:root {
  --bg:#0f0f13;--bg2:#16161e;--bg3:#1e1e2a;--border:#2a2a3a;
  --text:#e8e8f0;--text2:#8888aa;--primary:#3390ec;--primary-h:#2b7de9;
  --success:#4caf7d;--warning:#f0a500;--danger:#e53935;
  --radius:10px;--sidebar-w:220px;--font:'Inter',sans-serif;--font-mono:'JetBrains Mono',monospace;
}
[data-theme="light"]{--bg:#f0f2f5;--bg2:#ffffff;--bg3:#f8f9fa;--border:#e0e0e0;--text:#1a1a2e;--text2:#666688;}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;}

/* Auth */
.auth-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;}
.auth-box{background:var(--bg2);border:1px solid var(--border);border-radius:16px;padding:2.5rem;width:100%;max-width:400px;}
.auth-logo{display:flex;align-items:center;gap:.75rem;margin-bottom:1.5rem;font-size:1.25rem;font-weight:700;}
.auth-box h2{font-size:1.5rem;margin-bottom:1.5rem;}
.auth-error{background:rgba(229,57,53,.12);color:var(--danger);border:1px solid rgba(229,57,53,.3);border-radius:8px;padding:.75rem 1rem;margin-bottom:1rem;font-size:.875rem;}
.auth-switch{margin-top:1rem;text-align:center;color:var(--text2);font-size:.875rem;}
.auth-switch a{color:var(--primary);text-decoration:none;}

/* Forms */
.form-group{margin-bottom:1rem;}
.form-group label{display:block;margin-bottom:.375rem;font-size:.8125rem;color:var(--text2);font-weight:500;}
input,select,textarea{width:100%;padding:.625rem .875rem;background:var(--bg3);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--font);font-size:.9375rem;outline:none;transition:border-color .15s;}
input:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(51,144,236,.15);}
input::placeholder{color:var(--text2);opacity:.6;}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border:none;border-radius:8px;font-family:var(--font);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s;text-decoration:none;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-h);}
.btn-secondary{background:var(--bg3);color:var(--text);border:1px solid var(--border);}
.btn-secondary:hover{border-color:var(--primary);}
.btn-danger{background:rgba(229,57,53,.15);color:var(--danger);border:1px solid rgba(229,57,53,.3);}
.btn-success{background:rgba(76,175,125,.15);color:var(--success);border:1px solid rgba(76,175,125,.3);}
.btn-full{width:100%;justify-content:center;min-height:2.75rem;font-size:1rem;}
.btn-icon{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:none;background:none;color:var(--text2);cursor:pointer;border-radius:6px;transition:all .15s;}
.btn-icon:hover{background:var(--bg3);color:var(--text);}
.btn-icon svg{width:1.125rem;height:1.125rem;}
.btn-sm{padding:.3rem .75rem;font-size:.8125rem;}

/* Layout */
.app{display:flex;height:100vh;overflow:hidden;}
.sidebar{width:var(--sidebar-w);background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;transition:left .25s;}
.sidebar-logo{display:flex;align-items:center;gap:.625rem;padding:1.25rem 1rem;font-size:1.0625rem;font-weight:700;border-bottom:1px solid var(--border);}
.sidebar-nav{flex:1;padding:.75rem .5rem;overflow-y:auto;}
.nav-item{display:flex;align-items:center;gap:.625rem;padding:.5rem .75rem;border-radius:8px;color:var(--text2);text-decoration:none;font-size:.875rem;font-weight:500;transition:all .15s;margin-bottom:.125rem;}
.nav-item svg{width:1.125rem;height:1.125rem;flex-shrink:0;}
.nav-item:hover{background:var(--bg3);color:var(--text);}
.nav-item.active{background:rgba(51,144,236,.15);color:var(--primary);}
.sidebar-footer{padding:.75rem .5rem;border-top:1px solid var(--border);display:flex;align-items:center;gap:.5rem;}
.user-info{display:flex;align-items:center;gap:.625rem;flex:1;overflow:hidden;}
.user-avatar{width:2rem;height:2rem;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:.875rem;flex-shrink:0;}
.user-email{font-size:.8125rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.user-role{font-size:.6875rem;color:var(--text2);text-transform:uppercase;letter-spacing:.05em;}
.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden;}
.topbar{display:flex;align-items:center;gap:1rem;padding:.75rem 1.5rem;border-bottom:1px solid var(--border);background:var(--bg2);}
.sidebar-toggle{display:none;}
.page-title{font-size:1.125rem;font-weight:600;flex:1;}
.topbar-right{display:flex;align-items:center;gap:.75rem;}
.balance-badge{background:rgba(76,175,125,.15);color:var(--success);border:1px solid rgba(76,175,125,.3);padding:.25rem .75rem;border-radius:20px;font-size:.8125rem;font-weight:600;}
.page{display:none;flex:1;overflow-y:auto;padding:1.5rem;}
.page.active{display:block;}

/* Cards */
.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;}
.card-title{font-size:.8125rem;color:var(--text2);font-weight:500;margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.05em;}
.card-value{font-size:1.75rem;font-weight:700;line-height:1;}
.card-sub{font-size:.8125rem;color:var(--text2);margin-top:.375rem;}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem;}

/* Tables */
.table-wrap{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;}
.table-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--border);}
.table-header h3{font-size:.9375rem;font-weight:600;}
.table-actions{display:flex;gap:.5rem;}
table{width:100%;border-collapse:collapse;}
thead th{padding:.625rem 1rem;text-align:left;font-size:.75rem;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border);background:var(--bg3);}
tbody td{padding:.75rem 1rem;font-size:.875rem;border-bottom:1px solid var(--border);}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover td{background:rgba(255,255,255,.02);}
.mono{font-family:var(--font-mono);font-size:.8125rem;}

/* Badges */
.badge{display:inline-flex;align-items:center;gap:.25rem;padding:.2rem .6rem;border-radius:20px;font-size:.75rem;font-weight:600;}
.badge-success{background:rgba(76,175,125,.15);color:var(--success);}
.badge-warning{background:rgba(240,165,0,.15);color:var(--warning);}
.badge-danger{background:rgba(229,57,53,.15);color:var(--danger);}
.badge-info{background:rgba(51,144,236,.15);color:var(--primary);}
.badge-default{background:var(--bg3);color:var(--text2);}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:1000;backdrop-filter:blur(4px);}
.modal{background:var(--bg2);border:1px solid var(--border);border-radius:16px;width:100%;max-width:480px;max-height:90vh;overflow-y:auto;}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 1.5rem;border-bottom:1px solid var(--border);}
.modal-header h3{font-size:1.0625rem;font-weight:600;}
#modal-body{padding:1.5rem;}

/* Chart */
.chart-wrap{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1.5rem;}
.chart-title{font-size:.9375rem;font-weight:600;margin-bottom:1rem;}
.chart-bars{display:flex;align-items:flex-end;gap:4px;height:120px;}
.chart-bar{flex:1;background:var(--primary);opacity:.7;border-radius:4px 4px 0 0;min-width:8px;transition:opacity .2s;cursor:pointer;position:relative;}
.chart-bar:hover{opacity:1;}

/* Crypto */
.crypto-address{background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:.875rem;font-family:var(--font-mono);font-size:.8125rem;word-break:break-all;cursor:pointer;transition:border-color .15s;}
.crypto-address:hover{border-color:var(--primary);}
.payment-amount{font-size:2rem;font-weight:700;color:var(--primary);text-align:center;margin:1rem 0;}
.payment-currency{font-size:.875rem;color:var(--text2);text-align:center;}
.payment-timer{text-align:center;color:var(--warning);font-size:.875rem;margin-top:.5rem;font-weight:600;}

/* Plans */
.plans-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;}
.plan-card{background:var(--bg2);border:2px solid var(--border);border-radius:var(--radius);padding:1.5rem;position:relative;transition:border-color .2s;}
.plan-card:hover{border-color:var(--primary);}
.plan-card.featured{border-color:var(--primary);}
.plan-card.featured::before{content:'Popular';position:absolute;top:-1px;right:1rem;background:var(--primary);color:#fff;font-size:.6875rem;font-weight:700;padding:.2rem .6rem;border-radius:0 0 6px 6px;}
.plan-name{font-size:1.125rem;font-weight:700;margin-bottom:.375rem;}
.plan-price{font-size:2rem;font-weight:700;color:var(--primary);}
.plan-price span{font-size:.875rem;color:var(--text2);font-weight:400;}
.plan-features{margin:1rem 0;}
.plan-feature{display:flex;align-items:center;gap:.5rem;font-size:.875rem;color:var(--text2);margin-bottom:.5rem;}
.plan-feature svg{width:1rem;height:1rem;color:var(--success);flex-shrink:0;}

/* Nodes */
.node-online{color:var(--success);}
.node-offline{color:var(--danger);}
.node-maintenance{color:var(--warning);}

/* Pagination */
.pagination{display:flex;align-items:center;justify-content:center;gap:.5rem;padding:1rem;}
.pagination button{padding:.375rem .75rem;border:1px solid var(--border);background:var(--bg3);color:var(--text);border-radius:6px;cursor:pointer;font-size:.875rem;}
.pagination button.active,.pagination button:hover{border-color:var(--primary);color:var(--primary);}
.pagination button:disabled{opacity:.4;cursor:not-allowed;}

/* Search */
.search-box{position:relative;}
.search-box input{padding-left:2.25rem;}
.search-box svg{position:absolute;left:.625rem;top:50%;transform:translateY(-50%);width:1rem;height:1rem;color:var(--text2);pointer-events:none;}

/* Misc */
.section-title{font-size:1rem;font-weight:600;margin-bottom:1rem;}
.mb-1{margin-bottom:.5rem;}.mb-2{margin-bottom:1rem;}.mb-3{margin-bottom:1.5rem;}
.flex{display:flex;}.gap-1{gap:.5rem;}.gap-2{gap:1rem;}.items-center{align-items:center;}.justify-between{justify-content:space-between;}
.text-muted{color:var(--text2);}.text-sm{font-size:.8125rem;}.text-right{text-align:right;}
.w-full{width:100%;}
.empty-state{text-align:center;padding:3rem;color:var(--text2);}
.empty-state svg{width:3rem;height:3rem;margin-bottom:1rem;opacity:.4;}

@media(max-width:768px){
  .sidebar{position:fixed;left:-100%;top:0;bottom:0;z-index:100;}
  .sidebar.open{left:0;}
  .sidebar-toggle{display:flex;}
  .stats-grid{grid-template-columns:1fr 1fr;}
  .page{padding:1rem;}
}