/* === Base Reset & Typography === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  font-size: 1.05rem; line-height: 1.7; color: #0D2818; background: #F0F7F4;
}
h1, h2, h3, h4 { font-family: 'Playfair Display', Georgia, serif; font-weight: 700; line-height: 1.3; }
h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; margin-bottom: 1.5rem; color: #1565C0; position: relative; padding-bottom: 0.5rem; }
h2::after { content: ''; position: absolute; bottom: 0; left: 0; width: 60px; height: 3px; background: #2E7D32; border-radius: 2px; }
h3 { font-size: 1.35rem; margin: 2rem 0 1rem; color: #0D2818; }
h4 { font-size: 1.1rem; font-family: 'Inter', sans-serif; font-weight: 600; }
p { margin-bottom: 1rem; }
a { color: #1565C0; text-decoration: none; }
a:hover { text-decoration: underline; }
strong { color: #1565C0; }
img { max-width: 100%; height: auto; display: block; }

/* === Layout === */
.container { max-width: 900px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 4rem 0; }
.section-alt { background: #E8F0EC; }

/* === Hero === */
.hero { position: relative; min-height: 520px; display: flex; align-items: center; justify-content: center; overflow: hidden; color: #fff; text-align: center; }
.hero-bg { position: absolute; inset: 0; z-index: 1; background: url('./assets/hero_bg.png') center/cover no-repeat; }
.hero-overlay { position: absolute; inset: 0; z-index: 2; background: linear-gradient(135deg, rgba(13,40,24,0.88), rgba(21,101,192,0.75)); }
.hero-content { position: relative; z-index: 3; max-width: 800px; padding: 3rem 1.5rem; }
.hero-badge { display: inline-block; padding: 0.3rem 1rem; border-radius: 20px; background: rgba(255,255,255,0.15); color: #fff; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 1.5rem; backdrop-filter: blur(4px); }
.hero h1 { color: #fff; margin-bottom: 1rem; font-size: 2.4rem; }
.hero-journal { opacity: 0.85; font-size: 0.95rem; margin-bottom: 0.5rem; }
.hero-authors { opacity: 0.75; font-size: 0.9rem; margin-bottom: 1.5rem; }
.hero-keywords { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; margin-bottom: 1.5rem; }
.chip { display: inline-block; padding: 0.25rem 0.75rem; border-radius: 20px; background: rgba(46,125,50,0.3); color: #fff; font-size: 0.78rem; font-weight: 500; backdrop-filter: blur(4px); border: 1px solid rgba(255,255,255,0.2); }
.hero-actions { margin-top: 1rem; }
.btn { display: inline-block; padding: 0.7rem 1.8rem; border-radius: 8px; background: #2E7D32; color: #fff; font-weight: 600; font-size: 0.95rem; text-decoration: none; transition: background 0.3s, transform 0.2s; }
.btn:hover { background: #1B5E20; transform: translateY(-1px); text-decoration: none; }

/* === Abstract Card === */
.abstract-card { background: #fff; border-left: 4px solid #1565C0; border-radius: 0 12px 12px 0; padding: 2rem 2.5rem; box-shadow: 0 2px 16px rgba(21,101,192,0.06); font-size: 1.05rem; }

/* === Cards === */
.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin: 1.5rem 0; }
.info-card { background: #fff; border-radius: 12px; padding: 1.5rem; box-shadow: 0 2px 12px rgba(21,101,192,0.05); border-top: 3px solid #2E7D32; transition: transform 0.2s, box-shadow 0.2s; }
.info-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(21,101,192,0.1); }
.card-icon { display: inline-block; padding: 0.3rem 0.8rem; border-radius: 6px; background: #E8F0EC; color: #1565C0; font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.75rem; }
.info-card h4 { margin-bottom: 0.5rem; }
.info-card p { font-size: 0.92rem; margin-bottom: 0; color: #1A3D28; }

/* === Barriers List === */
.barriers-list { margin: 1.5rem 0; }
.barrier-item { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1.5rem; background: #fff; border-radius: 12px; padding: 1.25rem 1.5rem; box-shadow: 0 1px 8px rgba(21,101,192,0.04); }
.barrier-num { flex-shrink: 0; width: 36px; height: 36px; border-radius: 50%; background: #1565C0; color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.9rem; }
.barrier-item h4 { margin-bottom: 0.3rem; }
.barrier-item p { font-size: 0.92rem; margin-bottom: 0; }

/* === Tables === */
.table-wrapper { overflow-x: auto; margin: 1.5rem 0; border-radius: 12px; box-shadow: 0 2px 12px rgba(21,101,192,0.05); }
table { width: 100%; border-collapse: collapse; background: #fff; font-size: 0.9rem; }
thead { background: #1565C0; color: #fff; }
th { padding: 0.75rem 1rem; text-align: left; font-weight: 600; font-size: 0.85rem; }
td { padding: 0.65rem 1rem; border-bottom: 1px solid #CDE0D0; }
tbody tr:nth-child(even) { background: #F5FAF7; }
tbody tr:hover { background: #E8F0EC; }

/* === Figures === */
.figure-container { margin: 2rem 0; background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 2px 16px rgba(21,101,192,0.06); border: 1px solid #CDE0D0; }
.figure-container img { width: 100%; display: block; }
.figure-container figcaption { padding: 1rem 1.5rem; font-size: 0.88rem; color: #4A6B50; border-top: 1px solid #CDE0D0; line-height: 1.5; }

/* === Future List === */
.future-list { list-style: none; margin: 1rem 0; }
.future-list li { padding: 0.75rem 1rem 0.75rem 1.5rem; margin-bottom: 0.5rem; background: #fff; border-radius: 8px; font-size: 0.95rem; box-shadow: 0 1px 4px rgba(21,101,192,0.03); position: relative; }
.future-list li::before { content: '\25B8'; position: absolute; left: 0.5rem; color: #2E7D32; font-weight: 700; }

/* === References === */
details { margin: 1rem 0; }
details summary { cursor: pointer; font-family: 'Playfair Display', Georgia, serif; font-size: 1.2rem; font-weight: 700; color: #1565C0; padding: 0.5rem 0; }
details summary:hover { color: #0D47A1; }
.ref-list { padding-left: 2rem; margin-top: 1rem; }
.ref-list li { font-size: 0.82rem; color: #4A6B50; margin-bottom: 0.4rem; line-height: 1.5; }

/* === Flecto Explanation UI === */
.flecto-note, .flecto-callout, .flecto-card, .flecto-panel { margin: 1.5rem 0; border-radius: 10px; padding: 1.25rem 1.5rem; }
.flecto-note::before, .flecto-callout::before, .flecto-card::before, .flecto-panel::before { content: '\1F916 AI explanation'; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; color: #60a5fa; letter-spacing: 0.06em; display: block; margin-bottom: 0.5em; }
.flecto-note { background: #F5FAF7; border-left: 3px solid #2E7D32; font-size: 0.92rem; }
.flecto-callout { background: #E8F4FD; border: 1px solid #90CAF9; }
.flecto-card { background: #fff; border: 1px solid #CDE0D0; box-shadow: 0 2px 8px rgba(21,101,192,0.05); }
.flecto-panel { background: #F0F7F4; border: 1px solid #CDE0D0; box-shadow: 0 2px 12px rgba(21,101,192,0.06); }
.flecto-note h4, .flecto-callout h4, .flecto-card h4, .flecto-panel h4 { font-size: 1rem; margin-bottom: 0.5rem; color: #1565C0; }
.flecto-note p, .flecto-callout p, .flecto-card p, .flecto-panel p { font-size: 0.92rem; margin-bottom: 0.5rem; }
.flecto-note ul, .flecto-callout ul, .flecto-card ul, .flecto-panel ul { margin: 0.5rem 0 0.5rem 1.5rem; font-size: 0.92rem; }

/* === Reveal Animation === */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* === Responsive === */
@media (max-width: 768px) {
  h1 { font-size: 1.8rem; } h2 { font-size: 1.4rem; }
  .hero { min-height: 400px; } .hero h1 { font-size: 1.7rem; }
  .card-grid { grid-template-columns: 1fr; }
  .abstract-card { padding: 1.5rem; } .section { padding: 2.5rem 0; }
}