/* --- Base Styles & Color Palette (Light Theme) --- */
:root {
    --font-main: 'Urbanist', 'Noto Sans JP', sans-serif;
    --font-jp: 'Noto Sans JP', sans-serif;
    --color-text-primary: #2c2c2c; /* Charcoal */
    --color-text-secondary: #666666; /* Medium Gray */
    --color-background-card: rgba(255, 255, 255, 0.75); /* Frosted Glass */
    --color-accent: #164af3; /* Deep Forest Green */
    --color-accent-text: #FFFFFF;
    --color-border: rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

.container-head {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}


.header {
    position: absolute; /* fixed（画面固定）から absolute（ページ上部固定）に変更 */
    background: transparent !important; /* スクロールしても背景色が変わらないようにする */
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 1.5rem 0;
    transition: all 0.3s ease-in-out;
    color: white;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}



.header .logo img {
    height: 30px; /* ★お好みのロゴの高さに調整してください */
    width: auto;
    display: block; /* 余白などがつかないように念の為指定 */
    transition: all 0.3s ease; /* スムーズな変化のため */
}




body {
    font-family: var(--font-main);
    color: var(--color-text-primary);
    background-color: #F4F4F4;
    /* ★背景画像をお好みのものに変更してください。白基調に合う明るめの写真がおすすめです */
    background-image: url('src/plans_bg.avif');
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 4rem 1rem;
    position: relative;
    isolation: isolate; /* z-indexの重なり順を制御しやすくするため */
}

body::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
/* ↓ここでシャドウをかけています。数値を調整してお好みの影にしてください */
box-shadow: inset 0px 0px 900px 1000px rgba(0, 0, 0, 0.40);
z-index: -1; /* コンテンツの下に配置 */
}

/* --- Main Container & Intro Text --- */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
}

.intro {
    text-align: center;
    margin-bottom: 3.5rem;
}

.intro h1, .intro p {
    /* ★改善点1: テキストシャドウを追加して可読性を向上 */
    text-shadow: 0px 2px 20px rgba(0, 0, 0, 0.2), 0px 1px 3px rgba(0, 0, 0, 0.1);
}

.intro h1 {
    font-family: var(--font-jp);
    font-size: 2.5rem;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 1rem;
    color: #fff; /* 白文字にして影を活かす */
}

.intro p {
    font-size: 1.1rem;
    max-width: 550px;
    margin: 0 auto;
    color: #efefef; /* やや明るいグレー */
    font-weight: 300;
}

/* --- Pricing Grid --- */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: center;
}

/* --- Pricing Card --- */
.pricing-card {
    background-color: var(--color-background-card);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 8px 32px 0 rgba(0,0,0,0.05);
}

/* Recommended Card Style (for Desktop) */
.pricing-card.recommended {
    transform: scale(1.05);
    border-color: var(--color-accent);
}



.card-header .plan-name {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.card-header .plan-jp-name {
    font-family: var(--font-jp);
    font-size: 1.75rem;
    font-weight: 500;
    margin-top: 0.25rem;
    color: var(--color-text-primary);
}

.card-price {
    font-family: var(--font-main);
    font-size: 3.5rem;
    font-weight: 300;
    color: var(--color-text-primary);
    margin: 1rem 0;
}

.pricing-card.free-plan .card-price {
    margin-top: 0.5rem; /* 上の余白を少しだけ増やして「無料」の文字を下に押し、見た目の間隔を揃える */
}

.card-price .currency {
    font-size: 1.5rem;
    font-weight: 300;
    vertical-align: super;
    margin-right: 0.25rem;
}

.card-features {
    list-style: none;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.card-features li {
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    font-weight: 300;
    font-family: var(--font-jp);
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.card-features li::before {
    content: '✓';
    color: var(--color-accent);
    font-weight: bold;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.card-features li strong {
    font-weight: 500;
    color: var(--color-text-primary);
}

/* --- Buttons --- */
.card-button {
    display: block;
    width: 100%;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.2s ease;
    font-family: var(--font-jp);
}

.button-primary {
    background-color: var(--color-accent);
    color: var(--color-accent-text);
    border: 1px solid var(--color-accent);
}

.button-primary:hover {
    background-color: #2760ff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.button-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.button-secondary:hover {
    background-color: #fff;
    border-color: #ccc;
    transform: translateY(-2px);
}

/* --- Mobile Responsive Styles (Mobile First) --- */
@media (max-width: 992px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        max-width: 480px;
        margin: 0 auto;
    }
    .pricing-card.recommended {
        transform: scale(1); /* Reset scaling for stacked layout */
        /* ★改善点2: orderプロパティを削除し、自然な表示順に戻す */
    }
}

@media (max-width: 768px) {
    body { padding: 3rem 1.5rem; }
    .intro h1 { font-size: 2rem; }
    .intro p { font-size: 1rem; }
    .pricing-card { padding: 2rem; }
    .card-price { font-size: 3rem; }
    .card-header .plan-jp-name { font-size: 1.5rem; }
}