/* ═══════════════════════════════════════════════════════════
   brain.sfer.ai — Editorial Business Theme
   ═══════════════════════════════════════════════════════════ */

:root {
  --brand: #2E86AB;
  --brand-dark: #1D5F7A;
  --brand-light: #E8F4F8;
  --brand-glow: rgba(46, 134, 171, 0.12);
  --revenue: #0D9668;
  --revenue-bg: #ECFDF5;
  --expense: #DC2626;
  --expense-bg: #FEF2F2;
  --profit: #F18F01;
  --profit-bg: #FFF7ED;
  --warning: #EAB308;
  --warning-bg: #FEFCE8;
  --neutral: #64748B;
  --bg: #F5F2EE;
  --bg-grain: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  --card: #FFFFFF;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
  --card-shadow-hover: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
  --text: #1A1A2E;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --sidebar-bg: #1A1A2E;
  --sidebar-text: #C5C7D0;
  --sidebar-active: var(--brand);
  --sidebar-hover: rgba(255,255,255,0.06);
  --sidebar-width: 260px;
  --border: #E5E1DC;
  --border-light: #F0EDE8;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: var(--bg-grain);
  background-repeat: repeat;
  pointer-events: none; z-index: 0;
}

.font-display { font-family: 'Playfair Display', Georgia, serif; }

/* ── Layout ───────────────────────────────────────────── */
.layout { display: flex; min-height: 100vh; position: relative; z-index: 1; }
.main-content {
  flex: 1; margin-left: var(--sidebar-width);
  padding: 2rem 2.5rem; max-width: 1400px;
  transition: margin-left var(--transition);
}

/* ── Sidebar ──────────────────────────────────────────── */
.sidebar {
  position: fixed; top: 0; left: 0;
  width: var(--sidebar-width); height: 100vh;
  background: var(--sidebar-bg);
  display: flex; flex-direction: column;
  z-index: 50; transition: transform var(--transition);
  overflow-y: auto;
}
.sidebar-logo { padding: 1.8rem 1.5rem 1.2rem; border-bottom: 1px solid rgba(255,255,255,0.06); }
.sidebar-logo h1 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.35rem; font-weight: 700; color: #FFF; letter-spacing: -0.01em;
}
.sidebar-logo .subtitle {
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--brand); margin-top: 0.25rem; font-weight: 500;
}
.sidebar-nav { padding: 1rem 0; flex: 1; }
.nav-section-label {
  font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: rgba(255,255,255,0.25); padding: 1.2rem 1.5rem 0.5rem; font-weight: 600;
}
.nav-item {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.65rem 1.5rem; color: var(--sidebar-text);
  text-decoration: none; font-size: 0.9rem; font-weight: 450;
  transition: all var(--transition);
  border-left: 3px solid transparent; margin: 1px 0;
}
.nav-item:hover { background: var(--sidebar-hover); color: #FFF; }
.nav-item.active {
  background: rgba(46,134,171,0.1); color: #FFF;
  border-left-color: var(--brand); font-weight: 600;
}
.nav-item svg { width: 18px; height: 18px; opacity: 0.6; flex-shrink: 0; }
.nav-item.active svg, .nav-item:hover svg { opacity: 1; }
.sidebar-footer { padding: 1rem 1.5rem; border-top: 1px solid rgba(255,255,255,0.06); }
.sidebar-footer a {
  display: flex; align-items: center; gap: 0.5rem;
  color: rgba(255,255,255,0.35); text-decoration: none;
  font-size: 0.8rem; transition: color var(--transition);
}
.sidebar-footer a:hover { color: rgba(255,255,255,0.7); }

.menu-toggle {
  display: none; position: fixed; top: 1rem; left: 1rem; z-index: 60;
  width: 40px; height: 40px; border-radius: 8px;
  background: var(--sidebar-bg); border: none; color: #FFF;
  cursor: pointer; align-items: center; justify-content: center;
}

/* ── Page Header ──────────────────────────────────────── */
.page-header { margin-bottom: 2rem; padding-bottom: 1.2rem; border-bottom: 2px solid var(--text); }
.page-header h2 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.8rem; font-weight: 800; letter-spacing: -0.02em;
}
.page-header .page-subtitle { font-size: 0.85rem; color: var(--text-secondary); margin-top: 0.3rem; }

/* ── Cards ────────────────────────────────────────────── */
.card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--card-shadow); padding: 1.5rem;
  transition: box-shadow var(--transition), transform var(--transition);
  border: 1px solid var(--border-light);
}
.card:hover { box-shadow: var(--card-shadow-hover); }

/* ── KPI Cards ────────────────────────────────────────── */
.kpi-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem; margin-bottom: 1.5rem;
}
.kpi-card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--card-shadow); padding: 1.25rem 1.5rem;
  border: 1px solid var(--border-light); position: relative; overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.kpi-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; }
.kpi-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-2px); }
.kpi-card--brand::before  { background: var(--brand); }
.kpi-card--green::before  { background: var(--revenue); }
.kpi-card--red::before    { background: var(--expense); }
.kpi-card--orange::before { background: var(--profit); }
.kpi-card--neutral::before { background: var(--neutral); }
.kpi-card--warning::before { background: var(--warning); }
.kpi-label {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-secondary); margin-bottom: 0.5rem;
}
.kpi-value {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.85rem; font-weight: 700; line-height: 1.1;
  letter-spacing: -0.02em; font-variant-numeric: tabular-nums;
}
.kpi-sub { font-size: 0.78rem; color: var(--text-secondary); margin-top: 0.35rem; }

/* ── Data Tables ──────────────────────────────────────── */
.data-table-wrapper {
  overflow-x: auto; border-radius: var(--radius);
  border: 1px solid var(--border-light);
}
.data-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; font-variant-numeric: tabular-nums; }
.data-table thead th {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-secondary);
  background: #FAFAF8; padding: 0.75rem 1rem; text-align: left;
  white-space: nowrap; border-bottom: 2px solid var(--border);
}
.data-table tbody td { padding: 0.65rem 1rem; border-bottom: 1px solid var(--border-light); }
.data-table tbody tr:hover td { background: rgba(46,134,171,0.03); }
.data-table tbody tr:last-child td { border-bottom: none; }

.amount-positive { color: var(--revenue); font-weight: 600; }
.amount-negative { color: var(--expense); font-weight: 600; }

/* ── Badges ───────────────────────────────────────────── */
.badge {
  display: inline-block; font-size: 0.7rem; font-weight: 600;
  padding: 0.15rem 0.5rem; border-radius: 3px; letter-spacing: 0.02em;
}
.badge-green  { background: var(--revenue-bg); color: var(--revenue); }
.badge-red    { background: var(--expense-bg); color: var(--expense); }
.badge-orange { background: var(--profit-bg);  color: var(--profit); }
.badge-blue   { background: var(--brand-light); color: var(--brand); }
.badge-gray   { background: #F3F4F6; color: var(--neutral); }
.badge-warning { background: var(--warning-bg); color: #A16207; }

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  font-family: 'DM Sans', sans-serif; font-size: 0.82rem; font-weight: 600;
  padding: 0.5rem 1.2rem; border: none; border-radius: var(--radius-sm);
  cursor: pointer; display: inline-flex; align-items: center; gap: 0.4rem;
  transition: all var(--transition); text-decoration: none;
}
.btn-brand { background: var(--brand); color: #FFF; }
.btn-brand:hover { background: var(--brand-dark); }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--card); color: var(--text); }
.btn-sm { font-size: 0.75rem; padding: 0.35rem 0.8rem; }
.btn-danger { background: var(--expense); color: #FFF; }
.btn-danger:hover { background: #B91C1C; }

/* ── Forms ────────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-label {
  display: block; font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--text-secondary); margin-bottom: 0.35rem;
}
.form-input, .form-select {
  width: 100%; font-family: 'DM Sans', sans-serif; font-size: 0.9rem;
  padding: 0.6rem 0.85rem; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); background: #FAFAF8; color: var(--text);
  transition: all var(--transition);
}
.form-input:focus, .form-select:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-glow); background: #FFF;
}
.form-input::placeholder { color: var(--text-muted); }
.form-select {
  appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236B7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.7rem center;
}
.form-input-sm { padding: 0.4rem 0.6rem; font-size: 0.82rem; }

/* ── Calculator Layout ────────────────────────────────── */
.calc-layout { display: grid; grid-template-columns: 1fr 380px; gap: 1.5rem; align-items: start; }
.calc-form { display: flex; flex-direction: column; gap: 1.5rem; }
.calc-summary {
  position: sticky; top: 2rem;
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--card-shadow); border: 1px solid var(--border-light);
  overflow: hidden;
}
.calc-summary-header {
  background: var(--sidebar-bg); color: #FFF;
  padding: 1rem 1.5rem; font-weight: 600;
}
.calc-summary-body { padding: 1.25rem 1.5rem; }
.calc-summary-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.5rem 0; font-size: 0.88rem;
}
.calc-summary-row.total {
  border-top: 2px solid var(--text); margin-top: 0.5rem; padding-top: 0.75rem;
  font-weight: 700; font-size: 1rem;
}
.calc-summary-row.highlight {
  background: var(--brand-light); margin: 0.5rem -1.5rem; padding: 0.75rem 1.5rem;
  font-weight: 700; font-size: 1.05rem; color: var(--brand-dark);
}
.calc-summary-divider { border-top: 1px solid var(--border-light); margin: 0.25rem 0; }
.calc-summary-label { color: var(--text-secondary); }
.calc-summary-value { font-weight: 600; font-variant-numeric: tabular-nums; }

/* ── Team allocation table ────────────────────────────── */
.alloc-table { width: 100%; border-collapse: collapse; }
.alloc-table th {
  font-size: 0.68rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text-secondary);
  padding: 0.5rem; text-align: left; border-bottom: 1px solid var(--border);
}
.alloc-table td { padding: 0.5rem; vertical-align: middle; }
.alloc-table .form-input { min-width: 60px; }
.alloc-table .remove-btn {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  padding: 0.25rem; border-radius: 4px; transition: all var(--transition);
}
.alloc-table .remove-btn:hover { color: var(--expense); background: var(--expense-bg); }

/* ── Alert/Warning ────────────────────────────────────── */
.alert {
  padding: 0.75rem 1rem; border-radius: var(--radius-sm);
  font-size: 0.85rem; font-weight: 500; display: flex; align-items: center; gap: 0.5rem;
}
.alert-warning { background: var(--warning-bg); color: #A16207; border: 1px solid #FDE68A; }
.alert-danger { background: var(--expense-bg); color: var(--expense); border: 1px solid #FECACA; }
.alert-success { background: var(--revenue-bg); color: var(--revenue); border: 1px solid #A7F3D0; }

/* ── Login ────────────────────────────────────────────── */
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; position: relative; z-index: 1; }
.login-card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0,0,0,0.08); padding: 2.5rem;
  width: 100%; max-width: 380px; border: 1px solid var(--border-light);
  animation: fadeSlideUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.login-card h1 { font-family: 'Playfair Display', Georgia, serif; font-size: 1.6rem; font-weight: 800; text-align: center; margin-bottom: 0.3rem; }
.login-card .login-subtitle { text-align: center; font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 2rem; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 500; }
.login-input { width: 100%; font-family: 'DM Sans', sans-serif; font-size: 0.95rem; padding: 0.75rem 1rem; border: 1.5px solid var(--border); border-radius: var(--radius-sm); background: #FAFAF8; color: var(--text); transition: all var(--transition); text-align: center; letter-spacing: 0.15em; }
.login-input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-glow); background: #FFF; }
.login-input::placeholder { letter-spacing: 0.02em; color: var(--text-muted); }
.login-btn { width: 100%; font-family: 'DM Sans', sans-serif; font-size: 0.9rem; font-weight: 600; padding: 0.75rem; border: none; border-radius: var(--radius-sm); background: var(--brand); color: #FFF; cursor: pointer; transition: all var(--transition); margin-top: 1rem; }
.login-btn:hover { background: var(--brand-dark); transform: translateY(-1px); }
.login-error { background: var(--expense-bg); color: var(--expense); font-size: 0.82rem; font-weight: 500; padding: 0.6rem 0.85rem; border-radius: var(--radius-sm); margin-bottom: 1rem; text-align: center; }
.login-divider { width: 40px; height: 3px; background: var(--brand); margin: 0 auto 1.5rem; border-radius: 2px; }

/* ── Animations ───────────────────────────────────────── */
@keyframes fadeSlideUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
.animate-in { opacity: 0; animation: fadeSlideUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards; }
.animate-in:nth-child(1) { animation-delay: 0.05s; }
.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.15s; }
.animate-in:nth-child(4) { animation-delay: 0.2s; }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 1024px) {
  .calc-layout { grid-template-columns: 1fr; }
  .calc-summary { position: static; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .menu-toggle { display: flex; }
  .main-content { margin-left: 0; padding: 1.25rem; padding-top: 4rem; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .kpi-value { font-size: 1.4rem; }
  .page-header h2 { font-size: 1.3rem; }
}
@media (max-width: 480px) { .kpi-grid { grid-template-columns: 1fr; } }

.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 40; backdrop-filter: blur(2px); }
.sidebar-overlay.active { display: block; }

/* ── Utility ──────────────────────────────────────────── */
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.gap-row { display: flex; gap: 1rem; align-items: end; flex-wrap: wrap; }

/* ── Charts Grid (Finance) ──────────────────────────────── */
.card-chart { padding: 1.5rem; min-height: 360px; }
.charts-grid { display: grid; gap: 1.5rem; margin-bottom: 1.5rem; }
.charts-grid--2 { grid-template-columns: 1fr 1fr; }
.charts-grid--3 { grid-template-columns: 2fr 1fr; }
.charts-grid--1 { grid-template-columns: 1fr; }
.chart-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.chart-subtitle {
  font-size: 0.75rem; color: var(--text-muted);
  margin-top: -0.6rem; margin-bottom: 1rem;
}
.chart-animate {
  opacity: 0;
  animation: fadeSlideUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: 0.3s;
}
.chart-animate:nth-child(2) { animation-delay: 0.4s; }
.chart-animate:nth-child(3) { animation-delay: 0.5s; }

/* ── Controls Bar (Finance) ─────────────────────────────── */
.controls-bar {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 1.5rem; flex-wrap: wrap;
}
.control-select {
  font-family: 'DM Sans', sans-serif; font-size: 0.85rem; font-weight: 500;
  padding: 0.5rem 2rem 0.5rem 0.85rem;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--card); color: var(--text); cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236B7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 0.7rem center;
  transition: border-color var(--transition);
}
.control-select:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-glow);
}

/* ── KPI Delta (Finance) ────────────────────────────────── */
.kpi-delta {
  display: inline-flex; align-items: center; gap: 0.25rem;
  margin-top: 0.5rem; font-size: 0.78rem; font-weight: 600;
  padding: 0.15rem 0.5rem; border-radius: 4px;
}
.kpi-delta--up { color: var(--revenue); background: var(--revenue-bg); }
.kpi-delta--down { color: var(--expense); background: var(--expense-bg); }

/* ── Text KPI sizes ─────────────────────────────────────── */
.text-kpi-sm {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.6rem; font-weight: 700; line-height: 1.15;
  letter-spacing: -0.01em;
}

/* ── Amount neutral ─────────────────────────────────────── */
.amount-neutral { color: var(--text); font-weight: 600; }

/* ── Validated Toggle (Finance) ─────────────────────────── */
.toggle-group {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.82rem; font-weight: 500;
  color: var(--text-secondary); user-select: none;
}
.toggle-switch { position: relative; width: 38px; height: 22px; flex-shrink: 0; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute; inset: 0; background: var(--border);
  border-radius: 11px; cursor: pointer; transition: background var(--transition);
}
.toggle-track::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; background: #FFF; border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15); transition: transform var(--transition);
}
.toggle-switch input:checked + .toggle-track { background: var(--brand); }
.toggle-switch input:checked + .toggle-track::after { transform: translateX(16px); }
.toggle-label-active { color: var(--text); font-weight: 600; }

/* ── Refresh & Spinner (Finance) ────────────────────────── */
.refresh-btn { margin-left: auto; }
.refresh-btn svg { transition: transform 0.4s ease; }
.refresh-btn.spinning svg { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 1024px) {
  .charts-grid--2, .charts-grid--3 { grid-template-columns: 1fr; }
}