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

:root {
    /* カラーパレット */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --dark-bg: #0a0a0f;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 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;
    
    /* ボーダー半径 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* シャドウ */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* ==================== 背景グラデーション ==================== */
.background-gradient {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 20%, rgba(79, 172, 254, 0.1) 0%, transparent 50%);
    animation: gradientShift 20s ease infinite;
    z-index: -1;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(5%, 5%) rotate(5deg);
    }
    66% {
        transform: translate(-5%, 5%) rotate(-5deg);
    }
}

/* ==================== ヘッダー ==================== */
.header {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-xl);
    position: relative;
}

.logo {
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
    animation: logoFloat 3s ease-in-out infinite;
    filter: drop-shadow(var(--shadow-glow));
    position: relative;
}

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

.tagline {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.05em;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.3s;
}

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

/* ==================== コンテナ ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md) var(--spacing-2xl);
}

/* ==================== 検索セクション ==================== */
.search-section {
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.5s;
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    pointer-events: none;
    transition: color 0.3s ease;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    outline: none;
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1), var(--shadow-md);
    background: rgba(255, 255, 255, 0.08);
}

.search-input:focus + .search-icon,
.search-box:hover .search-icon {
    color: #667eea;
}

/* ==================== アプリグリッド ==================== */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.7s;
}

.app-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

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

.app-card:hover {
    transform: translateY(-8px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    background: rgba(255, 255, 255, 0.08);
}

.app-card:active {
    transform: translateY(-4px);
}

.app-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-md);
}

.app-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.app-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ==================== 検索結果なし ==================== */
.no-results {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    color: var(--text-muted);
}

.no-results svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.no-results p {
    font-size: 1.1rem;
}

/* ==================== フッター ==================== */
.footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--card-border);
    margin-top: var(--spacing-2xl);
}

/* ==================== レスポンシブ ==================== */
@media (max-width: 768px) {
    .apps-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .header {
        padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
    }
    
    .container {
        padding: 0 var(--spacing-sm) var(--spacing-xl);
    }
}

/* ==================== アクセシビリティ ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==================== スクロールバー ==================== */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(102, 126, 234, 0.5);
}