/* ===================================================== */
/* Reset */
/* ===================================================== */

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

html{

    scroll-behavior:smooth;

}

body{

    font-family:
        "Inter",
        "Noto Sans JP",
        sans-serif;

    color:#222;

    background:#ffffff;

    line-height:1.8;

}

img{

    display:block;

    max-width:100%;

}

a{

    color:inherit;

    text-decoration:none;

}

ul{

    list-style:none;

}


/* ===================================================== */
/* Construction Notice */
/* ===================================================== */

.construction{

    width:100%;

    padding:14px 20px;

    text-align:center;

    background:#fff4cc;

    color:#7a5c00;

    font-size:.95rem;

    border-bottom:1px solid #ecd98b;

}


/* ===================================================== */
/* Header */
/* ===================================================== */

header{

    position:sticky;

    top:0;

    z-index:1000;

    background:rgba(255,255,255,.9);

    backdrop-filter:blur(10px);

    display:flex;

    justify-content:space-between;

    align-items:center;

    padding:20px 8%;

    border-bottom:1px solid #ececec;

}

.logo{

    font-size:1.4rem;

    font-weight:700;

    letter-spacing:.03em;

}


/* ===================================================== */
/* Navigation */
/* ===================================================== */

nav{

    display:flex;

    gap:28px;

}

nav a{

    position:relative;

    color:#444;

    transition:.25s;

}

nav a:hover{

    color:#000;

}

nav a.current{

    color:#000;

    font-weight:600;

}

nav a.current::after{

    content:"";

    position:absolute;

    left:0;

    bottom:-6px;

    width:100%;

    height:2px;

    background:#000;

}


/* ===================================================== */
/* Language */
/* ===================================================== */

.language{

    display:flex;

    align-items:center;

    gap:10px;

    font-size:.95rem;

}

.language a{

    color:#666;

    transition:.2s;

}

.language a:hover{

    color:#000;

}

.language .current{

    font-weight:700;

    color:#000;

}

.separator{

    color:#bbb;

}


/* ===================================================== */
/* Hero */
/* ===================================================== */

.hero{

    position:relative;

    height:88vh;

    min-height:650px;

    overflow:hidden;

}

.furigana{
    display:block;
    font-size:0.35em;
    font-weight:normal;
    margin-top:8px;
    letter-spacing:0.1em;
    opacity:0.7;
}

.hero img{

    width:100%;

    height:100%;

    object-fit:cover;

}

.hero-overlay{

    position:absolute;

    inset:0;

    display:flex;

    align-items:center;

    padding:0 8%;

}

.hero-content{

    max-width:620px;

    padding:50px;

    background:rgba(255,255,255,.82);

    backdrop-filter:blur(16px);

    border-radius:20px;

    box-shadow:0 15px 40px rgba(0,0,0,.08);

}

.hero-tag{

    color:#0b6cff;

    font-weight:600;

    letter-spacing:.05em;

    margin-bottom:18px;

}

.hero h1{

    font-size:3.5rem;

    line-height:1.15;

    margin-bottom:20px;

}

.hero-subtitle{

    font-size:1.25rem;

    color:#555;

    margin-bottom:25px;

}

.hero-description{

    color:#666;

    margin-bottom:35px;

}


/* ===================================================== */
/* Hero Buttons */
/* ===================================================== */

.hero-buttons{

    display:flex;

    gap:18px;

}

.primary-button{

    padding:14px 30px;

    border-radius:10px;

    background:#111;

    color:#fff;

    transition:.25s;

}

.primary-button:hover{

    background:#333;

}

.secondary-button{

    padding:14px 30px;

    border-radius:10px;

    border:1px solid #bbb;

    transition:.25s;

}

.secondary-button:hover{

    background:#f5f5f5;

}

/* ===================================================== */
/* Common Container */
/* ===================================================== */

.container{

    width:100%;

    max-width:1200px;

    margin:0 auto;

    padding:0 30px;

}


/* ===================================================== */
/* Section */
/* ===================================================== */

section{

    padding:100px 0;

}

section h2{

    font-size:2.2rem;

    margin-bottom:30px;

    color:#111;

}

section h3{

    margin-bottom:20px;

    color:#222;

}


/* ===================================================== */
/* Research Summary */
/* ===================================================== */

.summary{

    background:#fafafa;

}

.summary-text{

    max-width:850px;

    font-size:1.08rem;

    color:#555;

}


/* ===================================================== */
/* About */
/* ===================================================== */

.about-container{

    display:grid;

    grid-template-columns:320px 1fr;

    gap:70px;

    align-items:center;

}

.about-image img{

    width:100%;
    aspect-ratio:1/1;

    object-fit:cover;

    border-radius:50%;

    box-shadow:0 10px 30px rgba(0,0,0,.08);
    
    display:flex;
    justify-content:center;

}

.about-text p{

    margin-bottom:18px;

    color:#555;

}

.about-text ul{

    margin-top:20px;

    display:grid;

    grid-template-columns:repeat(2,1fr);

    gap:14px;

}

.about-text li{

    background:#f7f7f7;

    padding:14px;

    border-radius:10px;

}


/* ===================================================== */
/* Featured Research */
/* ===================================================== */

.featured{

    background:#fafafa;

}

.research-card{

    display:grid;

    grid-template-columns:420px 1fr;

    gap:40px;

    align-items:center;

    background:white;

    border-radius:18px;

    overflow:hidden;

    box-shadow:0 12px 30px rgba(0,0,0,.08);

    transition:.25s;

}

.research-card:hover{

    transform:translateY(-4px);

}

.research-card img{

    width:100%;

    height:100%;

    object-fit:cover;

}

.research-content{

    padding:40px;

}

.research-content p{

    margin:18px 0;

    color:#555;

}

.read-more{

    display:inline-block;

    margin-top:15px;

    color:#0b6cff;

    font-weight:600;

}


/* ===================================================== */
/* Links */
/* ===================================================== */

.links-grid{

    display:grid;

    grid-template-columns:repeat(3,1fr);

    gap:30px;

    margin-top:30px;

}

.link-card{

    padding:35px;

    background:#fafafa;

    border-radius:15px;

    text-align:center;

    transition:.25s;

}

.link-card:hover{

    transform:translateY(-4px);

    background:#f2f2f2;

}


/* ===================================================== */
/* News */
/* ===================================================== */

.news ul{

    margin-top:20px;

}

.news li{

    padding:18px 0;

    border-bottom:1px solid #e8e8e8;

    color:#555;

}


/* ===================================================== */
/* Footer */
/* ===================================================== */

footer{

    margin-top:80px;

    padding:50px 20px;

    background:#111;

    color:#ccc;

    text-align:center;

}


/* ===================================================== */
/* Responsive */
/* ===================================================== */

@media(max-width:1000px){

    .hero{

        height:auto;

        min-height:auto;

    }

    .hero-overlay{

        position:relative;

        padding:50px 25px;

    }

    .hero-content{

        max-width:100%;

        padding:35px;

    }

    .hero h1{

        font-size:2.6rem;

    }

    .about-container{

        grid-template-columns:1fr;

    }

    .research-card{

        grid-template-columns:1fr;

    }

    .links-grid{

        grid-template-columns:1fr;

    }

}

@media(max-width:700px){

    header{

        flex-direction:column;

        gap:18px;

    }

    nav{

        flex-wrap:wrap;

        justify-content:center;

        gap:18px;

    }

    .hero-buttons{

        flex-direction:column;

    }

    .about-text ul{

        grid-template-columns:1fr;

    }

    section{

        padding:70px 0;

    }

}

/* ===================================================== */
/* Research Page */
/* ===================================================== */

.research-page{

    background:#ffffff;

}


/* Research Header */

.research-header{

    max-width:900px;

    margin:0 auto;

    text-align:center;

    padding-bottom:60px;

}


.research-header h1{

    font-size:3rem;

    margin-bottom:20px;

}


.research-header p{

    color:#666;

    font-size:1.1rem;

}



/* Research List */

.research-list{

    display:flex;

    flex-direction:column;

    gap:30px;

    max-width:1000px;

    margin:0 auto;

}



/* Research Item */

.research-item{

    padding:35px 40px;

    background:#fafafa;

    border-radius:18px;

    border:1px solid #eeeeee;

    transition:.25s;

}


.research-item:hover{

    transform:translateY(-4px);

    box-shadow:0 12px 30px rgba(0,0,0,.08);

}



/* Year / Place */

.research-meta{

    display:flex;

    gap:15px;

    align-items:center;

    margin-bottom:15px;

    color:#666;

    font-size:.95rem;

}


.research-year{

    font-weight:600;

    color:#111;

}


.research-place{

    color:#666;

}



/* Title */

.research-item h2{

    font-size:1.5rem;

    margin-bottom:15px;

    line-height:1.5;

}



/* Description */

.research-item p{

    color:#555;

    margin-bottom:25px;

}



/* Button */

.research-link{

    display:inline-block;

    color:#0b6cff;

    font-weight:600;

}


.research-link:hover{

    text-decoration:underline;

}



/* Responsive */

@media(max-width:700px){


    .research-header h1{

        font-size:2.2rem;

    }


    .research-item{

        padding:25px;

    }


    .research-item h2{

        font-size:1.2rem;

    }


    .research-meta{

        flex-direction:column;

        align-items:flex-start;

        gap:3px;

    }

}