/* ============================================================
   Layout: sidebar, content area, grids, toast, responsive
   ============================================================ */

/* === Sidebar === */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-lg) 0;
  z-index: 100;
}

.sidebar-top, .sidebar-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.sidebar-item {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.sidebar-item:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.sidebar-item.active {
  color: var(--sidebar-active);
}

.sidebar-item.active::before {
  content: '';
  position: absolute;
  left: -10px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--sidebar-active);
  border-radius: var(--radius-full);
}

/* Tooltip */
.sidebar-item[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  white-space: nowrap;
  z-index: 200;
  pointer-events: none;
}

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

/* === Theme toggle icons === */

.theme-icon-moon {
  display: none;
}

html[data-theme="light"] .theme-icon-sun {
  display: none;
}

html[data-theme="light"] .theme-icon-moon {
  display: block;
}

/* === Content area === */
.content-area {
  margin-left: var(--sidebar-width);
  padding: var(--content-padding);
  min-height: 100vh;
}

.content-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* === Page header === */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  max-height: 48px;
}

.page-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  margin: 0;
}

/* === Grid helpers === */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

/* === Login layout === */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  width: 100%;
  max-width: 400px;
}

.login-card h1 {
  text-align: center;
  margin-bottom: var(--space-3xl);
  font-size: var(--text-2xl);
}

.login-card form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.login-card .btn {
  margin-top: var(--space-md);
}

/* === Toast container === */
.toast-container {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

/* === Mobile: sidebar -> bottom bar === */
@media (width <= 768px) {
  .sidebar {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 56px;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    padding: 0;
    border-right: none;
    border-top: 1px solid var(--border-subtle);
  }

  .sidebar-top, .sidebar-bottom {
    flex-direction: row;
    gap: 0;
  }

  .sidebar-item.active::before {
    left: 50%;
    top: auto;
    bottom: 0;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
  }

  .sidebar-item[data-tooltip]:hover::after {
    display: none;
  }

  .content-area {
    margin-left: 0;
    margin-bottom: 56px;
    padding: var(--space-lg);
  }

  .grid-2col, .grid-3col {
    grid-template-columns: 1fr;
  }

  .toast-container {
    bottom: calc(56px + var(--space-lg));
    right: var(--space-lg);
    left: var(--space-lg);
  }

  .login-wrapper {
    padding: var(--space-xl);
  }

  .login-card {
    padding: var(--space-2xl) var(--space-xl);
  }
}

@media (width <= 480px) {
  .content-area {
    padding: var(--space-md);
  }

  .toast-container {
    bottom: calc(56px + var(--space-md));
    right: var(--space-md);
    left: var(--space-md);
  }
}