@layer base, layout, components, utilities;

/* ============================================================
   Base Layer (Variables & Reset)
   ============================================================ */
@layer base {
    :root {
        --clr-main: #7ebdb4;
        --clr-main-light: #e0f2f1;
        --clr-accent: #fbc02d;
        --clr-accent-soft: #fff9c4;
        --clr-text: #455a64;
        --clr-bg-white: #ffffff;
        --clr-bg-soft: #fbfbfb;
        --fz-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.85rem);
        --fz-base: clamp(0.95rem, 0.9rem + 0.3vw, 1.05rem);
        --fz-md: clamp(1.1rem, 1rem + 0.5vw, 1.4rem);
        --fz-lg: clamp(1.6rem, 1.3rem + 1.5vw, 2.6rem);
        --header-height: 80px;
    }

    /* 全ての要素で幅の計算を崩さない設定（重要） */
    *, *::before, *::after {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'Zen Maru Gothic', sans-serif;
        color: var(--clr-text);
        background-color: var(--clr-bg-white);
        line-height: 1.8;
        margin: 0;
        font-size: var(--fz-base);
        overflow-x: hidden; /* 横揺れ防止 */
    }

    h1, h2, h3, p { margin: 0; }
    ul { list-style: none; padding: 0; margin: 0; }
    a { text-decoration: none; color: inherit; transition: opacity 0.3s; }
    button { cursor: pointer; border: none; background: none; padding: 0; font-family: inherit; }
}

/* ============================================================
   Layout Layer (Structures)
   ============================================================ */
@layer layout {
    .l-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(5px);
        box-shadow: 0 2px 15px rgba(0,0,0,0.05);
        height: var(--header-height);
        display: flex;
        align-items: center;
        width: 100%;
    }

    .l-header__inner {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0 5%;
        max-width: 1200px;
        margin: 0 auto;
        width: 100%;
    }

    .l-section {
        padding: clamp(4rem, 10vw, 8rem) 5%;
        scroll-margin-top: var(--header-height);
    }

    .l-section.is-bg-soft {
        background-color: var(--clr-main-light);
    }

    .l-section.is-bg-accent {
        background-color: var(--clr-accent-soft);
    }

    .l-container {
        max-width: 1100px;
        margin: 0 auto;
    }

    .l-footer {
        text-align: center;
        padding: 3rem;
        background: var(--clr-text);
        color: white;
        font-size: var(--fz-xs);
    }
}

/* ============================================================
   Components Layer (Flat CSS)
   ============================================================ */
@layer components {
    /* Logo - (ゆはれ)を改行せず横並びに */
    .c-logo {
        display: flex;
        align-items: center;
        gap: 12px;
        color: var(--clr-main);
        font-size: var(--fz-md);
        font-weight: 700;
        line-height: 1.1;
    }

    .c-logo__img {
        height: 50px;
        width: auto;
    }

    .c-logo__text span {
        font-size: 0.55em;
        display: inline-block; /* 改行させない */
        font-weight: 400;
        letter-spacing: 0.1em;
        margin-left: 0.3em;
        color: var(--clr-text);
        vertical-align: middle;
    }

    /* Navigation (PC/Mobile) */
    .p-nav__list {
        display: flex;
        align-items: center;
        gap: clamp(1rem, 2vw, 2rem);
    }

    .p-nav__list a:not(.c-btn) {
        font-weight: 700;
    }

    .p-nav__list a:not(.c-btn):hover {
        color: var(--clr-main);
    }

    /* ハンバーガーメニュー (900px以下で適用) */
    @media (max-width: 900px) {
        .p-nav {
            position: fixed;
            top: 0;
            right: -100%; /* 画面外に隠す */
            width: 80%;
            height: 100vh;
            background-color: rgba(255, 255, 255, 0.98);
            padding: 100px 2rem;
            transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 1500;
            box-shadow: -10px 0 30px rgba(0,0,0,0.05);
        }

        .p-nav.is-active {
            right: 0; /* 画面内にスライドイン */
        }

        .p-nav__list {
            flex-direction: column;
            gap: 2.5rem;
        }

        .p-nav__list a:not(.c-btn) {
            font-size: 1.3rem;
        }
    }

    /* Hamburger Button */
    .p-hamburger {
        display: none; /* デスクトップでは隠す */
        width: 44px;
        height: 44px;
        position: relative;
        z-index: 2000;
    }

    @media (max-width: 900px) {
        .p-hamburger { display: block; } /* 900px以下で表示 */
    }

    .p-hamburger span {
        display: block;
        position: absolute;
        left: 10px;
        width: 24px;
        height: 2px;
        background-color: var(--clr-main);
        transition: 0.3s;
    }

    .p-hamburger span:nth-child(1) { top: 15px; }
    .p-hamburger span:nth-child(2) { top: 21px; }
    .p-hamburger span:nth-child(3) { top: 27px; }

    .p-hamburger.is-active span:nth-child(1) { top: 21px; transform: rotate(45deg); }
    .p-hamburger.is-active span:nth-child(2) { opacity: 0; }
    .p-hamburger.is-active span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

    /* Button */
    .c-btn {
        background: var(--clr-main);
        color: white !important;
        padding: 0.7rem 1.6rem;
        border-radius: 50px;
        font-weight: 700;
        font-size: 0.9em;
        box-shadow: 0 4px 10px rgba(126, 189, 180, 0.3);
        display: inline-block;
        text-align: center;
    }

    .c-btn:hover {
        background: var(--clr-text);
        transform: translateY(-2px);
    }

    /* Heroセクション - スタイルを復元しました */
    .p-hero {
        background: linear-gradient(135deg, var(--clr-main-light) 0%, #ffffff 100%);
        height: clamp(400px, 60vh, 600px);
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
    }

    .p-hero__inner {
        padding: 2rem;
    }

    .p-hero__title {
        font-size: var(--fz-lg);
        color: var(--clr-main);
        margin-bottom: 1.5rem;
        line-height: 1.3;
        letter-spacing: 0.05em;
    }

    .p-hero__text {
        opacity: 0.8;
        font-weight: 700;
    }

    /* Concept Section (PC 2カラム / 900px以下 縦並び) */
    .p-concept-flex {
        display: flex;
        align-items: center;
        gap: 40px;
        margin-top: 2rem;
    }

    .p-concept-flex__img {
        flex: 0 0 35%; /* 左側の画像幅を35%に固定 */
    }

    .p-concept-flex__img img {
        width: 100%;
        height: auto;
        border-radius: 20px;
    }

    .p-concept-flex__content {
        flex: 1;
    }

    .p-concept-box {
        background: white;
        padding: 3rem;
        border-radius: 30px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        text-align: left;
    }

    @media (max-width: 900px) {
        .p-concept-flex {
            flex-direction: column;
            gap: 20px;
        }
        .p-concept-flex__img {
            flex: 0 0 100%;
            max-width: 300px; /* スマホではロゴを少し小さく表示 */
            margin: 0 auto;
        }
        .p-concept-box {
            padding: 2rem;
            text-align: center;
        }
    }

    /* Section Title */
    .c-section-title {
        font-size: calc(var(--fz-lg) * 0.7);
        text-align: center;
        margin-bottom: 3.5rem;
        color: var(--clr-main);
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .c-section-title::after {
        content: "";
        width: 50px;
        height: 5px;
        background: var(--clr-accent);
        border-radius: 10px;
        margin-top: 15px;
    }

    /* Service Grid (PC 2カラム固定 / 900px以下 1列) */
    .p-service-flex {
        display: flex;
        flex-wrap: wrap;
        gap: 30px; /* 余白を広めに設定 */
        justify-content: space-between; /* 2列を左右に振り分け */
    }

    .p-service-item {
        background: white;
        padding: 2.5rem;
        border-radius: 24px;
        width: calc(50% - 15px); /* 余白30pxの半分15pxを引く（2カラム固定） */
        box-shadow: 0 5px 20px rgba(0,0,0,0.04);
        border-top: 6px solid var(--clr-main);
        transition: transform 0.3s;
    }

    @media (max-width: 900px) {
        .p-service-item {
            width: 100%; /* 900px以下でカラム落ち */
        }
    }

    .p-service-item:hover { transform: translateY(-5px); }

    .p-service-item h3 {
        color: var(--clr-main);
        font-size: var(--fz-md);
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .p-service-item h3::before {
        content: "●";
        font-size: 0.6em;
        color: var(--clr-accent);
    }

    /* Info Table */
    .p-info-table {
        width: 100%;
        border-collapse: separate;
        border-spacing: 0 10px;
    }

    .p-info-table tr { background: var(--clr-bg-soft); }

    .p-info-table th, .p-info-table td {
        padding: 1.5rem;
        border-radius: 10px;
    }

    .p-info-table th {
        width: 25%;
        text-align: left;
        color: var(--clr-main);
        font-weight: 700;
    }

    @media (max-width: 650px) {
        .p-info-table th, .p-info-table td { display: block; width: 100%; padding: 1rem; }
        .p-info-table th { padding-bottom: 0; }
    }

    /* Contact Card */
    .p-contact-card {
        background: white;
        padding: clamp(2rem, 8vw, 4rem);
        border-radius: 40px;
        text-align: center;
        box-shadow: 0 15px 40px rgba(0,0,0,0.06);
    }

    .p-contact-card__tel {
        font-size: clamp(1.5rem, 5vw, 2.5rem);
        font-weight: 700;
        color: var(--clr-main);
        margin: 0.5rem 0;
    }

    .p-contact-card__mail {
        font-size: 1.1rem;
        color: var(--clr-text);
        font-weight: 700;
    }
}

/* Utilities */
.u-text-center { text-align: center; }