:root {
  --border:#2a2a2a;
  --muted:#9aa0a6;
  --bg:#0f0f10;
  --card:#151517;
  --text:#e8eaed;

  /* accent tokens (do not break existing colors) */
  --accent:#8ab4f8;
  --good:#34a853;

  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1050px; margin: 0 auto; padding: 18px; }

/* ------------------------------
   Topbar + Nav (mobile-ready)
------------------------------ */
.topbar {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(15,15,16,0.95);
  backdrop-filter: blur(6px);
}

.topbar-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}

.brand a { font-weight: 800; font-size: 18px; letter-spacing: 0.2px; }
.brand-mark { display:flex; align-items:center; gap:10px; }
.brand-mark .brand-title { display:flex; align-items:baseline; gap:6px; }
.brand-sub { color: rgba(255,255,255,0.55); font-size: 12px; line-height: 1; }

.nav { display:flex; align-items:center; gap:10px; }

/* Primary nav links (desktop) */
.nav-links {
  display:flex;
  align-items:center;
  gap: 10px;
  margin-right: 8px;
}
.nav-link {
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border-radius: 10px;
  color: rgba(255,255,255,0.78);
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 14px;
}
.nav-link:hover {
  text-decoration: none;
  border-color: rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.03);
  color: rgba(255,255,255,0.92);
}

/* Burger menu */
.nav-toggle {
  display: none;
  position: relative;
}
.nav-burger {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.04);
  cursor: pointer;
  color: rgba(255,255,255,0.85);
}
.nav-burger:hover {
  border-color: rgba(255,255,255,0.28);
  background: rgba(255,255,255,0.06);
}

/* Hidden checkbox controlling dropdown */
#nav-open { display:none; }

.nav-dropdown {
  display:none;
  position:absolute;
  right: 0;
  top: 48px;
  width: min(320px, calc(100vw - 36px));
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  background: rgba(21,21,23,0.98);
  box-shadow: var(--shadow);
  overflow: hidden;
}

#nav-open:checked + label + .nav-dropdown { display:block; }

.nav-dropdown a {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  padding: 12px 14px;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.85);
  text-decoration: none;
}
.nav-dropdown a:first-child { border-top: none; }
.nav-dropdown a:hover {
  background: rgba(255,255,255,0.05);
}
.nav-dropdown .dd-muted {
  font-size: 12px;
  color: rgba(255,255,255,0.55);
}

/* Notification */
.notif-link { position: relative; }
.notif-link .badge {
  position: absolute;
  top: -4px;
  right: -6px;
  font-size: 0.7rem;
}

/* Avatar button */
.nav-avatar{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.04);
  overflow:hidden;
  transition:border-color .15s ease, box-shadow .15s ease;
}
.nav-avatar img{ width:100%; height:100%; object-fit:cover; }
.nav-avatar:hover,
.nav-avatar:focus-visible{
  border-color:rgba(255,255,255,.28);
  box-shadow:0 0 0 3px rgba(255,255,255,.06);
  outline:none;
}

/* Responsive nav behavior */
@media (max-width: 860px) {
  .nav-links { display:none; }
  .nav-toggle { display:block; }
}

/* ------------------------------
   Buttons
------------------------------ */
.btn {
  display:inline-block;
  padding:10px 12px;
  border:1px solid var(--border);
  border-radius:10px;
  background: transparent;
  color: var(--text);
}
.btn:hover { border-color:#4b4b4b; text-decoration:none; }
.btn.primary { border-color: var(--accent); }
.btn.small { padding:7px 10px; border-radius:9px; font-size: 13px; }

.linkbtn { background:none; border:none; color: var(--accent); cursor:pointer; padding:0; }
.linkbtn:hover { text-decoration: underline; }

/* ------------------------------
   Layout primitives
------------------------------ */
.pagehead { margin: 14px 0 14px; }
.pagehead h1 { margin: 0 0 6px; }

.actions { margin-top: 10px; display:flex; gap:10px; flex-wrap:wrap; }

.hero {
  padding: 22px;
  border:1px solid var(--border);
  border-radius:14px;
  background: var(--card);
}
.hero h1 { margin:0 0 8px; }
.hero-actions { margin-top: 12px; display:flex; gap:10px; flex-wrap:wrap; }

.grid2 { display:grid; grid-template-columns: 1fr 1fr; gap:14px; margin-top: 14px; }
@media (max-width: 900px) { .grid2 { grid-template-columns: 1fr; } }

.card {
  border:1px solid var(--border);
  border-radius:14px;
  padding: 16px;
  background: var(--card);
}
.card h2 { margin: 0 0 10px; }
.card h3 { margin: 16px 0 8px; }

.muted { color: var(--muted); font-size: 13px; }
.small { font-size: 12px; }

.list { list-style: none; padding:0; margin:0; }
.list li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.list li:last-child { border-bottom: none; }

.badge {
  display:inline-block;
  margin-left:8px;
  padding:2px 8px;
  border:1px solid var(--border);
  border-radius:999px;
  font-size:12px;
  color: var(--muted);
}
.badge.good { border-color: var(--good); color:#b7f7c2; }
.badge.good:hover { text-decoration: underline; }

.messages { margin: 10px 0 14px; display:grid; gap:8px; }
.message { padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border); background: #121214; }
.message.success { border-color: var(--good); }
.message.error { border-color: #ea4335; }

.content { line-height: 1.55; }
pre { overflow:auto; background:#0b0b0c; border:1px solid var(--border); padding: 10px; border-radius: 12px; }

input, textarea, select {
  width:100%;
  padding:10px;
  border-radius: 12px;
  border:1px solid var(--border);
  background: #0b0b0c;
  color: var(--text);
}
form p { margin: 0 0 10px; }

.search { display:flex; gap:10px; align-items:center; }
.search input { flex:1; min-width: 0; }

/* Footer */
.footer { border-top:1px solid var(--border); margin-top: 24px; }

/* ------------------------------
   Home page (message: lonely -> shared)
------------------------------ */
.home-top {
  display: grid;
  grid-template-columns: 1fr minmax(420px, 1.2fr) auto;
  gap: 14px;
  align-items: end;
  margin: 14px 0 16px;
}

@media (max-width: 980px) {
  .home-top { grid-template-columns: 1fr; align-items: start; }
  .home-auth { justify-self: start; }
}

.home-title {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.home-subtitle {
  margin-top: 8px;
  color: rgba(255,255,255,0.72);
  line-height: 1.5;
  max-width: 70ch;
}

.home-subtitle strong {
  color: rgba(255,255,255,0.92);
  font-weight: 750;
}

.home-search {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.home-search input[type="text"] {
  flex: 1;
  min-width: 280px;
  max-width: 760px;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.03);
  color: rgba(255,255,255,0.92);
  outline: none;
}

.home-search input[type="text"]:focus {
  border-color: rgba(255,255,255,0.30);
  background: rgba(255,255,255,0.05);
}

.home-search input[type="text"]::placeholder {
  color: rgba(255,255,255,0.45);
}

/* Quicklinks under hero */
.home-quicklinks {
  margin-top: 10px;
  display:flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items:center;
}
.home-quicklinks a {
  color: rgba(255,255,255,0.72);
  font-size: 13px;
  border-bottom: 1px solid rgba(255,255,255,0.18);
  padding-bottom: 1px;
}
.home-quicklinks a:hover {
  color: rgba(255,255,255,0.92);
  border-bottom-color: rgba(255,255,255,0.35);
  text-decoration:none;
}
.home-dot { color: rgba(255,255,255,0.35); }

/* Home grid */
.home-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 14px;
}
@media (max-width: 980px) { .home-grid { grid-template-columns: 1fr; } }

/* Home list styling */
.home-list { list-style: none; padding: 0; margin: 0; }
.home-item {
  padding: 10px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.home-item:first-child { border-top: none; }
.home-item-title { font-weight: 650; line-height: 1.35; }

/* ------------------------------
   Onboarding component (moved from inline)
------------------------------ */
.onboarding { position: relative; overflow: hidden; }
.onboarding::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 320px at 8% 0%, rgba(99,102,241,0.18), transparent 60%),
    radial-gradient(720px 260px at 92% 15%, rgba(16,185,129,0.14), transparent 55%);
  pointer-events: none;
}
.onboarding > * { position: relative; }

.onboarding-head {
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 12px;
}

.onboarding-pill {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
}

.onboarding-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.step {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}
.step:hover {
  transform: translateY(-1px);
  border-color: rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.045);
}

.step-badge {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 750;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05);
}

.step-title {
  display:flex;
  align-items:center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.step-tag {
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
}
.step-tag.good {
  border-color: rgba(16,185,129,0.35);
  background: rgba(16,185,129,0.10);
}

.onboarding-footer {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.onboarding-cta { display:flex; gap: 8px; flex-wrap: wrap; }

/* ------------------------------
   Paper list header (existing behavior, cleaned)
------------------------------ */
.pagehead {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.pagehead h1 { flex-shrink: 0; }

.pagehead-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}

.search {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 260px;
  max-width: 760px;
}

.search input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.03);
  color: rgba(255,255,255,0.92);
  outline: none;
}

.search input:focus {
  border-color: rgba(255,255,255,0.32);
  background: rgba(255,255,255,0.06);
}

/* Paper detail pagehead (kept compatible) */
.pagehead{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:18px;
}
.pagehead-main{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.pagehead-actions{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

@media (min-width: 768px){
  .pagehead{ gap:14px; }
}

/* Read highlight (existing) */
.anchor-read {
  background: rgba(16,185,129,0.08);
  border-radius: 10px;
  padding: 8px;
}
  /* --- Papers page header layout --- */

.pagehead-papers{
  display:flex;
  flex-direction:column;
  align-items:flex-start; /* LEFT align everything */
  gap:12px;
  margin-bottom:14px;
}

.pagehead-papers h1{
  margin:0;
}

.pagehead-desc{
  max-width: 72ch;
  line-height:1.5;
}

/* Wide search area */
.pagehead-searchwide{
  width:100%;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}

/* Search form takes most space */
.search-wide{
  width:100%;
  max-width: 80%;
  display:flex;
  gap:10px;
}

/* Input fills available width */
.search-wide input{
  flex:1;
  min-width:0;
}

/* Mobile adjustments */
@media (max-width: 900px){
  .search-wide{
    max-width:100%;
  }

  .pagehead-searchwide{
    gap:8px;
  }
}

.btn.danger{
  border-color: rgba(234,67,53,0.55);
  background: rgba(234,67,53,0.10);
}
.btn.danger:hover{
  border-color: rgba(234,67,53,0.85);
  background: rgba(234,67,53,0.16);
}