/* =========================================================
   QUORUM — Research publishing platform
   Design tokens
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* colors */
  --bg: #F6F7F4;
  --bg-alt: #ECEEE6;
  --surface: #FFFFFF;
  --ink: #14181F;
  --ink-soft: #545F6B;
  --ink-faint: #8A9199;
  --line: #DBDECF;
  --line-strong: #C3C7B8;

  --indigo: #2B3A67;
  --indigo-deep: #16203D;
  --indigo-soft: #E7EAF2;

  --amber: #B98526;
  --amber-deep: #8F6414;
  --amber-soft: #F3E4C3;

  --teal: #3F6357;
  --teal-soft: #E3ECE7;

  --danger: #9C3B3B;

  /* type */
  --font-display: 'Fraunces', 'Iowan Old Style', serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', monospace;

  /* layout */
  --max: 1180px;
  --radius: 3px;
  --shadow-card: 0 1px 2px rgba(20,24,31,0.04), 0 6px 20px -8px rgba(20,24,31,0.10);
  --shadow-card-hover: 0 2px 6px rgba(20,24,31,0.06), 0 14px 32px -10px rgba(20,24,31,0.16);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ font-family: var(--font-display); margin:0; font-weight:600; letter-spacing:-0.01em; }
p{ margin:0; }
button{ font-family: inherit; cursor:pointer; }
input, textarea, select{ font-family: inherit; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior:auto !important; }
}

:focus-visible{
  outline: 2px solid var(--indigo);
  outline-offset: 2px;
}

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

/* =========================================================
   NAV
   ========================================================= */
.nav{
  position: sticky; top:0; z-index: 50;
  background: rgba(246,247,244,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav__row{
  display:flex; align-items:center; justify-content:space-between;
  height: 72px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-display); font-weight:700; font-size:1.3rem;
  color: var(--indigo-deep);
}
.brand__mark{
  width:30px; height:30px; border-radius:2px;
  background: var(--indigo-deep);
  color:#fff; display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono); font-size: 0.7rem; font-weight:600;
  transform: rotate(-4deg);
}
.nav__links{ display:flex; align-items:center; gap:32px; }
.nav__links a{
  font-size: 0.94rem; color: var(--ink-soft); font-weight:500;
  transition: color .15s ease;
}
.nav__links a:hover{ color: var(--indigo-deep); }
.nav__links a.active{ color: var(--indigo-deep); }
.nav__actions{ display:flex; align-items:center; gap:12px; }
.nav__toggle{
  display:none; background:none; border:none; width:36px; height:36px;
  flex-direction:column; justify-content:center; gap:5px; align-items:center;
}
.nav__toggle span{ width:20px; height:2px; background: var(--ink); display:block; }

/* =========================================================
   BUTTONS
   ========================================================= */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 12px 22px; border-radius: var(--radius); font-weight:600; font-size:0.92rem;
  border: 1px solid transparent; transition: transform .12s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{ background: var(--indigo-deep); color:#fff; }
.btn-primary:hover{ background: var(--indigo); }
.btn-amber{ background: var(--amber); color:#fff; }
.btn-amber:hover{ background: var(--amber-deep); }
.btn-ghost{ background:transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover{ border-color: var(--indigo-deep); color: var(--indigo-deep); }
.btn-text{ background:none; padding: 6px 0; color: var(--indigo-deep); font-weight:600; }
.btn-text:hover{ text-decoration: underline; }
.btn-sm{ padding: 8px 14px; font-size:0.82rem; }
.btn-block{ width:100%; }
.btn-danger-ghost{ background:transparent; border-color: var(--danger); color: var(--danger); }

/* =========================================================
   CATALOG STAMP — signature element
   ========================================================= */
.stamp{
  display:inline-flex; align-items:center; gap:6px;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing:0.04em;
  background: var(--amber); color:#fff;
  padding: 3px 9px; border-radius: 2px;
  transform: rotate(-2deg);
  box-shadow: 0 2px 0 rgba(0,0,0,0.06);
}
.stamp::before{ content:"Q·"; opacity:0.8; }
.stamp.stamp-teal{ background: var(--teal); transform: rotate(1.5deg); }
.stamp.stamp-teal::before{ content: "✓ "; font-family: var(--font-body); }
.stamp.stamp-ghost{ background: transparent; border:1px dashed var(--line-strong); color: var(--ink-faint); transform: rotate(0deg); }

/* =========================================================
   HERO
   ========================================================= */
.hero{
  padding: 76px 0 60px;
  overflow: hidden;
}
.hero__grid{
  display:grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items:center;
}
.eyebrow{
  font-family: var(--font-mono); font-size:0.78rem; letter-spacing:0.08em; text-transform: uppercase;
  color: var(--teal); display:flex; align-items:center; gap:10px; margin-bottom:18px;
}
.eyebrow::before{ content:""; width:26px; height:1px; background: var(--teal); display:block; }
.hero h1{
  font-size: clamp(2.4rem, 4.4vw, 3.6rem);
  line-height: 1.06;
  color: var(--indigo-deep);
  max-width: 12ch;
}
.hero h1 em{ font-style: italic; color: var(--amber); }
.hero p.lead{
  margin-top: 22px; font-size: 1.08rem; color: var(--ink-soft); max-width: 44ch;
}
.hero__actions{ display:flex; gap:16px; margin-top: 34px; flex-wrap:wrap; }

.hero__visual{ position:relative; height: 400px; }
.card-fan{
  position:absolute; width: 260px; background: var(--surface);
  border:1px solid var(--line); border-radius: 4px; padding:20px;
  box-shadow: var(--shadow-card);
}
.card-fan h4{ font-size:0.98rem; line-height:1.3; margin: 10px 0 8px; }
.card-fan p{ font-size:0.8rem; color: var(--ink-soft); }
.card-fan .stamp{ font-size:0.65rem; }
.card-fan.f1{ top: 10px; left: 6%; transform: rotate(-7deg); z-index:1; }
.card-fan.f2{ top: 60px; left: 30%; transform: rotate(3deg); z-index:2; }
.card-fan.f3{ top: 20px; left: 52%; transform: rotate(-2deg); z-index:3; }

.stats-bar{
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 30px 0;
}
.stats-bar .container{
  display:grid; grid-template-columns: repeat(4,1fr); gap: 20px;
}
.stat b{
  display:block; font-family: var(--font-display); font-size:2rem; color: var(--indigo-deep);
}
.stat span{ font-size:0.85rem; color: var(--ink-soft); }

/* =========================================================
   SECTIONS
   ========================================================= */
.section{ padding: 72px 0; }
.section-alt{ background: var(--bg-alt); }
.section__head{
  display:flex; align-items:flex-end; justify-content:space-between; margin-bottom: 40px; gap: 24px; flex-wrap:wrap;
}
.section__head h2{ font-size: clamp(1.6rem, 2.6vw, 2.2rem); color: var(--indigo-deep); }
.section__head p{ color: var(--ink-soft); margin-top:8px; max-width: 52ch; }

/* field chips */
.chip-row{ display:flex; flex-wrap:wrap; gap:10px; }
.chip{
  font-size:0.86rem; padding: 9px 16px; border-radius: 20px; border:1px solid var(--line-strong);
  color: var(--ink-soft); background: var(--surface); font-weight:500;
  transition: all .15s ease;
}
.chip:hover, .chip.is-active{ border-color: var(--indigo-deep); color: var(--indigo-deep); background: var(--indigo-soft); }

/* =========================================================
   PAPER CARDS
   ========================================================= */
.paper-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.paper-card{
  background: var(--surface); border:1px solid var(--line); border-radius: 4px;
  padding: 24px; display:flex; flex-direction:column; gap:12px;
  transition: box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}
.paper-card:hover{ box-shadow: var(--shadow-card-hover); transform: translateY(-2px); border-color: var(--line-strong); }
.paper-card__top{ display:flex; justify-content:space-between; align-items:flex-start; gap:10px; }
.paper-card__field{ font-size:0.72rem; color: var(--teal); font-weight:600; text-transform:uppercase; letter-spacing:0.05em; }
.paper-card h3{ font-size: 1.08rem; line-height:1.35; }
.paper-card .authors{ font-size:0.86rem; color: var(--ink-soft); }
.paper-card .excerpt{ font-size:0.88rem; color: var(--ink-soft); line-height:1.5; }
.paper-card__foot{
  margin-top: auto; display:flex; align-items:center; justify-content:space-between;
  padding-top: 14px; border-top: 1px dashed var(--line);
  font-size:0.78rem; color: var(--ink-faint);
}
.icon-row{ display:flex; gap:14px; align-items:center; }
.icon-row span{ display:flex; align-items:center; gap:5px; }

/* =========================================================
   STEPS (real sequence: register -> submit -> publish)
   ========================================================= */
.steps{ display:grid; grid-template-columns: repeat(3,1fr); gap: 30px; counter-reset: step; }
.step{ position:relative; padding-left: 4px; }
.step__num{
  font-family: var(--font-mono); font-size:0.85rem; color: var(--amber); font-weight:600;
  display:block; margin-bottom:14px;
}
.step h3{ font-size:1.15rem; margin-bottom:10px; color: var(--indigo-deep); }
.step p{ color: var(--ink-soft); font-size:0.92rem; }

/* =========================================================
   FOOTER
   ========================================================= */
.footer{ border-top: 1px solid var(--line); padding: 56px 0 34px; background: var(--indigo-deep); color: #E9EBF2; }
.footer a{ color: #C7CCDF; }
.footer a:hover{ color:#fff; }
.footer__grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; margin-bottom: 40px; }
.footer h4{ font-size:0.8rem; text-transform:uppercase; letter-spacing:0.06em; color:#8E97BA; margin-bottom:16px; font-family: var(--font-body); font-weight:600; }
.footer li{ margin-bottom:10px; font-size:0.92rem; }
.footer .brand{ color:#fff; }
.footer__bottom{
  display:flex; justify-content:space-between; padding-top:26px; border-top:1px solid rgba(255,255,255,0.12);
  font-size:0.8rem; color:#8E97BA; flex-wrap:wrap; gap:10px;
}

/* =========================================================
   FORMS (register / login / submit)
   ========================================================= */
.auth-wrap{
  min-height: calc(100vh - 72px);
  display:grid; grid-template-columns: 1fr 1fr;
}
.auth-side{
  background: var(--indigo-deep); color:#fff; padding: 60px; display:flex; flex-direction:column; justify-content:space-between;
  position:relative; overflow:hidden;
}
.auth-side h2{ font-size: clamp(1.8rem,3vw,2.4rem); max-width:14ch; }
.auth-side p{ color:#C7CCDF; margin-top:16px; max-width:34ch; }
.auth-quote{ font-family: var(--font-display); font-style:italic; font-size:1.05rem; color:#fff; }
.auth-quote span{ display:block; margin-top:10px; font-family: var(--font-mono); font-style:normal; font-size:0.78rem; color:#8E97BA; }
.auth-form{ padding: 60px; display:flex; align-items:center; justify-content:center; }
.form-card{ width:100%; max-width: 400px; }
.form-card h1{ font-size:1.9rem; color: var(--indigo-deep); }
.form-card > p{ color: var(--ink-soft); margin-top:8px; margin-bottom: 32px; font-size:0.94rem; }

.field{ margin-bottom: 20px; }
.field label{ display:block; font-size:0.84rem; font-weight:600; margin-bottom:7px; color: var(--ink); }
.field .hint{ font-size:0.78rem; color: var(--ink-faint); margin-top:6px; display:block; }
.input, textarea.input, select.input{
  width:100%; padding: 12px 14px; border:1px solid var(--line-strong); border-radius: var(--radius);
  background: var(--surface); font-size:0.94rem; color: var(--ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input:focus, textarea.input:focus, select.input:focus{
  outline:none; border-color: var(--indigo-deep); box-shadow: 0 0 0 3px var(--indigo-soft);
}
textarea.input{ resize: vertical; min-height: 110px; }
.check-row{ display:flex; align-items:flex-start; gap:10px; font-size:0.85rem; color: var(--ink-soft); }
.check-row input{ margin-top:3px; }
.form-foot{ margin-top:26px; font-size:0.88rem; color: var(--ink-soft); text-align:center; }
.divider-row{ display:flex; align-items:center; gap:12px; margin: 24px 0; color: var(--ink-faint); font-size:0.8rem; }
.divider-row::before, .divider-row::after{ content:""; flex:1; height:1px; background: var(--line); }

/* =========================================================
   DASHBOARD
   ========================================================= */
.dash{ display:grid; grid-template-columns: 250px 1fr; min-height: calc(100vh - 72px); }
.dash__side{ background: var(--surface); border-right:1px solid var(--line); padding: 32px 22px; }
.dash__profile{ display:flex; align-items:center; gap:12px; padding-bottom:24px; margin-bottom:20px; border-bottom:1px solid var(--line); }
.avatar{ width:42px; height:42px; border-radius:50%; background: var(--indigo-soft); color: var(--indigo-deep); display:flex; align-items:center; justify-content:center; font-weight:700; font-family: var(--font-display); }
.dash__profile b{ display:block; font-size:0.92rem; }
.dash__profile span{ font-size:0.78rem; color: var(--ink-soft); }
.dash__nav a{
  display:flex; align-items:center; gap:10px; padding: 11px 12px; border-radius: var(--radius);
  font-size:0.9rem; color: var(--ink-soft); font-weight:500; margin-bottom:2px;
}
.dash__nav a:hover{ background: var(--bg-alt); color: var(--ink); }
.dash__nav a.active{ background: var(--indigo-soft); color: var(--indigo-deep); }
.dash__main{ padding: 40px 44px; }
.dash__head{ display:flex; justify-content:space-between; align-items:flex-start; margin-bottom: 30px; flex-wrap:wrap; gap:16px; }
.dash__head h1{ font-size:1.7rem; color: var(--indigo-deep); }
.dash__head p{ color: var(--ink-soft); margin-top:6px; }

.kpi-row{ display:grid; grid-template-columns: repeat(3,1fr); gap:18px; margin-bottom: 36px; }
.kpi{ background: var(--surface); border:1px solid var(--line); border-radius:4px; padding:20px; }
.kpi span{ font-size:0.8rem; color: var(--ink-soft); }
.kpi b{ display:block; font-family: var(--font-display); font-size:1.8rem; color: var(--indigo-deep); margin-top:6px; }

.table{ width:100%; border-collapse: collapse; background: var(--surface); border:1px solid var(--line); border-radius:4px; overflow:hidden; }
.table th, .table td{ text-align:left; padding: 14px 18px; font-size:0.88rem; border-bottom:1px solid var(--line); }
.table th{ background: var(--bg-alt); color: var(--ink-soft); font-weight:600; font-size:0.78rem; text-transform:uppercase; letter-spacing:0.04em; }
.table tr:last-child td{ border-bottom:none; }
.badge{ font-size:0.74rem; font-weight:600; padding:4px 10px; border-radius:20px; display:inline-block; }
.badge-published{ background: var(--teal-soft); color: var(--teal); }
.badge-draft{ background: var(--amber-soft); color: var(--amber-deep); }

/* =========================================================
   BROWSE PAGE
   ========================================================= */
.browse{ display:grid; grid-template-columns: 260px 1fr; gap: 40px; padding: 44px 0 80px; align-items:start; }
.filter-block{ margin-bottom: 28px; }
.filter-block h4{ font-size:0.78rem; text-transform:uppercase; letter-spacing:0.05em; color: var(--ink-faint); margin-bottom:14px; }
.filter-block label{ display:flex; align-items:center; gap:9px; font-size:0.9rem; color: var(--ink-soft); margin-bottom:10px; }
.search-row{
  display:flex; gap:12px; margin-bottom: 26px;
}
.search-row .input{ flex:1; }
.result-count{ color: var(--ink-soft); font-size:0.9rem; margin-bottom:22px; }
.paper-grid.list{ grid-template-columns: 1fr; }
.paper-grid.list .paper-card{ flex-direction:row; align-items:flex-start; gap:26px; }
.paper-grid.list .paper-card__body{ flex:1; }

/* =========================================================
   PAPER DETAIL
   ========================================================= */
.paper-head{ padding: 50px 0 40px; border-bottom:1px solid var(--line); }
.paper-head__meta{ display:flex; gap:14px; align-items:center; margin-bottom:20px; flex-wrap:wrap; }
.paper-head h1{ font-size: clamp(1.7rem,3.4vw,2.5rem); color: var(--indigo-deep); max-width: 26ch; }
.paper-head .authors-line{ margin-top:16px; font-size:1rem; color: var(--ink-soft); }
.paper-head .authors-line a{ color: var(--indigo-deep); font-weight:600; }
.paper-head__actions{ display:flex; gap:12px; margin-top:26px; flex-wrap:wrap; }

.paper-body{ display:grid; grid-template-columns: 2fr 1fr; gap: 50px; padding: 50px 0; }
.paper-body h2{ font-size:1.2rem; color: var(--indigo-deep); margin-bottom:14px; }
.paper-body .abstract{ color: var(--ink-soft); font-size:1rem; line-height:1.75; margin-bottom:34px; }
.keyword-row{ display:flex; gap:8px; flex-wrap:wrap; margin-bottom:34px; }
.keyword{ font-size:0.8rem; background: var(--bg-alt); padding:6px 12px; border-radius:20px; color: var(--ink-soft); }

.meta-card{ background: var(--surface); border:1px solid var(--line); border-radius:4px; padding:24px; margin-bottom:22px; }
.meta-card dl{ display:grid; grid-template-columns: auto 1fr; gap: 10px 14px; font-size:0.86rem; }
.meta-card dt{ color: var(--ink-faint); }
.meta-card dd{ margin:0; color: var(--ink); font-family: var(--font-mono); font-size:0.82rem; }

.tabs{ display:flex; gap:4px; background: var(--bg-alt); padding:4px; border-radius:4px; margin-bottom:14px; }
.tab{ flex:1; text-align:center; font-size:0.78rem; padding:8px; border-radius:3px; color: var(--ink-soft); font-weight:600; }
.tab.is-active{ background: var(--surface); color: var(--indigo-deep); box-shadow: var(--shadow-card); }
.cite-box{ background: var(--bg-alt); border-radius:4px; padding:14px; font-family: var(--font-mono); font-size:0.78rem; color: var(--ink-soft); line-height:1.6; }

/* =========================================================
   PROFILE / ABOUT
   ========================================================= */
.profile-head{ padding: 56px 0 40px; display:flex; gap:26px; align-items:center; border-bottom:1px solid var(--line); }
.avatar-lg{ width:88px; height:88px; border-radius:50%; background: var(--indigo-soft); color: var(--indigo-deep); display:flex; align-items:center; justify-content:center; font-family: var(--font-display); font-size:2rem; font-weight:700; flex-shrink:0; }
.profile-head h1{ font-size:1.9rem; color: var(--indigo-deep); }
.profile-head p{ color: var(--ink-soft); margin-top:6px; }
.profile-stats{ display:flex; gap:28px; margin-top:14px; }
.profile-stats div b{ font-family: var(--font-display); color: var(--indigo-deep); font-size:1.2rem; display:block; }
.profile-stats div span{ font-size:0.78rem; color: var(--ink-soft); }

.about-hero{ padding: 70px 0 40px; }
.about-hero .eyebrow{ justify-content:flex-start; }
.about-hero h1{ font-size: clamp(2rem,4vw,3rem); color: var(--indigo-deep); max-width: 16ch; }
.value-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap:26px; margin-top: 20px; }
.value-card{ background: var(--surface); border:1px solid var(--line); border-radius:4px; padding: 26px; }
.value-card .stamp{ margin-bottom:16px; }
.value-card h3{ font-size:1.05rem; margin-bottom:10px; color: var(--indigo-deep); }
.value-card p{ font-size:0.9rem; color: var(--ink-soft); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 980px){
  .hero__grid{ grid-template-columns: 1fr; }
  .hero__visual{ display:none; }
  .paper-grid{ grid-template-columns: repeat(2,1fr); }
  .steps{ grid-template-columns: 1fr; gap:36px; }
  .footer__grid{ grid-template-columns: 1fr 1fr; }
  .auth-wrap{ grid-template-columns: 1fr; }
  .auth-side{ display:none; }
  .dash{ grid-template-columns: 1fr; }
  .dash__side{ border-right:none; border-bottom:1px solid var(--line); }
  .browse{ grid-template-columns: 1fr; }
  .paper-body{ grid-template-columns: 1fr; }
  .value-grid{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px){
  .nav__links{
    position:absolute; top:72px; left:0; right:0; background: var(--bg);
    flex-direction:column; align-items:flex-start; padding: 20px 28px; gap:18px;
    border-bottom:1px solid var(--line); display:none;
  }
  .nav__links.is-open{ display:flex; }
  .nav__toggle{ display:flex; }
  .nav__actions .btn-ghost{ display:none; }
  .stats-bar .container{ grid-template-columns: 1fr 1fr; row-gap:22px; }
  .paper-grid{ grid-template-columns: 1fr; }
  .paper-grid.list .paper-card{ flex-direction:column; }
  .kpi-row{ grid-template-columns: 1fr; }
  .footer__grid{ grid-template-columns: 1fr; gap:26px; }
  .footer__bottom{ flex-direction:column; }
  .auth-form{ padding: 40px 24px; }
  .dash__main{ padding: 30px 20px; }
  .value-grid{ grid-template-columns: 1fr; }
  .profile-head{ flex-direction:column; text-align:center; }
  .profile-stats{ justify-content:center; }
  .section{ padding: 52px 0; }
  .hero{ padding: 50px 0 40px; }
}