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

:root {
  --sidebar-width: 240px;
  --sidebar-collapsed: 0px;
  --primary:   #2563eb;
  --primary-dark: #1e40af;
  --sidebar-bg: #1e293b;
  --sidebar-text: #cbd5e1;
  --sidebar-hover: #334155;
  --sidebar-active: #2563eb;
  --topbar-bg: #ffffff;
  --topbar-border: #e2e8f0;
  --body-bg: #f1f5f9;
  --text-main: #0f172a;
  --transition: 0.3s ease;
  --content-bg: #ffffff;
}

/* ========== Dark Mode ========== */
[data-theme="dark"] {
  --topbar-bg: #1e293b;
  --topbar-border: #334155;
  --body-bg: #0f172a;
  --content-bg: #1e293b;
  --text-main: #f1f5f9;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--body-bg);
  color: var(--text-main);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* ========== Layout ========== */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ========== Sidebar ========== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 200;
  transition: transform var(--transition);
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 16px;
  border-bottom: 1px solid #334155;
  min-height: 64px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: #f8fafc;
  text-shadow: 0 1px 0 #000, 0 0 1px #000;
  white-space: nowrap;
}

.logo-icon-img {
  width: 18px;
  height: 18px;
  object-fit: contain;
  filter: grayscale(1) brightness(0.15) contrast(2);
}

[data-theme="dark"] .logo-icon-img {
  filter: grayscale(1) brightness(1.9) contrast(2);
}

.logo-icon-fallback {
  line-height: 1;
}

/* Ícones em preto no modo claro e branco no modo dark */
.menu-item .icon {
  display: none;
  align-items: center;
  justify-content: center;
  width: 0;
  min-width: 0;
  height: 0;
  flex-shrink: 0;
  font-size: 1.15rem;
}

.menu-item .icon-img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  filter: grayscale(1) brightness(0.18) contrast(2);
}

.menu-item .icon-fallback {
  color: #222;
  text-shadow: 0 1px 0 #000, 0 0 1px #000;
}

[data-theme="dark"] .menu-item .icon,
[data-theme="dark"] .submenu-item .icon {
  color: #fff;
}

[data-theme="dark"] .menu-item .icon-img,
[data-theme="dark"] .submenu-item .icon-img {
  filter: grayscale(1) brightness(1.9) contrast(2);
}

[data-theme="dark"] .menu-item .icon-fallback,
[data-theme="dark"] .submenu-item .icon-fallback {
  color: #fff;
  text-shadow: 0 1px 0 #000, 0 0 1px #000;
}

.close-btn {
  display: none;
  background: none;
  border: none;
  color: var(--sidebar-text);
  font-size: 1.6rem;
  text-shadow: 0 1px 0 #000, 0 0 1px #000;
  cursor: pointer;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 4px;
  transition: background var(--transition);
}

.close-btn:hover {
  background: var(--sidebar-hover);
}

/* ========== Menu ========== */
.menu {
  list-style: none;
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  cursor: pointer;
  border-radius: 8px;
  margin: 2px 8px;
  transition: background var(--transition), color var(--transition);
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.menu-item:hover {
  background: var(--sidebar-hover);
  color: #f8fafc;
}

.menu-item.active {
  background: var(--sidebar-active);
  color: #ffffff;
}

.menu-item .label {
  font-size: 0.95rem;
  font-weight: 500;
  white-space: nowrap;
}

/* ========== Sub-menu ========== */
.menu-group {
  list-style: none;
}

.menu-parent {
  justify-content: flex-start;
}

.menu-parent .arrow {
  margin-left: auto;
  font-size: 1.1rem;
  transition: transform var(--transition);
  display: inline-block;
  line-height: 1;
  color: #94a3b8;
}

.menu-parent.open .arrow {
  transform: rotate(90deg);
}

.submenu {
  list-style: none;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.submenu.open {
  max-height: 520px;
}

.submenu-item {
  padding-left: 48px !important;
  font-size: 0.88rem !important;
}

.submenu-item .icon {
  font-size: 1rem !important;
}

/* ========== Sidebar Footer ========== */
.sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid #334155;
  font-size: 0.75rem;
  color: #64748b;
}

/* ========== Toggle Button (mobile) ========== */
.toggle-btn {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 300;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1.3rem;
  text-shadow: 0 1px 0 #000, 0 0 1px #000;
  padding: 8px 12px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  transition: background var(--transition);
}

.toggle-btn:hover {
  background: var(--primary-dark);
}

/* ========== Overlay (mobile) ========== */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 150;
  opacity: 0;
  transition: opacity var(--transition);
}

.overlay.active {
  opacity: 1;
}

/* ========== Main Content ========== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left var(--transition);
}

/* ========== Topbar ========== */
.topbar {
  background: var(--topbar-bg);
  border-bottom: 1px solid var(--topbar-border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  transition: background var(--transition), border-color var(--transition);
}

.page-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
  transition: color var(--transition);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.user-name-display {
  font-size: 0.9rem;
  color: #475569;
}

[data-theme="dark"] .user-name-display {
  color: #cbd5e1;
}

/* ========== Botão Tema ========== */
.theme-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--topbar-border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.theme-btn:hover {
  background: var(--body-bg);
}

.theme-btn .theme-icon {
  font-size: 1.05rem;
  line-height: 1;
  text-shadow: 0 1px 0 #000, 0 0 1px #000;
}

/* ========== Botão Logout ========== */
.logout-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: #fee2e2;
  color: #dc2626;
  border: 1px solid #fecaca;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.logout-btn:hover {
  background: #fecaca;
  border-color: #dc2626;
}

[data-theme="dark"] .logout-btn {
  background: #7f1d1d;
  color: #fca5a5;
  border-color: #991b1b;
}

[data-theme="dark"] .logout-btn:hover {
  background: #991b1b;
  border-color: #fca5a5;
}

/* ========== Content Wrapper / Iframe ========== */
.content-wrapper {
  flex: 1;
  padding: 24px;
  display: flex;
  flex-direction: column;
}

#contentFrame {
  flex: 1;
  width: 100%;
  min-height: calc(100vh - 64px - 48px);
  border: none;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 1px 6px rgba(0,0,0,0.08);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .close-btn {
    display: block;
  }

  .toggle-btn {
    display: block;
  }

  .overlay {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .topbar {
    padding-left: 60px;
  }

  .content-wrapper {
    padding: 16px;
  }
}