/* Reset & Base Styles */
:root {
    --primary-color: #0056b3; /* 信頼感のある濃い青 */
    --secondary-color: #f0f2f5;
    --text-color: #333;
    --accent-color: #00a8ff;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
}

/* Header */
.header {
    background: #fff;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-weight: 700;
    font-size: 24px;
    color: var(--primary-color);
}

.header nav a {
    margin-left: 20px;
    color: var(--text-color);
    font-weight: bold;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: bold;
    transition: opacity 0.3s;
}

.btn:hover {
    opacity: 0.8;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
}

.btn-secondary {
    background: #fff;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline {
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 16px;
}

.btn-large {
    background: #fff;
    color: var(--primary-color);
    padding: 15px 40px;
    font-size: 18px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #e6efff 100%);
    padding: 80px 0;
    text-align: center;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: 40px;
    color: #666;
}

.hero-buttons .btn {
    margin: 0 10px;
}

/* Features Section */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: center;
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* CTA Section */
.cta {
    background: var(--primary-color);
    color: #fff;
    text-align: center;
}

.cta-title {
    font-size: 32px;
    margin-bottom: 20px;
}

.cta-text {
    margin-bottom: 30px;
    font-size: 18px;
}

/* Footer */
.footer {
    background: #333;
    color: #fff;
    padding: 20px 0;
    text-align: center;
    font-size: 14px;
}