/* Modern Dynamic CSS Design System for Personal Receipt Archive */
:root {
  --bg-dark: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --bg-input: #020617;
  --border-color: #334155;
  --border-focus: #38bdf8;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-primary: #38bdf8;
  --accent-hover: #0284c7;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --accent-purple: #818cf8;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.5);
  --transition-fast: 0.15s ease;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-family);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

/* App Shell & Header */
.app-header {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-icon {
  font-size: 1.4rem;
}

.badge-tag {
  font-size: 0.7rem;
  background: var(--border-color);
  color: var(--accent-primary);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
  text-transform: uppercase;
}

.user-toolbar {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

.btn-primary {
  background: var(--accent-primary);
  color: var(--bg-dark);
  border: none;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-danger {
  background: var(--accent-danger);
  color: #fff;
  border: none;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
}

/* Authentication & 2FA Cards */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 70px);
  padding: 1.5rem;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}

.auth-card h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.auth-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.8rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.input-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.65rem 0.9rem;
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
}

.input-control:focus {
  outline: none;
  border-color: var(--border-focus);
}

.qr-wrapper {
  background: #fff;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin: 1rem 0;
}

.secret-key-box {
  background: var(--bg-input);
  border: 1px dashed var(--border-color);
  padding: 0.5rem 0.8rem;
  font-family: monospace;
  font-size: 0.9rem;
  color: var(--accent-primary);
  border-radius: var(--radius-sm);
  word-break: break-all;
  user-select: all;
  margin-bottom: 1.2rem;
}

/* Dashboard Layout */
.dashboard-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem;
}

.action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.dashboard-title-group h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.dashboard-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.stat-content label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  display: block;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
}

/* Filter Controls Toolbar */
.filter-toolbar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.search-input-group {
  flex: 2;
  min-width: 260px;
  position: relative;
}

.search-input-group input {
  padding-left: 2.4rem;
}

.search-icon {
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.filter-group {
  flex: 1;
  min-width: 150px;
}

/* Multiselect Toolbar */
.multiselect-bar {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.2rem;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.select-all-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
}

/* Receipt Grid & Cards */
.receipts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.2rem;
}

.receipt-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  gap: 1rem;
  position: relative;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.receipt-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.receipt-card.selected {
  border-color: var(--accent-primary);
  background: rgba(56, 189, 248, 0.05);
}

.card-select {
  display: flex;
  align-items: flex-start;
  padding-top: 0.2rem;
}

.card-thumb {
  width: 72px;
  height: 90px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-input);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.thumb-placeholder {
  font-size: 1.8rem;
}

.card-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.card-vendor {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.card-amount {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0.4rem 0;
}

.ocr-badge {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-success);
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.tag-pill {
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-size: 0.7rem;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  grid-column: 1 / -1;
  color: var(--text-secondary);
}

.empty-state h3 {
  color: var(--text-primary);
  margin: 1rem 0 0.4rem;
}

/* Modals & Drawers */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.3rem;
  font-weight: 700;
}

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

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
}

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

.preview-image-container {
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  max-height: 480px;
}

.preview-image-container img {
  max-width: 100%;
  max-height: 480px;
  object-fit: contain;
}

.preview-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.detail-row label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  display: block;
}

.detail-row p {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.ocr-box {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.8rem;
  font-family: monospace;
  font-size: 0.8rem;
  max-height: 150px;
  overflow-y: auto;
  white-space: pre-wrap;
  color: var(--text-secondary);
}

/* Camera Capture Viewfinder Modal */
.camera-box {
  width: 100%;
  aspect-ratio: 3/4;
  max-height: 380px;
  background: #000;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  margin-bottom: 1rem;
}

.camera-box video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.viewfinder-guide {
  position: absolute;
  top: 10%;
  left: 10%;
  right: 10%;
  bottom: 10%;
  border: 2px dashed rgba(56, 189, 248, 0.6);
  border-radius: var(--radius-sm);
  pointer-events: none;
}