.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 18px;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--trans-fast);
}

.btn-primary { background-color: var(--sys-primary); color: var(--sys-on-primary); }
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }

.btn-tonal { background-color: var(--sys-surface-high); color: var(--sys-text); }
.btn-tonal:hover { background-color: var(--sys-surface-hover); }

.btn-soft { background-color: var(--sys-surface); color: var(--sys-text-muted); }
.btn-soft:hover { color: var(--sys-text); background-color: var(--sys-surface-high); }

.btn-danger-soft { background-color: var(--sys-danger-bg); color: var(--sys-danger); }
.btn-danger-soft:hover { filter: brightness(1.2); }

.btn-icon-pill {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-pill);
  background-color: var(--sys-surface-low);
  color: var(--sys-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans-fast);
}
.btn-icon-pill:hover { background-color: var(--sys-surface-high); color: var(--sys-text); }

.nav-island-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 48px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--sys-text-muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--trans-fast);
  white-space: nowrap;
}
.nav-island-btn:hover { background-color: var(--sys-surface-low); color: var(--sys-text); }
.nav-island-btn.active { background-color: var(--sys-primary); color: var(--sys-on-primary); }
.collapsed .nav-island-btn span:last-child { display: none; }

.custom-select-capsule {
  position: relative;
  width: 100%;
}
.select-trigger-pill {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--sys-surface);
  color: var(--sys-text);
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background-color var(--trans-fast);
}
.select-trigger-pill:hover { background-color: var(--sys-surface-high); }
.select-trigger-text { display: flex; flex-direction: column; gap: 2px; }
.select-main-title { font-size: 13px; font-weight: 500; }
.select-sub-title { font-size: 11px; color: var(--sys-text-muted); }

.select-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background-color: var(--sys-surface-highest);
  border-radius: var(--radius-lg);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 200;
  max-height: 220px;
  overflow-y: auto;
}
.select-option-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--trans-fast);
}
.select-option-item:hover { background-color: var(--sys-surface-hover); }
.select-option-item.selected { background-color: var(--sys-primary-container); color: var(--sys-on-primary-container); }

.m3-dialog {
  border-radius: var(--radius-xl);
  background-color: var(--sys-surface-low);
  color: var(--sys-text);
  width: min(640px, 92vw);
  margin: auto;
  padding: 0;
}
.m3-dialog::backdrop { background-color: rgba(5, 8, 12, 0.75); backdrop-filter: blur(10px); }
.dialog-content { display: flex; flex-direction: column; }
.dialog-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; }
.dialog-body { padding: 0 24px 20px; display: flex; flex-direction: column; gap: 16px; }
.dialog-footer { display: flex; justify-content: flex-end; gap: 10px; padding: 16px 24px; background-color: var(--sys-surface-lowest); border-radius: 0 0 var(--radius-xl) var(--radius-xl); }

.m3-snackbar {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background-color: var(--sys-surface-highest);
  color: var(--sys-text);
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  z-index: 1000;
  font-size: 13px;
  animation: viewFadeIn var(--trans-fast);
}
.hidden { display: none !important; }