/* shop.css — Coming Soon page (shop.html)
   Issue #228: インライン <style> を外部 CSS 化（CSP style-src 'self' 準拠）
   本ファイルは shop.html の準備中ページ専用スタイル。 */

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

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #111111;
    color: #ffffff;
    font-family: 'Noto Sans JP', sans-serif;
    overflow: hidden;
    position: relative;
}

/* Subtle radial background glow */
body::before {
    content: '';
    position: fixed;
    top: 50%;
    left: 50%;
    width: 120vmax;
    height: 120vmax;
    transform: translate(-50%, -50%);
    background: radial-gradient(
        ellipse at center,
        rgba(0, 164, 81, 0.04) 0%,
        rgba(17, 17, 17, 0) 60%
    );
    pointer-events: none;
    z-index: 0;
}

.coming-soon-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    max-width: 680px;
    width: 100%;
}

/* Logo */
.logo {
    width: 260px;
    margin-bottom: 4rem;
    opacity: 0.92;
}

.logo img {
    width: 100%;
    height: auto;
    display: block;
}

/* Heading */
.heading {
    font-family: 'Montserrat', sans-serif;
    font-weight: 300;
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: #ffffff;
    margin-bottom: 1.2rem;
    line-height: 1.2;
}

/* Animated gradient line */
.gradient-line {
    width: 120px;
    height: 2px;
    margin: 0 auto 2.4rem;
    border-radius: 2px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        #00a451 20%,
        #00d468 50%,
        #00a451 80%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Subtitle */
.subtitle {
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 300;
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: rgba(255, 255, 255, 0.55);
    letter-spacing: 0.15em;
    margin-bottom: 3.5rem;
}

/* Back button */
.back-button {
    display: inline-block;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    text-decoration: none;
    color: #ffffff;
    background-color: #00a451;
    padding: 0.9rem 2.6rem;
    border-radius: 0;
    position: relative;
    overflow: hidden;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.back-button:hover {
    background-color: #00c05e;
    transform: translateY(-1px);
}

.back-button:active {
    transform: translateY(0);
}

/* Pulsing dot accent */
.pulse-dot {
    width: 6px;
    height: 6px;
    background-color: #00a451;
    border-radius: 50%;
    margin: 3rem auto 0;
    animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.6);
    }
}

/* Footer */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    padding: 1.5rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.2);
    z-index: 1;
}

/* Responsive */
@media (max-width: 480px) {
    .logo {
        width: 180px;
        margin-bottom: 3rem;
    }

    .heading {
        letter-spacing: 0.2em;
    }

    .subtitle {
        margin-bottom: 2.5rem;
    }

    .back-button {
        padding: 0.8rem 2rem;
        font-size: 0.75rem;
    }

    .gradient-line {
        width: 80px;
    }
}