/* =========================
   基本設定
========================= */

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    color: #ffffff;
    background: #060504;

    font-family:
        "Hiragino Mincho ProN",
        "Yu Mincho",
        "YuMincho",
        "Times New Roman",
        serif;
}


/* =========================
   メインエリア
========================= */

.container {
    position: relative;

    width: 100%;
    min-height: 100vh;
    min-height: 100svh;

    padding: 64px 8% 72px;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    text-align: center;
    overflow: hidden;

    background:
        radial-gradient(
            circle at 82% 12%,
            rgba(214, 182, 103, 0.13) 0%,
            transparent 30%
        ),
        radial-gradient(
            circle at 18% 82%,
            rgba(69, 176, 169, 0.08) 0%,
            transparent 38%
        ),
        radial-gradient(
            circle at 50% 120%,
            rgba(120, 84, 42, 0.1) 0%,
            transparent 55%
        ),
        linear-gradient(
            145deg,
            #060504 0%,
            #14100d 45%,
            #231c17 100%
        );
}


/* 和紙のような薄い質感 */

.container::before {
    content: "";

    position: absolute;
    inset: 0;

    opacity: 0.08;
    pointer-events: none;

    background-image:
        radial-gradient(
            rgba(255, 255, 255, 0.08) 0.6px,
            transparent 0.8px
        );

    background-size: 5px 5px;
    mix-blend-mode: soft-light;
}


/* 下部のゴールドライン */

.container::after {
    content: "";

    position: absolute;
    left: 50%;
    bottom: 26px;

    width: 48px;
    height: 1px;

    background:
        linear-gradient(
            90deg,
            transparent,
            #c8a64e,
            transparent
        );

    transform: translateX(-50%);
    opacity: 0.8;
}


/* コンテンツを前面に表示 */

.header,
.copy,
.line-area {
    position: relative;
    z-index: 1;

    width: 100%;
}


/* =========================
   ロゴ
========================= */

.header {
    display: flex;
    justify-content: center;

    margin-bottom: 48px;
}

.header img {
    display: block;

    width: 132px;
    max-width: 42vw;
    height: auto;
}


/* =========================
   コピー部分
========================= */

.copy {
    max-width: 820px;
    text-align: center;
}


/* サービス名 */

.sub-copy {
    max-width: 720px;

    margin: 0 auto 24px;

    color: #c8a64e;

    font-family:
        "Helvetica Neue",
        "Hiragino Kaku Gothic ProN",
        "Yu Gothic",
        sans-serif;

    font-size: 14px;
    font-weight: 500;

    line-height: 1.9;
    letter-spacing: 0.18em;
}


/* メインコピー */

.copy h1 {
    margin: 0;

    font-size: clamp(22px, 2.8vw, 40px);
    font-weight: 400;

    line-height: 1.75;
    letter-spacing: 0.09em;

    text-shadow:
        0 3px 20px rgba(0, 0, 0, 0.55);
}


/* 説明文 */

.description {
    max-width: 700px;

    margin: 32px auto 0;

    color: rgba(255, 255, 255, 0.72);

    font-size: clamp(14px, 1.25vw, 17px);
    line-height: 2;
    letter-spacing: 0.045em;
}


/* =========================
   LINEエリア
========================= */

.line-area {
    max-width: 390px;

    margin-top: 48px;

    text-align: center;
}


/* お問い合わせ案内 */

.line-title {
    margin: 0 0 20px;

    color: #48b5ac;

    font-family:
        "Helvetica Neue",
        "Hiragino Kaku Gothic ProN",
        "Yu Gothic",
        sans-serif;

    font-size: 15px;
    font-weight: 600;

    line-height: 1.8;
    letter-spacing: 0.08em;
}


/* =========================
   LINEボタン
========================= */

.line-btn {
    position: relative;

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

    width: 100%;
    min-height: 62px;

    padding: 17px 54px 17px 34px;

    color: #ffffff;

    background:
        linear-gradient(
            135deg,
            #46b6ad 0%,
            #2f8f88 52%,
            #206b66 100%
        );

    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 7px;

    text-decoration: none;

    font-family:
        "Helvetica Neue",
        "Hiragino Kaku Gothic ProN",
        "Yu Gothic",
        sans-serif;

    font-size: 16px;
    font-weight: 600;

    letter-spacing: 0.1em;

    box-shadow:
        0 12px 30px rgba(0, 0, 0, 0.38),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);

    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease,
        filter 0.25s ease;
}

.line-btn::after {
    content: "→";

    position: absolute;
    right: 24px;

    font-size: 18px;

    transition: transform 0.25s ease;
}

.line-btn:hover {
    transform: translateY(-3px);
    filter: brightness(1.06);

    box-shadow:
        0 16px 40px rgba(0, 0, 0, 0.48),
        0 0 20px rgba(200, 166, 78, 0.2);
}

.line-btn:hover::after {
    transform: translateX(4px);
}

.line-btn:active {
    transform: translateY(0);
}


/* =========================
   フッター
========================= */

.footer {
    padding: 18px 20px;

    color: rgba(200, 166, 78, 0.62);
    background: #060504;

    text-align: center;

    font-family:
        "Helvetica Neue",
        "Hiragino Kaku Gothic ProN",
        "Yu Gothic",
        sans-serif;

    font-size: 11px;
    letter-spacing: 0.14em;
}

.footer p {
    margin: 0;
}


/* =========================
   タブレット・スマホ
========================= */

@media screen and (max-width: 768px) {

    .container {
        min-height: auto;

        padding:
            max(38px, env(safe-area-inset-top))
            22px
            max(48px, env(safe-area-inset-bottom));

        justify-content: flex-start;

        background:
            radial-gradient(
                circle at 88% 8%,
                rgba(214, 182, 103, 0.13) 0%,
                transparent 32%
            ),
            radial-gradient(
                circle at 12% 88%,
                rgba(69, 176, 169, 0.08) 0%,
                transparent 40%
            ),
            radial-gradient(
                circle at 50% 115%,
                rgba(120, 84, 42, 0.1) 0%,
                transparent 54%
            ),
            linear-gradient(
                150deg,
                #060504 0%,
                #14100d 48%,
                #231c17 100%
            );
    }

    .container::after {
        bottom: 20px;
        width: 42px;
    }

    .header {
        margin-bottom: 32px;
    }

    .header img {
        width: 104px;
    }

    .sub-copy {
        max-width: 330px;

        margin-bottom: 18px;

        font-size: 12px;
        line-height: 1.75;
        letter-spacing: 0.1em;
    }

    .copy h1 {
        font-size: clamp(21px, 6.2vw, 28px);

        line-height: 1.65;
        letter-spacing: 0.045em;
    }

    .description {
        max-width: 520px;

        margin-top: 24px;

        font-size: 13px;
        line-height: 1.9;
        letter-spacing: 0.025em;
    }

    .line-area {
        max-width: 350px;

        margin-top: 34px;
    }

    .line-title {
        margin-bottom: 16px;

        font-size: 13px;
        line-height: 1.75;
        letter-spacing: 0.055em;
    }

    .line-btn {
        min-height: 56px;

        padding: 15px 46px 15px 22px;

        font-size: 14px;
        letter-spacing: 0.07em;
    }

    .line-btn::after {
        right: 19px;
    }

    .footer {
        padding: 15px 20px;
    }
}


/* =========================
   小さいスマホ
========================= */

@media screen and (max-width: 390px) {

    .container {
        padding-left: 17px;
        padding-right: 17px;
    }

    .header {
        margin-bottom: 28px;
    }

    .header img {
        width: 96px;
    }

    .sub-copy {
        max-width: 300px;

        margin-bottom: 16px;

        font-size: 11px;
        line-height: 1.7;
    }

    .copy h1 {
        font-size: 20px;
        line-height: 1.65;
    }

    .description {
        margin-top: 22px;

        font-size: 12.5px;
        line-height: 1.85;
    }

    .line-area {
        margin-top: 30px;
    }

    .line-title {
        margin-bottom: 14px;
        font-size: 12.5px;
    }

    .line-btn {
        min-height: 54px;
        font-size: 14px;
    }
}


/* =========================
   高さが低いPC画面
========================= */

@media screen and (max-height: 760px) and (min-width: 769px) {

    .container {
        padding-top: 40px;
        padding-bottom: 48px;
    }

    .header {
        margin-bottom: 34px;
    }

    .description {
        margin-top: 24px;
    }

    .line-area {
        margin-top: 32px;
    }
}