/* ==========================================================================
   MATERIAL DESIGN 3 - LAYOUT & RESPONSIVENESS
   Sidebar, Navigation Rail, Top App Bar, Main Content Area, Mobile Nav
   ========================================================================== */

#app-root {
  display: flex;
  min-height: 100vh;
  width: 100%;
  position: relative;
}

/* --- SIDEBAR / NAVIGATION DRAWER --- */
.app-sidebar {
  width: var(--sidebar-width);
  background-color: var(--md-sys-color-surface);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  transition: transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-standard);
  overflow-y: auto;
}

.sidebar-brand {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.brand-icon-box {
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-medium);
  background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-tertiary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: var(--md-sys-elevation-2);
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
}

/* Sidebar Navigation Items */
.sidebar-nav {
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--md-sys-color-on-surface-variant);
  padding: 12px 16px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short);
  user-select: none;
}

.nav-item:hover {
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
}

.nav-item.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-weight: 700;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Sidebar Footer / Business Selector */
.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-low);
}

.business-profile-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--md-sys-shape-corner-medium);
  background: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  cursor: pointer;
}

.business-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

/* --- MAIN WRAPPER --- */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: calc(100% - var(--sidebar-width));
  background-color: var(--md-sys-color-background);
}

/* --- TOP APP BAR --- */
.top-app-bar {
  height: var(--topbar-height);
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 90;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle-btn {
  display: none;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.quick-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-full);
  padding: 8px 16px;
  cursor: pointer;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.85rem;
  width: 260px;
  transition: all var(--md-sys-motion-duration-short);
}

.quick-search-bar:hover {
  background-color: var(--md-sys-color-surface-container);
  border-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-surface);
}

.kbd-shortcut {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface-variant);
  margin-left: auto;
}

.period-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
}

/* --- CONTENT AREA --- */
.content-area {
  flex: 1;
  padding: 28px;
  max-width: 1380px;
  width: 100%;
  margin: 0 auto;
}

/* --- MOBILE BOTTOM NAVIGATION --- */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottombar-height);
  background-color: var(--md-sys-color-surface);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  z-index: 100;
  justify-content: space-around;
  align-items: center;
  padding: 0 8px;
  box-shadow: var(--md-sys-elevation-3);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--md-sys-shape-corner-medium);
  transition: all var(--md-sys-motion-duration-short);
}

.mobile-nav-item.active {
  color: var(--md-sys-color-primary);
}

.mobile-nav-item svg {
  width: 22px;
  height: 22px;
}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 240px;
  }
  .content-area {
    padding: 20px;
  }
}

@media (max-width: 768px) {
  .app-sidebar {
    transform: translateX(-100%);
  }

  .app-sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: var(--md-sys-elevation-5);
  }

  .main-wrapper {
    margin-left: 0;
    width: 100%;
    padding-bottom: var(--bottombar-height);
  }

  .menu-toggle-btn {
    display: inline-flex;
  }

  .quick-search-bar {
    display: none;
  }

  .mobile-bottom-bar {
    display: flex;
  }

  .fab-btn {
    bottom: 80px;
    right: 16px;
    padding: 12px 18px;
    font-size: 0.85rem;
  }

  .top-app-bar {
    padding: 0 16px;
  }

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