/* Resets & Variables */
:root {
    --color-text: #333;
    --color-white: #fff;
    --color-black: #000;
    --color-gray-400: #9ca3af;
    --color-stone-50: #fafaf9;
    --color-stone-100: #f5f5f4;
    --color-stone-200: #e7e5e4;
    --color-stone-300: #d6d3d1;
    --color-stone-600: #57534e;
    --color-stone-800: #292524;

    --font-base: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;

    --width-pc: 1140px;
    /* 1170px - 30px padding */
    --breakpoint-sp: 768px;
}

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

body {
    font-family: var(--font-base);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s;
}

a:hover {
    opacity: 0.7;
}

/* Utilities */
.l-container {
    max-width: var(--layout-width, 1170px);
    margin: 0 auto;
    padding: 0 var(--space-base, 15px);
}

.l-main {
    min-height: 100vh;
}

.u-overflow-hidden {
    overflow: hidden;
}

.u-hidden-mobile {
    @media (max-width: 767px) {
        display: none !important;
    }
}

.u-section-py {
    padding-top: var(--space-section-sp, 56px);
    padding-bottom: var(--space-section-sp, 56px);

    @media (min-width: 768px) {
        padding-top: var(--space-section-pc, 100px);
        padding-bottom: var(--space-section-pc, 100px);
    }
}

.u-mt-20 {
    margin-top: 20px;
}

.u-delay-100 {
    animation-delay: 100ms;
}

.u-pc-only {
    display: block;

    @media (max-width: 767px) {
        display: none;
    }
}

.u-sp-only {
    display: none;

    @media (max-width: 767px) {
        display: block;
    }
}

/* 1. Page Header */
.page-header {
    position: relative;
    width: 100%;
    padding-top: 6rem;
    /* pt-24 */
    padding-bottom: 4rem;
    /* pb-16 */
    text-align: center;
    overflow: hidden;
    background-image: url('../../img/catalog-contact/header-bg.jpg');
    background-size: cover;
    background-position: center;

    @media (min-width: 768px) {
        padding-top: 8rem;
        /* md:pt-32 */
        padding-bottom: 5rem;
        /* md:pb-20 */
    }
}

.page-header__overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.page-header__content {
    position: relative;
    z-index: 2;
    max-width: var(--width-pc);
    margin: 0 auto;
    padding: 0 15px;
}

.page-header__subtitle {
    color: rgba(255, 255, 255, 0.5);
    font-size: 2.25rem;
    /* text-4xl */
    font-weight: 300;
    /* font-light */
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;

    @media (min-width: 768px) {
        font-size: 3.75rem;
        /* md:text-6xl */
    }
}

.page-header__title-wrapper {
    position: relative;
    display: inline-block;
}

.page-header__title {
    color: var(--color-white);
    font-size: 16px;
    font-weight: 500;
    line-height: 24px;
    letter-spacing: 0.1em;
}

.page-header__line {
    width: 3rem;
    /* w-12 */
    height: 1px;
    background-color: var(--color-white);
    margin: 1.5rem auto 0;
}



/* 3. Main Content */
.main-content {
    max-width: 896px;
    /* max-w-4xl */
    margin: 0 auto;
    padding: 3rem 15px 6rem;
    /* pt-12 pb-24 */
}

/* Concept Section */
.concept {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    /* gap-12 */
    margin-bottom: 5rem;
    /* mb-20 */

    @media (min-width: 768px) {
        flex-direction: row;
        gap: 4rem;
        /* md:gap-16 */
    }
}

.concept__desc {
    text-align: left;

    @media (min-width: 768px) {
        width: 50%;
    }
}

.concept__text {
    font-size: 0.875rem;
    /* text-sm */
    color: var(--color-stone-600);
    line-height: 2;
    /* leading-loose */
    letter-spacing: 0.05em;

    @media (min-width: 768px) {
        font-family: var(--font-base);
        font-weight: 500;
        font-size: 16px;
        line-height: 24px;
        letter-spacing: 0.1em;
    }
}

.concept__image {
    width: 100%;

    @media (min-width: 768px) {
        width: 50%;
    }
}

.concept__image-placeholder {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 2;
    background-color: var(--color-stone-50);
    border: 1px solid var(--color-stone-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    /* shadow-sm */
}

.concept__image-content {
    text-align: center;
    padding: 1rem;
}

.concept__icon {
    font-size: 1.5rem;
    /* text-2xl */
    color: var(--color-stone-200);
    margin-bottom: 0.5rem;
}

.concept__label {
    color: var(--color-stone-300);
    font-size: 10px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

/* Form Section（page-contactと同様） */
.form-section {
    max-width: 768px;
    margin: 0 auto;
}

.form-wrapper {
    text-align: left;
}