@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@100..900&display=swap");

/* ========== Base ========== */
:root {
  --text: #ffffff;
  --muted: #ffffff;
  --brand: #ff4fa3; /* お問い合わせボタン色 */
  --header-h: 121px;
  --hero-shift: -8vh;
  --sbw: 0px;
}

* { box-sizing: border-box; }
html, body {
  height: 100%;
  max-width: 100%;
  overflow-x: clip;
}

@supports not (overflow: clip) {
  html, body {
    overflow-x: hidden;
  }
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

button,
input,
select,
textarea {
  font-family: "Noto Sans JP", sans-serif;
}

a { color: inherit; text-decoration: none; }

.container {
  width: min(1180px, 92vw);
  margin-inline: auto;
}

/* ===== ローディング画面 ===== */
#video-loader {
  position: fixed;
  inset: 0;
  background: #fff;
  color: #2b4f78;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

#video-loader.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

html.top-loader-seen #video-loader {
  display: none;
}

#video-loader .loader-inner {
  position: relative;
  isolation: isolate;
  display: grid;
  justify-items: center;
  gap: 16px;
  text-align: center;
}

#video-loader .loader-pattern {
  position: absolute;
  left: 50%;
  top: 50%;
  width: clamp(420px, 68vw, 980px);
  height: clamp(420px, 68vw, 980px);
  transform: translate(-50%, -50%);
  background: url("../img/loading-grinder-design2.png?v=alpha10") no-repeat center center / contain;
  opacity: 1 !important;
  filter: none;
  pointer-events: none;
  z-index: 0;
  animation: loader-overview-pattern-spin 52s linear infinite;
}

#video-loader .loader-inner::before {
  content: none;
}

#video-loader .loader-inner::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: clamp(230px, 30vw, 420px);
  height: clamp(230px, 30vw, 420px);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #fff;
  pointer-events: none;
  z-index: 1;
}

#video-loader .loader-inner > :not(.loader-pattern) {
  position: relative;
  z-index: 2;
}

#video-loader .loader-logo {
  display: block;
  width: min(260px, 62vw);
  height: auto;
}

#video-loader .loader-text {
  margin: 0;
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  font-size: clamp(15px, 2.2vw, 20px);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #2b4f78;
}

#video-loader .loader-word {
  margin-right: 1px;
}

#video-loader .loader-dot {
  opacity: 0.2;
  animation: loader-dot 1.2s infinite ease-in-out;
}

#video-loader .loader-dot:nth-child(2) {
  animation-delay: 0s;
}

#video-loader .loader-dot:nth-child(3) {
  animation-delay: 0.2s;
}

#video-loader .loader-dot:nth-child(4) {
  animation-delay: 0.4s;
}

@keyframes loader-dot {
  0%, 80%, 100% {
    opacity: 0.2;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-2px);
  }
}

@keyframes loader-overview-pattern-spin {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(-360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  #video-loader .loader-pattern {
    animation: none;
  }
}

/* ===== ページを最初は非表示に ===== */
body.loading {
  overflow: hidden;
}

body.loading main {
  opacity: 0;
  transition: opacity 0.6s ease;
}

body.ready main {
  opacity: 1;
  background-color: #fff;
}