html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: #f9fafb;
  color: #111827;
  font-family: "Noto Sans JP", "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  overflow-x: clip;
}

#__next {
  min-height: 100%;
}

a {
  color: #10b981;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button, input, textarea, select {
  font: inherit;
}

button {
  cursor: pointer;
}

.accent-gradient {
  height: 4px;
  background: linear-gradient(90deg, #06b6d4 0%, #22c55e 35%, #f97316 70%, #ec4899 100%);
}

.app-topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid #e5e7eb;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

.app-topbar > div {
  max-width: 1220px;
  margin: 0 auto;
  min-height: 80px;
}

.app-shell {
  min-height: calc(100vh - 81px);
  background: #f9fafb;
  overflow-x: clip;
}

.app-shell__content {
  position: relative;
  z-index: 10;
}

.card, .soft-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  transition: 0.2s ease;
}

.btn-primary {
  background: #10b981;
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: #10b981;
  border: 1px solid #10b981;
}

.input {
  width: 100%;
  border: 1px solid #d1d5db;
  border-radius: 12px;
  padding: 10px 14px;
  background: #fff;
  box-sizing: border-box;
}

.label {
  font-size: 14px;
  font-weight: 600;
  color: #374151;
}