/* CSS Variables */
:root {
    --primary-color: #5865F2;
    --primary-hover: #4752C4;
    --secondary-color: #99AAB5;
    --background: #FFFFFF;
    --surface: #F8F9FA;
    --text-primary: #2C2F33;
    --text-secondary: #72767D;
    --border-color: #E3E5E8;
    --success-color: #57F287;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --border-radius: 16px;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

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

body {
    font-family: 'Zen Kaku Gothic New', 'Lato', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    overflow-x: hidden;
}

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

/* ヒーローセクション */
.hero {
    background: var(--gradient-primary);
    color: white;
    padding: 120px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 900px;
    margin: 0 auto;
}

.bot-icon {
    margin-bottom: 40px;
}

.bot-avatar {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    border: 5px solid var(--glass-border);
    box-shadow: 
        var(--shadow-hover),
        0 0 0 10px var(--glass-bg);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.bot-avatar:hover {
    transform: scale(1.1) translateY(-10px);
    border-color: rgba(255, 255, 255, 0.4);
}

.hero-title {
    font-size: 4em;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #fff, #e0e6ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-catchphrase {
    font-size: 2em;
    font-weight: 300;
    margin-bottom: 25px;
    color: rgba(255, 255, 255, 0.95);
    letter-spacing: 1px;
    text-shadow: 1px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-description {
    font-size: 1.3em;
    margin-bottom: 50px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ボタンスタイル */
.cta-buttons {
    display: flex;
    gap: 25px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 36px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1em;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.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: left 0.5s;
}

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

.btn i {
    font-size: 1.3em;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: var(--glass-bg);
    color: black;
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-hover);
}

/* セクションスタイル */
.section-title {
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 50px;
    color: var(--text-primary);
    font-weight: 700;
}

/* 機能紹介セクション */
.features {
    padding: 120px 0;
    background: 
        linear-gradient(135deg, var(--surface) 0%, white 100%),
        radial-gradient(circle at 50% 50%, rgba(88, 101, 242, 0.05) 0%, transparent 50%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.feature-card {
    background: white;
    padding: 50px 40px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3.5em;
    margin-bottom: 25px;
    color: var(--primary-color);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.feature-card h3 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ステータス・リンクセクション */
.status-links {
    padding: 120px 0;
    background: var(--gradient-primary);
    color: white;
    position: relative;
}

.status-links::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.status-links .container {
    position: relative;
    z-index: 2;
}

.status-links .section-title {
    color: white;
}

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

.link-card {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    padding: 40px 35px;
    border-radius: var(--border-radius);
    text-decoration: none;
    color: white;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    display: block;
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s;
}

.link-card:hover::before {
    left: 100%;
}

.link-card:hover {
    transform: translateY(-5px) scale(1.02);
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-hover);
}

.link-icon {
    font-size: 3em;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.9);
}

.link-card h3 {
    font-size: 1.4em;
    margin-bottom: 12px;
    color: white;
}

.link-card p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1em;
    line-height: 1.6;
}

/* フッター */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 20px;
}

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

.footer-info h3 {
    font-size: 1.5em;
    margin-bottom: 10px;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.7);
    font-style: italic;
}

.footer-links h4 {
    margin-bottom: 15px;
    font-size: 1.2em;
}

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

.footer-links ul li {
    margin-bottom: 8px;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 40px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: var(--shadow-hover);
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    top: 15px;
    right: 20px;
}

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

.modal-content h2 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.permissions-info {
    background: var(--surface);
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.permissions-info h3 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

.permissions-info ul {
    list-style: none;
}

.permissions-info ul li {
    padding: 5px 0;
    color: var(--text-secondary);
}

.permissions-info ul li::before {
    content: "";
    color: var(--success-color);
    font-weight: bold;
    margin-right: 8px;
}

.modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5em;
    }
    
    .hero-catchphrase {
        font-size: 1.4em;
    }
    
    .hero-description {
        font-size: 1.1em;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .section-title {
        font-size: 2em;
    }
    
    .features-grid,
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 5% auto;
        padding: 30px 20px;
        width: 95%;
    }
    
    .modal-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 15px;
    }
    
    .hero-title {
        font-size: 2em;
    }
    
    .hero-catchphrase {
        font-size: 1.2em;
    }
    
    .bot-avatar {
        width: 100px;
        height: 100px;
    }
    
    .container {
        padding: 0 15px;
    }
}