/* ═══════════════════════════════════════════════════════
   KliaBill — app.css FINAL v4
   Fixes: full-width on large monitors, mobile sidebar,
          theme toggle, accent colour propagation
   ═══════════════════════════════════════════════════════ */

/* ── Variables ───────────────────────────────────────── */
:root {
  --bg:        #0f172a;
  --surface:   #1e293b;
  --surface2:  #263347;
  --border:    #334155;
  --text:      #f1f5f9;
  --text2:     #cbd5e1;
  --text3:     #94a3b8;
  --muted:     #64748b;
  --accent:    #e63946;
  --accent-bg: rgba(230, 57, 70, .12);
  --green:     #4ade80;
  --amber:     #f59e0b;
  --blue:      #60a5fa;
  --red:       #f87171;
  --navy:      #0f172a;
  --sidebar-w: 220px;
  --radius:    10px;
  --shadow:    0 4px 24px rgba(0,0,0,.3);
}

[data-theme="light"] {
  --bg:        #f1f5f9;
  --surface:   #ffffff;
  --surface2:  #f8fafc;
  --border:    #e2e8f0;
  --text:      #0f172a;
  --text2:     #334155;
  --text3:     #64748b;
  --muted:     #94a3b8;
  --navy:      #1e293b;
  --shadow:    0 4px 24px rgba(0,0,0,.08);
}

/* ── Reset ───────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  width: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  transition: background .2s, color .2s;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

/* ── Shell — fills entire viewport ──────────────────── */
.shell {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* ── Sidebar ─────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--navy);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
  overflow-y: auto;
  transition: transform .3s ease;
  flex-shrink: 0;
}

.sidebar-logo {
  padding: 24px 20px 8px;
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
}
.sidebar-logo span { color: var(--accent); }

.company-name {
  padding: 4px 20px 14px;
  font-size: 11px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-nav { flex: 1; padding: 10px 0; }

.nav-section-label {
  padding: 12px 20px 4px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  font-weight: 700;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text3);
  transition: all .15s;
  cursor: pointer;
  position: relative;
  text-decoration: none;
  border-right: 2px solid transparent;
}
.nav-item svg {
  width: 17px; height: 17px;
  fill: none; stroke: currentColor; stroke-width: 2;
  flex-shrink: 0;
}
.nav-item:hover { color: var(--text); background: var(--surface); }
.nav-item.active {
  color: var(--accent);
  background: var(--accent-bg);
  border-right-color: var(--accent);
}

.nav-badge {
  margin-left: auto;
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}

.sidebar-footer { border-top: 1px solid var(--border); padding: 8px 0; }
.logout { color: var(--text3); }
.logout:hover { color: var(--red); }

/* ── Theme toggle pill ───────────────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 11px 20px;
  cursor: pointer;
  color: var(--text3);
  font-size: 13px;
  font-weight: 500;
  transition: color .15s;
  user-select: none;
}
.theme-toggle:hover { color: var(--text); }

.toggle-pill {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  transition: background .25s;
  flex-shrink: 0;
}
.toggle-pill::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  transition: transform .25s;
  box-shadow: 0 1px 4px rgba(0,0,0,.25);
}
[data-theme="light"] .toggle-pill { background: var(--accent); }
[data-theme="light"] .toggle-pill::after { transform: translateX(20px); }

/* ── Mobile hamburger ────────────────────────────────── */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,.4);
}
.sidebar-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all .25s;
}

.sidebar-overlay-bg {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 90;
  cursor: pointer;
}

/* ── Main — fills rest of screen ────────────────────── */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;           /* critical: allows flex child to shrink */
  width: calc(100% - var(--sidebar-w));
  display: flex;
  flex-direction: column;
}

/* ── Content ─────────────────────────────────────────── */
.content {
  flex: 1;
  padding: 30px 36px;
  width: 100%;
  /* NO max-width — let it fill the screen */
}

/* ── Page header ─────────────────────────────────────── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 26px;
  flex-wrap: wrap;
  gap: 12px;
}
.page-title { font-size: 22px; font-weight: 700; color: var(--text); }
.page-sub   { font-size: 13px; color: var(--muted); margin-top: 2px; }

/* ── Buttons (ALL use --accent) ──────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .15s;
  text-decoration: none;
  white-space: nowrap;
  font-family: inherit;
}
.btn-primary  { background: var(--accent); color: #fff; }
.btn-primary:hover  { filter: brightness(.88); }
.btn-secondary { background: var(--surface); color: var(--text2); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--surface2); color: var(--text); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); background: var(--surface); }
.btn-danger { background: #7f1d1d; color: #fca5a5; border: 1px solid #991b1b; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ── Cards ───────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
}
.card-header {
  padding: 15px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── Stats grid ──────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.stat-label { font-size: 10px; text-transform: uppercase; letter-spacing: .8px; color: var(--muted); font-weight: 600; margin-bottom: 8px; }
.stat-value { font-size: 22px; font-weight: 800; color: var(--text); }
.stat-sub   { font-size: 11px; color: var(--muted); margin-top: 4px; }
.stat-red   { color: var(--red);   }
.stat-green { color: var(--green); }
.stat-amber { color: var(--amber); }
.stat-blue  { color: var(--blue);  }

/* ── Tables ──────────────────────────────────────────── */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table thead tr { background: var(--navy); }
.table thead th {
  padding: 11px 16px;
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}
.table tbody tr { border-bottom: 1px solid var(--border); transition: background .1s; }
.table tbody tr:hover { background: var(--surface2); }
.table tbody td { padding: 12px 16px; color: var(--text2); }
.table tfoot td {
  padding: 12px 16px;
  background: var(--surface2);
  font-weight: 700;
  color: var(--text);
  border-top: 2px solid var(--border);
}
.actions-cell { white-space: nowrap; }

/* ── Badges ──────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .3px;
}
.badge-paid      { background: #14532d; color: #4ade80; }
.badge-draft     { background: var(--surface2); color: var(--muted); border: 1px solid var(--border); }
.badge-sent      { background: #1e3a5f; color: #60a5fa; }
.badge-overdue   { background: #7f1d1d; color: #f87171; }
.badge-cancelled { background: #1c1917; color: #78716c; }

/* ── Forms ───────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 6px;
}
.form-input, .form-select {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  width: 100%;
  transition: border-color .15s;
  font-family: inherit;
}
.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent);
}
.form-select { appearance: none; -webkit-appearance: none; cursor: pointer; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-hint { font-size: 11px; color: var(--muted); margin-top: 4px; }
textarea.form-input { resize: vertical; }

/* ── Alerts ──────────────────────────────────────────── */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #14532d; color: #4ade80; border: 1px solid #166534; }
.alert-error   { background: #7f1d1d; color: #fca5a5; border: 1px solid #991b1b; }

/* ── Modal ───────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 28px;
  box-shadow: var(--shadow);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.modal-header h2 { margin: 0; font-size: 18px; color: var(--text); }
.modal-close {
  background: none; border: none;
  font-size: 24px; color: var(--muted);
  cursor: pointer; line-height: 1; padding: 0;
}
.modal-close:hover { color: var(--accent); }
.modal-footer { display: flex; gap: 10px; margin-top: 20px; }

/* ── Icon buttons ────────────────────────────────────── */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  text-decoration: none;
  transition: all .15s;
}
.icon-btn:hover { color: var(--text); background: var(--surface2); }
.icon-btn.icon-danger:hover { color: var(--red); border-color: #7f1d1d; background: #1c0a0a; }

.link { color: var(--accent); text-decoration: none; }
.link:hover { text-decoration: underline; }

.empty-state { padding: 56px 24px; text-align: center; color: var(--muted); }
.empty-state p { font-size: 15px; }

/* ── Invoice edit 2-col ──────────────────────────────── */
.ie-wrap {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  align-items: start;
}

/* ── Reports ─────────────────────────────────────────── */
.rpt-g2  { display: grid; grid-template-columns: 1fr 1fr;   gap: 18px; margin-bottom: 18px; }
.rpt-g32 { display: grid; grid-template-columns: 2fr 1fr;   gap: 18px; margin-bottom: 18px; }

/* ════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════ */

/* Large — let it breathe but don't cap */
@media (min-width: 1400px) {
  .content { padding: 32px 48px; }
}

/* Medium — adjust grids */
@media (max-width: 1200px) {
  .content { padding: 28px 28px; }
}

@media (max-width: 1024px) {
  .content { padding: 24px 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .ie-wrap { grid-template-columns: 270px 1fr; }
}

/* ── MOBILE ─────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Show hamburger */
  .sidebar-toggle { display: flex; }

  /* Sidebar becomes off-canvas drawer */
  .sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }
  .sidebar.is-open {
    transform: translateX(0);
    box-shadow: 4px 0 32px rgba(0,0,0,.5);
  }
  .sidebar-overlay-bg.is-open { display: block; }

  /* Main fills full width */
  .main {
    margin-left: 0 !important;
    width: 100% !important;
  }
  .content { padding: 62px 16px 28px; }

  /* Stack page header */
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .page-header > *:last-child {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    width: 100%;
  }

  /* Collapse grids */
  .stats-grid,
  .form-row,
  .ie-wrap,
  .rpt-g2,
  .rpt-g32,
  .settings-grid,
  .reports-grid { grid-template-columns: 1fr !important; }

  /* Modal as bottom sheet */
  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }
  .modal {
    border-radius: 16px 16px 0 0 !important;
    max-width: 100% !important;
    max-height: 88vh;
    padding: 24px 20px;
  }

  /* Tab bars — horizontal scroll */
  .inv-tabs,
  .rpt-tabs,
  .settings-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 1px;
  }
  .inv-tabs::-webkit-scrollbar,
  .rpt-tabs::-webkit-scrollbar,
  .settings-tabs::-webkit-scrollbar { display: none; }
  .inv-tab, .rpt-tab, .settings-tab { flex-shrink: 0; }

  /* Tables scroll */
  .table { min-width: 520px; }

  /* Sidebar invoice view stacks */
  .inv-view-wrap { grid-template-columns: 1fr !important; }
  .inv-sidebar { order: -1; }
}

/* Small mobile */
@media (max-width: 480px) {
  .content { padding: 60px 12px 20px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-value { font-size: 18px; }
  .page-title { font-size: 19px; }
  .btn { padding: 8px 14px; }

  /* KPI cards that appear on invoices/expenses pages */
  .inv-kpi-row,
  .exp-kpi-row,
  .rpt-kpi { grid-template-columns: 1fr 1fr !important; gap: 10px; }
}