:root {
    --primary-color: #1a237e; /* Deep Indigo */
    --secondary-color: #3949ab; 
    --accent-color: #ffca28; /* Amber */
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #f5f7fa;
    --white: #ffffff;
    --dark-bg: #1a1a1a;
    --font-main: 'Noto Sans JP', sans-serif;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --border-radius: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden; /* Prevent horizontal scroll from animations */
}

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Header */
.header {
    background: var(--white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav ul {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav a {
    font-weight: 500;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: 0.3s;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
}

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

.btn-accent:hover {
    background: #ffd54f;
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Hero Section */
.hero {
    margin-top: 70px; /* Header height */
    padding: 150px 0;
    position: relative;
    background-image: url('https://images.unsplash.com/photo-1497215728101-856f4ea42174?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 35, 126, 0.85); /* Primary color with opacity */
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.hero-text {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

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

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.section-desc {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-light);
}

.bg-light {
    background: var(--bg-light);
}

.bg-dark {
    background: var(--dark-bg);
}

.text-white {
    color: var(--white);
}

/* About Section Improvements */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.about-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

/* Services */
.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-item {
    background: var(--white);
    border: 1px solid #e0e0e0;
    border-radius: var(--border-radius);
    overflow: hidden; /* For image */
    transition: 0.3s;
}

.service-item:hover {
    box-shadow: var(--shadow);
}

.service-img {
    height: 200px;
    width: 100%;
    background-color: #eee;
    background-size: cover;
    background-position: center;
}

.service-content {
    padding: var(--spacing-md);
}

.service-item h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
    border-bottom: 2px solid var(--accent-color);
    display: inline-block;
    padding-bottom: 5px;
}

/* Contact */
.contact-container {
    max-width: 600px;
}

.contact-form {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Footer */
.footer {
    background: #000;
    color: #fff;
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer-logo {
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Animations */
.fade-in {
    opacity: 0;
    transition: opacity 1s ease-out;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.visible {
    opacity: 1;
    transform: translateY(0) translateX(0);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .nav {
        display: none; /* Mobile menu implementation omitted for brevity, can add if requested */
    }
    
    .contact-form {
        padding: var(--spacing-md);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }

    .fade-in-left, .fade-in-right {
        transform: translateY(30px); /* Reset to vertical on mobile for simpler animation */
    }
    .visible {
        transform: translateY(0);
    }
}