: 0; }
.intro-lead p { padding-bottom: 0; }

.avatar {
    flex: 0 0 auto;
    width: 132px;
    height: 132px;
    border-radius: 50%;
    background-color: var(--bg-elev-2);
    background-image: url('media/prof_pic.png');
    background-size: cover;
    background-position: center;
    border: 3px solid var(--accent);
    box-shadow: 0 0 0 6px rgba(167, 139, 250, 0.12),
                0 8px 30px rgba(0, 0, 0, 0.45);
    position: relative;
    overflow: hidden;
}

/* fallback initials shown until a real photo is dropped in */
.avatar::after {
    content: 'NM';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.6rem;
    font-weight: 600;
    color: var(--muted);
    background: linear-gradient(150deg, var(--bg-elev), var(--bg-elev-2));
    z-index: -1;
}

.hero .intro { font-size: 1.05rem; line-height: 1.75; }
.hero .intro p + p { margin-top: 0.9rem; }

/* small section label, styled after the mono .tag pill (sans the border) */
.intro-label {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 1.6rem 0 0.6rem;
}

@media (max-width: 560px) {
    /* stack avatar on top as a profile header, with "Hello!" + intro below */
    .intro-lead { flex-direction: column-reverse; align-items: stretch; gap: 1.4rem; }
    .avatar { width: 120px; height: 120px; align-self: center; }
}

/* ---------- footer links / contact ---------- */

.contact {
    display: flex;
    justify-content: center;
    color: var(--muted);
    margin-top: 0.5rem;
}

.links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.links a.text-link {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

.links a.text-link:hover { color: #ffffff; }

/* social icons: SVGs are filled in the violet accent (#a78bfa) */
.links a img {
    display: inline-block;
    opacity: 0.85;
    transition: opacity 0.2s, transform 0.15s;
}

.links a:hover img {
    opacity: 1;
    transform: translateY(-1px);
}

/* ============================================================
   Sidebar table of contents (pages with class .has-toc on main)
   ============================================================ */

/* widen main into a 2-column [rail | content] layout, content stays 720px */
main.has-toc {
    max-width: 1012px;
    display: flex;
    align-items: flex-start;
    gap: 3rem;
}

.has-toc .page-col {
    flex: 1;
    min-width: 0;
    max-width: var(--maxw);
}

.toc-rail {
    position: sticky;
    top: 2rem;
    flex: 0 0 180px;
    align-self: flex-start;
}

.toc-head {
    display: block;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.9rem;
}

.toc-nav { display: flex; flex-direction: column; gap: 0.55rem; }

.toc-nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.85rem;
    line-height: 1.4;
    border-left: 2px solid var(--border);
    padding-left: 0.7rem;
    transition: color 0.2s, border-color 0.2s;
}

.toc-nav a:hover { color: var(--accent); border-left-color: var(--accent); }

/* keep jumped-to sections clear of the top edge */
.content [id] { scroll-margin-top: 1.5rem; }

/* no room for the rail: hide it, content re-centers exactly as before */
@media (max-width: 1012px) {
    main.has-toc { display: block; max-width: var(--maxw); }
    .toc-rail { display: none; }
}

/* ============================================================
   Blog / long-form article styling
   ============================================================ */

.post h1 {
    font-size: 1.9rem;
    line-height: 1.25;
    color: #ffffff;
    letter-spacing: -0.015em;
    margin-bottom: 0.4rem;
}

.post-meta {
    color: var(--muted);
    font-size: 0.85rem;
    margin-bottom: 1.8rem;
    padding-bottom: 1.2rem;
    border-bottom: 1px solid var(--border);
}

.post h2 {
    font-size: 1.4rem;
    color: #ffffff;
    margin: 2.4rem 0 0.8rem;
    padding-top: 0.4rem;
}

.post h3 {
    font-size: 1.12rem;
    color: var(--accent);
    margin: 1.8rem 0 0.6rem;
}

.post h3.topic {
    color: var(--accent-2);
    border-left: 3px solid var(--accent-2);
    padding-left: 0.7rem;
}

.post p {
    font-size: 0.96rem;
    line-height: 1.8;
    margin-bottom: 1.1rem;
    color: var(--text);
}

.post a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(167, 139, 250, 0.35);
    transition: color 0.2s, border-color 0.2s;
    word-break: break-word;
}

.post a:hover { color: #ffffff; border-bottom-color: #ffffff; }

/* inline code */
.post code,
.content code {
    font-family: var(--mono);
    font-size: 0.86em;
    background: var(--code-bg);
    color: var(--code-text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.1em 0.4em;
    word-break: break-word;
}

/* fenced code blocks */
pre.code, pre.data, pre.diagram {
    font-family: var(--mono);
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.1rem;
    margin: 1.1rem 0;
    overflow-x: auto;
    font-size: 0.84rem;
    line-height: 1.55;
}

pre.code {
    border-left: 3px solid var(--accent);
}

pre.code code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
    color: var(--code-text);
}

/* benchmark / shape data — subtler than code */
pre.data {
    color: #b9c0e0;
    border-left: 3px solid var(--accent-2);
    background: rgba(124, 140, 255, 0.06);
}

/* aligned diagrams / hierarchy listings */
pre.diagram {
    color: #c5c8e8;
    background: var(--bg-elev);
    border-style: dashed;
}

/* >> call-out notes */
.post p.note {
    background: var(--bg-elev);
    border-left: 3px solid var(--accent);
    border-radius: 0 6px 6px 0;
    padding: 0.7rem 1rem;
    margin: 0.7rem 0;
    color: #cfd2ec;
    font-size: 0.92rem;
}

/* --- aside callouts (between standalone ---) */
.post aside.callout {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.6rem 1.1rem;
    margin: 1.1rem 0;
}

.post aside.callout p {
    font-size: 0.9rem;
    color: var(--muted);
    margin: 0.6rem 0;
}

/* glossary cross-reference + reference numbers */
.xref {
    color: var(--muted);
    font-size: 0.85em;
    border-bottom: 1px dotted var(--muted);
    white-space: nowrap;
}
.xref:hover { color: var(--accent); }

sup.refnum { color: var(--accent-2); font-size: 0.72em; }
sup.refnum:hover { color: var(--accent); }

/* lists (global padding reset means we re-add indentation here) */
.post ul, .post ol { margin: 0 0 1.1rem 1.5rem; }
.post li { margin-bottom: 0.45rem; line-height: 1.75; font-size: 0.96rem; }
.post li::marker { color: var(--accent); }

/* ---------- LLM prompt / response exchange ---------- */

.exchange { margin: 1.2rem 0; }

.turn {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.9rem 1.1rem;
    margin-bottom: 0.8rem;
}

.turn .role {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
}

.turn.user { border-left: 3px solid var(--accent-2); }
.turn.user .role { color: var(--accent-2); background: rgba(124, 140, 255, 0.12); }

.turn.assistant { border-left: 3px solid var(--accent); }
.turn.assistant .role { color: var(--accent); background: rgba(167, 139, 250, 0.12); }

.turn p { font-size: 0.92rem; margin-bottom: 0.6rem; }
.turn p:last-child { margin-bottom: 0; }

/* ---------- blog bar (back link + github) ---------- */

.blogbar {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.8rem;
    font-size: 0.88rem;
    margin-bottom: 1.6rem;
}

.blogbar.standalone { justify-content: flex-start; margin: 1.4rem 0 0.6rem; }

.blogbar a {
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
}

.blogbar a:hover { color: var(--accent); }

/* ---------- prev / next pager ---------- */

.pager {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin: 2.5rem 0 1rem;
    padding-top: 1.4rem;
    border-top: 1px solid var(--border);
}

.pager a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.92rem;
    transition: color 0.2s;
}

.pager a:hover { color: #ffffff; }
.pager .pgnext { margin-left: auto; text-align: right; }

/* ---------- table of contents (blog index) ---------- */

.toc { display: flex; flex-direction: column; gap: 0.7rem; margin-top: 1rem; }

.toc-entry {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.2rem;
    text-decoration: none;
    transition: border-color 0.2s, transform 0.15s, background 0.2s;
}

.toc-entry:hover {
    border-color: var(--accent);
    background: var(--bg-elev-2);
    transform: translateY(-2px);
}

.toc-num {
    font-family: var(--mono);
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 600;
    flex: 0 0 auto;
}

.toc-body { display: flex; flex-direction: column; gap: 0.25rem; }
.toc-title { color: #ffffff; font-size: 1.05rem; font-weight: 500; }
.toc-desc { color: var(--muted); font-size: 0.88rem; line-height: 1.55; }

/* ---------- small screens ---------- */

@media (max-width: 600px) {
    header { padding: 1.2rem 1.2rem; }
    main { padding: 1.4rem; }
    nav { gap: 1.1rem; }
    nav a.name { font-size: 1.6rem; }
    .post h1 { font-size: 1.55rem; }
    .post h2 { font-size: 1.25rem; }
    pre.code, pre.data, pre.diagram { font-size: 0.78rem; }
}