/* =========================
   Reset / Base
========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
img{
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}
html {
  font-size: 16px; 
  scroll-behavior: smooth;
}

@media (max-width: 768px) {
  body {
    padding-bottom: 84px;
  }
}

:root {
  /* Color */
  --color-primary: #3b82f6;
  --color-secondary: #10b981;

  --color-text: #111111;
  --color-text-muted: #666666;
  --color-bg: #ffffff;
  --color-surface: #f7f7f7;
  --color-border: #dddddd;

  /* State */
  --color-success: #22c55e;
  --color-error: #ef4444;

  /* Font */
  
  --font-base:
    "Yu Gothic",
    "Yu Gothic Medium",
    "Yu Gothic UI",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    "Noto Sans JP",
    "Meiryo",
    sans-serif;
  --font-size-xs:13px;
  --font-serif:serif;

  --font-size-l:clamp(1.4rem, 1.2rem + 0.8vw, 1.7rem);
  /* Spacing */
  --space-xs: 4px;
  --space-s: 8px;
  --space-m: 16px;
  --space-l: 24px;
  --space-xl: 40px;
}
.ib{
  display: inline-block;
}
.button-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse, #fff); /* fallback可 */
  padding: var(--space-m) var(--space-l);
}

body {
  min-height: 100%;
  font-size: 1rem;
  line-height: 1.8;
  overflow-x: hidden;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-base);
  font-weight: 400;
  scroll-behavior: smooth;
}
ul, li{
    list-style: none;
}
a{
  text-decoration: none;
}
/* =========================
   Typography scale
========================= */
p {
  font-size: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
}
/*
h1 {
  font-size: clamp(1.8rem, 1.5rem + 1.2vw, 2.6rem);
}
*/
/*
h2 {
  font-size: clamp(1.4rem, 1.2rem + 0.8vw, 2rem);
}
*/
h3 {
  font-size: clamp(1.2rem, 1.1rem + 0.4vw, 1.5rem);
}
h1,h2,h3,h4{
  font-weight: normal;
}