/* =========================================================
   DashboardMF — Design System
   Dark theme premium, Mobile-first, PWA-ready
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---- CSS Variables ---- */
:root {
  --bg-base:       #0f1117;
  --bg-surface:    #1a1d27;
  --bg-elevated:   #232736;
  --bg-hover:      #2a2f45;

  --accent:        #6c63ff;
  --accent-light:  #8b85ff;
  --accent-dim:    rgba(108, 99, 255, 0.15);

  --success:       #22c55e;
  --success-dim:   rgba(34, 197, 94, 0.12);
  --warning:       #f59e0b;
  --warning-dim:   rgba(245, 158, 11, 0.12);
  --danger:        #ef4444;
  --danger-dim:    rgba(239, 68, 68, 0.12);
  --info:          #38bdf8;
  --info-dim:      rgba(56, 189, 248, 0.12);

  --text-primary:  #f1f5f9;
  --text-muted:    #94a3b8;
  --text-faint:    #475569;
  --border:        rgba(255,255,255,0.07);
  --border-strong: rgba(255,255,255,0.12);

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-xl:  24px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 20px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.6);

  --sidebar-w:  240px;
  --topbar-h:   60px;
  --transition: 0.2s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--accent-light); text-decoration: none; }
a:hover { color: var(--accent); }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font-family: inherit; }

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

/* =============================================
   SIDEBAR
   ============================================= */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  transition: transform var(--transition);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 20px;
  border-bottom: 1px solid var(--border);
  min-height: var(--topbar-h);
}
.sidebar-logo .logo-icon {
  width: 34px; height: 34px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: #fff;
  flex-shrink: 0;
}
.sidebar-logo .logo-text {
  font-size: 15px; font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}
.sidebar-logo .logo-sub {
  font-size: 10px; color: var(--text-muted); font-weight: 400;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 10px;
  overflow-y: auto;
}
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }

.nav-section-label {
  font-size: 10px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-faint);
  padding: 12px 10px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 2px;
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.nav-item.active {
  background: var(--accent-dim);
  color: var(--accent-light);
  font-weight: 600;
}
.nav-item.active svg { stroke: var(--accent-light); }

/* Grupo de nav com submenu colapsável */
.nav-group-toggle {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
}
.nav-submenu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.nav-group.open .nav-submenu {
  max-height: 300px;
}
.nav-group.open .nav-chevron {
  transform: rotate(90deg);
}
.nav-subitem {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px 8px 34px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 2px;
  text-decoration: none;
}
.nav-subitem:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.nav-subitem.active {
  background: var(--accent-dim);
  color: var(--accent-light);
  font-weight: 600;
}

.sidebar-footer {
  padding: 14px 10px;
  border-top: 1px solid var(--border);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
}
.sidebar-user:hover { background: var(--bg-hover); }
.user-avatar {
  width: 32px; height: 32px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  color: var(--accent-light);
  flex-shrink: 0;
}
.user-info { flex: 1; min-width: 0; }
.user-name { font-size: 13px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 11px; color: var(--text-muted); }

/* =============================================
   TOPBAR (mobile)
   ============================================= */
.topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 300;
}
.topbar-logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 700; color: var(--text-primary);
}
.topbar-logo .logo-icon { width: 28px; height: 28px; background: var(--accent); border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 800; color: #fff; }

.menu-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  display: flex;
}
.menu-toggle:hover { background: var(--bg-hover); }

/* =============================================
   MAIN CONTENT
   ============================================= */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-header {
  padding: 32px 32px 0;
}
.page-title {
  font-size: 22px; font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.4px;
}
.page-subtitle {
  font-size: 13px; color: var(--text-muted);
  margin-top: 4px;
}

.page-body {
  padding: 24px 32px 40px;
  flex: 1;
}

/* =============================================
   KPI CARDS
   ============================================= */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.kpi-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.kpi-card.accent::before   { background: var(--accent); }
.kpi-card.success::before  { background: var(--success); }
.kpi-card.warning::before  { background: var(--warning); }
.kpi-card.danger::before   { background: var(--danger); }
.kpi-card.info::before     { background: var(--info); }

.kpi-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.kpi-label {
  font-size: 12px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}
.kpi-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}
.kpi-icon.accent  { background: var(--accent-dim); color: var(--accent-light); }
.kpi-icon.success { background: var(--success-dim); color: var(--success); }
.kpi-icon.warning { background: var(--warning-dim); color: var(--warning); }
.kpi-icon.danger  { background: var(--danger-dim); color: var(--danger); }
.kpi-icon.info    { background: var(--info-dim); color: var(--info); }

.kpi-value {
  font-size: 26px; font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.8px;
  line-height: 1;
}
.kpi-value.loading {
  background: var(--bg-elevated);
  border-radius: 4px;
  color: transparent;
  animation: skeleton 1.2s ease infinite;
  min-width: 120px; height: 32px;
}
.kpi-meta {
  font-size: 12px; color: var(--text-muted);
}

@keyframes skeleton {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* =============================================
   SECTION CARD (for tables)
   ============================================= */
.section-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.section-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}
.section-card-title {
  font-size: 15px; font-weight: 600;
  color: var(--text-primary);
  display: flex; align-items: center; gap: 8px;
}
.section-card-title svg { color: var(--text-muted); }

.section-card-tools {
  display: flex; align-items: center; gap: 8px;
  flex-wrap: wrap;
}

/* =============================================
   SEARCH BOX
   ============================================= */
.search-box {
  position: relative;
}
.search-box svg {
  position: absolute;
  left: 10px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--text-muted);
  pointer-events: none;
}
.search-input {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  padding: 8px 12px 8px 34px;
  width: 260px;
  transition: border-color var(--transition), width var(--transition);
  outline: none;
}
.search-input::placeholder { color: var(--text-faint); }
.search-input:focus {
  border-color: var(--accent);
  width: 320px;
}

/* =============================================
   TABLE
   ============================================= */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
}
thead th {
  background: var(--bg-elevated);
  padding: 11px 16px;
  text-align: left;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  white-space: nowrap;
  position: sticky; top: 0;
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 13px 16px;
  font-size: 13.5px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background var(--transition); }
tbody tr:hover { background: var(--bg-hover); }

.td-desc {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
}
.td-code { font-family: 'Courier New', monospace; font-size: 12px; color: var(--text-muted); }

/* Stock badges */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px; border-radius: 20px;
  font-size: 11px; font-weight: 600;
}
.badge-ok      { background: var(--success-dim); color: var(--success); }
.badge-warn    { background: var(--warning-dim); color: var(--warning); }
.badge-danger  { background: var(--danger-dim);  color: var(--danger); }

/* =============================================
   PAGINATION
   ============================================= */
.pagination {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap; gap: 10px;
}
.pagination-info { font-size: 12px; color: var(--text-muted); }
.pagination-controls { display: flex; gap: 4px; }
.page-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px; font-weight: 500;
  padding: 6px 12px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.page-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.page-btn.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent-light); }
.page-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* =============================================
   EMPTY STATE
   ============================================= */
.empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 60px 20px; gap: 12px;
  color: var(--text-muted);
}
.empty-state svg { width: 48px; height: 48px; opacity: 0.35; }
.empty-state p { font-size: 14px; text-align: center; }

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600;
  border: none; cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-light); color: #fff; }
.btn-ghost {
  background: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); }
.btn-icon {
  padding: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-icon:hover { color: var(--text-primary); border-color: var(--border-strong); }

/* =============================================
   AUTH PAGES
   ============================================= */
.auth-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: var(--bg-base);
}
.auth-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  width: 100%; max-width: 420px;
  box-shadow: var(--shadow-lg);
}
.auth-logo {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 28px;
}
.auth-logo .logo-icon {
  width: 38px; height: 38px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800; color: #fff;
}
.auth-logo .logo-text { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.auth-card h2 { font-size: 20px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.auth-card .subtitle { font-size: 13px; color: var(--text-muted); margin-bottom: 28px; }

.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.4px; }
.form-control {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  padding: 10px 14px;
  transition: border-color var(--transition);
  outline: none;
}
.form-control:focus { border-color: var(--accent); }
.form-control::placeholder { color: var(--text-faint); }

.btn-full { width: 100%; justify-content: center; padding: 11px; }
.text-center { text-align: center; }
.text-sm { font-size: 12px; }
.mt-3 { margin-top: 16px; }
.link { color: var(--accent-light); }
.link:hover { color: var(--accent); }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* =============================================
   FLASH MESSAGES
   ============================================= */
.flash-container {
  position: fixed;
  bottom: 20px; right: 20px;
  z-index: 9999;
  display: flex; flex-direction: column; gap: 10px;
  max-width: 360px;
}
.flash {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 13px; font-weight: 500;
  display: flex; align-items: center; gap: 10px;
  border: 1px solid;
  box-shadow: var(--shadow-md);
  animation: slideIn 0.3s ease;
}
.flash-success { background: var(--success-dim); border-color: var(--success); color: var(--success); }
.flash-error   { background: var(--danger-dim);  border-color: var(--danger);  color: var(--danger); }
.flash-info    { background: var(--info-dim);    border-color: var(--info);    color: var(--info); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);   opacity: 1; }
}

/* =============================================
   OVERLAY (mobile sidebar)
   ============================================= */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 150;
  backdrop-filter: blur(2px);
}
.sidebar-overlay.active { display: block; }

/* =============================================
   RESPONSIVE — Mobile
   ============================================= */
@media (max-width: 768px) {
  .topbar { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    top: 0;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }

  .main-content {
    margin-left: 0;
    padding-top: var(--topbar-h);
    min-width: 0; /* Prevents flex item from stretching page width */
  }

  .page-header { padding: 20px 16px 0; }
  .page-body   { padding: 16px 16px 32px; }

  .kpi-grid { grid-template-columns: 1fr; gap: 12px; }
  .kpi-value { font-size: 20px; }

  .search-input { width: 100% !important; }
  .section-card-header { flex-direction: column; align-items: flex-start; }
  .section-card-tools { width: 100%; }
  .search-box { width: 100%; }
  .search-input { width: 100%; }

  .auth-card { padding: 28px 20px; }
}

@media (max-width: 480px) {
  .kpi-value { font-size: 18px; }
  .kpi-icon { display: none; }
}