:root{
  --bg:#05080f; --bg-alt:#0a101c; --bg-card:#0d1526; --bg-card2:#111b30;
  --text:#e8eef7; --muted:#92a3b8; --accent:#3b82f6; --accent2:#22d3ee;
  --green:#4ade80; --amber:#fbbf24; --red:#f87171; --border:#1c2a44; --border2:#2d4a6e;
  --grad:linear-gradient(135deg,var(--accent),var(--accent2));
  --font:'Space Grotesk',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --body:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --mono:'JetBrains Mono','SF Mono',Consolas,monospace;
  --radius:12px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--body);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}
a{color:inherit;text-decoration:none}
h1{font-family:var(--font);font-size:1.6rem;font-weight:700;letter-spacing:-.5px}
h3{font-family:var(--font);font-size:1rem;font-weight:600;margin-bottom:12px}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted);font-size:.9rem}
.mono{font-family:var(--mono)}
.num{text-align:right;font-variant-numeric:tabular-nums}

/* logo */
.logo{font-family:var(--font);font-weight:700;letter-spacing:-.5px;display:inline-flex;align-items:center;gap:8px;color:var(--text)}
.logo-mark{width:26px;height:26px;border-radius:7px;background:var(--grad);display:inline-flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:.66rem;font-weight:700;color:#fff;box-shadow:0 0 14px rgba(59,130,246,.45)}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* topbar */
.topbar{position:sticky;top:0;z-index:50;background:rgba(5,8,15,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.topbar .wrap{display:flex;align-items:center;gap:18px;height:60px}
.brand{display:flex;align-items:baseline;gap:8px}
.brand-sub{font-family:var(--mono);font-size:.66rem;text-transform:uppercase;letter-spacing:2px;color:var(--muted)}
.topbar nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.topbar nav a{padding:8px 14px;border-radius:9px;font-size:.9rem;font-weight:500;color:var(--muted)}
.topbar nav a:hover{color:var(--text);background:rgba(59,130,246,.08)}
.topbar nav a.active{color:var(--text);background:rgba(59,130,246,.14)}
.logout-form{display:inline}
.logout{background:none;border:1px solid var(--border);color:var(--muted);padding:8px 14px;border-radius:9px;font-size:.85rem;cursor:pointer;font-family:inherit}
.logout:hover{border-color:var(--red);color:var(--red)}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:1px solid var(--border);border-radius:8px;width:40px;height:40px;align-items:center;justify-content:center;cursor:pointer;margin-left:auto}
.nav-toggle span{width:18px;height:2px;background:var(--text);border-radius:2px}

.main{padding:30px 20px 60px}
.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:11px 20px;border-radius:10px;font-size:.9rem;font-weight:600;font-family:var(--body);cursor:pointer;border:1px solid transparent;transition:all .18s;white-space:nowrap}
.btn.sm{padding:8px 14px;font-size:.82rem}
.btn-primary{background:linear-gradient(135deg,var(--accent),#2563eb);color:#fff;box-shadow:0 0 20px rgba(59,130,246,.3)}
.btn-primary:hover{box-shadow:0 0 30px rgba(59,130,246,.5);transform:translateY(-1px)}
.btn-ghost{background:rgba(59,130,246,.05);border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent2)}
.btn-danger{background:rgba(248,113,113,.08);border-color:rgba(248,113,113,.3);color:var(--red)}
.btn-danger:hover{background:rgba(248,113,113,.16)}

/* cards / forms */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:18px}
.card.narrow{max-width:620px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid2.tight{gap:12px}
label{display:block;font-size:.82rem;font-weight:600;color:var(--text);margin-bottom:12px}
label.inline{display:inline-flex;align-items:center;gap:8px;font-size:.82rem}
input,select,textarea{width:100%;margin-top:5px;background:var(--bg);border:1px solid var(--border);border-radius:9px;padding:10px 12px;color:var(--text);font-family:var(--body);font-size:.92rem}
label.inline input{margin-top:0;width:auto}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.15)}
textarea{resize:vertical;line-height:1.5}
select{cursor:pointer}
.form-actions{display:flex;gap:10px;margin-top:6px}

/* stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:20px}
.stat{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.stat-label{display:block;font-size:.74rem;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:8px}
.stat-num{font-family:var(--font);font-size:1.7rem;font-weight:700;letter-spacing:-1px}
.stat-num.amber{color:var(--amber)} .stat-num.green{color:var(--green)}

/* table */
.table-card{padding:0;overflow:hidden}
.table{width:100%;border-collapse:collapse;font-size:.9rem}
.table th{text-align:left;font-size:.72rem;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);padding:14px 16px;border-bottom:1px solid var(--border);font-weight:600}
.table td{padding:14px 16px;border-bottom:1px solid var(--border)}
.table tbody tr:last-child td{border-bottom:none}
.table tbody tr:hover{background:rgba(59,130,246,.04)}
.row-actions{display:flex;gap:12px}
.row-actions a{color:var(--accent);font-size:.84rem;font-weight:600}
.row-actions a:hover{color:var(--accent2)}
.empty{text-align:center;color:var(--muted);padding:36px!important}
.empty a{color:var(--accent);font-weight:600}

/* pills */
.pill{display:inline-block;font-size:.7rem;font-weight:700;padding:3px 10px;border-radius:100px;text-transform:uppercase;letter-spacing:.5px}
.pill.paid{background:rgba(74,222,128,.14);color:var(--green)}
.pill.unpaid{background:rgba(251,191,36,.14);color:var(--amber)}
.pill.overdue{background:rgba(248,113,113,.16);color:var(--red)}
.pill.big{font-size:.78rem;padding:5px 14px}

/* toast */
.toast{padding:12px 16px;border-radius:10px;font-weight:600;font-size:.9rem;margin-bottom:18px}
.toast.ok{background:rgba(74,222,128,.1);border:1px solid rgba(74,222,128,.3);color:var(--green)}

/* auth */
.auth{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(ellipse at top,rgba(59,130,246,.1),transparent 60%)}
.auth-card{width:100%;max-width:400px;background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:34px}
.auth-brand{display:flex;align-items:baseline;gap:8px;margin-bottom:24px;justify-content:center}
.auth-card h1{font-size:1.5rem;margin-bottom:6px}
.auth-lead{color:var(--muted);font-size:.9rem;margin-bottom:20px}
.stack{display:flex;flex-direction:column;gap:4px}
.stack .btn{margin-top:10px}
.form-err{background:rgba(248,113,113,.1);border:1px solid rgba(248,113,113,.3);color:var(--red);padding:10px 14px;border-radius:9px;font-size:.86rem;font-weight:600;margin-bottom:16px}

/* invoice form line items */
.li-head{display:grid;grid-template-columns:1fr 90px 110px 34px;gap:10px;font-size:.72rem;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);padding:0 2px 6px}
.li-row{display:grid;grid-template-columns:1fr 90px 110px 34px;gap:10px;margin-bottom:8px}
.li-row input{margin-top:0}
.li-del{background:rgba(248,113,113,.08);border:1px solid var(--border);color:var(--red);border-radius:8px;cursor:pointer;font-size:1.1rem;line-height:1}
.li-del:hover{background:rgba(248,113,113,.18)}
.totals-edit{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.totals-edit .inline input{width:110px}
.grand{margin-left:auto;font-size:1.05rem}
.grand strong{font-family:var(--font);font-size:1.4rem;color:var(--accent2);margin-left:8px}

/* invoice actions bar */
.inv-actions{display:flex;align-items:center;gap:8px;margin-bottom:18px;flex-wrap:wrap}
.inv-actions .spacer{flex:1}
.inline-form{display:inline}

/* dashboard quick toggle + tags */
.head-actions{display:flex;gap:10px;flex-wrap:wrap}
.row-actions{align-items:center;flex-wrap:wrap}
.tag-mini{font-family:var(--mono);font-size:.58rem;text-transform:uppercase;letter-spacing:.5px;color:var(--accent2);border:1px solid var(--border2);border-radius:5px;padding:1px 6px;vertical-align:middle}
.link-btn{background:none;border:none;font-family:inherit;font-weight:600;font-size:.84rem;cursor:pointer;padding:0}
.link-btn.to-paid{color:var(--green)}
.link-btn.to-unpaid{color:var(--amber)}
.link-btn:hover{text-decoration:underline}

/* uploaded invoice view */
.upload-view{display:grid;grid-template-columns:300px 1fr;gap:18px;align-items:start}
.up-info .up-amount{font-family:var(--font);font-size:2rem;font-weight:700;letter-spacing:-1px;color:var(--accent2);line-height:1}
.up-info .pill.big{margin:12px 0 16px}
.up-info dl{margin:0;border-top:1px solid var(--border);padding-top:6px}
.up-info dl>div{display:flex;justify-content:space-between;gap:12px;padding:8px 0;font-size:.88rem;border-bottom:1px solid var(--border)}
.up-info dl>div:last-child{border-bottom:none}
.up-info dt{color:var(--muted)}
.up-info dd{margin:0;text-align:right;max-width:60%}
.up-file{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:14px;text-align:center}
.up-file img{max-width:100%;border-radius:8px;display:block;margin:0 auto}
.pdf-box{padding:46px 20px;color:var(--muted)}
.pdf-box p{margin-bottom:14px}

/* ---------- printable invoice paper ---------- */
.paper{position:relative;overflow:hidden;background:#fff;color:#1a2230;border-radius:14px;padding:48px 52px;max-width:820px;margin:0 auto;box-shadow:0 30px 80px rgba(0,0,0,.5);font-family:var(--body);-webkit-print-color-adjust:exact;print-color-adjust:exact}
.paper::before{content:'';position:absolute;top:0;left:0;right:0;height:6px;background:linear-gradient(90deg,#3b82f6,#22d3ee);-webkit-print-color-adjust:exact;print-color-adjust:exact}
.paper-top{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:34px}
.paper .from-logo .logo{color:#0d1526;font-size:1.15rem}
.paper .from-logo .logo-mark{box-shadow:none;width:30px;height:30px}
.paper .from-logo .grad{-webkit-text-fill-color:#2563eb}
.from-lines{display:flex;flex-direction:column;margin-top:14px;font-size:.82rem;color:#5a6678;line-height:1.6}
.from-lines strong{color:#1a2230;font-size:.95rem;margin-bottom:2px}
.inv-meta{text-align:right}
.inv-title{font-family:var(--font);font-size:1.8rem;font-weight:700;letter-spacing:3px;color:#1a2230}
.inv-no{font-family:var(--mono);font-size:.82rem;color:#8a93a6;margin:3px 0 12px}
.paper-grid{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:30px;padding:22px 0;border-top:1px solid #eef1f6;border-bottom:1px solid #eef1f6}
.paper-grid strong{font-size:1rem;display:block;margin-bottom:3px}
.paper .lbl{font-size:.64rem;text-transform:uppercase;letter-spacing:1.2px;color:#9aa3b2;font-weight:700;margin-bottom:5px}
.paper-dates{text-align:right;font-size:.88rem;display:flex;flex-direction:column;gap:7px;color:#5a6678}
.paper-dates .lbl{display:inline;margin-right:6px;margin-bottom:0}
.addr{white-space:pre-line;color:#5a6678;font-size:.86rem;margin-top:3px;line-height:1.5}
.paper-items{width:100%;border-collapse:collapse;margin-bottom:26px}
.paper-items th{text-align:left;font-size:.66rem;text-transform:uppercase;letter-spacing:.8px;color:#9aa3b2;padding:0 14px 12px;border-bottom:1.5px solid #1a2230}
.paper-items th.num,.paper-items td.num{text-align:right}
.paper-items td{padding:15px 14px;border-bottom:1px solid #f0f2f6;font-size:.9rem;vertical-align:top;line-height:1.5}
.paper-items tbody tr:last-child td{border-bottom:none}
.paper-items td:first-child{color:#2a3340}
.paper-foot{display:flex;justify-content:space-between;gap:36px;flex-wrap:wrap;align-items:flex-start}
.notes{flex:1;min-width:220px;font-size:.83rem;color:#5a6678;line-height:1.6}
.paper-totals{min-width:270px;font-size:.9rem}
.paper-totals>div{display:flex;justify-content:space-between;padding:8px 0;color:#5a6678}
.paper-totals .grand-row{border-top:2px solid #1a2230;margin-top:8px;padding-top:14px;color:#1a2230;font-weight:700;font-size:1.25rem;font-family:var(--font)}
.paper-totals .grand-row span:last-child{color:#2563eb}
.paper-thanks{text-align:center;color:#9aa3b2;font-size:.82rem;margin-top:34px;padding-top:22px;border-top:1px solid #eef1f6}
.paper .pill{-webkit-print-color-adjust:exact;print-color-adjust:exact;border:1px solid transparent}
.paper .pill.paid{background:#e7f9ee;color:#15803d;border-color:#bbf0cd}
.paper .pill.unpaid{background:#fef6e0;color:#a16207;border-color:#f5e2b0}
.paper .pill.overdue{background:#fdecec;color:#b91c1c;border-color:#f6cccc}

@media (max-width:760px){
  .grid2,.stats,.upload-view{grid-template-columns:1fr}
  .topbar nav{position:fixed;top:60px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg-alt);border-bottom:1px solid var(--border);padding:10px;gap:4px;display:none}
  body.nav-open .topbar nav{display:flex}
  .nav-toggle{display:flex}
  .li-head{display:none}
  .li-row{grid-template-columns:1fr 1fr;gap:8px}
  .li-row .li-desc{grid-column:1/3}
  .paper{padding:30px 22px}
  .up-info dd{max-width:none}
}

@media print{
  html,body{background:#fff!important;-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .topbar,.inv-actions,.nav-toggle{display:none!important}
  .main{padding:0;max-width:none}
  .paper{box-shadow:none;max-width:none;border-radius:0;padding:24px 0 0}
  @page{margin:1.4cm}
}