:root{--bg-base:#0f1117;--bg-surface:#161822;--bg-elevated:#1e2030;--bg-hover:#252840;--border:#2a2d3e;--border-light:#353851;--text-primary:#e4e7f0;--text-secondary:#9ca3b8;--text-muted:#636980;--accent:#6ee7b7;--accent-dim:#2d6a52;--accent-bg:rgba(110,231,183,0.08);--danger:#f87171;--danger-bg:rgba(248,113,113,0.1);--warning:#fbbf24;--info:#60a5fa;--success:#34d399;--radius-sm:6px;--radius:10px;--radius-lg:14px;--shadow:0 4px 24px rgba(0,0,0,0.25);--font:'DM Sans',system-ui,-apple-system,sans-serif;--font-mono:'JetBrains Mono',monospace;--sidebar-w:240px;--topbar-h:64px}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:15px}body{font-family:var(--font);background:var(--bg-base);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}

.app-layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;transition:transform .25s}
.sidebar-header{padding:20px 20px 16px;border-bottom:1px solid var(--border)}
.logo{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}
.sidebar-nav{flex:1;padding:12px 10px;display:flex;flex-direction:column;gap:2px}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);color:var(--text-secondary);font-weight:500;font-size:.93rem;text-decoration:none;transition:all .15s}
.nav-item:hover{background:var(--bg-hover);color:var(--text-primary);text-decoration:none}
.nav-item.active{background:var(--accent-bg);color:var(--accent)}
.nav-logout{color:var(--danger)}.nav-logout:hover{background:var(--danger-bg)}
.sidebar-footer{padding:10px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:2px}
.main-content{flex:1;margin-left:var(--sidebar-w);min-height:100vh}
.top-bar{height:var(--topbar-h);padding:0 32px;display:flex;align-items:center;border-bottom:1px solid var(--border);background:var(--bg-surface);position:sticky;top:0;z-index:50}
.page-title{font-size:1.15rem;font-weight:600;letter-spacing:-.01em}
.menu-toggle{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;margin-right:16px}
.content-area{padding:28px 32px 60px;max-width:1400px}

.card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin-bottom:20px}
.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.card-title{font-size:1.05rem;font-weight:600}

.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:28px}
.stat-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px 24px;display:flex;flex-direction:column;gap:6px}
.stat-label{font-size:.82rem;font-weight:500;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em}
.stat-value{font-size:1.8rem;font-weight:700;letter-spacing:-.03em;font-family:var(--font-mono)}
.stat-value.accent{color:var(--accent)}.stat-value.warning{color:var(--warning)}.stat-value.danger{color:var(--danger)}.stat-value.info{color:var(--info)}
.stat-sub{font-size:.82rem;color:var(--text-muted)}

.table-wrapper{overflow-x:auto;border-radius:var(--radius)}
table{width:100%;border-collapse:collapse}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap}
th{font-size:.78rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;background:var(--bg-elevated)}
td{font-size:.92rem}tr:hover td{background:var(--bg-hover)}
.text-right{text-align:right}.text-center{text-align:center}.text-mono{font-family:var(--font-mono);font-size:.88rem}

.status-badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.78rem;font-weight:600;background:color-mix(in srgb,var(--badge-color) 15%,transparent);color:var(--badge-color);text-transform:uppercase;letter-spacing:.04em}

.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border:none;border-radius:var(--radius-sm);font-family:var(--font);font-size:.9rem;font-weight:600;cursor:pointer;transition:all .15s;text-decoration:none;white-space:nowrap}
.btn-primary{background:var(--accent);color:#0f1117}.btn-primary:hover{background:#86efcb;text-decoration:none}
.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:var(--bg-hover);text-decoration:none}
.btn-danger{background:var(--danger-bg);color:var(--danger);border:1px solid rgba(248,113,113,0.2)}.btn-danger:hover{background:rgba(248,113,113,0.2);text-decoration:none}
.btn-sm{padding:6px 12px;font-size:.82rem}
.btn-group{display:flex;gap:8px;align-items:center}

.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.form-group{display:flex;flex-direction:column;gap:6px}.form-group.full-width{grid-column:1/-1}
.form-label{font-size:.82rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em}
.form-control{padding:10px 14px;background:var(--bg-base);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-family:var(--font);font-size:.92rem;transition:border-color .15s}
.form-control:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}
select.form-control{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239ca3b8'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}
textarea.form-control{min-height:100px;resize:vertical}
.form-actions{display:flex;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}

.flash-message{padding:14px 20px;border-radius:var(--radius);margin-bottom:20px;font-weight:500;font-size:.92rem}
.flash-success{background:rgba(52,211,153,0.1);color:var(--success);border:1px solid rgba(52,211,153,0.2)}
.flash-error{background:var(--danger-bg);color:var(--danger);border:1px solid rgba(248,113,113,0.2)}
.flash-info{background:rgba(96,165,250,0.1);color:var(--info);border:1px solid rgba(96,165,250,0.2)}

.pagination{display:flex;gap:4px;margin-top:20px;justify-content:center}
.pagination a,.pagination span{padding:8px 14px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:500;color:var(--text-secondary);background:var(--bg-surface);border:1px solid var(--border);text-decoration:none}
.pagination a:hover{background:var(--bg-hover);text-decoration:none}.pagination .active{background:var(--accent-bg);color:var(--accent);border-color:var(--accent-dim)}

.login-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-base);padding:20px}
.login-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px;width:100%;max-width:420px;box-shadow:var(--shadow)}
.login-logo{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:32px;font-size:1.5rem;font-weight:700}
.login-card .form-group{margin-bottom:18px}.login-card .btn{width:100%;justify-content:center;padding:12px;font-size:1rem}
.login-error{background:var(--danger-bg);color:var(--danger);padding:12px 16px;border-radius:var(--radius-sm);margin-bottom:18px;font-size:.9rem;border:1px solid rgba(248,113,113,0.2)}

.twofa-qr{text-align:center;margin:20px 0}.twofa-qr img{border-radius:var(--radius);border:4px solid #fff}
.twofa-secret{font-family:var(--font-mono);background:var(--bg-base);padding:10px 16px;border-radius:var(--radius-sm);font-size:1rem;letter-spacing:.15em;text-align:center;margin:12px 0;word-break:break-all}

.line-items-table{margin:20px 0}.line-items-table th{font-size:.75rem}.line-items-table td{padding:8px 10px;vertical-align:middle}.line-items-table .form-control{padding:8px 10px;font-size:.88rem}
.line-items-table .col-desc{width:40%}.line-items-table .col-qty{width:12%}.line-items-table .col-price{width:15%}.line-items-table .col-total{width:15%}.line-items-table .col-action{width:5%}
.add-line-btn{background:none;border:1px dashed var(--border-light);color:var(--accent);padding:10px;width:100%;border-radius:var(--radius-sm);cursor:pointer;font-family:var(--font);font-weight:500;font-size:.9rem;transition:all .15s}
.add-line-btn:hover{border-color:var(--accent);background:var(--accent-bg)}
.invoice-totals{display:flex;flex-direction:column;align-items:flex-end;gap:8px;margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}
.invoice-totals .row{display:flex;gap:24px;align-items:center}.invoice-totals .label{color:var(--text-muted);font-size:.9rem;min-width:120px;text-align:right}
.invoice-totals .value{font-family:var(--font-mono);font-weight:600;min-width:100px;text-align:right}
.invoice-totals .grand-total .value{font-size:1.3rem;color:var(--accent)}.invoice-totals .grand-total .label{font-weight:600;color:var(--text-primary)}

.invoice-doc{background:#fff;color:#1a1a2e;border-radius:var(--radius-lg);padding:48px;max-width:900px}
.invoice-doc h2{color:#1a1a2e;font-size:2rem;font-weight:700;margin-bottom:4px}.invoice-doc .inv-number{color:#6b7280;font-size:1.1rem}
.invoice-doc table th{background:#f3f4f6;color:#4b5563}.invoice-doc table td{color:#1a1a2e;border-color:#e5e7eb}.invoice-doc table tr:hover td{background:#f9fafb}

.report-filters{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap;margin-bottom:24px}.report-filters .form-group{margin-bottom:0}
.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state p{font-size:1rem;margin-bottom:16px}

.toggle-switch{position:relative;display:inline-block;width:44px;height:24px;flex-shrink:0}
.toggle-switch input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background:var(--bg-base);border:1px solid var(--border-light);border-radius:24px;transition:all .2s}
.toggle-slider::before{content:"";position:absolute;height:18px;width:18px;left:2px;bottom:2px;background:var(--text-muted);border-radius:50%;transition:all .2s}
.toggle-switch input:checked+.toggle-slider{background:var(--accent-dim);border-color:var(--accent)}
.toggle-switch input:checked+.toggle-slider::before{background:var(--accent);transform:translateX(20px)}

.lang-toggle{display:inline-flex;align-items:center;justify-content:center;padding:5px 12px;border-radius:var(--radius-sm);font-size:.8rem;font-weight:700;color:var(--text-muted);background:var(--bg-elevated);border:1px solid var(--border);text-decoration:none;letter-spacing:.05em;transition:all .15s}
.lang-toggle:hover{background:var(--bg-hover);color:var(--accent);text-decoration:none;border-color:var(--accent)}

@media(max-width:768px){.sidebar{transform:translateX(-100%)}.sidebar.open{transform:translateX(0)}.main-content{margin-left:0}.menu-toggle{display:block}.content-area{padding:20px 16px}.stats-grid{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}.report-filters{flex-direction:column;align-items:stretch}.top-bar{padding:0 16px}}
@media print{.sidebar,.top-bar,.btn,.flash-message{display:none!important}.main-content{margin-left:0}.content-area{padding:0}.invoice-doc{box-shadow:none;padding:0}body{background:#fff}}