/* ============================================================
   common.css
   全ページ共通スタイル
   DUCK WORKS Uranai Tools
============================================================ */

/* ============================================================
   Variables
============================================================ */
:root {
  /* Colors */
  --c-main: #333333;
  --c-sub: #626e92;
  --c-bg: #efefed;
  --c-white: #ffffff;
  --c-border: #d0cfc9;
  --c-footer: #333333;
  --c-muted: #888880;

  /* Typography
     ベース: Noto Sans JP / 16px / regular / 行間160%
     見出し: Yu Mincho / Demibold
     英字:   Playfair Display / medium
  */
  --f-sans: "Noto Sans JP", sans-serif;
  --f-mincho: "Yu Mincho", "YuMincho", "游明朝", "ヒラギノ明朝 ProN", serif;
  --f-en: "Playfair Display", serif;

  /* Layout */
  --max-w: 1000px;
  --pad: 32px;

  /* Effects */
  --radius-card: 0px;
  --shadow: 0 1px 6px rgba(0, 0, 0, 0.07);
  --shadow-h: 0 6px 24px rgba(0, 0, 0, 0.13);
  --ease: 0.22s ease;
}

/* ============================================================
   Reset
============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-main);
  background-color: var(--c-bg);
  background-image: url("../images/common/bg_pattern.jpg");
  background-repeat: repeat;
  background-size: 100px 100px;
  min-height: 100vh;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
ul {
  list-style: none;
}

/* ============================================================
   Header
============================================================ */
.site-header {
  padding: 16px var(--pad);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  font-family: var(--f-en);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--c-main);
}

/* SP ハンバーガー */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--c-main);
  transition: var(--ease);
}
.hamburger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.sp-nav {
  display: none;
  flex-direction: column;
  background: var(--c-white);
  border-bottom: 1px solid var(--c-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.07);
}
.sp-nav.is-open {
  display: flex;
}
.sp-nav a {
  font-size: 16px;
  padding: 16px var(--pad);
  border-bottom: 1px solid var(--c-border);
}

/* ============================================================
   Footer
============================================================ */
.site-footer {
  background: var(--c-footer);
  color: rgba(255, 255, 255, 0.5);
  padding: 48px var(--pad) 40px;
  text-align: center;
}
.footer-logo {
  font-family: var(--f-en);
  font-size: 22px;
  font-weight: 500;
  color: var(--c-white);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--f-sans);
  font-size: 16px;
  color: #ffffff;
  letter-spacing: 0.03em;
  transition: color var(--ease);
  margin-bottom: 0;
}
.footer-link:hover {
  color: var(--c-sub);
}
.footer-link svg {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}

/* コピーライト：ページ背景と共通・14px・上下1em余白 */
.footer-copyright {
  background-color: var(--c-bg);
  background-image: url("../images/common/bg_pattern.jpg");
  background-repeat: repeat;
  background-size: 100px 100px;
  color: var(--c-main);
  font-family: var(--f-sans);
  font-size: 14px;
  text-align: center;
  padding: 1em var(--pad);
}

/* ============================================================
   Animations（共通）
============================================================ */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   Responsive（共通部分）
============================================================ */
@media (max-width: 800px) {
  :root {
    --pad: 20px;
  }
  .hamburger {
    display: flex;
  }
}