/* ============================================================
   BELTAŞ e-Bordro Sistemi - Modern UI
   Renk Paleti: Koyu Mavi #1e3a5f, Mavi #2c5aa0, Açık #f5f7fa
   ============================================================ */

:root {
  --primary: #1e3a5f;
  --primary-light: #2c5aa0;
  --primary-dark: #152a45;
  --accent: #3498db;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --white: #ffffff;
  --shadow: 0 2px 15px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
  min-height: 100vh;
  color: var(--gray-800);
  line-height: 1.6;
}

/* ============ LAYOUT ============ */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  padding: 30px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ============ HEADER ============ */
.header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: 0;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 15px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 15px;
}

.header-logo {
  height: 50px;
  width: auto;
}

.header-title {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.header-subtitle {
  font-size: 0.85rem;
  opacity: 0.85;
  font-weight: 400;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 20px;
}

.user-info {
  text-align: right;
}

.user-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.user-role {
  font-size: 0.8rem;
  opacity: 0.8;
}

.btn-logout {
  background: rgba(255,255,255,0.15);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-logout:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-1px);
}

/* ============ LOGIN PAGE ============ */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--accent) 100%);
}

.login-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  overflow: hidden;
}

.login-header {
  background: var(--primary);
  padding: 40px 30px;
  text-align: center;
}

.login-logo {
  height: 70px;
  margin-bottom: 15px;
}

.login-title {
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 5px;
}

.login-subtitle {
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
}

.login-body {
  padding: 40px 30px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--white);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(44, 90, 160, 0.1);
}

.form-control::placeholder {
  color: var(--gray-500);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  width: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(30, 58, 95, 0.3);
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--gray-700);
}

.btn-secondary:hover {
  background: var(--gray-300);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #2ecc71 100%);
  color: var(--white);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(39, 174, 96, 0.3);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #c0392b 100%);
  color: var(--white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
}

/* ============ ALERTS ============ */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.alert-danger {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-success {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.alert-warning {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid #fde68a;
}

.alert-info {
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
}

/* ============ CARDS ============ */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 24px;
}

.card-header {
  background: var(--gray-100);
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-body {
  padding: 24px;
}

/* ============ PAYSLIP LIST ============ */
.payslip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.payslip-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}

.payslip-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.payslip-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.payslip-period {
  font-size: 1.4rem;
  font-weight: 700;
}

.payslip-year {
  font-size: 0.9rem;
  opacity: 0.9;
}

.payslip-icon {
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.payslip-body {
  padding: 20px;
}

.payslip-info {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray-600);
  font-size: 0.9rem;
  margin-bottom: 15px;
}

.payslip-actions {
  display: flex;
  gap: 10px;
}

.payslip-actions .btn {
  flex: 1;
  padding: 12px 16px;
}

/* ============ PDF VIEWER ============ */
.pdf-viewer-container {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.pdf-toolbar {
  background: var(--gray-100);
  padding: 15px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--gray-200);
  flex-wrap: wrap;
  gap: 15px;
}

.pdf-title {
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pdf-actions {
  display: flex;
  gap: 10px;
}

.pdf-frame {
  width: 100%;
  height: calc(100vh - 250px);
  min-height: 600px;
  border: none;
}

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

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

.table th,
.table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.table th {
  background: var(--gray-100);
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table tr:hover {
  background: var(--gray-100);
}

.table .actions {
  display: flex;
  gap: 8px;
}

/* ============ ADMIN DASHBOARD ============ */
.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
}

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

.stat-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-icon.blue { background: #e3f2fd; color: #1976d2; }
.stat-icon.green { background: #e8f5e9; color: #388e3c; }
.stat-icon.orange { background: #fff3e0; color: #f57c00; }
.stat-icon.purple { background: #f3e5f5; color: #7b1fa2; }

.stat-content h3 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-800);
  line-height: 1;
}

.stat-content p {
  color: var(--gray-600);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ============ NAV MENU (Admin) ============ */
.nav-menu {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--white);
  color: var(--gray-700);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: var(--transition);
  box-shadow: var(--shadow);
  border: 2px solid transparent;
}

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

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

/* ============ FORMS ============ */
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.form-select {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--white);
  cursor: pointer;
  transition: var(--transition);
}

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

.file-upload {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-sm);
  padding: 40px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}

.file-upload:hover {
  border-color: var(--primary-light);
  background: var(--gray-100);
}

.file-upload-icon {
  font-size: 3rem;
  color: var(--gray-400);
  margin-bottom: 15px;
}

.file-upload-text {
  color: var(--gray-600);
}

.file-upload input[type="file"] {
  display: none;
}

/* ============ 2FA ============ */
.twofa-container {
  max-width: 500px;
  margin: 0 auto;
}

.qr-code {
  text-align: center;
  padding: 30px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.qr-code img {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.secret-key {
  background: var(--gray-800);
  color: #00ff00;
  padding: 15px 20px;
  border-radius: var(--radius-sm);
  font-family: 'Courier New', monospace;
  font-size: 1.1rem;
  text-align: center;
  letter-spacing: 2px;
  margin: 20px 0;
}

.code-input {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 30px 0;
}

.code-input input {
  width: 50px;
  height: 60px;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

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

/* ============ EMPTY STATE ============ */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: 20px;
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--gray-700);
  margin-bottom: 10px;
}

/* ============ FOOTER ============ */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.7);
  padding: 20px;
  text-align: center;
  font-size: 0.85rem;
  margin-top: auto;
}

.footer a {
  color: var(--white);
  text-decoration: none;
}

/* ============ UTILITIES ============ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-10 { gap: 10px; }
.gap-20 { gap: 20px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    gap: 10px;
    text-align: center;
    padding: 12px 15px;
  }
  
  .header-user {
    flex-direction: column;
    gap: 8px;
  }
  
  .user-info {
    text-align: center;
  }
  
  .main-content {
    padding: 12px;
  }
  
  .payslip-grid,
  .dashboard-stats {
    grid-template-columns: 1fr !important;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
  }
  
  .nav-link {
    justify-content: center;
    padding: 8px 12px;
    font-size: 0.82rem;
  }
  
  .nav-link svg {
    width: 14px;
    height: 14px;
  }
  
  .card {
    margin-bottom: 12px;
  }
  
  .card-header {
    padding: 14px 16px;
    flex-direction: column;
    gap: 8px;
  }
  
  .card-title {
    font-size: 1rem;
  }
  
  .card-body {
    padding: 14px 16px;
  }
  
  .table th, .table td {
    padding: 10px 8px;
    font-size: 0.85rem;
  }
  
  .btn-sm {
    padding: 6px 10px;
    font-size: 0.78rem;
  }
  
  h2 {
    font-size: 1.1rem;
  }

  .login-body {
    padding: 30px 20px;
  }
  
  .pdf-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .pdf-actions {
    justify-content: center;
  }
}

/* ============ PAGINATION ============ */
.pagination {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.pagination a,
.pagination span {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  background: var(--white);
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
  transition: var(--transition);
}
.pagination a:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.pagination span.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* ============ BADGE ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger  { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-gray    { background: var(--gray-200); color: var(--gray-600); }

/* ============ TABLE CONTAINER ============ */
.table-container { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Print styles */
@media print {
  .header, .footer, .btn, .nav-menu {
    display: none !important;
  }
  
  .main-content {
    padding: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}