/* ==========================================================================
   License Management System - Main Stylesheet
   Vanilla CSS (converted from TailwindCSS)
   ========================================================================== */

/* ==========================================================================
   CSS Variables (Design Tokens)
   ========================================================================== */
:root {
  /* Colors */
  --primary: #135bec;
  --primary-hover: #1047c0;
  --primary-light: rgba(19, 91, 236, 0.1);
  --primary-shadow: rgba(19, 91, 236, 0.2);

  /* Background */
  --bg-light: #f6f6f8;
  --bg-dark: #101622;
  --surface-dark: #1c1f27;
  --surface-light: #ffffff;
  --input-dark: #282e39;

  /* Borders */
  --border-dark: #3b4354;
  --border-light: #e2e8f0;

  /* Text */
  --text-primary: #ffffff;
  --text-secondary: #9da6b9;
  --text-muted: #58627a;

  /* Status Colors */
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --error: #ef4444;
  --error-light: rgba(239, 68, 68, 0.1);
  --info: #3b82f6;
  --info-light: rgba(59, 130, 246, 0.1);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-primary: 0 4px 14px 0 rgba(19, 91, 236, 0.25);

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --sidebar-width: 260px;
  --header-height: 64px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--border-dark);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: #4b5563;
}

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

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--surface-dark);
  border-right: 1px solid var(--border-dark);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--spacing-md);
  flex-shrink: 0;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.sidebar-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.25rem;
}

.sidebar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Navigation */
.nav-menu {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: 0.625rem var(--spacing-md);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  font-weight: 500;
}

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

.nav-item.active {
  background-color: var(--primary);
  color: white;
  box-shadow: var(--shadow-primary);
}

.nav-item .icon {
  font-size: 20px;
}

/* Sidebar Footer */
.sidebar-footer {
  border-top: 1px solid var(--border-dark);
  padding-top: var(--spacing-md);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.user-name {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
}

.user-email {
  font-size: 0.625rem;
  color: var(--text-secondary);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: rgba(16, 22, 34, 0.5);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  position: sticky;
  top: 0;
  z-index: 50;
  gap: var(--spacing-md);
}

.header-title {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.header-title h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

.header-title p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

/* Page Content */
.page-content {
  flex: 1;
  padding: var(--spacing-lg);
  overflow-y: auto;
}

/* ==========================================================================
   Components
   ========================================================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0 var(--spacing-md);
  height: 40px;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

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

.btn-secondary:hover {
  background-color: var(--input-dark);
}

.btn-danger {
  background-color: var(--error-light);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background-color: rgba(239, 68, 68, 0.2);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  background: transparent;
}

.btn-icon:hover {
  background-color: var(--surface-dark);
  color: var(--text-primary);
}

/* Cards */
.card {
  background-color: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

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

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

/* Stat Cards */
.stat-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background-color: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
}

.stat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.stat-icon {
  font-size: 24px;
}

.stat-value {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-change {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: 500;
}

.stat-change.positive {
  color: var(--success);
}

.stat-change.negative {
  color: var(--error);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1200px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

/* Tables */
.table-container {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.table th {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  background-color: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--border-dark);
}

.table td {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border-dark);
}

.table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-success {
  background-color: var(--success-light);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning {
  background-color: var(--warning-light);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-error {
  background-color: var(--error-light);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-info {
  background-color: var(--info-light);
  color: var(--info);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: currentColor;
}

/* Forms */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.form-input {
  height: 44px;
  padding: 0 var(--spacing-md);
  background-color: var(--input-dark);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%239da6b9' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-textarea {
  min-height: 100px;
  padding: var(--spacing-md);
  resize: vertical;
}

/* Search Input */
.search-input {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.search-input .icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 20px;
}

.search-input input {
  width: 100%;
  padding-left: 44px;
}

/* Progress Bar */
.progress-bar {
  height: 6px;
  background-color: var(--border-dark);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar .progress {
  height: 100%;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  transition: width var(--transition-slow);
}

.progress-bar.success .progress {
  background-color: var(--success);
}
.progress-bar.warning .progress {
  background-color: var(--warning);
}
.progress-bar.error .progress {
  background-color: var(--error);
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-dark);
  background-color: rgba(0, 0, 0, 0.1);
}

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

.pagination-buttons {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pagination-btn {
  min-width: 32px;
  height: 32px;
  padding: 0 var(--spacing-sm);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: transparent;
  border: 1px solid var(--border-dark);
  transition: all var(--transition-fast);
}

.pagination-btn:hover {
  background-color: var(--surface-dark);
}

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

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  background-color: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-fast);
}

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

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

.modal-title {
  font-size: 1.125rem;
  font-weight: 700;
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-dark);
}

/* Loading Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-dark);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Utility Classes */
.text-primary {
  color: var(--primary);
}
.text-secondary {
  color: var(--text-secondary);
}
.text-success {
  color: var(--success);
}
.text-warning {
  color: var(--warning);
}
.text-error {
  color: var(--error);
}

.font-mono {
  font-family: var(--font-mono);
}
.font-bold {
  font-weight: 700;
}
.font-medium {
  font-weight: 500;
}

.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-sm {
  gap: var(--spacing-sm);
}
.gap-md {
  gap: var(--spacing-md);
}
.gap-lg {
  gap: var(--spacing-lg);
}

.hidden {
  display: none;
}
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Responsive */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }
}