:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-green: #10b981;
  --accent-green-dark: #059669;
  --accent-blue: #38bdf8;
  --accent-purple: #a855f7;
  --border-color: #334155;
  --danger: #ef4444;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header.app-header {
  height: 52px;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
  flex-shrink: 0;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-title {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-title span {
  color: var(--accent-green);
}

.security-badge {
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 3px 8px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.actions-section {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn:hover {
  background-color: var(--bg-tertiary);
  border-color: #475569;
}

.btn-primary {
  background-color: var(--accent-green);
  border-color: var(--accent-green-dark);
  color: #ffffff;
  font-weight: 600;
}

.btn-primary:hover {
  background-color: var(--accent-green-dark);
}

.status-pill {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.6);
}

/* Spreadsheet Container */
#sheet-wrapper {
  flex: 1;
  width: 100%;
  position: relative;
  background-color: #fff;
}

#luckysheet {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 1;
  transition: opacity 0.2s ease;
}

.modal-overlay.hidden {
  display: none;
  opacity: 0;
}

.modal-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 28px;
  width: 90%;
  max-width: 520px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
}

.modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s ease;
}

.form-input:focus {
  border-color: var(--accent-green);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.recovery-box {
  background: var(--bg-primary);
  border: 1px dashed var(--border-color);
  border-radius: 6px;
  padding: 12px;
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--accent-blue);
  word-break: break-all;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 24px;
}

/* Inspector Code Box */
.inspector-box {
  background: #000;
  color: #38bdf8;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  padding: 14px;
  border-radius: 8px;
  max-height: 240px;
  overflow-y: auto;
  line-height: 1.4;
  border: 1px solid #1e293b;
  margin-top: 12px;
  word-break: break-all;
}

.alert-danger {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 8px;
}