:root{
  --blue:#2aa0e6; --dark:#1f2733; --grey:#6b7280; --bg:#f4f6f9;
  --card:#ffffff; --line:#e5e8ee; --accent:#0a66c2;
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',Arial,sans-serif;background:var(--bg);color:var(--dark)}
.hidden{display:none!important}
.brand{font-size:24px;font-weight:700}
.brand-blue{color:var(--blue)} .brand-dark{color:var(--dark)}

/* ---- login ---- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#e9f3fb,#f4f6f9)}
.login-card{background:var(--card);padding:36px;border-radius:14px;width:340px;
  box-shadow:0 10px 30px rgba(20,40,80,.12)}
.login-sub{color:var(--grey);margin:6px 0 22px}
.login-card label{display:block;font-size:13px;margin:12px 0 4px;color:var(--grey)}
.login-card input{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px}
.btn-primary{width:100%;margin-top:20px;background:var(--blue);color:#fff;border:0;
  padding:11px;border-radius:8px;font-size:15px;cursor:pointer}
.btn-primary:hover{background:#1f8fd4}
.hint{font-size:11px;color:var(--grey);margin-top:14px;text-align:center}
.error{color:#c0392b;font-size:13px;text-align:center}

/* ---- topbar ---- */
.topbar{display:flex;justify-content:space-between;align-items:center;
  background:#fff;padding:14px 28px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.topbar-right{display:flex;align-items:center;gap:14px;color:var(--grey)}
.btn-ghost{background:transparent;border:1px solid var(--line);border-radius:8px;
  padding:7px 14px;cursor:pointer;color:var(--dark)}

/* ---- layout ---- */
.container{max-width:1080px;margin:0 auto;padding:24px 20px 60px}
.section-title{text-align:center;color:var(--dark);margin:14px 0 22px}
.category-strip{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-bottom:8px}
.cat-tile{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 8px;
  text-align:center;cursor:pointer;transition:.15s}
.cat-tile:hover{box-shadow:0 6px 16px rgba(20,40,80,.1);transform:translateY(-2px)}
.cat-emoji{font-size:26px} .cat-name{font-size:12px;margin-top:8px;color:var(--accent);font-weight:600}

.reco-section,.catalog-section{margin-top:34px}
.reco-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.reco-head h3{margin:0}
.ai-badge{background:#eaf5ff;color:var(--accent);border:1px solid #cfe6fb;
  padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600}
.ai-disclosure{color:var(--grey);font-size:12px;margin:0 0 12px}
#category-filter{padding:8px 12px;border-radius:8px;border:1px solid var(--line)}

.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.reward-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;
  display:flex;flex-direction:column;gap:8px;transition:.15s}
.reward-card:hover{box-shadow:0 8px 20px rgba(20,40,80,.1)}
.reward-card.reco{border-left:4px solid var(--blue)}
.rc-cat{font-size:11px;color:var(--accent);text-transform:uppercase;letter-spacing:.4px}
.rc-name{font-weight:600;font-size:15px;line-height:1.3;min-height:40px}
.rc-points{color:var(--dark);font-weight:700}
.rc-reason{font-size:12px;color:var(--grey);font-style:italic}
.rc-btn{margin-top:6px;background:var(--blue);color:#fff;border:0;border-radius:8px;
  padding:8px;cursor:pointer}
.rc-btn:hover{background:#1f8fd4}
.footer{text-align:center;color:var(--grey);font-size:12px;padding:24px;border-top:1px solid var(--line)}
@media(max-width:760px){.category-strip{grid-template-columns:repeat(3,1fr)}.card-grid{grid-template-columns:1fr}}