/* 基本設定 */
:root {
  --black: #000;
  --gray: #999;
  --light-gray: #f0f0f0;
  --accent: #ff3b00;
  --bg: #fff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--black);
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* スクロールスナップ */
main {
  height: 100vh;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
}

.snap-section {
  height: 100vh;
  scroll-snap-align: start;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 10%;
}

/* ============================================
   HERO セクション
   ============================================ */
.mega-logo {
  width: 680px;
  height: auto;
  margin-bottom: 2rem;
}

.mega-text {
  font-size: 130px;
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.04em;
  white-space: nowrap;
}

.mega-text .small-ruby {
  display: block;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.1em;
  margin-bottom: -3.2em;
  transform: none;
}

/* ============================================
   共通要素
   ============================================ */
.corner-logo {
  position: absolute;
  top: 40px;
  right: 40px;
  width: 75px;
  opacity: 0.7;
}

.container-narrow { max-width: 800px; }
.container-wide { max-width: 1200px; }

.section-label {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.6em;
  color: var(--gray);
  margin-bottom: 1.5rem;
}

.bold-title {
  font-size: clamp(2.5rem, 5vw, 4.0rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

/* ============================================
   ABOUT セクション ★改善ポイント
   ============================================ */
.container-about {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.about-header {
  margin-bottom: 2rem;
}

.about-lead {
  font-size: 1.05rem;
  line-height: 1.9;
  color: #333;
  margin-top: 1.5rem;
  max-width: 680px;
}

/* 2×2グリッド */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem 3rem;
  border-top: 1px solid #e5e5e5;
  padding-top: 3rem;
}

.about-item {
  position: relative;
  padding-left: 3.0rem;
}

.item-number {
  position: absolute;
  left: 0;
  top: 0.2rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.item-tag {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  margin-bottom: 0.8rem;
  color: var(--black);
  display: inline-block;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--black);
}

.item-desc {
  font-size: 0.95rem;
  line-height: 1.8;
  color: #444;
  letter-spacing: 0.01em;
}

/* ============================================
   WORKS セクション
   ============================================ */
.works-minimal-list { list-style: none; margin-top: 1rem; }
.works-item { margin-bottom: 1.2rem; }
.works-item a { text-decoration: none; color: var(--black); display: flex; flex-direction: column; }
.work-name {
  font-size: 3.5rem;
  font-weight: 200;
  letter-spacing: -0.02em;
  opacity: 0.6;
  transition: opacity 0.4s ease;
}
.work-url {
  font-size: 0.75rem;
  color: var(--gray);
  opacity: 1;
  transition: opacity 0.4s ease;
}
.works-item a:hover .work-name { opacity: 1; font-weight: 400; }
.works-item a:hover .work-url { opacity: 1; }

/* ============================================
   CONTACT セクション
   ============================================ */
.huge-mail-link {
  font-size: clamp(1.2rem, 4vw, 3.5rem);
  font-weight: 900;
  text-decoration: underline;
  margin-bottom: 4rem;
  display: inline-block;
  color: var(--black);
}
.footer-meta { font-size: 0.9rem; color: var(--black); line-height: 2; }

/* ============================================
   レスポンシブ
   ============================================ */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .snap-section { padding: 0 30px; }
  .mega-text { font-size: 14vw; }
  .work-name { font-size: 1.8rem; opacity: 1; }
  .work-url { opacity: 0.6; }
  .corner-logo { top: 20px; right: 20px; width: 45px; }
  .about-header { margin-bottom: 2.5rem; }
  .about-item { padding-left: 2.8rem; }
}