/* ===== Facturación · estética minimalista ===== */
:root{
  --bg:#fafafa; --surface:#ffffff; --ink:#161616; --muted:#6b6b6b;
  --line:#e6e6e6; --line-strong:#111; --accent:#111111; --accent-ink:#ffffff;
  --ok:#10794f; --err:#b3261e; --warn:#8a6d00;
  --radius:9px; --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 24px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  background:var(--bg); color:var(--ink); font-size:15px; line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
h1,h2,h3{font-weight:600; letter-spacing:-.01em}
h1{font-size:22px;margin:0}
.muted{color:var(--muted)}
.small{font-size:13px}

/* ---- Topbar ---- */
.topbar{
  background:var(--surface); border-bottom:1px solid var(--line);
  position:sticky; top:0; z-index:10;
}
.topbar .inner{max-width:1040px;margin:0 auto;display:flex;align-items:center;gap:28px;padding:0 24px;height:60px}
.brand{font-weight:700;letter-spacing:.3px;font-size:17px}
.brand small{display:block;font-size:10px;font-weight:400;color:var(--muted);letter-spacing:.5px}
.nav{display:flex;gap:6px;margin-left:8px}
.nav a{padding:8px 14px;border-radius:7px;text-decoration:none;color:var(--muted);font-size:14px;font-weight:500}
.nav a:hover{background:var(--bg);color:var(--ink)}
.nav a.active{color:var(--ink);background:#f0f0f0}
.topbar .spacer{flex:1}
.who{font-size:13px;color:var(--muted)}

/* ---- Layout ---- */
.wrap{max-width:1040px;margin:30px auto;padding:0 24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card .pad{padding:24px}
.card-title{padding:18px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px}
.card-title h2{font-size:16px;margin:0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:760px){.grid2{grid-template-columns:1fr}}

/* ---- Form ---- */
label.field{display:block;margin-bottom:14px}
label.field span{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);margin-bottom:5px}
input,select,textarea{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:7px;
  font-size:14px;font-family:inherit;background:#fff;color:var(--ink);outline:none;
}
input:focus,select:focus,textarea:focus{border-color:var(--line-strong)}
textarea{resize:vertical;min-height:64px}
.row-inline{display:flex;gap:10px;align-items:flex-end}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:10px 18px;border-radius:8px;border:1px solid var(--line-strong);
  background:var(--accent);color:var(--accent-ink);font-size:14px;font-weight:600;
  cursor:pointer;text-decoration:none;transition:opacity .15s;
}
.btn:hover{opacity:.85}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{background:var(--bg);opacity:1}
.btn.danger{background:transparent;color:var(--err);border-color:var(--line)}
.btn.danger:hover{background:#fcecea;opacity:1}
.btn.sm{padding:6px 12px;font-size:13px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---- Invoice lines table ---- */
table.lines{width:100%;border-collapse:collapse}
table.lines th{font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);text-align:left;padding:0 8px 8px;font-weight:600}
table.lines th.num,table.lines td.num{text-align:right}
table.lines td{padding:6px 8px;vertical-align:middle}
table.lines input{padding:8px 10px}
table.lines .calc{font-variant-numeric:tabular-nums;color:var(--muted);white-space:nowrap}
.linedel{border:none;background:none;color:var(--muted);cursor:pointer;font-size:18px;line-height:1;padding:4px 6px;border-radius:6px}
.linedel:hover{color:var(--err);background:#fcecea}

/* ---- Totals ---- */
.totals{margin-left:auto;max-width:320px}
.totals .line{display:flex;justify-content:space-between;padding:6px 0;font-variant-numeric:tabular-nums}
.totals .grand{border-top:2px solid var(--line-strong);margin-top:6px;padding-top:10px;font-weight:700;font-size:18px}

/* ---- Data table (BBDD / admin) ---- */
table.data{width:100%;border-collapse:collapse;font-size:14px}
table.data th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);padding:12px 14px;border-bottom:1px solid var(--line-strong)}
table.data td{padding:12px 14px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
table.data tr:hover td{background:#fcfcfc}
table.data .num{text-align:right;white-space:nowrap}

/* ---- Badges ---- */
.tag{display:inline-block;font-size:11px;letter-spacing:.4px;padding:3px 9px;border-radius:20px;border:1px solid var(--line);text-transform:uppercase;font-weight:600}
.tag.ok{color:var(--ok);border-color:#bfe3d1;background:#f0faf5}
.tag.warn{color:var(--warn);border-color:#e8dca8;background:#fbf8ec}
.tag.err{color:var(--err);border-color:#eecac6;background:#fcf0ee}
.tag.mock{color:var(--muted);background:#f4f4f4}

/* ---- Alerts ---- */
.alert{padding:12px 16px;border-radius:8px;font-size:14px;margin-bottom:16px;border:1px solid}
.alert.ok{background:#f0faf5;border-color:#bfe3d1;color:var(--ok)}
.alert.err{background:#fcf0ee;border-color:#eecac6;color:var(--err)}
.alert.info{background:#f4f6f8;border-color:#dde3e8;color:#41525e}

/* ---- Login ---- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.login-card{width:100%;max-width:380px}
.login-card .head{text-align:center;margin-bottom:24px}
.login-card .head .brand{font-size:22px}

/* ---- Misc ---- */
.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.toolbar .spacer{flex:1}
.hint{font-size:12px;color:var(--muted);margin-top:4px}
.modal-back{position:fixed;inset:0;background:rgba(0,0,0,.35);display:none;align-items:center;justify-content:center;z-index:50}
.modal-back.show{display:flex}
.modal{background:#fff;border-radius:12px;max-width:420px;width:90%;padding:24px;box-shadow:var(--shadow)}