/* ==========================================
   モノリンク合同会社 - ダークテーマスタイルシート
   次世代テクノロジー & サイバーパンクデザイン
   ========================================== */

/* リセット & ベース設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* ダークテーマカラーパレット */
    --primary-purple: #8b5cf6;
    --primary-purple-dark: #7c3aed;
    --primary-purple-light: #a78bfa;
    --accent-orange: #f97316;
    --accent-orange-dark: #ea580c;
    --accent-orange-light: #fb923c;
    --cyan-accent: #06b6d4;
    --pink-accent: #ec4899;
    
    /* ダークカラーシステム */
    --dark-900: #0f0f23;
    --dark-800: #1a1a2e;
    --dark-700: #16213e;
    --dark-600: #0e3460;
    --dark-500: #1e40af;
    --dark-400: #3b82f6;
    --dark-300: #60a5fa;
    --dark-200: #93c5fd;
    --dark-100: #dbeafe;
    
    /* グレースケール */
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --white: #ffffff;
    
    /* グラデーション */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #f97316 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #ec4899 100%);
    --gradient-dark: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
    --gradient-glow: linear-gradient(135deg, rgba(139, 92, 246, 0.3) 0%, rgba(249, 115, 22, 0.3) 100%);
    
    /* ネオングロー効果 */
    --glow-purple: 0 0 20px rgba(139, 92, 246, 0.5);
    --glow-orange: 0 0 20px rgba(249, 115, 22, 0.5);
    --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.5);
    --glow-pink: 0 0 20px rgba(236, 72, 153, 0.5);
    
    /* シャドウ */
    --shadow-dark: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-dark-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-dark-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --shadow-neon: 0 0 30px rgba(139, 92, 246, 0.4);
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* ボーダーラディウス */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    
    /* トランジション */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ベースタイポグラフィ */
body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--gray-100);
    background: var(--gradient-dark);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

::selection {
    background: var(--primary-purple);
    color: var(--white);
}

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

/* ==========================================
   ローディングスクリーン
   ========================================== */

.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark-900);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out, visibility 0.5s ease-out;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.mono-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: var(--glow-purple); }
    50% { transform: scale(1.1); box-shadow: var(--glow-orange); }
}

.loading-logo h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    font-family: var(--font-secondary);
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: var(--dark-700);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.loading-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    animation: loading 3s ease-in-out;
}

@keyframes loading {
    0% { width: 0%; }
    100% { width: 100%; }
}

.loading-text {
    color: var(--gray-400);
    font-size: 0.875rem;
    animation: fadeInOut 2s ease-in-out infinite;
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* ==========================================
   ナビゲーション
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 35, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    transition: var(--transition-normal);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

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

.brand-icon {
    width: 45px;
    height: 45px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    box-shadow: var(--glow-purple);
    transition: var(--transition-normal);
}

.brand-icon:hover {
    transform: rotate(180deg);
    box-shadow: var(--glow-orange);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    font-family: var(--font-secondary);
}

.brand-tagline {
    font-size: 0.75rem;
    color: var(--gray-400);
    font-family: var(--font-secondary);
    font-weight: 300;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    color: var(--gray-300);
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
    z-index: -1;
}

.nav-link:hover::before,
.nav-link.active::before {
    left: 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--white);
    box-shadow: var(--glow-purple);
}

.nav-link i {
    font-size: 1rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-purple);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

/* ==========================================
   ヒーローセクション
   ========================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.neural-network {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(249, 115, 22, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
    animation: networkPulse 8s ease-in-out infinite;
}

@keyframes networkPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.floating-elements {
    position: absolute;
    width: 100%;
    height: 100%;
}

.floating-elements::before,
.floating-elements::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.1;
    animation: float 15s ease-in-out infinite;
}

.floating-elements::before {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.floating-elements::after {
    bottom: 10%;
    right: 10%;
    animation-delay: 7.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(90deg); }
    50% { transform: translateY(-40px) rotate(180deg); }
    75% { transform: translateY(-20px) rotate(270deg); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid var(--primary-purple);
    border-radius: var(--radius-2xl);
    color: var(--primary-purple-light);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--glow-purple);
    animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: var(--glow-purple); }
    50% { box-shadow: var(--glow-orange); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    font-family: var(--font-secondary);
}

.title-line {
    display: block;
    opacity: 0;
    animation: slideInUp 0.8s ease-out forwards;
}

.title-line:nth-child(1) { animation-delay: 0.2s; }
.title-line:nth-child(2) { animation-delay: 0.4s; }
.title-line:nth-child(3) { animation-delay: 0.6s; }

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-300);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    animation: fadeIn 1s ease-out 1s forwards;
}

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

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    animation: fadeIn 1s ease-out 1.2s forwards;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    opacity: 0;
    animation: fadeIn 1s ease-out 1.4s forwards;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-purple);
    font-family: var(--font-secondary);
    text-shadow: var(--glow-purple);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-400);
    font-weight: 500;
    margin-top: var(--spacing-xs);
}

/* ==========================================
   テックスフィア（ヒーロービジュアル）
   ========================================== */

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.tech-sphere {
    width: 400px;
    height: 400px;
    position: relative;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.sphere-inner {
    width: 100%;
    height: 100%;
    position: relative;
    border: 2px solid rgba(139, 92, 246, 0.3);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    box-shadow: inset var(--glow-purple), var(--glow-purple);
}

.orbit {
    position: absolute;
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: 50%;
    animation: counterRotate 20s linear infinite;
}

@keyframes counterRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(-360deg); }
}

.orbit-1 {
    width: 120%;
    height: 120%;
    top: -10%;
    left: -10%;
    animation-duration: 15s;
}

.orbit-2 {
    width: 140%;
    height: 140%;
    top: -20%;
    left: -20%;
    animation-duration: 25s;
}

.orbit-3 {
    width: 160%;
    height: 160%;
    top: -30%;
    left: -30%;
    animation-duration: 35s;
}

.satellite {
    position: absolute;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    box-shadow: var(--glow-orange);
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    animation: satelliteRotate 20s linear infinite;
}

@keyframes satelliteRotate {
    from { transform: translateX(-50%) rotate(0deg); }
    to { transform: translateX(-50%) rotate(360deg); }
}

/* ==========================================
   ボタンスタイル
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    font-family: var(--font-secondary);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-dark-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-dark-xl), var(--glow-purple);
}

.btn-outline {
    background: transparent;
    color: var(--primary-purple);
    border: 2px solid var(--primary-purple);
}

.btn-outline:hover {
    background: var(--primary-purple);
    color: var(--white);
    box-shadow: var(--glow-purple);
    transform: translateY(-2px);
}

.btn-ghost {
    background: rgba(139, 92, 246, 0.1);
    color: var(--primary-purple);
    border: 1px solid var(--primary-purple);
}

.btn-ghost:hover {
    background: var(--primary-purple);
    color: var(--white);
    box-shadow: var(--glow-purple);
}

/* ==========================================
   セクション共通スタイル
   ========================================== */

section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid var(--primary-purple);
    border-radius: var(--radius-xl);
    color: var(--primary-purple);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-secondary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-300);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ==========================================
   企業情報セクション
   ========================================== */

.about {
    background: var(--dark-800);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.company-overview h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    font-family: var(--font-secondary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.company-description {
    font-size: 1.125rem;
    color: var(--gray-300);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.company-vision {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.vision-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(139, 92, 246, 0.05);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-xl);
    transition: var(--transition-normal);
}

.vision-item:hover {
    background: rgba(139, 92, 246, 0.1);
    border-color: var(--primary-purple);
    box-shadow: var(--glow-purple);
    transform: translateX(10px);
}

.vision-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.vision-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-secondary);
}

.vision-content p {
    color: var(--gray-300);
    line-height: 1.6;
}

.company-info-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.info-card {
    background: rgba(26, 26, 46, 0.8);
    border: 1px solid var(--dark-600);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
    transition: var(--transition-normal);
}

.info-card.glowing {
    border-color: var(--primary-purple);
    box-shadow: var(--glow-purple);
}

.info-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-dark-lg), var(--glow-purple);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.card-header i {
    font-size: 1.5rem;
    color: var(--primary-purple);
}

.card-header h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    font-family: var(--font-secondary);
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--dark-600);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--gray-400);
    font-size: 0.875rem;
    font-weight: 500;
}

.info-value {
    color: var(--white);
    font-weight: 600;
    text-align: right;
    max-width: 60%;
    word-break: break-word;
}

/* ==========================================
   ソリューションセクション
   ========================================== */

.solutions {
    background: var(--gradient-dark);
    position: relative;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.solution-card {
    background: rgba(26, 26, 46, 0.6);
    border: 1px solid var(--dark-600);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
    backdrop-filter: blur(10px);
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-glow);
    opacity: 0;
    transition: var(--transition-normal);
    pointer-events: none;
}

.solution-card:hover::before {
    opacity: 1;
}

.solution-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-dark-xl), var(--glow-purple);
}

.solution-card.featured {
    border-color: var(--accent-orange);
    box-shadow: var(--glow-orange);
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    animation: cardGlow 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes cardGlow {
    0%, 100% { transform: rotate(0deg); opacity: 0.3; }
    50% { transform: rotate(180deg); opacity: 0.6; }
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.solution-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: var(--glow-purple);
    animation: iconPulse 3s ease-in-out infinite;
}

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

.solution-badge,
.featured-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--accent-orange);
    color: var(--white);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.featured-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--pink-accent);
}

.card-content {
    position: relative;
    z-index: 1;
    margin-bottom: var(--spacing-lg);
}

.card-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-secondary);
}

.card-content p {
    color: var(--gray-300);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-300);
    font-size: 0.875rem;
}

.feature-list i {
    color: var(--primary-purple);
    font-size: 0.75rem;
}

.card-footer {
    position: relative;
    z-index: 1;
}

/* ==========================================
   テクノロジーセクション
   ========================================== */

.technology {
    background: var(--dark-800);
    position: relative;
}

.tech-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.tech-visual {
    position: relative;
}

.tech-diagram {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
}

.tech-node {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: rgba(26, 26, 46, 0.8);
    border: 2px solid var(--primary-purple);
    border-radius: var(--radius-xl);
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    transition: var(--transition-normal);
    cursor: pointer;
}

.tech-node:hover {
    transform: scale(1.1);
    box-shadow: var(--glow-purple);
}

.tech-node i {
    font-size: 1.5rem;
    color: var(--primary-purple);
}

.tech-node.central {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--gradient-primary);
    border-color: var(--accent-orange);
    box-shadow: var(--glow-orange);
}

.tech-node.central i {
    color: var(--white);
}

.tech-node.ai {
    top: 10%;
    left: 20%;
}

.tech-node.blockchain {
    top: 10%;
    right: 20%;
}

.tech-node.iot {
    bottom: 10%;
    left: 20%;
}

.tech-node.cloud {
    bottom: 10%;
    right: 20%;
}

.connection-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.connection-lines::before,
.connection-lines::after {
    content: '';
    position: absolute;
    width: 2px;
    background: linear-gradient(45deg, var(--primary-purple), var(--accent-orange));
    animation: connectionPulse 2s ease-in-out infinite;
}

@keyframes connectionPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.tech-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.tech-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(26, 26, 46, 0.6);
    border: 1px solid var(--dark-600);
    border-radius: var(--radius-xl);
    transition: var(--transition-normal);
    cursor: pointer;
}

.tech-item.active,
.tech-item:hover {
    border-color: var(--primary-purple);
    background: rgba(139, 92, 246, 0.1);
    box-shadow: var(--glow-purple);
    transform: translateX(10px);
}

.tech-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.tech-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-secondary);
}

.tech-content p {
    color: var(--gray-300);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.tech-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tech-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(139, 92, 246, 0.2);
    color: var(--primary-purple-light);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
}

/* ==========================================
   お問い合わせセクション
   ========================================== */

.contact {
    background: var(--gradient-dark);
    position: relative;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: rgba(26, 26, 46, 0.6);
    border: 1px solid var(--dark-600);
    border-radius: var(--radius-xl);
    transition: var(--transition-normal);
    backdrop-filter: blur(10px);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.card-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-secondary);
}

.contact-value {
    color: var(--primary-purple-light);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.contact-note {
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* ==========================================
   フォームスタイル
   ========================================== */

.contact-form-wrapper {
    position: relative;
}

.form-container {
    background: rgba(26, 26, 46, 0.8);
    border: 1px solid var(--dark-600);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    backdrop-filter: blur(10px);
}

.form-container h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    font-family: var(--font-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    position: relative;
}

.form-group label {
    display: block;
    color: var(--gray-300);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) 0;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--dark-600);
    color: var(--white);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-normal);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-bottom-color: var(--primary-purple);
}

.form-group input:focus + .input-line,
.form-group select:focus + .input-line,
.form-group textarea:focus + .input-line {
    transform: scaleX(1);
}

.input-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    position: relative;
    overflow: hidden;
}

.btn-text,
.btn-loader {
    transition: var(--transition-normal);
}

.btn-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
}

.btn-submit.loading .btn-text,
.btn-submit.loading .btn-icon {
    opacity: 0;
}

.btn-submit.loading .btn-loader {
    opacity: 1;
}

/* ==========================================
   フッター
   ========================================== */

.footer {
    background: var(--dark-900);
    color: var(--gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.footer-brand .brand-icon {
    background: var(--gradient-primary);
    box-shadow: var(--glow-purple);
}

.brand-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-secondary);
}

.brand-info p {
    color: var(--gray-400);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.brand-motto {
    font-style: italic;
    color: var(--primary-purple-light);
    font-weight: 500;
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-secondary);
}

.footer-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-section a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition-normal);
    position: relative;
}

.footer-section a::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary-purple);
    border-radius: 50%;
    opacity: 0;
    transition: var(--transition-normal);
}

.footer-section a:hover {
    color: var(--primary-purple-light);
    transform: translateX(10px);
}

.footer-section a:hover::before {
    opacity: 1;
}

.footer-contact .contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-contact .contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-400);
    font-size: 0.875rem;
}

.footer-contact .contact-item i {
    color: var(--primary-purple);
    width: 20px;
}

.footer-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-purple), transparent);
    margin-bottom: var(--spacing-lg);
}

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

.footer-bottom-content p {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid var(--primary-purple);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-purple);
    text-decoration: none;
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-purple);
    color: var(--white);
    box-shadow: var(--glow-purple);
    transform: translateY(-3px);
}

/* ==========================================
   トップに戻るボタン
   ========================================== */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-dark-lg);
    transition: var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-dark-xl), var(--glow-purple);
}

/* ==========================================
   レスポンシブデザイン
   ========================================== */

@media (max-width: 1024px) {
    .hero-container,
    .about-grid,
    .tech-showcase,
    .contact-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .tech-sphere {
        width: 300px;
        height: 300px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--dark-900);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-xl);
        transition: var(--transition-normal);
        backdrop-filter: blur(20px);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-diagram {
        width: 250px;
        height: 250px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .tech-sphere {
        width: 200px;
        height: 200px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* ==========================================
   アニメーション & エフェクト
   ========================================== */

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

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

/* データ属性によるアニメーション制御 */
[data-tilt] {
    transform-style: preserve-3d;
    transition: var(--transition-normal);
}

[data-tilt]:hover {
    transform: perspective(1000px) rotateX(5deg) rotateY(5deg);
}

/* スクロールバーカスタマイズ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-800);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-purple);
}

/* セレクションスタイル */
::selection {
    background: var(--primary-purple);
    color: var(--white);
}

/* フォーカススタイル */
*:focus {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}

/* ==========================================
   ユーティリティクラス
   ========================================== */

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glow-text {
    text-shadow: var(--glow-purple);
}

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}