/* ベーススタイル */
:root {
    --color-bg-start: #fce4ec;
    --color-bg-end: #ffffff;
    --color-text-main: #333333;
    --color-text-sub: #666666;
    --color-accent: #a2dec5;
    --color-white: #ffffff;
    --circle-size: 80vh;
    --circle-size-small: 70vh;
    --marker-size: 100px;
    --gear-size: 450px;
   
    /* 番号を円からどれくらい離すか */
    --marker-offset: 60px;
}


body {
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--color-text-main);
    overflow-x: hidden;
    background: linear-gradient(135deg, var(--color-bg-start), var(--color-bg-end));
    min-height: 100vh;
}


.page-wrapper {
    display: flex;
    position: relative;
    /* background: linear-gradient(to right, #F8EDF2, #E8F1F4); */
    z-index: -2;
}


/* --- 左側：回転ホイールエリア --- */
.left-panel {
    position: sticky;
    top: 0;
    width: 35%;
    height: 100vh;
    z-index: 10;
    pointer-events: none;
}


/* コンテナ（画面左端垂直中央） */
.rotating-circle-container {
    position: absolute;
    top: 50%;
    left: 0;
    width: 0;
    height: 0;
}


/* 外円（数字が乗る円） */
.rotating-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: var(--circle-size);
    height: var(--circle-size);
    border-radius: 50%;
    /* 中心を合わせる */
    transform: translate(-50%, -50%);
   
    /* シャドウを削除、ボーダーのみ薄く残す */
    border: 2px solid rgba(255, 255, 255, 0.5);
    /* box-shadow: 0 0 50px rgba(255, 255, 255, 0.5); 削除 */
   
    will-change: transform;
}
.rotating-circle-small {
    position: absolute;
    top: 0;
    left: 0;
    width: var(--circle-size-small);
    height: var(--circle-size-small);
    border-radius: 50%;
    /* 中心を合わせる */
    transform: translate(-50%, -50%);
   
    /* シャドウを削除、ボーダーのみ薄く残す */
    border: 2px solid rgba(255, 255, 255, 0.5);
    /* box-shadow: 0 0 50px rgba(255, 255, 255, 0.5); 削除 */
}

/* 外円のアニメーション用クラス */
.rotating-circle.interactive {
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.rotating-circle.opening-animation {
    animation: wheelEntrance 2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}


@keyframes wheelEntrance {
    0% { transform: translate(-150%, -50%) rotate(-180deg); opacity: 0; }
    100% { transform: translate(-50%, -50%) rotate(0deg); opacity: 1; }
}


/* --- ギア (Center Gear) --- */
.gear-container {
    position: absolute;
    top: 0;
    left: 0;
    width: var(--gear-size);
    height: var(--gear-size);
    transform: translate(-50%, -50%);
   
    pointer-events: none;
    z-index: 5;
   
    will-change: transform;
}


.gear-container.interactive {
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.gear-container.opening-animation {
    animation: gearEntrance 2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}


@keyframes gearEntrance {
    0% { transform: translate(-50%, -50%) rotate(-180deg); opacity: 0; }
    100% { transform: translate(-50%, -50%) rotate(0deg); opacity: 1; }
}


/* レスポンシブ: スマホ時はギアを小さく */
@media (max-width: 768px) {
    :root {
        --gear-size: 200px;
        --marker-offset: 40px; /* スマホ時のオフセット */
    }
}


.gear-container svg {
    width: 100%;
    height: 100%;
    /* filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.8)); 削除 */
}


.gear-path {
    fill: none;
    stroke: #fff;
    stroke-width: 1; /* 線を細く */
    stroke-linejoin: round;
    stroke-linecap: round;
}


/* --- マーカー --- */
.step-marker {
    position: absolute;
    width: var(--marker-size);
    height: var(--marker-size);
    top: 50%;
    left: 50%;
    margin-top: calc(var(--marker-size) / -2);
    margin-left: calc(var(--marker-size) / -2);
    z-index: 10;
}


/* 配置 (60度間隔 + オフセット) */
.marker-1 { transform: rotate(0deg) translate(calc(var(--circle-size) / 2 + var(--marker-offset))); }
.marker-2 { transform: rotate(60deg) translate(calc(var(--circle-size) / 2 + var(--marker-offset))); }
.marker-3 { transform: rotate(120deg) translate(calc(var(--circle-size) / 2 + var(--marker-offset))); }
.marker-4 { transform: rotate(180deg) translate(calc(var(--circle-size) / 2 + var(--marker-offset))); }
.marker-5 { transform: rotate(240deg) translate(calc(var(--circle-size) / 2 + var(--marker-offset))); }
.marker-6 { transform: rotate(300deg) translate(calc(var(--circle-size) / 2 + var(--marker-offset))); }


/* マーカー中身 (逆回転用) */
.marker-content {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    will-change: transform;
}

/* オープニングアニメーション（逆回転） */
.rotating-circle.opening-animation .marker-content {
    animation-duration: 2s;
    animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
    animation-fill-mode: forwards;
}

/* 初期角度補正 */
.marker-1 .marker-content { --initial-angle: 0deg; }
.marker-2 .marker-content { --initial-angle: -60deg; }
.marker-3 .marker-content { --initial-angle: -120deg; }
.marker-4 .marker-content { --initial-angle: -180deg; }
.marker-5 .marker-content { --initial-angle: -240deg; }
.marker-6 .marker-content { --initial-angle: -300deg; }


.rotating-circle.opening-animation .marker-1 .marker-content { animation-name: counterRotate1; }
.rotating-circle.opening-animation .marker-2 .marker-content { animation-name: counterRotate2; }
.rotating-circle.opening-animation .marker-3 .marker-content { animation-name: counterRotate3; }
.rotating-circle.opening-animation .marker-4 .marker-content { animation-name: counterRotate4; }
.rotating-circle.opening-animation .marker-5 .marker-content { animation-name: counterRotate5; }
.rotating-circle.opening-animation .marker-6 .marker-content { animation-name: counterRotate6; }


@keyframes counterRotate1 { 0% { transform: rotate(180deg); } 100% { transform: rotate(0deg); } }
@keyframes counterRotate2 { 0% { transform: rotate(120deg); } 100% { transform: rotate(-60deg); } }
@keyframes counterRotate3 { 0% { transform: rotate(60deg); } 100% { transform: rotate(-120deg); } }
@keyframes counterRotate4 { 0% { transform: rotate(0deg); } 100% { transform: rotate(-180deg); } }
@keyframes counterRotate5 { 0% { transform: rotate(-60deg); } 100% { transform: rotate(-240deg); } }
@keyframes counterRotate6 { 0% { transform: rotate(-120deg); } 100% { transform: rotate(-300deg); } }




.diamond-shape {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--color-white);
    transform: rotate(45deg);
    /* box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); 削除 */
    transition: transform 0.3s ease; /* box-shadow transition 削除 */
}


.number {
    position: relative;
    font-size: 3rem;
    font-weight: bold;
    color: var(--color-accent);
    z-index: 1;
}


.step-marker.active-marker .diamond-shape {
    transform: rotate(45deg) scale(1.2);
    /* box-shadow: 0 0 20px rgba(162, 222, 197, 0.4); 削除（緑の光彩なし） */
    background-color: #fff;
}
.step-marker.active-marker .number {
    color: #4FB086; /* 番号のみ緑 */
}




/* --- 右側：コンテンツエリア --- */
.right-panel {
    width: 60%;
    padding-bottom: 50vh;
}


.content-section {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 50px;
    opacity: 1;
    position: relative;
}

/* Flow: single 100vh viewport; all content-sections stacked in same area, one visible at a time */
.flow-scroll-container .right-panel {
    height: 100vh;
    padding-bottom: 0;
    position: relative;
}

.flow-scroll-container .content-section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.flow-scroll-container .content-section.animate-trigger {
    opacity: 1;
    pointer-events: auto;
}


.step-title-container {
    position: relative;
    display: inline-block;
    margin-bottom: 20px;
    padding: 10px 20px;
    z-index: 1;
}


.step-title-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fff;
    z-index: -1;
    font-weight: bold;
    /* box-shadow: 0 4px 20px rgba(0,0,0,0.05); 削除 */
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}


.content-section.animate-trigger .step-title-container::before {
    transform: scaleX(1);
}


.step-title {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 10px;
    color: var(--color-text-main);
    margin: 0;
    display: inline-block;
    line-height: 1.4;
}


.char-reveal {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}


.content-section.animate-trigger .char-reveal {
    opacity: 1;
    transform: translateY(0);
}


.step-sub {
    font-size: 14px;
    padding: 4px 12px;
    margin-left: 10px;
    vertical-align: middle;
    font-weight: normal;
    opacity: 0;
    transition: opacity 0.5s ease 1s;
}
.content-section.animate-trigger .step-sub {
    opacity: 1;
}


.step-description {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--color-text-sub);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    transition-delay: 0.8s;
}


.content-section.animate-trigger .step-description {
    opacity: 1;
    transform: translateY(0);
}


.bg-flow-text {
    position: fixed;
    right: 100px;
    top: 50%;
    transform: translateX(50%) translateY(-50%) rotate(-90deg);
    transform-origin: center;
    font-size: min(15rem, 20vw);
    font-weight: 900;
    color: rgba(255, 255, 255, 0.4);
    white-space: nowrap;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    user-select: none;
    font-family: "Outfit";
}

.bg-flow-text.is-visible {
    opacity: 1;
  }

.section-title {
    position: fixed;
    right: 50px;
    top: 80px;
    font-size: 30px;
    font-weight: bold;
    font-family: "Zen Kaku Gothic New";
    color: #4E4E4E;
    text-align: right;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    transition: opacity 0.3s ease;
    user-select: none;
    padding-left: 100px;
    z-index: 100;
}

.section-title.is-visible {
    opacity: 1;
}

@media (max-width: 1280px) {
    :root {
        --circle-size: 60vh;
        --circle-size-small: 50vh;
        --gear-size: 300px;
        --marker-offset: 40px;
        --marker-size: 80px;
    }
}

@media (max-width: 768px) {
    .section-title {
        right: 50px;
        top: 60px;
        font-size: 24px;
    }

    .step-title {
        font-size: 24px;
        font-weight: bolder;
    }
    .marker-content {
        width: 50px;
        height: 50px;
    }
    .number {
        font-size: 30px;
    }
    :root {
        --circle-size: 50vh;
        --circle-size-small: 40vh;
        --gear-size: 200px;
        --marker-offset: 40px;
        --marker-size: 80px;
    }
}

@media (max-width: 425px) {
    .step-title {
        font-size: 18px;
        letter-spacing: 2px;
    }
    .step-sub {
        font-size: 12px;
    }
    .step-description {
        font-size: 14px;
    }
    .section-title {
        right: 20px
    }
    :root {
        --circle-size: 50vh;
        --circle-size-small: 40vh;
        --marker-size: 100px;
        --gear-size: 200px;
    }
    .rotating-circle-container {
        left: -150px;
    }
    .content-section {
        padding: 0;
    }
    .study-title {
        font-size: 20px;
        letter-spacing: 2px;
        position: absolute;
    }
}