/* ===== 基本設定 ===== */
:root {
    /* カラー */
    --color-bg-primary: #0f0f13; /* dpko page base */
    --color-bg-secondary: #1a1a24;
    --color-bg-tertiary: #23232f;
    --color-accent-primary: #8a56ff; /* dpko purple */
    --color-accent-secondary: #c56cf0; /* dpko pinkish purple */
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #b3b3cc;
    --color-warning: #ff5e5e;
    --color-success: #56ff8a;
    
    /* フォント */
    --font-primary: 'Poppins', 'Inter', sans-serif;
    --font-secondary: 'Inter', 'Roboto', sans-serif;
    
    /* アニメーション */
    --transition-fast: 0.2s;
    --transition-medium: 0.3s;
    --transition-slow: 0.5s;
    
    /* サイズ */
    --container-width: 1200px;
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.03); /* Darker glass for dpko */
    --glass-border: 1px solid rgba(138, 86, 255, 0.2); /* Purple border for glass */
    --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    --glass-blur: 8px; /* Slightly less blur */
}

/* ===== リセットとベース ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

a {
    text-decoration: none;
    color: var(--color-text-primary);
    transition: color var(--transition-fast) ease;
}

a:hover {
    color: var(--color-accent-primary);
}

ul {
    list-style: none;
}

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

/* ===== 背景効果 ===== */
.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/png;base64,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');
    opacity: 0.05;
    z-index: -2;
    pointer-events: none;
}

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(138, 86, 255, 0.1) 0%, rgba(15, 15, 19, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* ===== ヘッダーとナビゲーション ===== */
header { /* Applying Glass Nav */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 15, 19, 0.6); /* Darker base for dpko nav */
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid rgba(var(--color-accent-primary-rgb), 0.2); /* dpko purple border */
    transition: all var(--transition-medium) ease;
}

header.scrolled {
    background: rgba(15, 15, 19, 0.85); /* Darker on scroll */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: var(--container-width);
    margin: 0 auto;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-accent-primary);
    text-shadow: 0 0 10px rgba(138, 86, 255, 0.5);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    position: relative;
    font-weight: 500;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent-secondary); /* Lighter purple for hover */
    transition: width var(--transition-medium) ease;
}

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

.cta-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.2rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: all var(--transition-fast) ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: #7642ff;
    color: white;
    box-shadow: 0 0 15px rgba(138, 86, 255, 0.5);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    border: 1px solid rgba(138, 86, 255, 0.2);
}

.btn-secondary:hover {
    background-color: rgba(138, 86, 255, 0.1);
    color: var(--color-text-primary);
    box-shadow: 0 0 15px rgba(138, 86, 255, 0.1);
    transform: translateY(-2px);
}

.btn-large {
    padding: 0.8rem 1.8rem;
    font-size: 1.1rem;
}

.btn i {
    margin-right: 0.5rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
}

.hamburger span {
    display: block;
    height: 2px;
    width: 100%;
    background-color: var(--color-text-primary);
    border-radius: 3px;
    transition: all var(--transition-fast) ease;
}

/* ===== ヒーローセクション ===== */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(26, 26, 36, 0.8) 0%, rgba(15, 15, 19, 0.8) 100%);
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(138, 86, 255, 0.1) 0%, rgba(15, 15, 19, 0) 70%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
    animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-logo {
    position: relative;
    margin-bottom: 2rem;
}

.hero-logo h1 {
    font-size: 5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-shadow: 0 0 20px rgba(138, 86, 255, 0.5);
    position: relative;
    z-index: 1;
}

.logo-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(138, 86, 255, 0.3) 0%, rgba(15, 15, 19, 0) 70%);
    border-radius: 50%;
    z-index: 0;
    animation: pulse 3s infinite ease-in-out;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
}

.hero-description {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-20px) translateX(-50%); }
    60% { transform: translateY(-10px) translateX(-50%); }
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--color-text-secondary);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 6px;
    height: 6px;
    background-color: var(--color-text-secondary);
    border-radius: 50%;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: wheel 1.5s infinite;
}

@keyframes wheel {
    0% { top: 10px; opacity: 1; }
    100% { top: 30px; opacity: 0; }
}

.arrow {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.arrow span {
    display: block;
    width: 10px;
    height: 10px;
    border-bottom: 2px solid var(--color-text-secondary);
    border-right: 2px solid var(--color-text-secondary);
    transform: rotate(45deg);
}

/* ===== セクション共通 ===== */
section {
    padding: 6rem 0;
    position: relative;
}

section:nth-child(odd) {
    background-color: var(--color-bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    position: relative;
    display: block;
    opacity: 0;
    transform: translateY(20px);
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    visibility: visible !important;
    will-change: transform, opacity;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--color-accent-primary);
    border-radius: 3px;
}

.section-title.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

.section-description {
    text-align: center;
    color: var(--color-text-secondary);
    max-width: 800px;
    margin: 0 auto 3rem auto;
    font-size: 1.1rem;
}

/* ===== 技術力セクション ===== */
.tech-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--glass-shadow);
    border: var(--glass-border);
    transition: all 0.3s ease;
    text-align: center; /* Ensure content is centered */
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(var(--color-accent-primary-rgb), 0.3);
    border-color: rgba(var(--color-accent-primary-rgb), 0.4);
}

.feature-card .card-icon i {
    font-size: 2.8rem; /* Slightly larger icon */
    color: var(--color-accent-primary);
    margin-bottom: 1rem;
    text-shadow: 0 0 10px var(--color-accent-primary), 
                 0 0 20px var(--color-accent-primary), 
                 0 0 30px var(--color-accent-secondary); /* Neon effect */
    animation: neon-pulse 1.5s infinite alternate; /* Neon pulse animation */
}

@keyframes neon-pulse {
    from {
        text-shadow: 0 0 5px var(--color-accent-primary), 
                     0 0 10px var(--color-accent-primary), 
                     0 0 15px var(--color-accent-secondary);
    }
    to {
        text-shadow: 0 0 10px var(--color-accent-primary), 
                     0 0 20px var(--color-accent-primary), 
                     0 0 30px var(--color-accent-secondary), 
                     0 0 40px var(--color-accent-secondary);
    }
}

.feature-card h3 {
    color: var(--color-text-primary);
    font-size: 1.4rem; /* Adjusted size */
    margin-bottom: 0.8rem;
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.check-mark {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    color: var(--color-success);
    text-shadow: 0 0 10px rgba(86, 255, 138, 0.5);
}

/* ===== コミュニティセクション ===== */
.community-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.community-card-container { /* Wrapper for 3D effect */
    perspective: 1000px;
}

.community-card { /* This is the .card-3d content */
    position: relative;
    width: 100%;
    min-height: 220px; /* Adjusted height */
    transform-style: preserve-3d;
    transition: all 0.5s ease;
    border-radius: var(--border-radius-lg);
    background: linear-gradient(135deg, #20202a, #181820); /* Darker gradient for dpko */
    padding: 1.8rem; /* Adjusted padding */
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    color: var(--color-text-primary);
    text-align: center;
}

.community-card-container:hover .community-card {
    transform: rotateY(10deg) rotateX(10deg) translateZ(20px); /* Added translateZ for more depth */
    box-shadow: 0 20px 45px rgba(var(--color-accent-primary-rgb), 0.25); 
}

.community-card .card-icon i {
    font-size: 2.5rem;
    color: var(--color-accent-secondary); /* Lighter purple for community icons */
    margin-bottom: 1rem;
}

.community-card h3 {
    color: var(--color-text-primary);
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.community-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ===== セキュリティセクション ===== */
.security-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    margin: 3rem 0;
    text-align: center;
}

.security-image {
    width: 100%;
    max-width: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.shield-icon {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(138, 86, 255, 0.1) 0%, rgba(197, 108, 240, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--color-accent-primary);
    text-shadow: 0 0 20px rgba(138, 86, 255, 0.5);
    position: relative;
    overflow: hidden;
}

.shield-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(transparent, rgba(138, 86, 255, 0.3), transparent 30%);
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

.security-text {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
}

.security-features {
    list-style: none;
    padding: 0;
}

.security-features li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    font-size: 1.1rem;
}

.security-features li i {
    color: var(--color-accent-primary);
    margin-right: 1rem;
    font-size: 1.2rem;
}

.security-motto {
    text-align: center;
    margin-top: 3rem;
    font-size: 1.3rem;
    font-style: italic;
    color: var(--color-text-secondary);
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
}

/* ===== CTAセクション ===== */
#cta {
    text-align: center;
    padding: 6rem 0;
    background: linear-gradient(135deg, rgba(26, 26, 36, 0.9) 0%, rgba(15, 15, 19, 0.9) 100%);
    position: relative;
    overflow: hidden;
}

#cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(138, 86, 255, 0.1) 0%, rgba(15, 15, 19, 0) 70%);
    z-index: -1;
}

#cta h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

#cta p {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.1rem;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

/* ===== フッター ===== */
footer {
    background-color: var(--color-bg-primary);
    border-top: 1px solid rgba(138, 86, 255, 0.1);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-accent-primary);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(138, 86, 255, 0.1);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast) ease;
    font-size: 1.2rem;
}

.social-icon:hover {
    background-color: var(--color-accent-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(138, 86, 255, 0.3);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(138, 86, 255, 0.05);
}

.footer-bottom p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ===== レスポンシブデザイン ===== */
@media (max-width: 1024px) {
    .hero-logo h1 {
        font-size: 4rem;
    }
    
    .hero-description {
        font-size: 1.3rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .nav-links, .cta-buttons {
        display: none;
    }
    
    .hamburger {
        display: flex;
        width: 25px;
        height: 18px;
    }
    
    .hamburger span {
        height: 2px;
    }
    
    .hero-logo h1 {
        font-size: 3.5rem;
    }
    
    .hero-description {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .security-content {
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .mobile-menu .nav-links {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .mobile-menu .nav-links a {
        display: block;
        color: white;
        font-size: 1.3rem;
        padding: 0.5rem 0;
    }
    
    .mobile-menu .cta-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        margin-top: 2rem;
    }
    
    .mobile-menu .cta-buttons .btn {
        display: block;
        width: 80%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-logo h1 {
        font-size: 3rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .feature-card, .community-card {
        padding: 1.5rem;
    }
}

/* ===== モバイルメニュー ===== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 300px;
    height: 100%;
    background-color: var(--color-bg-secondary);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    transition: left var(--transition-medium) ease;
    padding: 2rem;
    z-index: 1001;
    overflow-y: auto;
}

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

.mobile-menu-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.mobile-menu-links a {
    color: white;
    font-size: 1.2rem;
    text-decoration: none;
}

.mobile-cta-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.close-menu {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem;
    color: white;
    cursor: pointer;
}

body.menu-open {
    overflow: hidden;
}

/* ===== アニメーション ===== */
[class*="fade-in"],
[class*="slide-in"],
[class*="scale-in"] {
    opacity: 1;
    visibility: visible !important;
    will-change: transform, opacity;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform-style: preserve-3d;
    perspective: 1000px;
    pointer-events: auto !important;
}

/* フェードインアニメーション */
.fade-in {
    transform: none;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* 左からスライドイン */
.slide-in-left {
    transform: none;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-left.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* 右からスライドイン */
.slide-in-right {
    transform: none;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-in-right.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* スケールインアニメーション */
.scale-in {
    transform: none;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scale-in.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* 技術力セクション専用スタイル */
.tech-features .feature-card {
    opacity: 1;
    transform: none;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s ease;
    visibility: visible !important;
    will-change: transform, opacity;
}

.tech-features .feature-card.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* アニメーション完了後のスタイル */
.animation-completed {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

/* セクションタイトル */
.section-title {
    opacity: 1 !important;
    transform: none !important;
    visibility: visible !important;
}

.section-title.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* コミュニティカード */
.community-card {
    opacity: 1 !important;
    transform: none !important;
    visibility: visible !important;
}

.community-card.visible {
    opacity: 1 !important;
    transform: none !important;
}

/* Ensure particles.js div is styled if used on this page */
#particles-js-dpko {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
}