/* components/drawer/drawer.css */
/* Drawer Component */
/* WCAG 2.2 AAA compliant */

/* Component-specific custom properties */
.c-drawer {
  /* Z-index hierarchy */
  --c-drawer-backdrop-z-index: 1900;
  --c-drawer-container-z-index: 1901;
  
  /* Timing */
  --c-drawer-transition-duration: 250ms;
  --c-drawer-transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Backdrop */
  --c-drawer-backdrop-bg: rgba(12, 26, 61, 0.5);
  
  /* Container */
  --c-drawer-bg: var(--ds-color-surface);
  --c-drawer-shadow: var(--ds-shadow-xl);
  --c-drawer-border-color: var(--ds-color-border);
  
  /* Sizes */
  --c-drawer-width: 20rem;
  --c-drawer-height: 100%;
  --c-drawer-max-width: 90vw;
  --c-drawer-max-height: 90vh;
  
  /* Header */
  --c-drawer-header-padding: var(--ds-space-l);
  --c-drawer-header-border-color: var(--ds-color-border);
  --c-drawer-header-bg: var(--ds-color-surface);
  
  /* Body */
  --c-drawer-body-padding: var(--ds-space-l);
  
  /* Footer */
  --c-drawer-footer-padding: var(--ds-space-l);
  --c-drawer-footer-border-color: var(--ds-color-border);
  --c-drawer-footer-bg: var(--ds-color-surface);
  
  /* Close button */
  --c-drawer-close-size: 2.5rem;
  --c-drawer-close-color: var(--ds-color-icon);
  --c-drawer-close-hover-color: var(--ds-color-text);
  --c-drawer-close-hover-bg: var(--ds-color-button-hover);
}

/* Drawer backdrop */
.c-drawer__backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--c-drawer-backdrop-z-index);
  background: var(--c-drawer-backdrop-bg);
  opacity: 0;
  visibility: hidden;
  transition: 
    opacity var(--c-drawer-transition-duration) var(--c-drawer-transition-timing),
    visibility var(--c-drawer-transition-duration) var(--c-drawer-transition-timing);
  will-change: opacity;
}

/* Active backdrop */
.c-drawer--open .c-drawer__backdrop {
  opacity: 1;
  visibility: visible;
}

/* Drawer container */
.c-drawer__container {
  position: fixed;
  z-index: var(--c-drawer-container-z-index);
  background: var(--c-drawer-bg);
  box-shadow: var(--c-drawer-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform var(--c-drawer-transition-duration) var(--c-drawer-transition-timing);
  will-change: transform;
}

/* Drawer header */
.c-drawer__header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-m);
  padding: var(--c-drawer-header-padding);
  background: var(--c-drawer-header-bg);
  border-bottom: 1px solid var(--c-drawer-header-border-color);
  flex-shrink: 0;
  user-select: none;
}

/* Drawer title */
.c-drawer__title {
  margin: 0;
  font-size: var(--ds-font-size-xl);
  font-weight: var(--ds-font-weight-semibold);
  line-height: var(--ds-line-height-s);
  color: var(--ds-color-text);
}

/* Drawer close button */
.c-drawer__close {
  width: var(--c-drawer-close-size);
  height: var(--c-drawer-close-size);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--ds-radius-m);
  color: var(--c-drawer-close-color);
  cursor: pointer;
  transition: all var(--ds-duration-fast) var(--ds-ease-out);
  flex-shrink: 0;
}

.c-drawer__close:hover {
  background: var(--c-drawer-close-hover-bg);
  color: var(--c-drawer-close-hover-color);
}

.c-drawer__close:focus-visible {
  outline: var(--ds-focus-ring-width) solid var(--ds-focus-ring-color);
  outline-offset: var(--ds-focus-ring-offset);
}

.c-drawer__close svg {
  width: 1.25rem;
  height: 1.25rem;
  stroke: currentColor;
  stroke-width: 2;
}

/* Drawer body */
.c-drawer__body {
  flex: 1;
  padding: var(--c-drawer-body-padding);
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  
  /* Smooth scrolling */
  scroll-behavior: smooth;
  
  /* Custom scrollbar */
  scrollbar-width: thin;
  scrollbar-color: var(--ds-color-border) transparent;
}

.c-drawer__body::-webkit-scrollbar {
  width: 0.5rem;
}

.c-drawer__body::-webkit-scrollbar-track {
  background: transparent;
}

.c-drawer__body::-webkit-scrollbar-thumb {
  background: var(--ds-color-border);
  border-radius: var(--ds-radius-pill);
}

.c-drawer__body::-webkit-scrollbar-thumb:hover {
  background: var(--ds-color-border-strong);
}

/* Drawer footer */
.c-drawer__footer {
  padding: var(--c-drawer-footer-padding);
  background: var(--c-drawer-footer-bg);
  border-top: 1px solid var(--c-drawer-footer-border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--ds-space-m);
  flex-shrink: 0;
}

/* ========================================
   Drawer Positions
   ======================================== */

/* Left drawer (default) */
.c-drawer--left .c-drawer__container {
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--c-drawer-width);
  max-width: var(--c-drawer-max-width);
  transform: translateX(-100%);
  border-right: 1px solid var(--c-drawer-border-color);
}

.c-drawer--left.c-drawer--open .c-drawer__container {
  transform: translateX(0);
}

/* Right drawer */
.c-drawer--right .c-drawer__container {
  top: 0;
  right: 0;
  bottom: 0;
  width: var(--c-drawer-width);
  max-width: var(--c-drawer-max-width);
  transform: translateX(100%);
  border-left: 1px solid var(--c-drawer-border-color);
}

.c-drawer--right.c-drawer--open .c-drawer__container {
  transform: translateX(0);
}

/* Top drawer */
.c-drawer--top .c-drawer__container {
  top: 0;
  left: 0;
  right: 0;
  height: var(--c-drawer-height);
  max-height: var(--c-drawer-max-height);
  transform: translateY(-100%);
  border-bottom: 1px solid var(--c-drawer-border-color);
}

.c-drawer--top.c-drawer--open .c-drawer__container {
  transform: translateY(0);
}

/* Bottom drawer */
.c-drawer--bottom .c-drawer__container {
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--c-drawer-height);
  max-height: var(--c-drawer-max-height);
  transform: translateY(100%);
  border-top: 1px solid var(--c-drawer-border-color);
}

.c-drawer--bottom.c-drawer--open .c-drawer__container {
  transform: translateY(0);
}

/* ========================================
   Drawer Sizes
   ======================================== */

/* Small */
.c-drawer--small {
  --c-drawer-width: 16rem;
  --c-drawer-height: 20rem;
}

/* Medium (default) */
.c-drawer--medium {
  --c-drawer-width: 20rem;
  --c-drawer-height: 30rem;
}

/* Large */
.c-drawer--large {
  --c-drawer-width: 30rem;
  --c-drawer-height: 40rem;
}

/* Extra Large */
.c-drawer--xl {
  --c-drawer-width: 40rem;
  --c-drawer-height: 50rem;
}

/* Full */
.c-drawer--full {
  --c-drawer-width: 100vw;
  --c-drawer-height: 100vh;
  --c-drawer-max-width: 100vw;
  --c-drawer-max-height: 100vh;
}

/* ========================================
   Drawer Modes
   ======================================== */

/* Push mode */
.c-drawer--push {
  /* Push mode requires JavaScript to move main content */
}

.c-drawer--push.c-drawer--left.c-drawer--open ~ .c-main,
.c-drawer--push.c-drawer--left.c-drawer--open ~ main {
  transform: translateX(var(--c-drawer-width));
  transition: transform var(--c-drawer-transition-duration) var(--c-drawer-transition-timing);
}

.c-drawer--push.c-drawer--right.c-drawer--open ~ .c-main,
.c-drawer--push.c-drawer--right.c-drawer--open ~ main {
  transform: translateX(calc(-1 * var(--c-drawer-width)));
  transition: transform var(--c-drawer-transition-duration) var(--c-drawer-transition-timing);
}

/* Persistent mode */
.c-drawer--persistent .c-drawer__backdrop {
  display: none;
}

.c-drawer--persistent .c-drawer__container {
  position: relative;
  z-index: 1;
  box-shadow: none;
  border: none;
  transform: none !important;
  transition: width var(--c-drawer-transition-duration) var(--c-drawer-transition-timing);
}

.c-drawer--persistent.c-drawer--left {
  display: flex;
}

.c-drawer--persistent.c-drawer--left .c-drawer__container {
  width: 0;
  overflow: hidden;
}

.c-drawer--persistent.c-drawer--left.c-drawer--open .c-drawer__container {
  width: var(--c-drawer-width);
}

/* Mini variant */
.c-drawer--mini {
  --c-drawer-width-collapsed: 4rem;
}

.c-drawer--mini.c-drawer--left .c-drawer__container {
  width: var(--c-drawer-width-collapsed);
  transform: none;
}

.c-drawer--mini.c-drawer--left.c-drawer--open .c-drawer__container {
  width: var(--c-drawer-width);
}

.c-drawer--mini .c-drawer__header {
  padding: var(--ds-space-m);
}

.c-drawer--mini:not(.c-drawer--open) .c-drawer__title,
.c-drawer--mini:not(.c-drawer--open) .c-drawer__close {
  display: none;
}

.c-drawer--mini:not(.c-drawer--open) .c-drawer__body {
  padding: var(--ds-space-s);
}

.c-drawer--mini:not(.c-drawer--open) .c-drawer__footer {
  padding: var(--ds-space-s);
  justify-content: center;
}

/* ========================================
   Navigation Drawer
   ======================================== */

.c-drawer--nav .c-drawer__body {
  padding: 0;
}

.c-drawer__nav {
  list-style: none;
  margin: 0;
  padding: var(--ds-space-s) 0;
}

.c-drawer__nav-item {
  position: relative;
}

.c-drawer__nav-link {
  display: flex;
  align-items: center;
  gap: var(--ds-space-m);
  padding: var(--ds-space-s) var(--ds-space-l);
  color: var(--ds-color-text);
  text-decoration: none;
  transition: all var(--ds-duration-fast) var(--ds-ease-out);
  cursor: pointer;
  user-select: none;
}

.c-drawer__nav-link:hover {
  background: var(--ds-color-nav-hover);
}

.c-drawer__nav-link:focus-visible {
  outline: var(--ds-focus-ring-width) solid var(--ds-focus-ring-color);
  outline-offset: calc(-1 * var(--ds-focus-ring-width));
}

.c-drawer__nav-link--active {
  background: var(--ds-color-active);
  color: var(--ds-color-accent);
  font-weight: var(--ds-font-weight-semibold);
}

.c-drawer__nav-link--active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ds-color-accent);
}

.c-drawer__nav-icon {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  stroke: currentColor;
  stroke-width: 2;
}

.c-drawer__nav-text {
  flex: 1;
}

.c-drawer__nav-badge {
  padding: 0.125rem 0.5rem;
  background: var(--ds-color-status-notification);
  color: white;
  font-size: var(--ds-font-size-xs);
  font-weight: var(--ds-font-weight-semibold);
  border-radius: var(--ds-radius-pill);
}

/* Nested navigation */
.c-drawer__nav-group {
  margin: var(--ds-space-s) 0;
}

.c-drawer__nav-group-title {
  padding: var(--ds-space-s) var(--ds-space-l);
  font-size: var(--ds-font-size-s);
  font-weight: var(--ds-font-weight-semibold);
  color: var(--ds-color-text-weak);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.c-drawer__nav-group .c-drawer__nav-link {
  padding-left: calc(var(--ds-space-l) + var(--ds-space-l));
}

/* ========================================
   Drawer Handle
   ======================================== */

.c-drawer__handle {
  position: absolute;
  width: 1.5rem;
  height: 4rem;
  background: var(--ds-color-accent);
  border-radius: 0 var(--ds-radius-m) var(--ds-radius-m) 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--ds-duration-fast) var(--ds-ease-out);
  z-index: 10;
}

.c-drawer--left .c-drawer__handle {
  right: -1.5rem;
  top: 50%;
  transform: translateY(-50%);
}

.c-drawer--right .c-drawer__handle {
  left: -1.5rem;
  top: 50%;
  transform: translateY(-50%);
  border-radius: var(--ds-radius-m) 0 0 var(--ds-radius-m);
}

.c-drawer__handle:hover {
  width: 2rem;
}

.c-drawer__handle svg {
  width: 1rem;
  height: 1rem;
  stroke: white;
  stroke-width: 3;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  .c-drawer {
    --c-drawer-width: 80vw;
    --c-drawer-max-width: 100vw;
  }
  
  .c-drawer--large,
  .c-drawer--xl {
    --c-drawer-width: 90vw;
  }
  
  .c-drawer__header {
    padding: var(--ds-space-m);
  }
  
  .c-drawer__body {
    padding: var(--ds-space-m);
  }
  
  .c-drawer__footer {
    padding: var(--ds-space-m);
  }
  
  /* Force overlay mode on mobile */
  .c-drawer--push .c-drawer__backdrop {
    display: block;
  }
  
  .c-drawer--push.c-drawer--open ~ .c-main,
  .c-drawer--push.c-drawer--open ~ main {
    transform: none;
  }
}

@media (max-width: 480px) {
  .c-drawer--bottom {
    --c-drawer-height: 70vh;
  }
  
  /* Swipe handle for bottom drawer */
  .c-drawer--bottom .c-drawer__swipe-handle {
    position: absolute;
    top: 0.75rem;
    left: 50%;
    transform: translateX(-50%);
    width: 3rem;
    height: 0.25rem;
    background: var(--ds-color-border-strong);
    border-radius: var(--ds-radius-pill);
  }
}

/* ========================================
   Accessibility
   ======================================== */

/* Screen reader only text */
.c-drawer__sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Prevent body scroll when drawer is open */
body.c-drawer-open {
  overflow: hidden;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .c-drawer__container {
    border: 2px solid;
  }
  
  .c-drawer__header {
    border-bottom-width: 2px;
  }
  
  .c-drawer__footer {
    border-top-width: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .c-drawer__backdrop,
  .c-drawer__container,
  .c-drawer--push ~ .c-main,
  .c-drawer--push ~ main {
    transition-duration: 0.01ms;
  }
}

/* Print styles */
@media print {
  .c-drawer {
    display: none;
  }
}