:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --primary-color: #2563eb;
    /* Vivid Blue */
    --secondary-color: #7c3aed;
    /* Vivid Purple */
    --accent-color: #10b981;
    --surface-color: #ffffff;
    --surface-border: #e5e5e5;
    --font-main: 'Inter', 'Noto Sans JP', sans-serif;
    --container-width: 1200px;
    --header-height: 80px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--surface-border);
    color: var(--text-color);
    margin-left: 16px;
}

.btn-secondary:hover {
    background: var(--surface-color);
    border-color: var(--text-color);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--surface-border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.nav ul {
    display: flex;
    gap: 32px;
}

.nav a {
    font-size: 0.95rem;
    font-weight: 500;
    opacity: 0.8;
}

.nav a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    padding-top: var(--header-height);
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 24px;
    font-weight: 700;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-bg {
    position: absolute;
    top: -20%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: 1;
    filter: blur(60px);
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 60px;
    text-align: center;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 24px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.visual-img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.service-card {
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    padding: 40px;
    border-radius: 20px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.icon-box {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 24px;
    opacity: 0.5;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.service-card p {
    color: var(--text-muted);
}

.contact {
    text-align: center;
    background: linear-gradient(180deg, #ffffff, #eff6ff);
}

.contact-desc {
    margin-bottom: 40px;
    color: var(--text-muted);
}

/* Footer */
.footer {
    padding: 60px 0;
    border-top: 1px solid var(--surface-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.footer-links {
    display: flex;
    gap: 24px;
}

/* Mobile */
@media (max-width: 768px) {
    .header-inner {
        padding: 0 20px;
    }

    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        gap: 6px;
    }

    .mobile-menu-btn span {
        width: 24px;
        height: 2px;
        background-color: var(--text-color);
    }

    .nav {
        display: none;
        /* Simplification for draft */
    }

    .logo {
        font-size: 1.1rem;
        white-space: nowrap;
    }

    .hero-title {
        font-size: 3rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 24px;
    }

    .hero-actions {
        display: flex;
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }

    .hero-actions .btn-secondary {
        margin-left: 0;
    }
}