:root {
  /* Açık Tema Renkleri */
  --bg-color: #f1f5f9;
  --text-color: #334155;
  --heading-color: #0f172a;

  --primary-color: #4f46e5;
  --primary-hover: #4338ca;

  --secondary-bg: #ffffff;
  --secondary-text: #64748b;

  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(226, 232, 240, 0.8);

  --success-color: #10b981;
  --success-bg: #d1fae5;
  --warning-color: #f59e0b;
  --warning-bg: #fef3c7;

  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --input-bg: #f8fafc;
  --radius: 12px;
}

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

body {
  font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  background-image:
    radial-gradient(at 0% 0%, rgba(79, 70, 229, 0.05) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.05) 0px, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Layout */
.app-container {
  display: flex;
  height: 100vh;
  padding: 20px;
  gap: 20px;
  max-width: 1600px;
  margin: 0 auto;
}

/* Sidebar / Müşteri Listesi */
.sidebar {
  width: 350px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--glass-border);
}

.sidebar-header h2 {
  color: var(--heading-color);
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--secondary-text);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--input-bg);
  color: var(--heading-color);
  outline: none;
  font-family: inherit;
  transition: all 0.3s ease;
}

.search-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);
  background: white;
}

.customer-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
}

.customer-item {
  padding: 15px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: 5px;
  border: 1px solid transparent;
  color: var(--text-color);
}

.customer-item:hover {
  background: rgba(0, 0, 0, 0.03);
}

.customer-item.active {
  background: rgba(79, 70, 229, 0.08);
  border-color: rgba(79, 70, 229, 0.3);
  color: var(--primary-color);
}

.customer-name {
  font-weight: 600;
  font-size: 1.05rem;
}

.customer-code {
  font-size: 0.85rem;
  color: var(--secondary-text);
  margin-top: 4px;
}

/* Main Content */
.main-content {
  flex: 1;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--secondary-text);
  font-size: 1.2rem;
}

.content-header {
  padding: 25px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.4);
}

.content-header h1 {
  color: var(--heading-color);
}

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

.btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: white;
  box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 8px -1px rgba(79, 70, 229, 0.35);
}

.btn-secondary {
  background: white;
  color: var(--heading-color);
  border: 1px solid var(--glass-border);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.logs-container {
  padding: 25px;
  overflow-y: auto;
  flex: 1;
}

.log-card {
  background: white;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 15px;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

.log-card:hover {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
  border-color: rgba(79, 70, 229, 0.2);
}

.log-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
}

.log-type {
  font-size: 0.75rem;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.type-copy {
  background: var(--success-bg);
  color: #059669;
}

.type-transfer {
  background: var(--warning-bg);
  color: #d97706;
}

.log-date {
  color: var(--secondary-text);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 5px;
}

.log-desc {
  margin-bottom: 12px;
  line-height: 1.6;
  color: var(--heading-color);
}

.log-details {
  background: var(--input-bg);
  padding: 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-color);
  border: 1px solid var(--glass-border);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: white;
  width: 550px;
  border-radius: var(--radius);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  animation: slideIn 0.3s ease;
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

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

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
}

.modal-header h3 {
  color: var(--heading-color);
  font-weight: 600;
}

.modal-header button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-color);
  padding: 5px;
  display: flex;
  align-items: center;
}

.modal-header button:hover {
  color: var(--heading-color);
}

.modal-body {
  padding: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--heading-color);
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  background: white;
  border: 1px solid #cbd5e1;
  color: var(--heading-color);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
  outline: none;
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox-label {
  background: #f1f5f9;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
  user-select: none;
  font-size: 0.9rem;
  color: var(--text-color);
  border: 1px solid transparent;
}

.checkbox-label:hover {
  background: #e2e8f0;
}

.checkbox-label input:checked + span {
  color: var(--primary-color);
  font-weight: 600;
}

.modal-footer {
  padding: 20px 24px;
  background: #f8fafc;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  border-top: 1px solid var(--glass-border);
}

.btn-icon-danger {
  background: none;
  border: none;
  cursor: pointer;
  color: #ef4444;
  padding: 5px;
  display: flex;
  align-items: center;
}

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Print Styles */
@media print {
  @page {
    margin: 2cm;
    size: A4;
  }

  * {
    background: transparent !important;
    color: black !important;
    text-shadow: none !important;
    filter: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
  }

  body, html {
    background: white !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: visible !important;
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif !important;
    font-size: 10pt !important;
  }

  .sidebar, .header-actions, .btn, .btn-icon-danger, .modal-overlay, .sidebar-header, .customer-list, .search-input {
    display: none !important;
  }
  
  .app-container > div:first-child {
     display: none !important;
  }

  .app-container {
    display: block !important;
    padding: 0 !important;
    margin: 0 !important;
    width: 100% !important;
    height: auto !important;
  }

  .main-content {
    display: block !important;
    border: none !important;
    box-shadow: none !important;
    background: white !important;
    padding: 0 !important;
  }

  .content-header {
    border-bottom: 3px double #333 !important;
    margin-bottom: 25px !important;
    padding-bottom: 10px !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: flex-end !important;
  }

  .content-header h1 {
    font-size: 24pt !important;
    color: #000 !important;
    margin: 0 !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
  }
  
  .content-header span {
    font-size: 12pt !important;
    color: #444 !important;
    font-weight: 600 !important;
    border: 1px solid #ccc !important;
    padding: 4px 8px !important;
  }

  .logs-container {
    padding: 0 !important;
  }

  .log-card {
    border: none !important;
    border-bottom: 1px solid #ddd !important;
    padding: 15px 0 !important;
    margin: 0 !important;
    page-break-inside: avoid !important;
    display: block !important;
  }
  
  .log-card:last-child {
    border-bottom: none !important;
  }

  .log-header {
     display: flex !important;
     justify-content: space-between !important;
     align-items: center !important;
     margin-bottom: 8px !important;
     background: #f9f9f9 !important;
     padding: 5px 10px !important;
     border-left: 4px solid #333 !important;
  }

  .log-type {
     font-size: 10pt !important;
     font-weight: 800 !important;
     color: #000 !important;
     border: none !important;
     background: transparent !important;
     padding: 0 !important;
     text-transform: uppercase !important;
     letter-spacing: 0.5px !important;
  }

  .log-date {
      font-size: 10pt !important;
      color: #555 !important;
      font-weight: normal !important;
  }
  
  .log-date svg {
      display: none !important;
  }

  .log-desc {
    font-size: 11pt !important;
    margin: 8px 10px !important;
    line-height: 1.5 !important;
    color: #222 !important;
    text-align: justify !important;
  }

  .log-details {
    border: none !important;
    background: transparent !important;
    padding: 0 10px !important;
    margin-top: 5px !important;
  }

  .log-details div:first-child {
      font-size: 9pt !important;
      font-weight: 700 !important;
      color: #666 !important;
      text-transform: uppercase !important;
      letter-spacing: 0.5px !important;
      margin-bottom: 2px !important;
  }

  .log-details span {
     border: 1px solid #888 !important;
     color: #000 !important;
     background: white !important;
     padding: 2px 6px !important;
     font-size: 9pt !important;
     font-weight: 500 !important;
     margin-right: 4px !important;
     display: inline-block !important;
  }
}