/* ========== MINIMALIST / ZEN THEME — 凛 -RIN- ========== */
:root {
    --bg: #ffffff;
    --surface: #fafafa;
    --dark: #111111;
    --text: #333333;
    --text-light: #777777;
    --border: #eeeeee;
    --border-dark: #dddddd;
    --font-heading: 'Noto Serif JP', serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --transition: all 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 2;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { 
    font-family: var(--font-heading); 
    color: var(--dark); 
    font-weight: 400; 
    letter-spacing: 0.05em; 
}

a { text-decoration:none; color:inherit; transition:var(--transition); }
img { max-width:100%; display:block; }
.container { max-width:1000px; margin:0 auto; padding:0 30px; }

/* Filter class for monochrome images with high contrast */
.zen-img { filter: grayscale(100%) contrast(1.1) brightness(0.95); transition:var(--transition); }
.zen-img:hover { filter: grayscale(100%) contrast(1) brightness(1); }

/* Navigation */
.top-nav {
    position:fixed; top:0; left:0; width:100%; z-index:1000;
    background:rgba(255,255,255,0.95); backdrop-filter:blur(5px);
    border-bottom:1px solid var(--border); padding:20px 0;
}
.top-nav .container { display:flex; justify-content:space-between; align-items:center; }
.brand { 
    font-family:var(--font-heading); 
    font-size:24px; 
    color:var(--dark); 
    letter-spacing:0.1em;
    display:flex;
    align-items:center;
    gap:16px;
}
.brand::after {
    content: "FUKUOKA";
    font-family: var(--font-body);
    font-size: 9px;
    letter-spacing: 0.3em;
    color: var(--text-light);
    border-left: 1px solid var(--border-dark);
    padding-left: 16px;
}
.nav-menu { display:flex; gap:40px; list-style:none; }
.nav-menu a { 
    font-size:13px; 
    color:var(--text-light); 
    letter-spacing:0.1em; 
    position:relative;
    padding-bottom:4px;
}
.nav-menu a::after {
    content:''; position:absolute; bottom:0; left:0; width:0; height:1px; background:var(--dark); transition:var(--transition);
}
.nav-menu a:hover::after { width:100%; }
.nav-menu a:hover { color:var(--dark); }

/* Hero */
.hero {
    margin-top:71px; min-height:85vh;
    display:flex; align-items:center; justify-content:center;
    text-align:center; padding:100px 0;
}
.hero h1 { 
    font-size:3.2rem; 
    line-height:1.4; 
    margin-bottom:30px; 
    color:var(--dark);
}
.hero p { 
    color:var(--text-light); 
    font-size:1.1rem; 
    margin-bottom:50px; 
    max-width:600px;
    margin-left:auto; margin-right:auto;
}

/* Buttons */
.btn-solid {
    display:inline-flex; align-items:center; justify-content:center; 
    padding:16px 48px; background:var(--dark); color:#fff;
    font-size:13px; letter-spacing:0.15em; transition:var(--transition);
    border:1px solid var(--dark);
}
.btn-solid:hover { background:var(--bg); color:var(--dark); }
.btn-outline {
    display:inline-flex; align-items:center; justify-content:center; 
    padding:16px 48px; border:1px solid var(--border-dark); color:var(--dark);
    font-size:13px; letter-spacing:0.15em; transition:var(--transition);
}
.btn-outline:hover { border-color:var(--dark); }

/* Sections */
.section { padding:140px 0; }
.section-alt { background:var(--surface); }
.section-title { 
    font-size:2rem; 
    margin-bottom:20px; 
    text-align:center; 
}
.section-sub { 
    text-align:center; 
    color:var(--text-light); 
    margin-bottom:80px; 
    font-size:15px;
}

/* Grid */
.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:80px; align-items:center; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:40px; }

/* Minimal Cards */
.zen-card { text-align:center; padding:40px 20px; }
.zen-number { 
    font-family:var(--font-heading); 
    font-size:2rem; 
    color:var(--border-dark); 
    margin-bottom:20px; 
    line-height:1;
}
.zen-card h3 { font-size:1.3rem; margin-bottom:16px; }
.zen-card p { font-size:14px; color:var(--text-light); }

/* Service List */
.svc-item { 
    display:grid; grid-template-columns:40% 60%; gap:60px; 
    margin-bottom:80px; align-items:center; 
}
.svc-item:nth-child(even) { grid-template-columns:60% 40%; }
.svc-img-wrap { overflow:hidden; }
.svc-img-wrap img { width:100%; height:auto; }
.svc-item:nth-child(even) .svc-content { grid-column:1; grid-row:1; }
.svc-item:nth-child(even) .svc-img-wrap { grid-column:2; grid-row:1; }
.svc-header { display:flex; justify-content:space-between; align-items:baseline; margin-bottom:20px; padding-bottom:16px; border-bottom:1px solid var(--border); }
.svc-header h3 { font-size:1.5rem; }
.svc-price { font-size:1.2rem; color:var(--text-light); letter-spacing:0.05em; }

/* Forms */
.form-minimal { max-width:700px; margin:0 auto; }
.form-group { margin-bottom:30px; }
.form-group label { display:block; margin-bottom:10px; font-size:13px; color:var(--text-light); letter-spacing:0.05em; }
.form-group input, .form-group textarea, .form-group select {
    width:100%; padding:16px; border:none; border-bottom:1px solid var(--border-dark);
    font-family:var(--font-body); font-size:16px; background:transparent; color:var(--text); transition:var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline:none; border-bottom-color:var(--dark);
}

/* Map */
.map-wrap { height:300px; filter:grayscale(100%); transition:var(--transition); }
.map-wrap:hover { filter:grayscale(0%); }

/* Footer */
.footer { padding:80px 0; border-top:1px solid var(--border); text-align:center; }
.footer-links { list-style:none; display:flex; justify-content:center; gap:30px; margin-bottom:40px; }
.footer-links a { font-size:12px; color:var(--text-light); letter-spacing:0.1em; }
.footer-links a:hover { color:var(--dark); }
.footer-brand { font-family:var(--font-heading); font-size:1.5rem; letter-spacing:0.1em; margin-bottom:10px; }
.footer-copy { font-size:11px; color:var(--text-light); letter-spacing:0.1em; }

/* Animations */
.reveal { opacity:0; transform:translateY(40px); transition:opacity 1s ease, transform 1s ease; }
.reveal.active { opacity:1; transform:translateY(0); }
.del-1 { transition-delay:0.1s; } .del-2 { transition-delay:0.2s; }

/* Responsive */
@media(max-width:768px) {
    .nav-menu { display:none; }
    .hero h1 { font-size:2.2rem; }
    .grid-2, .grid-3 { grid-template-columns:1fr; gap:40px; }
    .svc-item, .svc-item:nth-child(even) { grid-template-columns:1fr; gap:30px; }
    .svc-item:nth-child(even) .svc-content { grid-row:2; }
    .svc-item:nth-child(even) .svc-img-wrap { grid-row:1; }
    .footer-links { flex-direction:column; gap:15px; }
}