:root {
  /* Brand */
  --black: #0a0a0b;
  --panel: #141519;
  --panel-2: #1b1d22;
  --line: #2a2d34;
  --chrome-1: #eef1f4;
  --chrome-2: #b8bfc7;
  --chrome-3: #8a9099;
  --ink: #e7eaee;
  --muted: #9aa0a8;
  --red: #c1272d;
  --red-2: #e23b41;
  --green: #37b26b;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 70% -10%, #17181d 0%, var(--black) 60%);
  color: var(--ink);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.app { max-width: 1280px; margin: 0 auto; padding: 0 16px 80px; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 4px; position: sticky; top: 0; z-index: 20;
  background: linear-gradient(180deg, var(--black) 70%, transparent);
  backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { height: 46px; width: auto; filter: drop-shadow(0 2px 6px rgba(0,0,0,.5)); }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong {
  font-size: 18px; letter-spacing: .5px;
  background: linear-gradient(180deg, var(--chrome-1), var(--chrome-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.brand-text span { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 2px; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.badge {
  font-size: 11px; padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted);
}

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 6px; padding: 6px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 999px; margin: 6px 0 18px; width: fit-content; }
.tab { border: 0; background: transparent; color: var(--muted); padding: 8px 18px; border-radius: 999px;
  font-size: 14px; cursor: pointer; transition: .15s; }
.tab:hover { color: var(--ink); }
.tab.active { background: linear-gradient(180deg, var(--red-2), var(--red)); color: #fff; box-shadow: 0 4px 14px rgba(193,39,45,.35); }

.view { display: none; }
.view.active { display: block; }

/* ---------- Cards / forms ---------- */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; margin-bottom: 14px; }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; gap: 10px; flex-wrap: wrap; }
.card-head h3 { margin: 0; font-size: 15px; letter-spacing: .3px; display: flex; align-items: center; gap: 8px; }
.doc-number { font-family: ui-monospace, monospace; color: var(--chrome-2); font-size: 14px;
  border: 1px solid var(--line); padding: 3px 10px; border-radius: 8px; }
.head-actions { display: flex; gap: 8px; }

label { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--muted); }
label.wide { grid-column: 1 / -1; }
input, select, textarea {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--ink);
  border-radius: 9px; padding: 9px 11px; font-size: 14px; font-family: inherit; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(193,39,45,.18); }
textarea { resize: vertical; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.checkline { flex-direction: row; align-items: center; gap: 8px; color: var(--ink); font-size: 13px; margin-top: 8px; }
.checkline input { width: auto; }
.hint { font-size: 12px; color: var(--muted); margin: 8px 0 0; }
.opt::after { }
.internal { position: relative; }
.tag-internal { color: var(--red-2); font-size: 10px; text-transform: uppercase; letter-spacing: 1px; }

/* pills */
.pill { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .6px;
  padding: 3px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.pill.green { color: var(--green); border-color: rgba(55,178,107,.4); }
.pill.red { color: var(--red-2); border-color: rgba(226,59,65,.4); }

/* ---------- Editor layout ---------- */
.editor-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,520px); gap: 20px; align-items: start; }
.preview-col { position: sticky; top: 76px; }

/* line rows */
.lines { display: flex; flex-direction: column; gap: 8px; }
.line-row { display: grid; gap: 8px; align-items: center; background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.line-row.labor { grid-template-columns: 1fr 70px 70px 90px 30px; }
.line-row.diag  { grid-template-columns: 1fr 110px 30px; }
.line-row.part  { grid-template-columns: 1fr 56px 90px 30px; }
.line-row.fee   { grid-template-columns: 1fr 110px 30px; }
.line-row.pay   { grid-template-columns: 1fr 120px 110px 30px; }
.line-row input, .line-row select { padding: 7px 9px; font-size: 13px; }
.line-row .sub { grid-column: 1 / -1; display: flex; gap: 14px; flex-wrap: wrap; font-size: 11px; color: var(--muted); }
.line-row .sub label { flex-direction: row; align-items: center; gap: 5px; }
.line-row .sub input[type=checkbox], .line-row .sub input[type=number] { width: auto; }
.line-row .sub input[type=number] { width: 80px; }
.x-btn { background: transparent; border: 1px solid var(--line); color: var(--muted); border-radius: 8px;
  cursor: pointer; height: 32px; }
.x-btn:hover { color: var(--red-2); border-color: var(--red); }

.editor-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 4px; }

/* buttons */
.btn { border: 1px solid var(--line); background: var(--panel-2); color: var(--ink); padding: 10px 16px;
  border-radius: 10px; font-size: 14px; cursor: pointer; transition: .15s; }
.btn:hover { border-color: var(--chrome-3); }
.btn.primary { background: linear-gradient(180deg, var(--red-2), var(--red)); border-color: transparent; color: #fff;
  box-shadow: 0 6px 18px rgba(193,39,45,.35); }
.btn.ghost { background: transparent; }
.btn.sm { padding: 6px 12px; font-size: 12px; }

/* ---------- Preview toolbar ---------- */
.preview-toolbar { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.seg { display: flex; background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: 4px; }
.seg-btn { border: 0; background: transparent; color: var(--muted); padding: 6px 12px; border-radius: 999px;
  font-size: 12px; cursor: pointer; }
.seg-btn.active { background: var(--panel-2); color: var(--ink); }

.paper-wrap { background: #33363c; border-radius: 14px; padding: 18px; overflow: auto; max-height: calc(100vh - 160px); }

/* ============ THE INVOICE (white, printable) ============ */
.paper { background: #fff; color: #16181c; width: 100%; border-radius: 8px; overflow: hidden;
  box-shadow: var(--shadow); font-size: 13px; }
.paper .inv-header { background: #0a0a0b; color: #fff; padding: 22px 26px; display: flex;
  justify-content: space-between; align-items: flex-start; gap: 16px; border-bottom: 3px solid var(--red); }
.paper .inv-header img { height: 60px; }
.paper .biz { font-size: 11px; color: #b8bfc7; line-height: 1.5; margin-top: 8px; }
.paper .inv-title { text-align: right; }
.paper .inv-title h2 { margin: 0; font-size: 22px; letter-spacing: 3px;
  background: linear-gradient(180deg,#eef1f4,#8a9099); -webkit-background-clip: text; background-clip: text; color: transparent; }
.paper .inv-title .num { font-family: ui-monospace, monospace; color: #fff; font-size: 14px; margin-top: 4px; }
.paper .inv-title .date { color: #b8bfc7; font-size: 12px; margin-top: 2px; }

.paper .stamp { display: inline-block; margin-top: 8px; padding: 4px 12px; border-radius: 6px;
  font-weight: 700; letter-spacing: 1px; font-size: 12px; border: 2px solid; }
.stamp.paid { color: #1f8a4c; border-color: #1f8a4c; }
.stamp.due { color: var(--red); border-color: var(--red); }
.stamp.void { color: #777; border-color: #777; }
.stamp.partial { color: #b8791f; border-color: #b8791f; }

.paper .inv-body { padding: 22px 26px; }
.paper .parties { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.paper .party h4, .paper .sec-title { margin: 0 0 6px; font-size: 11px; text-transform: uppercase; letter-spacing: 1.4px; color: var(--red); }
.paper .party .val { font-size: 13px; line-height: 1.55; }
.paper .party .val strong { font-size: 14px; }

.paper table { width: 100%; border-collapse: collapse; margin: 6px 0 16px; }
.paper th { text-align: left; font-size: 10px; text-transform: uppercase; letter-spacing: .8px; color: #6b7079;
  border-bottom: 1.5px solid #d7dbe0; padding: 6px 8px; }
.paper th.r, .paper td.r { text-align: right; }
.paper td { padding: 8px; border-bottom: 1px solid #eceef1; vertical-align: top; }
.paper td .muted { color: #8a9099; font-size: 11px; }

.paper .totals { display: flex; justify-content: flex-end; margin-top: 4px; }
.paper .totals table { width: 320px; margin: 0; }
.paper .totals td { border: 0; padding: 4px 8px; }
.paper .totals .grand td { border-top: 2px solid #16181c; font-weight: 700; font-size: 16px; padding-top: 8px; }
.paper .totals .due td { color: var(--red); font-weight: 700; }
.paper .totals .credit td { color: #1f8a4c; }

.paper .clauses { margin-top: 18px; border-top: 1px solid #eceef1; padding-top: 12px; }
.paper .clauses .block { margin-bottom: 10px; }
.paper .clauses h5 { margin: 0 0 3px; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: #16181c; }
.paper .clauses p { margin: 0; font-size: 11px; color: #4a4f57; line-height: 1.5; }

.paper .sign { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 22px; }
.paper .sign .slot { border-top: 1px solid #16181c; padding-top: 5px; font-size: 11px; color: #6b7079; }

.paper .inv-footer { background: #f4f5f7; padding: 14px 26px; text-align: center; font-size: 11px; color: #6b7079;
  border-top: 1px solid #e4e7ea; }
.paper .inv-footer strong { color: #16181c; }

.internal-only { background: #fff7f7; }

/* ---------- List ---------- */
.toolbar { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar input { flex: 1; min-width: 180px; }
.inv-list { display: flex; flex-direction: column; gap: 8px; }
.inv-item { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; cursor: pointer; }
.inv-item:hover { border-color: var(--chrome-3); }
.inv-item .meta { display: flex; flex-direction: column; gap: 2px; }
.inv-item .num { font-family: ui-monospace, monospace; color: var(--chrome-2); font-size: 13px; }
.inv-item .who { font-size: 14px; }
.inv-item .sub { font-size: 12px; color: var(--muted); }
.inv-item .amt { text-align: right; }
.inv-item .amt strong { font-size: 15px; }
.st { font-size: 10px; padding: 3px 9px; border-radius: 999px; text-transform: uppercase; letter-spacing: .5px; }
.st.paid { color: #37b26b; border: 1px solid rgba(55,178,107,.4); }
.st.unpaid { color: var(--red-2); border: 1px solid rgba(226,59,65,.4); }
.st.partial { color: #d79a2b; border: 1px solid rgba(215,154,43,.4); }
.st.void { color: #888; border: 1px solid #444; }

.backup-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.file-btn { flex-direction: row; align-items: center; background: var(--panel-2); border: 1px solid var(--line);
  padding: 10px 16px; border-radius: 10px; cursor: pointer; color: var(--ink); font-size: 14px; }

.empty { text-align: center; color: var(--muted); padding: 30px; }

.beta-badge { color: #ffd54a; border-color: rgba(255,213,74,.5); font-weight: 700; letter-spacing: 1px; }
a.badge { text-decoration: none; }
a.badge:hover { color: var(--ink); border-color: var(--chrome-3); }
.app-footer { text-align: center; margin-top: 40px; padding: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.app-footer a { color: var(--chrome-2); }
.app-footer .small { font-size: 11px; margin-top: 4px; }

/* ---------- Toast ---------- */
.toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%); background: var(--panel-2);
  border: 1px solid var(--line); color: var(--ink); padding: 12px 20px; border-radius: 10px; box-shadow: var(--shadow);
  z-index: 50; font-size: 14px; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .editor-grid { grid-template-columns: 1fr; }
  .preview-col { position: static; }
  .grid-2, .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .line-row.labor { grid-template-columns: 1fr 1fr 1fr; }
  .line-row.part { grid-template-columns: 1fr 1fr; }
}

/* ---------- Print ---------- */
@media print {
  body { background: #fff; }
  .topbar, .tabs, .form-col, .preview-toolbar, .editor-actions, .app > *:not(main), .paper-wrap { }
  .app, main, .view, #view-editor { all: unset; display: block; }
  .topbar, .tabs, .form-col, .preview-toolbar, .editor-actions { display: none !important; }
  .editor-grid { display: block; }
  .paper-wrap { background: #fff; padding: 0; max-height: none; overflow: visible; }
  .paper { box-shadow: none; border-radius: 0; width: 100%; font-size: 12px; }
  .preview-col { position: static; }
  @page { size: letter; margin: 12mm; }
}