*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #ffffff;--bg-subtle: #fafafa;--bg-muted: #f4f4f5;--text: #18181b;--text-secondary: #3f3f46;--text-muted: #71717a;--text-faint: #a1a1aa;--border: #e4e4e7;--border-strong: #d4d4d8;--accent: #18181b;--accent-hover: #27272a;--danger: #dc2626;--danger-bg: #fef2f2;--success: #16a34a;--success-bg: #dcfce7;--info: #2563eb;--info-bg: #dbeafe;--warning: #d97706;--warning-bg: #fef3c7;--radius: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", monospace}body{font-family:var(--font);color:var(--text);background:var(--bg-muted);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.admin-layout{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--text);color:#fff;padding:24px 0;display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:50}.sidebar-brand{padding:0 24px 24px;font-size:18px;font-weight:600;letter-spacing:-.02em;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:8px}.sidebar-nav{flex:1;padding:8px 12px}.sidebar-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius);font-size:14px;color:#ffffffa6;transition:all .15s;margin-bottom:2px}.sidebar-link:hover{background:#ffffff14;color:#fff}.sidebar-link.active{background:#ffffff1f;color:#fff;font-weight:500}.sidebar-icon{width:18px;height:18px;opacity:.7}.sidebar-footer{padding:16px 24px;border-top:1px solid rgba(255,255,255,.1)}.sidebar-footer-text{font-size:13px;color:#ffffff80}.main-content{flex:1;margin-left:240px;padding:32px 40px;max-width:1200px}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.page-title{font-size:22px;font-weight:600;letter-spacing:-.02em;color:var(--text)}.page-subtitle{font-size:14px;color:var(--text-muted);margin-top:4px}.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.card-title{font-size:16px;font-weight:600;color:var(--text)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:28px}.stat-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px 24px;box-shadow:var(--shadow-sm)}.stat-label{font-size:13px;color:var(--text-muted);margin-bottom:4px}.stat-value{font-size:28px;font-weight:600;letter-spacing:-.02em;color:var(--text)}.stat-change{font-size:13px;margin-top:4px}.table-wrapper{overflow-x:auto}table{width:100%;border-collapse:collapse}thead th{text-align:left;font-size:12px;font-weight:500;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);padding:12px 16px;border-bottom:1px solid var(--border)}tbody td{padding:14px 16px;font-size:14px;border-bottom:1px solid var(--bg-muted);color:var(--text-secondary)}tbody tr:hover{background:var(--bg-subtle)}tbody tr:last-child td{border-bottom:none}.table-link{color:var(--text);font-weight:500}.table-link:hover{text-decoration:underline}.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:99px;font-size:12px;font-weight:500;border:1px solid}.badge-draft{background:#f4f4f5;color:#71717a;border-color:#e4e4e7}.badge-sent{background:#dbeafe;color:#1d4ed8;border-color:#93c5fd}.badge-paid{background:#dcfce7;color:#16a34a;border-color:#86efac}.badge-overdue{background:#fef2f2;color:#dc2626;border-color:#fca5a5}.badge-cancelled{background:#f4f4f5;color:#a1a1aa;border-color:#d4d4d8}.badge-pending{background:#fef3c7;color:#d97706;border-color:#fcd34d}.badge-succeeded{background:#dcfce7;color:#16a34a;border-color:#86efac}.badge-failed{background:#fef2f2;color:#dc2626;border-color:#fca5a5}.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;border:1px solid transparent;transition:all .15s;font-family:inherit;line-height:1.4}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--bg);color:var(--text);border-color:var(--border-strong)}.btn-secondary:hover{background:var(--bg-muted)}.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}.btn-danger:hover{opacity:.9}.btn-ghost{background:transparent;color:var(--text-muted);padding:6px 10px}.btn-ghost:hover{background:var(--bg-muted);color:var(--text)}.btn-sm{padding:6px 12px;font-size:13px}.btn-lg{padding:12px 24px;font-size:15px}.btn:disabled{opacity:.5;cursor:not-allowed}.form-group{margin-bottom:20px}.form-label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:6px}.form-input{width:100%;padding:9px 12px;border:1px solid var(--border-strong);border-radius:var(--radius);font-size:14px;font-family:inherit;color:var(--text);background:var(--bg);transition:border-color .15s;outline:none}.form-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #18181b14}.form-input::placeholder{color:var(--text-faint)}textarea.form-input{min-height:80px;resize:vertical}select.form-input{-webkit-appearance:none;-moz-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='%2371717a' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}.form-error{font-size:13px;color:var(--danger);margin-top:4px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-hint{font-size:13px;color:var(--text-faint);margin-top:4px}.alert{padding:12px 16px;border-radius:var(--radius);font-size:14px;margin-bottom:20px;border:1px solid}.alert-error{background:var(--danger-bg);color:var(--danger);border-color:#fca5a5}.alert-success{background:var(--success-bg);color:var(--success);border-color:#86efac}.alert-info{background:var(--info-bg);color:var(--info);border-color:#93c5fd}.empty-state{text-align:center;padding:48px 24px;color:var(--text-muted)}.empty-state-icon{font-size:32px;margin-bottom:12px;opacity:.5}.empty-state-text{font-size:15px;margin-bottom:16px}.line-items-table{width:100%;margin-bottom:16px}.line-items-table th{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);padding:8px 0;text-align:left;border-bottom:1px solid var(--border)}.line-items-table td{padding:10px 12px 10px 0;border-bottom:1px solid var(--bg-muted)}.line-items-table .col-desc{width:50%}.line-items-table .col-qty{width:12%}.line-items-table .col-price{width:18%}.line-items-table .col-amount{width:15%;text-align:right}.line-items-table .col-action{width:5%;text-align:center}.totals-section{display:flex;justify-content:flex-end;margin-top:16px}.totals-table{width:280px}.totals-table tr td{padding:6px 0;font-size:14px}.totals-table tr td:last-child{text-align:right;font-weight:500}.totals-table .total-row td{font-size:16px;font-weight:600;border-top:2px solid var(--text);padding-top:10px}.checkout-page{min-height:100vh;background:var(--bg-muted);display:flex;align-items:center;justify-content:center;padding:40px 20px}.checkout-container{width:100%;max-width:480px}.checkout-brand{text-align:center;margin-bottom:28px}.checkout-brand h1{font-size:20px;font-weight:600;color:var(--text)}.checkout-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow);margin-bottom:16px}.checkout-summary{margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--border)}.checkout-summary h2{font-size:15px;font-weight:500;color:var(--text-muted);margin-bottom:12px}.checkout-total{font-size:32px;font-weight:600;letter-spacing:-.02em;color:var(--text);margin-bottom:4px}.checkout-invoice-num{font-size:14px;color:var(--text-muted)}.checkout-items{margin:16px 0}.checkout-item{display:flex;justify-content:space-between;padding:8px 0;font-size:14px;color:var(--text-secondary)}.checkout-item-desc{flex:1}.checkout-item-amount{font-weight:500;margin-left:16px}.checkout-footer{text-align:center;font-size:12px;color:var(--text-faint)}.checkout-footer a{color:var(--text-muted);text-decoration:underline}.checkout-success{text-align:center;padding:24px 0}.checkout-success-icon{width:56px;height:56px;background:var(--success-bg);border-radius:50%;display:inline-flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:28px;color:var(--success)}.pay-btn{width:100%;padding:14px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:15px;font-weight:500;cursor:pointer;transition:background .15s;font-family:inherit;margin-top:20px}.pay-btn:hover{background:var(--accent-hover)}.pay-btn:disabled{opacity:.5;cursor:not-allowed}.stripe-element{padding:12px;border:1px solid var(--border-strong);border-radius:var(--radius);background:var(--bg);transition:border-color .15s}.stripe-element--focus{border-color:var(--accent);box-shadow:0 0 0 3px #18181b14}.login-page{min-height:100vh;background:var(--bg-muted);display:flex;align-items:center;justify-content:center;padding:40px 20px}.login-container{width:100%;max-width:380px}.login-brand{text-align:center;margin-bottom:32px}.login-brand h1{font-size:24px;font-weight:600;letter-spacing:-.02em}.login-brand p{font-size:14px;color:var(--text-muted);margin-top:4px}.login-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow)}@media (max-width: 768px){.sidebar{width:100%;position:relative;padding:16px 0}.sidebar-nav{display:flex;overflow-x:auto;padding:8px;gap:4px}.sidebar-link{white-space:nowrap}.main-content{margin-left:0;padding:20px 16px}.admin-layout{flex-direction:column}.form-row{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}}.copy-url-group{display:flex;gap:8px;align-items:center}.copy-url-input{flex:1;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:13px;font-family:var(--font-mono);color:var(--text-secondary);background:var(--bg-subtle)}.text-right{text-align:right}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-sm{font-size:13px}.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.flex{display:flex}.gap-2{gap:8px}.gap-3{gap:12px}.items-center{align-items:center}.justify-between{justify-content:space-between}.font-mono{font-family:var(--font-mono)}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}