:root {
    --bg-color: #fdfcf9; /* より温かみのあるオフホワイト */
    --text-main: #2c2c2c; /* 柔らかいチャコール */
    --accent-color: #f08b74; /* サーモン・コーラル（小杉湯となりのアクセント） */
    --secondary-color: #5b7d9c; /* くすみブルー（和のニュアンス） */
    --glass-bg: rgba(253, 252, 249, 0.85);
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.8;
    overflow-x: hidden;
}

h1, h2, h3, .font-serif {
    font-family: 'Noto Serif JP', serif;
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.nav-link {
    position: relative;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

.rounded-custom {
    border-radius: 4rem; /* より大きな角丸で柔らかさを強調 */
}

.glass-nav {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
}

.texture-bg {
    background-image: url('https://www.transparenttextures.com/patterns/natural-paper.png');
}

.menu-card {
    transition: transform 0.4s ease;
}

.menu-card:hover {
    transform: translateY(-10px);
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
    padding: 0.85rem 2.5rem;
    border-radius: 9999px;
    transition: all 0.3s;
    display: inline-block;
    letter-spacing: 0.1em;
}

.btn-primary:hover {
    opacity: 0.9;
    box-shadow: 0 10px 20px rgba(30, 58, 138, 0.15);
}

.vertical-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.2em;
}

.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-color);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: auto;
}

/* Background Floating Animations */
@keyframes float1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -50px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}
@keyframes float2 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-40px, 30px) rotate(-5deg); }
    66% { transform: translate(20px, -40px) rotate(5deg); }
}
@keyframes float3 {
    0%, 100% { transform: translate(0, 0) scale(1) rotate(0deg); }
    50% { transform: translate(20px, 20px) scale(1.05) rotate(3deg); }
}

.floating-1 { animation: float1 25s infinite ease-in-out; }
.floating-2 { animation: float2 30s infinite ease-in-out; }
.floating-3 { animation: float3 20s infinite ease-in-out; }