/* ==========================================================================
   Base Layout & Grid Styles - ScanMan
   ========================================================================== */

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

html, body {
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Background Ambient Gradient */
body::before {
  content: "";
  position: fixed;
  top: -15%;
  left: 20%;
  width: 60vw;
  height: 50vh;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08) 0%, rgba(99, 102, 241, 0.04) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  filter: blur(80px);
}

.app-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ==========================================================================
   Header Navigation Bar
   ========================================================================== */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.75rem;
  background: rgba(11, 16, 28, 0.82);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
}

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

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  box-shadow: var(--shadow-glow-cyan);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
}

.brand-title {
  font-size: var(--font-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 40%, var(--accent-cyan-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan-light);
  border: 1px solid rgba(56, 189, 248, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Header Statistics Pill Bar */
.header-stats-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.35rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: var(--font-xs);
  color: var(--text-secondary);
}

.stat-dot {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
}
.stat-dot.emerald { background-color: var(--accent-emerald); box-shadow: 0 0 8px var(--accent-emerald); }
.stat-dot.amber { background-color: var(--accent-amber); box-shadow: 0 0 8px var(--accent-amber); }
.stat-dot.cyan { background-color: var(--accent-cyan); box-shadow: 0 0 8px var(--accent-cyan); }

.stat-value {
  font-weight: 700;
  color: #fff;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ==========================================================================
   Subheader & Filter Controls
   ========================================================================== */
.controls-subheader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.85rem 1.75rem;
  background: rgba(14, 21, 38, 0.4);
  border-bottom: 1px solid var(--border-subtle);
}

.sample-selector-group {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.sample-label {
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.sample-pills {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-input);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.sample-pill-btn {
  padding: 0.35rem 0.85rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-xs);
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sample-pill-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.sample-pill-btn.active {
  background: var(--accent-cyan);
  color: var(--text-inverse);
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(6, 182, 212, 0.4);
}

/* Search and Quick Filters */
.search-filter-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search-input-wrapper {
  position: relative;
  width: 260px;
}

.search-input-wrapper svg {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 0.45rem 0.75rem 0.45rem 2.25rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: #fff;
  font-size: var(--font-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}

/* ==========================================================================
   Main Dual-Pane Split Cockpit
   ========================================================================== */
.cockpit-main {
  flex: 1;
  display: grid;
  grid-template-columns: 52% 48%;
  min-height: calc(100vh - 120px);
}

@media (max-width: 1180px) {
  .cockpit-main {
    grid-template-columns: 1fr;
  }
}

/* LEFT PANE: Document Viewer */
.viewer-pane {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #060910;
  border-right: 1px solid var(--border-subtle);
  overflow: hidden;
}

.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.25rem;
  background: rgba(14, 21, 38, 0.85);
  backdrop-filter: var(--glass-blur-sm);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 20;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.toolbar-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: var(--font-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toolbar-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  color: #fff;
  border-color: var(--border-medium);
}

.toolbar-btn.active {
  background: rgba(56, 189, 248, 0.18);
  border-color: var(--accent-cyan-light);
  color: var(--accent-cyan-light);
  box-shadow: 0 0 12px var(--accent-cyan-glow);
}

.toolbar-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.zoom-level-text {
  font-size: var(--font-xs);
  font-family: var(--font-mono);
  color: var(--text-muted);
  min-width: 45px;
  text-align: center;
}

/* Document Viewport & Scroll Area */
.doc-viewport {
  position: relative;
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem;
  user-select: none;
}

.doc-canvas-wrapper {
  position: relative;
  display: inline-block;
  width: fit-content;
  transform-origin: top center;
  transition: transform 0.15s ease-out;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.85);
  border-radius: var(--radius-sm);
  background: #ffffff;
}

/* RIGHT PANE: Verification Inspector Form */
.inspector-pane {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 120px);
  overflow-y: auto;
  padding: 1.5rem 2rem;
  gap: 1.25rem;
  background: var(--bg-app);
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: rgba(10, 15, 28, 0.5);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(56, 189, 248, 0.4);
}