:root { --osu-orange:#FF7300; --osu-dark:#2c2c2c; --black:#000; --bg:#FAFAFA; --card:#fff; --muted:#555; --border:#e0e0e0; --footer-bg:#1a1a1a; }
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--black);line-height:1.6}

/* Utility Bar */
.utility-bar{background:var(--osu-dark);color:#fff;padding:8px 0;font-size:.85rem}
.quicklinks{display:flex;gap:16px;justify-content:flex-end}
.quicklinks a{color:#fff;text-decoration:none;transition:color .2s}
.quicklinks a:hover{color:var(--osu-orange)}
@media (max-width:768px){.quicklinks{justify-content:center;flex-wrap:wrap}}

/* Header */
header{background:#fff;color:var(--black);padding:16px 0;border-bottom:4px solid var(--osu-orange);box-shadow:0 2px 4px rgba(0,0,0,.05)}
.header-content{display:flex;align-items:center;justify-content:space-between;gap:24px}
header .brand .logo{height:52px;width:auto;display:block}
.main-nav{display:flex;gap:24px;align-items:center}
.main-nav a{color:var(--black);text-decoration:none;font-weight:500;font-size:.95rem;transition:color .2s}
.main-nav a:hover{color:var(--osu-orange)}
@media (max-width:900px){.header-content{flex-direction:column;align-items:flex-start}.main-nav{flex-wrap:wrap;gap:12px}}

/* Container */
.container{max-width:1200px;margin:20px auto;padding:0 20px}

/* Hero */
.hero{margin:16px 0 24px;background:#fff;padding:32px;border-radius:12px;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.hero-content{display:flex;align-items:flex-start;gap:32px}
.hero-logo{flex-shrink:0}
.hero-logo img{width:220px;height:auto;display:block}
.hero-text{flex:1}
.hero h1{margin:0 0 12px;font-size:2rem;font-weight:700;line-height:1.3;color:var(--osu-dark)}
.hero p{margin:8px 0;color:#333;font-size:1rem;line-height:1.7}
.hero p strong{color:var(--osu-orange)}
@media (max-width:768px){.hero-content{flex-direction:column;align-items:center;text-align:center}.hero-logo img{width:180px}.hero h1{font-size:1.6rem}}

/* Controls */
.controls{display:grid;grid-template-columns:1fr auto auto;gap:12px;margin-bottom:20px}
@media (max-width:800px){.controls{grid-template-columns:1fr}}
input[type="search"]{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:8px;background:#fff;font-size:.95rem;transition:border-color .2s}
input[type="search"]:focus{outline:none;border-color:var(--osu-orange)}
select,.chipset{padding:12px 16px;border:1px solid var(--border);border-radius:8px;background:white;font-size:.95rem}

/* Chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border:1px solid var(--border);border-radius:999px;background:#fff;font-size:.9rem}

/* Result Counter */
#result-counter{text-align:center;color:var(--muted);font-size:.9rem;margin:12px 0;font-weight:500}

/* Grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:1000px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid{grid-template-columns:1fr}}

/* Cards */
.card{background:var(--card);padding:20px;border-radius:12px;border:1px solid var(--border);box-shadow:0 2px 6px rgba(0,0,0,.06);transition:all .2s}
.card:hover{box-shadow:0 4px 12px rgba(0,0,0,.1);transform:translateY(-2px)}
.card h3{margin:0 0 10px;font-size:1.1rem;font-weight:600;line-height:1.4}

/* Cluster Cards */
.cluster-card{background:var(--card);padding:28px;border-radius:12px;border:2px solid var(--border);box-shadow:0 2px 8px rgba(0,0,0,.06);transition:all 0.25s;text-decoration:none;display:block;color:inherit}
.cluster-card:hover{border-color:var(--osu-orange);box-shadow:0 6px 20px rgba(255,115,0,.2);transform:translateY(-3px)}
.cluster-card h2{margin:0 0 8px;font-size:1.5rem;color:var(--osu-orange);font-weight:700}
.cluster-card .count{font-size:1.05rem;color:var(--muted);margin:0;font-weight:500}
.cluster-card .desc{font-size:.95rem;color:#666;margin:10px 0 0;line-height:1.6}
.cluster-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:24px}
@media (max-width:768px){.cluster-grid{grid-template-columns:1fr}}

/* Meta & Badge */
.meta{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:.9rem;margin-bottom:10px}
.badge{display:inline-block;padding:5px 12px;background:#fff2e6;color:#9b4700;border:1px solid #ffd7b0;border-radius:999px;font-weight:600;font-size:.8rem}

/* Key-Value Display */
.kv{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}
.kv div{padding:12px;border:1px solid var(--border);border-radius:8px;background:#fafafa}
.kv strong{display:block;color:var(--muted);font-size:.85rem;margin-bottom:4px}

/* Actions */
.actions{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}
.button{text-decoration:none;display:inline-block;padding:12px 20px;border-radius:6px;background:var(--osu-orange);color:#fff;font-weight:700;border:none;transition:background .2s;font-size:.95rem}
.button:hover{background:#e66900}
.link{text-decoration:none;color:var(--osu-orange);font-weight:600;transition:color .2s;font-size:.95rem}
.link:hover{color:#e66900}

/* Footer */
footer{background:var(--footer-bg);color:#ccc;padding:40px 0 20px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-bottom:32px}
.footer-section h4{color:#fff;margin:0 0 16px;font-size:1.1rem;font-weight:600}
.footer-section ul{list-style:none;padding:0;margin:0}
.footer-section li{margin-bottom:8px}
.footer-section a{color:#ccc;text-decoration:none;transition:color .2s;font-size:.9rem}
.footer-section a:hover{color:var(--osu-orange)}
.footer-section p{margin:6px 0;font-size:.9rem;line-height:1.6}
.social-links{display:flex;flex-direction:column;gap:8px}
.footer-bottom{border-top:1px solid #333;padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-bottom p{margin:0;font-size:.85rem}
.footer-links{display:flex;gap:16px}
.footer-links a{color:#ccc;text-decoration:none;font-size:.85rem}
.footer-links a:hover{color:var(--osu-orange)}
@media (max-width:768px){.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;text-align:center}}

/* Misc */
.footer-note{margin-top:24px;color:var(--muted);font-size:.9rem;line-height:1.6}
.placeholder{padding:16px;border:2px dashed #ccc;border-radius:8px;background:#fff;margin-top:12px;color:var(--muted)}
table{border-collapse:collapse;width:100%}
tr,td,th{border-bottom:1px solid var(--border);padding:10px;text-align:left}