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

:root {
    /* Colors */
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --background: #ffffff;
    --background-secondary: #f8fafc;
    --background-dark: #0f172a;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --border-light: #e2e8f0;
    --gradient-primary: linear-gradient(135deg, #3b82f6, #10b981);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 400ms ease-in-out;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

/* Auth Pages Styles */
.auth-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.auth-section {
    padding: var(--spacing-20) 0;
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
}

.auth-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.auth-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
    min-height: 600px;
}

.auth-content.login-layout {
    grid-template-columns: 1fr;
    justify-content: center;
    max-width: 480px;
    margin: 0 auto;
}

.auth-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.auth-info h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-6);
    line-height: 1.2;
}

.auth-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.auth-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.auth-form-container {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-10);
    border: 1px solid var(--border-light);
}

.auth-form-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.auth-form-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-2);
}

.auth-form-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-input {
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input::placeholder {
    color: var(--text-light);
}

.password-requirements {
    margin-top: var(--spacing-1);
}

.password-requirements small {
    color: var(--text-light);
    font-size: var(--font-size-xs);
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-3);
    justify-content: space-between;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
    cursor: pointer;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    flex: 1;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    margin-top: 2px;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '✓';
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.checkbox-text {
    color: var(--text-secondary);
}

.checkbox-text a {
    color: var(--primary-color);
    text-decoration: none;
}

.checkbox-text a:hover {
    text-decoration: underline;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    white-space: nowrap;
}

.forgot-password:hover {
    text-decoration: underline;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-primary.full-width {
    width: 100%;
}

.btn-text, .btn-loading {
    transition: all var(--transition-fast);
}

.btn-loading.hidden, .btn-text.hidden {
    display: none;
}

.form-divider {
    text-align: center;
    position: relative;
    margin: var(--spacing-4) 0;
}

.form-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-light);
}

.form-divider span {
    background: white;
    color: var(--text-light);
    padding: 0 var(--spacing-4);
    font-size: var(--font-size-sm);
}

.social-auth {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: white;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.social-icon {
    width: 20px;
    height: 20px;
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-6);
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--border-light);
}

.auth-footer p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 480px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-6) var(--spacing-6) 0;
}

.modal-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--text-light);
    cursor: pointer;
    padding: var(--spacing-1);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-secondary);
}

.modal-body {
    padding: var(--spacing-6);
}

.modal-body p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-4);
    line-height: 1.6;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-3);
    justify-content: flex-end;
    margin-top: var(--spacing-6);
}

.btn-secondary {
    background: var(--background-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--border-light);
}

/* Alert Styles */
.alert {
    position: fixed;
    top: var(--spacing-6);
    right: var(--spacing-6);
    max-width: 400px;
    padding: var(--spacing-4) var(--spacing-5);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 2001;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-3);
}

.alert.hidden {
    display: none;
}

.alert.success {
    background: #10b981;
    color: white;
}

.alert.error {
    background: #ef4444;
    color: white;
    border-left: 5px solid #dc2626;
    box-shadow: 0 10px 25px rgba(239, 68, 68, 0.2);
}

.alert-text {
    flex: 1;
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
}

.alert-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.alert-close:hover {
    color: white;
}

/* Responsive Design for Auth Pages */
@media (max-width: 768px) {
    .auth-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
        text-align: center;
    }
    
    .auth-info {
        order: 2;
    }
    
    .auth-form-container {
        order: 1;
        padding: var(--spacing-6);
    }
    
    .auth-info h1 {
        font-size: var(--font-size-3xl);
    }
    
    .checkbox-group {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-2);
    }
    
    .forgot-password {
        margin-top: var(--spacing-2);
    }
    
    .alert {
        left: var(--spacing-4);
        right: var(--spacing-4);
        max-width: none;
    }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 10px;
    left: 10px;
    right: 10px;
    /* デフォルト：透明背景（ヒーローセクション） */
    background: transparent;
    z-index: 1000;
    transition: transform 0.3s ease-in-out, background 0.3s ease-in-out;
}

/* スクロール時：すりガラス背景 */
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.nav-container {
    /* max-widthを削除して画面幅いっぱいに */
    width: 100%;
    padding: 0 var(--spacing-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-image {
    height: 70px;
    width: auto;
    transition: all var(--transition-base);
    position: relative;
    top: 5px;
}

.logo-image:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}

.nav-link {
    text-decoration: none;
    color: #1a1a1a;
    font-weight: 700;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: #1a1a1a;
    opacity: 0.7;
}

.nav-link.cta-button {
    background: #1a1a1a;
    color: white;
    font-weight: 700;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.nav-link.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    opacity: 0.9;
}

/* Hero Section */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

/* Background Color Layers */
.hero-bg-layers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg-layer {
    position: absolute;
}

/* Left Pink Section */
.hero-bg-pink {
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: #fbaed2;
}

/* Right Top Blue Section */
.hero-bg-blue {
    top: 0;
    right: 25%;
    width: 25%;
    height: 50%;
    background: #009de6;
}

/* Right Top Green Section */
.hero-bg-green {
    top: 0;
    right: 0;
    width: 25%;
    height: 50%;
    background: #00bbb1;
}

/* Right Bottom Yellow Section */
.hero-bg-yellow {
    bottom: 0;
    right: 0;
    width: 50%;
    height: 50%;
    background: #ffdb00;
}

/* Pink Person Layer (Independent) */
.hero-person-pink-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    z-index: 10;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.hero-person-pink-image {
    height: 100%;
    width: auto;
    object-fit: contain;
    object-position: center bottom;
    transform: translateY(50px);
}

/* Person Image Layers - Blue (Independent) */
.hero-person-blue-layer {
    position: absolute;
    top: 0;
    right: 25%;
    width: 25%;
    height: 50%;
    z-index: 3;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
}

.hero-person-blue-image {
    height: 180%;
    width: auto;
    object-fit: contain;
    object-position: center bottom;
    /* 重要: JavaScriptのパララックス効果と同期 (script.js line 369) */
    transform: translateX(0px) translateY(53%);
}

/* Person Image Layers - Green (Independent) */
.hero-person-green-layer {
    position: absolute;
    top: 0;
    right: 0;
    width: 25%;
    height: 50%;
    z-index: 3;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    overflow: hidden;
}

.hero-person-green-image {
    height: 110%;
    width: auto;
    object-fit: contain;
    object-position: center bottom;
    /* 重要: JavaScriptのパララックス効果と同期 (script.js line 374) */
    transform: translateX(0px) translateY(29%);
}

/* Logo Typography Layers (Independent) */
.hero-logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: auto;
    height: 33.333%;
    pointer-events: none;
    overflow: hidden;
}

.hero-logo img {
    height: 100%;
    width: auto;
    display: block;
}

.hero-logo-top {
    top: 30px;
    z-index: 2;
}

.hero-logo-middle {
    top: calc(33.333% + 30px);
    z-index: 5;
}

.hero-logo-bottom {
    top: calc(66.666% + 30px);
    z-index: 20;
}


/* Device Image Layer */
.hero-device-layer {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 50%;
    height: 50%;
    z-index: 30;
    overflow: visible;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 5%;
    /* アイコンの基準点としても機能 */
}

.hero-device-image {
    height: 192%; /* 160% × 1.2 = 192% (120%拡大) */
    width: auto;
    object-fit: contain;
    object-position: center top;
    /* 重要: JavaScriptのパララックス効果と同期 (script.js line 376) */
    transform: translateY(-25%); /* PC版の初期位置 */
}

/* Floating Icons around Device */
.hero-device-icon {
    position: absolute;
    object-fit: contain;
    z-index: 35;
    /* 親要素(.hero-device-layer)を基準とした相対位置 */
}

/* Left side - upper */
.hero-device-icon-1 {
    left: 10%; /* デバイスレイヤー内での位置 */
    top: 30%;
    width: 160px;
    height: 160px;
}

/* Right side - upper */
.hero-device-icon-2 {
    right: 10%; /* デバイスレイヤー内での位置 */
    top: 20%;
    width: 80px;
    height: 80px;
}

/* Right side - lower */
.hero-device-icon-3 {
    right: 5%; /* デバイスレイヤー内での位置 */
    bottom: 10%; /* デバイスレイヤー内での位置 */
    width: 240px;
    height: 240px;
}

/* Text Content Layer */
.hero-content-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: center;
    /* ヒーローセクションでは画像のみで訴求するため非表示 */
    visibility: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    width: 100%;
}

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

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
    color: #ffffff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.gradient-text {
    color: #ffffff;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: #ffffff;
    margin-bottom: var(--spacing-8);
    line-height: 1.7;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.2);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-4);
    align-items: center;
}

.btn-primary, .btn-secondary {
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-base);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

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

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 2px solid var(--border-light);
}

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

.btn-primary.large, .btn-secondary.large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

/* Hero Visual */
.hero-visual {
    position: relative;
}

.dashboard-preview {
    position: relative;
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.dashboard-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
}

.dashboard-image::before {
    content: '📊 Dashboard Preview';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
}

.floating-card {
    position: absolute;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    animation: float 3s ease-in-out infinite;
}

.emotion-card {
    top: 20px;
    right: -20px;
    width: 120px;
}

.analytics-card {
    bottom: 20px;
    left: -20px;
    width: 100px;
}

.card-header {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    margin-bottom: var(--spacing-2);
}

.score-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--secondary-color);
}

.score-trend {
    font-size: var(--font-size-sm);
    color: var(--secondary-color);
}

.analytics-bars {
    display: flex;
    gap: var(--spacing-2);
    align-items: end;
    height: 40px;
}

.bar {
    width: 8px;
    border-radius: var(--radius-sm);
    background: var(--primary-color);
}

.bar.joy { background: #f59e0b; }
.bar.calm { background: #10b981; }
.bar.energy { background: #ef4444; }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Product Introduction Section */
.product-intro {
    padding: var(--spacing-24) 0;
    background: white;
}

.product-intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.product-intro-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.device-image {
    width: 100%;
    max-width: 500px;
    height: auto;
    object-fit: contain;
}

.product-intro-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.product-intro-title {
    font-size: 30px;
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.4;
}

.product-intro-description {
    font-size: 18px;
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.8;
}

.app-download {
    margin-top: var(--spacing-6);
}

.app-store-button {
    display: inline-block;
    transition: transform var(--transition-fast);
}

.app-store-button:hover {
    transform: translateY(-2px);
}

.app-store-button img {
    height: 50px;
    width: auto;
}

/* Features Section */
.features {
    padding: var(--spacing-24) 0;
    background: var(--background);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-title {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.feature-card {
    background: white;
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-4);
    display: block;
    text-align: center;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-3);
    color: #1a1a1a;
    text-align: center;
}

.feature-card p {
    color: #1a1a1a;
    font-weight: 700;
    line-height: 1.6;
    text-align: center;
}

/* Technology Section */
.technology {
    padding: var(--spacing-24) 0;
    background: var(--background-secondary);
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.tech-text h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    color: var(--text-primary);
}

.tech-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
    line-height: 1.7;
}

.tech-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.tech-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.tech-icon {
    font-size: var(--font-size-2xl);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.tech-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    color: var(--text-primary);
}

.tech-item p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.tech-visual {
    position: relative;
}

.tech-diagram {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-lg);
}

.tech-image {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-6);
}

.tech-image::before {
    content: '🏗️ Tech Architecture';
}

.tech-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.step-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
}

.flow-arrow {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

/* Use Cases */
.use-cases {
    padding: var(--spacing-24) 0;
    background: var(--background);
}

.use-cases .section-title {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
    margin-top: var(--spacing-12);
}

.case-card {
    background: white;
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    text-align: center;
    transition: all var(--transition-base);
}

.case-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.case-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-4);
}

.case-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-3);
    color: #1a1a1a;
}

.case-card p {
    color: #1a1a1a;
    font-weight: 700;
    line-height: 1.6;
}

/* Pricing Section */
.pricing {
    padding: var(--spacing-24) 0;
    background: var(--background-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
    margin-top: var(--spacing-12);
}

.pricing-card {
    background: white;
    border-radius: var(--radius-2xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-2) var(--spacing-4);
    border-bottom-left-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.plan-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.plan-header h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-1);
}

.price-value {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-color);
}

.price-period {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.plan-features {
    list-style: none;
    margin-bottom: var(--spacing-8);
}

.plan-features li {
    padding: var(--spacing-3) 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

.plan-features li:last-child {
    border-bottom: none;
}

.plan-button {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-6);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
}

.plan-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* CTA Section */
.cta {
    padding: var(--spacing-24) 0;
    background: var(--background-dark);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
}

.cta-content p {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    margin-bottom: var(--spacing-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    align-items: center;
}

/* Footer */
.footer {
    background: var(--background-dark);
    color: white;
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-16);
    margin-bottom: var(--spacing-12);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-4);
}

.footer-logo-image {
    height: 36px;
    width: auto;
    filter: brightness(0) invert(1); /* White logo for dark footer */
    transition: all var(--transition-base);
}

.footer-logo-image:hover {
    transform: scale(1.05);
    opacity: 0.8;
}

.footer-brand p {
    color: #1a1a1a;
    font-weight: 700;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.link-group h4 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: #1a1a1a;
}

.link-group a {
    display: block;
    color: #1a1a1a;
    font-weight: 700;
    text-decoration: none;
    margin-bottom: var(--spacing-2);
    transition: color var(--transition-fast);
}

.link-group a:hover {
    color: #1a1a1a;
    opacity: 0.7;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid #334155;
    color: #1a1a1a;
    font-weight: 700;
}

/* About Page Styles */
.page-header {
    padding: 120px 0 var(--spacing-16);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    text-align: center;
}

.page-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.company-overview {
    padding: var(--spacing-24) 0;
    background: var(--background);
}

.overview-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.overview-content h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    color: var(--text-primary);
}

.mission-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
}

.mission-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-6);
}

.value-item {
    text-align: center;
    padding: var(--spacing-6);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

.value-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.value-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-3);
}

.value-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
}

.value-item p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.overview-image {
    position: relative;
}

.company-photo {
    background: white;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
}

.about-image::before {
    content: '🏢 Company Photo';
}

.company-info {
    padding: var(--spacing-24) 0;
    background: var(--background-secondary);
}

.info-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-16);
}

.company-table {
    width: 100%;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.company-table th,
.company-table td {
    padding: var(--spacing-4) var(--spacing-6);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.company-table th {
    background: var(--background-secondary);
    font-weight: 600;
    color: var(--text-primary);
    width: 140px;
    vertical-align: top;
}

.company-table td {
    color: var(--text-secondary);
    line-height: 1.6;
}

.company-table tr:last-child th,
.company-table tr:last-child td {
    border-bottom: none;
}

.map-container {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-sm);
    height: 100%;
}

.map-placeholder {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    text-align: center;
    height: 250px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.map-placeholder h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.map-placeholder p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.company-history {
    padding: var(--spacing-24) 0;
    background: var(--background);
}

.history-timeline {
    position: relative;
    padding-left: var(--spacing-8);
}

.history-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-8);
    padding-left: var(--spacing-8);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 8px;
    width: 14px;
    height: 14px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
}

.timeline-date {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-2);
}

.timeline-content h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.leadership-team {
    padding: var(--spacing-24) 0;
    background: var(--background-secondary);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.team-member {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

.team-member:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.member-photo {
    text-align: center;
    margin-bottom: var(--spacing-6);
}

.member-image {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    margin: 0 auto;
}

.member-image::before {
    content: '👤';
    font-size: var(--font-size-4xl);
}

.member-info h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
    text-align: center;
}

.member-title {
    font-size: var(--font-size-base);
    color: var(--primary-color);
    font-weight: 500;
    text-align: center;
    margin-bottom: var(--spacing-4);
}

.member-bio {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.awards-recognition {
    padding: var(--spacing-24) 0;
    background: var(--background);
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-6);
}

.award-item {
    background: white;
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
}

.award-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.award-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-4);
}

.award-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--text-primary);
}

.award-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-3);
    font-size: var(--font-size-sm);
}

.award-date {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    font-weight: 500;
}

.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Hide pink background on mobile */
    .hero-bg-pink {
        display: none;
    }

    /* Hide pink person on mobile */
    .hero-person-pink-layer {
        display: none;
    }

    /* Expand blue section to full width */
    .hero-bg-blue {
        right: 50%;
        width: 50%;
    }

    /* Expand blue person to full width */
    .hero-person-blue-layer {
        right: 50%;
        width: 50%;
    }

    /* Expand green section to full width */
    .hero-bg-green {
        right: 0;
        width: 50%;
    }

    /* Expand green person to full width */
    .hero-person-green-layer {
        right: 0;
        width: 50%;
    }

    /* Yellow stays the same */
    .hero-bg-yellow {
        width: 100%;
    }

    /* Mobile: デバイスレイヤーを中央に配置 */
    .hero-device-layer {
        right: 50%;
        transform: translateX(50%);
        width: 80%; /* 中央に寄せて幅を広げる */
    }

    /* Mobile: デバイス画像サイズ調整 */
    .hero-device-image {
        height: 125%;
        /* 重要: JavaScriptのパララックス効果と同期 (script.js line 376) */
        transform: translateY(-12.5%); /* モバイル版の初期位置 */
    }

    /* Mobile: 人物画像サイズ調整 */
    .hero-person-blue-image {
        height: 150%;
        transform: translateY(50%);
    }

    .hero-person-green-image {
        height: 85%;
        transform: translateY(20%);
    }

    /* Mobile: アイコンをデバイスの周りに配置 */
    .hero-device-icon-1 {
        left: 5%;
        top: 20%;
        width: 80px; /* 160px → 80px */
        height: 80px;
    }

    .hero-device-icon-2 {
        right: 5%;
        top: 10%;
        width: 50px; /* 80px → 50px */
        height: 50px;
    }

    .hero-device-icon-3 {
        right: 0%;
        bottom: 15%;
        width: 120px; /* 240px → 120px */
        height: 120px;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
        text-align: center;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

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

    /* Product Introduction: モバイル対応 */
    .product-intro-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }

    .product-intro-text {
        order: 1;
    }

    .product-intro-image {
        order: 2;
    }

    .product-intro-title {
        font-size: 24px;
    }

    .product-intro-description {
        font-size: 16px;
    }

    .tech-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .nav-menu {
        display: none;
    }

    /* Mobile: ロゴサイズ調整 */
    .nav-logo .logo-image {
        height: 55px;
        top: 5px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-5px);
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    /* About Page Responsive */
    .overview-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .info-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .mission-values {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .awards-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
    
    .page-title {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 480px) {
    .container, .nav-container, .hero-container {
        padding: 0 var(--spacing-4);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .floating-card {
        position: static;
        margin: var(--spacing-4) 0;
    }
}