/* ===== TAHSILAT CLIENT - ANA CSS ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --info-color: #06b6d4;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-dark: #0f172a;
  
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-light: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-medium: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-large: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;
  
  --transition: all 0.2s ease-in-out;
  --transition-slow: all 0.3s ease-in-out;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 400;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.container-fluid {
  width: 100%;
  padding: 0 1rem;
}

/* ===== HEADER ===== */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-light);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  text-decoration: none;
}

.logo:hover {
  color: var(--primary-dark);
  text-decoration: none;
}

.logo img {
  height: 2rem;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  background-color: var(--bg-tertiary);
  text-decoration: none;
}

.user-dropdown {
  position: relative;
}

.user-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--primary-color);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.user-avatar:hover {
  background: var(--primary-dark);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  min-height: calc(100vh - 80px);
  padding: 2rem 0;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-light);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-medium);
}

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

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0.25rem 0 0 0;
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

/* ===== GRID SYSTEM ===== */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  min-height: 2.75rem;
  text-align: center;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--text-white);
  text-decoration: none;
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  text-decoration: none;
}

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

.btn-warning {
  background: var(--warning-color);
  color: var(--text-white);
  border-color: var(--warning-color);
}

.btn-error {
  background: var(--error-color);
  color: var(--text-white);
  border-color: var(--error-color);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
  min-height: 3.25rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  min-height: 2.25rem;
}

.btn-full {
  width: 100%;
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: var(--transition);
  min-height: 2.75rem;
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control.error {
  border-color: var(--error-color);
}

.form-control.success {
  border-color: var(--success-color);
}

.form-error {
  color: var(--error-color);
  font-size: 0.75rem;
  margin-top: 0.25rem;
  display: block;
}

.form-help {
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

/* ===== STATS CARDS ===== */
.stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-2px);
}

.stat-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.25rem;
}

.stat-icon.primary {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-color);
}

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

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

.stat-icon.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
}

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

/* ===== TABLES ===== */
.table-container {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

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

.table th,
.table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.table td {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
}

.badge-primary {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-color);
}

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

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

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

.badge-secondary {
  background: rgba(100, 116, 139, 0.1);
  color: var(--secondary-color);
}

/* ===== ALERTS ===== */
.alert {
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--success-color);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.2);
  color: var(--warning-color);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.2);
  color: var(--error-color);
}

.alert-info {
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.2);
  color: var(--info-color);
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-error { color: var(--error-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--bg-secondary) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.5rem !important; }
.mt-2 { margin-top: 1rem !important; }
.mt-3 { margin-top: 1.5rem !important; }
.mt-4 { margin-top: 2rem !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.5rem !important; }
.mb-2 { margin-bottom: 1rem !important; }
.mb-3 { margin-bottom: 1.5rem !important; }
.mb-4 { margin-bottom: 2rem !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 0.5rem !important; }
.p-2 { padding: 1rem !important; }
.p-3 { padding: 1.5rem !important; }
.p-4 { padding: 2rem !important; }

.rounded { border-radius: var(--border-radius) !important; }
.rounded-lg { border-radius: var(--border-radius-lg) !important; }
.rounded-xl { border-radius: var(--border-radius-xl) !important; }

.shadow-light { box-shadow: var(--shadow-light) !important; }
.shadow-medium { box-shadow: var(--shadow-medium) !important; }
.shadow-large { box-shadow: var(--shadow-large) !important; }

.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.gap-1 { gap: 0.5rem !important; }
.gap-2 { gap: 1rem !important; }
.gap-3 { gap: 1.5rem !important; }
.gap-4 { gap: 2rem !important; }

/* ===== LOADING ===== */
.loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .container {
    padding: 0 0.75rem;
  }
  
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    width: 100%;
  }
  
  .main-content {
    padding: 1rem 0;
  }
  
  .card-header,
  .card-body,
  .card-footer {
    padding: 1rem;
  }
  
  .btn {
    min-width: auto;
  }
  
  .table-container {
    overflow-x: auto;
  }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

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

.slide-in {
  animation: slideIn 0.3s ease-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.shake-animation {
  animation: shake 0.5s ease-in-out;
}

/* ===== SECURITY TOAST ===== */
.security-toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--warning-color);
  color: white;
  padding: 1rem;
  border-radius: var(--border-radius);
  z-index: 10000;
  animation: fadeIn 0.3s ease;
  max-width: 300px;
  word-wrap: break-word;
}