:root {
    --color-bg: #05070a;
    --color-bg-secondary: #0a0c10;
    --color-text: #ffffff;
    --color-text-muted: #94a3b8;
    --color-accent: #3b82f6; /* Cyber Blue */
    --color-accent-glow: rgba(59, 130, 246, 0.5);
    --color-border: rgba(255, 255, 255, 0.1);
    --color-card-bg: rgba(255, 255, 255, 0.03);
    --color-card-hover: rgba(255, 255, 255, 0.07);
    
    --font-primary: "Inter", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "Courier New", Courier, monospace; /* For digital accents */
    
    --border-radius: 0px; /* Sharp edges */
    --container-width: 1200px;
    --spacing-unit: 1rem;
    --header-height: 80px;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0; 
    padding: 0;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    font-feature-settings: "palt";
    background-image: 
        radial-gradient(circle at 50% 0%, #1e3a8a 0%, transparent 40%),
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 40px 40px, 40px 40px;
    background-repeat: no-repeat, repeat, repeat;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Utils */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

/* Header */
.site-header {
    height: var(--header-height);
    background: rgba(5, 7, 10, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 32px; 
    height: 32px;
    fill: var(--color-accent);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--color-text);
    text-transform: uppercase;
}

.site-nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.site-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
    padding: 0.5rem 0;
}

.site-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
    box-shadow: 0 0 8px var(--color-accent);
}

.site-nav a:hover {
    color: var(--color-text);
}

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

/* Breadcrumbs */
.breadcrumbs {
    padding: 1rem 0;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
}

.breadcrumbs ol {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.breadcrumbs li {
    display: flex;
    align-items: center;
}

.breadcrumbs li:not(:last-child)::after {
    content: "/";
    margin-left: 0.5rem;
    color: var(--color-border);
    font-family: var(--font-mono);
}

.breadcrumbs a {
    color: var(--color-text-muted);
}

.breadcrumbs a:hover {
    color: var(--color-accent);
    text-shadow: 0 0 8px var(--color-accent);
}

.breadcrumbs li:last-child {
    color: var(--color-text);
    font-weight: 600;
}

/* Main Content */
.main-content {
    padding: 4rem 0;
    min-height: calc(100vh - var(--header-height) - 100px);
}

.page-header {
    margin-bottom: 3rem;
    animation: fadeIn 0.8s ease-out;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

/* Grid System */
.app-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 2rem;
}

@media (min-width: 768px) {
    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .app-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Card Design */
.app-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(5px);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;

    height: 100%;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.06), transparent 40%);
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}

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

.app-card:hover {
    /* transform: translateY(-4px); ← 削除 */
    border-color: var(--color-accent);
    box-shadow: 0 0 20px var(--color-accent-glow); /* ← 影も少し調整して光るだけにします */
}

.card-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    position: relative;
    border-bottom: 1px solid var(--color-border);
}

.card-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 40%, rgba(255,255,255,0.05) 50%, transparent 60%);
    background-size: 200% 200%;
    animation: shine 6s infinite;
}

.card-body {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    z-index: 2;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.card-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

.card-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    background: transparent;
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid var(--color-accent);
    border-radius: 0;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    align-self: center; /* ← 「中央揃え」に変更 */
    
}

.card-link:hover {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 0 15px var(--color-accent-glow);
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 3rem 0;
    margin-top: auto;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-align: center;
    background: var(--color-bg-secondary);
}

/* Animations */
@keyframes shine {
    0% { background-position: 200% center; }
    100% { background-position: -200% center; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}



/* --- アフィリエイト広告用コンテナ --- */
.ad-container {
    margin: 3rem auto;
    text-align: center;
    max-width: 800px;
    padding: 1.5rem;
    background: rgba(15, 23, 42, 0.4);
    border: 1px dashed #334155;
    overflow: hidden;
}

/* ★ SPONSORED LINKから変更 */
.ad-label {
    display: inline-block;
    font-size: 0.75rem;
    color: #94a3b8;
    background: #1e293b; /* ラベルっぽく背景をつける */
    padding: 0.2rem 0.8rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-weight: bold;
    letter-spacing: 0.05em;
}

.ad-container img {
    max-width: 100%;
    height: auto !important;
}

/* --- アフィリエイト共通明記エリア --- */
.site-disclosure {

    border-bottom: 1px dashed #1e293b;
    width: 100%; /* 背景の黒帯は画面いっぱいに広げる */
}

.disclosure-inner {
    max-width: 800px;  /* ★アプリ本体の幅に合わせる */
    margin: 0 auto;    /* ★左右の余白を均等にして中央に配置 */
    padding: 0.6rem 1rem;
    font-size: 0.75rem;
    color: #94a3b8;
    letter-spacing: 0.05em;
    text-align: right; /* ★右寄せにするとスタイリッシュに収まります */
}