/* Modern Glassmorphism & Responsive Expense Tracker Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Color Palette - Premium Dark Theme */
  --bg-primary: #0a0e1a;
  --bg-secondary: rgba(20, 26, 46, 0.6);
  --bg-sidebar: rgba(13, 20, 38, 0.95);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent-primary: #6366f1; /* Indigo */
  --accent-success: #10b981; /* Emerald */
  --accent-danger: #f43f5e;  /* Rose */
  --accent-warning: #f59e0b; /* Amber */
  --accent-info: #0ea5e9;    /* Sky */

  /* Category colors */
  --color-food: #f97316;
  --color-transport: #3b82f6;
  --color-bills: #10b981;
  --color-entertainment: #8b5cf6;
  --color-shopping: #ec4899;
  --color-health: #ef4444;
  --color-others: #64748b;

  --font-sans: 'Outfit', sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-blur: blur(16px);
}

/* Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(244, 63, 94, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Layout Components */
.app-container {
  display: flex;
  width: 100vw;
  min-height: 100vh;
}

/* Desktop Sidebar Styles */
.sidebar {
  width: 280px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  backdrop-filter: var(--glass-blur);
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: var(--transition);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
  padding-left: 0.5rem;
}

.brand-icon {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-info));
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-primary), #a5b4fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid transparent;
}

.nav-item a:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
  border-color: var(--border-color);
  transform: translateX(5px);
}

.nav-item.active a {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0.02) 100%);
  color: var(--text-primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-weight: 600;
}

.nav-item i {
  font-size: 1.25rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.nav-item.active i {
  color: var(--accent-primary);
}

.sidebar-footer {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #4f46e5, #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #fff;
  border: 2px solid var(--border-color);
}

.profile-info {
  display: flex;
  flex-direction: column;
}

.username {
  font-weight: 600;
  font-size: 0.9rem;
}

.user-role {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Mobile Bottom Navbar (Hidden on Desktop) */
.mobile-nav {
  display: none;
}

/* Main Content Area */
.main-content {
  flex-grow: 1;
  margin-left: 280px;
  padding: 2.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  width: calc(100% - 280px);
}

/* Header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.welcome-section h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.welcome-section p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

.header-actions {
  display: flex;
  gap: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
  color: #fff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-danger);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
  background: rgba(244, 63, 94, 0.25);
  transform: scale(1.02);
}

/* Cards & Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}

.stat-card.today::after { background: var(--accent-info); }
.stat-card.month::after { background: var(--accent-success); }
.stat-card.avg::after { background: var(--accent-warning); }
.stat-card.balance::after { background: var(--accent-primary); }
.stat-card.expense::after { background: var(--accent-danger); }

.stat-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
}

.stat-icon-wrapper {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.stat-card.today .stat-icon-wrapper { color: var(--accent-info); }
.stat-card.month .stat-icon-wrapper { color: var(--accent-success); }
.stat-card.avg .stat-icon-wrapper { color: var(--accent-warning); }
.stat-card.balance .stat-icon-wrapper { color: var(--accent-primary); }
.stat-card.expense .stat-icon-wrapper { color: var(--accent-danger); }

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-value {
  font-size: 1.65rem;
  font-weight: 700;
  margin-top: 0.25rem;
}

/* Dashboard Section Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
}

.section-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.section-title {
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title i {
  color: var(--accent-primary);
}

/* List Item Styles */
.expense-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.expense-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.expense-item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-hover);
  transform: scale(1.01);
}

.expense-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.category-badge-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
}

/* Category colors definition */
.cat-food { background: linear-gradient(135deg, var(--color-food), #ea580c); box-shadow: 0 4px 10px rgba(249, 115, 22, 0.2); }
.cat-transport { background: linear-gradient(135deg, var(--color-transport), #2563eb); box-shadow: 0 4px 10px rgba(59, 130, 246, 0.2); }
.cat-bills { background: linear-gradient(135deg, var(--color-bills), #059669); box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2); }
.cat-entertainment { background: linear-gradient(135deg, var(--color-entertainment), #7c3aed); box-shadow: 0 4px 10px rgba(139, 92, 246, 0.2); }
.cat-shopping { background: linear-gradient(135deg, var(--color-shopping), #db2777); box-shadow: 0 4px 10px rgba(236, 72, 153, 0.2); }
.cat-health { background: linear-gradient(135deg, var(--color-health), #dc2626); box-shadow: 0 4px 10px rgba(239, 68, 68, 0.2); }
.cat-others { background: linear-gradient(135deg, var(--color-others), #475569); box-shadow: 0 4px 10px rgba(100, 116, 139, 0.2); }

.expense-meta {
  display: flex;
  flex-direction: column;
}

.expense-title {
  font-weight: 600;
  font-size: 1rem;
}

.expense-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.expense-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.expense-amount {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-danger);
}

.btn-delete-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-delete-icon:hover {
  color: var(--accent-danger);
  background: rgba(244, 63, 94, 0.1);
}

/* Filter Section styles */
.filter-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)) auto;
  gap: 1rem;
  align-items: flex-end;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  width: 100%;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Modal / Slide-up Drawer Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: #0f172a;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 500px;
  max-width: 95%;
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.modal-overlay.open .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-weight: 700;
  font-size: 1.25rem;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
}

.modal-body form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-secondary);
}

.empty-state i {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Notifications */
.notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1e293b;
  border: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 2000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.notification.show {
  transform: translateY(0);
  opacity: 1;
}

.notification.success {
  border-left: 4px solid var(--accent-success);
}
.notification.success i { color: var(--accent-success); }

.notification.error {
  border-left: 4px solid var(--accent-danger);
}
.notification.error i { color: var(--accent-danger); }

/* Reports Page specifics */
.charts-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 1.5rem;
}

.chart-container {
  position: relative;
  height: 300px;
  width: 100%;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  /* Hide sidebar on mobile */
  .sidebar {
    transform: translateX(-100%);
    width: 0;
    padding: 0;
    border: none;
  }
  
  .main-content {
    margin-left: 0;
    width: 100%;
    padding: 1.5rem;
    padding-bottom: 90px; /* Space for bottom navbar */
  }

  .welcome-section h1 {
    font-size: 1.5rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .filter-form {
    grid-template-columns: 1fr;
  }

  /* Show Bottom Navigation */
  .mobile-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    z-index: 999;
    padding: 0.5rem 1rem;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
  }

  .mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 500;
    gap: 0.25rem;
    flex: 1;
    height: 100%;
    transition: var(--transition);
  }

  .mobile-nav-item i {
    font-size: 1.25rem;
    transition: var(--transition);
  }

  .mobile-nav-item.active {
    color: var(--accent-primary);
    font-weight: 600;
  }

  .mobile-nav-item.active i {
    transform: translateY(-2px);
  }

  /* Highlight Center Add button */
  .mobile-nav-item.add-btn-center {
    position: relative;
    top: -20px;
    background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
    color: #fff;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.5);
    flex: none;
    border: 4px solid var(--bg-primary);
  }

  .mobile-nav-item.add-btn-center i {
    font-size: 1.5rem;
  }

  .mobile-nav-item.add-btn-center.active {
    color: #fff;
  }

  /* Slide-up Drawer on Mobile for Add Form */
  .modal-overlay {
    align-items: flex-end;
  }

  .modal-overlay.open .modal-content {
    animation: slideUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.1) forwards;
  }

  .modal-content {
    width: 100%;
    max-width: 100%;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
    border-bottom: none;
  }

  @keyframes slideUp {
    from {
      transform: translateY(100%);
    }
    to {
      transform: translateY(0);
    }
  }
}

/* Transaction Type Toggle (Segmented Control) */
.transaction-type-toggle {
  display: flex;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
  position: relative;
}

.type-toggle-btn {
  flex: 1;
  text-align: center;
  padding: 0.65rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: calc(var(--radius-md) - 4px);
  transition: var(--transition);
  color: var(--text-secondary);
  border: none;
  background: none;
}

.type-toggle-btn.active[data-type="expense"] {
  background: rgba(244, 63, 94, 0.2);
  color: var(--accent-danger);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.type-toggle-btn.active[data-type="income"] {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Category colors definition for Income */
:root {
  --color-salary: #10b981;
  --color-investment: #0ea5e9;
  --color-business: #f59e0b;
}

.cat-salary { 
  background: linear-gradient(135deg, var(--color-salary), #059669); 
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2); 
}
.cat-investment { 
  background: linear-gradient(135deg, var(--color-investment), #0284c7); 
  box-shadow: 0 4px 10px rgba(14, 165, 233, 0.2); 
}
.cat-business { 
  background: linear-gradient(135deg, var(--color-business), #d97706); 
  box-shadow: 0 4px 10px rgba(245, 158, 11, 0.2); 
}

/* Amount colors */
.amount-income {
  color: var(--accent-success) !important;
}
.amount-expense {
  color: var(--accent-danger) !important;
}

/* Auth Pages (Login & Register) */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  min-height: 100vh;
  padding: 1.5rem;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(244, 63, 94, 0.1) 0px, transparent 50%);
  background-attachment: fixed;
}

.auth-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 420px;
  max-width: 100%;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.auth-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.auth-header .brand {
  margin-bottom: 0.5rem;
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.auth-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.auth-links {
  font-size: 0.85rem;
  text-align: center;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.auth-links a {
  color: var(--accent-primary);
  font-weight: 600;
  transition: var(--transition);
}

.auth-links a:hover {
  text-decoration: underline;
}

/* Logout Button */
.btn-logout {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.btn-logout:hover {
  color: var(--accent-danger);
  background: rgba(244, 63, 94, 0.1);
}