/* ===================================================
   ZATCA E-Invoice Validator - Design System & Styles
   =================================================== */

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-glass: rgba(17, 24, 39, 0.6);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-crimson: #ef4444;
  --accent-crimson-glow: rgba(239, 68, 68, 0.25);
  --accent-amber: #f59e0b;
  --accent-amber-glow: rgba(245, 158, 11, 0.2);
  --accent-indigo: #6366f1;
  --accent-indigo-glow: rgba(99, 102, 241, 0.25);
  --accent-cyan: #06b6d4;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-arabic: 'Cairo', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px var(--accent-indigo-glow);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f3f4f6;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: rgba(249, 250, 251, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.7);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.16);

  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;

  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

/* Base & Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
}

.ar-text {
  font-family: var(--font-arabic);
  direction: rtl;
}

/* Header */
.app-header {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 1rem 2rem;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.4rem;
  box-shadow: 0 0 15px var(--accent-emerald-glow);
}

.brand-titles h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.phase-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  background: rgba(99, 102, 241, 0.2);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-radius: 9999px;
  font-weight: 600;
  text-transform: uppercase;
}

.brand-subtitle {
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-secondary {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

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

/* Main Container */
.main-content {
  max-width: 1400px;
  margin: 1.5rem auto;
  padding: 0 1.5rem 3rem;
}

/* Two-column layout */
.layout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
  margin-top: 1.5rem;
}

@media (max-width: 1024px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }
}

/* Card */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s ease;
}

.glass-card:hover {
  border-color: var(--border-strong);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Preset selector bar */
.sample-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.6rem 0.875rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.sample-label {
  font-size: 0.825rem;
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.sample-select {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  flex: 1;
  cursor: pointer;
  outline: none;
}

.sample-select:focus {
  border-color: var(--accent-indigo);
}

/* Drop Zone */
.drop-zone {
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: rgba(0, 0, 0, 0.1);
  margin-bottom: 1rem;
}

.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent-indigo);
  background: rgba(99, 102, 241, 0.05);
}

.drop-zone-icon {
  font-size: 2rem;
  color: var(--accent-indigo);
  margin-bottom: 0.5rem;
}

.drop-zone-text {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.drop-zone-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* XML Editor */
.editor-container {
  position: relative;
  margin-bottom: 1rem;
}

.xml-textarea {
  width: 100%;
  height: 420px;
  background: #090d16;
  color: #e2e8f0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  line-height: 1.5;
  resize: vertical;
  outline: none;
  tab-size: 2;
  white-space: pre;
}

.xml-textarea:focus {
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 2px var(--accent-indigo-glow);
}

.editor-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 15px var(--accent-emerald-glow);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

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

/* Results Status Banner */
.status-banner {
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  border: 1px solid transparent;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.status-banner.passed {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.status-banner.failed {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.status-banner.warnings {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.status-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.status-icon {
  font-size: 1.75rem;
}

.status-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.status-desc {
  font-size: 0.825rem;
  color: var(--text-secondary);
}

/* Metrics Grid */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.metric-card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  text-align: center;
}

.metric-num {
  font-size: 1.4rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.metric-num.errors { color: var(--accent-crimson); }
.metric-num.warnings { color: var(--accent-amber); }
.metric-num.passed { color: var(--accent-emerald); }
.metric-num.total { color: var(--accent-indigo); }

.metric-label {
  font-size: 0.725rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

/* Invoice Summary Card */
.invoice-summary-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.25rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  font-size: 0.85rem;
}

.summary-item {
  display: flex;
  flex-direction: column;
}

.summary-label {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.summary-val {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: #ffffff;
  background: var(--accent-indigo);
}

.tab-count {
  font-size: 0.75rem;
  padding: 0.1rem 0.4rem;
  border-radius: 9999px;
  background: rgba(0, 0, 0, 0.3);
}

/* Search Bar */
.search-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.875rem;
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  margin-bottom: 1rem;
}

.search-input:focus {
  border-color: var(--accent-indigo);
}

/* Issue Diagnostics Cards */
.issues-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 580px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.issue-card {
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--accent-crimson);
  padding: 1rem;
  transition: all 0.2s ease;
}

.issue-card.warning {
  border-left-color: var(--accent-amber);
}

.issue-card.passed {
  border-left-color: var(--accent-emerald);
}

.issue-card:hover {
  background: rgba(0, 0, 0, 0.45);
}

.issue-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
  gap: 0.5rem;
}

.rule-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.issue-card.warning .rule-badge {
  background: rgba(245, 158, 11, 0.15);
  color: #fde68a;
  border-color: rgba(245, 158, 11, 0.3);
}

.issue-card.passed .rule-badge {
  background: rgba(16, 185, 129, 0.15);
  color: #a7f3d0;
  border-color: rgba(16, 185, 129, 0.3);
}

.category-tag {
  font-size: 0.725rem;
  color: var(--text-muted);
}

.issue-titles {
  margin-bottom: 0.75rem;
}

.title-en {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.title-ar {
  font-family: var(--font-arabic);
  font-size: 0.95rem;
  color: #93c5fd;
  direction: rtl;
  text-align: right;
  margin-bottom: 0.4rem;
}

.message-box {
  background: rgba(0, 0, 0, 0.3);
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  color: #fca5a5;
  margin-bottom: 0.75rem;
  border: 1px dashed rgba(239, 68, 68, 0.3);
}

.issue-card.warning .message-box {
  color: #fde68a;
  border-color: rgba(245, 158, 11, 0.3);
}

.message-box-ar {
  font-family: var(--font-arabic);
  direction: rtl;
  text-align: right;
  margin-top: 0.3rem;
  font-size: 0.825rem;
}

/* Detailed Diagnostic Accordion / Blocks */
.explanation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0.5rem;
  background: rgba(255, 255, 255, 0.02);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

@media (max-width: 768px) {
  .explanation-grid {
    grid-template-columns: 1fr;
  }
}

.exp-block {
  display: flex;
  flex-direction: column;
}

.exp-label {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.725rem;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.exp-desc {
  color: var(--text-primary);
  line-height: 1.4;
}

.exp-desc.arabic {
  font-family: var(--font-arabic);
  direction: rtl;
  text-align: right;
  color: #e0e7ff;
}

.fix-box {
  grid-column: 1 / -1;
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.2);
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
}

.fix-title {
  color: #34d399;
  font-weight: 600;
  font-size: 0.75rem;
  margin-bottom: 0.25rem;
}

.xpath-tag {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  word-break: break-all;
}

/* QR Code TLV Section */
.qr-table-container {
  margin-top: 1.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.qr-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  text-align: left;
}

.qr-table th {
  background: rgba(0, 0, 0, 0.4);
  color: var(--text-secondary);
  padding: 0.6rem 0.875rem;
  font-weight: 600;
}

.qr-table td {
  padding: 0.6rem 0.875rem;
  border-top: 1px solid var(--border-subtle);
}

.qr-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.tag-badge {
  background: rgba(99, 102, 241, 0.2);
  color: #818cf8;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 0.75rem;
  opacity: 0.5;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  box-shadow: var(--shadow-card);
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from { transform: translateX(50px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Print Styles */
@media print {
  body {
    background: #ffffff;
    color: #000000;
  }
  .app-header, .sample-bar, .drop-zone, .editor-actions, .filter-tabs, .search-input, .btn-secondary, #inputPanel {
    display: none !important;
  }
  .layout-grid {
    grid-template-columns: 1fr;
  }
  .glass-card {
    border: 1px solid #ddd;
    box-shadow: none;
  }
}