/* ===================================
   Reset & Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Elegant Corporate */
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #c9a86a;
    --accent-light: #d4b787;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a4a;
    --text-light: #ffffff;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-heavy: rgba(0, 0, 0, 0.2);
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Noto Serif JP', serif;
    
    /* Spacing */
    --section-padding: 120px 0;
    --container-padding: 0 5%;
    
    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-smooth);
    box-shadow: 0 2px 20px var(--shadow-medium);
}

.header.scrolled {
    background-color: rgba(26, 26, 46, 0.98);
    box-shadow: 0 2px 30px var(--shadow-heavy);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-text {
    font-family: var(--font-secondary);
    font-size: 24px;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: 2px;
}

.logo-subtitle {
    font-size: 10px;
    color: var(--accent-color);
    letter-spacing: 3px;
    font-weight: 400;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 50px;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 1px;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: var(--transition-fast);
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.hamburger span {
    width: 30px;
    height: 2px;
    background-color: var(--text-light);
    transition: var(--transition-fast);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(201, 168, 106, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(201, 168, 106, 0.08) 0%, transparent 50%);
    animation: heroPattern 20s ease infinite;
}

@keyframes heroPattern {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 30px;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 30px;
}

.hero-title-main {
    font-family: var(--font-secondary);
    font-size: 56px;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: 4px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--accent-color);
    letter-spacing: 4px;
    margin-bottom: 40px;
    font-weight: 300;
}

.hero-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    line-height: 2;
    margin-bottom: 50px;
    font-weight: 300;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 18px 50px;
    background-color: var(--accent-color);
    color: var(--primary-color);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    border-radius: 50px;
    transition: var(--transition-smooth);
    box-shadow: 0 10px 30px rgba(201, 168, 106, 0.3);
}

.hero-btn:hover {
    background-color: var(--accent-light);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(201, 168, 106, 0.4);
}

.hero-btn i {
    font-size: 14px;
}

.scroll-indicator {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 11px;
    letter-spacing: 3px;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.6), transparent);
    animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% { opacity: 0.3; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(10px); }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 1.2s ease-out;
}

.fade-in-delay {
    animation: fadeIn 1.2s ease-out 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeIn 1.2s ease-out 0.6s both;
}

.fade-in-delay-3 {
    animation: fadeIn 1.2s ease-out 0.9s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Section Headers
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--font-secondary);
    font-size: 42px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.section-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--accent-color), var(--accent-light));
    margin: 0 auto 30px;
}

.section-description {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 2;
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--section-padding);
    background-color: var(--bg-white);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-text {
    margin-bottom: 60px;
    text-align: center;
}

.about-lead {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 2;
    margin-bottom: 30px;
}

.about-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 2;
}

.company-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.info-card {
    text-align: center;
    padding: 40px 30px;
    background-color: var(--bg-light);
    border-radius: 10px;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.info-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-light);
    border-color: var(--accent-color);
}

.info-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 28px;
}

.info-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-color);
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.info-text {
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.8;
    font-weight: 500;
}

/* ===================================
   Services Section
   =================================== */
.services {
    padding: var(--section-padding);
    background-color: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.service-card {
    background-color: var(--bg-white);
    padding: 50px 40px;
    border-radius: 15px;
    transition: var(--transition-smooth);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, var(--accent-color), var(--accent-light));
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 25px 50px var(--shadow-medium);
    border-color: var(--accent-color);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 32px;
    transition: var(--transition-smooth);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    color: var(--text-light);
}

.service-title {
    font-family: var(--font-secondary);
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.service-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 25px;
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.service-features i {
    color: var(--accent-color);
    font-size: 12px;
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    padding: var(--section-padding);
    background-color: var(--bg-white);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--bg-light);
    padding: 60px 50px;
    border-radius: 15px;
    box-shadow: 0 10px 40px var(--shadow-light);
}

.form-row {
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.required {
    color: #e74c3c;
    margin-left: 4px;
}

.form-input {
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-white);
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(201, 168, 106, 0.1);
}

.form-input::placeholder {
    color: #999;
}

.form-submit {
    margin-top: 40px;
    text-align: center;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 18px 60px;
    background-color: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 10px 30px var(--shadow-medium);
}

.submit-btn:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(201, 168, 106, 0.4);
}

.form-message {
    margin-top: 30px;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    display: block;
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-logo-text {
    font-family: var(--font-secondary);
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 3px;
}

.footer-logo-subtitle {
    font-size: 11px;
    color: var(--accent-color);
    letter-spacing: 4px;
}

.footer-info {
    text-align: center;
}

.footer-info p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 1px;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--primary-color);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 40px;
        transition: var(--transition-smooth);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }
    
    .hero-title-main {
        font-size: 36px;
        letter-spacing: 2px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .hero-description {
        font-size: 14px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .company-info-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-form {
        padding: 40px 30px;
    }
    
    .submit-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 20px;
    }
    
    .hero-title-main {
        font-size: 28px;
    }
    
    .hero-btn {
        padding: 15px 40px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
}