/* ==============================================================================
   RRPL Booking Agreement OCR Validator - Design System & Modern CSS
   ============================================================================== */

:root {
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;

  /* HSL Color Palette */
  --bg-primary: #070b14;
  --bg-secondary: #0d1527;
  --bg-surface: rgba(17, 26, 46, 0.75);
  --bg-surface-hover: rgba(26, 39, 68, 0.85);
  --bg-card: rgba(21, 32, 57, 0.6);
  --bg-input: rgba(11, 18, 33, 0.9);

  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-focus: #6366f1;
  --border-glow: rgba(99, 102, 241, 0.35);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* Status Colors */
  --color-match: #10b981;
  --color-match-bg: rgba(16, 185, 129, 0.12);
  --color-match-border: rgba(16, 185, 129, 0.35);

  --color-mismatch: #f43f5e;
  --color-mismatch-bg: rgba(244, 63, 94, 0.12);
  --color-mismatch-border: rgba(244, 63, 94, 0.35);

  --color-review: #f59e0b;
  --color-review-bg: rgba(245, 158, 11, 0.12);
  --color-review-border: rgba(245, 158, 11, 0.35);

  --color-error: #ef4444;
  --color-error-bg: rgba(239, 68, 68, 0.12);
  --color-error-border: rgba(239, 68, 68, 0.35);

  --accent-primary: #6366f1;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --accent-glow: 0 0 24px rgba(99, 102, 241, 0.45);

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 10% 20%, rgba(99, 102, 241, 0.12) 0px, transparent 40%),
    radial-gradient(at 90% 10%, rgba(6, 182, 212, 0.1) 0px, transparent 40%),
    radial-gradient(at 50% 90%, rgba(139, 92, 246, 0.08) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
}

/* App Container */
.app-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.5rem 2rem 4rem;
}

/* Header & Top Bar */
.top-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.75rem;
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-logo-badge {
  width: 48px;
  height: 48px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: #fff;
  box-shadow: var(--accent-glow);
}

.brand-title-group h1 {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 30%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-title-group p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.header-status-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.health-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
}

.health-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-match);
  box-shadow: 0 0 10px var(--color-match);
  animation: pulse-ring 1.8s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.05); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Metric KPI Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.kpi-card {
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.kpi-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 28px -8px rgba(0, 0, 0, 0.6);
}

.kpi-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
}

.kpi-card.total::after { background: var(--accent-gradient); }
.kpi-card.match::after { background: var(--color-match); }
.kpi-card.mismatch::after { background: var(--color-mismatch); }
.kpi-card.review::after { background: var(--color-review); }
.kpi-card.error::after { background: var(--color-error); }

.kpi-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.kpi-value {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.1;
}

.kpi-card.match .kpi-value { color: var(--color-match); }
.kpi-card.mismatch .kpi-value { color: var(--color-mismatch); }
.kpi-card.review .kpi-value { color: var(--color-review); }
.kpi-card.error .kpi-value { color: var(--color-error); }

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.75rem;
  padding-bottom: 0.25rem;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
  color: #fff;
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  box-shadow: 0 0 12px var(--accent-primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.25s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards & Layouts */
.glass-panel {
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 2rem;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.panel-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
}

.panel-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* Forms & Inputs */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

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

label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

input, select {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: var(--transition);
  outline: none;
}

input:focus, select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--border-glow);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.6);
}

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

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.82rem;
}

/* Result Card */
.result-display-card {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.5rem;
  position: relative;
  overflow: hidden;
}

.result-display-card.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.result-hero-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-badge.MATCH {
  background: var(--color-match-bg);
  border: 1px solid var(--color-match-border);
  color: var(--color-match);
}

.status-badge.MISMATCH {
  background: var(--color-mismatch-bg);
  border: 1px solid var(--color-mismatch-border);
  color: var(--color-mismatch);
}

.status-badge.REVIEW_REQUIRED {
  background: var(--color-review-bg);
  border: 1px solid var(--color-review-border);
  color: var(--color-review);
}

.status-badge.ERROR {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error);
}

.comparison-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.comp-box {
  background: var(--bg-input);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.comp-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.comp-val {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
}

/* Confidence meter */
.confidence-container {
  margin-top: 1rem;
}

.conf-bar-bg {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: 0.35rem;
}

.conf-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  transition: width 0.6s ease;
}

/* Data Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th {
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  white-space: nowrap;
}

tr:hover td {
  background: var(--bg-surface-hover);
}

.currency-cell {
  font-family: var(--font-mono);
  font-weight: 600;
}

/* Filter controls bar */
.table-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.search-input-wrap {
  position: relative;
  min-width: 280px;
}

.filter-btn-group {
  display: flex;
  gap: 0.5rem;
}

.filter-pill-btn {
  padding: 0.4rem 0.9rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-pill-btn.active, .filter-pill-btn:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-primary);
  color: #fff;
}

/* Modal for PDF Viewer & Details */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 999;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-overlay.open {
  display: flex;
}

.modal-dialog {
  width: 100%;
  max-width: 900px;
  height: 85vh;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  flex: 1;
  padding: 0;
  overflow: hidden;
}

.modal-iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.close-btn:hover {
  color: #fff;
}

/* Spinner */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

/* Responsive */
@media (max-width: 768px) {
  .app-container {
    padding: 1rem;
  }
  .top-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
}