/* ============================================
   MODERN SAAS PLATFORM - DESIGN SYSTEM
   Premium UI/UX with Dark/Light Mode Support
   ============================================ */

/* IMPORT GOOGLE FONTS */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ============================================
   CSS VARIABLES - COLOR PALETTE
   ============================================ */

:root {
  /* Light Mode */
  --bg-primary: #F6F7FB;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F0F3FF;
  --text-primary: #1E1E2F;
  --text-secondary: #5C5C7B;
  --text-light: #9B9BAF;
  --border-color: #E8E8F0;
  
  /* Gradient Theme */
  --gradient-primary: linear-gradient(135deg, #6E3FF3 0%, #4BC8FF 100%);
  --gradient-secondary: linear-gradient(135deg, #FF7CE0 0%, #6E3FF3 100%);
  --gradient-accent: linear-gradient(135deg, #00D1FF 0%, #6E3FF3 100%);
  
  /* Solid Colors */
  --color-primary: #6E3FF3;
  --color-secondary: #4BC8FF;
  --color-accent: #00D1FF;
  --color-accent-pink: #FF7CE0;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-glow: 0 0 30px rgba(110, 63, 243, 0.2);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-primary: #12121A;
  --bg-secondary: #1E1E2F;
  --bg-tertiary: #2A2A3E;
  --text-primary: #F0F0FF;
  --text-secondary: #B8B8CC;
  --text-light: #8B8B9F;
  --border-color: #3A3A4E;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
  line-height: 1.6;
  font-weight: 400;
  font-size: 15px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1rem;
  font-weight: 600;
}

h6 {
  font-size: 0.875rem;
  font-weight: 600;
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-secondary);
}

.nav-menu {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  list-style: none;
}

/* Hide mobile toggler on desktop by default */
.navbar-toggler { display: none; }

.nav-actions { display: flex; align-items: center; gap: var(--space-md); }

.left-controls { display: flex; align-items: center; gap: var(--space-md); }

.nav-menu-list {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu-list .nav-link {
  margin: 0;
}

/* Mobile Menu */
@media (max-width: 768px) {
  .navbar-toggler {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    color: var(--text-primary);
  }

  .nav-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    gap: 0;
    align-items: stretch;
    z-index: 999;
    padding: var(--space-lg) 0;
    box-shadow: var(--shadow-md);
  }

  .nav-menu.show {
    display: flex;
  }

  .nav-menu-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-menu-list li {
    padding: 0;
  }

  .nav-menu-list .nav-link {
    display: block;
    padding: var(--space-md) var(--space-lg);
    margin: 0;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-menu-list .nav-link:last-child {
    border-bottom: none;
  }
}

/* Collapsed sidebar (desktop) */
@media (min-width: 769px) {
  .sidebar.collapsed {
    width: 80px;
  }
  .sidebar.collapsed .sidebar-item { justify-content: center; }
  .sidebar.collapsed .sidebar-item > *:not(.sidebar-icon) { display: none; }
}



[data-theme="dark"] .navbar {
  background: rgba(30, 30, 47, 0.95);
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
  margin: 0 var(--space-md);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--color-primary);
}

.navbar-toggler {
  border: none;
  color: var(--text-primary);
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(110, 63, 243, 0.1);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: rgba(110, 63, 243, 0.2);
  box-shadow: var(--shadow-glow);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  font-weight: 500;
  border-radius: var(--radius-lg);
  padding: 0.75rem 1.5rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

.btn:focus {
  outline: none;
}

/* Primary Button - Gradient */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

/* Secondary Button - Outline */
.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

/* Success Button */
.btn-success {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Danger Button */
.btn-danger {
  background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Small Button */
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Large Button */
.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* Button with Icon */
.btn-icon {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .card-glass {
  background: rgba(30, 30, 47, 0.7);
  border: 1px solid rgba(110, 63, 243, 0.1);
}

.card-body {
  padding: var(--space-lg);
}

.card-header {
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 1.1rem;
}

.card-footer {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  border-top: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: var(--space-lg);
}

label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(110, 63, 243, 0.1);
}

.form-control::placeholder {
  color: var(--text-light);
}

/* Floating Label */
.form-floating {
  position: relative;
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-lg);
}

.form-floating > .form-control {
  padding-top: 1.5rem;
  padding-bottom: 0.5rem;
}

.form-floating > label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 1rem;
  margin-bottom: 0;
  pointer-events: none;
  color: var(--text-light);
  font-weight: 400;
  transition: all var(--transition-fast);
}

.form-control:focus ~ label,
.form-control:not(:placeholder-shown) ~ label {
  top: -10px;
  left: 10px;
  font-size: 0.85rem;
  color: var(--color-primary);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

select.form-control {
  cursor: pointer;
}

/* Form Validation */
.is-invalid {
  border-color: #EF4444;
}

.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.invalid-feedback {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: #EF4444;
}

/* ============================================
   TABLES
   ============================================ */

.table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-lg);
}

.table thead {
  background-color: var(--bg-tertiary);
  border-bottom: 2px solid var(--border-color);
}

.table thead th {
  padding: 1rem;
  font-weight: 600;
  text-align: left;
  color: var(--text-primary);
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

.table tbody td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.table tbody tr {
  transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
  background-color: var(--bg-tertiary);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* Responsive Table */
@media (max-width: 768px) {
  .table-responsive {
    overflow-x: auto;
  }
}

/* ============================================
   MODALS
   ============================================ */

.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn var(--transition-base);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 90%;
  padding: var(--space-2xl);
  animation: slideUp var(--transition-base);
}

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

.modal-body {
  margin-bottom: var(--space-lg);
}

.modal-footer {
  display: flex;
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-light);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
  padding: 1rem var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  border-left: 4px solid;
  animation: slideDown var(--transition-base);
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border-left-color: #10B981;
  color: #047857;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.1);
  border-left-color: #EF4444;
  color: #DC2626;
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-left-color: #F59E0B;
  color: #D97706;
}

.alert-info {
  background-color: rgba(59, 130, 246, 0.1);
  border-left-color: #3B82F6;
  color: #1D4ED8;
}

.alert-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: inherit;
  transition: color var(--transition-fast);
}

.alert-close:hover {
  color: var(--text-primary);
}

/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: rgba(110, 63, 243, 0.2);
  color: var(--color-primary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.2);
  color: #047857;
}

.badge-danger {
  background: rgba(239, 68, 68, 0.2);
  color: #DC2626;
}

.badge-warning {
  background: rgba(245, 158, 11, 0.2);
  color: #D97706;
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
  display: flex;
  gap: var(--space-sm);
  list-style: none;
  margin-bottom: var(--space-lg);
}

.pagination-item {
  display: inline-block;
}

.pagination-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.pagination-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination-link.active {
  background: var(--gradient-primary);
  color: white;
  border-color: var(--color-primary);
}

/* ============================================
   BREADCRUMBS
   ============================================ */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  list-style: none;
  font-size: 0.9rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item::after {
  content: '/';
  margin-left: var(--space-sm);
  color: var(--text-light);
}

.breadcrumb-item:last-child::after {
  content: '';
  margin-left: 0;
}

.breadcrumb-item.active {
  color: var(--text-light);
}

.breadcrumb-link {
  color: var(--color-primary);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-section {
  margin-bottom: var(--space-xl);
}

.footer-title {
  font-weight: 600;
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.footer-link {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-lg);
  margin-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes glow {
  0%, 100% {
    box-shadow: var(--shadow-glow);
  }
  50% {
    box-shadow: 0 0 50px rgba(110, 63, 243, 0.3);
  }
}

/* Fade In on Scroll (AOS-like) */
[data-aos] {
  opacity: 0;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

[data-aos].aos-animate {
  opacity: 1;
}

[data-aos="fade-up"] {
  transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
  transform: translateY(0);
}

[data-aos="fade-down"] {
  transform: translateY(-30px);
}

[data-aos="fade-down"].aos-animate {
  transform: translateY(0);
}

[data-aos="zoom-in"] {
  transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
  transform: scale(1);
}

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

.sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--space-lg) 0;
  min-height: 100vh;
  transition: all var(--transition-base);
}

.sidebar-item {
  padding: var(--space-md) var(--space-lg);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
  border-left: 3px solid transparent;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.sidebar-item:hover {
  background-color: var(--bg-tertiary);
  color: var(--color-primary);
}

.sidebar-item.active {
  background-color: rgba(110, 63, 243, 0.1);
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.sidebar-icon {
  width: 20px;
  height: 20px;
}

/* Mobile Sidebar */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -100%;
    top: 70px;
    width: 250px;
    height: calc(100vh - 70px);
    z-index: 999;
    border-right: 1px solid var(--border-color);
    transition: left var(--transition-base);
  }

  .sidebar.show {
    left: 0;
  }
}

/* ============================================
   GRID & LAYOUT
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.col {
  min-width: 0;
}

.col-1 { grid-column: 1; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 2; }
.col-12 { grid-column: 1 / -1; }

/* Bootstrap Grid Compatibility */
@media (min-width: 768px) {
  .col-md-1 { grid-column: span 1; }
  .col-md-2 { grid-column: span 2; }
  .col-md-3 { grid-column: span 3; }
  .col-md-4 { grid-column: span 4; }
  .col-md-6 { grid-column: span 6; }
  .col-md-12 { grid-column: span 12; }
}

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

@media (max-width: 1024px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.35rem; }
}

@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }
  
  .row {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  .btn {
    width: 100%;
  }
  
  .nav-link {
    margin: var(--space-sm) 0;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1rem; }
  
  .card {
    padding: var(--space-md);
  }
  
  .btn {
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.mt { margin-top: var(--space-lg); }
.mb { margin-bottom: var(--space-lg); }
.mx { margin-left: auto; margin-right: auto; }
.p { padding: var(--space-lg); }
.text-center { text-align: center; }
.text-muted { color: var(--text-light); }
.text-primary { color: var(--color-primary); }
.bg-gradient { background: var(--gradient-primary); }
.rounded { border-radius: var(--radius-lg); }
.shadow { box-shadow: var(--shadow-md); }
.d-flex { display: flex; }
.gap { gap: var(--space-md); }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.opacity-50 { opacity: 0.5; }
.cursor-pointer { cursor: pointer; }
.hidden { display: none; }
.invisible { visibility: hidden; }