:root {
  --gd-primary: #1b6b4a;
  --gd-primary-dark: #145238;
  --gd-accent: #2d9f6f;
  --gd-bg: #f4f7f5;
  --gd-card: #ffffff;
  --gd-text: #1a2e24;
  --gd-muted: #5c7268;
  --gd-danger: #c0392b;
  --gd-success: #27ae60;
}

body {
  background: var(--gd-bg);
  color: var(--gd-text);
  font-family: "Segoe UI", system-ui, sans-serif;
}

.navbar-gd {
  background: linear-gradient(135deg, var(--gd-primary-dark), var(--gd-primary)) !important;
}

.navbar-gd .navbar-brand,
.navbar-gd .nav-link {
  color: #fff !important;
}

.navbar-gd .nav-link:hover {
  opacity: 0.85;
}

.page-title {
  font-weight: 700;
  color: var(--gd-primary-dark);
}

.module-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--gd-card);
  border: none;
  border-radius: 1rem;
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: 0 4px 20px rgba(27, 107, 74, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
}

.module-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(27, 107, 74, 0.2);
  color: inherit;
}

.module-card .module-icon {
  font-size: 3rem;
  color: var(--gd-primary);
  margin-bottom: 1rem;
}

.module-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.module-card p {
  color: var(--gd-muted);
  margin: 0;
  font-size: 0.95rem;
}

.numpad-wrapper {
  max-width: 360px;
  margin: 0 auto;
}

.numpad-display {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: right;
  padding: 1rem 1.25rem;
  background: var(--gd-card);
  border: 2px solid #dde8e2;
  border-radius: 0.75rem;
  margin-bottom: 1rem;
  color: var(--gd-primary-dark);
}

.numpad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.numpad-btn {
  min-height: 56px;
  font-size: 1.35rem;
  font-weight: 600;
  border: none;
  border-radius: 0.65rem;
  background: var(--gd-card);
  color: var(--gd-text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: background 0.15s;
}

.numpad-btn:active {
  transform: scale(0.97);
}

.numpad-btn-clear {
  background: #fdecea;
  color: var(--gd-danger);
}

.numpad-btn-back {
  background: #eef2f0;
}

.numpad-btn-confirm {
  background: var(--gd-success);
  color: #fff;
  grid-column: span 1;
  font-size: 1.75rem;
}

.numpad-message {
  min-height: 1.5rem;
  text-align: center;
  margin-top: 1rem;
  font-weight: 500;
}

.numpad-message.success {
  color: var(--gd-success);
}

.numpad-message.error {
  color: var(--gd-danger);
}

.stat-card {
  background: var(--gd-card);
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: 0 4px 16px rgba(27, 107, 74, 0.1);
  text-align: center;
  height: 100%;
}

.stat-card .stat-label {
  font-size: 0.9rem;
  color: var(--gd-muted);
  margin-bottom: 0.35rem;
}

.stat-card .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gd-primary-dark);
}

.stat-card.stat-fark .stat-value {
  color: var(--gd-accent);
}

.chart-container {
  background: var(--gd-card);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 4px 16px rgba(27, 107, 74, 0.1);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--gd-primary);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 1rem;
}

.back-link:hover {
  color: var(--gd-primary-dark);
}

.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--gd-muted);
}

footer.footer {
  background: transparent;
  border-top: 1px solid #dde8e2;
}