:root {
    --primary: #bc002d; /* Rouge du drapeau japonais */
    --secondary: #3b3b3b;
    --accent: #f4f4f4;
    --light-bg: #fff9f9;
    --dark-text: #333333;
}

body {
    font-family: 'Helvetica Neue', 'Hiragino Kaku Gothic Pro', sans-serif;
    line-height: 1.8;
    color: var(--dark-text);
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fefefe;
}

h1 {
    color: var(--primary);
    font-size: 2.4rem;
    text-align: center;
    border-bottom: 3px solid var(--primary);
    padding-bottom: 15px;
    margin: 30px 0;
}

h2 {
    color: var(--secondary);
    font-size: 1.8rem;
    margin-top: 45px;
    border-left: 4px solid var(--primary);
    padding-left: 15px;
}

h3 {
    color: var(--primary);
    font-size: 1.4rem;
    margin-top: 35px;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 25px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.cultural-insight {
    background-color: #f5f5f5;
    border-left: 4px solid var(--primary);
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
}

.app-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin: 40px 0;
}

.app-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
    border-top: 3px solid var(--primary);
}

.do-dont-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin: 35px 0;
}

.do-box {
    background-color: #f0f9f0;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #4CAF50;
}

.dont-box {
    background-color: #fff0f0;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #f44336;
}

.stat-block {
    background-color: var(--light-bg);
    padding: 25px;
    border-radius: 8px;
    margin: 40px 0;
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    color: var(--primary);
    font-weight: bold;
    margin: 15px 0;
}

.warning-note {
    background-color: #fff9e6;
    padding: 20px;
    border-radius: 8px;
    margin: 35px 0;
    border-left: 4px solid #FFC107;
}

.cta-block {
    background: linear-gradient(135deg, var(--primary), #8b0000);
    color: white;
    padding: 30px;
    border-radius: 10px;
    margin: 50px 0;
    text-align: center;
}

.expert-quote {
    font-style: italic;
    padding: 25px;
    border-left: 4px solid var(--primary);
    margin: 40px 0;
    background-color: #fafafa;
}

.conversation-tip {
    background-color: #f0f7ff;
    padding: 20px;
    border-radius: 8px;
    margin: 30px 0;
}

@media (max-width: 650px) {
    .do-dont-container {
        grid-template-columns: 1fr;
    }
}