/* ========================================
   CSS Variables and Reset
   ======================================== */
:root {
    --primary-color: #17184b;
    --secondary-color: #2a2d7c;
    --accent-color: #4a4fb5;
    --light-accent: #6b70d8;
    --text-light: #ffffff;
    --text-dark: #333333;
    --text-gray: #666666;
    --bg-light: #f8f9fa;
    --bg-dark: #0a0b1f;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 2px 8px rgba(23, 24, 75, 0.1);
    --shadow-md: 0 4px 16px rgba(23, 24, 75, 0.15);
    --shadow-lg: 0 8px 32px rgba(23, 24, 75, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--text-dark);
    line-height: 1.8;
    background-color: #ffffff;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif JP', serif;
    font-weight: 700;
    line-height: 1.4;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   Navigation
   ======================================== */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(23, 24, 75, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo a {
    font-family: 'Noto Serif JP', serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    color: var(--text-light);
    font-weight: 400;
    font-size: 16px;
    padding: 8px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--light-accent);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--text-light);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a0b1f 0%, var(--primary-color) 50%, #1a1d5a 100%);
    overflow: hidden;
}

#particleCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--text-light);
    padding: 0 20px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 4px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease-out;
}

.hero-company {
    font-family: 'Noto Serif JP', serif;
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 30px;
    letter-spacing: 8px;
    opacity: 0.95;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 18px;
    font-weight: 300;
    margin-bottom: 40px;
    letter-spacing: 2px;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
    font-size: 12px;
    letter-spacing: 2px;
    z-index: 2;
    animation: fadeIn 1s ease-out 1s both;
}

.scroll-line {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--light-accent));
    animation: scrollLine 2s ease-in-out infinite;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: 14px 40px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--light-accent);
    color: var(--text-light);
    box-shadow: 0 4px 20px rgba(106, 112, 216, 0.4);
}

.btn-primary:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(106, 112, 216, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border-color: var(--text-light);
}

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

.btn-large {
    padding: 18px 50px;
    font-size: 18px;
}

/* ========================================
   Section Styles
   ======================================== */
section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 42px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--accent-color), var(--light-accent));
    margin: 0 auto;
    border-radius: 2px;
}

/* ========================================
   Introduction Section
   ======================================== */
.intro-section {
    background: var(--bg-light);
}

.intro-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.intro-text {
    font-size: 18px;
    line-height: 2;
    color: var(--text-gray);
}

/* ========================================
   Services Preview
   ======================================== */
.services-preview {
    background: #ffffff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.service-card {
    background: #ffffff;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
    border: 1px solid #e8e9f3;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--light-accent);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--accent-color), var(--light-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--text-light);
}

.service-card h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.service-card p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.8;
}

.cta-center {
    text-align: center;
}

/* ========================================
   Achievements Section
   ======================================== */
.achievements-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
}

.achievements-section .section-title {
    color: var(--text-light);
}

.achievements-section .section-divider {
    background: linear-gradient(to right, var(--light-accent), rgba(255, 255, 255, 0.5));
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.achievement-card {
    text-align: center;
    padding: 40px 20px;
}

.achievement-number {
    font-size: 64px;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #ffffff, var(--light-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.achievement-label {
    font-size: 18px;
    opacity: 0.9;
    letter-spacing: 1px;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    background: var(--bg-light);
    text-align: center;
}

.cta-title {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.cta-text {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 40px;
}

/* ========================================
   Footer
   ======================================== */
.main-footer {
    background: var(--primary-color);
    color: var(--text-light);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-section p {
    font-size: 15px;
    opacity: 0.9;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: var(--text-light);
    opacity: 0.8;
    font-size: 15px;
}

.footer-section ul li a:hover {
    opacity: 1;
    padding-left: 5px;
}

.footer-section i {
    margin-right: 10px;
    color: var(--light-accent);
}

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

.footer-bottom p {
    font-size: 14px;
    opacity: 0.7;
}

/* ========================================
   Page Specific Styles
   ======================================== */
.page-header {
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    text-align: center;
}

.page-title {
    font-size: 48px;
    margin-bottom: 20px;
}

.page-subtitle {
    font-size: 18px;
    opacity: 0.9;
}

.content-section {
    padding: 80px 0;
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes scrollLine {
    0%, 100% {
        transform: scaleY(1);
        opacity: 0.3;
    }
    50% {
        transform: scaleY(1.5);
        opacity: 1;
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 968px) {
    .nav-container {
        padding: 0 20px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(23, 24, 75, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 30px;
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu a {
        font-size: 24px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-company {
        font-size: 24px;
        letter-spacing: 4px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 32px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 36px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 28px;
        letter-spacing: 2px;
    }

    .hero-company {
        font-size: 20px;
        letter-spacing: 3px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}