/* ==========================================================================
   Modal Component - Unified Modal/Sheet Styles
   모든 모달, 바텀시트, 드롭다운에 사용
   ========================================================================== */

/* ---------------------------------------------------------------------------
   Modal Backdrop
   --------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: var(--z-modal-backdrop);
  display: none;
}

.modal-backdrop.visible {
  opacity: 1;
}

/* ---------------------------------------------------------------------------
   Bottom Sheet
   --------------------------------------------------------------------------- */
.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1.5px solid var(--color-glass-border);
  border-bottom: none;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-modal);
  transform: translateY(100%);
  transition: transform var(--transition-slow) var(--modal-easing);
  z-index: var(--z-modal);
  max-height: 90vh;
  overflow: hidden;
  display: none;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.bottom-sheet.open {
  transform: translateY(0);
}

.bottom-sheet__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-border-soft);
}

.bottom-sheet__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.bottom-sheet__close {
  width: var(--btn-height-sm);
  height: var(--btn-height-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
}

.bottom-sheet__close svg {
  width: var(--icon-size-md);
  height: var(--icon-size-md);
  stroke: var(--color-text-secondary);
  stroke-width: 2;
}

.bottom-sheet__content {
  padding: var(--spacing-4);
  overflow-x: hidden;
  overflow-y: auto;
  max-height: calc(90vh - var(--header-height));
}

/* Bottom sheet items — larger text & icons than dropdown */
.bottom-sheet__content .dropdown__item {
  font-size: var(--font-size-xl);
  gap: var(--spacing-list-md);
  padding: var(--spacing-list-md) 0;
}

.bottom-sheet__content .dropdown__item svg {
  width: var(--icon-size-md);
  height: var(--icon-size-md);
}


/* ---------------------------------------------------------------------------
   Center Modal
   --------------------------------------------------------------------------- */
.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1.5px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevated);
  opacity: 0;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  z-index: var(--z-modal);
  max-width: 90vw;
  max-height: 90vh;
  overflow: hidden;
  display: none;
}

.modal.visible {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* ---------------------------------------------------------------------------
   Popover Modal (expand from element)
   --------------------------------------------------------------------------- */
.popover-modal {
  position: fixed;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1.5px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevated);
  opacity: 0;
  transform: scale(0.8);
  transition: opacity var(--transition-normal), transform var(--transition-normal) var(--modal-easing);
  z-index: var(--z-modal);
  overflow: hidden;
  display: none;
}

.popover-modal.visible {
  opacity: 1;
  transform: scale(1);
}

/* ---------------------------------------------------------------------------
   Panel Navigation (slide in/out)
   --------------------------------------------------------------------------- */
.panel-container {
  position: relative;
  overflow: hidden;
}

.panel-main {
  transition: transform var(--transition-slow);
}

.panel-main.slide-out {
  transform: translateX(-100%);
}

.panel-sub {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-white);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
}

.panel-sub.active {
  transform: translateX(0);
}

.panel-header {
  display: flex;
  align-items: center;
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--color-border-soft);
}

.panel-header__back {
  width: var(--btn-height-sm);
  height: var(--btn-height-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
}

.panel-header__back svg {
  width: var(--icon-size-md);
  height: var(--icon-size-md);
  stroke: var(--color-text-primary);
  stroke-width: 2;
}

.panel-header__title {
  flex: 1;
  text-align: center;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.panel-header__right {
  width: var(--btn-height-sm);
}

/* Empty State - uses components/empty_state.css */