/* Enhanced Responsive Sidebar Styles */

/* Import CSS variables from main styles */
:root {
  --color-sidebar-bg: #f0f2f5;
  --color-primary: #1877f2;
  --color-primary-hover: #165ec9;
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-text: #606770;
  --radius: 0.75rem;
  --transition: 0.3s cubic-bezier(.4,0,.2,1);
  --sidebar-width: 280px;
  --sidebar-width-mobile: 80vw;
  --sidebar-width-mobile-max: 320px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
}

/* ===============================
   SIDEBAR CORE
   =============================== */

.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar-bg);
  padding: var(--spacing-xl) var(--spacing-lg);
  box-shadow: 2px 0 16px var(--color-shadow);
  border-radius: 0 var(--radius) var(--radius) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  z-index: 1000;
  transition: left var(--transition), transform var(--transition);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.sidebar h2 {
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-primary);
  margin: 0 0 var(--spacing-xl) 0;
  user-select: none;
  letter-spacing: 0.02em;
}

.greeting {
  margin-bottom: var(--spacing-md);
  font-size: clamp(0.875rem, 2vw, 1rem);
  color: var(--color-text);
  font-weight: 600;
}

nav {
  flex-grow: 1;
  overflow-y: auto;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: var(--spacing-sm) 0;
  font-weight: 600;
  font-size: clamp(0.875rem, 2vw, 1rem);
  user-select: none;
}

.nav-item > a,
.nav-item > button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  font-weight: 600;
  min-height: 44px; /* Touch-friendly */
}

.nav-item > a:hover,
.nav-item > button:hover,
.nav-item > a:focus-visible,
.nav-item > button:focus-visible {
  background: #d5e3fc;
  color: var(--color-primary-hover);
  outline-offset: 3px;
  outline: 3px solid #a7c3fb;
  transform: scale(1.02);
}

.nav-item > a:active,
.nav-item > button:active {
  transform: scale(0.98);
}

/* Active link highlighting */
.nav-list a.active {
  background: #d5e3fc;
  color: var(--color-primary-hover);
  font-weight: 700;
}

/* Submenu styles */
ul.submenu {
  list-style: none;
  margin: 0;
  padding-left: var(--spacing-lg);
  margin-top: var(--spacing-xs);
  display: none;
  flex-direction: column;
  gap: var(--spacing-xs);
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
  transform: translateY(-10px);
}

.nav-item.open > ul.submenu {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

ul.submenu a {
  font-weight: 400;
  font-size: clamp(0.8rem, 1.8vw, 0.95rem);
  color: var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius);
  text-decoration: none;
  display: block;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}

ul.submenu a:hover,
ul.submenu a:focus-visible {
  background: #d5e3fc;
  color: var(--color-primary-hover);
  outline-offset: 3px;
  outline: 3px solid #a7c3fb;
  transform: scale(1.02);
}

/* Dropdown arrow */
.dropdown-arrow {
  width: 1rem;
  height: 1rem;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(45deg);
  margin-left: var(--spacing-sm);
  transition: transform var(--transition);
}

.nav-item.open > button .dropdown-arrow,
.dropdown-arrow.open {
  transform: rotate(-135deg);
}

/* Logout button */
.logout-btn {
  margin-top: auto;               /* pushes logout to bottom */
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: #f44336;
  color: white;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  font-size: clamp(0.875rem, 2vw, 1rem);
  min-height: 44px;
  transition: background-color var(--transition), transform var(--transition);
  box-shadow: 0 2px 8px rgba(244, 67, 54, 0.2);
  position: sticky;
  bottom: 20px;
  z-index: 2;
}

.logout-btn:hover,
.logout-btn:focus-visible {
  background-color: #d32f2f;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(244, 67, 54, 0.3);
  outline: none;
}

.logout-btn:active {
  transform: translateY(0);
}

/* Auth button (Login/Register) */
.auth-btn {
  margin-top: auto;
  margin-bottom: var(--spacing-sm);
  align-self: flex-start;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: clamp(0.875rem, 2vw, 1rem);
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--color-shadow);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
  letter-spacing: 0.01em;
  min-height: 44px;
  width: 100%;
}

.auth-btn:hover,
.auth-btn:focus-visible {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 16px var(--color-shadow);
  transform: translateY(-2px) scale(1.02);
  outline: none;
}

.auth-btn:active {
  transform: translateY(0) scale(0.98);
}

/* ===============================
   HAMBURGER
   =============================== */

.hamburger {
  display: none; /* Hidden by default on desktop */
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  z-index: 1100;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  transition: transform var(--transition);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--color-primary);
  margin: 4px 0;
  transition: transform var(--transition), opacity var(--transition);
  border-radius: 2px;
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

.hamburger:hover,
.hamburger:focus-visible {
  transform: scale(1.1);
  outline: none;
}

/* ===============================
   SIDEBAR OVERLAY
   =============================== */

.sidebar-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.45);
  z-index: 900;
  opacity: 0;
  display: none;
  transition: opacity var(--transition);
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

/* ===============================
   RESPONSIVE
   =============================== */

@media (max-width: 768px) {
  .hamburger {
    display: block; /* Show on mobile */
  }

  .sidebar {
    left: -100vw;
    width: var(--sidebar-width-mobile);
    max-width: var(--sidebar-width-mobile-max);
    height: 100vh;
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md) var(--spacing-lg);
    box-shadow: 2px 0 16px var(--color-shadow);
    transition: left var(--transition);
  }
  
  .sidebar.open {
    left: 0;
  }
  
  .sidebar h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
  }
  
  .nav-item > a,
  .nav-item > button {
    padding: var(--spacing-md);
    font-size: 1rem;
    min-height: 48px; /* Larger touch targets on mobile */
  }
  
  ul.submenu a {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    min-height: 44px;
  }
  
  .logout-btn,
  .auth-btn {
    min-height: 48px;
    font-size: 1rem;
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .sidebar {
    width: 85vw;
    max-width: 300px;
    padding: var(--spacing-md) var(--spacing-sm) var(--spacing-sm) var(--spacing-md);
  }
  
  .sidebar h2 {
    font-size: 1.5rem;
  }
  
  .nav-item > a,
  .nav-item > button {
    padding: var(--spacing-md) var(--spacing-sm);
    min-height: 50px;
  }
  
  ul.submenu a {
    padding: var(--spacing-sm);
    min-height: 46px;
  }
}

@media (max-width: 360px) {
  .sidebar {
    width: 90vw;
    max-width: 280px;
  }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
  .sidebar {
    width: 60vw;
    max-width: 280px;
  }
}

/* ===============================
   ACCESSIBILITY / THEMES
   =============================== */

/* High contrast mode support */
@media (prefers-contrast: high) {
  .sidebar {
    border: 2px solid var(--color-primary);
  }
  
  .nav-item > a,
  .nav-item > button {
    border: 1px solid transparent;
  }
  
  .nav-item > a:hover,
  .nav-item > button:hover,
  .nav-item > a:focus-visible,
  .nav-item > button:focus-visible {
    border-color: var(--color-primary);
  }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .sidebar,
  .nav-item > a,
  .nav-item > button,
  ul.submenu,
  ul.submenu a,
  .logout-btn,
  .auth-btn,
  .dropdown-arrow,
  .hamburger span,
  .sidebar-overlay {
    transition: none;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-sidebar-bg: #2d2d2d;
    --color-text: #e0e0e0;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-primary: #3b82f6; /* Slightly brighter for dark mode */
    --color-primary-hover: #2563eb;
  }
  
  .sidebar {
    background: var(--color-sidebar-bg);
    color: var(--color-text);
  }
  
  .greeting {
    color: var(--color-text);
  }

  .nav-item > a:hover,
  .nav-item > button:hover,
  ul.submenu a:hover {
    background: rgba(255, 255, 255, 0.1);
  }

  .nav-list a.active {
    background: rgba(255, 255, 255, 0.1);
  }

  .hamburger span {
    background: var(--color-primary);
  }

  .dropdown-arrow {
    border-color: var(--color-primary);
  }
}

/* Focus management for accessibility */
.sidebar:focus-within {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

/* Smooth scrolling for sidebar content */
.sidebar {
  scroll-behavior: smooth;
}

/* Custom scrollbar for webkit browsers */
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(24, 119, 242, 0.3);
}

/* ===============================
   LOGO
   =============================== */

.sidebar-logo {
  text-align: center;
  padding: 20px 15px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 15px;
}

.sidebar-logo img {
  max-width: 100%;
  height: auto;
  max-height: 120px;
  display: block;
  margin: 0 auto;
  border-radius: 12px;
}

/* ===============================
   LOGOUT MODAL
   =============================== */

.logout-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logout-modal.hidden {
  display: none;
}

.logout-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
  backdrop-filter: blur(6px);
}

.logout-dialog {
  position: relative;
  z-index: 1;
  width: min(90%, 380px);
  background: linear-gradient(135deg, #0f172a, #020617);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
  animation: popIn 0.25s ease;
  border: 1px solid rgba(148,163,184,0.25);
}

.logout-dialog h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  color: #e5e7eb;
}

.logout-dialog p {
  margin: 0 0 20px;
  color: #9ca3af;
  font-size: 0.9rem;
}

.logout-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.btn-cancel {
  background: transparent;
  color: #cbd5f5;
  border: 1px solid rgba(148,163,184,0.4);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
}

.btn-cancel:hover {
  background: rgba(148,163,184,0.1);
}

.btn-confirm {
  background: linear-gradient(to right, #ef4444, #dc2626);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
}

.btn-confirm:hover {
  filter: brightness(1.1);
}

@keyframes popIn {
  from {
    transform: scale(0.95);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* Zoom animation used by profile modal as well */
@keyframes scaleIn {
  from { transform: scale(.95); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

/* ===============================
   PROFILE MODAL (SCOPED)
   =============================== */

.profile-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 100000;   /* above sidebar + logout */
  display: none;
  align-items: center;
  justify-content: center;
  pointer-events: all;
}

.profile-modal-overlay.active {
  display: flex;
}

.profile-modal {
  background: #ffffff;
  width: 520px;
  max-width: 92%;
  padding: 26px;
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.35);
  position: relative;
  animation: scaleIn .2s ease;
}

.profile-modal-close {
  position: absolute;
  top: 14px;
  right: 16px;
  font-size: 24px;
  border: none;
  background: none;
  cursor: pointer;
}

/* Tabs INSIDE profile modal only */
.profile-modal .tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.profile-modal .tab {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  border: none;
  background: #eee;
  cursor: pointer;
  font-size: 0.9rem;
}

.profile-modal .tab.active {
  background: linear-gradient(135deg,#667eea,#764ba2);
  color: white;
}

.profile-modal .tab-content {
  display: none;
}

.profile-modal .tab-content.active {
  display: block;
}

/* Buttons INSIDE profile modal only */
.profile-modal .btn-primary {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg,#667eea,#764ba2);
  border: none;
  border-radius: 10px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.profile-modal .btn-primary:hover {
  filter: brightness(1.05);
}

.profile-modal .btn-danger {
  width: 100%;
  padding: 12px;
  background: #e53935;
  border: none;
  border-radius: 10px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.profile-modal .btn-danger:hover {
  filter: brightness(1.05);
}

/* ===============================
   USER AVATAR ONLINE DOT
   =============================== */

.user-avatar-small {
  position: relative;
}

.user-avatar-small::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #22c55e;
  border: 2px solid #0f172a; /* matches sidebar bg */
}