:root {
  --sidebar-width-expanded: 260px;
  --sidebar-width-collapsed: 88px;
  --sidebar-width: var(--sidebar-width-expanded);
  --app-padding: 32px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  min-width: 0;
}

html,
body {
  width: 100%;
  max-width: 100%;
}

body,
[data-template] {
  transition: background-color var(--transition), color var(--transition);
}

.app-shell {
  display: block;
  min-height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
  background: var(--wt-bg-main);
  color: var(--wt-text-secondary);
}

html.sidebar-collapsed,
body.sidebar-collapsed {
  --sidebar-width: var(--sidebar-width-collapsed);
}

html,
body {
  overflow-x: hidden;
}

body.login-page .app-shell {
  display: block !important;
  padding: 0;
  background: none;
}

body.login-page {
  background: var(--login-bg-dark);
}

:root[data-theme="light"] body.login-page {
  background: var(--login-bg-light);
}

.app-main {
  min-height: 100vh;
  margin: 0 0 0 var(--sidebar-width);
  background: var(--wt-bg-main);
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 28px;
  width: calc(100% - var(--sidebar-width));
  max-width: 100%;
  overflow: visible;
  position: relative;
  isolation: isolate;
}

.app-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: var(--app-padding);
  width: 100%;
  box-sizing: border-box;
  position: relative;
  isolation: isolate;
}

.app-content::before {
  z-index: 0;
}

.app-content > * {
  position: relative;
  z-index: 1;
}

.page-body {
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 1200px;
  padding: 0;
  box-sizing: border-box;
  overflow: visible;
}

.flash-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 0;
  box-sizing: border-box;
}

.content,
.workspace,
.dashboard-grid,
.page-container {
  width: 100%;
  max-width: 100%;
  display: block;
  overflow: visible;
  box-sizing: border-box;
}

.app-topbar,
.topbar {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  background: var(--wt-bg-elevated);
  border: 1px solid var(--wt-border-subtle);
  border-radius: 16px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.28);
  gap: 16px;
}

.app-topbar__left {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
}

.app-topbar__right {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.page-title {
  margin: 0;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--wt-text-primary);
}

.page-subtitle {
  margin: 6px 0 0;
  color: var(--wt-text-muted);
  font-size: 14px;
}

.page-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.wt-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--wt-bg-elevated-2);
  padding: 6px 10px;
  border-radius: 12px;
  border: 1px solid var(--wt-border-subtle);
  width: fit-content;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

.wt-brand__logo {
  height: 32px;
  max-width: 128px;
  width: auto;
  object-fit: contain;
  border-radius: 10px;
  background: var(--wt-bg-elevated);
  border: 1px solid var(--wt-border-subtle);
  padding: 4px;
}

.wt-brand__name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--wt-text-primary);
  white-space: nowrap;
}

.topbar__controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar__actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.topbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--wt-bg-elevated-2);
  border: 1px solid var(--wt-border-subtle);
}

.topbar-btn svg {
  width: 22px;
  height: 22px;
  color: var(--wt-text-secondary);
}

body[data-template="compact"] .page-body {
  max-width: 1180px;
  gap: 22px;
}

body[data-template="panels"] .card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
  border-color: var(--wt-border-strong);
  box-shadow: var(--shadow-sm);
}

body[data-template="panels"] .topbar {
  background: linear-gradient(120deg, rgba(123, 97, 255, 0.18), rgba(123, 97, 255, 0));
  border-color: var(--wt-border-subtle);
}

@media (min-width: 1025px) {
  .topbar-btn {
    display: none !important;
  }
}

@media (max-width: 1024px) {
  .topbar-btn {
    display: flex !important;
  }
}

.topbar__menu {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  color: var(--wt-text-secondary);
  cursor: pointer;
  padding: 0;
}

.header-timer {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--wt-border-subtle);
  background: var(--wt-bg-elevated-2);
  color: var(--wt-primary);
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition);
}

.header-timer:hover {
  border-color: var(--wt-primary-hover);
  transform: translateY(-1px);
}

.header-timer__value {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.theme-switch {
  position: relative;
  width: 56px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface-hover);
  cursor: pointer;
  padding: 4px;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.theme-switch__thumb {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), var(--accent-hover));
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-sm);
}

.theme-switch[data-theme-state="dark"] {
  background: var(--accent-bg);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(123, 97, 255, 0.16);
}

.theme-switch[data-theme-state="dark"] .theme-switch__thumb {
  transform: translateX(26px);
  box-shadow: 0 10px 24px rgba(123, 97, 255, 0.35);
}

@media (max-width: 1023px) {
  .app-shell {
    display: block;
  }

  .app-main {
    margin-left: 0;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .app-content {
    padding: 16px;
    gap: 20px;
  }

  .page-body {
    gap: 24px;
    padding: 0;
  }

  .flash-stack {
    padding: 0;
  }

  .app-topbar,
  .topbar {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 14px;
  }

  .topbar__controls {
    justify-content: space-between;
    width: 100%;
  }

  .topbar__actions,
  .app-topbar__right {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-left: 0;
  }

  .page-head {
    flex-direction: column;
    align-items: stretch;
  }

  .page-actions .btn,
  .page-actions .wt-btn {
    width: 100%;
  }

  .page-head {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .topbar__actions {
    gap: 8px;
  }

  .header-timer,
  .theme-switch {
    width: 100%;
  }
}