/**
 * KSeF Invoice Form Styles
 * Polish Invoice Theme - Professional & Clean
 */

:root {
  /* Colors */
  --color-primary: #1a1a2e;
  --color-primary-dark: #0f0f1a;
  --color-accent: #e94560;
  --color-accent-hover: #ff6b6b;
  --color-success: #00d26a;
  --color-warning: #ffc107;
  --color-error: #dc3545;
  
  /* Backgrounds */
  --bg-page: #f8f9fa;
  --bg-card: #ffffff;
  --bg-section: #fafbfc;
  --bg-input: #ffffff;
  
  /* Borders */
  --border-color: #e1e4e8;
  --border-color-focus: #e94560;
  
  /* Text */
  --text-primary: #1a1a2e;
  --text-secondary: #6c757d;
  --text-muted: #9ca3af;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 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);
  
  /* 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: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Typography */
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

/* Header */
.header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.logo-icon {
  font-size: 2rem;
}

.logo h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.logo .accent {
  color: var(--color-accent);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Form */
.invoice-form {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* Sections */
.form-section {
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-section);
}

.form-section:nth-child(odd) {
  background: var(--bg-card);
}

.form-section:last-of-type {
  border-bottom: none;
}

.section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.section-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-accent);
  color: white;
  border-radius: 50%;
  font-size: 0.875rem;
  font-weight: 700;
}

/* Form Grid */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

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

.form-group.full-width {
  grid-column: 1 / -1;
}

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

/* Form Inputs */
input, select, textarea {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-input);
  color: var(--text-primary);
  transition: all 0.2s ease;
  outline: none;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--border-color-focus);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
}

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

input:read-only {
  background: var(--bg-section);
  color: var(--text-secondary);
}

input[type="date"] {
  cursor: pointer;
}

input[type="number"] {
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236c757d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

textarea {
  resize: vertical;
  min-height: 80px;
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-sm) 0;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.checkbox-label span {
  font-size: 0.9375rem;
}

/* Invoice Lines */
.invoice-lines {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.invoice-line {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.line-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.line-number {
  font-weight: 600;
  color: var(--color-primary);
}

.btn-remove-line {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-remove-line:hover {
  background: var(--color-error);
  border-color: var(--color-error);
  color: white;
}

.line-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

.line-name {
  grid-column: 1 / 3;
}

.line-netto, .line-vat-value, .line-brutto {
  background: var(--bg-section);
}

.line-netto input, 
.line-vat-value input, 
.line-brutto input {
  font-family: var(--font-mono);
  font-weight: 500;
}

/* Totals Summary */
.totals-summary {
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-lg);
}

.totals-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  font-size: 0.9375rem;
}

.totals-row span:last-child {
  font-family: var(--font-mono);
  font-weight: 500;
}

.totals-final {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin-top: var(--spacing-sm);
  padding-top: var(--spacing-md);
  font-size: 1.125rem;
  font-weight: 600;
}

/* Buttons */
.form-actions {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  background: var(--bg-card);
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-icon {
  font-size: 1.125rem;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-accent);
  color: white;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-md);
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 800px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

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

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: var(--bg-section);
  color: var(--text-primary);
}

.xml-output {
  flex: 1;
  overflow: auto;
  padding: var(--spacing-lg);
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  background: var(--color-primary-dark);
  color: #e6e6e6;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--spacing-xl) 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .line-grid {
    grid-template-columns: 1fr;
  }
  
  .line-name {
    grid-column: 1;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .logo h1 {
    font-size: 1.75rem;
  }
}

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

.form-section {
  animation: fadeIn 0.3s ease forwards;
}

.form-section:nth-child(1) { animation-delay: 0s; }
.form-section:nth-child(2) { animation-delay: 0.05s; }
.form-section:nth-child(3) { animation-delay: 0.1s; }
.form-section:nth-child(4) { animation-delay: 0.15s; }
.form-section:nth-child(5) { animation-delay: 0.2s; }

/* Print styles */
@media print {
  body {
    background: white;
  }
  
  .header, .footer, .form-actions, .btn {
    display: none;
  }
  
  .invoice-form {
    box-shadow: none;
  }
  
  .form-section {
    background: white;
    page-break-inside: avoid;
  }
}