/* DentFlow - Codecademy Design System & Variables */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,600;0,700;1,400&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;700&display=swap');

:root {
  /* Brand Color Tokens (Codecademy Inspired) */
  --bg-main: #0D1226;
  --bg-sidebar: #0A0E1F;
  --bg-card: #151D38;
  --bg-card-hover: #1C2649;
  --bg-elevated: #202B52;
  --bg-input: #0B0F23;
  --bg-code: #0A0E1E;
  
  /* Text Tokens */
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverse: #0F172A;

  /* Codecademy Signature Accent Colors */
  --accent-yellow: #FFD300;
  --accent-yellow-hover: #F2C700;
  --accent-yellow-dim: rgba(255, 211, 0, 0.15);
  
  --accent-cyan: #22D3EE;
  --accent-cyan-dim: rgba(34, 211, 238, 0.15);
  
  --accent-purple: #A78BFA;
  --accent-purple-dim: rgba(167, 139, 250, 0.15);

  --accent-mint: #10B981;
  --accent-mint-dim: rgba(16, 185, 129, 0.15);

  --accent-crimson: #F43F5E;
  --accent-crimson-dim: rgba(244, 63, 94, 0.15);

  --accent-amber: #F59E0B;
  --accent-amber-dim: rgba(245, 158, 11, 0.15);

  /* Border Tokens */
  --border-color: #27335C;
  --border-subtle: #1E284A;
  --border-focus: #38BDF8;
  --border-thick: 2px solid var(--border-color);

  /* Shadows & Offsets */
  --shadow-codecademy: 4px 4px 0px #080B17;
  --shadow-codecademy-yellow: 4px 4px 0px #FFD300;
  --shadow-codecademy-cyan: 4px 4px 0px #22D3EE;
  --shadow-glow: 0 0 20px rgba(56, 189, 248, 0.2);

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 9999px;

  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

[data-theme="light"] {
  --bg-main: #F4F6FB;
  --bg-sidebar: #E9EDF6;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFD;
  --bg-elevated: #EDF2FA;
  --bg-input: #FFFFFF;
  --bg-code: #1E2538;
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-inverse: #FFFFFF;

  --accent-yellow: #E6B800;
  --accent-yellow-dim: rgba(230, 184, 0, 0.15);
  
  --accent-cyan: #0284C7;
  --accent-cyan-dim: rgba(2, 132, 199, 0.12);
  
  --accent-purple: #7C3AED;
  --accent-purple-dim: rgba(124, 58, 237, 0.12);

  --accent-mint: #059669;
  --accent-mint-dim: rgba(5, 150, 105, 0.12);

  --accent-crimson: #E11D48;
  --accent-crimson-dim: rgba(225, 29, 72, 0.12);

  --border-color: #D1D9E7;
  --border-subtle: #E2E8F0;
  --border-focus: #0284C7;
  --shadow-codecademy: 4px 4px 0px #CBD5E1;
}

/* Reset & Global */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

/* Codecademy Layout Shell */
#app-root {
  display: flex;
  min-height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* Sidebar Backdrop Overlay */
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 18, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}
.sidebar-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* Sidebar Navigation */
.app-sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: var(--border-thick);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 1000;
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1), transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-x: hidden;
}

.sidebar-header {
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.sidebar-collapse-btn {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 13px;
  flex-shrink: 0;
}
.sidebar-collapse-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* Sidebar Mobile Hamburger Toggle */
.sidebar-mobile-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}
.sidebar-mobile-toggle:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Collapsed Desktop State */
.app-sidebar.collapsed {
  width: 72px;
}
.app-sidebar.collapsed .brand-info,
.app-sidebar.collapsed .nav-section-title,
.app-sidebar.collapsed .nav-label,
.app-sidebar.collapsed .nav-badge,
.app-sidebar.collapsed #sidebar-user-status,
.app-sidebar.collapsed .theme-btn-text {
  display: none !important;
}
.app-sidebar.collapsed .sidebar-header {
  padding: 16px 8px;
  justify-content: center;
}
.app-sidebar.collapsed .sidebar-collapse-btn span {
  display: inline-block;
  transform: rotate(180deg);
}
.app-sidebar.collapsed .nav-item {
  justify-content: center;
  padding: 12px 0;
}
.app-sidebar.collapsed .nav-item-left {
  gap: 0;
  justify-content: center;
}
.app-sidebar.collapsed .sidebar-footer {
  padding: 12px 6px;
}
.app-sidebar.collapsed .sidebar-footer > div {
  flex-direction: column;
}

.brand-logo {

.nav-item .nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.nav-badge {
  font-size: 10px;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: var(--radius-pill);
  font-weight: 700;
}

.nav-badge.danger {
  background: var(--accent-crimson-dim);
  color: var(--accent-crimson);
  border: 1px solid var(--accent-crimson);
}

.nav-badge.yellow {
  background: var(--accent-yellow-dim);
  color: var(--accent-yellow);
  border: 1px solid var(--accent-yellow);
}

/* Sidebar Footer / Clinic Status */
.sidebar-footer {
  padding: 14px 16px;
  border-top: var(--border-thick);
  background: var(--bg-sidebar);
}

.clinic-streak-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px;
  margin-bottom: 12px;
}

.streak-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.streak-score {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-mint);
}

.streak-bar-bg {
  height: 6px;
  background: var(--bg-input);
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.streak-bar-fill {
  height: 100%;
  width: 98%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-mint));
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

/* Sidebar Navigation Links */
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-y: auto;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding: 8px 12px 4px;
}

.nav-item {
  display: flex;
  align-items: center;

.breadcrumb-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.breadcrumb-tag .sep {
  color: var(--text-muted);
}

.breadcrumb-tag .active-crumb {
  color: var(--accent-cyan);
  font-weight: 700;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.quick-search-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quick-search-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.kbd-shortcut {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--accent-yellow);
}

/* View Container */
.view-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px 48px;
}

/* Animation utilities */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse-glow {
  animation: pulseGlow 2s infinite;
}






  height: 64px;
  background-color: var(--bg-sidebar);
  border-bottom: var(--border-thick);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  gap: 16px;
  flex-shrink: 0;
}
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-mint));
  border-radius: var(--radius-pill);
}

/* Main Content Workspace */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-main);
}

/* Top App Bar */
.top-bar {
  height: 64px;
  background-color: var(--bg-sidebar);
  border-bottom: var(--border-thick);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  gap: 16px;
  flex-shrink: 0;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.breadcrumb-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg-card);
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quick-search-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.kbd-shortcut {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--accent-yellow);
}

/* View Container */
.view-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px 48px;
}

/* Animation utilities */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
  font-size: 11px;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--accent-yellow);
}

/* View Container */
.view-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px 48px;
}

/* Animation utilities */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.pulse-glow {
  animation: pulseGlow 2s infinite;
}

/* ==========================================================================
   RESPONSIVE & MOBILE DESIGN SYSTEM RULES
   ========================================================================== */

/* Tablet & Mobile (<= 860px) */
@media (max-width: 860px) {
  .sidebar-mobile-toggle {
    display: flex;
  }

  .app-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 280px;
    max-width: 85vw;
    z-index: 1001;
    transform: translateX(-100%);
    box-shadow: none;
  }

  .app-sidebar.mobile-open {
    transform: translateX(0);
    box-shadow: 12px 0 36px rgba(0, 0, 0, 0.7);
  }

  .app-sidebar.collapsed {
    width: 280px;
  }
  .app-sidebar.collapsed .brand-info,
  .app-sidebar.collapsed .nav-section-title,
  .app-sidebar.collapsed .nav-label,
  .app-sidebar.collapsed .nav-badge,
  .app-sidebar.collapsed #sidebar-user-status,
  .app-sidebar.collapsed .theme-btn-text {
    display: block !important;
  }
  .app-sidebar.collapsed .sidebar-header {
    padding: 18px 16px;
    justify-content: space-between;
  }
  .app-sidebar.collapsed .nav-item {
    justify-content: space-between;
    padding: 10px 14px;
  }
  .app-sidebar.collapsed .nav-item-left {
    gap: 10px;
  }

  .sidebar-collapse-btn {
    display: none;
  }

  #app-root {
    width: 100vw;
    overflow-x: hidden;
  }

  .app-main {
    width: 100vw;
    height: 100vh;
  }

  .top-bar {
    padding: 0 12px;
    height: 56px;
    gap: 6px;
  }

  .top-bar-left {
    gap: 8px;
    min-width: 0;
    flex-shrink: 1;
  }

  .crumb-prefix, .breadcrumb-tag .sep {
    display: none;
  }

  .breadcrumb-tag {
    padding: 4px 8px;
    font-size: 11px;
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .cloud-sync-indicator {
    display: none;
  }

  .top-bar-right {
    gap: 6px;
    flex-shrink: 0;
  }

  .quick-search-btn {
    padding: 6px 10px;
  }
  .quick-search-btn .search-btn-text,
  .quick-search-btn .kbd-shortcut {
    display: none;
  }

  .btn-text-responsive {
    display: none;
  }

  .auth-btn-text {
    display: none;
  }

  .view-container {
    padding: 14px 10px 48px;
  }
}

/* Phone Screen (<= 640px) */
@media (max-width: 640px) {
  .breadcrumb-tag {
    max-width: 110px;
  }
  .breadcrumb-tag .active-crumb {
    overflow: hidden;
    text-overflow: ellipsis;