@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=Noto+Serif+JP:wght@600;900&display=swap');

:root {
    --primary-color: #2c3e50;
    --accent-color: #c0392b; /* Traditional Red */
    --accent-hover: #a93226;
    --background-color: #fdfcf8; /* Washi paper off-white */
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --shadow-sm: 0 4px 6px rgba(0,0,0,0.05);
    --shadow-md: 0 8px 15px rgba(0,0,0,0.1);
    --font-heading: 'Noto Serif JP', serif;
    --font-body: 'Noto Sans JP', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--background-color);
    color: var(--text-main);
    line-height: 1.6;
    background-image: radial-gradient(#e5e5e5 1px, transparent 1px);
    background-size: 20px 20px;
}

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

/* Header & Nav */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-img {
    height: 50px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-links a {
    font-weight: 500;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 5px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

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

.nav-links a:hover {
    color: var(--accent-color);
}

/* Main Content */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.page-title {
    text-align: center;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.page-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* Section Styling */
.section {
    margin-bottom: 5rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.section-icon {
    width: 30px;
    height: auto;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--primary-color);
}

/* Grid Layout */
.technique-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
    height: 100%;
    border: 1px solid transparent;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: rgba(192, 57, 43, 0.2);
}

.card-img {
    max-width: 100%;
    height: 120px;
    object-fit: contain;
    margin-bottom: 1rem;
}

.card-title {
    font-weight: 700;
    color: var(--primary-color);
    margin-top: auto;
}

.card-subtext {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

/* Tournament & Footer Area */
.info-section {
    background: #fff;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-top: 4rem;
    text-align: center;
}

.tournament-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.tournament-btn {
    background: #f0f4f8;
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tournament-btn:hover {
    background: var(--accent-color);
    color: white;
    transform: scale(1.05);
}

.ads-container {
    margin: 2rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .technique-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .technique-grid {
        grid-template-columns: 1fr;
    }
}