/* ===== usecase page ===== */

/* ヒーロー：modaai-sectionと同じアニメーション背景 */
.usecase-hero {
  padding: 140px 40px 80px;
  text-align: center;
  background: rgb(20, 31, 47);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.usecase-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.4;
  animation: gridMove 20s linear infinite;
  pointer-events: none;
  z-index: 0;
}

.usecase-hero .digital-space,
.usecase-hero .node-container,
.usecase-hero .connection-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.usecase-hero-content {
  position: relative;
  z-index: 2;
}

.usecase-hero .section-label {
  margin-bottom: 16px;
}

.usecase-hero-title {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  margin: 0 0 20px;
}

.usecase-hero-sub {
  font-size: clamp(14px, 2vw, 17px);
  color: rgba(255,255,255,0.55);
  line-height: 1.8;
  margin: 0 auto;
  max-width: 600px;
}


/* ===== case nav ===== */
.usecase-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(20, 31, 47, 0.96);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.15);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  width: 100%;
}

.usecase-nav {
  display: flex;
  gap: 0;
  justify-content: center;
  margin: 0 auto;
  padding: 0;
}

.usecase-nav a {
  display: block;
  padding: 16px 24px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  letter-spacing: 0.05em;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.usecase-nav a:hover {
  color: #fff;
  border-bottom-color: #fff;
}

@media (max-width: 600px) {
  .usecase-nav {
    justify-content: center;
    overflow-x: auto;
  }
  .usecase-nav a {
    padding: 14px 16px;
  }
}


/* ===== case section：白背景 ===== */
.usecase-section {
  padding: 100px 40px;
  background: #fff;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.usecase-section:last-of-type {
  border-bottom: none;
}

.usecase-section-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.usecase-section-head {
  display: flex;
  align-items: flex-start;
  gap: 48px;
  margin-bottom: 64px;
}

.usecase-section-head-text {
  flex: 1;
}

@media (max-width: 768px) {
  .usecase-section {
    padding: 64px 20px;
  }
  .usecase-section-head {
    flex-direction: column;
    gap: 24px;
  }
}

.usecase-case-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.15em;
  color: rgba(20,31,47,0.5);
  border: 1px solid rgba(20,31,47,0.2);
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.usecase-case-title {
  font-size: clamp(22px, 3.5vw, 36px);
  font-weight: 700;
  color: #141f2f;
  line-height: 1.3;
  margin: 0 0 16px;
}

.usecase-case-desc {
  font-size: 15px;
  color: rgba(20,31,47,0.8);
  line-height: 1.9;
  margin: 0;
}


/* ===== before / after grid（2枚） ===== */
.usecase-ba {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

@media (max-width: 640px) {
  .usecase-ba {
    grid-template-columns: 1fr 1fr;
  }
  .usecase-ba-arrow {
    display: none;
  }
}


/* ===== before / after grid（3枚：food用） ===== */
.usecase-ba3 {
  display: grid;
  grid-template-columns: 1fr auto 1fr 1fr;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

@media (max-width: 640px) {
  .usecase-ba3 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }
  .usecase-ba3 .usecase-ba-arrow {
    display: none;
  }
  .usecase-ba3 .usecase-ba-col:nth-child(1) { grid-column: 1; grid-row: 1; }
  .usecase-ba3 .usecase-ba-col:nth-child(3) { grid-column: 2; grid-row: 1; }
  .usecase-ba3 .usecase-ba-col:nth-child(4) { grid-column: 1 / -1; grid-row: 2; }
}

.usecase-ba-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.usecase-ba-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(20,31,47,0.5);
  text-align: center;
  text-transform: uppercase;
}

.usecase-ba-img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,0.08);
  display: block;
}

@media (max-width: 640px) {
  .usecase-ba3 .usecase-ba-col:nth-child(4) .usecase-ba-img {
    aspect-ratio: 4/3;
  }
}

.usecase-ba-arrow {
  font-size: 28px;
  color: rgba(20,31,47,0.25);
  line-height: 1;
}


/* ===== prompt box：白背景用 ===== */
.usecase-prompt {
  background: #f5f6f8;
  border: 1px solid rgba(20,31,47,0.1);
  border-left: 3px solid rgb(20,31,47);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 56px;
}

.usecase-prompt-label {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: rgba(20,31,47,0.45);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.usecase-prompt-text {
  font-size: 13px;
  color: #141f2f;
  line-height: 1.8;
  margin: 0;
  font-family: 'Noto Sans JP', sans-serif;
}

.usecase-prompt-note {
  font-size: 12px;
  color: rgba(20,31,47,0.6);
  margin: 10px 0 0;
  line-height: 1.7;
}


/* ===== points：白背景用 ===== */
.usecase-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.usecase-point-card {
  background: #f5f6f8;
  border: 1px solid rgba(20,31,47,0.08);
  border-radius: 10px;
  padding: 20px;
}

.usecase-point-title {
  font-size: 16px;
  font-weight: 700;
  color: #141f2f;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.usecase-point-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgb(0, 28, 90);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.usecase-point-desc {
  font-size: 13px;
  color: rgba(20,31,47,0.75);
  line-height: 1.7;
  margin: 0;
}


/* ===== ヒーロー内アニメーション要素 ===== */
.usecase-hero .cube {
  position: absolute;
  width: 50px;
  height: 50px;
  border: 1px solid rgba(0, 180, 255, 0.4);
  background: rgba(0, 120, 255, 0.06);
  box-shadow: 0 0 15px rgba(0, 180, 255, 0.25);
  animation: cubeFloat 10s infinite ease-in-out;
}

.usecase-hero .node {
  position: absolute;
  width: 5px;
  height: 5px;
  background: rgba(0, 220, 255, 1);
  border-radius: 50%;
  box-shadow: 0 0 25px rgba(0, 220, 255, 0.7), 0 0 50px rgba(0, 180, 255, 0.3);
  animation: nodePulse 3s infinite ease-in-out;
}

.usecase-hero .connection-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 200, 255, 0.5), rgba(0, 240, 255, 0.7), transparent);
  transform-origin: left center;
  box-shadow: 0 0 8px rgba(0, 200, 255, 0.4);
  animation: lineGlow 4s infinite ease-in-out;
}


/* ===== usecase slider：画像サイズ統一 ===== */
.gslide2 {
  width: 100%;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  overflow: hidden;
  display: block;
}

.gslide2 img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  aspect-ratio: 3 / 4;
}

@media (hover: hover) {
  .gslide2 img {
    transition: transform .35s ease, filter .35s ease;
  }
  .gslide2:hover img {
    transform: scale(1.03);
    filter: brightness(1.05);
  }
}


/* ===== cases label ===== */
.usecase-cases-label {
  text-align: center;
  padding: 80px 40px 0;
  background: #fff;
}

.usecase-cases-label__sub {
  display: inline-block;
  background: rgb(145, 145, 145);
  color: #fff;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 30px;
}

.usecase-cases-label__title {
  font-size: 2rem;
  font-weight: 300;
  color: #0a0a0a;
  letter-spacing: -1px;
  margin: 0;
}