:root {
  --bg-base:       #f0f2f7;
  --bg-surface:    #ffffff;
  --bg-elevated:   #e8ecf4;
  --bg-input:      #ffffff;
  --border:        #e2e8f0;
  --text-primary:  #1a202c;
  --text-secondary:#4a5568;
  --text-muted:    #718096;
  --accent:        #7c3aed;
  --accent-hover:  #6d28d9;
  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 14px; --radius-xl: 20px;
  --shadow: 0 2px 8px rgba(0,0,0,.08);
  --color-success:#10b981; --color-success-bg:rgba(16,185,129,.1);
  --color-danger: #ef4444; --color-danger-bg: rgba(239,68,68,.1);
  --color-warning:#f59e0b; --color-warning-bg:rgba(245,158,11,.1);
  --color-info:   #0ea5e9; --color-info-bg:   rgba(14,165,233,.1);
  --color-info-border: rgba(14,165,233,.3);
  --color-gold:   #d97706;
  --tier-bronze:  #cd7f32;
  --tier-silver:  #9ca3af;
  --tier-gold:    #d97706;
  --tier-platinum:#7c3aed;
}
[data-theme="dark"] {
  --bg-base:       #0f1117;
  --bg-surface:    #22263a;
  --bg-elevated:   #2a2f45;
  --bg-input:      #181c2a;
  --border:        #3a4460;
  --text-primary:  #e2e8f0;
  --text-secondary:#a0aec0;
  --text-muted:    #718096;
  --accent:        #8b5cf6;
  --accent-hover:  #7c3aed;
  --shadow: 0 2px 16px rgba(0,0,0,.4);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg-base);color:var(--text-primary);min-height:100vh;line-height:1.5;transition:background .2s,color .2s}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
input,select,textarea{background:var(--bg-input);border:1px solid var(--border);color:var(--text-primary);border-radius:var(--radius-md);padding:10px 14px;font-size:14px;width:100%;transition:border .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,58,237,.15)}
label{display:block;font-size:12px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:5px}
.form-group{margin-bottom:16px}
.card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow)}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:var(--radius-md);font-size:14px;font-weight:700;border:none;cursor:pointer;transition:all .15s;text-decoration:none}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);text-decoration:none}
.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border)}
.btn-danger{background:var(--color-danger);color:#fff}.btn-danger:hover{opacity:.9}
.btn-success{background:var(--color-success);color:#fff}.btn-success:hover{opacity:.9}
.btn-sm{padding:6px 14px;font-size:12px}
.btn-lg{padding:14px 28px;font-size:16px;border-radius:var(--radius-lg)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.alert{padding:12px 16px;border-radius:var(--radius-md);font-size:14px;margin-bottom:16px;font-weight:600}
.alert-success{background:var(--color-success-bg);color:var(--color-success);border:1px solid var(--color-success)}
.alert-danger{background:var(--color-danger-bg);color:var(--color-danger);border:1px solid var(--color-danger)}
.alert-warning{background:var(--color-warning-bg);color:var(--color-warning);border:1px solid var(--color-warning)}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:800;letter-spacing:.05em;text-transform:uppercase}
.badge-bronze{background:rgba(205,127,50,.2);color:var(--tier-bronze)}
.badge-silver{background:rgba(156,163,175,.2);color:var(--tier-silver)}
.badge-gold{background:rgba(217,119,6,.2);color:var(--tier-gold)}
.badge-platinum{background:rgba(124,58,237,.2);color:var(--tier-platinum)}
table{width:100%;border-collapse:collapse;font-size:14px}
th{text-align:left;padding:10px 14px;font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);border-bottom:2px solid var(--border)}
td{padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:middle}
tr:hover td{background:var(--bg-elevated)}
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:10px}
.page-title{font-size:24px;font-weight:900}
.page-sub{color:var(--text-muted);font-size:14px;margin-top:2px}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;text-align:center}
.stat-value{font-size:28px;font-weight:900}
.stat-label{font-size:12px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.05em;margin-top:4px}
.points-display{font-size:48px;font-weight:900;color:var(--accent)}
.tier-ring{display:inline-flex;align-items:center;justify-content:center;width:80px;height:80px;border-radius:50%;border:4px solid;font-size:28px;font-weight:900}