/* =========================================
   aRMi // Multi-language Index Stylesheet
   ========================================= */

/* =========================================
   VARIABLES & GLOBAL STYLES
   ========================================= */
:root {
  --bg: #0b0c0f;
  --panel: #121420;
  --text: #e9ebf2;
  --muted: #a8afc3;
  --border: rgba(255,255,255,.10);
  --link: #8bd5ff;
  --accent: #7cf0c5;
  --warn: #ffdd7a;

  --maxw: 900px;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fb;
    --panel: #ffffff;
    --text: #161923;
    --muted: #4a5266;
    --border: rgba(20,30,55,.10);
    --link: #0b63ce;
    --accent: #0aa37f;
    --warn: #8a5b00;
    --shadow: 0 10px 25px rgba(20,30,55,.05);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  background: radial-gradient(1200px 600px at 50% -10%, rgba(124,240,197,.15), transparent 70%),
              radial-gradient(900px 500px at 10% 10%, rgba(139,213,255,.12), transparent 65%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--link); text-decoration: none; transition: color 0.2s; }
a:hover { text-decoration: underline; }

/* =========================================
   HEADER
   ========================================= */
header.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: calc(var(--maxw) + 2rem);
  margin: 0 auto;
  padding: .8rem 1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}

.brand {
  display: flex; align-items: center; gap: .6rem;
  font-weight: 600;
  font-size: 1.1rem;
}

.dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--link));
  box-shadow: 0 0 0 4px rgba(124,240,197,.15);
}

/* =========================================
   MAIN CONTENT
   ========================================= */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem 1rem 5rem;
}

.hero {
  margin-bottom: 3rem;
  text-align: center;
}

.hero h1 {
  margin: 0 0 .5rem;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* =========================================
   PAPERS GRID
   ========================================= */
.papers-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

.paper-card {
  display: flex;
  flex-direction: column;
  background: color-mix(in oklab, var(--panel) 95%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.paper-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in oklab, var(--link) 50%, var(--border));
  box-shadow: 0 15px 35px rgba(0,0,0,.3);
}

@media (prefers-color-scheme: light) {
  .paper-card:hover {
    box-shadow: 0 15px 35px rgba(20,30,55,.1);
  }
}

.paper-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  line-height: 1.3;
}

.paper-card h2 a {
  color: var(--text);
}
.paper-card h2 a:hover {
  color: var(--link);
  text-decoration: none;
}

.paper-authors {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  background: color-mix(in oklab, var(--text) 10%, transparent);
  color: var(--text);
}

.tag.year {
  background: color-mix(in oklab, var(--accent) 20%, transparent);
  color: color-mix(in oklab, var(--accent) 80%, var(--text));
}

.tag.highlight { 
  background: var(--link); 
  color: white; 
  border: none; 
  font-weight: 600;
} 

.paper-actions {
  margin-top: auto;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 99px;
  background: var(--panel);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
}

.btn:hover {
  background: color-mix(in oklab, var(--text) 10%, var(--panel));
  text-decoration: none;
}

.btn.primary {
  background: color-mix(in oklab, var(--link) 15%, var(--panel));
  border-color: color-mix(in oklab, var(--link) 50%, var(--border));
  color: var(--link);
}

.btn.primary:hover {
  background: color-mix(in oklab, var(--link) 25%, var(--panel));
}

/* =========================================
   STYLE FOR DRAFT PAPER
   ========================================= */
.paper-card.draft {
  border-style: dashed;
  background: color-mix(in oklab, var(--panel) 50%, transparent);
}
.paper-card.draft:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--muted);
}
.btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* =========================================
   FOOTER
   ========================================= */
footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}