/* ── GST Invoice Generator — style.css ─────────────────────────────────────── */

/* ── Design Tokens ───────────────────────────────────────────────────────────── */
:root {
  --ink:        #1c2b2a;
  --paper:      #f7f5ef;
  --paper-alt:  #eeece2;
  --line:       #c9c3b0;
  --accent:     #0e6e5c;
  --accent-dark:#0a4f42;
  --amber:      #b5732a;
  --danger:     #a13d2f;
  --white:      #ffffff;
  --mono:  'Poppins', sans-serif;
  --serif: 'Poppins', sans-serif;
  --sans:  'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
}

/* ── Reset ───────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper-alt);
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink);
  padding: 24px;
}

/* ── Sheet ───────────────────────────────────────────────────────────────────── */
.sheet {
  max-width: 1000px;
  margin: 0 auto;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 2px 0 var(--line), 0 12px 30px rgba(28,43,42,0.08);
}

/* ── Letterhead ──────────────────────────────────────────────────────────────── */
.letterhead {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 28px 32px 20px;
  border-bottom: 3px double var(--ink);
}
.letterhead-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-eyebrow {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin: 0 0 6px;
}
.brand-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 30px;
  margin: 0;
  line-height: 1.1;
}
.brand-sub {
  font-size: 12.5px;
  color: #5b5850;
  margin-top: 6px;
  max-width: 340px;
}
.doc-tag         { text-align: right; }
.doc-tag .label  { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--amber); }
.doc-tag .num    { font-family: var(--serif); font-size: 22px; margin-top: 2px; }

/* ── Tabs ────────────────────────────────────────────────────────────────────── */
.tabbar {
  display: flex;
  gap: 2px;
  padding: 0 32px;
  background: var(--paper-alt);
  border-bottom: 1px solid var(--line);
}
.tab-btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 12px 18px;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: #7a7669;
  cursor: pointer;
  position: relative;
  top: 1px;
}
.tab-btn .n {
  display: inline-block;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--line);
  color: var(--paper);
  font-size: 10px;
  text-align: center;
  line-height: 16px;
  margin-right: 6px;
}
.tab-btn.active              { color: var(--ink); border-bottom-color: var(--accent); background: var(--paper); }
.tab-btn.active .n           { background: var(--accent); }
.tab-btn.done .n             { background: var(--accent-dark); }

/* ── Panels ──────────────────────────────────────────────────────────────────── */
.panel          { display: none; padding: 26px 32px; }
.panel.active   { display: block; }

/* ── Section headings ────────────────────────────────────────────────────────── */
h3.section-head {
  font-family: var(--serif);
  font-size: 15px;
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
h3.section-head span.hint {
  font-family: var(--sans);
  font-size: 11px;
  color: #8a8676;
  font-weight: 400;
}

/* ── Grid & Fields ───────────────────────────────────────────────────────────── */
.grid2       { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 20px; }
.field       { margin-bottom: 14px; }
.field label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #6f6c5f;
  margin-bottom: 4px;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--ink);
  border-radius: 2px;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,110,92,0.12);
}

.radio-row       { display: flex; gap: 18px; align-items: center; }
.radio-row label { display: flex; align-items: center; gap: 6px; font-size: 12.5px; text-transform: none; color: var(--ink); margin: 0; }
.radio-row input { width: auto; }

/* ── Product table ───────────────────────────────────────────────────────────── */
table.items {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}
table.items thead th {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #6f6c5f;
  text-align: left;
  padding: 8px 6px;
  border-bottom: 2px solid var(--ink);
}
table.items tbody td {
  padding: 6px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.items input,
table.items select {
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  padding: 5px 4px;
  font-size: 12.5px;
  font-family: var(--sans);
  border-radius: 2px;
  color: var(--ink);
}
table.items input:focus,
table.items select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--white);
}
table.items input[type=number]  { text-align: right; }
.num-col                        { text-align: right; }

.rm-btn {
  background: none;
  border: 1px solid var(--line);
  color: var(--danger);
  width: 24px; height: 24px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
}
.rm-btn:hover { background: var(--danger); color: var(--white); border-color: var(--danger); }

.add-row-btn {
  margin-top: 12px;
  background: var(--paper);
  border: 1px dashed var(--accent);
  color: var(--accent-dark);
  padding: 8px 14px;
  font-size: 12px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .05em;
  cursor: pointer;
  border-radius: 2px;
}
.add-row-btn:hover { background: rgba(14,110,92,0.08); }

.gst-mode {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 16px 0 4px;
  padding: 10px 12px;
  background: var(--paper-alt);
  border: 1px solid var(--line);
  font-size: 12.5px;
}

/* ── Nav Buttons ─────────────────────────────────────────────────────────────── */
.nav-buttons {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.btn {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 10px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  border-radius: 2px;
  text-decoration: none;
  display: inline-block;
}
.btn.ghost  { background: transparent; color: var(--ink); }
.btn.accent { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn.danger { background: var(--danger); border-color: var(--danger); }
.btn:disabled { opacity: .35; cursor: not-allowed; }
.btn.sm { padding: 6px 12px; font-size: 11px; }

/* ── Preview ─────────────────────────────────────────────────────────────────── */
.preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin-bottom: 18px; }
.preview-block { font-size: 12.5px; }
.preview-block .lbl { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; color: var(--amber); letter-spacing: .08em; margin-bottom: 4px; }
.preview-block .val { line-height: 1.5; }
.preview-block .val b { font-family: var(--serif); font-size: 14px; }

table.preview-items { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 12px; }
table.preview-items th {
  background: var(--ink); color: var(--paper);
  padding: 8px 6px; text-align: left; font-size: 10.5px; text-transform: uppercase; letter-spacing: .04em;
}
table.preview-items td { padding: 7px 6px; border-bottom: 1px solid var(--line); }
table.preview-items td.num,
table.preview-items th.num { text-align: right; }

.totals {
  margin-top: 16px;
  margin-left: auto;
  width: 300px;
  font-size: 12.5px;
}
.totals .row { display: flex; justify-content: space-between; padding: 5px 0; border-bottom: 1px solid var(--line); }
.totals .row.grand {
  border-bottom: none;
  border-top: 2px solid var(--ink);
  margin-top: 4px;
  padding-top: 8px;
  font-family: var(--serif);
  font-size: 16px;
}
.amount-words {
  margin-top: 14px;
  font-size: 11.5px;
  font-style: italic;
  color: #5b5850;
  border-top: 1px dashed var(--line);
  padding-top: 10px;
}
.footer-note {
  margin-top: 26px;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: #8a8676;
}
.signature-box { text-align: center; }
.signature-line { margin-top: 36px; border-top: 1px solid var(--ink); padding-top: 4px; width: 160px; }

/* ── Suggest Dropdown ────────────────────────────────────────────────────────── */
.suggest-wrap {
  position: relative;
  width: 100%;
}
/* Inside a .field the input is already full-width; inside table cells we need this */
.suggest-wrap input {
  width: 100%;
}
.suggest-list {
  position: absolute;
  top: calc(100% + 1px);
  left: 0;
  right: 0;
  z-index: 300;
  background: var(--white);
  border: 1px solid var(--accent);
  border-top: none;
  border-radius: 0 0 3px 3px;
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 230px;
  overflow-y: auto;
  box-shadow: 0 6px 18px rgba(28,43,42,0.12);
  display: none;
}
.suggest-list li {
  padding: 8px 10px;
  cursor: pointer;
  font-size: 12.5px;
  line-height: 1.4;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}
.suggest-list li:last-child { border-bottom: none; }
.suggest-list li:hover,
.suggest-list li.sg-active  { background: var(--paper-alt); }
.suggest-list li.sg-empty   { color: #8a8676; font-style: italic; cursor: default; }
.suggest-list li.sg-empty:hover { background: none; }
.suggest-list li mark {
  background: rgba(14,110,92,0.15);
  color: var(--accent-dark);
  font-weight: 600;
  border-radius: 1px;
}
.suggest-list small { color: #8a8676; font-size: 10.5px; display: block; margin-top: 2px; }

/* ── Toast ───────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 20px;
  border-radius: 3px;
  font-size: 13.5px;
  font-family: var(--sans);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 9999;
  pointer-events: none;
  max-width: 340px;
}
.toast.toast--visible { opacity: 1; transform: translateY(0); }
.toast.toast--error   { background: var(--danger); }
.toast.toast--success { background: var(--accent-dark); }

/* ── Login Page ──────────────────────────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 2px 0 var(--line), 0 12px 30px rgba(28,43,42,0.08);
  padding: 40px 48px;
  width: 100%;
  max-width: 380px;
}
.login-card h1 {
  font-family: var(--serif);
  font-size: 22px;
  margin: 0 0 6px;
}
.login-card p.sub {
  font-size: 12px;
  color: #6f6c5f;
  margin: 0 0 28px;
}
.login-error {
  background: #fdf0ee;
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 8px 12px;
  font-size: 12.5px;
  border-radius: 2px;
  margin-bottom: 16px;
}

/* ── Invoices List Page ──────────────────────────────────────────────────────── */
.page-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-alt);
}
.search-wrap {
  display: flex;
  gap: 8px;
  align-items: center;
}
.search-wrap input {
  padding: 7px 10px;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink);
  border-radius: 2px;
  width: 240px;
}
.search-wrap input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(14,110,92,0.12); }

.inv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.inv-table th {
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #6f6c5f;
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--ink);
}
.inv-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
.inv-table tr:hover td { background: var(--paper-alt); }
.inv-table .td-amount  { text-align: right; font-family: var(--mono); }
.inv-table .td-actions { text-align: right; white-space: nowrap; }
.inv-table .td-actions a,
.inv-table .td-actions button {
  font-size: 11px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 4px 9px;
  border-radius: 2px;
  cursor: pointer;
  text-decoration: none;
  margin-left: 4px;
}
.inv-table .td-actions a.open { border: 1px solid var(--accent); color: var(--accent-dark); background: transparent; }
.inv-table .td-actions a.dup  { border: 1px solid var(--line); color: var(--ink); background: transparent; }
.inv-table .td-actions button.del { border: 1px solid var(--danger); color: var(--danger); background: transparent; }
.inv-table .td-actions a.open:hover    { background: var(--accent-dark); color: var(--paper); }
.inv-table .td-actions a.dup:hover     { background: var(--ink); color: var(--paper); }
.inv-table .td-actions button.del:hover { background: var(--danger); color: var(--paper); }

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: #8a8676;
  font-size: 14px;
}
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 20px;
}
.pagination a {
  padding: 6px 12px;
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  font-size: 12px;
  border-radius: 2px;
}
.pagination a.cur { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pagination a:hover:not(.cur) { background: var(--paper-alt); }

/* ── Print ───────────────────────────────────────────────────────────────────── */
@media print {
  body                  { background: var(--white); padding: 0; }
  .tabbar, .nav-buttons,
  .no-print             { display: none !important; }
  .sheet                { border: none; box-shadow: none; max-width: 100%; }
  .panel                { display: none !important; }
  #panel-preview        { display: block !important; padding: 20px 28px; }
  .toast                { display: none !important; }
}

/* ── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  body                    { padding: 10px; }
  .grid2                  { grid-template-columns: 1fr; }
  .preview-grid           { grid-template-columns: 1fr; }
  .tabbar                 { overflow-x: auto; padding: 0 12px; }
  .letterhead             { flex-direction: column; gap: 14px; }
  .doc-tag                { text-align: left; }
  .login-card             { padding: 28px 20px; }
  .search-wrap input      { width: 160px; }
  .totals                 { width: 100%; }
}