/* ===== UTILITY CLASSES ===== */
.section-title{
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  flex-direction:column;
  margin-bottom: 40px;
}

.section-icon{
  display:block;
  font-size:28px;
  color:#6B82A3;
  margin-bottom:30px;
  text-align:center;
  width:40px;
  opacity:0.7;
  height:auto;
  object-fit:contain;
  margin:0 auto;
}

.section-title span{
  font-size:clamp(2.2rem, 3vw, 2.4rem);
  font-weight:bold;
  margin-top: 10px;
}

.section__description{
  font-size:clamp(1rem, 1.2vw, 1.2rem);
  margin-bottom:20px;
  color:#666;
  line-height:1.7;
}

/* ===== HOME SECTION ===== */
.home-section {
  position: relative;
  min-height: 100svh;
  padding-top: var(--header-height);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--light-text);
  z-index: 0;
  background: #6B82A3;
}

/* 背景グラデーション */
.home-section::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
  linear-gradient(160deg, #5E7595 0%, #8FA6C6 100%),
  radial-gradient(circle at 70% 40%, rgba(255,255,255,0.15),transparent 60%);
}

/* 左側：テキスト　＋　右側：画像 */
.home-section__content {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
  padding: 0 clamp(16px, 4vw, 24px);
  gap: clamp(24px, 4vw, 80px);
}

.home-section__text {
  position: relative;
  max-width: 800px;
  width: 100%;
}

/* ロゴ画像 */
.home-section__title {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align:center;
  margin-bottom: clamp(16px, 2vw, 24px);
}

.home-section__title-image {
  width: clamp(180px, 35vw, 320px);
  height: auto;
}

/* タイトルテキスト（非表示） */
.home-section__title-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.home-section__sub-title {
  text-align: center;
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  line-height:1.6;
  margin-top:clamp(20px, 4vw, 30px);
  line-height: 1.6;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  margin-top:clamp(10px, 2vw, 20px);
}

.home-section__sub-title-br{
  display: inline;
}

.home-section__description {
  margin-top: clamp(10px, 2vw, 16px);
  font-size: clamp(0.75rem, 0.9vw, 1rem);
  color: rgba(255,255,255,0.85);
}

/* ストアボタン */
.download-lead {
  margin-top: clamp(16px, 3vw, 20px);
  margin-bottom: clamp(10px, 2vw, 20px);
  font-size: clamp(0.8rem, 1vw, 1rem);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: rgba(255,255,255,0.9);
}

.store-buttons{
  display:flex;
  gap: clamp(8px, 1.5vw, 16px);
  justify-content:center;
  flex-wrap: wrap;
}

.store-buttons__item{
  display:flex;
  align-items:center;
  justify-content:center;
  height:clamp(60px, 10vw, 68px)
}

.store-buttons__image{
  height: clamp(48px, 7vw, 60px);
  width:100%;
  object-fit:contain;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.store-buttons__item:hover{
  transform: translateY(-2px) scale(1.03);
}

.store-buttons__item-wrapper{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
}

/* スマホモック画像 */
.home-section__image {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.home-section__image-img {
  width: 300px;
  height: auto;
  filter:
    drop-shadow(0 10px 15px rgba(0,0,0,0.20))
    drop-shadow(0 30px 40px rgba(0,0,0,0.25));
  transform: translateX(clamp(0px, 2vw, 20px));
}

/* ===== ABOUT SECTION ===== */
.about-section{
  text-align:center;
  padding: 0;
}

.about-section__content{
  text-align:center;
  align-items:center;
  width: 100%;
  margin: 0 auto;
}

#about {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
}

.about-section__description{
  line-height: 1.9;
}

/* ===== FEATURES SECTION ===== */
.features-section{
  text-align:center;
}

.features-section__sub-title-br{
  display: none;
}

.features-grid{
  max-width:1000px;
  margin:40px auto;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:40px;
}

.feature-item{
  position:relative;
  background:#fff;
  padding:32px 20px;
  border-radius:16px;
  box-shadow: none;
  border: 1px solid #e5e9f0;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:flex-start;
  height:100%;
  transition:0.25s;
}

.feature-item::before{
  position:absolute;
  top:18px;
  left:22px;
  font-size:42px;
  font-weight:700;
  line-height:1;
  color:#6B82A3;
  opacity:0.18;
}

.feature-item:nth-child(1)::before{
  content:"01";
}
.feature-item:nth-child(2)::before{
  content:"02";
}
.feature-item:nth-child(3)::before{
  content:"03";
}

.feature-item:hover{
  transform:translateY(-6px);
  box-shadow:
    0 20px 45px rgba(0,0,0,0.12),
    0 10px 25px rgba(0,0,0,0.08);
}

.feature-icon{
  position:relative;
  z-index:1;
  height:180px;
  width: 180px;
  object-fit:contain;
  margin-bottom:20px;
}

.feature-item:nth-child(1) .feature-icon {
  transform: scale(0.95);
}

.feature-item:nth-child(2) .feature-icon {
  transform: scale(0.95);
}

.feature-item:nth-child(3) .feature-icon {
  transform: scale(0.92);
}

.feature-item__title{
  position:relative;
  z-index:1;
  font-size:1.2rem;
  margin-bottom:12px;
}

.feature-item__description{
  position:relative;
  z-index:1;
  font-size:clamp(0.9rem, 1vw, 0.95rem);
  line-height:1.7;
}

.features-sub{
  margin-top:40px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:center;
}

.features-sub__item{
  background:#ffffff;
  border:1.5px solid #6B82A3;
  color:#4a5d78;
  padding:8px 16px;
  border-radius:999px;
  font-size:clamp(0.8rem, 0.9vw, 0.85rem);
  font-weight:500;
  box-shadow:0 4px 10px rgba(0,0,0,0.05);
  transition:0.2s;
}

.features-sub__item:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 18px rgba(0,0,0,0.08);
}

.feature-sub__icon{
  margin-right:8px;
}

/* ===== HOW TO USE SECTION ===== */
.howto-section__title-br{
  display: none;
}

.howto-step{
  max-width: 1000px;
  margin: 0 auto;
  position:relative;
  display:flex;
  align-items:center;
  justify-content: center;
  gap: clamp(24px, 4vw, 48px);
  margin-top: 60px;
  margin-bottom: 60px;
}

.howto-step:nth-of-type(even) .howto-text{
  text-align:right;
}
.howto-step:nth-of-type(even) .howto-text__list-item{
  justify-content:flex-end;
}
.howto-step:nth-of-type(even){
  flex-direction:row-reverse;
}

.howto-step::before{
  position:absolute;
  font-size:140px;
  font-weight:700;
  color:#6B82A3;
  opacity:0.12;
  top:-20px;
  left:0;
  transform: translateX(10%);
}

.howto-step:nth-of-type(even)::before{
  left:auto;
  right:0;
  transform: translateX(-10%);
}

.howto-step:nth-of-type(1)::before{
  content:"01";
}
.howto-step:nth-of-type(2)::before{
  content:"02";
}
.howto-step:nth-of-type(3)::before{
  content:"03";
}

.howto-step::after{
  content:"";
  position:absolute;
  width:260px;
  height:260px;
  bottom:20px;
  left:60%;
  transform:translateX(-50%);
  opacity:0.16;
  background-size:contain;
  background-repeat:no-repeat;
  pointer-events:none;
}

.howto-step:nth-of-type(odd)::after{
  left:40%;
}

.howto-step:nth-of-type(even)::after{
  left:65%;
}

.howto-step:nth-of-type(1)::after{
  background-image:url("../images/feature-memo.png");
}
.howto-step:nth-of-type(2)::after{
  background-image:url("../images/feature-setlist.png");
}
.howto-step:nth-of-type(3)::after{
  background-image:url("../images/feature-score.png");
}

.howto-text{
  position:relative;
  max-width:420px;
  text-align:left;
  flex: 0 1 420px;
}

.howto-text__title{
  font-size:1.5rem;
  margin-bottom:18px;
}

.howto-text__description{
  font-size:0.95rem;
  line-height:1.7;
  margin-bottom:18px;
}

.howto-text__list{
  list-style:none;
  padding:0;
  margin-top:18px;
  margin-left:0;
}

.howto-text__list-item{
  margin-bottom:14px;
  line-height:1.7;
  display:flex;
  align-items:center;
  gap:8px;
}

.fa-circle-check{
  color:#6B82A3;
}

.howto-image{
  position:relative;
  z-index:1;
  flex: 0 1 300px;
}

.howto-image__img{
  width:clamp(200px, 26vw, 300px);
  margin-right:0;
  filter: drop-shadow(0 30px 60px rgba(0,0,0,0.14));
  transform:translateY(-20px);
}

/* ===== EXTRA SECTION ===== */
.howto-extra{
  text-align:center;
  margin-top:120px;
}

.howto-extra__title{
  font-size: clamp(1.5rem, 2vw, 1.8rem);
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
}

.howto-extra__sub-title{
  font-size: clamp(1rem, 1.2vw, 1.2rem);
  margin-bottom:40px;
}

.howto-extra__sub-title-br{
  display: none;
}

.howto-extra__grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:60px;
  max-width:900px;
  margin:auto;
  align-items: start;
}

.howto-extra__item{
  text-align: center;
}

.howto-extra__image{
  width:260px;
  margin-bottom: 16px;
}

.howto-extra__item-title{
  font-size:clamp(1.2rem, 1.5vw, 1.5rem);
  margin-bottom: 8px;
}

.howto-extra__description{
  font-size:clamp(0.9rem, 1.2vw, 1.2rem);
  margin-top: 0;
  line-height: 1.6;
}

.howto-extra__list{
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

.howto-extra__list-item{
  font-size:0.95rem;
  line-height:1.7;
  color:#666;
}

.howto-extra__item-title-br{
  display: none;
}

/* ===== CONTACT SECTION ===== */
.contact-section {
  text-align: center;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.contact-card {
  position: relative;
  background: #fff;
  padding: 40px 24px;
  border-radius: 16px;
  width: 720px;
  margin: 40px auto 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.contact-text {
  font-size: clamp(0.8rem, 0.9vw, 0.95rem);
  color: #555;
  margin-bottom: 20px;
}

.contact-text-br{
  display: none;
}

.contact-mail {
  font-size: clamp(1rem, 1.2vw, 1.2rem);
  font-weight: 600;
  margin-bottom: 24px;
}

.contact-button {
  display: inline-block;
  padding: 12px 24px;
  background: #6B82A3;
  color: var(--light-text);
  border-radius: 999px;
  text-decoration: none;
  font-size: clamp(0.8rem, 0.9vw, 0.95rem);
  cursor: pointer;
  border: none;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.contact-button:hover {
  transform: translateY(-2px);
}

.contact-button:active {
  transform: translateY(0);
}

.contact-button-wrap{
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.contact-links__item {
  font-size: clamp(0.8rem, 0.9vw, 0.95rem);
  color: #6B82A3;
  text-decoration: underline;
}

.toast {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translateX(-50%) translateY(4px);

  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 12px;

  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
  z-index: 10;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== DOWNLOAD SECTION ===== */
.download-section {
  background: linear-gradient(160deg, #5E7595 0%, #8FA6C6 100%);
  color: #fff;
  text-align: center;
  padding: 120px 20px;
  min-height: 100svh;
  display: flex;
  align-items: center;
}

.download-section__content {
  justify-content: center;
  align-items: center;
  display: flex;
  flex-direction: column;
}

.download-icon {
  width: 50px;
  margin-bottom: 20px;
  opacity: 0.8;
}

.download-catch {
  font-size: clamp(1.4rem, 2vw, 1.8rem);
  font-weight: 700;
  margin-bottom: 12px;
}


.download-sub {
  font-size: clamp(0.9rem, 1vw, 1rem);
  opacity: 0.9;
  margin-bottom: 28px;
}

.download-sub-br{
  display: none;
}

.download-note {
  margin-top: 16px;
  font-size: clamp(0.8rem, 0.9vw, 0.95rem);
  opacity: 0.8;
}



section:last-of-type {
  min-height: auto;
  height: 100svh;
}

/* ===== RESPONSIVE ===== */
/* Tablet（768px〜1023px） */
@media (max-width: 1024px) {
  /* ===== UTILITY CLASSES ===== */
  .section-title{
    margin-bottom: 32px;
  }

  .section-icon{
    margin-bottom:20px;
  }

  /* ===== HOME SECTION ===== */

  .home-section__content {
    max-width: 960px;
  }

  .home-section__text {
    flex: 1;
    max-width: 420px;
  }

  /* ストアボタン */
  .download-lead {
    margin-top: clamp(16px, 3vw, 20px);
    margin-bottom: clamp(10px, 2vw, 20px);
    font-size: clamp(0.8rem, 1vw, 1rem);
    font-weight: 600;
    letter-spacing: 0.05em;
    color: rgba(255,255,255,0.9);
  }

  .store-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
  }

  .home-section__image {
    flex: 0 1 350px;
  }

  /* スマホモック画像 */
  .home-section__image-img {
    width: 280px;
  }

  /* ===== FEATURES SECTION ===== */
  .features-grid{
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .feature-item:nth-child(3) {
    grid-column: 1 / -1;
    justify-self: center;
  }

  /* ===== HOW TO USE SECTION ===== */
  .howto-step::before {
    left: -10px;
    top: -50px;
    font-size: 100px;
  }

  .howto-step::after{
    width:200px;
    height:200px;
    bottom:20px;
    left:60%;
    transform:translateX(-50%);
  }

  .howto-step:nth-of-type(odd)::after{
    left:40%;
  }

  .howto-step:nth-of-type(even)::after{
    left:55%;
  }

  /* ===== EXTRA SECTION ===== */
  .howto-extra__sub-title-br{
    display: inline;
  }

  .howto-extra__image{
    width:200px;
  }

  .howto-extra__item-title-br{
    display: inline;
  }

  /* ===== CONTACT SECTION ===== */
  .contact-section {
    padding: 80px 20px;

  }

  .contact-card {
    padding: 32px 24px;
    max-width: 500px;
    margin: 40px auto 16px;
  }

  .contact-text {
    margin-bottom: 16px;
  }

  .contact-text-br{
    display: inline;
  }

  .contact-mail {
    margin-bottom: 16px;
  }

  .contact-button {
    padding: 12px 24px;
  }

  section:last-of-type {
    height: auto;
  }

}

/* Mobile（〜767px） */
@media (max-width: 767px) {
  /* ===== UTILITY CLASSES ===== */
  .section-title{
    margin-bottom: 32px;
  }

  .section-icon{
    width:32px;
    opacity:0.7;
  }

  .section__description{
    margin-bottom:16px;
  }

  /* ===== HOME SECTION ===== */
  .home-section__content {
    flex-direction: column;
    gap: 20px;
  }

  .home-section__text {
    margin-bottom: 24px;
    gap: 20px;
  }

  .home-section__sub-title-br {
    display: none;
  }

  .store-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
  }

  .home-section__image-img {
    width: 70%;
    max-width: 260px;
    margin-top: 0;
    transform: translateY(-30px);
  }

  /* ===== ABOUT SECTION ===== */
  .about-section__description {
    max-width: 320px;
    margin: 0 auto;
  }

  /* ===== FEATURES SECTION ===== */
  .features-section__description {
    max-width: 320px;
    margin: 0 auto;
  }

  .features-section__sub-title-br {
    display: inline;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
 }

  .feature-icon {
    height: 130px;
    width: 130px;
    object-fit: contain;
    margin-top: 16px;
    margin-bottom: 0;
  }

  .features-sub {
    flex-direction: column;
    align-items: center;
    margin-top: 32px;
    margin-bottom: 32px;
    gap: 8px;
    padding: 0 16px;
  }

  .features-sub__item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    padding: 4px 12px;
    width: fit-content;
  }

  .feature-sub__icon{
    margin-right:4px;
    font-size:16px;
  }

  /* ===== HOW TO USE SECTION ===== */
  .howto-section__title {
    line-height: 1.4;
  }
  .howto-section__title-br {
    display: inline;
  }

  .howto-step{
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap:24px;
    margin-top:20px;
    margin-bottom:40px;
  }

  .howto-step:nth-of-type(even){
    flex-direction: column; /* row-reverse を打ち消す */
  }
  .howto-step:nth-of-type(even) .howto-text{
    text-align: center;
  }
  .howto-step:nth-of-type(even) .howto-text__list-item{
    justify-content: center;
  }

  .howto-step::before{
    display:block;
    position: static;
    transform: none;
    left: auto;
    right: auto;
    top: auto;
    width:100%;
    font-size: 32px;
    font-weight: 600;
    color: #6B82A3;
    opacity: 0.6;
    margin-bottom: 12px;
    text-align: center;
  }

  .howto-step:nth-of-type(even)::before{
    transform: none;
  }

  .howto-step:nth-of-type(1)::before{
    content:"01";
  }
  .howto-step:nth-of-type(2)::before{
    content:"02";
  }
  .howto-step:nth-of-type(3)::before{
    content:"03";
  }

  .howto-step::after{
    display:none;
  }

  .howto-image{
    order:1;
  }

  .howto-image__img{
    width:200px;
    transform: none;
  }

  .howto-text{
    order:2;
    text-align:center;
    transform: none;
    flex: none;
  }

  .howto-text::before{
    display:none;
  }

  .howto-text::after{
    display:none;
  }

  .howto-text__list{
    display: block;
    text-align: left;
  }

  .howto-text__list-item{
    gap:10px;
    display: block;
    text-align: left;
  }

  .howto-text__list-item:last-child {
    margin-bottom: 0;
  }

  /* ===== EXTRA SECTION ===== */
  .howto-extra{
    margin-top:80px;
  }

  .howto-extra__sub-title{
    margin-bottom:20px;
  }

  .howto-extra__grid{
    grid-template-columns:repeat(1,1fr);
    gap:60px;
    max-width:400px;
  }

  .howto-extra__image{
    width:200px;
    margin-bottom: 16px;
  }

  .howto-extra__item-title{
    margin-bottom: 8px;
  }

  .howto-extra__item-title-br{
    display: inline;
  }

  /* ===== CONTACT SECTION ===== */
  .contact-section {
    height: 100svh;
    margin-top:0px;
    padding: 40px 20px;
    justify-content: center;
    align-items: center;
    display: flex;
    flex-direction: column;
  }

  .contact-card {
    position: relative;
    padding: 20px 16px;
    width: 100%;
    margin: 40px auto 20px;
  }

  .contact-text {
    margin-bottom: 20px;
  }

  .contact-text-br{
    display: inline;
  }

  .contact-mail {
    margin-bottom: 24px;
  }

  .contact-button {
    padding: 8px 16px;
  }

  /* ===== DOWNLOAD SECTION ===== */
  .download-icon {
    width: 50px;
    margin-bottom: 20px;
    opacity: 0.8;
  }

  .download-catch {
    margin-bottom: 12px;
  }

  .download-sub {
    margin-bottom: 16px;
  }

  .download-sub-br{
    display: inline;
  }

  .download-note {
    margin-top: 16px;
  }

  .download-section .store-buttons__item {
    height: 74px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }

  .download-section .store-buttons__item:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 10px 25px rgba(0,0,0,0.25);
  }

  section:last-of-type {
    min-height: auto;
    height: 100svh;
  }

}