/* ============================================================
   InvoiceFlow — Main Stylesheet
   ============================================================ */

:root {
  --bg:           #0f0f11;
  --surface:      #18181c;
  --surface2:     #222228;
  --surface3:     #2a2a32;
  --border:       #2e2e38;
  --border2:      #3a3a48;
  --text:         #f0f0f4;
  --text2:        #9898a8;
  --text3:        #5a5a70;
  --accent:       #6366f1;
  --accent2:      #818cf8;
  --accent-glow:  rgba(99,102,241,0.15);
  --green:        #22c55e;
  --green-dim:    rgba(34,197,94,0.1);
  --yellow:       #f59e0b;
  --yellow-dim:   rgba(245,158,11,0.1);
  --red:          #ef4444;
  --red-dim:      rgba(239,68,68,0.1);
  --blue:         #3b82f6;
  --blue-dim:     rgba(59,130,246,0.1);
  --radius:       10px;
  --radius-lg:    16px;
  --shadow:       0 4px 24px rgba(0,0,0,0.4);
  --font-display: 'DM Serif Display', serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'DM Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body { font-family: var(--font-body); background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.6; }
a { color: var(--accent2); text-decoration: none; }
button { cursor: pointer; font-family: var(--font-body); }
input, select, textarea { font-family: var(--font-body); }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius);
  font-weight: 500; font-size: 0.875rem; border: none; transition: .2s; cursor: pointer;
}
.btn-primary   { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent2); transform: translateY(-1px); }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--surface3); }
.btn-ghost     { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); border-color: var(--border2); }
.btn-danger    { background: var(--red-dim); color: var(--red); border: 1px solid rgba(239,68,68,.2); }
.btn-danger:hover { background: var(--red); color: #fff; }
.btn-success   { background: var(--green-dim); color: var(--green); border: 1px solid rgba(34,197,94,.2); }
.btn-success:hover { background: var(--green); color: #fff; }
.btn-full      { width: 100%; justify-content: center; padding: 12px; }
.btn-sm        { padding: 6px 14px; font-size: .8rem; }

/* ── Form controls ────────────────────────────────────────── */
.form-group  { margin-bottom: 18px; }
.form-group label { display: block; font-size: .8rem; font-weight: 500; color: var(--text2); margin-bottom: 6px; letter-spacing: .04em; text-transform: uppercase; }
.form-control { width: 100%; background: var(--surface2); border: 1px solid var(--border); color: var(--text); padding: 10px 14px; border-radius: var(--radius); font-size: .9rem; transition: .2s; }
.form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-control[readonly] { background: var(--surface3); cursor: default; }
select.form-control option { background: var(--surface2); }
.form-row      { display: grid; gap: 16px; }
.form-row-2    { grid-template-columns: 1fr 1fr; }
.form-row-3    { grid-template-columns: 1fr 1fr 1fr; }
.form-hint     { font-size: .75rem; color: var(--text3); margin-top: 4px; }

/* ── Layout ───────────────────────────────────────────────── */
.app-layout { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar    { background: var(--surface); border-right: 1px solid var(--border); padding: 24px 0; display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.main-content  { overflow-y: auto; height: 100vh; }
.content-area  { padding: 32px; max-width: 1200px; }

/* ── Sidebar ──────────────────────────────────────────────── */
.sidebar-brand   { padding: 0 20px 24px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.brand-name      { font-family: var(--font-display); font-size: 1.4rem; color: var(--text); }
.brand-name span { color: var(--accent2); }
.brand-tagline   { font-size: .72rem; color: var(--text3); margin-top: 2px; }
.nav-section     { padding: 0 12px; margin-bottom: 8px; }
.nav-label       { font-size: .68rem; font-weight: 600; color: var(--text3); letter-spacing: .08em; text-transform: uppercase; padding: 0 8px; margin-bottom: 6px; }
.nav-item        { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 8px; color: var(--text2); font-size: .875rem; cursor: pointer; transition: .15s; border: none; background: none; width: 100%; text-align: left; }
.nav-item:hover  { color: var(--text); background: var(--surface2); }
.nav-item.active { color: var(--accent2); background: var(--accent-glow); font-weight: 500; }
.nav-item svg    { width: 16px; height: 16px; flex-shrink: 0; }
.sidebar-footer  { margin-top: auto; padding: 16px 20px 0; border-top: 1px solid var(--border); }
.user-email      { font-size: .78rem; color: var(--text2); }
.logout-btn      { color: var(--text3); font-size: .78rem; cursor: pointer; background: none; border: none; margin-top: 4px; padding: 0; }
.logout-btn:hover { color: var(--red); }

/* ── Page header ──────────────────────────────────────────── */
.page-header    { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.page-title     { font-family: var(--font-display); font-size: 1.8rem; color: var(--text); }
.page-subtitle  { color: var(--text3); font-size: .85rem; margin-top: 2px; }
.header-actions { display: flex; gap: 10px; align-items: center; }

/* ── Stats grid ───────────────────────────────────────────── */
.stats-grid   { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-bottom: 32px; }
.stat-card    { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px 22px; }
.stat-label   { font-size: .75rem; color: var(--text3); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
.stat-value   { font-family: var(--font-mono); font-size: 1.6rem; font-weight: 500; color: var(--text); }
.stat-meta    { font-size: .75rem; color: var(--text3); margin-top: 4px; }

/* ── Table ────────────────────────────────────────────────── */
.table-wrap   { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.table-header { padding: 18px 22px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.table-title  { font-weight: 500; font-size: .9rem; }
.search-input { background: var(--surface2); border: 1px solid var(--border); color: var(--text); padding: 7px 14px; border-radius: 8px; font-size: .825rem; width: 220px; }
.search-input:focus { outline: none; border-color: var(--accent); }
table  { width: 100%; border-collapse: collapse; }
th     { text-align: left; padding: 10px 16px; font-size: .72rem; font-weight: 600; color: var(--text3); text-transform: uppercase; letter-spacing: .06em; border-bottom: 1px solid var(--border); }
td     { padding: 13px 16px; font-size: .85rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td      { background: var(--surface2); }
.invoice-preview tr:hover td      { background: var(--text); }
.invoice-num     { font-family: var(--font-mono); font-size: .82rem; color: var(--accent2); }
.client-name     { font-weight: 500; }
.client-email    { font-size: .78rem; color: var(--text3); }
.amount          { font-family: var(--font-mono); font-weight: 500; }

/* ── Badges ───────────────────────────────────────────────── */
.badge         { display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 100px; font-size: .72rem; font-weight: 600; letter-spacing: .03em; text-transform: uppercase; }
.badge-draft   { background: var(--surface3); color: var(--text2); }
.badge-sent    { background: var(--blue-dim); color: var(--blue); }
.badge-paid    { background: var(--green-dim); color: var(--green); }
.badge-overdue { background: var(--red-dim); color: var(--red); }

/* ── Row actions ──────────────────────────────────────────── */
.row-actions   { display: flex; gap: 6px; opacity: 0; transition: .15s; }
tr:hover .row-actions { opacity: 1; }
.icon-btn      { background: var(--surface2); border: 1px solid var(--border); color: var(--text2); padding: 5px; border-radius: 6px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; transition: .15s; }
.icon-btn:hover { color: var(--text); border-color: var(--border2); background: var(--surface3); }
.icon-btn svg  { width: 14px; height: 14px; }
.icon-btn.danger:hover { color: var(--red); border-color: var(--red); background: var(--red-dim); }

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); backdrop-filter: blur(4px); z-index: 1000; display: none; align-items: center; justify-content: center; padding: 20px; }
.modal-overlay.open { display: flex; }
.modal         { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); width: 100%; max-width: 800px; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow); }
.modal-lg      { max-width: 960px; }
.modal-header  { padding: 22px 24px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; background: var(--surface); z-index: 1; }
.modal-title   { font-family: var(--font-display); font-size: 1.2rem; }
.modal-close   { background: none; border: none; color: var(--text3); cursor: pointer; padding: 4px; border-radius: 6px; transition: .15s; display: flex; }
.modal-close:hover { color: var(--text); background: var(--surface2); }
.modal-body    { padding: 24px; }
.modal-footer  { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ── Invoice form ─────────────────────────────────────────── */
.section-title { font-size: .75rem; font-weight: 600; color: var(--text3); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.form-section  { margin-bottom: 24px; }
.items-table   { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.items-table th { font-size: .72rem; font-weight: 600; color: var(--text3); text-transform: uppercase; letter-spacing: .06em; padding: 6px 8px; text-align: left; }
.items-table td { padding: 4px 4px; }
.items-table .form-control { padding: 8px 10px; font-size: .85rem; }
.totals-box    { width: 280px; }
.total-row     { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; font-size: .875rem; }
.total-row.grand { border-top: 1px solid var(--border); margin-top: 6px; padding-top: 10px; font-weight: 600; font-size: 1rem; font-family: var(--font-mono); }
.total-label   { color: var(--text2); }
.total-val     { font-family: var(--font-mono); }

/* ── Filter tabs ──────────────────────────────────────────── */
.filter-tabs { display: flex; gap: 4px; background: var(--surface2); padding: 4px; border-radius: 8px; margin-bottom: 20px; width: fit-content; }
.filter-tab  { padding: 6px 14px; border-radius: 6px; font-size: .8rem; cursor: pointer; color: var(--text2); transition: .15s; border: none; background: none; }
.filter-tab.active { background: var(--surface); color: var(--text); font-weight: 500; }

/* ── Email editor ─────────────────────────────────────────── */
.quill-wrap    { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); }
.ql-toolbar.ql-snow  { border: none; border-bottom: 1px solid var(--border); background: var(--surface3); }
.ql-container.ql-snow { border: none; font-family: var(--font-body); color: var(--text); font-size: .875rem; min-height: 180px; }
.ql-editor     { min-height: 180px; }
.ql-snow .ql-stroke { stroke: var(--text2); }
.ql-snow .ql-fill   { fill: var(--text2); }
.ql-snow .ql-picker  { color: var(--text2); }
.var-chips     { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.var-chip      { background: var(--accent-glow); border: 1px solid rgba(99,102,241,.3); color: var(--accent2); padding: 3px 10px; border-radius: 100px; font-size: .75rem; cursor: pointer; font-family: var(--font-mono); transition: .15s; }
.var-chip:hover { background: var(--accent); color: #fff; }
.email-preview { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; font-size: .85rem; line-height: 1.7; min-height: 100px; }

/* ── Settings ─────────────────────────────────────────────── */
.settings-grid     { display: grid; grid-template-columns: 220px 1fr; gap: 24px; }
.settings-nav      { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 8px; height: fit-content; }
.settings-nav-item { padding: 9px 14px; border-radius: 8px; cursor: pointer; font-size: .875rem; color: var(--text2); transition: .15s; }
.settings-nav-item:hover  { color: var(--text); background: var(--surface2); }
.settings-nav-item.active { color: var(--accent2); background: var(--accent-glow); font-weight: 500; }
.settings-panel    { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; display: none; }
.settings-panel.active { display: block; }
.settings-title    { font-family: var(--font-display); font-size: 1.2rem; margin-bottom: 6px; }
.settings-sub      { color: var(--text3); font-size: .825rem; margin-bottom: 24px; }

/* ── Email log ────────────────────────────────────────────── */
.email-log-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 8px; display: flex; justify-content: space-between; align-items: center; }
.log-meta       { font-size: .78rem; color: var(--text3); margin-top: 2px; }

/* ── Empty state ──────────────────────────────────────────── */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text3); }
.empty-icon  { font-size: 3rem; margin-bottom: 12px; opacity: .3; }
.empty-title { font-size: 1rem; color: var(--text2); margin-bottom: 6px; }

/* ── Toast ────────────────────────────────────────────────── */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; pointer-events: none; }
.toast  { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 18px; font-size: .85rem; box-shadow: var(--shadow); pointer-events: all; animation: toastIn .2s ease; display: flex; align-items: center; gap: 10px; min-width: 260px; }
.toast.success { border-left: 3px solid var(--green); }
.toast.error   { border-left: 3px solid var(--red); }
.toast.info    { border-left: 3px solid var(--accent); }
@keyframes toastIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* ── Invoice preview (inside modal & PDF-ready area) ─────── */
.invoice-preview         { background: #fff; color: #1a1a2e; border-radius: var(--radius); padding: 48px; }
.inv-header              { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 40px; }
.inv-company             { font-size: 1.5rem; font-weight: 700; color: #1a1a2e; }
.inv-company-details     { font-size: .8rem; color: #555; margin-top: 4px; line-height: 1.7; }
.inv-badge               { background: #6366f1; color: #fff; font-size: .7rem; font-weight: 700; padding: 4px 12px; border-radius: 100px; letter-spacing: .08em; text-transform: uppercase; }
.inv-meta                { text-align: right; font-size: .85rem; color: #555; margin-top: 8px; }
.inv-meta strong         { color: #1a1a2e; }
.inv-number              { font-size: .75rem; color: #888; margin-bottom: 2px; }
.inv-parties             { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.inv-party-label         { font-size: .65rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: #888; margin-bottom: 6px; }
.inv-party-name          { font-weight: 600; font-size: .95rem; color: #1a1a2e; }
.inv-party-detail        { font-size: .82rem; color: #555; line-height: 1.6; }
.inv-table               { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
.inv-table th            { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: #888; border-bottom: 2px solid #e5e7eb; padding: 8px 12px; text-align: left; }
.inv-table td            { padding: 12px 12px; border-bottom: 1px solid #f3f4f6; font-size: .875rem; color: #374151; }
.inv-table tr:last-child td { border-bottom: none; }
.inv-totals              { display: flex; justify-content: flex-end; margin-bottom: 32px; }
.inv-totals-box          { width: 260px; }
.inv-total-row           { display: flex; justify-content: space-between; padding: 5px 0; font-size: .875rem; color: #555; }
.inv-total-row.grand     { border-top: 2px solid #1a1a2e; margin-top: 8px; padding-top: 10px; font-weight: 700; font-size: 1rem; color: #1a1a2e; }
.inv-bank                { background: #f8f9fa; border-radius: 8px; padding: 16px 20px; margin-bottom: 24px; }
.inv-bank-title          { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: #888; margin-bottom: 8px; }
.inv-bank-grid           { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 24px; }
.inv-bank-item           { font-size: .8rem; color: #555; }
.inv-bank-item strong    { color: #1a1a2e; }
.inv-footer              { text-align: center; font-size: .78rem; color: #999; border-top: 1px solid #e5e7eb; padding-top: 16px; }

/* ── Info box ─────────────────────────────────────────────── */
.info-box { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; font-size: .82rem; color: var(--text2); line-height: 1.8; }
.info-box strong { color: var(--text); display: block; margin-bottom: 8px; }

/* ── Loading spinner ──────────────────────────────────────── */
.spinner { width: 24px; height: 24px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .6s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-row td { text-align: center; padding: 40px; color: var(--text3); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .app-layout { grid-template-columns: 1fr; }
  .sidebar    { display: none; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .stats-grid  { grid-template-columns: 1fr; }
  .content-area { padding: 16px; }
  .form-row-2, .form-row-3 { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
}