*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#f1f5f9;--surface:#fff;--surface-hover:#f8fafc;--border:#e2e8f0;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--brand:#6366f1;--brand-hover:#4f46e5;--accent:#06b6d4;--success:#22c55e;--warning:#f59e0b;--error:#ef4444;--radius:12px;--radius-lg:20px;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow:0 1px 4px rgba(0,0,0,.08);--shadow-lg:0 10px 25px -5px rgba(0,0,0,.1);--sidebar-w:260px;--topbar-h:64px;--font:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif}
html{font-size:16px}
body{font-family:var(--font);color:var(--text-primary);background:var(--bg);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-hover)}
button,input,textarea,select{font:inherit}
button{cursor:pointer;border:0}
input,textarea,select{min-height:44px;border:1px solid var(--border);border-radius:var(--radius);padding:10px 14px;background:var(--surface);color:var(--text-primary);width:100%;transition:border-color .2s,box-shadow .2s}
input:focus,textarea:focus,select:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
label{display:flex;flex-direction:column;gap:6px;font-size:.875rem;font-weight:600;color:var(--text-secondary)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 20px;border-radius:var(--radius);font-weight:600;font-size:.875rem;transition:all .2s;white-space:nowrap}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--text-secondary)}
.btn-ghost:hover{background:var(--surface-hover);color:var(--text-primary)}
.btn-sm{min-height:34px;padding:0 14px;font-size:.8125rem}

/* == Login == */
.login-page{min-height:100vh;display:grid;grid-template-columns:1fr 440px;align-items:stretch}
.login-brand{display:flex;flex-direction:column;justify-content:center;padding:60px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff}
.login-brand h1{font-size:clamp(2rem,5vw,4rem);font-weight:800;line-height:1.15;margin:12px 0 8px}
.login-brand p{font-size:1.125rem;opacity:.85;max-width:400px}
.login-brand .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:100px;background:rgba(255,255,255,.15);font-size:.8125rem;font-weight:600;backdrop-filter:blur(4px)}
.login-card-wrap{display:flex;align-items:center;justify-content:center;padding:32px}
.login-card{width:100%;max-width:380px}
.login-card h2{font-size:1.5rem;font-weight:700;margin-bottom:4px}
.login-card .sub{color:var(--text-muted);font-size:.875rem;margin-bottom:28px}
.login-card form{display:flex;flex-direction:column;gap:18px}
.login-card .btn{width:100%;margin-top:4px}
.login-card .alert{padding:12px 16px;border-radius:var(--radius);background:#fef2f2;color:var(--error);font-size:.875rem;font-weight:500;border:1px solid #fecaca}

/* == Layout theme == */
.theme-body{display:flex;min-height:100vh}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:98;opacity:0;transition:opacity .3s}
.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);background:#0f172a;color:#fff;display:flex;flex-direction:column;z-index:99;transition:transform .3s ease;overflow-y:auto}
.sidebar-brand{padding:20px 20px 16px;border-bottom:1px solid rgba(255,255,255,.08)}
.sidebar-brand strong{display:block;font-size:1.05rem;font-weight:700}
.sidebar-brand small{display:block;color:rgba(255,255,255,.45);font-size:.8125rem;margin-top:2px}
.sidebar-nav{padding:12px 10px;flex:1;display:flex;flex-direction:column;gap:2px}
.sidebar-nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius);color:rgba(255,255,255,.7);font-size:.875rem;font-weight:500;transition:all .2s}
.sidebar-nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.sidebar-nav a.active{background:rgba(99,102,241,.2);color:var(--brand);font-weight:600}
.sidebar-nav .nav-label{font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,.3);padding:16px 12px 6px}
.sidebar-footer{padding:14px 10px;border-top:1px solid rgba(255,255,255,.08)}
.sidebar-footer .user-info{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius)}
.sidebar-footer .avatar{width:34px;height:34px;border-radius:50%;background:var(--brand);display:flex;align-items:center;justify-content:center;font-size:.8125rem;font-weight:700;color:#fff;flex-shrink:0}
.sidebar-footer .user-meta{min-width:0}
.sidebar-footer .user-name{font-size:.8125rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-footer .user-plan{font-size:.6875rem;color:rgba(255,255,255,.45)}
.main-area{flex:1;margin-left:var(--sidebar-w);display:flex;flex-direction:column;min-height:100vh}
.topbar{height:var(--topbar-h);display:flex;align-items:center;justify-content:space-between;padding:0 28px;background:rgba(248,250,252,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.topbar-left{display:flex;align-items:center;gap:12px}
.menu-toggle{display:none;align-items:center;justify-content:center;width:38px;height:38px;border-radius:var(--radius);background:transparent;color:var(--text-secondary);font-size:1.25rem;transition:background .2s}
.menu-toggle:hover{background:var(--surface-hover)}
.topbar-right{display:flex;align-items:center;gap:16px}
.topbar-info{text-align:right;font-size:.8125rem}
.topbar-info .name{font-weight:600;color:var(--text-primary)}
.topbar-info .detail{color:var(--text-muted);font-size:.75rem}
.main-content{flex:1;padding:28px}
.page-header{margin-bottom:28px}
.page-header h1{font-size:1.625rem;font-weight:700;margin-bottom:4px}
.page-header p{color:var(--text-secondary);font-size:.9375rem}

/* == Cards == */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-bottom:28px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:all .25s;cursor:default}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:transparent}
.card-icon{width:44px;height:44px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.25rem;margin-bottom:14px;background:var(--surface-hover)}
.card h3{font-size:1rem;font-weight:600;margin-bottom:4px}
.card p{font-size:.8125rem;color:var(--text-secondary)}
.card .card-value{font-size:1.75rem;font-weight:800;color:var(--brand);margin-bottom:2px}
.card .card-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600}
.hero-card{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;border:0;border-radius:var(--radius-lg);padding:32px}
.hero-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.hero-card h2{font-size:1.75rem;font-weight:700;margin-bottom:6px}
.hero-card p{opacity:.85;font-size:.9375rem;margin-bottom:16px}
.hero-card .badge-wrap{display:flex;flex-wrap:wrap;gap:8px}
.hero-card .badge-wrap span{padding:4px 12px;border-radius:100px;background:rgba(255,255,255,.15);font-size:.75rem;font-weight:600;backdrop-filter:blur(4px)}

/* == Status pages == */
.status-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.status-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:48px;max-width:440px;width:100%;text-align:center;box-shadow:var(--shadow-lg)}
.status-card .status-icon{font-size:3rem;margin-bottom:12px}
.status-card h1{font-size:1.5rem;font-weight:700;margin-bottom:8px}
.status-card p{color:var(--text-secondary);font-size:.9375rem;margin-bottom:20px}

/* == Utils == */
.text-center{text-align:center}
.text-muted{color:var(--text-muted)}
.mt-4{margin-top:16px}
.gap-2{gap:8px}
.flex{display:flex}
.flex-wrap{flex-wrap:wrap}
.items-center{align-items:center}

/* == Responsive == */
@media(max-width:900px){
  .login-page{grid-template-columns:1fr}
  .login-brand{display:none}
  .login-card-wrap{padding:24px}
}
@media(max-width:768px){
  .menu-toggle{display:flex}
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay.open{display:block;opacity:1}
  .main-area{margin-left:0}
  .topbar{padding:0 16px}
  .main-content{padding:16px}
  .card-grid{grid-template-columns:1fr}
  .hero-card{padding:24px}
}
@media(min-width:769px){
  .sidebar-overlay{display:none!important}
}

/* == Checkout == */
.alert{padding:12px 16px;border-radius:var(--radius);background:#fef2f2;color:var(--error);font-size:.875rem;font-weight:500;border:1px solid #fecaca}
select{-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23475569' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}