/* ============================================================
   PI Manager - Main Stylesheet
   Aesthetic: Refined professional with warm accents
   ============================================================ */

:root {
  --bg:           #f5f4f0;
  --surface:      #ffffff;
  --surface-2:    #faf9f6;
  --border:       #e4e0d8;
  --border-soft:  #ede9e0;
  --text:         #1a1714;
  --text-2:       #5c5751;
  --text-3:       #9b958c;
  --accent:       #c45e2a;
  --accent-light: #f5e6dd;
  --accent-hover: #a84d21;
  --sidebar-bg:   #1a1714;
  --sidebar-text: #c9c3bb;
  --sidebar-active: #c45e2a;
  --sidebar-w:    240px;
  --topbar-h:     64px;
  --radius:       10px;
  --radius-sm:    6px;
  --shadow:       0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.05);
  --shadow-md:    0 4px 16px rgba(0,0,0,.1);
  --font-body:    'DM Sans', sans-serif;
  --font-display: 'DM Serif Display', serif;
  --status-draft:     #6b7280;
  --status-final:     #2563eb;
  --status-sent:      #7c3aed;
  --status-paid:      #16a34a;
  --status-cancelled: #dc2626;
}

*, *::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);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- App Shell ---- */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0; top: 0; bottom: 0;
  z-index: 100;
  transition: transform .3s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.brand-mark {
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 20px;
  color: #fff;
  flex-shrink: 0;
}

.brand-name {
  display: block;
  color: #fff;
  font-weight: 600;
  font-size: .95rem;
  line-height: 1.2;
}

.brand-sub {
  display: block;
  color: var(--sidebar-text);
  font-size: .72rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 10px;
}

.nav-section-label {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.3);
  padding: 14px 8px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 400;
  transition: all .15s;
  margin-bottom: 2px;
}

.nav-item svg {
  width: 16px; height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  flex-shrink: 0;
}

.nav-item:hover {
  background: rgba(255,255,255,.06);
  color: #fff;
}

.nav-item.active {
  background: var(--accent);
  color: #fff;
  font-weight: 500;
}

.sidebar-footer {
  padding: 14px 12px;
  border-top: 1px solid rgba(255,255,255,.07);
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-chip { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; }

.user-avatar {
  width: 30px; height: 30px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: .75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.user-info { min-width: 0; }
.user-name {
  display: block;
  color: #fff;
  font-size: .8rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-role {
  display: block;
  color: var(--sidebar-text);
  font-size: .68rem;
  text-transform: capitalize;
}

.logout-btn {
  color: var(--sidebar-text);
  display: flex;
  align-items: center;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: color .15s;
  flex-shrink: 0;
}
.logout-btn:hover { color: #fff; }
.logout-btn svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 1.8; }

/* ---- Main Area ---- */
.main-area {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---- Topbar ---- */
.topbar {
  height: var(--topbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--text-2);
}
.menu-toggle svg { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 2; }

.page-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: normal;
  color: var(--text);
  flex: 1;
}

.topbar-actions { display: flex; align-items: center; gap: 8px; }

/* ---- Content ---- */
.content {
  flex: 1;
  padding: 24px;
  max-width: 1200px;
  width: 100%;
}

/* ---- Flash ---- */
.flash {
  margin: 0 24px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: .875rem;
  font-weight: 500;
  margin-top: 8px;
}
.flash button {
  background: none; border: none; cursor: pointer;
  font-size: 1.1rem; line-height: 1; opacity: .6;
}
.flash-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.flash-error   { background: #fee2e2; color: #dc2626; border: 1px solid #fca5a5; }
.flash-info    { background: #dbeafe; color: #1d4ed8; border: 1px solid #bfdbfe; }
.flash-warning { background: #fef9c3; color: #854d0e; border: 1px solid #fde047; }

/* ---- Cards ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: normal;
}

.card-body { padding: 20px; }

/* ---- Stat Cards ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 8px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--text);
  line-height: 1;
}

.stat-sub {
  font-size: .78rem;
  color: var(--text-3);
  margin-top: 4px;
}

.stat-card.accent { border-left: 3px solid var(--accent); }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

.data-table thead th {
  text-align: left;
  padding: 10px 14px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-3);
  border-bottom: 2px solid var(--border);
  background: var(--surface-2);
  white-space: nowrap;
}

.data-table tbody td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
}

.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--surface-2); }

.data-table .text-right { text-align: right; }
.data-table .text-center { text-align: center; }

/* ---- Status Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: .71rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.badge-draft     { background: #f1f3f5; color: var(--status-draft); }
.badge-final     { background: #dbeafe; color: var(--status-final); }
.badge-sent      { background: #ede9fe; color: var(--status-sent); }
.badge-paid      { background: #dcfce7; color: var(--status-paid); }
.badge-cancelled { background: #fee2e2; color: var(--status-cancelled); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all .15s;
  white-space: nowrap;
}

.btn svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 2; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: var(--surface);
  color: var(--text-2);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface-2); color: var(--text); }

.btn-danger {
  background: #fee2e2;
  color: #dc2626;
  border: 1px solid #fca5a5;
}
.btn-danger:hover { background: #fecaca; }

.btn-sm { padding: 5px 10px; font-size: .8rem; }
.btn-icon {
  padding: 6px;
  background: none;
  border: 1px solid transparent;
  color: var(--text-3);
}
.btn-icon:hover { background: var(--surface-2); border-color: var(--border); color: var(--text); }

/* ---- Forms ---- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group.full { grid-column: 1 / -1; }

label {
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-2);
}

input[type=text], input[type=email], input[type=password],
input[type=number], input[type=date], select, textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: .875rem;
  color: var(--text);
  background: var(--surface);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(196,94,42,.12);
}

textarea { resize: vertical; min-height: 80px; }
select { cursor: pointer; }

.form-hint {
  font-size: .75rem;
  color: var(--text-3);
}

/* ---- Line Items Table ---- */
.items-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

.items-table th {
  text-align: left;
  padding: 8px 10px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.items-table td {
  padding: 8px 6px;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
}

.items-table input { padding: 6px 8px; }
.items-table .text-right { text-align: right; }

.add-item-row { padding: 10px 0; }

/* ---- Invoice Summary ---- */
.invoice-summary {
  margin-left: auto;
  max-width: 340px;
  margin-top: 16px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: .875rem;
  border-bottom: 1px solid var(--border-soft);
}

.summary-row:last-child { border-bottom: none; }
.summary-row.total {
  font-weight: 600;
  font-size: 1rem;
  border-top: 2px solid var(--border);
  padding-top: 10px;
  margin-top: 4px;
}

/* ---- Search / Filter Bar ---- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.filter-bar input, .filter-bar select {
  width: auto;
  min-width: 180px;
}

.search-input-wrap {
  position: relative;
  flex: 1;
  max-width: 320px;
}
.search-input-wrap svg {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px; height: 15px;
  stroke: var(--text-3);
  fill: none;
  stroke-width: 2;
  pointer-events: none;
}
.search-input-wrap input { padding-left: 32px; }

/* ---- Empty State ---- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}
.empty-state-icon {
  width: 56px; height: 56px;
  background: var(--accent-light);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
}
.empty-state-icon svg { width: 28px; height: 28px; stroke: var(--accent); fill: none; stroke-width: 1.5; }
.empty-state h3 { font-family: var(--font-display); font-weight: normal; font-size: 1.2rem; margin-bottom: 6px; }
.empty-state p { color: var(--text-3); font-size: .875rem; }

/* ---- Pagination ---- */
.pagination {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-top: 16px;
  justify-content: center;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  text-decoration: none;
  cursor: pointer;
  transition: all .15s;
}
.page-btn:hover { border-color: var(--accent); color: var(--accent); }
.page-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.page-btn:disabled { opacity: .4; pointer-events: none; }

/* ---- Dashboard Activity ---- */
.activity-list { list-style: none; }
.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-soft);
}
.activity-item:last-child { border-bottom: none; }
.activity-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  flex-shrink: 0;
}
.activity-text { font-size: .875rem; }
.activity-time { font-size: .75rem; color: var(--text-3); margin-top: 2px; }

/* ---- Print Invoice ---- */
@media print {
  .sidebar, .topbar, .no-print { display: none !important; }
  .main-area { margin-left: 0 !important; }
  .content { padding: 0 !important; max-width: 100% !important; }
  .card { box-shadow: none !important; border: none !important; }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-area {
    margin-left: 0;
  }
  .menu-toggle { display: flex; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .filter-bar input, .filter-bar select { min-width: 0; width: 100%; }
}

/* ---- Misc ---- */
.text-muted { color: var(--text-3); }
.text-accent { color: var(--accent); }
.fw-medium { font-weight: 500; }
.fw-bold { font-weight: 600; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.justify-between { justify-content: space-between; }
.w-full { width: 100%; }

/* ---- Login Page ---- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sidebar-bg);
  padding: 20px;
}

.login-card {
  background: var(--surface);
  border-radius: 14px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 8px 40px rgba(0,0,0,.3);
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.login-logo .brand-mark {
  width: 44px; height: 44px;
  font-size: 24px;
}

.login-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.login-sub {
  color: var(--text-3);
  font-size: .85rem;
  margin-bottom: 24px;
}

/* ---- Invoice Print View ---- */
.invoice-print {
  background: #fff;
  max-width: 860px;
  margin: 0 auto;
  padding: 0;
  font-size: 13px;
}

.inv-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  padding: 24px 28px 16px;
  border-bottom: 3px solid var(--accent);
}

.inv-company-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 4px;
}

.inv-watermark {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--accent);
  letter-spacing: .06em;
  text-align: right;
  opacity: .85;
}

.inv-section {
  padding: 14px 28px;
  border-bottom: 1px solid #e5e5e5;
}

.inv-grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.inv-label {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 4px;
}

.inv-value { font-size: .9rem; color: var(--text); }

.inv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .85rem;
}

.inv-table th {
  background: #f7f4ef;
  padding: 8px 10px;
  text-align: left;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-3);
  border-bottom: 2px solid #e2ddd5;
}

.inv-table td {
  padding: 9px 10px;
  border-bottom: 1px solid #eeebe4;
  vertical-align: top;
}

.inv-table .text-right { text-align: right; }

.inv-totals {
  padding: 14px 28px;
  display: flex;
  justify-content: flex-end;
}

.inv-totals-inner { min-width: 280px; }
.inv-total-row { display: flex; justify-content: space-between; padding: 4px 0; font-size: .875rem; }
.inv-total-row.grand { font-weight: 700; font-size: 1rem; border-top: 2px solid var(--accent); margin-top: 6px; padding-top: 8px; color: var(--accent); }

.inv-words { font-size: .8rem; font-style: italic; color: var(--text-3); padding: 10px 28px; border-top: 1px solid #e5e5e5; }
.inv-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 16px 28px;
  border-top: 1px solid #e5e5e5;
  font-size: .8rem;
}

.inv-sign {
  text-align: right;
}

.inv-sign-line {
  border-top: 1px solid var(--text);
  display: inline-block;
  width: 160px;
  margin-top: 40px;
  padding-top: 4px;
  text-align: center;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-2);
}