:root {
  --blue-header: #0d47a1;         
  --blue-medium: #1565c0;         
  --blue-accent: #1976d2;         
  --bg-app: #c8e6c9;              
  --card-bg: #ffffff;                 
  --card-border: #0d47a1;         
  --text-main: #000000;               
  --text-muted: #1b5e20;      
}

* { box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; margin: 0; padding: 0; }
body { background-color: var(--bg-app); display: flex; justify-content: center; min-height: 100vh; }

.mobile-container {
  width: 100%;
  max-width: 600px;
  background: var(--bg-app);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  border: 6px solid var(--blue-header);
  box-shadow: 0 4px 15px rgba(0,0,0,0.25);
}

.app-bar {
  background-color: var(--blue-header);
  color: white;
  padding: 15px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 18px;
}

.app-bar button { background: none; border: none; color: white; font-size: 22px; cursor: pointer; }

.view { display: none; padding: 15px; flex: 1; }
.view.active { display: block; }

.grid-menu {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.grid-item {
  background: var(--card-bg);
  padding: 20px 6px;
  border-radius: 6px;
  text-align: center;
  border: 1px solid var(--card-border);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.icon-box { font-size: 26px; margin-bottom: 6px; }
.grid-item span.label { font-size: 12px; font-weight: bold; color: var(--text-main); }

.form-container {
  background: var(--card-bg);
  border-radius: 8px;
  padding: 18px 15px;
  border: 1px solid var(--card-border);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: bold;
  color: var(--text-main);
  margin-bottom: 5px;
}
.form-group input, .form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  font-size: 14px;
  background: #ffffff;
  color: var(--text-main);
}

.excel-table-container {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 15px;
  max-height: 450px;
}
.excel-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
  text-align: left;
  table-layout: auto;
}
.excel-table th {
  background-color: var(--blue-header);
  color: white;
  padding: 8px 4px;
  font-weight: bold;
  border: 1px solid #0b3c8c;
  position: sticky;
  top: 0;
  white-space: nowrap;
}
.excel-table td {
  padding: 6px 4px;
  border: 1px solid #d0d7de;
  color: var(--text-main);
  word-break: break-word;
}
.excel-table tr:nth-child(even) { background-color: #f1f8e9; }

.calc-container {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 15px;
}
.calc-screen {
  width: 100%;
  height: 50px;
  background: #e8f5e9;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  font-size: 22px;
  text-align: right;
  padding: 10px;
  margin-bottom: 12px;
  font-weight: bold;
  color: var(--text-main);
}
.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.calc-btn {
  background: #f1f8e9;
  border: 1px solid var(--card-border);
  padding: 12px;
  font-size: 16px;
  font-weight: bold;
  border-radius: 6px;
  cursor: pointer;
  color: var(--blue-header);
}
.calc-btn.operator { background: var(--blue-header); color: white; }

.stats-box {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 12px;
}
.stats-title { font-weight: bold; font-size: 14px; color: var(--blue-header); margin-bottom: 6px; }
.stats-value { font-size: 20px; font-weight: 900; color: var(--text-main); }

.btn-action {
  width: 100%;
  background: var(--blue-header);
  color: white;
  border: none;
  padding: 12px;
  border-radius: 6px;
  font-weight: bold;
  margin-top: 10px;
  cursor: pointer;
}
.btn-secondary { background: #cfd8dc; color: #37474f; border: 1px solid var(--card-border); }
.btn-delete { background: #d32f2f; color: white; border: none; padding: 5px 8px; border-radius: 4px; font-weight: bold; cursor: pointer; font-size: 10px; }
.btn-edit { background: #0288d1; color: white; border: none; padding: 5px 8px; border-radius: 4px; font-weight: bold; cursor: pointer; font-size: 10px; margin-right: 2px; }
.btn-view { background: #00838f; color: white; border: none; padding: 5px 8px; border-radius: 4px; font-weight: bold; cursor: pointer; font-size: 10px; margin-left: 2px; }
.btn-pay { background: #2e7d32; color: white; border: none; padding: 5px 8px; border-radius: 4px; font-weight: bold; cursor: pointer; font-size: 10px; margin-right: 2px; }

.modal-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 15px;
}
.modal-content {
  background: #ffffff;
  width: 100%;
  max-width: 340px;
  border-radius: 8px;
  padding: 20px;
  border: 2px solid var(--blue-header);
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.receipt-preview-box {
  background: #fdfdfd;
  border: 1px dashed #999;
  padding: 15px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  line-height: 1.4;
  color: #111;
  text-align: left;
  white-space: pre-wrap;
  margin-bottom: 15px;
  border-radius: 4px;
  max-height: 300px;
  overflow-y: auto;
}

#debugLog {
  background: #ffebee;
  color: #c62828;
  border: 1px solid #ef9a9a;
  padding: 8px;
  font-size: 11px;
  margin-top: 10px;
  border-radius: 4px;
  display: none;
  word-break: break-all;
}