/* Variables */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --accent-color: #000000;
    --secondary-color: #f4f4f4;
    --transition-speed: 0.4s;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navigation Logic (Page Switching) */
input[name="nav"] {
    display: none;
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--secondary-color);
    background: linear-gradient(120deg, #fff100, #22ac38);
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
}

.logo {
    font-weight: 700;
    letter-spacing: 2px;
    font-size: 1.2rem;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    color: #fff;
}

.nav-links label {
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 400;
    transition: color var(--transition-speed);
    position: relative;
    padding: 0.5rem 0;
}

.nav-links label:hover {
    color: #888;
}

.nav-links label::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-color);
    transition: width var(--transition-speed);
}

/* Page Display Control */
.thanks p {
    position: relative;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #fff100;
    background-color: white;
    color: #333631;
    font-weight: bold;
    font-size: 21px;
    text-align: center;
    padding: 50px 0px 20px 0px;
}

.thanks p::before {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) skew(-25deg);
    height: 20px;
    width: 10px;
    border-right: 3px solid #fff100;
    background-color: white;
    content: "";
}

.page {
    display: none;
    padding: 120px 2rem 50px;
    max-width: 1000px;
    margin: 0 auto;
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.thanks {
    text-align: center;
}

.thanks img {
    width: 40%;
    margin-top: 50px;
}

/* Active Tab Underline */
#tab-top:checked~nav label[for="tab-top"]::after,
#tab-work1:checked~nav label[for="tab-work1"]::after,
#tab-work2:checked~nav label[for="tab-work2"]::after,
#tab-work3:checked~nav label[for="tab-work3"]::after {
    width: 100%;
}

/* Switch Pages */
#tab-top:checked~#page-top,
#tab-work1:checked~#page-work1,
#tab-work2:checked~#page-work2,
#tab-work3:checked~#page-work3 {
    display: block;
}


/* --- Home Page (Hero & Grid) --- */

h1 {
    background: #fff;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: #dbebc4;
    /* 元の背景色 */
    padding: 60px 20px;
    margin-bottom: 3rem;
    border-radius: 12px;
    text-align: center;
}

.hero img {
    height: auto;
}



/* --- Detail Page Layout --- */
.work-detail-header {
    margin-bottom: 3rem;
}

.work-detail-header h2 {
    font-size: 2rem;
    margin: 0.5rem 0;
}

.tag {
    background: var(--secondary-color);
    padding: 0.2rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    display: inline-block;
}

/* --- work-visual Slider --- */
.work-visual {
    width: 100%;
    height: 600px;
    margin-bottom: 3rem;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    background: #f9f9f9;
    border: 1px solid #eee;
}

.slider-input {
    display: none;
}

.slides {
    display: flex;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.slide {
    flex: 0 0 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: #dbebc4;
}

.slide img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Slider Movement */
#s1-1:checked~.slides,
#s2-1:checked~.slides {
    transform: translateX(0);
}

#s1-2:checked~.slides,
#s2-2:checked~.slides {
    transform: translateX(-100%);
}

#s1-3:checked~.slides,
#s2-3:checked~.slides {
    transform: translateX(-200%);
}

#s3-1:checked~.slides {
    transform: translateX(0);
}

#s3-2:checked~.slides {
    transform: translateX(-100%);
}

/* Navigation Arrows */
.slider-nav {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.slider-nav label {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    pointer-events: auto;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: background 0.3s;
    font-size: 1.2rem;
}

.slider-nav label:hover {
    background: #fff;
}

.slider-nav .prev {
    left: 20px;
}

.slider-nav .next {
    right: 20px;
}

/* Arrow Display Logic */
#s1-1:checked~.slider-nav label.next-1-2 {
    display: flex;
}

#s1-2:checked~.slider-nav label.prev-1-1 {
    display: flex;
}

#s1-2:checked~.slider-nav label.next-1-3 {
    display: flex;
}

#s1-3:checked~.slider-nav label.prev-1-2 {
    display: flex;
}

#s2-1:checked~.slider-nav label.next-2-2 {
    display: flex;
}

#s2-2:checked~.slider-nav label.prev-2-1 {
    display: flex;
}

#s2-2:checked~.slider-nav label.next-2-3 {
    display: flex;
}

#s2-3:checked~.slider-nav label.prev-2-2 {
    display: flex;
}

#s3-1:checked~.slider-nav label.next-3-2 {
    display: flex;
}

#s3-2:checked~.slider-nav label.prev-3-1 {
    display: flex;
}

/* Dot Indicators */
.dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 5;
}

.dots label {
    width: 8px;
    height: 8px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
}

#s1-1:checked~.dots label[for="s1-1"],
#s1-2:checked~.dots label[for="s1-2"],
#s1-3:checked~.dots label[for="s1-3"],
#s2-1:checked~.dots label[for="s2-1"],
#s2-2:checked~.dots label[for="s2-2"],
#s2-3:checked~.dots label[for="s2-3"],
#s3-1:checked~.dots label[for="s3-1"],
#s3-2:checked~.dots label[for="s3-2"] {
    background: var(--accent-color);
    transform: scale(1.2);
}

/* --- Footer & Others --- */

footer p {
    color: #fff;
}


.work-content {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 3rem;
}

.meta-info h4 {
    font-size: 0.7rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.meta-info p {
    margin-bottom: 1.5rem;
}

.description h4 {
    font-size: 0.7rem;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid #888;
    padding-bottom: 10px;
}

.description p {
    margin-bottom: 1.5rem;
}

footer {
    text-align: center;
    padding: 4rem 0;
    color: #999;
    border-top: 1px solid var(--secondary-color);
    margin-top: 4rem;
    background: linear-gradient(120deg, #22ac38,#fff100);
}

.placeholder-box {
    background: #f0f6da;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #bbb;
}


/* --- scroll-section --- */

.wrapper {
    max-width: 1200px;
    /* 他セクションと同じ制限 */
    margin: 0 auto;
}

.full-bg {
    height: 80px;
    width: 100vw;
    /* ← ビューポート基準 */
    margin-left: calc(50% - 50vw);
    /* ← 枠外へ広げる魔法 */

    background-image: url(../img/bg.png);
    background-repeat: repeat-x;
    background-position: 0 0;

    animation: bg-scroll 50s linear infinite;

    height: 213px;
    /* 71px × 3 */
    background-repeat: repeat-x;
    background-size: 4113px 213px;
    /* 1371px × 3 / 71px × 3 */
    margin-top: -50px;
}


@keyframes bg-scroll {
    from {
        background-position: 0 0;
    }

    to {
        background-position: -4113px 0;
        /* 横幅も3倍 */
    }
}





/* --- レスポンシブ --- */


@media (max-width: 768px) {
    .work-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .work-visual {
        height: 450px;
    }

    .page {
        padding-top: 100px;
    }

    .thanks p {
        font-size: 18px;
    }



    .hero img {
        width: 100%;
        height: auto;
        display: block;
    }

    .full-bg {

        animation: bg-scroll 30s linear infinite;

        height: 71px;
        background-repeat: repeat-x;
        background-size: 1371px 71px;
        margin-top: -50px;
    }


    @keyframes bg-scroll {
        from {
            background-position: 0 0;
        }

        to {
            background-position: -1371px 0;
        }
    }

    .thanks img {
        width: 80%;
    }

    footer{
        padding: 50px 30px;
    }
}