:root {
    --primary-color: #00d2ff;
    /* Cyan */
    --accent-color: #3a86ff;
    /* Blue */
    --secondary-color: #ffffff;
    --background-color: #0f172a;
    /* Dark Slate */
    --card-bg: rgba(30, 41, 59, 0.7);
    /* Semi-transparent dark */
    --text-color: #e2e8f0;
    /* Light Gray */
    --text-light: #94a3b8;
    /* Slate Gray */
    --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --radius: 16px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 40px;
}

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

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Background Animation Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

/* Header */
header {
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    color: white;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.main-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: bold;
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 20px;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.main-nav a:hover {
    background-color: rgba(0, 210, 255, 0.1);
    color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
}

/* Layout */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
    position: relative;
    z-index: 1;
}

.main-content {
    flex: 1;
    min-width: 0;
}

.sidebar {
    width: 300px;
    flex-shrink: 0;
}

/* Card Style (Glassmorphism) */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.45);
    border-color: rgba(0, 210, 255, 0.3);
}

/* Article */
.article-header {
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: var(--spacing-md);
}

.article-date {
    color: var(--primary-color);
    font-size: 0.9rem;
    display: block;
    margin-bottom: var(--spacing-sm);
    font-family: monospace;
}

.article-title {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.article-body h2 {
    font-size: 1.6rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 4px solid var(--primary-color);
    color: var(--secondary-color);
    background: linear-gradient(90deg, rgba(0, 210, 255, 0.1), transparent);
    padding-top: 5px;
    padding-bottom: 5px;
}

.article-body h3 {
    font-size: 1.3rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.article-body p {
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
}

.article-body ul {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.article-body li {
    margin-bottom: var(--spacing-sm);
}

.article-body strong {
    color: var(--primary-color);
}

.read-more-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 12px 28px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    margin-top: var(--spacing-md);
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 210, 255, 0.3);
}

.read-more-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 210, 255, 0.5);
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.grid-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.grid-card .card-body {
    flex-grow: 1;
}

/* News Card */
.news-card {
    border-left: 4px solid var(--primary-color);
}

.news-date {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
    display: block;
    font-family: monospace;
}

.news-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

/* Profile Page Main */
.profile-main-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.profile-main-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
    margin-bottom: var(--spacing-md);
}

.profile-main-name {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.profile-main-title {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.sns-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.sns-btn {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--secondary-color);
    padding: 12px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.sns-btn:hover {
    background-color: var(--primary-color);
    color: #0f172a;
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.4);
    border-color: var(--primary-color);
}

/* Profile Card (Sidebar) */
.profile-card {
    text-align: center;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    border: 3px solid var(--primary-color);
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.2);
}

.profile-name {
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    color: var(--secondary-color);
}

.profile-title {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    display: block;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.profile-bio {
    font-size: 0.95rem;
    color: var(--text-color);
    text-align: left;
    line-height: 1.6;
}

/* Sidebar Section */
.sidebar-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.sidebar-list {
    list-style: none;
    padding: 0;
}

.sidebar-list li {
    margin-bottom: var(--spacing-sm);
}

.sidebar-list a {
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s;
    display: block;
    padding: 6px 10px;
    border-radius: 8px;
}

.sidebar-list a:hover {
    color: var(--primary-color);
    background-color: rgba(255, 255, 255, 0.05);
    padding-left: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        order: 2;
    }

    .main-content {
        width: 100%;
    }

    header h1 {
        font-size: 1.8rem;
    }
}