:root {
    --bg: #0a0e17;
    --bg2: #111827;
    --bg3: #1f2937;
    --accent: #3b82f6;
    --accent2: #8b5cf6;
    --green: #10b981;
    --text: #e5e7eb;
    --text2: #9ca3af;
    --border: #374151;
    --radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Nav */
nav { background: var(--bg2); border-bottom: 1px solid var(--border); padding: 1rem 2rem; display: flex; align-items: center; gap: 2rem; position: sticky; top: 0; z-index: 100; }
nav .logo { font-size: 1.3rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; letter-spacing: -0.5px; }
nav .links { display: flex; gap: 1.5rem; }
nav .links a { color: var(--text2); font-size: 0.9rem; font-weight: 500; }
nav .links a:hover { color: var(--text); text-decoration: none; }

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 2rem; }
.hero { text-align: center; padding: 4rem 2rem; }
.hero h1 { font-size: 3rem; font-weight: 800; margin-bottom: 1rem; background: linear-gradient(135deg, var(--accent), var(--accent2), var(--green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero p { font-size: 1.2rem; color: var(--text2); max-width: 700px; margin: 0 auto 2rem; }
.hero .subtitle { font-size: 0.95rem; color: var(--text2); opacity: 0.7; }

/* Cards */
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1rem; transition: border-color 0.2s; }
.card:hover { border-color: var(--accent); }
.card h3 { margin-bottom: 0.5rem; }
.card .meta { color: var(--text2); font-size: 0.85rem; margin-bottom: 0.5rem; }

/* Grid */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; margin: 2rem 0; }

/* Badges */
.badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-filed { background: rgba(59,130,246,0.2); color: var(--accent); }
.badge-granted { background: rgba(16,185,129,0.2); color: var(--green); }
.badge-open { background: rgba(16,185,129,0.15); color: var(--green); }
.badge-attribution { background: rgba(139,92,246,0.2); color: var(--accent2); }

/* Forms */
input, textarea, select { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem 1rem; color: var(--text); font-size: 0.95rem; width: 100%; font-family: inherit; }
input:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { min-height: 120px; resize: vertical; }
label { display: block; font-weight: 600; margin-bottom: 0.4rem; font-size: 0.9rem; }
.form-group { margin-bottom: 1.25rem; }
.form-help { color: var(--text2); font-size: 0.8rem; margin-top: 0.25rem; }

/* Buttons */
.btn { display: inline-block; padding: 0.75rem 1.5rem; border-radius: 8px; font-weight: 600; font-size: 0.95rem; border: none; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #2563eb; text-decoration: none; }
.btn-lg { padding: 1rem 2rem; font-size: 1.1rem; }

/* Search */
.search-bar { display: flex; gap: 0.75rem; margin: 2rem 0; }
.search-bar input { flex: 1; font-size: 1rem; }

/* Section headers */
h2 { font-size: 1.8rem; margin-bottom: 1rem; }
.section { margin: 3rem 0; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }

/* Feature boxes */
.feature { text-align: center; padding: 2rem; }
.feature .icon { font-size: 2.5rem; margin-bottom: 1rem; }
.feature h3 { margin-bottom: 0.5rem; }
.feature p { color: var(--text2); font-size: 0.9rem; }

/* Stats */
.stats { display: flex; gap: 2rem; justify-content: center; margin: 2rem 0; }
.stat { text-align: center; }
.stat .num { font-size: 2.5rem; font-weight: 800; color: var(--accent); }
.stat .label { color: var(--text2); font-size: 0.85rem; }

/* Invention detail */
.inv-header { margin-bottom: 2rem; }
.inv-header h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.inv-section { margin: 2rem 0; }
.inv-section h2 { font-size: 1.3rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; margin-bottom: 1rem; }
.claim { background: var(--bg3); padding: 1rem; border-radius: 8px; margin-bottom: 0.5rem; border-left: 3px solid var(--accent); }
.claim-num { color: var(--accent); font-weight: 700; }

/* Governance */
.governance-content { line-height: 1.8; }
.governance-content h2 { margin-top: 2rem; }
.governance-content h3 { margin-top: 1.5rem; color: var(--accent); }
.governance-content ul { padding-left: 1.5rem; margin: 0.5rem 0; }

/* Toast */
.toast { position: fixed; bottom: 2rem; right: 2rem; background: var(--green); color: white; padding: 1rem 1.5rem; border-radius: 8px; font-weight: 600; display: none; z-index: 200; }
.toast.show { display: block; animation: fadeIn 0.3s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    nav { flex-direction: column; gap: 0.75rem; }
    .stats { flex-direction: column; gap: 1rem; }
}