html, body { max-width: 100%; overflow-x: hidden; }
img, svg, canvas { max-width: 100%; }
button, input, select, textarea { max-width: 100%; }

@media (max-width: 1200px) {
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .analytics-grid { grid-template-columns: 1fr; }
  .kanban-board { grid-template-columns: repeat(3, minmax(260px, 1fr)); overflow-x: auto; padding-bottom: 8px; }
}

@media (max-width: 1024px) {
  #sidebar { width: 240px; }
  #main-wrapper { margin-left: 240px; }
  #main-wrapper.sidebar-collapsed { margin-left: 76px; }

  #topbar { padding: 0 20px; gap: 14px; }
  #main-content { padding: 22px 20px; }

  .search-wrapper { max-width: 360px; }
  .tasks-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .calendar-wrapper { overflow-x: auto; }
  .calendar-grid { min-width: 680px; }
}

@media (max-width: 768px) {
  body { min-width: 320px; }

  #sidebar {
    width: min(280px, 84vw);
    transform: translateX(-105%);
    transition: transform .25s ease;
    z-index: 1001;
  }

  #sidebar.mobile-open,
  #sidebar.open,
  #sidebar.show {
    transform: translateX(0);
  }

  #sidebar.collapsed {
    width: min(280px, 84vw);
  }

  #sidebar.collapsed .sidebar-logo,
  #sidebar.collapsed .nav-label,
  #sidebar.collapsed .sidebar-section-title,
  #sidebar.collapsed .sidebar-footer-text {
    opacity: 1;
    visibility: visible;
    display: revert;
  }

  #sidebar.collapsed .nav-item { justify-content: flex-start; }
  #sidebar-toggle { display: none; }

  #sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .45);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
    z-index: 1000;
  }

  #sidebar-overlay.show,
  #sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
  }

  #main-wrapper,
  #main-wrapper.sidebar-collapsed {
    margin-left: 0;
    width: 100%;
  }

  #mobile-menu-btn { display: inline-flex !important; }

  #topbar {
    min-height: 64px;
    height: auto;
    padding: 10px 16px;
    gap: 10px;
    position: sticky;
    top: 0;
    z-index: 900;
  }

  .topbar-left { min-width: 0; flex: 1; }
  .page-title {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .search-wrapper {
    display: none;
    position: absolute;
    left: 12px;
    right: 12px;
    top: calc(100% + 8px);
    max-width: none;
    width: auto;
    z-index: 950;
    box-shadow: var(--shadow-lg);
  }

  .search-wrapper.mobile-visible,
  .search-wrapper.show { display: flex; }

  #search-toggle-btn { display: inline-flex !important; }
  .topbar-actions { gap: 6px; }
  #add-task-btn span { display: none; }
  #add-task-btn { padding: 10px; min-width: 42px; justify-content: center; }

  #main-content { padding: 18px 14px 28px; }

  .dashboard-header,
  .section-header {
    gap: 14px;
    align-items: flex-start;
  }

  .section-header { flex-direction: column; }
  .section-header-right { width: 100%; }
  .section-header-right .btn { flex: 1; }

  .stats-grid,
  .tasks-grid,
  .analytics-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .filter-bar {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .filter-select {
    flex: 1 1 100%;
    width: 100%;
    min-width: 0;
  }

  .view-toggle {
    margin-left: 0 !important;
    width: 100%;
    justify-content: flex-end;
  }

  .task-card { min-width: 0; }
  .task-card-actions { flex-wrap: wrap; }

  .kanban-board {
    grid-template-columns: repeat(3, minmax(250px, 82vw));
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    padding-bottom: 12px;
  }

  .kanban-column { scroll-snap-align: start; }

  .calendar-wrapper { margin-left: -14px; margin-right: -14px; border-radius: 0; }
  .calendar-header { padding: 14px; gap: 12px; flex-wrap: wrap; }
  .calendar-grid { min-width: 630px; }

  .modal-overlay { padding: 12px; align-items: flex-end; }
  .modal {
    width: 100%;
    max-width: 100%;
    max-height: calc(100dvh - 24px);
    border-radius: 18px 18px 14px 14px;
    overflow: auto;
  }

  .modal-header,
  .modal-body,
  .modal-footer { padding-left: 16px; padding-right: 16px; }

  .modal-footer {
    flex-direction: column-reverse;
    gap: 8px;
  }

  .modal-footer .btn { width: 100%; justify-content: center; }

  .form-row { grid-template-columns: 1fr; gap: 14px; }
  .welcome-text { font-size: clamp(1.45rem, 7vw, 2rem); }
  .live-clock { display: none; }

  #toast-container {
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
  }

  .toast { width: 100%; }
}

@media (max-width: 480px) {
  #topbar { padding: 9px 12px; }
  #main-content { padding: 14px 10px 24px; }

  .page-title { font-size: .95rem; }
  .icon-btn { width: 38px; height: 38px; }

  .dashboard-header { margin-bottom: 18px; }
  .welcome-date { flex-wrap: wrap; gap: 6px; }

  .stat-card { padding: 16px; }
  .stat-icon { width: 44px; height: 44px; }

  .section-title { font-size: 1.1rem; }
  .section-subtitle { font-size: .82rem; }

  .calendar-wrapper { margin-left: -10px; margin-right: -10px; }
  .calendar-grid { min-width: 590px; }

  .kanban-board { grid-template-columns: repeat(3, minmax(235px, 88vw)); }

  .modal-overlay { padding: 0; }
  .modal {
    max-height: 92dvh;
    border-radius: 18px 18px 0 0;
  }

  .btn { min-height: 42px; }
}

@media (hover: none) and (pointer: coarse) {
  button, .nav-item, .view-toggle-btn { min-height: 42px; }
  .nav-item { min-height: 46px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

#sidebar {
  height: 100dvh;
  min-height: 100dvh;
}

.sidebar-logo,
.sidebar-footer {
  flex: 0 0 auto;
}

.sidebar-nav {
  flex: 1 1 auto;
  min-height: 0; overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) rgba(99, 102, 241, .10);
}

.sidebar-nav::-webkit-scrollbar {
  width: 9px;
}

.sidebar-nav::-webkit-scrollbar-track {
  background: rgba(99, 102, 241, .08);
  border-radius: 999px;
  margin: 10px 2px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary, #8b5cf6));
  border: 2px solid var(--bg-sidebar);
  border-radius: 999px;
  min-height: 42px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.sidebar-footer {
  padding: 14px 16px calc(14px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border-color);
  background: linear-gradient(180deg, transparent, var(--bg-sidebar) 35%);
  box-shadow: 0 -8px 20px rgba(0, 0, 0, .03);
  position: relative;
  z-index: 2;
}

@media (max-width: 768px) {
  .dashboard-header,
  .dashboard-bottom,
  .section-header,
  .filter-bar,
  .calendar-header {
    width: 100%;
  }

  .dashboard-header,
  .dashboard-bottom,
  .calendar-header {
    flex-direction: column;
    align-items: stretch;
  }

  .section-header-right,
  .section-header-right .btn,
  .filter-bar > *,
  .toggle-group {
    min-width: 0;
  }

  .section-header-right {
    display: flex;
    width: 100%;
    gap: 8px;
  }

  .section-header-right .btn {
    width: 100%;
  }

  .filter-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 12px;
  }

  .filter-select,
  .view-toggle {
    width: 100%;
    margin: 0 !important;
  }

  .view-toggle {
    justify-content: stretch;
  }

  .view-toggle-btn {
    flex: 1 1 0;
    justify-content: center;
  }

  .task-card {
    width: 100%;
  }

  .task-meta,
  .task-footer,
  .progress-header {
    flex-wrap: wrap;
    gap: 8px;
  }

  .task-footer > *,
  .task-meta > * {
    min-width: 0;
  }

  .task-card-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .analytics-grid,
  .stats-grid,
  .tasks-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }

  .analytics-card,
  .stat-card {
    min-width: 0;
  }

  #topbar {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .topbar-actions {
    min-width: max-content;
  }

  #sidebar {
    width: min(300px, 88vw);
    max-width: 88vw;
    height: 100dvh;
    min-height: 100dvh;
    border-right: 0;
    border-radius: 0 22px 22px 0;
    box-shadow: 12px 0 36px rgba(0, 0, 0, .22);
    background: var(--bg-sidebar);
    overflow: hidden;
  }

  .sidebar-logo {
    padding: 18px 18px;
  }

  .sidebar-nav {
    padding: 12px 0 18px 8px;
  }

  .sidebar-section-title {
    padding-left: 16px;
    padding-right: 16px;
  }

  .nav-item {
    margin-right: 8px;
    border-radius: 0 12px 12px 0;
    padding: 10px 14px;
  }

  .sidebar-footer {
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  }

  .sidebar-footer .btn {
    min-height: 46px;
  }
}

@media (max-width: 560px) {
  #main-content {
    padding-left: 12px;
    padding-right: 12px;
  }

  .section-header-right {
    flex-direction: column;
  }

  .section-header-right .btn {
    justify-content: center;
  }

  .stat-card {
    align-items: flex-start;
  }

  .stat-info {
    min-width: 0;
  }

  .welcome-date {
    align-items: flex-start;
  }

  .calendar-header > * {
    width: 100%;
  }

  .calendar-title {
    text-align: center;
  }

  .calendar-header .btn,
  .calendar-header button {
    width: 100%;
    justify-content: center;
  }

  .form-row {
    grid-template-columns: minmax(0, 1fr) !important;
  }
}

@media (max-width: 390px) {
  #topbar {
    padding-left: 8px;
    padding-right: 8px;
    gap: 6px;
  }

  #add-task-btn {
    min-width: 38px;
    width: 38px;
    height: 38px;
    padding: 0;
  }

  .icon-btn,
  #mobile-menu-btn {
    width: 38px;
    height: 38px;
  }

  .page-title {
    font-size: .9rem;
  }

  #sidebar {
    width: min(292px, 90vw);
    max-width: 90vw;
  }
}

@media (max-width: 768px) {
  .dashboard-bottom {
    grid-template-columns: minmax(0, 1fr) !important;
    gap: 14px;
  }

  .nav-item[data-view="kanban"] { display: none !important; }
  #page-kanban { display: none !important; }
}

body.force-mobile-layout {
  min-width: 320px;
}

body.force-mobile-layout #main-wrapper,
body.force-mobile-layout #main-wrapper.sidebar-collapsed {
  margin-left: 0 !important;
  width: 100% !important;
}

body.force-mobile-layout #sidebar {
  width: min(300px, 88vw) !important;
  max-width: 88vw !important;
  height: 100dvh !important;
  min-height: 100dvh !important;
  transform: translateX(-105%);
  border-right: 0;
  border-radius: 0 22px 22px 0;
  box-shadow: 12px 0 36px rgba(0, 0, 0, .22);
  overflow: hidden;
}

body.force-mobile-layout #sidebar.mobile-open,
body.force-mobile-layout #sidebar.open,
body.force-mobile-layout #sidebar.show {
  transform: translateX(0);
}

body.force-mobile-layout #sidebar-toggle { display: none !important; }
body.force-mobile-layout #mobile-menu-btn { display: inline-flex !important; }

body.force-mobile-layout #sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .45);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s ease;
  z-index: 1000;
}

body.force-mobile-layout #sidebar-overlay.show,
body.force-mobile-layout #sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

body.force-mobile-layout .sidebar-logo,
body.force-mobile-layout .sidebar-footer {
  flex: 0 0 auto;
}

body.force-mobile-layout .sidebar-nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  touch-action: pan-y;
  padding: 12px 0 18px 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-primary) rgba(99, 102, 241, .12);
}

body.force-mobile-layout .sidebar-nav::-webkit-scrollbar {
  width: 10px;
}

body.force-mobile-layout .sidebar-nav::-webkit-scrollbar-track {
  background: rgba(99, 102, 241, .10);
  border-radius: 999px;
  margin: 10px 2px;
}

body.force-mobile-layout .sidebar-nav::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary, #8b5cf6));
  border: 2px solid var(--bg-sidebar);
  border-radius: 999px;
  min-height: 48px;
}

body.force-mobile-layout .sidebar-footer {
  position: relative;
  z-index: 3;
  padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border-color);
  background: var(--bg-sidebar);
  box-shadow: 0 -10px 24px rgba(0, 0, 0, .06);
}

body.force-mobile-layout .sidebar-footer .btn { min-height: 46px; }
body.force-mobile-layout .nav-item {
  margin-right: 8px;
  border-radius: 0 12px 12px 0;
  padding: 10px 14px;
}
body.force-mobile-layout .sidebar-section-title {
  padding-left: 16px;
  padding-right: 16px;
}

body.force-mobile-layout #topbar {
  min-height: 64px;
  height: auto;
  padding: 10px 16px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
}

body.force-mobile-layout #main-content {
  padding: 18px 14px 28px;
}

body.force-mobile-layout .topbar-left { min-width: 0; }
body.force-mobile-layout .page-title {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

body.force-mobile-layout .search-wrapper {
  display: none;
  position: absolute;
  left: 12px;
  right: 12px;
  top: calc(100% + 8px);
  width: auto;
  max-width: none;
  z-index: 950;
}
body.force-mobile-layout .search-wrapper.mobile-visible,
body.force-mobile-layout .search-wrapper.show { display: flex; }
body.force-mobile-layout #search-toggle-btn { display: inline-flex !important; }
body.force-mobile-layout #add-task-btn span { display: none; }
body.force-mobile-layout #add-task-btn {
  padding: 10px;
  min-width: 42px;
  justify-content: center;
}

body.force-mobile-layout .stats-grid,
body.force-mobile-layout .tasks-grid,
body.force-mobile-layout .analytics-grid,
body.force-mobile-layout .dashboard-bottom {
  grid-template-columns: minmax(0, 1fr) !important;
  gap: 14px;
}

body.force-mobile-layout .dashboard-bottom { display: grid !important; }

body.force-mobile-layout .section-header,
body.force-mobile-layout .calendar-header,
body.force-mobile-layout .dashboard-header {
  flex-direction: column;
  align-items: stretch;
}

body.force-mobile-layout .section-header-right,
body.force-mobile-layout .section-header-right .btn,
body.force-mobile-layout .filter-select,
body.force-mobile-layout .view-toggle {
  width: 100%;
}

body.force-mobile-layout .section-header-right {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

body.force-mobile-layout .filter-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: stretch;
}

body.force-mobile-layout .view-toggle {
  margin-left: 0 !important;
  justify-content: stretch;
}
body.force-mobile-layout .view-toggle-btn {
  flex: 1 1 0;
  justify-content: center;
}

body.force-mobile-layout .nav-item[data-view="kanban"],
body.force-mobile-layout #page-kanban {
  display: none !important;
}

body.force-mobile-layout .calendar-wrapper {
  overflow-x: auto;
  margin-left: -14px;
  margin-right: -14px;
  border-radius: 0;
}
body.force-mobile-layout .calendar-grid { min-width: 630px; }

@media (max-width: 390px) {
  body.force-mobile-layout #sidebar {
    width: min(292px, 90vw) !important;
    max-width: 90vw !important;
  }
  body.force-mobile-layout #topbar {
    padding-left: 8px;
    padding-right: 8px;
    gap: 6px;
  }
  body.force-mobile-layout #main-content {
    padding-left: 10px;
    padding-right: 10px;
  }
}

@media (max-width: 768px) {
  #page-calendar .section-header-right {
    flex-direction: row !important;
    width: 100%;
    display: grid !important;
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    gap: 8px;
  }

  #page-calendar .section-header-right .btn {
    width: 100% !important;
    min-width: 0;
    justify-content: center;
  }

  #page-calendar .calendar-wrapper {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
    touch-action: pan-x pan-y;
    padding-bottom: 6px;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) rgba(99, 102, 241, .12);
  }

  #page-calendar .calendar-wrapper::-webkit-scrollbar { height: 8px; }
  #page-calendar .calendar-wrapper::-webkit-scrollbar-track {
    background: rgba(99, 102, 241, .08);
    border-radius: 999px;
  }
  #page-calendar .calendar-wrapper::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 999px;
  }

  #page-calendar .calendar-header {
    min-width: 700px;
    flex-direction: row !important;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 14px 16px;
  }

  #page-calendar .calendar-grid {
    min-width: 700px !important;
    grid-template-columns: repeat(7, minmax(100px, 1fr));
  }

  #page-calendar .calendar-day-header {
    padding: 10px 6px;
    font-size: .72rem;
  }

  #page-calendar .calendar-day {
    min-height: 108px;
    padding: 8px;
  }

  #page-calendar .day-task-dot {
    font-size: .68rem;
    padding: 3px 5px;
  }

  .nav-item[data-view="kanban"],
  #page-kanban { display: none !important; }
}

body.force-mobile-layout #page-calendar .section-header-right {
  flex-direction: row !important;
  width: 100%;
  display: grid !important;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  gap: 8px;
}

body.force-mobile-layout #page-calendar .section-header-right .btn {
  width: 100% !important;
  min-width: 0;
  justify-content: center;
}

body.force-mobile-layout #page-calendar .calendar-wrapper {
  overflow-x: auto !important;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
  touch-action: pan-x pan-y;
  margin-left: -14px;
  margin-right: -14px;
  border-radius: 0;
  padding-bottom: 8px;
}

body.force-mobile-layout #page-calendar .calendar-header {
  min-width: 700px;
  flex-direction: row !important;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
}

body.force-mobile-layout #page-calendar .calendar-grid {
  min-width: 700px !important;
  grid-template-columns: repeat(7, minmax(100px, 1fr));
}

body.force-mobile-layout #page-calendar .calendar-day {
  min-height: 108px;
  padding: 8px;
}

body.force-mobile-layout #page-calendar .calendar-day-header {
  padding: 10px 6px;
  font-size: .72rem;
}

body.force-mobile-layout #page-calendar .day-task-dot {
  font-size: .68rem;
  padding: 3px 5px;
}

body.force-mobile-layout .nav-item[data-view="kanban"],
body.force-mobile-layout #page-kanban {
  display: none !important;
}

@media (max-width: 390px) {
  #page-calendar .calendar-header,
  #page-calendar .calendar-grid,
  body.force-mobile-layout #page-calendar .calendar-header,
  body.force-mobile-layout #page-calendar .calendar-grid {
    min-width: 630px !important;
  }

  #page-calendar .calendar-grid,
  body.force-mobile-layout #page-calendar .calendar-grid {
    grid-template-columns: repeat(7, minmax(90px, 1fr));
  }
}