/* Shree Billing - ledger-inspired interface.
   Ink indigo on warm paper, ruled rows, tabular figures. */

:root {
  --paper:      #faf7f0;
  --paper-2:    #fffdf8;
  --rule:       #e2dbc9;
  --rule-firm:  #cdc3aa;
  --ink:        #1b2a4a;
  --ink-soft:   #5b6274;
  --ink-faint:  #8b8875;
  --accent:     #b8551f;
  --green-ok:   #2f6b44;
  --red:        #9d2c2c;
  --shadow:     0 1px 0 var(--rule-firm);
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); }

/* ---------- top bar ---------- */

.topbar {
  display: flex; align-items: center; gap: 28px;
  padding: 0 24px; height: 62px;
  background: var(--paper-2);
  border-bottom: 2px solid var(--ink);
  position: sticky; top: 0; z-index: 20;
}

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark {
  font: 600 17px/38px var(--serif);
  width: 38px; height: 38px; text-align: center;
  background: var(--ink); color: var(--paper-2);
}
.brand-text { font: 600 17px var(--serif); letter-spacing: .01em; display: block; }
.brand-text small { display: block; font: 400 11.5px var(--sans); color: var(--ink-faint); letter-spacing: .04em; }

.nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.nav a {
  text-decoration: none; padding: 7px 13px; color: var(--ink-soft);
  border: 1px solid transparent; border-radius: 2px; font-size: 14.5px;
}
.nav a:hover { color: var(--ink); background: #f1ebdc; }
.nav a.on { color: var(--ink); border-color: var(--rule-firm); background: var(--paper); font-weight: 600; }

.who { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--ink-soft); }

/* ---------- page frame ---------- */

.page { max-width: 1120px; margin: 0 auto; padding: 28px 24px 60px; }

.page-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px; border-bottom: 1px solid var(--rule-firm);
  padding-bottom: 12px; margin-bottom: 22px; flex-wrap: wrap;
}
.page-head h1 { font: 400 27px/1.2 var(--serif); margin: 0; }
.page-action { display: flex; gap: 8px; }

.foot {
  max-width: 1120px; margin: 0 auto; padding: 18px 24px 34px;
  display: flex; justify-content: space-between; gap: 12px;
  color: var(--ink-faint); font-size: 13px; border-top: 1px solid var(--rule);
}

/* ---------- notes ---------- */

.note {
  padding: 11px 14px; margin-bottom: 16px; font-size: 14.5px;
  background: var(--paper-2); border-left: 3px solid var(--ink-soft);
}
.note-success { border-color: var(--green-ok); }
.note-error   { border-color: var(--red); }
.note-info    { border-color: var(--accent); }

/* ---------- panels and tables ---------- */

.panel { background: var(--paper-2); border: 1px solid var(--rule-firm); }
.panel-head {
  padding: 13px 16px; border-bottom: 1px solid var(--rule);
  font: 600 14.5px var(--sans); display: flex; justify-content: space-between; align-items: center; gap: 10px;
}
.panel-body { padding: 16px; }

table { width: 100%; border-collapse: collapse; }
th {
  text-align: left; font: 600 12.5px var(--sans); color: var(--ink-faint);
  padding: 10px 14px; border-bottom: 1px solid var(--rule-firm); white-space: nowrap;
}
td { padding: 11px 14px; border-bottom: 1px solid var(--rule); vertical-align: middle; }
tbody tr:nth-child(even) { background: #fbf8f1; }
tbody tr:hover { background: #f4eee0; }
.num { text-align: right; font-variant-numeric: tabular-nums; font-family: var(--mono); font-size: 13.5px; }
.muted { color: var(--ink-faint); }
.empty { padding: 42px 16px; text-align: center; color: var(--ink-faint); }
.empty strong { display: block; font: 400 18px var(--serif); color: var(--ink); margin-bottom: 6px; }

.table-scroll { overflow-x: auto; }

/* ---------- forms ---------- */

.field { margin-bottom: 15px; }
label { display: block; font-size: 13.5px; color: var(--ink-soft); margin-bottom: 5px; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=date], input[type=tel], input[type=search], select, textarea {
  width: 100%; padding: 9px 11px; font: 15px var(--sans); color: var(--ink);
  background: var(--paper-2); border: 1px solid var(--rule-firm); border-radius: 2px;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 18px; }
.hint { font-size: 13px; color: var(--ink-faint); margin-top: 5px; }
.err { font-size: 13px; color: var(--red); margin-top: 5px; }

/* ---------- buttons ---------- */

.btn {
  display: inline-block; padding: 9px 16px; font: 600 14px var(--sans);
  border: 1px solid var(--ink); background: var(--ink); color: var(--paper-2);
  border-radius: 2px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: #142038; }
.btn-accent { background: var(--accent); border-color: var(--accent); }
.btn-accent:hover { background: #9c4416; }
.btn-line { background: transparent; color: var(--ink); border-color: var(--rule-firm); }
.btn-line:hover { background: #f1ebdc; }
.btn-quiet { background: transparent; color: var(--ink-soft); border-color: transparent; padding: 7px 10px; }
.btn-quiet:hover { color: var(--ink); background: #f1ebdc; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-danger { color: var(--red); border-color: #e0c7c7; background: transparent; }
.btn-danger:hover { background: #f7e9e9; }
.row-actions { display: flex; gap: 6px; justify-content: flex-end; }

/* ---------- tags ---------- */

.tag { font: 600 11.5px var(--sans); padding: 3px 8px; border: 1px solid var(--rule-firm); border-radius: 999px; }
.tag-paid { color: var(--green-ok); border-color: #bcd6c4; background: #f0f7f2; }
.tag-unpaid { color: var(--accent); border-color: #e6cdb8; background: #fbf1e8; }
.tag-cancelled { color: var(--red); border-color: #e0c7c7; background: #f9eeee; }
.tag-copy { color: var(--ink-soft); }

/* ---------- dashboard stats ---------- */

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 26px; }
.stat { background: var(--paper-2); border: 1px solid var(--rule-firm); padding: 16px 16px 14px; }
.stat .k { font-size: 13px; color: var(--ink-faint); }
.stat .v { font: 400 26px var(--serif); font-variant-numeric: tabular-nums; margin-top: 6px; }
.stat .s { font-size: 12.5px; color: var(--ink-faint); margin-top: 3px; }

.two-col { display: grid; grid-template-columns: 1.4fr 1fr; gap: 18px; align-items: start; }

/* ---------- sign-in screens ---------- */

.auth-wrap { min-height: 100vh; display: grid; grid-template-columns: 1.05fr 1fr; }
.auth-side {
  background: var(--ink); color: #e8e3d5; padding: 54px 48px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.auth-side .mark { font: 400 40px/1.1 var(--serif); color: var(--paper-2); }
.auth-side .mark span { display: block; font-size: 15px; letter-spacing: .1em; color: #9aa4bb; margin-bottom: 14px; }
.auth-side p { max-width: 34ch; line-height: 1.7; color: #c3c8d6; }
.auth-side ul { list-style: none; padding: 0; margin: 0; color: #c3c8d6; font-size: 14.5px; }
.auth-side li { padding: 9px 0; border-top: 1px solid #2c3c60; }

.auth-main { display: flex; align-items: center; justify-content: center; padding: 40px 24px; }
.auth-card { width: 100%; max-width: 380px; }
.auth-card h1 { font: 400 28px var(--serif); margin: 0 0 6px; }
.auth-card .lede { color: var(--ink-soft); margin: 0 0 26px; font-size: 14.5px; }
.auth-card .btn { width: 100%; text-align: center; padding: 11px; }

.otp-input {
  font: 600 27px/1 var(--mono); letter-spacing: .5em; text-align: center;
  padding: 15px 10px 15px 20px;
}
.seed-box { margin-top: 24px; padding: 12px 14px; background: #f3ecdc; border: 1px dashed var(--rule-firm); font-size: 13.5px; }
.seed-box code { font-family: var(--mono); }

/* ---------- bill builder ---------- */

.line-table input, .line-table select { padding: 7px 9px; font-size: 14px; }
.line-table td { padding: 7px 8px; }
.totals { margin-left: auto; width: 320px; }
.totals div { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px solid var(--rule); }
.totals .grand { border-bottom: none; border-top: 2px solid var(--ink); font: 600 19px var(--serif); padding-top: 11px; }
.totals .num { font-size: 15px; }

/* ---------- invoice print view ---------- */

.invoice { background: #fff; border: 1px solid var(--rule-firm); padding: 38px; max-width: 840px; margin: 0 auto; }
.invoice-head { display: flex; justify-content: space-between; gap: 24px; border-bottom: 2px solid var(--ink); padding-bottom: 18px; }
.invoice-head h2 { font: 400 26px var(--serif); margin: 0 0 4px; }
.invoice-meta { text-align: right; font-size: 14px; color: var(--ink-soft); }
.invoice-meta strong { color: var(--ink); font-family: var(--mono); }
.invoice-parties { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 20px 0; }
.invoice-parties h3 { font: 600 12.5px var(--sans); color: var(--ink-faint); margin: 0 0 7px; }
.invoice-foot { margin-top: 30px; padding-top: 16px; border-top: 1px solid var(--rule); display: flex; justify-content: space-between; color: var(--ink-faint); font-size: 13px; }
.copy-stamp { border: 2px solid var(--accent); color: var(--accent); font: 600 12px var(--sans); padding: 4px 10px; align-self: flex-start; }

@media print {
  .topbar, .foot, .page-head, .note, .no-print { display: none !important; }
  body { background: #fff; }
  .page { padding: 0; max-width: none; }
  .invoice { border: none; padding: 0; max-width: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .two-col, .auth-wrap { grid-template-columns: 1fr; }
  .auth-side { padding: 34px 26px; }
  .grid3 { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .topbar { height: auto; flex-wrap: wrap; padding: 12px 16px; gap: 12px; }
  .nav { margin-left: 0; width: 100%; }
  .grid2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .page { padding: 20px 14px 48px; }
}

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }