/* 
 * ProjectFlow - Main Stylesheet
 * Modern, responsive design with dark theme
 */

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

/* ==================== RESET & BASE ==================== */

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ==================== LAYOUT ==================== */

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

.app-wrapper {
  display: flex;
  min-height: 100vh;
}

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

.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--gray-700);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-blue);
  text-align: center;
  padding: var(--space-md);
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.nav-item {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

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

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

.user-profile {
  margin-top: auto;
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-blue);
}

/* ==================== MAIN CONTENT ==================== */

.main-content {
  flex: 1;
  padding: var(--space-xl);
  overflow-y: auto;
}

.page-header {
  margin-bottom: var(--space-xl);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.page-subtitle {
  color: var(--text-tertiary);
}

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

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
}

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

.btn {
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

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

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

.btn-success {
  background: var(--success-green);
  color: white;
}

.btn-danger {
  background: var(--danger-red);
  color: white;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.75rem;
}

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

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

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(91, 143, 255, 0.1);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

/* ==================== GRID ==================== */

.grid {
  display: grid;
  gap: var(--space-lg);
}

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

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

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

/* ==================== STATS ==================== */

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-blue);
  margin-bottom: var(--space-sm);
}

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

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

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

.table thead {
  background: var(--bg-tertiary);
}

.table th,
.table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--gray-700);
}

.table th {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

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

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

.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-green);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning-yellow);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger-red);
}

.badge-info {
  background: rgba(59, 130, 246, 0.1);
  color: var(--info-blue);
}

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

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

/* ==================== NOTIFICATIONS ==================== */

.notification {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
  z-index: var(--z-tooltip);
  animation: slideIn 0.3s ease;
}

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

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

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

/* ==================== LOGIN PAGE ==================== */

.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-xl);
}

.login-logo {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.login-logo h1 {
  font-size: 2rem;
  color: var(--primary-blue);
  margin-bottom: var(--space-sm);
}

.login-logo p {
  color: var(--text-tertiary);
}

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

@media (max-width: 768px) {
  .app-wrapper {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--gray-700);
  }
  
  .main-content {
    padding: var(--space-lg);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ==================== UTILITIES ==================== */

.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--space-lg);
}

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

.flex {
  display: flex;
}

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

.gap-md {
  gap: var(--space-md);
}

.loading {
  opacity: 0.5;
  pointer-events: none;
}