/* sim-ai.net */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: #FFFFFF; color: #333333; font-family: 'Inter', sans-serif; font-weight: 400; line-height: 1.65; }
.section-heading { font-family: 'Inter', sans-serif; font-weight: 700; font-size: 1.5rem; color: #1E3A5F; text-align: center; margin-bottom: 2rem; }
.hero-gradient { background: linear-gradient(135deg, #1E3A5F 0%, #3B1F6E 100%); padding: 5rem 2rem 4rem; text-align: center; color: #FFFFFF; }
.headline { font-family: 'Inter', sans-serif; font-weight: 700; font-size: clamp(2rem, 5vw, 2.8rem); margin-bottom: 0.5rem; }
.hero-sub { font-size: 1rem; opacity: 0.85; margin-bottom: 2rem; }
.join-btn { display: inline-block; background: #FFFFFF; color: #1E3A5F; font-weight: 600; font-size: 0.95rem; padding: 0.75rem 2rem; border-radius: 8px; text-decoration: none; }
.features { max-width: 900px; margin: 0 auto; padding: 3rem 2rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.feature-card { background: #FFFFFF; border: 1px solid #E5E7EB; border-top: 3px solid; border-image: linear-gradient(90deg, #2563EB, #7C3AED) 1; padding: 1.5rem; border-radius: 0 0 8px 8px; }
.feature-name { font-family: 'Inter', sans-serif; font-weight: 700; font-size: 1.1rem; color: #1E3A5F; margin-bottom: 0.25rem; }
.feature-count { font-family: 'Fira Code', monospace; font-size: 0.75rem; color: #4F6BED; margin-bottom: 0.75rem; }
.feature-desc { font-size: 0.9rem; color: #6B7280; margin-bottom: 1rem; }
.browse-link { font-size: 0.85rem; color: #4F6BED; text-decoration: none; }
.discussions { max-width: 800px; margin: 0 auto; padding: 3rem 2rem; }
.thread-table { display: flex; flex-direction: column; }
.thread-row { display: flex; align-items: center; gap: 1rem; padding: 0.75rem 1rem; border-bottom: 1px solid #E5E7EB; flex-wrap: wrap; }
.thread-row.even { background: #F8F9FB; }
.thread-topic { flex: 1; min-width: 200px; font-weight: 500; color: #333333; font-size: 0.9rem; }
.cat-tag { font-family: 'Fira Code', monospace; font-size: 0.7rem; color: #6B7280; background: #F8F9FB; border: 1px solid #E5E7EB; border-radius: 4px; padding: 2px 8px; }
.reply-count { font-family: 'Fira Code', monospace; font-size: 0.75rem; color: #6B7280; }
.thread-time { font-family: 'Fira Code', monospace; font-size: 0.7rem; color: #6B7280; }
.spotlight { max-width: 800px; margin: 0 auto; padding: 3rem 2rem; }
.spotlight-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.member-card { border: 1px solid #E5E7EB; border-radius: 12px; padding: 2rem; text-align: center; }
.avatar-circle { width: 64px; height: 64px; border-radius: 50%; border: 3px solid #E5E7EB; display: flex; align-items: center; justify-content: center; font-family: 'Inter', sans-serif; font-weight: 700; font-size: 1.2rem; color: #3B1F6E; margin: 0 auto 1rem; background: #F8F9FB; }
.member-name { font-weight: 700; font-size: 1.1rem; color: #1E3A5F; margin-bottom: 0.25rem; }
.member-expertise { font-size: 0.8rem; color: #4F6BED; margin-bottom: 1rem; }
.member-bio { font-size: 0.9rem; color: #6B7280; }
.signup-card { border: 1px solid #E5E7EB; border-radius: 12px; padding: 2rem; }
.signup-title { font-weight: 700; font-size: 1.1rem; color: #1E3A5F; margin-bottom: 0.5rem; }
.signup-desc { font-size: 0.85rem; color: #6B7280; margin-bottom: 1.5rem; }
.form-field { margin-bottom: 1rem; }
.field-label { display: block; font-size: 0.8rem; color: #6B7280; margin-bottom: 0.25rem; }
.field-input { height: 36px; background: #F8F9FB; border: 1px solid #E5E7EB; border-radius: 6px; }
.submit-btn { display: inline-block; background: linear-gradient(90deg, #2563EB, #7C3AED); color: #FFFFFF; font-weight: 600; font-size: 0.9rem; padding: 0.6rem 1.5rem; border-radius: 6px; text-decoration: none; }
.footer { border-top: 3px solid; border-image: linear-gradient(90deg, #2563EB, #7C3AED) 1; padding: 3rem 2rem; max-width: 800px; margin: 0 auto; text-align: center; }
.footer-accent { display: none; }
.footer-cols { display: flex; justify-content: center; gap: 4rem; margin-bottom: 2rem; flex-wrap: wrap; }
.footer-col { text-align: left; }
.fc-title { font-weight: 700; font-size: 0.85rem; color: #1E3A5F; margin-bottom: 0.5rem; }
.fc-link { display: block; font-size: 0.8rem; color: #6B7280; text-decoration: none; margin-bottom: 0.25rem; }
.footer-tagline { font-weight: 600; font-size: 1rem; color: #1E3A5F; margin-bottom: 0.5rem; }
.footer-copy { font-size: 0.7rem; color: #6B7280; }
@media (max-width: 640px) { .feature-grid { grid-template-columns: 1fr; } .spotlight-layout { grid-template-columns: 1fr; } }
.fade-in { opacity: 0; transform: translateY(12px); transition: opacity 0.5s ease, transform 0.5s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }