/* =========================================
   Reset & Variables
========================================= */
:root {
    --color-text: #374151;
    --color-heading: #111827;
    --color-bg: #f8fafc; /* Very light slate for premium contrast */
    --color-white: #ffffff;
    --color-primary: #1e3a8a; /* Deep premium blue */
    --color-primary-hover: #1e40af;
    --color-border: #e2e8f0;
    
    --badge-b2c: #10b981; /* Emerald */
    --badge-b2b: #f59e0b; /* Amber */
    
    /* Card Visual Colors */
    --color-salon: #fdf2f8; /* Pink light */
    --color-salon-text: #db2777;
    --color-cafe: #fef3c7; /* Amber light */
    --color-cafe-text: #b45309;
    --color-free: #eff6ff; /* Blue light */
    --color-free-text: #2563eb;
    --color-corp: #f1f5f9; /* Slate light */
    --color-corp-text: #475569;

    --font-en: 'Inter', sans-serif;
    --font-ja: 'Noto Sans JP', sans-serif;
    --font-mincho: 'Shippori Mincho', serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ja);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    letter-spacing: 0.04em;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* =========================================
   Animations & Utilities
========================================= */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.delay-1 { transition-delay: 0.2s; }
.fade-in.is-visible { opacity: 1; transform: translateY(0); }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
}

.pc-only { display: block; }
.sp-only { display: none; }

@media screen and (max-width: 768px) {
    .pc-only { display: none; }
    .sp-only { display: block; }
}

/* =========================================
   Buttons
========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 14px rgba(30, 58, 138, 0.25);
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(30, 58, 138, 0.3);
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
    gap: 12px;
}

.btn-xl {
    padding: 20px 48px;
    font-size: 1.2rem;
    gap: 12px;
}

/* =========================================
   Header
========================================= */
.header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    padding: 15px 0;
}

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

.logo {
    font-family: var(--font-en);
    font-size: 1.3rem;
    color: var(--color-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.btn-header {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 8px 20px;
    border-radius: 50px;
    background: var(--color-white);
}

.btn-header:hover {
    background: var(--color-bg);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* =========================================
   Hero Section
========================================= */
.hero {
    position: relative;
    padding: 180px 0 100px;
    background-color: var(--color-white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(30,58,138,0.04) 0%, rgba(255,255,255,0) 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero-container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-label {
    display: inline-block;
    font-family: var(--font-en);
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
    padding: 6px 16px;
    border-radius: 50px;
    background: rgba(30, 58, 138, 0.05);
}

.hero-title {
    font-size: 2.8rem;
    color: var(--color-heading);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 30px;
    letter-spacing: -0.02em;
}

.hero-desc {
    font-size: 1.15rem;
    color: #4b5563;
    margin-bottom: 50px;
}

/* =========================================
   Portfolio (Samples) Section
========================================= */
.portfolio {
    background-color: var(--color-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-en {
    font-family: var(--font-en);
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    display: block;
    margin-bottom: 10px;
}

.section-title {
    font-size: 2.2rem;
    color: var(--color-heading);
    font-weight: 700;
    margin-bottom: 15px;
}

.section-subtitle {
    color: #64748b;
}

/* Grid & Cards */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.port-card {
    background: var(--color-white);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.port-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.06);
    border-color: #cbd5e1;
}

/* Card Visuals (Theme specific) */
.card-visual {
    height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-bottom: 1px solid var(--color-border);
}

.visual-salon { background-color: var(--color-salon); color: var(--color-salon-text); }
.visual-cafe { background-color: var(--color-cafe); color: var(--color-cafe-text); font-family: var(--font-mincho); }
.visual-free { background-color: var(--color-free); color: var(--color-free-text); }
.visual-corp { background-color: var(--color-corp); color: var(--color-corp-text); }

.visual-icon {
    font-size: 3rem;
    line-height: 1;
}

.visual-theme {
    font-family: var(--font-en);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

/* Card Content */
.card-content {
    padding: 40px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.tag {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: 50px;
}
.tag-b2c { background-color: var(--badge-b2c); }
.tag-b2b { background-color: var(--badge-b2b); }

.tag-outline {
    font-size: 0.75rem;
    font-weight: 600;
    color: #64748b;
    border: 1px solid #cbd5e1;
    padding: 3px 12px;
    border-radius: 50px;
}

.card-title {
    font-size: 1.4rem;
    color: var(--color-heading);
    font-weight: 700;
    margin-bottom: 15px;
}

.card-desc {
    color: #4b5563;
    font-size: 0.95rem;
    margin-bottom: 30px;
    flex: 1;
}

/* Card Button */
.card-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    color: var(--color-primary);
    font-weight: 600;
    transition: color 0.3s ease;
}

.port-card:hover .card-btn {
    color: var(--color-primary-hover);
}

.card-btn .arrow {
    transition: transform 0.3s ease;
}

.port-card:hover .card-btn .arrow {
    transform: translateX(5px);
}

/* =========================================
   Contact & Disclaimer
========================================= */
.contact {
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
}

.contact-container {
    max-width: 800px;
}

.contact-box {
    text-align: center;
    padding: 60px 40px;
    background: #f8fafc;
    border-radius: 20px;
    border: 1px solid var(--color-border);
    margin-bottom: 40px;
}

.contact-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 20px;
}

.contact-title {
    font-size: 2rem;
    color: var(--color-heading);
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-desc {
    color: #4b5563;
    margin-bottom: 40px;
}

.disclaimer {
    text-align: center;
    font-size: 0.9rem;
    color: #94a3b8;
    padding: 20px;
    background: var(--color-bg);
    border-radius: 8px;
}

/* =========================================
   Footer
========================================= */
.footer {
    text-align: center;
    padding: 40px 0;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
    font-family: var(--font-en);
    font-size: 0.85rem;
    color: #9ca3af;
}

/* =========================================
   Responsive
========================================= */
@media screen and (max-width: 992px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }
}

@media screen and (max-width: 768px) {
    .hero {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 2rem;
    }

    .section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .card-content {
        padding: 30px 20px;
    }

    .contact-box {
        padding: 40px 20px;
    }

    .contact-title {
        font-size: 1.5rem;
    }
}