:root{--primary:#4361ee;--secondary:#3f37c9;--accent:#4cc9f0;--light:#f8f9fa;--dark:#212529;--success:#4ade80;--warning:#facc15;--gradient:linear-gradient(135deg,#4361ee,#3a0ca3)}body{font-family:'Noto Sans SC','Roboto',sans-serif;background-color:#f8fafc;color:#334155;overflow-x:hidden}.admin-header{background:rgba(255,255,255,0.95);box-shadow:0 4px 20px rgba(0,0,0,0.05);padding:1rem 0;position:sticky;top:0;z-index:1000}.admin-brand{font-weight:700;font-size:1.8rem;color:var(--primary)}.admin-container{max-width:1400px;margin:0 auto;padding:20px}.admin-card{background:white;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,0.05);padding:25px;margin-bottom:25px;border:1px solid rgba(0,0,0,0.03);transition:all 0.3s ease}.admin-card:hover{box-shadow:0 15px 40px rgba(67,97,238,0.15);transform:translateY(-5px)}.admin-card-header{padding-bottom:15px;margin-bottom:20px;border-bottom:2px solid var(--primary);display:flex;justify-content:space-between;align-items:center}.admin-card-title{font-weight:700;font-size:1.5rem;color:var(--primary);margin:0}.form-label{font-weight:600;margin-bottom:8px}.btn-primary{background:var(--gradient);border:none;padding:10px 25px;font-weight:600;border-radius:50px;transition:all 0.3s ease}.btn-primary:hover{background:linear-gradient(135deg,#3a0ca3,#4361ee);transform:translateY(-3px);box-shadow:0 10px 20px rgba(67,97,238,0.3)}.btn-logout{background:#dc3545;color:white}.login-container{max-width:500px;margin:100px auto;padding:30px;background:white;border-radius:20px;box-shadow:0 20px 40px rgba(0,0,0,0.1)}.login-title{text-align:center;margin-bottom:30px;color:var(--primary);font-weight:700}.points-input{height:150px}.feature-preview{background:#f8f9fa;border-radius:10px;padding:15px;margin-top:15px}.feature-preview ul{padding-left:20px;margin-bottom:0}.feature-preview li{margin-bottom:8px}.nav-tabs .nav-link.active{background:var(--primary);color:white;border-color:var(--primary)}.nav-tabs .nav-link{color:var(--dark);font-weight:500}.alert-success{background:rgba(76,201,240,0.2);border-color:var(--accent);color:#0d6efd}.preview-image{max-width:200px;border-radius:10px;margin-top:10px;border:2px dashed #ddd;padding:5px}.upload-container{display:flex;align-items:center;gap:15px;margin-top:10px}.tab-indicator{display:inline-block;width:10px;height:10px;border-radius:50%;background-color:var(--primary);margin-right:8px}.admin-card-footer{padding-top:20px;margin-top:20px;border-top:1px solid #eee;text-align:right}.link-item{background:#f8f9fa;border-radius:10px;padding:15px;margin-bottom:15px}.link-label{font-weight:600;margin-bottom:5px;color:var(--primary)}.help-text{font-size:0.85rem;color:#6c757d;margin-top:5px}