:root {
    --rice-white: #FCFCFC;
    --pearl-white: #FDFDFD;
    --ear-gold: #D4AF37;
    --ear-gold-light: #E9D28B;
    --ear-gold-soft: rgba(212, 175, 55, 0.08);
    --sumi-black: #1A1A1A;
    --sumi-gray: #4A4A4A;
    --soft-gray: #F5F5F5;
    --glass-white: rgba(255, 255, 255, 0.85);
    --washi-bg: url("https://www.transparenttextures.com/patterns/papur.png");
    
    /* Shadows */
    --shadow-sm: 0 4px 20px rgba(0,0,0,0.03);
    --shadow-md: 0 10px 40px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.1);
    
    /* Transitions */
    --transition-smooth: all 0.5s cubic-bezier(0.2, 1, 0.3, 1);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Shippori Mincho', serif;
    background-color: var(--rice-white);
    background-image: var(--washi-bg);
    color: var(--sumi-black);
    line-height: 2;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Base Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Navigation - Premium Glassmorphism */
nav {
    position: sticky;
    top: 0;
    background: var(--glass-white);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 1000;
    padding: 25px 0;
    border-bottom: 1px solid rgba(212, 175, 55, 0.15);
    transition: var(--transition-smooth);
}

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

.nav-logo {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--sumi-black);
    text-decoration: none;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 40px;
}

nav a {
    text-decoration: none;
    color: var(--sumi-gray);
    font-weight: 700;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
    position: relative;
    letter-spacing: 0.1em;
}

nav a:hover {
    color: var(--ear-gold);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--ear-gold);
    transition: var(--transition-smooth);
}

nav a:hover::after {
    width: 100%;
}

/* Header & Hero */
header {
    padding: 100px 0 60px;
    text-align: center;
    background: radial-gradient(circle at center, rgba(255,255,255,0.8) 0%, transparent 80%);
}

.site-title {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: 0.4em;
    color: var(--sumi-black);
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
    animation: fadeInScale 1.2s ease-out;
}

.site-concept {
    font-size: 1.2rem;
    color: var(--ear-gold);
    letter-spacing: 0.2em;
    font-weight: 400;
    animation: fadeInUp 1.2s ease-out;
}

.hero {
    padding-bottom: 150px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-img-container {
    position: relative;
    margin-bottom: 80px;
    animation: fadeInScale 1.5s ease-out;
}

.hero-img-container img {
    width: 100%;
    max-width: 800px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

.hero-img-container::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 40px;
    right: -40px;
    bottom: -40px;
    border: 1px solid var(--ear-gold);
    z-index: -1;
    opacity: 0.2;
}

.hero h2 {
    font-size: 2.8rem;
    margin-bottom: 40px;
    letter-spacing: 0.2em;
    animation: fadeInUp 1.2s ease-out;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    color: var(--sumi-gray);
    line-height: 2.2;
    margin-bottom: 50px;
    animation: fadeInUp 1.5s ease-out;
}

/* Section Common */
section {
    padding: 150px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 100px;
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 20px;
    letter-spacing: 0.2em;
    position: relative;
    display: inline-block;
}

.section-subtitle {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.6em;
    color: var(--ear-gold);
    font-weight: 300;
    text-transform: uppercase;
}

/* Card Design - Premium */
.card {
    background: white;
    border-radius: 20px;
    padding: 50px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    border: 1px solid rgba(0,0,0,0.03);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(212, 175, 55, 0.3);
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 50px;
}

/* Step Cards */
.step-card {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    line-height: 60px;
    background: var(--sumi-black);
    color: white;
    border-radius: 50%;
    margin: 0 auto 30px;
    font-weight: 700;
    font-size: 1.2rem;
    font-family: 'Noto Sans JP', sans-serif;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* Brand Cards */
.brand-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.brand-title {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--soft-gray);
    padding-bottom: 15px;
}

.brand-name {
    font-size: 1.8rem;
    font-weight: 700;
}

.brand-rating {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.8rem;
    color: var(--ear-gold);
}

.shop-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 30px;
}

.btn-shop {
    text-decoration: none;
    font-size: 0.8rem;
    padding: 12px;
    text-align: center;
    border-radius: 8px;
    border: 1px solid #eee;
    color: var(--sumi-gray);
    transition: var(--transition-smooth);
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 500;
}

.btn-shop:hover {
    background: var(--sumi-black);
    color: white;
    border-color: var(--sumi-black);
}

.btn-furusato {
    grid-column: span 2;
    background: var(--ear-gold-soft);
    color: var(--ear-gold-dark);
    border: 1px solid var(--ear-gold-light);
}

.btn-furusato:hover {
    background: var(--ear-gold);
}

/* Column Cards */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.article-card {
    overflow: hidden;
    padding: 0;
}

.article-image {
    width: 100%;
    height: 240px;
    background-color: var(--soft-gray);
    background-size: cover;
    background-position: center;
    transition: var(--transition-smooth);
}

.article-card:hover .article-image {
    transform: scale(1.05);
}

.article-content {
    padding: 40px;
}

.article-tag {
    font-size: 0.7rem;
    color: var(--ear-gold);
    letter-spacing: 0.1em;
    margin-bottom: 15px;
    display: block;
    font-family: 'Noto Sans JP', sans-serif;
}

.article-card h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.read-more {
    color: var(--sumi-black);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-smooth);
}

.read-more:hover {
    gap: 20px;
    color: var(--ear-gold);
}

/* Quiz Section */
.quiz-section {
    background: var(--ear-gold-soft);
    border-radius: 40px;
    padding: 100px 60px;
}

.quiz-container {
    background: white;
    padding: 60px;
    border-radius: 30px;
    box-shadow: var(--shadow-lg);
}

.quiz-btn {
    padding: 20px;
    border: 1px solid var(--soft-gray);
    border-radius: 12px;
    font-family: 'Shippori Mincho', serif;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    background: white;
    cursor: pointer;
    text-align: left;
}

.quiz-btn:hover {
    background: var(--sumi-black);
    color: white;
    border-color: var(--sumi-black);
    padding-left: 30px;
}

/* FAQ */
.faq-item {
    margin-bottom: 30px;
    border-left: 4px solid var(--ear-gold-light);
}

.faq-question {
    font-size: 1.3rem;
    padding: 20px 30px;
    cursor: pointer;
}

.faq-answer {
    padding: 0 30px 30px 60px;
    color: var(--sumi-gray);
}

/* Footer */
footer {
    background: var(--sumi-black);
    color: rgba(255,255,255,0.6);
    padding: 120px 0 60px;
}

.footer-logo {
    font-size: 2rem;
    color: white;
    letter-spacing: 0.3em;
    margin-bottom: 40px;
    display: block;
}

.footer-links {
    display: flex;
    gap: 30px;
    margin-top: 40px;
    font-size: 0.9rem;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
}

/* Back to Top */
#back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 60px;
    height: 60px;
    background: var(--sumi-black);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: var(--transition-smooth);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

#back-to-top:hover {
    transform: translateY(-10px);
    background: var(--ear-gold);
}

/* Share */
.share-bar {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 60px;
}

.share-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.share-btn:hover {
    transform: scale(1.1);
}

/* Article Detail Page */
.article-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 100px 40px;
}

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

.article-category {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--ear-gold);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    margin-bottom: 20px;
    display: block;
}

.article-title {
    font-size: 3rem;
    line-height: 1.4;
    margin-bottom: 40px;
    font-weight: 700;
}

.article-meta {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.8rem;
    color: #999;
}

.article-body {
    font-size: 1.15rem;
    line-height: 2.2;
    color: var(--sumi-gray);
}

.article-body h2 {
    font-size: 2rem;
    color: var(--sumi-black);
    margin: 80px 0 30px;
    position: relative;
    padding-left: 25px;
    border-left: 5px solid var(--ear-gold);
}

.article-body p {
    margin-bottom: 35px;
}

.article-body img {
    width: 100%;
    border-radius: 20px;
    margin: 60px 0;
    box-shadow: var(--shadow-md);
}

.article-body blockquote {
    background: var(--soft-gray);
    padding: 50px;
    border-radius: 20px;
    margin: 60px 0;
    position: relative;
}

.article-body blockquote::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 30px;
    font-size: 4rem;
    color: var(--ear-gold-light);
    font-family: serif;
    opacity: 0.3;
}

.sidebar-note {
    background: var(--ear-gold-soft);
    padding: 40px;
    border-radius: 15px;
    border-left: 5px solid var(--ear-gold);
    margin: 50px 0;
}

.sidebar-note strong {
    color: var(--ear-gold-dark);
    display: block;
    margin-bottom: 10px;
}

.article-footer {
    margin-top: 100px;
    padding-top: 60px;
    border-top: 1px solid #eee;
    text-align: center;
}

.btn-back {
    text-decoration: none;
    color: var(--sumi-black);
    font-weight: 700;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 15px;
    transition: var(--transition-smooth);
}

.btn-back:hover {
    gap: 25px;
    color: var(--ear-gold);
}

/* Responsive */
@media (max-width: 992px) {
    .site-title { font-size: 2.8rem; }
    .hero h2 { font-size: 2.2rem; }
    .article-title { font-size: 2.2rem; }
}

@media (max-width: 768px) {
    .container { padding: 0 25px; }
    nav ul { display: none; }
    .site-title { font-size: 2.2rem; letter-spacing: 0.2em; }
    section { padding: 100px 0; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .article-container { padding: 60px 25px; }
}