:root{--bg:#f7f7f8;--surface:#fff;--text:#17181a;--muted:#757980;--line:#e7e8ea;--soft:#f0f1f2;--green:#17764a;--amber:#835915;--amber-bg:#f7efd9}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}a{color:inherit}.brand{font-size:12px;font-weight:750;letter-spacing:2.2px}.muted,.subtle{color:var(--muted)}.small{font-size:12px}
.topbar{height:70px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 30px}.link{text-decoration:none;font-size:13px;color:var(--muted)}
.admin-shell{max-width:1040px;margin:auto;padding:40px 22px 70px}.hero-row{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:22px}.hero-row h1{font-size:34px;letter-spacing:-1.2px;margin:0 0 6px}.hero-row p{margin:0}.hero-actions{display:flex;gap:8px}.hero-actions form{margin:0}
.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;margin:16px 0}.panel-head{margin-bottom:16px}.panel h2{font-size:17px;margin:0 0 4px}.panel p{margin:0}
.customer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;align-items:end}label{font-size:12px;color:var(--muted);display:block;margin-bottom:6px}input{width:100%;border:1px solid #dadddf;border-radius:9px;padding:10px 11px;font-size:14px;outline:none}.check-row{display:flex;align-items:center;padding-bottom:8px}.check-row label{display:flex;align-items:center;gap:7px;margin:0;color:var(--text)}.check-row input{width:auto}
.btn{border:0;border-radius:9px;padding:10px 13px;font-size:13px;font-weight:650;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.btn.primary{background:#17181a;color:#fff}.btn.secondary{background:#eff0f1;color:#17181a}.btn.ghost{background:#fff;border:1px solid var(--line)}.btn.wide{width:100%}
.invoice-row{display:grid;grid-template-columns:1.2fr .4fr .4fr 1.8fr;gap:16px;align-items:center;padding:14px 0;border-top:1px solid var(--line)}.invoice-row:first-child{border-top:0}.invoice-id,.amount{font-weight:700}.row-actions{display:flex;justify-content:flex-end;gap:6px;flex-wrap:wrap}.row-actions form{margin:0}
.status{display:inline-flex;padding:6px 9px;border-radius:999px;font-size:10px;font-weight:750;background:var(--amber-bg);color:var(--amber)}.status.paid{background:#e7f3ec;color:var(--green)}
.activity-row{display:grid;grid-template-columns:1fr .5fr .7fr;padding:9px 0;border-top:1px solid var(--line);font-size:12px}.activity-row:first-child{border-top:0}.empty{text-align:center;color:var(--muted);padding:24px;font-size:13px}
.flash{padding:11px 13px;border-radius:9px;margin-bottom:12px;font-size:13px}.flash.success{background:#edf7f1;color:#13653f}.flash.error{background:#fff0ef;color:#9f2d25}
.auth-wrap,.confirm-wrap{min-height:100vh;display:grid;place-items:center;padding:22px}.auth-card,.confirm-card{width:min(390px,100%);background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px}.auth-card h1,.confirm-card h1{font-size:28px;letter-spacing:-.8px;margin:28px 0 6px}.confirm-card{text-align:center}.confirm-card p{line-height:1.55;margin:8px 0 24px}.quiet-link{display:inline-block;margin-top:16px;font-size:13px;color:var(--muted);text-decoration:none}
.invoice-page{width:min(820px,calc(100% - 28px));margin:28px auto;background:#fff;border:1px solid var(--line);border-radius:18px;padding:36px 40px 28px}.invoice-top{display:flex;justify-content:space-between;align-items:center;font-size:12px}.hairline{height:1px;background:var(--line);margin:26px 0}.invoice-heading{font-size:42px;letter-spacing:-2px;margin:34px 0 28px}.invoice-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.invoice-meta div,.parties div{display:flex;flex-direction:column;gap:7px}.invoice-meta span,.parties span{font-size:11px;color:var(--muted)}.invoice-meta strong{font-size:14px;font-weight:550}.parties{display:grid;grid-template-columns:1fr 1fr;gap:60px}.parties strong{font-size:15px}.parties p{margin:0;font-size:13px;color:var(--muted)}
.line-item{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:start}.line-item p{margin:5px 0 0;color:var(--muted);font-size:13px}.total{text-align:right;display:flex;flex-direction:column;gap:6px;margin:24px 0 34px}.total span{font-size:12px;color:var(--muted)}.total strong{font-size:28px;letter-spacing:-.7px}
.pay-card{background:#f4f5f6;border-radius:14px;padding:22px}.pay-card p{margin:0 0 16px;color:var(--muted);font-size:14px}.pay-actions{display:flex;gap:8px;flex-wrap:wrap}.paid-card{display:flex;align-items:center;gap:12px;background:#edf6f1;border-radius:14px;padding:20px}.paid-card p{margin:3px 0 0;color:var(--muted);font-size:13px}.paid-dot{width:32px;height:32px;border-radius:50%;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:700}.paid-dot.big{margin:0 auto;width:42px;height:42px}
.invoice-footer{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:22px;margin-top:30px;font-size:12px;color:var(--muted)}.invoice-footer a{text-decoration:none;color:var(--text)}
@media(max-width:720px){.customer-grid{grid-template-columns:1fr}.hero-row{align-items:flex-start;flex-direction:column}.invoice-row{grid-template-columns:1fr 1fr}.row-actions{grid-column:1/-1;justify-content:flex-start}.invoice-page{padding:28px 22px}.invoice-heading{font-size:34px}.invoice-meta{grid-template-columns:1fr 1fr}.parties{grid-template-columns:1fr;gap:24px}.invoice-footer{flex-direction:column}}