/* =============================================================
   PRABHAV SINGH — Personal Website
   Inspired by orderedlist/minimal, custom design
   ============================================================= */

:root {
  --accent:       #db3e75;
  --accent-light: #fdf0f4;
  --text:         #2a2a2a;
  --text-muted:   #666;
  --bg:           #f5f4ef;
  --sidebar-bg:   #ffffff;
  --border:       #e5e2dc;
  --sidebar-w:    300px;
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

/* ── WRAPPER ── */
.ps-wrapper {
  display: flex;
  max-width: 1100px;
  margin: 0 auto;
  min-height: 100vh;
  box-shadow: 0 0 40px rgba(0,0,0,0.06);
}

/* ══════════════════════════════════════
   LEFT SIDEBAR
══════════════════════════════════════ */
.ps-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 36px 24px 28px;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
}

.ps-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  margin-bottom: 16px;
}

.ps-name {
  margin: 0 0 6px;
  line-height: 1.1;
}
.ps-name-first {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-sans);
  margin-bottom: 1px;
}
.ps-name-last {
  display: block;
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.01em;
  line-height: 1.05;
}

.ps-affil {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0 0 10px;
  line-height: 1.6;
}
.ps-affil a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.ps-affil a:hover { text-decoration: underline; }

.ps-email {
  font-size: 0.77rem;
  margin: 0 0 4px;
}
.ps-email a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px dotted;
}
.ps-email a:hover { color: var(--accent); }

/* Divider */
.ps-divider {
  height: 1px;
  background: var(--border);
  margin: 14px 0;
}

/* Nav */
.ps-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}
.ps-nav li { margin: 2px 0; }
.ps-nav a {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 10px;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 6px;
  transition: background 0.14s, color 0.14s;
}
.ps-nav a:hover  { background: var(--accent-light); color: var(--accent); }
.ps-nav a.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 700;
}
.ps-nav .nav-icon { font-size: 0.8rem; width: 16px; text-align: center; }

/* Social links */
.ps-social {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.ps-social a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  padding: 4px 9px;
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: all 0.14s;
}
.ps-social a:hover { border-color: var(--accent); color: var(--accent); }

/* Sidebar section label */
.ps-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* Sidebar recent updates */
.ps-updates {
  margin: 0;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.ps-update-item {
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
}
.ps-update-item:last-child { border-bottom: none; }
.ps-update-date {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  margin-bottom: 2px;
}
.ps-update-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ══════════════════════════════════════
   MAIN CONTENT
══════════════════════════════════════ */
.ps-main {
  flex: 1;
  min-width: 0;
  padding: 44px 52px 60px;
  background: #fff;
}

/* Typography */
.ps-main h1 {
  font-size: 1.55rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  line-height: 1.2;
  color: var(--text);
}

.ps-main h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin: 1rem 0 0.7rem;
  padding-bottom: 5px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.ps-main h3 {
  font-size: 0.97rem;
  font-weight: 600;
  margin: 1.4rem 0 0.35rem;
  color: var(--text);
}

.ps-main p {
  margin: 0 0 0.95rem;
  font-size: 0.92rem;
  color: #383838;
}

.ps-main a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.14s;
}
.ps-main a:hover { border-bottom-color: var(--accent); }

.ps-main strong { font-weight: 700; color: var(--text); }

.ps-main ul, .ps-main ol {
  padding-left: 1.3em;
  margin: 0.4rem 0 0.9rem;
}
.ps-main li {
  font-size: 0.92rem;
  margin-bottom: 0.25rem;
  color: #383838;
}

/* Float photo (index page) */
img.floatpic {
  float: right;
  width: 150px;
  border-radius: 8px;
  margin: 4px 0 18px 24px;
  border: 1px solid var(--border);
}

/* ── RESEARCH LIST — pink bold ── */
.research-list strong { color: var(--accent); }

/* ── RESEARCH INTERESTS (details/summary) ── */
details {
  margin: 0.55rem 0;
  padding: 10px 14px;
  background: #fafaf8;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  transition: background 0.15s;
}
details[open] { background: #fff; }
summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  list-style: none;
  user-select: none;
}
summary::-webkit-details-marker { display: none; }
summary::before {
  content: '▶ ';
  font-size: 0.65rem;
  color: var(--accent);
  margin-right: 3px;
}
details[open] summary::before { content: '▼ '; }

/* ── RECENT UPDATES ── */
.updates-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.update-item {
  display: flex;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
  font-size: 0.87rem;
}
.update-item:last-child { border-bottom: none; }
.update-date {
  color: var(--accent);
  font-weight: 700;
  white-space: nowrap;
  font-size: 0.79rem;
  min-width: 86px;
  padding-top: 2px;
  font-family: var(--font-mono);
}

/* ── PUBLICATIONS ── */
.pub-list { margin: 0.25rem 0 0; }

.pub-item {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}
.pub-item:last-child { border-bottom: none; }

.pub-title {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 4px;
}
.pub-title a {
  color: var(--accent) !important;
  border-bottom: none !important;
}
.pub-title a:hover { border-bottom: 1px solid var(--accent) !important; }

.pub-authors {
  font-size: 0.81rem;
  color: var(--text-muted);
  margin-bottom: 2px;
  line-height: 1.5;
}
.me { font-weight: 700; color: var(--text); }

.pub-venue {
  font-size: 0.79rem;
  color: #666;
  margin-bottom: 7px;
}

.pub-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
}
.pub-link {
  font-size: 0.69rem;
  font-weight: 600;
  padding: 2px 9px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: none !important;
  transition: all 0.14s;
}
.pub-link:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
.pub-award {
  font-size: 0.69rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 12px;
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid #f0b8cc;
}
.pub-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ── NOTES PAGE ── */
.notes-item {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.notes-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}
.notes-date  { margin-right: 10px; }
.notes-topic { color: var(--accent); font-weight: 600; }
.notes-item h3 { margin: 4px 0 6px; font-size: 1.02rem; }
.notes-item h3 a { color: var(--text) !important; border-bottom: none !important; }
.notes-item h3 a:hover { color: var(--accent) !important; }
.paper-ref { font-size: 0.83rem; color: var(--text-muted); font-style: italic; margin-bottom: 6px; }
.notes-excerpt { font-size: 0.87rem; color: #555; line-height: 1.55; }
.hidden { display: none; }

#notes-search {
  width: 100%;
  max-width: 460px;
  padding: 8px 14px;
  font-size: 0.88rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font-mono);
  background: #fff;
  color: var(--text);
  margin: 1rem 0 1.5rem;
}
#notes-search:focus { outline: none; border-color: var(--accent); }

/* ── READING NOTES GATE ── */
#rn-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 55vh;
}
.rn-gate-box {
  text-align: center;
  max-width: 340px;
  width: 100%;
  padding: 2.4rem 2rem;
  background: #fafaf8;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.rn-lock { font-size: 2rem; margin-bottom: 0.8rem; }
.rn-gate-box h2 { margin: 0 0 0.4rem; font-size: 1.1rem; }
.rn-gate-box p { font-size: 0.85rem; color: var(--text-muted); margin: 0 0 1.2rem; line-height: 1.5; }
#rn-pw {
  display: block;
  width: 100%;
  padding: 9px 12px;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-family: var(--font-mono);
  background: #fff;
  color: var(--text);
  margin-bottom: 0.7rem;
  box-sizing: border-box;
}
#rn-pw:focus { outline: none; border-color: var(--accent); }
#rn-btn {
  display: block;
  width: 100%;
  padding: 9px;
  font-size: 0.9rem;
  font-weight: 600;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: opacity 0.14s;
}
#rn-btn:hover { opacity: 0.85; }
#rn-err {
  display: none;
  margin-top: 0.75rem;
  font-size: 0.82rem;
  color: var(--accent);
}

/* ── READING NOTES (private) ── */
.private-banner {
  background: #fffbf0;
  border: 1px solid #f5df8e;
  border-radius: 6px;
  padding: 10px 16px;
  font-size: 0.83rem;
  color: #7a6200;
  margin-bottom: 2rem;
}
.rn-entry {
  margin-bottom: 1.6rem;
  padding: 16px 18px;
  background: #fafaf8;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
}
.rn-meta {
  font-size: 0.76rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 5px;
}
.rn-entry h3 { margin: 0 0 6px; font-size: 0.96rem; }
.rn-entry h3 a { color: var(--text) !important; border-bottom: none !important; }
.rn-entry h3 a:hover { color: var(--accent) !important; }
.rn-papers { font-size: 0.82rem; color: var(--text-muted); font-style: italic; }
.rn-excerpt { font-size: 0.86rem; color: #555; margin-top: 6px; line-height: 1.5; }

/* ── MISC/RANDOM ── */
.misc-section h3 {
  display: inline-block;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}

/* ── SHARED ── */
blockquote {
  margin: 1rem 0;
  padding: 10px 16px;
  border-left: 3px solid var(--accent);
  background: #fdf8fa;
  color: #555;
  font-size: 0.89rem;
}
blockquote p { margin: 0; }

code {
  font-family: var(--font-mono);
  font-size: 0.84em;
  background: #f0ede8;
  padding: 2px 5px;
  border-radius: 3px;
}
pre {
  background: #f0ede8;
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.85rem;
}
pre code { background: none; padding: 0; }

hr { border: none; border-top: 1px solid var(--border); margin: 1.8rem 0 1rem; }

/* Twitter embed */
.twitter-tweet { margin: 1.4rem 0 !important; }

/* ── RESPONSIVE ── */
@media (max-width: 760px) {
  .ps-wrapper { flex-direction: column; }

  .ps-sidebar {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 20px 18px;
  }

  .ps-social { margin-top: 12px; }
  .ps-main { padding: 28px 20px 40px; }
  img.floatpic { width: 100px; }
}