/* ==========================
   Root Variables
========================== */

:root {

    /* Colors */
    --color-primary: #3366C2;
    --color-primary-dark:#3E6F9E;
    --color-primary-light: #eef5ff;

    --color-text: #222222;
    --color-text-secondary: #666666;
    --color-text-light: #777777;

    --color-heading: #1f2937;

    --color-bg: #ffffff;
    --color-bg-soft: #f9fbff;

    --color-border: #eeeeee;

    /* Shadow */
    --shadow-sm:
        0 8px 24px rgba(0, 0, 0, .04);

    --shadow-md:
        0 16px 40px rgba(57, 57, 57, 0.07);

    --shadow-header:
        0 8px 20px rgba(0, 0, 0, .05);

    /* Radius */
    --radius-sm: 16px;
    --radius-md: 24px;
    --radius-lg: 40px;
    --radius-round: 999px;

    /* Transition */
    --transition: .3s ease;
}


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

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP',sans-serif;
    color: var(--color-text);
    background:
        /* 左上の光 */
        radial-gradient(
            circle at 15% 10%,
            rgba(255,255,255,.9) 0%,
            rgba(255,255,255,0) 30%
        ),
        /* 右上の青い光 */
        radial-gradient(
            circle at 85% 15%,
            rgba(215,230,255,.8) 0%,
            rgba(215,230,255,0) 35%
        ),
        /* 中央の柔らかい光 */
        radial-gradient(
            circle at 50% 40%,
            rgba(255,255,255,.6) 0%,
            rgba(255,255,255,0) 40%
        ),
        /* 左下の青白い光 */
        radial-gradient(
            circle at 10% 85%,
            rgba(225,235,255,.8) 0%,
            rgba(225,235,255,0) 30%
        ),
        /* 右下の光 */
        radial-gradient(
            circle at 90% 90%,
            rgba(255,255,255,.8) 0%,
            rgba(255,255,255,0) 30%
        ),
        /* オーロラ */
        radial-gradient(
            circle at 80% 75%,
            rgba(220,240,255,.35) 0%,
            rgba(220,240,255,0) 25%
        ),

        radial-gradient(
            circle at 25% 60%,
            rgba(240,245,255,.4) 0%,
            rgba(240,245,255,0) 30%
        ),
        /* ベース */
        linear-gradient(
            180deg,
            #edf5ff 0%,
            #f8fbff 50%,
            #ffffff 100%
        );
    background-attachment: fixed;
    line-height: 1.8;
}

body::before{
    content:"";
    position:fixed;
    top:-300px;
    right:-250px;
    width:800px;
    height:800px;
    border-radius:50%;
    background:
        radial-gradient(
            circle,
            rgba(255,255,255,.9),
            rgba(255,255,255,0)
        );
    filter:blur(80px);
    z-index:-1;
    pointer-events:none;
}

body::after{
    content:"";
    position:fixed;
    bottom:-250px;
    left:-250px;
    width:700px;
    height:700px;
    border-radius:50%;
    background:
        radial-gradient(
            circle,
            rgba(220,235,255,.9),
            rgba(220,235,255,0)
        );
    filter:blur(100px);
    z-index:-1;
    pointer-events:none;
}

img {
    width: 100%;
    display: block;
}

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


ul {
    list-style: none;
}

.container {
    width: min(1200px,calc(100% - 40px));
    margin: 0 auto;
}

.section {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(170,190,230,.08);
}
.works{
    margin: 0px 20px 20px;
    border-radius: 40px;
    background:
    rgba(255,255,255,.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,.7);
    box-shadow: 0 20px 60px rgba(180,200,240,.18);
}
.about,
.flow,
.contact{
    margin: 20px 20px;
    border-radius: 40px;
    background:
    rgba(255,255,255,.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,.7);
    box-shadow: 0 20px 60px rgba(180,200,240,.18);
}


/* ==========================
   Typography
========================== */

.section-heading {
    margin-bottom: 50px;
    text-align: center;
}

.section-heading.center {
    text-align: center;
}

.section-en {
    display: inline-block;

    font-family:
        'Montserrat',
        sans-serif;

    font-size: 14px;
    letter-spacing: .15em;

    color:
        var(--color-primary);

    margin-bottom: 12px;
}

.section-heading h2 {
    font-size: 36px;
    font-weight: 700;

    color:
        var(--color-heading);
}

.contact-bg-text {
    position: absolute;
    top: 120px;
    left: 80px;
    font-size: 82px;
    opacity: .12;
    font-family: "Allura", cursive;
    color: var(--color-primary);
    letter-spacing: .06em;
    transform: rotate(-10deg);
    z-index: 1;
}
.contact::before {
    content: "";
    position: absolute;
    top: -120px;
    left: -120px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(94,143,199,.06);
}
.contact-blob-1 {
    position: absolute;
    width: 420px;
    height: 380px;
    right: 120px;
    top: 180px;
    background: rgba(94,143,199,.06);
    border-radius: 35% 65% 60% 40% / 60% 35% 65% 40%;
}
.contact-dots {
    position: absolute;
    top: 120px;
    right: 100px;
    width: 140px;
    height: 140px;
    background-image: radial-gradient(rgba(94,143,199,.22) 3px, transparent 3px);
    background-size: 18px 18px;
    opacity: .5;
}


/* ==========================
   Button
========================== */

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: #fff;
    padding: 16px 36px;
    border-radius: var(--radius-round);
    font-weight: 500;
    transition: var(--transition);
}

.btn-primary:hover {
    transform:
        translateY(-3px);

    background:
        var(--color-primary-dark);
}


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

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background:rgba(255, 255, 255, .9);
    backdrop-filter:blur(10px);
    z-index: 999;
    border-bottom:3px solid #f0f0f0;
}

.header.scrolled {
    background:rgba(255, 255, 255, .96);
    box-shadow:var(--shadow-header);
}

.header-inner {
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo img {
    width: 48px;
}

.logo span {
    font-family: "Noto Serif JP", serif;
    font-size: 20px;
    font-weight: 600;
}


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

.nav-list {
    display: flex;
    gap: 32px;
}
.nav-list a {
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: var(--transition);
}
.nav-list a:hover {
    opacity: .5;
}
.nav-list a.active {
    opacity: 1;
}
.nav-list .en {
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing:.02em;
    transition:.3s;
}
.nav-list .jp {
    font-size: 12px;
    color: var(--color-text-light);
}
.nav-list a.active .en {
    color: #619bec;
    font-weight:700;
}


/* ==========================
Contact Page
========================== */

.contact-page{
    position:relative;
    overflow:hidden;
    padding-top: 160px;
}

.contact-page .container{
    position:relative;
    z-index:2;
}

.contact-form-card,
.contact-info-box{
    background:rgba(255,255,255,.58);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border:1px solid rgba(255,255,255,.75);
    border-radius:32px;
    box-shadow:0 16px 40px rgba(140,160,210,.08);
}

.contact-form-card{
    /* margin-top:72px; */
    padding:56px;
    max-width:1100px;

    margin:70px auto;

}

.form-card-header{
    text-align:center;
    margin-bottom:48px;
}

.form-title{
    font-size:2rem;
    color:var(--color-heading);
    margin-bottom:12px;
}

.form-description{
    color:var(--color-text);
    line-height:1.9;
}

.form-row{
    display:grid;
    grid-template-columns:240px 1fr;
    gap:40px;
    align-items:start;
    padding:22px 0;
    border-bottom:1px solid rgba(31,41,55,.08);
}

.form-row:last-of-type{
    border-bottom:none;
}

.form-label{
    display:flex;
    align-items:center;
    gap:12px;
    font-weight:700;
    color:var(--color-heading);
}

.required,
.optional{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-width:48px;
    height:24px;
    border-radius:999px;
    font-size:.75rem;
}

.required{
    background:#4e7cff;
    color:#fff;
}

.optional{
    background:#eef2f7;
    color:#667085;
}

.form-input input,
.form-input select,
.form-input textarea{
    width:100%;
    padding:16px 20px;

    border:1px solid rgba(255,255,255,.65);
    border-radius:18px;

    background:rgba(255,255,255,.72);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);

    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.65),
        0 6px 20px rgba(94,143,199,.08);

    font:inherit;
    color:var(--color-text);

    transition:
        border-color .35s ease,
        box-shadow .35s ease,
        background .35s ease,
        transform .25s ease;
}

.form-input select{

    appearance:none;
    -webkit-appearance:none;

    background-image:
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%235E8FC7' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");

    background-repeat:no-repeat;
    background-position:right 18px center;

    padding-right:56px;

}

.form-input textarea{

    min-height:260px;

    line-height:1.9;

}

.form-input input::placeholder,
.form-input textarea::placeholder{

    color:#B4BCCB;

    transition:.3s;

}

.form-input input:focus::placeholder,
.form-input textarea:focus::placeholder{

    opacity:.45;

}

.form-input input:focus,
.form-input select:focus,
.form-input textarea:focus{

    outline:none;

    background:rgba(255,255,255,.95);

    border-color:#72A8FF;

    box-shadow:
        0 0 0 5px rgba(111,168,255,.14),
        0 18px 35px rgba(111,168,255,.16);

    transform:translateY(-2px);

}

.form-input input:hover,
.form-input select:hover,
.form-input textarea:hover{

    border-color:rgba(111,168,255,.35);

}

.form-agreement{
    display:flex;
    align-items:center;
    gap:12px;
    margin-top:36px;
}

.form-agreement-group{
    margin-top: 36px;
}

.agreement-error{
    margin-top: 8px;
    padding-left: 30px;
    text-align: left;
}

.form-agreement input{
    width:18px;
    height:18px;
}

.form-agreement a,
.contact-mail a{
    color:var(--color-primary);
    text-decoration:none;
}

.form-submit{
    text-align:center;
    margin-top:40px;
}

.form-submit .contact-btn{

    display:inline-flex;
    justify-content:center;
    align-items:center;

    width:360px;
    height:72px;

    border:none;
    border-radius:20px;

    background:linear-gradient(
        180deg,
        #6FA8FF,
        #4E7CFF
    );

    color:#fff;
    font-size:18px;
    font-weight:700;

    cursor:pointer;

    box-shadow:
        0 18px 35px rgba(78,124,255,.28);

    transition:.35s;
}

.form-submit .contact-btn:hover{

    transform:translateY(-4px);

    box-shadow:
        0 26px 45px rgba(78,124,255,.35);

}

.form-submit .contact-btn:active{

    transform:translateY(-1px);

}

.contact-info-box{
    margin-top:64px;
    padding:40px 48px;
}

.contact-info-box h2{
    margin-bottom:24px;
    color:var(--color-heading);
}

.contact-info-list{
    display:grid;
    grid-template-columns:repeat(2, 1fr);
    gap:20px 40px;

    margin:32px 0;
    padding:0;
}

.contact-info-list li{

    display:flex;
    align-items:center;

    position:relative;

    padding-left:28px;

    line-height:1.7;
}

.contact-info-list li::before{

    content:"✓";

    position:absolute;

    left:0;

    color:var(--color-primary);

    font-weight:700;

    font-size:16px;

}

.contact-mail{
    line-height:1.9;
}

@media (max-width:768px){

.contact-form-card{
    padding:32px 24px;
}

.form-row{
    grid-template-columns:1fr;
    gap:16px;
    padding:18px 0;
}

.form-label{
    justify-content:flex-start;
}

.form-submit .contact-btn{
    width:100%;
    min-width:0;
}

.contact-info-box{
    padding:32px 24px;
}

.contact-info-list{

    grid-template-columns:1fr;

    gap:16px;

}

}

/* ==========================
Error Message
========================== */

.error-message{
    display:block;
    width:100%;

    margin:8px 0 0;
    padding:0;

    text-align:left;

    font-size:.875rem;
    color:#E25B6A;
    line-height:1.5;

    min-height:20px;
}

.input-error{

    border-color:#E25B6A !important;

    box-shadow:
        0 0 0 4px rgba(226,91,106,.12);

}

.agreement-error{

    margin-top:10px;

    margin-left:0;

    padding-left:0;

    color:#E25B6A;

    font-size:.875rem;

    text-align:left;

}








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

.footer {
    padding: 32px;

    text-align: center;

    border-top:
        1px solid var(--color-border);

    color:
        var(--color-text-light);

    font-size: 14px;
}


/* ==========================
   Hamburger
========================== */

.hamburger {
    display: none;

    border: none;
    background: none;

    cursor: pointer;
}

.hamburger span {
    display: block;

    width: 28px;
    height: 2px;

    background:
        var(--color-text);

    transition:
        var(--transition);
}


/* ==========================
   Fade Animation
========================== */

.section,
.work-card,
.value-card,
.flow-item {
    opacity: 0;
    transform: translateY(40px);
    transition:
        opacity .8s ease,
        transform .8s ease;
}

.show {
    opacity: 1;
    transform: translateY(0);
}

.flow-item {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity .8s ease, transform .8s ease;
}

.flow-item.is-visible {
    opacity: 1;
    transform: translateY(0);
}


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

@media (max-width: 960px) {

    .nav {
        position: fixed;

        top: 90px;
        right: -100%;

        width: 300px;
        height:
            calc(100vh - 90px);

        background:
            var(--color-bg);

        padding: 40px;

        transition:
            .4s ease;

        box-shadow:
            -10px 0 30px rgba(0, 0, 0, .08);
    }

    .nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 24px;
    }

    .nav-list a {
        align-items: flex-start;
    }

    .hamburger {
        display: flex;

        flex-direction: column;

        gap: 5px;
    }
}